Tentering setting machine for leather base cloth production

Abstract

The invention relates to a tentering setting machine for leather base cloth production, and relates to the technical field of leather base cloth processing. The tentering setting machine for leather base cloth production comprises a machine body, tentering mechanisms are arranged on the two sides of the machine body, each tentering mechanism comprises a chain and a chain wheel, each tentering mechanism further comprises a driving piece and a plurality of clamping assemblies, each clamping assembly comprises an installation frame and a plurality of clamping plates, and the clamping plates are arranged on the installation frames. Each mounting frame is arranged on the chain, the clamping plates are used for being located on the two sides of leather base cloth respectively and are in sliding connection with the corresponding mounting frames, and the driving part is used for driving each corresponding clamping plate to slide, so that the clamping plates clamp the leather base cloth. The tentering device has the effect of reducing the probability that the leather base cloth is damaged in the tentering process.

Description

Technical Field

[0001] The present application relates to the technical field of leather base fabric processing, and in particular to a stentering and setting machine for leather base fabric production. Background Art

[0002] A stentering machine is a device used for stretching and shaping knitted fabrics, nonwovens, fur, leather and other fabrics. It can use mechanical force to stretch fabrics that have been subjected to external forces during production and processing, resulting in radial elongation and weft contraction, and correct the uneven width of the fabric. Therefore, it plays an important role.

[0003] The prior art provides a stenter setting machine for leather base fabric production, comprising a machine body and a heating mechanism. The machine body is also provided with two stentering mechanisms, one located on either side of the machine body. Each stentering mechanism comprises a chain sprocket assembly and a plurality of stentering pin plates. The chain sprocket assembly is mounted on the machine body and causes the plurality of transmission chains within the chain to move in a closed loop. The plurality of stentering pin plates are mounted on different transmission chains and are each provided with a positioning pin, each of which is configured to be inserted into a hole at the side end of the leather base fabric. During use, the positioning pins on the stentering pin plates are inserted into the holes at the side end of the leather base fabric, causing the leather base fabric to be stenter-set by the stentering pin plates. The leather base fabric then moves with the stentering pin plates into the machine body, where it is heated by the heating mechanism within the machine body and thus heat-set.

[0004] Regarding the above-mentioned related technologies, since the positioning needles on each stretching needle plate need to be inserted into the holes at the side ends of the leather base cloth when the leather base cloth is stretched, when the holes at the side ends of the leather base cloth are opened incompletely or misplaced in the previous processing steps, it is easy for some of the positioning needles on the stretching needle plate to pierce the leather base cloth, which can easily cause the leather base cloth to tear during the stretching process, which reduces the processing effect of the leather base cloth, so it needs to be improved. Summary of the Invention

[0005] In order to reduce the probability of damage to the leather base cloth during the stretching process, the present application provides a stretching and setting machine for leather base cloth production.

[0006] The present application provides a stentering machine for leather base fabric production, which adopts the following technical solution: A tentering and setting machine for leather base cloth production includes a machine body, and tentering mechanisms are provided on both sides of the machine body. The tentering mechanisms include chains and sprockets. The tentering mechanisms also include a driving member and a number of clamping assemblies. Each of the clamping assemblies includes a mounting frame and a number of clamping plates. Each of the mounting frames is provided on the chain. The several clamping plates are used to be respectively located on both sides of the leather base cloth and are slidably connected to the corresponding mounting frames. The driving member is used to drive each corresponding clamping plate to slide, so that the clamping plate clamps the leather base cloth.

[0007] By adopting the above technical solution, compared with the prior art, the leather base cloth is stretched by inserting the positioning needles on the stretching needle plate into the holes at the side ends of the leather base cloth. When the holes at the side ends of the leather base cloth are opened incompletely or misplaced in the previous processing step, the positioning needles on some of the stretching needle plates are easy to pierce the leather base cloth, which can easily cause the leather base cloth to be damaged during the stretching process. The present application arranges the clamping assembly and the driving member so that when the clamping plate is driven by the driving member, the side ends of the transported leather base cloth are clamped, and the stretching and transportation of the leather base cloth is achieved by clamping, thereby replacing the prior art method in which the positioning needles are inserted into the holes on the leather base cloth, and the leather base cloth is difficult to be pierced by the clamping plate, thereby reducing the chance of the leather base cloth being torn during the stretching process due to puncture, reducing the chance of damage to the leather base cloth, and ensuring the processing effect of the leather base cloth.

