Rubber spring ROSTA. Suspension-Tensioner

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Coral Robertson
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1 Rubber spring ROSTA Suspension-Tensioner

A Unique Structure And Operation Principles As A Multi-Functional Mechanical Elements Carry Out Stable Tensioning, Vibration Absorption And Noise Reduction.

2 A Unique Structure And Operation Principles As A Multi-Functional Mechanical Elements Carry Out Stable Tensioning, Vibration Absorption And Noise Reduction. Rubber springs ROSTA are composed of metallic inner and outer shells and columnar rubber pieces. Columnar rubber pieces are press fit between the inner and outer shells which have 45 displacement. The spring characteristics are non-linear and columnar rubber pieces are compressed as they roll and are actuated. Thus, shaking motion is correctly transmitted and vibration and noise are absorbed at the same time. The tensioners are rich in elasticity. Permanent set is slight and the tensioners strongly resist impact loads and excel in durability. R U B B E R S P R I N G R O S TA

1. Large Torsional Angle A unique structure with rolling and compressing rubber, torsional angles can be allowed up to ±30. 2. Ideal Spring Characteristics 3.

Excellent Vibration and Shock-Absorbing Action A damping rubber has been adopted which is rich in elasticity, excellent in insulation of vibration.

3 1. Large Torsional Angle A unique structure with rolling and compressing rubber, torsional angles can be allowed up to ± Ideal Spring Characteristics 3. Not only non-linear characteristics of spring, but also other directions as upper, lower, left and right sides can be applicable. Excellent Vibration and Shock-Absorbing Action A damping rubber has been adopted which is rich in elasticity, excellent in insulation of vibration. The intrinsic damping function of rubber is much larger compared with the metal, and comparatively obtains a significant damping effect. 4. Simple Structure, Excellent Durability Composition of 4 rubber pieces, metallic inner and outer shells -- light and compact. The preliminary compression rubber pieces are built in, elaborating an excellent durability for the fluctuations and the impact load. 5. Daily Maintenance Free The metals do not come in contact each other so that they will not wearout. Moreover, it will not get affection of water and dust so that daily maintenance is unnecessary. 6. Not Affected By Temperature Change Operation temperature range: -40 C to 80 C.

facilities, and the amusement equipment can be used as a multi-purpose mechanical elements.

4 R U B B E R S P R I N G R O S TA Suspension-Tensioner Equipped With Spring, Damper And Bearing Function. Rubber spring ROSTA is a suspension unit. It is a unique, simple structure with columnar rubber pieces pressed to fit in between metallic inner and outer shells, and even from Machine Industry to transportation, removal equipment, recreation facilities, and the amusement equipment can be used as a multi-purpose mechanical elements. Moreover, metallic portions do not come in contact, it is excellent in durability because of a simple structure, and also daily maintenance is unnecessary. Suspension-tensioner equipped with spring, damper and bearing function Spring function Torsional angles can be allowed up to± 30. The spring characteristics are nonlinear and torsional rigidity increases as the load increases. The torque characteristics are decided by the length of the tension. Moreover, loads in all directions of tensile, compressive and shear loads, can be supported. Damper function Inner friction of rubber bodies is more than 1,000 times compared with a metal (spring steel). This allows early stopping of vibration caused by a low amplitude or shock during resonance. Tensioners are used as shock absorbers, vibration isolators, anti-vibration supports and other purposes. Bearing function Tension rubber suspensions can transmit high-period shaking motion while absorbing vibration. Normally, durability of bearings lowers if transmission of shaking motion or oiling or greasing is not adequate. The bearing function provided by the tensioners can replace b a ll a n d n e e d l e b e a r i n g s without requiring routine maintenance service. Bearing function Compression function Shock absorption function Tension function Hinge function Shaking function Spring function Multi-functions, multi-purposes - ROSTA Suspension Unit Shapes of inner and outer shells, materials, installation method and two single parts connected shapes - There are six kinds of basic units ready to serve. It is a multi-purpose mechanical element that can be used on wide-range freely.

