A chain clip with longitudinal contraction for a transverse stretching machine

Abstract

The invention discloses a chain clip with longitudinal contraction for a transverse stretching machine, which belongs to the technical field of film shaping devices and comprises a track and a plurality of clamping plates slidably mounted on the track, a clamping assembly for clamping a film is mounted on a side of the clamping plate away from the track, a convex rail is mounted on a side of the track close to the clamping plate, and a side of the convex rail away from the track is inclined; through the arranged adjustment block, when the clamping plate moves along the track, the adjustment block can be retained in a recessed portion on the convex rail, so that when the clamping plate moves to the vicinity of the recessed portion, the secondary bearing can cooperate with the adjustment block, thereby preventing the main bearing from moving toward the recessed portion, which is beneficial to ensuring that the tension on the film is continuously and stably increased.

Description

Technical Field

[0001] The invention relates to the technical field of film shaping devices, in particular to a longitudinally contracted chain clip for a transverse stretching machine. Background Art

[0002] Non-heat-shrinkable films must undergo shaping heat treatment after stretching. The heat treatment is generally carried out under a certain temperature and tension. After the transverse stretching is completed in the stretching zone of the transverse stretching machine, it enters the shaping zone to eliminate the internal stress of the film.

[0003] Chinese patent CN209466660U discloses a longitudinal relaxation mechanism for a biaxial stretching machine. By contracting and adjusting the active guide plate, the distance between the chain clip assemblies clamped on both sides of the film and located on the two circular tracks is changed. The longitudinal shrinkage rate can be reduced to a minimum while ensuring the lateral shrinkage rate of the film, thereby meeting customers' needs for high-quality products.

[0004] The above-mentioned device forces the chain clip to move by setting a shrinkage-adjusting active guide plate, thereby adjusting the distance between two adjacent clamping components, so as to change the pulling force on the film. However, in actual use, when there is a depression somewhere on the shrinkage-adjusting active guide plate, the chain clip will move toward the direction close to the track when moving to this place, causing the two chain clips to be briefly separated, so that the force on the film fluctuates, which is not conducive to the shaping of the film. In summary, the above-mentioned device still has room for improvement.

[0005] Therefore, it is necessary to provide a chain clip with longitudinal contraction for a transverse stretching machine to solve the above technical problems. Summary of the invention

[0006] The object of the present invention is to provide a chain clip with longitudinal contraction for a transverse stretching machine, so as to solve the problem that the existing device proposed in the above background technology causes the chain clip to be forced to move by setting a contraction adjustment active guide plate, thereby adjusting the distance between two adjacent clamping components, so as to change the pulling force on the film. However, in actual use, when there is a depression somewhere on the contraction adjustment active guide plate, the chain clip will move toward the direction close to the track when moving to this place, so that the two chain clips will be separated briefly, resulting in fluctuations in the force acting on the film.

[0007] Based on the above ideas, the present invention provides the following technical solutions: a chain clip with longitudinal contraction for a transverse stretching machine, comprising a track and a plurality of clamping plates slidably mounted on the track, a clamping assembly for clamping a film is installed on the side of the clamping plate away from the track, a convex rail is installed on the side of the track close to the clamping plate, a side of the convex rail away from the track is inclined, two groups of chain plates are arranged between two adjacent clamping plates, and a connecting shaft is installed at the intersection of the two groups of chain plates, one end of the chain plate away from the connecting shaft is rotatably matched with the clamping plate, a main bearing matched with the convex rail is fixedly sleeved on the connecting shaft, a telescopic assembly is fixedly installed on one of the clamping plates, and an adjustment assembly is installed on the end of the telescopic assembly close to the track;

[0008] When the main bearing moves to the depression on the convex rail, the clamping plates on both sides of the main bearing can move away from each other, so that the adjustment component is detached from the end of the telescopic component and retained on the convex rail. A secondary bearing that matches the adjustment component is fixedly sleeved on the connecting shaft. When the connecting shaft moves to the depression on the convex rail, the secondary bearing can contact with the retained adjustment component.

