CN207537643U - A kind of flood chaine constant tension control device - Google Patents

Abstract

The utility model discloses a kind of flood chaine constant tension control devices, several warping layer units on stent are equidistantly superposed including stent, linkage seat, warp let-off power plant and longitudinal direction, each warping layer unit includes the wire inlet mechanism, warp let-off bar, tension-detecting mechanism and the tension control mechanism that are horizontally installed on successively on stent, the warp let-off bar both ends of each warping layer unit are connect with linkage seat, and warp let-off power plant is arranged on stent and for linkage seat to be driven to move up and down；Warp thread enters from wire inlet mechanism and is clamped by wire inlet mechanism, and warp let-off bar is pressed on warp thread, and warp thread passes through tension-detecting mechanism and tension control mechanism enters loom, the tension of detection signal adjustment warp thread that tension control mechanism is sent out according to tension-detecting mechanism.The flood chaine constant tension control device of the utility model can effectively control in weaving process every layer of warp tension basically identical and keep constant tension, effectively improve fabric quality.

Description

A kind of flood chaine constant tension control device

Technical field

The utility model is related to field of textile equipment more particularly to a kind of flood chaine constant tension control devices.

Background technology

In recent years, since the performance of the composite material of three-dimensional woven fabric has been more than traditional metal material, and extensively should For every field.Three-dimensional woven fabric is in weaving process, if warp tension unevenness can impact the structure of fabric, from And influence its performance.The warp thread number of plies of general fabrics is less, and existing loom uses warp beam as warp tension controlling apparatus.But The three dimensional fabric warp thread number of plies is more, and in weaving, warp thread quantity is excessive, and the warp beam of existing loom is difficult every layer of warp tension of control Close to consistent, holding constant tension.

Therefore, the prior art has much room for improvement and develops.

Utility model content

The purpose of this utility model is to provide a kind of flood chaine constant tension control devices, it is intended to solve existing loom Warp tension controlling apparatus is difficult to control every layer of warp tension in weaving three-dimensional fabric close to unanimously, keeps the skill of constant tension Art problem.

The technical solution of the utility model is as follows：

A kind of flood chaine constant tension control device, wherein, including stent, linkage seat, warp let-off power plant and longitudinal direction etc. Away from several warping layer units being superposed on stent, each warping layer unit includes being horizontally installed on stent successively Wire inlet mechanism, warp let-off bar, tension-detecting mechanism and tension control mechanism, the warp let-off bar both ends of each warping layer unit with linkage Seat connection, warp let-off power plant are arranged on stent and for linkage seat to be driven to move up and down；Warp thread enters simultaneously from wire inlet mechanism It being clamped by wire inlet mechanism, warp let-off bar is pressed on warp thread, and warp thread passes through tension-detecting mechanism and tension control mechanism to enter loom, The tension of detection signal adjustment warp thread that power control mechanism is sent out according to tension-detecting mechanism.

The flood chaine constant tension control device, wherein, warp let-off power plant includes warp let-off electric rotating machine, gear passes Dynamic component and rack, rack are arranged in linkage seat, and warp let-off electric rotating machine is engaged by gear-driven assembly with rack, drive connection Dynamic seat moves up and down.

The flood chaine constant tension control device, wherein, gear-driven assembly includes pinion gear, connecting shaft and two Gear wheel；Pinion gear is connect with warp let-off electric rotating machine, and pinion gear is engaged with a gear wheel；Connect two gear wheels of axis connection simultaneously Parallel with warp let-off bar, rack sets two, engages respectively positioned at linkage seat both sides and with two gear wheels respectively.

The flood chaine constant tension control device, wherein, warp let-off guider is further included, warp let-off guider includes Line slide rail and sliding block, line slide rail are disposed longitudinally on stent, and sliding block is connect with linkage seat, and sliding block can be above and below line slide rail It slides.

The flood chaine constant tension control device, wherein, tension control mechanism includes controller, tension force rotates Motor, swing rod and Wirewinding roller, controller are electrically connected with tension force electric rotating machine, and swing rod one end connects with tension force electric rotating machine It connects, one end is connect with Wirewinding roller.