F U LL LINEUP TENSIONER DEVICES The basic tensioner unit - SE model is integrating the inner shell and metal arm, and the outer shell and flange.

ANTI-VIBRATION MOUNTINGS The dual-connected suspension unit, DO-A type, is combined to bracket to form the antivibration mounting ESL model and V model.

All models are designed as applicable for various directions of installation, compression, tension and shearing and allows the load in any direction.

5 F U LL LINEUP TENSIONER DEVICES The basic tensioner unit - SE model is integrating the inner shell and metal arm, and the outer shell and flange. The RSE model is a belt tensioner combining an aluminum alloy roller with the SE model. And the NSE model is a chain tensioner combining a sprocket idler with the SE model. ANTI-VIBRATION MOUNTINGS The dual-connected suspension unit, DO-A type, is combined to bracket to form the antivibration mounting ESL model and V model. ESL model is the best for anti-vibration at the medium and low frequency and V model is suitable for comparatively high frequency. All models are designed as applicable for various directions of installation, compression, tension and shearing and allows the load in any direction. OSCILLATING MOUNTINGS Shaking mount and drive head supporting a vibration conveyer or sieving machine can be designed by the ROSTA suspension unit. There are two main categories of oscillating mounting machines to excite oscillation, one is by crankmotion and the other is by vibrating motor. The former type, AU model, is a shaking mount used together with the drive-head RST model. And the latter type, AB model, is not only a mount, but can also be used as an anti-vibration mounting of the low frequency.

ROSTA Tensioner Maintains Appropriate Tension Of The Belt, And Automatically

The ROSTA tensioners can be used for tensioning, pressure rollers, and dumpers.

suspension unit. The outer shell has a flange shape.

installation for maintenance of appropriate belt tension, absorption of chain

Moreover, the arm has two mounting holes (normal and hard) so that the idler

The lineup consists of three models: the standard SE model with a bare arm, the

6 ROSTA Tensioner Maintains Appropriate Tension Of The Belt, And Automatically Absorbs Slack, Vibrations, And Shocks Of The Chain. The ROSTA tensioners can be used for tensioning, pressure rollers, and dumpers. The basic structure has an arm pre-installed to the inner shell of the ROSTA suspension unit. The outer shell has a flange shape. Installation can be done using only one center bolt, which allows easy installation for maintenance of appropriate belt tension, absorption of chain slack, the scraper of the conveyor belt, and pressure rollers. Moreover, the arm has two mounting holes (normal and hard) so that the idler mounting position can be selected according to the operating load range. The lineup consists of three models: the standard SE model with a bare arm, the RSE model with a pre-installed pulley idler, and the NSE model with a pre-installed sprocket idler. ROSTA Tensioner Tensioner unit + Pulley idler +Sprocket idler SE model RSE model NSE model Structure Outer shell Rubber Inner shell SE MODEL RSE MODEL NSE MODEL Pulley idler Sprocket idler Tensioner unit Tensioner unit Tensioner unit 4

7 ROSTA Tensioner ò Load range : 0N to 2600N ò Torsional angle : 0 to 30 ò Operating temperature range : 40 C to 80 C Tensioner 15

ROSTA TENSIONER SE MODEL Specification Model Load range F [N] Maximum displacement S1 [mm] Maximum displacement S2 [mm] Mass [kg] SE-11 0~80 40 30 0.20 SE-15 0~135 50 40 0.40 SE-18 0~350 50 40 0.