[0009] As a further solution of the present invention: the telescopic assembly includes a sleeve fixedly connected to the splint, a sliding rod is elastically installed in the sleeve, an electromagnet is fixedly arranged at the inner end surface of the sleeve, the sliding rod is made of iron, a support rod is rotatably installed at the end of the sliding rod away from the sleeve, a plurality of blocking blocks are elastically installed at the outer side of the support rod and at a position away from one end of the sliding rod, and the end of the blocking block away from the support rod is set as an inclined surface.

[0010] As a further solution of the present invention: the adjustment assembly includes an adjustment block arranged at the end of the support rod, the adjustment block is arranged in a "7" shape as a whole, the lower half of the adjustment block is arranged as a plug-in part, and the upper half of the adjustment block is provided with a mounting groove matching the support rod, the end of the support rod away from the sleeve is inserted into the mounting groove, and a clamping groove matching the clamping block is arranged on the inner wall of the mounting groove, and two plug rods are elastically installed at the bottom end of the plug-in part.

[0011] As a further solution of the present invention: an oblique groove is provided on the top surface of the convex rail, the oblique groove and the convex rail are parallel to each other, and a plurality of insertion holes matching with the insertion rods are evenly provided on the inner bottom surface of the oblique groove.

[0012] As a further solution of the present invention: the auxiliary bearing and the mounting groove are staggered in the horizontal plane.

[0013] As a further solution of the present invention: a first groove which is slidably matched with the insertion rod is formed at the bottom of the plug-in portion, and a first spring is fixedly arranged between the inner end surface of the first groove and the insertion rod.

[0014] As a further solution of the present invention: a guide block is fixedly installed between the head end of the convex rail and the track, and a side of the guide block away from the track is a curved surface.

[0015] As a further solution of the present invention: an inclined guide surface is provided at one end of the inclined groove close to the guide block.

[0016] As a further solution of the present invention: a limit strip is fixedly installed on one side of the top of the convex rail close to the track, and the limit strip is inclined on a side away from the track.

[0017] As a further solution of the present invention: a connecting rod and a rod sleeve are respectively provided on a splint with a sleeve and a splint adjacent to the splint, a notch is provided on the outer side of one end of the connecting rod extending into the rod sleeve, a sliding bar is slidably provided on the inner wall of the rod sleeve, one end of the sliding bar is inserted into the notch, a detection unit is installed on one side surface of the sliding bar, and the detection unit is connected to the electromagnet.

[0018] Compared with the prior art, the beneficial effect of the present invention is that: this device provides an adjustment block, and when the splint moves along the track, the adjustment block can be retained in the recessed portion on the convex rail, so that when the splint moves to the vicinity of the recessed portion, the secondary bearing can cooperate with the adjustment block, thereby preventing the main bearing from moving toward the recessed portion, which is beneficial to ensure that the tension on the film increases continuously and steadily. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a three-dimensional structural schematic diagram of the present invention;

[0022] Figure 3 It is a schematic diagram of the chain plate structure of the present invention;

[0023] Figure 4 The present invention Figure 2 A schematic diagram of the enlarged structure at point A;

[0024] Figure 5 It is a schematic diagram of the inclined slot and the jack structure of the present invention;

[0025] Figure 6 The present invention Figure 2 A schematic diagram of the enlarged structure at B;

[0026] Figure 7 It is a schematic diagram of the rod structure of the present invention;

[0027] Figure 8 It is a schematic diagram of the guide block structure of the present invention;

[0028] Fig. 9It is a schematic diagram of the structure of the slide rod and the sleeve of the present invention;

[0029] Fig.10 The present invention Fig. 9 A schematic diagram of the enlarged structure at C;

[0030] Fig.11 It is a schematic diagram of the coil spring structure of the present invention;

[0031] Fig.12 is a schematic diagram of the slide structure of the present invention;

[0032] Fig.13 It is a schematic diagram of the structure of the adjustment block of the present invention.