The flood chaine constant tension control device, wherein, tension control mechanism further includes outlet component, first leads Bar, the second guide rod, the first comb and the second comb, the first guide rod are arranged on before swing rod, and the first comb is arranged on first and leads Before bar, the second guide rod is arranged on behind Wirewinding roller, and the second comb is arranged on behind the second guide rod, the setting of outlet component Behind the second comb.

The flood chaine constant tension control device, wherein, tension-detecting mechanism include induction rod, sensing fixed seat and Pressure sensor, induction rod are connect with sensing fixed seat, and pressure sensor is arranged under junction, and pressure sensor and tension Control mechanism is electrically connected.

The flood chaine constant tension control device, wherein, tension-detecting mechanism further includes pressure pin fixed seat, the first support Bar and the second pressure pin, pressure pin fixed seat are arranged in sensing fixed seat, and the first pressure pin and the second pressure pin are arranged on pressure pin fixed seat Between, it is symmetrically arranged in the both sides of induction rod and higher than induction rod.

The flood chaine constant tension control device, wherein, wire inlet mechanism includes slide track seat, fixed roll and dynamic roller, sliding rail Seat is arranged on stent, and fixed roll and dynamic roller are arranged in parallel between slide track seat, and dynamic roller can slide up and down in slide track seat, warp thread quilt Fixed roll and dynamic roller clamp.

The flood chaine constant tension control device, wherein, dynamic roller moves roller, and surface is coated with one layer of rubber for stainless steel Glue.

The beneficial effects of the utility model：The flood chaine constant tension control device of the utility model passes through each section mechanism Cooperation, effectively control weaving process in every layer of warp tension it is basically identical and keep constant tension.In weaving process, every layer The dosage of warp thread is the same, and every warp thread can be kept to synchronize, so as to control every warp tension basically identical, preferably controlled The tension of warp thread entirety processed is consistent, and effectively improves fabric quality.The utility model apparatus structure is simple, easy to control, and Can corresponding warping layer unit quantity flexibly be set according to the warp thread number of plies of actual fabric, in practical applications very efficiently and It is convenient.In addition, the utility model device can record the warp tension value size in weaving process, auxiliary completes other looms Warp tension adjusts, and convenient for the fabric type according to different structure, changes warp tension, achieve the effect that fabric is best.

Description of the drawings

Fig. 1 is the overall schematic of flood chaine constant tension control device.

Fig. 2 is the structure diagram of the warping layer unit of the bottom.

Fig. 3 is enlarged drawing at B in Fig. 2.

Fig. 4 is enlarged drawing at C in Fig. 2.

Fig. 5 is enlarged drawing at A in Fig. 1.

Fig. 6 is enlarged drawing at D in Fig. 2.

Fig. 7 is enlarged drawing at E in Fig. 2.

Specific embodiment

The embodiment of the utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein Same or similar label represents same or similar element or the element with same or like function from beginning to end.Lead to below It crosses the embodiment being described with reference to the drawings to be exemplary, is only used for explaining the utility model, and it is not intended that this practicality Novel limitation.

In the description of the present invention, it is to be appreciated that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width Degree ", " thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer ", The orientation or position relationship of the instructions such as " clockwise ", " counterclockwise " be based on orientation shown in the drawings or position relationship, be only for Convenient for description the utility model and simplify description rather than instruction or imply signified device or element must have it is specific Orientation, with specific azimuth configuration and operation, therefore it is not intended that limitation to the utility model.In addition, term " first ", " second " is only used for description purpose, and it is not intended that indicating or implying relative importance or imply the technology indicated by indicating The quantity of feature." first " is defined as a result, the feature of " second " can be expressed or implicitly include one or more The feature." multiple " are meant that two or more in the description of the present invention, unless otherwise clearly specific It limits.

In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected or integrally Connection；Can be mechanically connected or be electrically connected or can mutually communicate；It can be directly connected, it can also be in Between medium be indirectly connected, can be the interaction relationship of connection inside two elements or two elements.For this field For those of ordinary skill, concrete meaning of the above-mentioned term in the utility model can be understood as the case may be.