8 ROSTA TENSIONER SE MODEL Specification Model Load range F [N] Maximum displacement S1 [mm] Maximum displacement S2 [mm] Mass [kg] SE-11 0~ SE-15 0~ SE-18 0~ SE-27 0~ SE-38 0~ SE-45 0~ * Load range is for the normal position specification. Hard position load range 1.25 Normal position load range. Dimension (normal) (hard) S1 S2 C A D T normal T F hard F L H1 H2 B D G C E P R A M N Unit [mm] Model A B C D E G H1 H2 L N P R T M SE M6 20 SE1 SE M8 25 SE2 SE M10 30 SE3 SE M12 40 SE4 SE M16 40 SE5 SE M20 50 SE6 CAD file No. Ordering Information Size 16

9 ROSTA TENSIONER RSE MODEL Specification Model Load range F [N] Maximum displacement S1 [mm] Maximum displacement S2 [mm] Applicable belt Max. rotational speed [min -1 ] Mass [kg] RSE-11 0~ A RSE-15 0~ B RSE-18 0~ B RSE-27 0~ C RSE-38 0~ RSE-45 0~ * Load range is for the normal position specification. Hard position load range 1.25 Normal position load range. Dimension L3 L2 L1 S1 (normal) C A D M1 F H1 B F D D1 G A M Model A B D D1 G H1 L1 L2 L3 M M1 CAD file No. RSE M6 20 M8 45 RSE1 RSE M8 25 M10 60 RSE2 RSE M10 30 M10 60 RSE3 RSE M12 40 M12 75 RSE4 RSE M16 40 M RSE5 RSE M20 50 M RSE6 * For detailed dimensions of the tensioner part, refer to the dimension table of the SE model. * For details of the pulley idler, refer to Options on page 19. Unit [mm] Ordering Information Size The latest CAD data can be downloaded from our website. ht t p: //w w w. m ikipulley.co.jp/ C A D The CAD mark indicates that CAD data is available by CD-ROM. The CAD file No. represents the file name in the CD-ROM. 17

ROSTA TENSIONER NSE MODEL Specification NSE-15 NSE-18 NSE-27 NSE-38 NSE-45 Model Load range F [N] Maximum displacement S1 [mm] Maximum displacement S2 [mm] Applicable chain Mass [kg] -35S 0.

10 ROSTA TENSIONER NSE MODEL Specification NSE-15 NSE-18 NSE-27 NSE-38 NSE-45 Model Load range F [N] Maximum displacement S1 [mm] Maximum displacement S2 [mm] Applicable chain Mass [kg] -35S ~ D S D ~ S D S D 2.5 0~ S D S 4.5 0~ D S D 9.4 0~ S D 10.9 * Load range is for the normal position specification. Hard position load range 1.25 Normal position load range. Dimension M2 S1 (normal) C A D Y U F H1 B F D L3 G A M Unit [mm] NSE-15 NSE-18 NSE-27 NSE-38 NSE-45 Model A B D G H1 L3 U Y adjustment range -35S D S D S D S D S D S D S D S D * For detailed dimensions of the tensioner part, refer to the dimension table of the SE model. * The symbol "S" at the end of the size indicates a single row of sprocket, and "D" indicates two rows of sprockets. * For details of the sprocket idler, refer to Options on page 19. M M2 CAD file No. M8 25 M10 55 NSE1 M10 30 M10 55 NSE2 M12 40 M12 80 NSE3 M16 40 M NSE4 M20 50 M NSE5 Ordering Information Size Sprocket nominal designation 18

ROSTA TENSIONER Options Idler/Bracket Pulley Idler RA Model D A C B L1 d E d1 Model A B C D d d1 E L1 Bearing RA-11 13 7 9 30 8 12 3 35 608 ZZ RA-15/18 16 9 13 40 10 15 6 45 6200 ZZ RA-27 22 12 16 60