[0008] Preferably, each of the clamping plates is provided with a giving way mechanism, and each of the giving way mechanisms includes a giving way frame and a giving way assembly, one end of each of the giving way frames is rotatably connected to the corresponding clamping plate, and the other end is located outside the corresponding clamping plate, and the leather base cloth is located on the displacement path when the corresponding giving way frame displaces together with the corresponding clamping plate, and the giving way assembly is used to drive the corresponding giving way frame to rotate.

[0009] By adopting the above technical solution, the setting of the yielding mechanism enables the relevant personnel to place the leather base cloth to be stretched in the machine body, and the yielding component can drive the yielding frame to rotate, so that the yielding frame is no longer located on the displacement path of the leather base cloth when the leather base cloth is placed, so that the relevant personnel can directly place the leather base cloth between the yielding frames, which effectively facilitates the operation of the relevant personnel and also effectively facilitates the subsequent collection of the leather base cloth after stretching.

[0010] Preferably, the yield assembly includes an active frame and a driven frame, the active frame is slidably connected to the corresponding clamping plate, one end of the driven frame is rotationally connected to the corresponding active frame, and the other end is rotationally connected to the corresponding yield frame, and a linkage member is further provided on the mounting frame, and the mounting frame drives the corresponding active frame to slide through the linkage member.

[0011] By adopting the above technical solution, the setting of the yielding assembly makes it possible that when the yielding frame needs to be driven to rotate, the linkage member can drive the active frame to slide, thereby causing the active frame to drive the driven frame to move, and then causing the driven frame to drive the active frame to slide, so that during the displacement of the clamping plate, the yielding frame is driven to rotate, thereby realizing the linkage between the clamping plate and the yielding frame, and facilitating the operation of relevant personnel.

[0012] Preferably, an abutment portion is extended from each of the active frames, and a guide surface is provided at one end of each abutment portion close to the leather base cloth. The linkage member includes a linkage frame, which is arranged on the corresponding mounting frame and is located on the displacement path of each corresponding abutment portion.

[0013] By adopting the above technical solution and arranging the linkage frame, when the clamping plate slides, the clamping plate can drive the active frame to move together, so that the abutting portion on the active frame abuts against the linkage frame on the mounting frame, thereby causing the active frame to slide, thereby realizing the linkage between the clamping plate and the yield frame, saving the driving device for driving the yield frame to rotate, and thus facilitating the operation of relevant personnel.

[0014] Preferably, each of the yielding components includes a reset member, and each of the reset members is used to restore the corresponding active frame to an initial position through its own elastic force.

[0015] By adopting the above technical solution and setting the reset member, the reset member can use its own elastic force to allow the active frame to return to its initial position, so that when the abutting portion on the active frame no longer abuts against the linkage frame, it can return to its initial position, thereby realizing automatic reset of the yield frame.

[0016] Preferably, two of the retracting frames are provided on each of the clamping plates, and the two retracting frames are respectively located on both sides of the corresponding clamping plate and on the same side of the leather base cloth.

[0017] By adopting the above technical solution, the setting of two giving way racks effectively increases the contact area between the overall giving way rack and the leather base cloth, thereby ensuring the clamping effect and stretching effect of the leather base cloth. At the same time, it also reduces the rotation angle required for the giving way rack to give way to the leather base cloth, thereby facilitating the setting of the giving way rack.

[0018] Preferably, the clamping assembly further includes a sliding frame and several transmission frames, the several transmission frames correspond to several corresponding clamping plates, the sliding frame is slidingly connected to the corresponding mounting frame, one end of each of the transmission frames is rotationally connected to the corresponding sliding frame, and the other end is rotationally connected to the corresponding clamping plate, and the driving member is used to drive the sliding frame to slide.

[0019] By adopting the above technical solution, the setting of the sliding frame and the transmission frame enables the driving member to slide by driving the sliding frame, so that the sliding frame drives the upper and lower clamping plates to approach the leather base cloth at the same time, changing the sliding direction required to be driven by the driving member, thereby facilitating the driving of the upper and lower clamping plates by the driving member and facilitating the setting of the driving member by relevant personnel.