In the utility model unless specifically defined or limited otherwise, fisrt feature second feature it " on " or it " under " can be in direct contact including the first and second features, it is not to be in direct contact but lead to that can also include the first and second features Cross the other characterisation contact between them.Moreover, fisrt feature second feature " on ", " top " and " above " including One feature is right over second feature and oblique upper or is merely representative of fisrt feature level height higher than second feature.First is special Sign second feature " under ", " lower section " and " below " including fisrt feature immediately below second feature and obliquely downward or only Represent that fisrt feature level height is less than second feature.

Following disclosure provides many different embodiments or example is used for realizing the different structure of the utility model. In order to simplify the disclosure of the utility model, hereinafter the component of specific examples and setting are described.Certainly, they are only Example, and purpose does not lie in limitation the utility model.In addition, the utility model can in different examples repeat reference numerals And/or reference letter, this repetition are for purposes of simplicity and clarity, itself not indicate discussed various embodiments And/or the relationship between setting.In addition, various specific techniques and the example of material that the utility model provides, but this Field those of ordinary skill can be appreciated that the application of other techniques and/or the use of other materials.

Fig. 1 is please referred to, Fig. 1 is flood chaine constant tension control device schematic diagram.Flood chaine constant tension control device master To include stent 1, linkage seat 3, warp let-off power plant 4 and longitudinal direction and equidistantly be superposed several warping layer lists on stent 1 Member 2.Flood chaine constant tension control device shown in FIG. 1 for 25 groups of warping layer units 2 of setting can control 25 layers of warp simultaneously Yarn can increase and decrease the number of plies of warping layer unit 2 as needed in actual use.Referring to Fig. 2, shown in Fig. 2 is one layer of bottommost The structure diagram of warping layer unit 2, each warping layer unit 2 include being horizontally installed on successively wire inlet mechanism 5 on stent 1, Warp let-off bar 6, tension-detecting mechanism 7 and tension control mechanism 8,6 both ends of warp let-off bar of each warping layer unit 2 with linkage seat 3 Connection, warp let-off power plant 4 are arranged on stent 1 and for linkage seat 3 to be driven to move up and down.Warp thread enters from wire inlet mechanism 5 And clamped by wire inlet mechanism 5, warp let-off bar 6 is pressed on warp thread, and warp thread passes through tension-detecting mechanism 7 and tension control mechanism 8 to enter Loom, the tension of detection signal adjustment warp thread that tension control mechanism 8 is sent out according to tension-detecting mechanism 7.In actual work, will Every warp thread synchronization in one layer of warp thread sequentially passes through wire inlet mechanism 5, warp let-off bar 6, tension-detecting mechanism 7 and tension control machine Loom is sent into after structure 8.Since wire inlet mechanism 5 clamps warp thread, an initial tension is provided equal to warp thread.Each layer of warp thread A corresponding warping layer unit 2 repeats aforesaid operations and arranges each layer of warp thread.During loom shedding, need one layer of warp thread Lift, formed and be open with other layer of warp thread, can changed by one layer of warp tension of shedding at this time.At the same time, tension is examined The tension variation value of warp thread can be detected, and feed back to tension force using tension variation value as detection signal in real time by surveying mechanism 7 Mechanism 8, tension control mechanism 8 can make a response according to detection signal, adjust warp tension, control every layer of warp tension close to one It causes.For loom when being crimped step, warp tension cannot be too big, otherwise influences curling.Therefore in curling, warp let-off power dress It puts 4 drive linkage seats 3 to move upwards, be moved upwards so as to which the warp let-off bar 6 for driving each warping layer unit 2 synchronizes, reduction pair The pressure of warp thread reduces warp tension.During this, tension-detecting mechanism 7 detects the tension variation value of warp thread in real time, and will open Power changing value feeds back to tension control mechanism 8 as detection signal, and tension control mechanism 8 can make a response according to detection signal, Warp tension is adjusted, controls every layer of warp tension close to consistent, holding constant tension.In conclusion the flood of the utility model Chaine constant tension control device effectively controls every layer of warp tension in weaving process basically identical by the cooperation of each section mechanism And keep constant tension.In weaving process, the dosage of every layer of warp thread is the same, and every warp thread can be kept to synchronize, so as to It controls every warp tension basically identical, preferably the tension of warp thread entirety is controlled to be consistent, effectively improve fabric quality.This Utility model apparatus structure is simple, easy to control, and can flexibly set corresponding warping according to the warp thread number of plies of actual fabric Layer unit quantity, in practical applications very efficiently and conveniently.In addition, the utility model device can be recorded in weaving process Warp tension value size, auxiliary complete the warp tension adjustment of other looms, and convenient for the fabric type according to different structure, change Become warp tension, achieve the effect that fabric is best.