[0033] In the figure: 1, track; 2, clamping plate; 3, support seat; 4, chuck; 5, chain plate; 6, positioning bearing; 7, convex rail; 701, notch; 702, limit strip; 703, inclined groove; 704, plug hole; 705, guide surface; 706, positioning groove; 8, connecting shaft; 9, main bearing; 10, auxiliary bearing; 11, guide block; 12, adjustment block; 1201, plug rod; 1202, plug-in part; 13, sleeve; 14, support rod; 15, round shaft; 16, slide rod; 17, electromagnet; 18, coil spring; 19, connecting rod; 1901, notch; 20, rod sleeve; 2001, slide groove; 21, slide bar; 22, detection unit; 23, block; 2301, inclined surface. DETAILED DESCRIPTION

[0034] like Figure 1-Figure 6 As shown, a chain clip with longitudinal contraction for a transverse stretching machine comprises a track 1 and a clamping plate 2 slidably mounted on the track 1, a clamping assembly for clamping a film is installed on the side of the clamping plate 2 away from the track 1, and the film can be driven to move by sliding the clamping plate 2 on the track 1;

[0035] Furthermore, non-heat-shrinkable films must be subjected to shaping heat treatment after stretching. The heat treatment is generally carried out at a certain temperature and tension. After the transverse stretching is completed in the stretching zone of the transverse stretching machine, the film enters the shaping zone to eliminate the internal stress of the film. In this solution, a convex rail 7 is fixedly installed on the side of the track 1 close to the clamping plate 2 by bolts, and the side of the convex rail 7 away from the track 1 is inclined (specifically: refer to Figure 2 As shown, the height of the right end of the convex rail 7 relative to the track 1 is higher than the height of the left end of the convex rail 7 relative to the track 1);

[0036] Furthermore, in order to drive the clamping plate 2 to move on the track 1, the existing device usually chooses to connect the two clamping plates 2 through a chain structure, as shown in FIG. Figure 1-Figure 3As shown, two groups of chain plates 5 are arranged between the two clamping plates 2, one group of chain plates 5 is arranged on the inner side of the other group of chain plates 5, and a connecting shaft 8 is installed at the intersection of the two groups of chain plates 5, so that the chain plate 5 can rotate relative to the connecting shaft 8, and the end of the chain plate 5 away from the connecting shaft 8 is rotatably matched with the clamping plate 2. Specifically, a vertical shaft is rotatably arranged at the clamping plate 2, so that the vertical shaft passes through the chain plate 5 and rotates with it. In order to adjust the distance between the two clamping plates 2, this scheme has a main bearing 9 fixedly sleeved on the connecting shaft 8, and the main bearing 9 is on the same horizontal plane as the convex rail 7. In actual use, when the connecting shaft 8 moves to the convex rail 7, due to the inclined setting of the outer side surface of the convex rail 7, the convex rail 7 can squeeze the main bearing 9 on the outer side of the connecting shaft 8, thereby causing the connecting shaft 8 to gradually move away from the track 1. In this process, the clamping plates 2 on both sides of the connecting shaft 8 will gradually approach each other, which can further stretch the film and promote the film to be shaped. Of course, this structure is a commonly used structure in the film stretching device, and its specific working principle will not be repeated here.

[0037] In actual use, the cam rail 7 may be squeezed and rubbed during long-term use, which may cause depressions on the surface of the cam rail 7, or depressions may appear on the surface of the cam rail 7 due to transportation or production reasons, so that when the main bearing 9 moves to this depression, it will move toward the direction close to the track 1, so that the clamping plates 2 on both sides of the connecting shaft 8 will move away from each other, thereby causing the film to be subjected to force fluctuations during the shaping process. In order to solve this problem, the present scheme has a telescopic component fixedly installed on one of the clamping plates 2, and an adjustment component is installed on the end of the telescopic component close to the track 1. In actual use, when the main bearing 9 moves to the depression on the cam rail 7, the clamping plates 2 on both sides of the main bearing 9 can move away from each other, so that the adjustment component is detached from the end of the telescopic component and retained on the cam rail 7, and a secondary bearing 10 is also fixedly sleeved on the connecting shaft 8, and the secondary bearing 10 is located above the main bearing 9, so that when the connecting shaft 8 moves to the depression on the cam rail 7, the secondary bearing 10 can contact and cooperate with the adjustment component, so as to prevent the main bearing 9 from moving toward the direction close to the track 1.