[0020] Preferably, the driving member includes a driving slide rail, which is arranged in a closed loop and extends along the transmission direction of the chain. The top of the driving slide rail is protruding away from the leather base cloth. One end of each sliding frame extends into the corresponding driving slide rail and is against the inner wall of the corresponding driving slide rail.

[0021] By adopting the above technical solution, the driving slide rail is set so that when the sliding frame moves along the chain transmission direction with the mounting frame, when the sliding frame moves to the intersection of the top protrusion of the driving slide rail and the rest of the driving slide rail, the end of the sliding frame can adapt to the inner wall of the driving slide rail under the drive of the driving cavity, so that when the sliding frame slides to the intersection of the top protrusion of the driving slide rail and the rest of the driving slide rail, it can automatically slide and return to the initial position relative to the mounting frame under the abutment of the inner wall of the driving slide rail, and maintain the state after sliding in the middle part, thereby realizing the driving of each sliding frame, thereby replacing the active device required to drive each sliding frame.

[0022] Preferably, a spherical portion extends from one end of each sliding frame extending into the corresponding driving slide rail, and each of the spherical portions abuts against the inner wall of the corresponding driving slide rail.

[0023] By adopting the above technical solution and setting the spherical portion, the friction between the sliding frame and the inner wall of the driving slide rail can be effectively reduced, thereby reducing the wear of the sliding frame during sliding.

[0024] Preferably, the machine body is further provided with a plurality of abutment rollers, which are distributed along the length direction of the machine body and are all rotatably connected to the machine body, and the top of each abutment roller abuts against the bottom surface of the leather base cloth.

[0025] By adopting the above technical solution, the abutment roller is set so that during the stretching process of the leather base cloth, the abutment roller can effectively support the leather base cloth, thereby reducing the probability of the leather base cloth deviating downward under the action of its own gravity during the stretching process, thereby ensuring the stretching effect of the leather base cloth.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. The arrangement of the clamping assembly and the driving member enables the clamping plate to clamp the side ends of the transported leather base cloth under the drive of the driving member, thereby achieving the stretching and transportation of the leather base cloth, thereby replacing the method of inserting positioning needles into holes in the leather base cloth in the prior art. As a result, the leather base cloth is difficult to be punctured by the clamping plate, reducing the probability of the leather base cloth being torn during the stretching process due to puncture, reducing the probability of damage to the leather base cloth, and ensuring the processing effect of the leather base cloth; 2. The setting of the yielding mechanism enables the yielding assembly to drive the yielding frame to rotate when the relevant personnel need to place the leather base fabric to be stretched into the machine body, so that the yielding frame is no longer located in the displacement path of the leather base fabric when placing the leather base fabric, so that the relevant personnel can directly place the leather base fabric between the yielding frames, which effectively facilitates the operation of the relevant personnel and also effectively facilitates the subsequent collection of the leather base fabric after stretching; 3. The setting of the driving slide rail enables the sliding frame to move along the chain transmission direction together with the mounting frame. When the sliding frame moves to the intersection of the top protrusion of the driving slide rail and the rest of the driving slide rail, the end of the sliding frame can adapt to the inner wall of the driving slide rail under the drive of the driving cavity, so that when the sliding frame slides to the intersection of the top protrusion of the driving slide rail and the rest of the driving slide rail, it can automatically slide and return to the initial position relative to the mounting frame under the abutment of the inner wall of the driving slide rail, and maintain the state after sliding in the middle part, thereby realizing the driving of each sliding frame, thereby replacing the active device required to drive each sliding frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the entire stentering and setting machine for leather base fabric production in the embodiment of the present application.

[0028] Figure 2 It is a schematic diagram of the structure of the driving slide rail in the embodiment of the present application.

[0029] Figure 3 It is a structural diagram for reflecting the yield mechanism in the embodiment of the present application.

[0030] Figure 4 It is a schematic structural diagram for reflecting the driven frame in the embodiment of the present application.