11 ROSTA TENSIONER Options Idler/Bracket Pulley Idler RA Model D A C B L1 d E d1 Model A B C D d d1 E L1 Bearing RA ZZ RA-15/ ZZ RA ZZ RA ZZ RA ZZ * Fixing bolts and nuts for the pulley idler are accessories. * Material: Aluminum alloy. Unit [mm] Sprocket Idler N Model O.D P.D d1 d T B Single row: S N-15-35D O.D O.D P.D P.D DH DH d1 d1 d d N-38-80D L T T N D,120D B B B B L Double row: D Model O.D P.D B DH d d1 L T Teeth Bearing N-15-35S D N-18-40S D N-27-50S D S D N-38-80S D S D N S D Unit [mm] ZZ ZZ ZZ ZZ ZZ ZZ ZZ * Fixing bolts and nuts for the sprocket idler are accessories. * The symbol "S" at the end of the size indicates a single row of sprocket, and "D" indicates two rows of sprockets. Bracket WS/WD Model U J C A D C A D S T K D G H2 H1 A B E F C Unit [mm] Model Applicable tensioner A B C D E F G H1 H2 J K S T U CAD file No. WS-11/ WD-15 SE,RSE,NSE WD1 WS-15/ WD-18 SE,RSE,NSE WD2 WS-18/ WD-27 SE,RSE,NSE WD3 WS-27/ WD-38 SE,RSE,NSE WD4 WS-38/ WD-45 SE,RSE,NSE WD5 WS-45/ WD-50 SE,RSE,NSE WD6 The latest CAD data can be downloaded from our website. ht t p: //w w w. m ikipulley.co.jp/ C A D The CAD mark indicates that CAD data is available by CD-ROM. The CAD file No. represents the file name in the CD-ROM. 19

12 ROSTA TENSIONER Design Check Items Selection ò RSE Model Find the belt size, belt appropriate tension (required tension), and belt deflection angle q. Using the easy selection graph below, select the size from the intersection of the belt size or appropriate tension and the belt deflection angle q. The appropriate tension varies depending on the number of belts. ROSTA mounting angle is set to 15. ò NSE Model For chain transmission, no excessive initial tension is required on the chain because of the engagement with the sprocket. Therefore, the chain tensioner only needs to apply small tension sufficient to eliminate slack. Select the tensioner size appropriate for the chain size from the table below. In this case, the set angle of the tensioner should be 10 to 15. For a longer chain, consider the weight of the chain itself. Belt appropriate tension (required tension) [N] RSE-45 RSE-38 RSE-27 RSE-18 RSE-15 RSE-11 Chain size 35S 35S 35D 35D 40S 40D 50S 50D 60S 60D 80S 80D 100S 100D 120S 120D NSE size NSE-15-35S NSE-18-35S NSE-15-35D NSE-18-35D NSE-18-40S NSE-18-40D NSE-27-50S NSE-27-50D NSE-27-60S NSE-27-60D NSE-38-80S NSE-38-80D NSE S NSE D NSE S NSE D Belt angle for mounting the tensioner [ ] Reference Ls Dp dp C Dp: Large pulley diameter dp: Small pulley diameter C: Distance between shafts Lb: Length of the belt used T0: Belt appropriate tension (Dp+dp) Belt length:le=2c (Dp+dp) 2 4C Span length:ls= C 2 (Dp dp)2 4 Belt deflection:l=lb Le Belt angle: =2sin -1 Ls (Ls+L) Tensioner setting load:f=t0 cos( ) 2 20

13 Displacement S [mm] Load F [N] Spring Characteristics ò Torsional Angle - Load Curve 2000 SE F SE-38 SE SE SE SE Angle [ ] ò Torsional Angle - Displacement Conversion S SE-45 SE SE SE-15/18 SE Angle [ ] * Spring characteristics are normal position specifications. The latest CAD data can be downloaded from our website. ht t p: //w w w. m ikipulley.co.jp/ C A D The CAD mark indicates that CAD data is available by CD-ROM. The CAD file No. represents the file name in the CD-ROM. 21