Further, it is automated for the ease of realizing, referring to Fig. 2 and Fig. 3, warp let-off power plant 4 includes warp let-off electric rotating Machine 41, gear-driven assembly 42 and rack 43, rack 43 are arranged in linkage seat 3, and warp let-off electric rotating machine 41 passes through gear drive Component 42 is engaged with rack 43, and linkage seat 3 is driven to move up and down.Specifically, in order to make transmission more steady, gear-driven assembly 42 Including pinion gear 421, connecting shaft 422 and two gear wheels 423.Pinion gear 421 is connect with warp let-off electric rotating machine 41, pinion gear 421 engage with a gear wheel 423.Two gear wheels 423 of connection of connecting shaft 422 are simultaneously parallel with warp let-off bar 6.The setting of rack 43 two It is a, it engages respectively positioned at 3 both sides of linkage seat and with two gear wheels 423 respectively.In order to which connecting shaft 422 can be fixed preferably and work Make, two pressure pin beam pedestals 44 can be set at the both ends of connecting shaft 422, connecting shaft 422 is provided at both ends with rolling bearing, support Bearing fixed seat 45 is provided in bar beam pedestal 44, referring specifically to Fig. 4.Referring to Fig. 3, one side of pressure pin beam pedestal 44 is arranged side by side There is motor cabinet 46, hole is equipped among motor cabinet 46 makes the rotation axis of motor cabinet 46 stretch out and be connect with pinion gear 421, warp let-off rotation Motor 4 is fixed on motor cabinet 46, and gear wheel 423 is engaged with pinion gear 421 and rack 43, and gear wheel 423 passes through connecting shaft 422 It is synchronous with opposite side gear wheel 423 with bearing fixed seat.Since rack 43 and linkage seat 3 are not necessarily located in approximately the same plane, it is Rack 43 preferably connect with linkage seat 3 and is accurately driven, and can set rack fixing seat 47.Fig. 2 middle rack fixed seats 47 be L-type, and one side is connect with rack 43, is connect on one side with linkage seat 3.

Further, in order to make the up and down motion of linkage seat 3 more smooth and accurate, warp let-off guider 9 can also be set. Referring to Fig. 1 and Fig. 5, warp let-off guider 9 includes line slide rail 91 and sliding block 92, and line slide rail 91 is disposed longitudinally on stent 1, Sliding block 92 is connect with linkage seat 3, and sliding block 92 can be slided up and down in line slide rail 91.Linkage can be effectively ensured in warp let-off guider 9 The accuracy that seat 3 moves up and down.

Further, in order to simplify structure and facilitate adjust warp thread tension, also for facilitate realize automate, referring to figure 2 and Fig. 6, tension control mechanism 8 include controller（It is not drawn in figure）, tension force electric rotating, 81, swing rod 82 and Wirewinding roller 83.Controller is electrically connected with tension force electric rotating machine 81, and 82 one end of swing rod is connect with tension force electric rotating machine 81, one end with Wirewinding roller 83 connects.The rotation band driven fork 82 of tension force electric rotating machine 81, so as to which Wirewinding roller 83 is raised and lowered, you can subtract Small or increase warp tension.Specific swing rod 82 can be divided into the cross bar portion that is connect with tension force electric rotating machine 81 and perpendicular to horizontal stroke Bar, the montant portion being connect with Wirewinding roller 83, montant portion can pass through key connection with Wirewinding roller 83.Specifically, in order to make warp Arrangement is more reasonable, and tension control mechanism 8 further includes outlet component, the first guide rod 84, the second guide rod 85, the first comb 86 and the Two combs 87（See Fig. 4）.First guide rod 84 is arranged on before swing rod 82, before the first comb 86 is arranged on the first guide rod 84 Face, the second guide rod 85 are arranged on behind Wirewinding roller 83, and the second comb 87 is arranged on behind the second guide rod 85.Outlet component is set It puts behind the second comb 87, specifically includes outlet roller 88 and lower outlet roller 89.Warp thread is successively from the first guide rod 84, pressure It is passed through under line roller 83, on the second guide rod 85, between upper outlet roller 88 and lower outlet roller 89.First comb 86 and the second comb 87 are used In separating every warp thread, prevent every warp thread from winding each other.