[0031] Explanation of the accompanying reference numerals: 1. Machine body; 2. Stretching mechanism; 21. Chain; 22. Sprocket; 23. Driving member; 231. Driving slide rail; 24. Clamping assembly; 241. Mounting frame; 242. Clamping plate; 243. Sliding frame; 2431. Driving part; 2432. Spherical part; 244. Transmission frame; 3. Abutment roller; 4. Heating mechanism; 5. Rotating member; 6. Yielding mechanism; 61. Yielding frame; 62. Yielding assembly; 621. Active frame; 6211. Abutment part; 622. Driven frame; 623. Resetting member; 7. Linkage member; 71. Linkage frame. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-4 This application is described in further detail.

[0033] The present application discloses a stentering machine for producing leather base fabric. Figure 1 and Figure 2 A tentering machine for producing leather base fabrics includes a machine body 1, with tentering mechanisms 2 disposed on both sides of the machine body 1. Each tentering mechanism 2 includes a chain 21 and a sprocket 22. Each tentering mechanism 2 also includes a driving member 23 and a plurality of clamping assemblies 24. Each clamping assembly 24 includes a mounting frame 241 and a plurality of clamping plates 242. Each mounting frame 241 is disposed on the chain 21. The plurality of clamping plates 242 are respectively positioned on both sides of the leather base fabric and are slidably connected to the corresponding mounting frame 241. The driving member 23 is used to drive each corresponding clamping plate 242 to slide, thereby enabling the clamping plate 242 to clamp the leather base fabric.

[0034] Reference Figure 1 The machine body 1 is also provided with a plurality of abutment rollers 3, which are distributed along the length of the machine body 1. Both ends of each abutment roller 3 are rotatably connected to the machine body 1 via bearings. Each abutment roller 3 is located between the two tentering mechanisms 2. The machine body 1 is also provided with a heating mechanism 4. In the embodiment of the present application, the heating mechanism 4 is configured as a blower and a heater. The blower is used to draw air from the outside and pass it into the heater through a pipe. The heater is used to heat the incoming air and pass the heated air into the machine body 1, so that the heated air heats the portion of the leather base fabric located within the machine body 1.

[0035] Reference Figure 1 and Figure 2, the number of sprockets 22 in each tentering mechanism 2 is set to two, and the two sprockets 22 are respectively located at the two ends of the body 1 along the length direction. The two sprockets 22 located at the same end of the body 1 in the two tentering mechanisms 2 are both fixedly mounted on the same roller. A rotating member 5 is also provided on the body 1, and the rotating member 5 is used to drive one of the above-mentioned rollers to rotate. In the embodiment of the present application, the rotating member 5 is configured as a reduction motor, and the reduction motor is fixedly mounted on the side wall of the body 1, and the output shaft is fixedly connected to the end of the above-mentioned one of the rollers through a coupling.

[0036] Reference Figure 1 and Figure 2 Each chain 21 is mounted on two corresponding sprockets 22, so that the sprockets 22 drive the chains 21 in a closed-loop motion. Several mounting brackets 241 within each tenter mechanism 2 are bolted to the corresponding chain plates of the corresponding sprockets 22. Each mounting bracket 241 has two clamping plates 242, which are arranged one above the other to be positioned on the upper and lower sides of the leather base fabric.

[0037] Reference Figure 2 、 Figure 3 and Figure 4 Each clamping plate 242 is slidably connected to the corresponding mounting frame 241 via a slide rail, and the sliding direction is vertical. Each clamping assembly 24 also includes a sliding frame 243 and a plurality of transmission frames 244. In this embodiment, the transmission frames 244 are provided in two groups, each corresponding to the two clamping plates 242. The number of transmission frames 244 in each group is set to two, and they are located on opposite sides of the corresponding clamping plate 242.

[0038] Reference Figure 3 and Figure 4 One end of each transmission frame 244 is connected to the corresponding clamping plate 242 via a pin, and the other end is rotationally connected to the corresponding sliding frame 243 via a pin. Each sliding frame 243 is slidably connected to the corresponding mounting frame 241 via a slide rail, and the sliding direction is the length direction of the mounting frame 241. Each sliding frame 243 has a driving portion 2431 extending away from the leather base fabric, and each driving portion 2431 extends outside the sliding frame 243. A spherical portion 2432 extends from the portion of each driving portion 2431 away from the main body of the sliding frame 243, and the diameter of the spherical portion 2432 is larger than the diameter of the corresponding driving portion 2431.