[0038] like Figure 1-Figure 10 , Figure 12-13 As shown, the telescopic assembly includes a sleeve 13 fixedly connected to the clamp plate 2, the sleeve 13 is arranged on the side of the clamp plate 2 opposite to the track 1, a slide rod 16 is slidably arranged in the sleeve 13, an electromagnet 17 is fixedly arranged at the inner end surface of the sleeve 13, and a limit spring is fixedly arranged between the outer shell of the electromagnet 17 and the slide rod 16, for specific reference Fig. 9As shown, the slide bar 16 is made of iron. When the electromagnet 17 is in the energized state, the electromagnet 17 can use the suction force of the slide bar 16 to drive the slide bar 16 to retract into the sleeve 13. Of course, this is only one way to drive the slide bar 16 to move. In actual application, the sleeve 13 can also be replaced by a cylinder so that the telescopic end of the cylinder is connected to the slide bar 16.

[0039] Furthermore, the end of the slide rod 16 away from the sleeve 13 is rotatably mounted with the support rod 14, and the support rod 14 and the slide rod 16 are elastically matched, and a plurality of blocks 23 are elastically mounted on the outside of the support rod 14 and at one end away from the slide rod 16, and the end of the block 23 away from the support rod 14 is set as a slope 2301.

[0040] The adjustment assembly includes an adjustment block 12 disposed at the end of a support rod 14. Fig.13 As shown, the adjustment block 12 is configured as a "7" shape as a whole, the lower half of the adjustment block 12 is configured as a plug-in portion 1202, and a mounting groove matching with the support rod 14 is provided at the upper half of the adjustment block 12, so that the end of the support rod 14 away from the sleeve 13 can extend into the mounting groove, and a card slot matching with the card block 23 is provided at the inner wall of the mounting groove. When the card block 23 is in a pop-up state and inserted into the card slot, the card block 23 can be moved out of the card slot only when the force between the upper inclined surface 2301 of the card block 23 and the side edge of the card slot is large enough;

[0041] Further, refer to Figure 7 , Fig.13 As shown, two inserting rods 1201 are elastically mounted at the bottom end of the inserting portion 1202 .

[0042] In order to retain the adjustment block 12 on the convex rail 7, refer to Figure 5 As shown, an inclined groove 703 is provided on the top surface of the convex rail 7 , the inclined groove 703 and the convex rail 7 are parallel to each other, and a plurality of insertion holes 704 matching with the insertion rod 1201 are evenly provided on the inner bottom surface of the inclined groove 703 .

[0043] In order to detect whether there is a depression on the convex rail 7, this solution provides one of the embodiments. Specifically, the connecting rod 19 and the rod sleeve 20 can be fixed on the adjacent two clamping plates 2, respectively. Figure 1 , Fig.12As shown, a slot 1901 is provided on the outer side of one end of the connecting rod 19 extending into the rod sleeve 20, and a slide bar 21 is slidably provided on the inner wall of the rod sleeve 20, and one end of the slide bar 21 is inserted into the slot 1901, and a detection unit 22 is installed on one side surface of the slide bar 21. The detection unit 22 is electrically connected or signal-connected to the above-mentioned electromagnet 17. During specific operation, when the connecting rod 19 and the rod sleeve 20 are away from each other, the inner end surface of the slot 1901 will contact the detection unit 22, and when the connecting rod 19 and the rod sleeve 20 are close to each other, the detection unit 22 will not contact the inner wall of the slot 1901. Through this structure, the electromagnet 17 can be controlled.