Specifically, referring to Fig. 2 and Fig. 4, tension-detecting mechanism 7 includes induction rod 71, sensing fixed seat 72 and pressure sensing Device（It is not drawn in figure）, induction rod 71 with sensing fixed seat 72 connect, pressure sensor is arranged under junction, and pressure pass Sensor is electrically connected with tension control mechanism 8, and specifically forming closed loop with the controller of tension control mechanism 8 connect, so as to precisely Control warp tension size.Specifically, tension-detecting mechanism 7 further includes pressure pin fixed seat 73, the first pressure pin 74 and the second pressure pin 75, pressure pin fixed seat 73 is arranged in sensing fixed seat 72, and the first pressure pin 74 and the second pressure pin 75 are arranged on pressure pin fixed seat 73 Between, it is symmetrically arranged in the both sides of induction rod 71 and higher than induction rod 71.

Specifically, referring to Fig. 7, wire inlet mechanism 5 includes slide track seat 51, fixed roll 52 and dynamic roller 53, and slide track seat 51 is arranged on branch On frame 1, fixed roll 52 and dynamic roller 53 are arranged in parallel between slide track seat 51, and dynamic roller 53 can slide up and down in slide track seat 51, warp thread It is clamped by fixed roll 52 and dynamic roller 53, fixed roll 52 and dynamic roller 53 are adjustable to the clamping force of flood warp thread.Specifically, dynamic roller 53 is stainless Steel moves roller, and surface is coated with one layer of rubber, can increase the frictional resistance of dynamic roller 53, and a very big friction is generated to warp thread Power.51 upper end of slide track seat can also set compression spring briquetting 54, and the yarn clipping power of dynamic roller 53 is adjusted using compression spring briquetting 54.Inlet wire machine Comb 55 before structure 5 can also be set, for gaiting, prevent warp thread from winding.The tension adjustment of inlet wire part is to pass through adjusting The position of dynamic roller 53 and fixed roll 52 will be clamped in a suitable gap per one thread together, and a conjunction is generated to every warp thread Suitable tension, wherein needing the parallelism precision for ensureing to move roller 53 and fixed roll 52.When flood warp thread consumes, moving roller 53 will be by It is driven with the frictional force that flood warp thread generates, so as to complete the passive type warp let-off.

In order to which warp thread is made swimmingly to be driven, above-mentioned dynamic roller 53, warp let-off bar 6, the first pressure pin 74 and the second pressure pin 75, connecting shaft 422nd, Wirewinding roller 83, the first guide rod 84, the second guide rod 85 both ends rolling bearing can be set, and corresponding in fixed position Bearing fixed seat is set, this partly belongs to the installation that those skilled in the art can be completed according to the prior art, repeats no more.

In conclusion cooperation of the flood chaine constant tension control device of the utility model by each section mechanism, effectively Every layer of warp tension is basically identical in control weaving process and keeps constant tension.In weaving process, the dosage of every layer of warp thread It is the same, every warp thread can be kept to synchronize, so as to control every warp tension basically identical, preferably controls warp thread whole Tension be consistent, effectively improve fabric quality.The utility model apparatus structure is simple, easy to control, and can be according to reality The warp thread number of plies of border fabric flexibly sets corresponding warping layer unit quantity, in practical applications very efficiently and conveniently.In addition, The utility model device can record the warp tension value size in weaving process, and auxiliary completes the warp tension tune of other looms It is whole, and convenient for the fabric type according to different structure, change warp tension, achieve the effect that fabric is best.

In the description of this specification, reference term " embodiment ", " is schematically implemented " certain embodiments " The description of mode ", " example ", " specific example " or " some examples " etc. means with reference to the embodiment or example description Particular features, structures, materials, or characteristics are contained at least one embodiment or example of the utility model.In this explanation In book, schematic expression of the above terms are not necessarily referring to identical embodiment or example.Moreover, the specific spy of description Sign, structure, material or feature can in an appropriate manner combine in any one or more embodiments or example.