[0039] Reference Figure 1 and Figure 2Each driving member 23 includes a driving rail 231. Each driving rail 231 is located on the side of the corresponding chain 21 away from the leather base fabric. Each driving rail 231 is fixedly mounted on the machine body 1. Each driving rail 231 is arranged in a closed loop and extends along the transmission direction of the corresponding chain 21. The top of each driving rail 231 is protruded away from the leather base fabric, so that the distance between this portion of the driving rail 231 and the corresponding chain 21 is greater than the distance between the remaining portion and the chain 21.

[0040] Reference Figure 2 and Figure 4 The spherical portion 2432 on each sliding frame 243 is embedded in the sliding groove of the corresponding driving slide rail 231, so that when the spherical portion 2432 on the sliding frame 243 moves together with the mounting frame 241 and the chain 21, when the spherical portion 2432 moves to a position where the top of the driving slide rail 231 protrudes away from the leather base cloth, it can drive the sliding frame 243 to slide relative to the mounting frame 241 under the abutment of the inner wall of the driving slide rail 231, thereby realizing automatic sliding of the sliding frame 243 and realizing the linkage between the mounting frame 241 and the clamping plate 242.

[0041] Reference Figure 2 、 Figure 3 and Figure 4 In the initial state, that is, when the spherical portion 2432 on the mounting frame 241 has not yet moved to the top protrusion of the driving rail 231, the two clamping plates 242 on the mounting frame 241 are separated from each other. When the spherical portion 2432 on the mounting frame 241 gradually moves to the junction of the top protrusion and the bottom portion of the driving rail 231, the inner wall of the driving rail 231 abuts against the spherical portion 2432 and the sliding frame 243, causing the spherical portion 2432 and the sliding frame 243 to slide relative to the mounting frame 241 in a direction away from the leather base fabric.

[0042] Reference Figure 2 、 Figure 3 and Figure 4 During this process, the sliding frame 243 causes each corresponding transmission frame 244 to shift and rotate relative to itself. At this point, the end of the transmission frame 244 away from the sliding frame 243 causes the corresponding clamping plate 242 to slide, bringing the two clamping plates 242 on the mounting frame 241 closer together. When the spherical portion 2432 disengages from the junction and fully moves to the protruding portion, the sliding frame 243, constrained by the drive rail 231, maintains its current position, allowing the two clamping plates 242 to continue to move closer together.

[0043] Reference Figure 3 and Figure 4Each clamping plate 242 is provided with a clearance mechanism 6, each of which comprises a clearance frame 61 and a clearance assembly 62. Two clearance frames 61 are provided on each clamping plate 242, one located on either side of the clamping plate 242 along the width direction of the mounting frame 241 and on the same side of the leather base fabric. One end of each clearance frame 61 is pivotally connected to the corresponding clamping plate 242 via a pin, and the other end extends to the side of the corresponding clamping plate 242 away from the mounting frame 241.

[0044] Reference Figure 3 and Figure 4 Each yield assembly 62 includes an active frame 621 and two driven frames 622, each corresponding to a yield frame 61. Each driven frame 622 is located on the side of the corresponding yield frame 61 away from the leather base fabric. One end of each driven frame 622 is pivotally connected to the corresponding yield frame 61 along its longitudinal midsection via a pin. The other end of each driven frame 622 is pivotally connected to the corresponding active frame 621 via a pin.

[0045] Reference Figure 3 and Figure 4 Each active frame 621 is slidably connected to a corresponding clamping plate 242 via a slide rail, and the sliding direction is the length direction of the mounting frame 241. An abutment portion 6211 extends from the side of each active frame 621 close to the leather base fabric, and a guide surface is formed on the end of each abutment portion 6211 close to the leather base fabric (i.e., the end away from the mounting frame 241).

[0046] Reference Figure 3 and Figure 4 Each mounting frame 241 is provided with a linkage member 7, each linkage member 7 including a linkage frame 71, and each linkage frame 71 is located between the two clamping plates 242 on the corresponding mounting frame 241. Each linkage frame 71 is integrally formed with the corresponding mounting frame 241 and is located on the displacement path of the corresponding abutment portion 6211 at one end of which the guide surface is formed.