[0044] In actual use, when the connecting shaft 8 moves to the convex rail 7, the pressure of the convex rail 7 on the main bearing 9 can drive the connecting shaft 8 away from the track 1, so that the clamping plates 2 on both sides of the connecting shaft 8 can be close to each other, which is conducive to the longitudinal stretching of the film. When the clamping plates 2 on both sides of the connecting shaft 8 are close to each other, the detection unit 22 on the slide bar 21 will be out of contact with the inner wall of the notch 1901, so that the electromagnet 17 is in a power-off state. At this time, the slide bar 16 will be in a pop-up state, so that the adjustment block 12 at the end of the support rod 14 will be in contact with the inclined groove 703. On the same vertical plane, as the main bearing 9 continues to move along the outer surface of the convex rail 7, the plug-in portion 1202 below the adjustment block 12 will move into the inclined groove 703. Since the inclined groove 703 is in an inclined state and parallel to the convex rail 7, the adjustment block 12 will squeeze the support rod 14 during the movement along the inclined groove 703, thereby causing the slide bar 16 to shrink into the sleeve 13. In this state, the plug-in rod 1201 at the bottom of the plug-in portion 1202 is in a staggered state with the insertion hole 704, so that the plug-in portion 1202 can move in the inclined groove 703;

[0045] When the main bearing 9 moves to the recessed portion on the convex rail 7, the main bearing 9 will move toward the direction close to the track 1, so that the clamping plates 2 on both sides of the main bearing 9 can approach each other, so that the connecting rod 19 shrinks into the rod sleeve 20. During this process, the detection unit 22 on the slide bar 21 will contact the inner wall of the notch 1901, thereby prompting the electromagnet 17 to be in an energized state, and the suction force of the electromagnet 17 on the slide bar 16 can drive the slide bar 16 to shrink into the sleeve 13. When the slide bar 16 shrinks, it can drive the plug-in part 1202 to move in the inclined groove 703 toward the direction close to the clamping plate 2, so that the plug-in rod 1201 on the plug-in part 1202 is aligned with the socket 704. When the plug-in rod 1201 is in a pop-up state and inserted into the socket 704, The adjusting block 12 and the convex rail 7 can be locked, and the outer side surfaces of the adjusting block 12 and the convex rail 7 are in a coplanar state. As the support rod 14 continues to move, the pressure between the inclined surface 2301 on the clamping block 23 and the side edge of the clamping groove increases, so that one end of the support rod 14 can be separated from the adjusting block 12. At this point, the support rod 14 is separated from the adjusting block 12 and the adjusting block 12 is retained on the convex rail 7. Since the adjusting block 12 is located above the recessed portion on the convex rail 7, when the subsequent connecting shaft 8 moves to this recessed portion, the secondary bearing 10 on the connecting shaft 8 will be located on the outside of the adjusting block 12 and contact it, thereby preventing the main bearing 9 from moving into the recessed portion, so that the tension on the film can be continuously and stably increased. After the shaping is completed, the staff can remove the convex rail 7 for maintenance.

[0046] Of course, the auxiliary bearing 10 and the above-mentioned installation groove are staggered in the horizontal plane, so as to avoid the auxiliary bearing 10 passing through the installation groove.

[0047] In summary, this device is provided with an adjustment block 12, and when the clamp plate 2 moves along the track 1, the adjustment block 12 can be retained in the recessed portion on the convex rail 7, so that when the clamp plate 2 moves to the vicinity of the recessed portion, the secondary bearing 10 can cooperate with the adjustment block 12, thereby preventing the main bearing 9 from moving toward the recessed portion, which is beneficial to ensure that the tension on the film continues to increase steadily.

[0048] like Figure 1-Figure 6 As shown, the track 1 is configured to be an I-shape, and the clamp plate 2 is configured to be U-shaped as a whole. Positioning bearings 6 are provided on both inner and outer sides, the top and the bottom of the track 1. The positioning bearings 6 are rotatably mounted on the clamp plate 2. Through this structure, the clamp plate 2 can slide stably on the track 1, and the chain plate 5 is located between the upper and lower sets of positioning bearings 6.

[0049] The above-mentioned clamping assembly includes a support seat 3 arranged on the side of the clamping plate 2 away from the track 1, the support seat 3 is fixedly connected to the clamping plate 2, and a clamp 4 is arranged above the support seat 3, the clamp 4 is hinged to the clamping plate 2, so that the clamp 4 can rotate relative to the clamp 2. Specifically, a protrusion that cooperates with the support seat 3 is arranged on the clamp 4. When the clamp 4 is rotated so that the protrusion on the clamp is on the support seat 3, the film can be clamped between the clamp 4 and the support seat 3. Of course, this is only one of the implementation methods of the clamping assembly. In actual use, it can also be fixed by bolts.