In conclusion although the utility model is disclosed above with preferred embodiment, above preferred embodiment is not used To limit the utility model, those of ordinary skill in the art without departing from the spirit and scope of the utility model, can make It is various to change and retouch, therefore the scope of protection of the utility model is subject to the range that claim defines.

Claims (10)

1. a kind of flood chaine constant tension control device, which is characterized in that including stent, linkage seat, warp let-off power plant and indulge To several warping layer units being equidistantly superposed on stent, each warping layer unit includes being horizontally installed on successively Wire inlet mechanism, warp let-off bar, tension-detecting mechanism and tension control mechanism on the stent, the described of each warping layer unit are sent It is connect through bar both ends with the linkage seat, the warp let-off power plant setting is on the bracket and for driving the linkage Seat moves up and down；Warp thread enters from the wire inlet mechanism and is clamped by the wire inlet mechanism, and the warp let-off bar is pressed on warp thread, warp Yarn passes through the tension-detecting mechanism and the tension control mechanism to enter loom, and the tension control mechanism is according to the tension The tension of detection signal adjustment warp thread that testing agency sends out.

2. flood chaine constant tension control device according to claim 1, which is characterized in that the warp let-off power plant packet Warp let-off electric rotating machine, gear-driven assembly and rack are included, the rack is arranged in the linkage seat, the warp let-off electric rotating machine It is engaged by the gear-driven assembly with the rack, the linkage seat is driven to move up and down.

3. flood chaine constant tension control device according to claim 2, which is characterized in that the gear-driven assembly packet Include pinion gear, connecting shaft and two gear wheels；The pinion gear is connect with the warp let-off electric rotating machine, the pinion gear with one The gear wheel engagement；Described connection two gear wheels of axis connection are simultaneously parallel with the warp let-off bar, the rack setting two It is a, it engages respectively positioned at the linkage seat both sides and with two gear wheels respectively.

4. flood chaine constant tension control device according to claim 1, which is characterized in that further include the warp let-off and be oriented to dress It puts, the warp let-off guider includes line slide rail and sliding block, and the line slide rail is longitudinally disposed on the bracket, the cunning Block is connect with the linkage seat, and the sliding block can be slided up and down in the line slide rail.

5. flood chaine constant tension control device according to claim 1, which is characterized in that the tension control mechanism packet Controller, tension force electric rotating machine, swing rod and Wirewinding roller are included, the controller is electrically connected with tension force electric rotating machine, institute It states swing rod one end to connect with the tension force electric rotating machine, one end is connect with the Wirewinding roller.

6. flood chaine constant tension control device according to claim 5, which is characterized in that the tension control mechanism is also Including outlet component, the first guide rod, the second guide rod, the first comb and the second comb, first guide rod is arranged on the swing rod Before, first comb is arranged on before first guide rod, after second guide rod is arranged on the Wirewinding roller Face, second comb are arranged on behind second guide rod, and the outlet component is arranged on behind second comb.

7. flood chaine constant tension control device according to claim 1, which is characterized in that the tension-detecting mechanism packet Induction rod, sensing fixed seat and pressure sensor are included, the induction rod is connect with the sensing fixed seat, the pressure sensor It is arranged under junction, and the pressure sensor is electrically connected with the tension control mechanism.

8. flood chaine constant tension control device according to claim 7, which is characterized in that the tension-detecting mechanism is also Including pressure pin fixed seat, the first pressure pin and the second pressure pin, the pressure pin fixed seat is arranged in the sensing fixed seat, and described the One pressure pin and the second pressure pin are arranged between the pressure pin fixed seat, are symmetrically arranged in the both sides of the induction rod and are higher than The induction rod.

9. flood chaine constant tension control device according to claim 1, which is characterized in that the wire inlet mechanism includes sliding Rail chair, fixed roll and dynamic roller, on the bracket, the fixed roll and dynamic roller are arranged in parallel in the slide track seat for the slide track seat setting Between, the dynamic roller can slide up and down in the slide track seat, and warp thread is clamped by the fixed roll and dynamic roller.

10. flood chaine constant tension control device according to claim 9, which is characterized in that the dynamic roller is stainless steel Dynamic roller, and surface is coated with one layer of rubber.