[0047] Reference Figure 3 and Figure 4 Each yield assembly 62 further includes a reset member 623. In the embodiment of the present application, the reset member 623 is configured as a pressure spring. Each pressure spring is sleeved on the end of the corresponding active frame 621 away from the yield frame 61. One end of each pressure spring abuts against the corresponding active frame 621, and the other end abuts against the corresponding clamping plate 242.

[0048] Reference Figure 2 、 Figure 3 and Figure 4In the initial state, that is, the spherical portion 2432 on the mounting frame 241 has not moved to the top protrusion of the driving slide rail 231, so that when the two clamping plates 242 on the mounting frame 241 move away from each other, the two yielding frames 61 on each clamping plate 242 extend out of the clamping plate 242 and move away from each other. At this time, the active frame 621 is located at the end of its own sliding path away from the mounting frame 241.

[0049] Reference Figure 2 、 Figure 3 and Figure 4 When the spherical portion 2432 on the mounting frame 241 gradually moves to the intersection of the protruding portion and the bottom portion of the driving slide rail 231, causing the sliding frame 243 to slide, the two clamping plates 242 approach each other. During this process, the guide surface of the abutment portion 6211 on the active frame 621 abuts against the linkage frame 71, pushing the active frame 621 to slide away from the yielding frame 61. The active frame 621 drives the corresponding yielding frame 61 to rotate through the driven frame 622, causing the ends of the yielding frame 61 extending from the clamping plate 242 to approach each other, placing the leather base fabric on the displacement path of the rotated yielding frame 61, causing the yielding frame 61 to clamp the leather base fabric.

[0050] Reference Figure 3 and Figure 4 In the embodiment of the present application, a rubber anti-skid pad is fixedly glued to the side of each clearance rack 61 close to the leather base cloth to increase the friction between the leather base cloth and the clearance rack 61. In other embodiments, an insertion rod is provided on the side of each clearance rack 61 close to the leather base cloth, and each of the insertion rods is slidably connected to the corresponding clearance rack 61, and the sliding direction is the thickness direction of the leather base cloth, so that the insertion rod can be inserted into the hole at the edge of the leather base cloth. A pressure spring is provided at the end of each insertion rod to reset the insertion rod, so that the insertion rod can slide after contacting the surface of the leather base cloth, making way for the leather base cloth, thereby no longer piercing the leather base cloth.

[0051] The implementation principle of a tentering and setting machine for leather base fabric production according to an embodiment of the present application is as follows: when the leather base fabric needs to be tentered and set, the leather base fabric is placed at a specified position on the abutment roller 3 located at one end of the machine body 1. Thereafter, the sprocket 22 drives the chain 21 to transmit, causing the mounting frame 241 to move. As the mounting frame 241 moves along with the chain 21 and approaches the end of the leather base fabric, the spherical portion 2432 on the mounting frame 241 gradually moves to the intersection of the protruding portion at the top and the bottom portion of the driving slide rail 231. The inner wall of the driving slide rail 231 abuts against the spherical portion 2432 and the sliding frame 243, causing them to slide relative to the mounting frame 241 in a direction away from the leather base fabric.

[0052] At this time, the sliding frame 243 drives the corresponding clamping plate 242 to slide through the transmission frame 244, thereby approaching the leather base fabric. During this process, the guide surface of the abutment portion 6211 on the active frame 621 abuts against the linkage frame 71, thereby pushing the active frame 621 to slide away from the yielding frame 61, causing the active frame 621 to drive the corresponding yielding frame 61 to rotate through the driven frame 622, so that the end of the yielding frame 61 extending from the clamping plate 242 approaches, so that the leather base fabric is located in the displacement path of the yielding frame 61 after rotation, so that the yielding frame 61 clamps the leather base fabric after moving with the clamping plate 242.

[0053] Afterwards, the making way frame 61 and the clamping plate 242 drive the leather base cloth to move. During this process, the making way frames 61 on several mounting frames 241 on the chain 21 successively clamp the leather base cloth, thereby gradually sending the leather base cloth to the interior of the machine body 1 for heating, and achieving stretching in the process.