[0050] Reference Figure 2 As shown, in actual use, a notch 701 can be provided at the rear end of the convex rail 7, the notch 701 is connected to the inclined groove 703, and the above-mentioned plug hole 704 does not extend to the notch 701. Through this structure, when the clamping plate 2 is moved away from the convex rail 7, the adjacent clamping plates 2 will gradually separate, so that the electromagnet 17 is energized, and the adjustment block 12 at the end of the support rod 14 can be moved out of the notch 701. The above-mentioned detection unit 22 can be a switch or a pressure sensor, etc., which can activate the electromagnetic when it is pressurized. Iron 17, in addition to the above-mentioned method of setting the notch 701 to prompt the adjustment block 12 to move out of the convex rail 7, in actual application, a time relay can also be installed between the detection unit 22 and the electromagnet 17. When the clamping plate 2 moves out of the convex rail 7 for a period of time, the time relay can prompt the electromagnet 17 to be energized. At this time, the adjustment block 12 will move out of the inclined groove 703, so that the support rod 14 can be retracted into the sleeve 13. Of course, the specific circuit connection is a mature technical means in the electrical field and will not be elaborated here.

[0051] Reference Figure 4 As shown, a limit strip 702 can also be fixedly installed on the side of the top of the convex rail 7 close to the track 1, and the side of the limit strip 702 away from the track 1 is also inclined, so that the side of the limit strip 702 away from the track 1 is in the same plane as the inner wall of the inclined groove 703. Through this structure, when the adjustment block 12 moves into the inclined groove 703, the adjustment block 12 can be squeezed by the limit strip 702.

[0052] Reference Figure 5 As shown, in actual use, a positioning groove 706 can also be opened on the side of the inclined groove 703 close to the splint 2, and a positioning strip matching the positioning groove 706 is fixedly provided on the plug-in part 1202. When the plug-in part 1202 is pulled by the sliding rod 16 to move so that the plug rod 1201 is aligned with the socket 704, the positioning strip can be inserted into the positioning groove 706. The above-mentioned support rod 14 can be made of materials such as plastic or hard rubber.

[0053] Reference Figure 7As shown, a first groove for slidingly cooperating with the insertion rod 1201 is formed at the bottom of the plug-in portion 1202 , and a first spring is fixedly arranged between the inner end surface of the first groove and the insertion rod 1201 .

[0054] Reference Figure 8 As shown, a guide block 11 is fixedly installed between the head end of the convex rail 7 and the track 1, and the side of the guide block 11 away from the track 1 is an arc surface. This structure is conducive to the main bearing 9 to enter the convex rail 7 more smoothly. The end of the inclined groove 703 close to the guide block 11 is provided with an inclined guide surface 705. This structure is conducive to the insertion rod 1201 at the bottom of the plug-in part 1202 to enter the slot.

[0055] Reference Figure 9-11 As shown, the support rod 14 is provided with a second groove which is slidably matched with the clamping block 23 , and a spring is fixedly arranged between the inner end surface of the second groove and the clamping block 23 .

[0056] The end of the slide rod 16 is provided with an opening that matches the support rod 14, and a round shaft 15 is rotatably installed at the opening. The round shaft 15 passes through the support rod 14 and rotatably cooperates with it. The top wall and the bottom wall inside the opening are provided with mounting holes that match the round shaft 15, so that the round shaft 15 passes through the mounting holes and is rotatably connected to the slide rod 16. A coil spring 18 (or a torsion spring can be used instead) is sleeved at the top and bottom ends of the round shaft 15, and the two ends of the coil spring 18 are respectively fixedly connected to the outer wall of the round shaft 15 and the inner wall of the mounting hole.

[0057] Reference Fig.12 As shown, the inner wall of the sleeve rod is provided with a slide groove 2001 which slides with the slide bar 21. The cross-sections of the slide groove 2001 and the slide bar 21 are both "cross" shaped, and a rubber pad is fixedly bonded to the outer side of the slide bar 21 to increase the friction between the slide bar 21 and the slide groove 2001.