14 ROSTA TENSIONER Design Check Items Idler Setting Installation Always set the idler on the deflection side of the chain/belt. For forward reverse rotation, set the idlers on both sides. Adjust the positioning notch on the flange part of the ROSTA tensioner to the designed position. Installation is made easily by placing a mark corresponding to the notch on the supporting plate on which the ROSTA tensioner is to be installed. This notch can also be used as a detent. To apply tension from the outside of the chain/belt, set the idler on the side of the smaller sprocket (pulley). On the other hand, to apply tension from the inside, set the idler on the side of the larger sprocket (pulley). Flange part Install the ROSTA tensioner on the machine using the attached hexagonal bolt (A). Check the strength of the machine installation part and flatness of the installation surface. If the ROSTA tensioner cannot be installed directly on the machine, use the bracket (WS/WD model). Set the chain tensioner so that three or more teeth of the sprocket idler are engaged with the chain. Excessive tension on the chain/belt dramatically shortens the life of the chain/belt as well as the life of the bearing. Allow appropriate looseness. As a guide, the setting angle is about 10 to 15. To apply tension from the inside of the V belt, use a V pulley idler. For a timing belt, use a timing idler. The tensioner mounting bolt has a strength category of 8.8. Tighten it with the following tightening torque. Bolt size Appropriate tightening torque [N m] M6 10 M8 25 M10 50 M12 90 M M Bracket Hexagonal boltl (A) Hold the outer shell of the ROSTA tensioner with a spanner, and tighten the attached hexagonal bolt (A) to secure the ROSTA tensioner. When the ROSTA tensioner is used with an angle close to its allowable angle, use a torque wrench to tighten it at the specified torque. Hexagonal bolt (A) Install the sprocket idler to the ROSTA tensioner. First, secure the supporting bolt (D) firmly to the arm with the retaining nut (B). After that, adjust the sprocket idler within the specified installation range (catalog Y dimensions) to align it with the travel path of the chain, and secure it with two nuts (C). Retaining nut (B) Supporting bolt (D) Arm Nut (C) Always set the idler on the inside of the arm. If it is necessary to set it on the outside of the arm, set it as close to the arm as possible. In this case, the allowable torsional angle is ±15 or less for the maximum. (Outside) (Inside) * Avoid oil or grease on the rubber (NR) because it has insufficient oil/grease resistance. 22

15 Tensioner 23

16 APPLICATION Motor Support Base Conveyor Centering Equipment Belt Cleaner Support Roller Suspension Cleaner Brush Suspension Carrier Roller Anti-Vibration 40

17 Segregator Support Vibration Motor Support Base See-Saw Support Crane Vibration Isolation and Sound Proofing Suspension Vibration Isolation & Sound Proofing 41

18 Safety Precautions (Please read prior to use) Please read carefully through the instruction manual and the technical information for proper use and safety. In this manual, safety precautions are classified into "DANGER" and "CAUTION". 2.Mounting precautions ò Tighten bolts or screws completely. When death or serious injury may result by mishandling Depending on the tightening adjustment of bolt or screw, exceptionally dangerous situations such as product damage or performance degradation could occur. Always use a calibrated torque wrench and clamp at the tightening torque specified by Miki Pulley. Tighten the bolts with the torque specified by the bolt manufacturer unless otherwise specified. When disability or only physical damage may result by mishandling Equipment use (atomic energy, aerospace, medical treatment, transportation, or various safety devices) that may result in serious bodily injury or loss of life directly by mechanical failure or mishandling, careful examination is necessary. Contact us for further information. The company has taken all possible measures to produce a quality product; however, please pay attention to safety measures for the machine in case anything goes wrong. ò Do not turn on the power of the equipment. It is very dangerous if the driving part starts by accident while mounting the product. Be sure that the main power of the equipment is turned off. 1.Structural precautions ò Use a safety cover. Touching the product during operation could cause injury. Place a safety cover to avoid any accident. Additionally, set up a safety mechanism for quick stop of the product when opening the cover. ò Use the product within the specified maximum tolerance. The installation of the product must be performed within the specified maximum tolerance. Using the product with more than the maximum tolerance could cause damage or adverse effect on the equipment. ò D o n o t u s e t h e p r o d u c t i n a flammable or explosive atmosphere. The parts are supported by rubber. In some applications, they may become charged and produce sparks during discharge. Do not use the product near flammable liquids or in the presence of gas and other explosive air particles. ò Wear protective equipment. To avoid any injury during installation of the product, make sure to wear protective equipment such as safety glasses or gloves. ò Set up a safety mechanism. The driven and driving sides could be completely detached in case the product is damaged. Set up a safety mechanism such as a safety brake to avoid any danger. ò Carry and mount the product by using a hoist. Lifting of a heavy weight could cause back injury. Use a hoist when carrying or mounting the product. 42