[0054] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A tentering machine for producing leather base fabrics, comprising a machine body (1), tentering mechanisms (2) being provided on both sides of the machine body (1), the tentering mechanisms (2) each comprising a chain (21) and a sprocket (22), characterized in that: The tentering mechanism (2) further includes a driving member (23) and a plurality of clamping assemblies (24), each of the clamping assemblies (24) includes a mounting frame (241) and a plurality of clamping plates (242), each of the mounting frames (241) is arranged on the chain (21), and the plurality of clamping plates (242) are respectively located on both sides of the leather base cloth and are slidably connected to the corresponding mounting frames (241), and the driving member (23) is used to drive each corresponding clamping plate (242) to slide, so that the clamping plate (242) clamps the leather base cloth.

2. The tentering machine for leather base fabric production according to claim 1, characterized in that: Each of the clamping plates (242) is provided with a yielding mechanism (6), and each of the yielding mechanisms (6) includes a yielding frame (61) and a yielding assembly (62). One end of each of the yielding frames (61) is rotatably connected to the corresponding clamping plate (242), and the other end is located outside the corresponding clamping plate (242). The leather base fabric is located on a displacement path when the corresponding yielding frame (61) moves together with the corresponding clamping plate (242). The yielding assembly (62) is used to drive the corresponding yielding frame (61) to rotate.

3. The tentering machine for leather base fabric production according to claim 2, characterized in that: The yielding assembly (62) includes an active frame (621) and a driven frame (622), wherein the active frame (621) is slidably connected to the corresponding clamping plate (242), one end of the driven frame (622) is rotationally connected to the corresponding active frame (621), and the other end is rotationally connected to the corresponding yielding frame (61), and a linkage member (7) is further provided on the mounting frame (241), and the mounting frame (241) drives the corresponding active frame (621) to slide through the linkage member (7).

4. The tentering machine for leather base fabric production according to claim 3, characterized in that: An abutment portion (6211) extends from each active frame (621), and a guide surface is provided at one end of each abutment portion (6211) close to the leather base cloth. The linkage member (7) includes a linkage frame (71), and the linkage frame (71) is arranged on the corresponding mounting frame (241) and is located on the displacement path of each corresponding abutment portion (6211).

5. The tentering machine for leather base fabric production according to claim 3, characterized in that: Each of the relinquishing components (62) includes a reset member (623), and each of the reset members (623) is used to restore the corresponding active frame (621) to an initial position through its own elastic force.

6. The tentering machine for leather base fabric production according to claim 2, characterized in that: Two of the relinquishing frames (61) are provided on each of the clamping plates (242), and the two relinquishing frames (61) are respectively located on both sides of the corresponding clamping plate (242) and are both located on the same side of the leather base cloth.

7. The tentering machine for leather base fabric production according to claim 1, characterized in that: The clamping assembly (24) further includes a sliding frame (243) and a plurality of transmission frames (244), wherein the plurality of transmission frames (244) correspond to a plurality of corresponding clamping plates (242), the sliding frame (243) is slidably connected to the corresponding mounting frame (241), one end of each transmission frame (244) is rotationally connected to the corresponding sliding frame (243), and the other end is rotationally connected to the corresponding clamping plate (242), and the driving member (23) is used to drive the sliding frame (243) to slide.

8. The tentering machine for leather base fabric production according to claim 7, characterized in that: The driving member (23) includes a driving slide rail (231), which is arranged in a closed loop and extends along the transmission direction of the chain (21). The top of the driving slide rail (231) is protruding in a direction away from the leather base cloth. One end of each of the sliding frames (243) extends into the corresponding driving slide rail (231) and abuts against the inner wall of the corresponding driving slide rail (231).

9. The tentering machine for leather base fabric production according to claim 8, characterized in that: A spherical portion (2432) extends from one end of each sliding frame (243) extending into the corresponding driving slide rail (231), and each spherical portion (2432) abuts against the inner wall of the corresponding driving slide rail (231).

10. The tentering machine for leather base fabric production according to claim 1, characterized in that: The machine body (1) is also provided with a plurality of abutment rollers (3), which are distributed along the length direction of the machine body (1) and are all rotatably connected to the machine body (1), and the top of each abutment roller (3) abuts against the bottom surface of the leather base cloth.

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