Claims

1. A chain clip with longitudinal contraction for a transverse stretching machine, comprising a track and a plurality of clamping plates slidably mounted on the track, a clamping assembly for clamping a film is installed on the side of the clamping plate away from the track, a convex track is installed on the side of the track close to the clamping plate, and the side of the convex track away from the track is inclined, two groups of chain plates are arranged between two adjacent clamping plates, and a connecting shaft is installed at the intersection of the two groups of chain plates, one end of the chain plate away from the connecting shaft is rotatably matched with the clamping plate, and a main bearing matched with the convex track is provided on the fixed sleeve on the connecting shaft, characterized in that: A telescopic component is fixedly installed on one of the clamping plates, and an adjustment component is installed on one end of the telescopic component close to the track; When the main bearing moves to the depression on the convex rail, the clamping plates on both sides of the main bearing can move away from each other, so that the adjustment component is detached from the end of the telescopic component and retained on the convex rail. A secondary bearing that matches the adjustment component is fixedly sleeved on the connecting shaft. When the connecting shaft moves to the depression on the convex rail, the secondary bearing can contact with the retained adjustment component.

2. A chain clip with longitudinal contraction for a transverse stretching machine according to claim 1, characterized in that: The telescopic assembly includes a sleeve fixedly connected to the splint, a sliding rod elastically installed in the sleeve, an electromagnet fixedly installed at the inner end surface of the sleeve, the sliding rod is made of iron, a support rod is rotatably installed at the end of the sliding rod away from the sleeve, and a plurality of blocking blocks are elastically installed at the outer side of the support rod and at a position away from one end of the sliding rod, and the end of the blocking block away from the support rod is set as an inclined surface.

3. A chain clip with longitudinal contraction for a transverse stretching machine according to claim 2, characterized in that: The adjustment assembly includes an adjustment block arranged at the end of the support rod, and the adjustment block is arranged in a "7" shape as a whole. The lower half of the adjustment block is arranged as a plug-in portion, and a mounting groove matching the support rod is provided at the upper half of the adjustment block. The end of the support rod away from the sleeve is inserted into the mounting groove, and a clamping groove matching the clamping block is provided at the inner wall of the mounting groove, and two plug rods are elastically installed at the bottom end of the plug-in portion.

4. A chain clip with longitudinal contraction for a transverse stretching machine according to claim 3, characterized in that: An oblique groove is provided on the top surface of the convex rail, the oblique groove and the convex rail are parallel to each other, and a plurality of insertion holes matched with the insertion rods are evenly provided on the inner bottom surface of the oblique groove.

5. The chain clip with longitudinal contraction for a transverse stretching machine according to claim 3, characterized in that: The auxiliary bearing and the mounting groove are staggered on a horizontal plane.

6. A chain clip with longitudinal contraction for a transverse stretching machine according to claim 3, characterized in that: The bottom of the plug-in portion is provided with a first groove which is slidably matched with the plug rod, and a first spring is fixedly arranged between the inner end surface of the first groove and the plug rod.

7. A chain clip with longitudinal contraction for a transverse stretching machine according to claim 4, characterized in that: A guide block is fixedly installed between the head end of the convex rail and the track, and a side of the guide block away from the track is an arc surface.

8. A chain clip with longitudinal contraction for a transverse stretching machine according to claim 7, characterized in that: An inclined guide surface is arranged at one end of the inclined slot close to the guide block.

9. A chain clip with longitudinal contraction for a transverse stretching machine according to claim 1, characterized in that: A limiting strip is fixedly installed on one side of the top of the convex rail close to the track, and a side of the limiting strip away from the track is inclined.

10. A chain clip with longitudinal contraction for a transverse stretching machine according to claim 2, characterized in that: A connecting rod and a rod sleeve are respectively provided on a splint with a sleeve installed and a splint adjacent to the splint. A slot is provided on the outer side of one end of the connecting rod extending into the rod sleeve. A sliding bar is slidably provided on the inner wall of the rod sleeve. One end of the sliding bar is inserted into the slot. A detection unit is installed on one side of the sliding bar, and the detection unit is connected to the electromagnet.

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