19 3.Cautions during operation ò Do not touch the product during operation. Touching the product during operation may cause injury. Make sure not to touch the product during operation. 4.Cautions for maintenance and inspection ò Do not turn on the power of the equipment. It is extremely dangerous if the driving part starts operating by accident while dismounting the product. Make sure that the main power of the equipment is off. ò When abnormal noises or vibrations occur, stop operation immediately. If abnormal noises or vibrations occur during o p e r a tion, i m p r o p e r m o u nting s h o u l d b e considered. Do not leave the situation as it is. It may cause damage to the equipment itself. Also, for reasons other than above, the belts and other screws may loosen or become defective even if the product is mounted correctly. ò Do not dismantle the product. We will refuse to take responsibility as to the damaged product that is dismantled, remodeled or repaired by a third party except our company and the designated company. Therefore, for the product that the assembly process or procedure of dismantlement is described in the manual, we will not be responsible as well. Please use our service network for repair and dismantlement. ò Do not use the product in an environment that could cause harmful effects. Do not use the product in an environment where chemicals may spill, humidity is high, or temperature is too high or too low. 5.Cautions for disposal ò Do not leave the product around where young children may play. ò Ask a waste-control-collection company for disposal. ò O p e r a t e t h e p r o d u c t w i t h i n t h e "maximum permissible torsional angle." Using the product outside the "ma ximum permissible torsional angle" may damage the product or have harmful effects on the equipment. Always operate the product within the specified "maximum permissible torsional angle." Please note that this safety precautions and specification described in each manual may be changed without prior notice. Contact Miki Pulley for additional information or questions on these precautions. ò Operate the product within the "permissible loading force." Using the product outside the "permissible loading force" may damage the product or have harmful effects on the equipment. Always operate the product within the specified "permissible loading force." ò Operate the product within the specified maximum permissible misalignment. Using the product outside the "ma ximum permissible misalignment" may damage the product or have harmful effects on the equipment. Always operate the product within the specified "maximum permissible misalignment." 43

events such as tradeshows 01 Multilingual

Chinese (simplified characters) and Korean.

information including a catalog, instruction

05 Instruction manual PDF page 04 Catalog

for introduction of products 03 Enriched

20 Please Consult Our Website. More information on new products and on events such as tradeshows 01 Multilingual website (4 languages) Japanese, English, Chinese (simplified characters) and Korean. *Some product information is available in Japanese only. 01 Top page 02 Downloading Latest information including a catalog, instruction manual and CAD data can be downloaded. 05 Instruction manual PDF page 04 Catalog PDF page 03 Product information page 02 Page for introduction of products 03 Enriched content Abundant information other than product information is also provided. 08 International network information page 07 Tradeshow information page 06 A d v e r t i s e m e n t a n d s e l f - introduction page 44

21 All Kinds of Mikipulley's Products. Motion control and power transmission equipment Flexible Couplings Speed changers and Reducers Suspension/Rotation Speed Indicators Inverters/ DD Motors Electoromagnetic Clutches and Brakes ETP Bushings 45

22 461 Imai-Minami-cho, Nakahara-Ku, Kawasaki-Shi, Kanagawa-Ken, , Japan ' SO-RST(en)-001A

Product Range Modules ROSTA Tensioner Devices

Product Range Modules ROSTA Tensioner Devices Product Range Modules ROSTA Page 17 14 Tensioning Technology Chain Tensioning Roller chains are power transmission components with positive transmission which, by virtue of their design are subject, depending