A corrugated paper flattening and forming device without glue

Abstract

This invention discloses a corrugated paper flattening and forming device without glue, comprising a first frame mounted on one side and a second frame mounted on the same side of the first frame. The first frame is equipped with a heating cylinder, and the second frame is equipped with a guide shaft. A first pressing roller is mounted on one side of the guide shaft, and a second pressing roller is mounted on the other side. A flat tube liner of corrugated paper is installed between the heating cylinder and the guide shaft. The first pressing roller, mounted on one side of the flat tube liner, cooperates with the heating cylinder to flatten one side of the flat tube liner; the second pressing roller, mounted on the other side of the flat tube liner, cooperates with the heating cylinder to flatten the other side of the flat tube liner. The flattened side is lower in height, making it impossible to apply glue. This invention provides a corrugated paper flattening and forming device without glue, which flattens the side edges of the corrugated paper flat tube liner, reducing the vertical height and preventing glue from being applied to the side edges, thus preventing glue overflow later.

Description

Technical Field

[0001] This invention relates to the field of corrugated paper processing and forming technology, and in particular to a non-adhesive-free corrugated paper flattening and forming device. Background Technology

[0002] Because corrugated paper has many advantages such as low production cost, light weight, and high compressive strength, it is often used for product packaging. In addition, waste corrugated paper is recyclable, making it an environmentally friendly packaging material.

[0003] The corrugated paper 9 includes a first facing layer 91, a flat tube liner 92, and a second facing layer 93. The first facing layer 91, the flat tube liner 92, and the second facing layer 93 are stacked sequentially. The flat tube liner 92 is coated with adhesive on both its top and bottom sides, respectively, to bond the first facing layer 91 and the second facing layer 93. After the flat tube liner 92 is glued by the gluing machine, adhesive is applied to both its top and bottom sides, and there is also adhesive on its side edges. After entering the double-sided bonding machine, the adhesive on the side edges overflows onto both sides of the paperboard. During paperboard conveying, some of the overflowing adhesive adheres to the working surfaces of the conveyor belt and the hot plate. This adhesive solidifies into small clumps. When the produced paperboard passes over these small, uneven clumps, the facing paper will be scratched, or the backing paper will be dented. The adhesive on the conveyor belt accelerates its wear and damage. If the adhesive adheres to the roller surface, it will cause the conveyor belt to deviate, accelerating conveyor belt wear. If glue can be prevented from overflowing at the edges of the cardboard, the lifespan of hot plates, conveyor belts, and rollers can be extended. Summary of the Invention

[0004] The purpose of this invention is to overcome the defect of side glue overflow in the prior art and provide a corrugated paper flattening and forming device that flattens the side edges of the inner lining of the corrugated paper flat tube, reduces the vertical height, and makes it impossible to apply glue to the side edges, thereby preventing side glue overflow in the later stage.

[0005] To achieve the above objectives, the present invention provides a corrugated paper non-adhesive flattening and forming device, comprising a first frame mounted on one side and a second frame mounted on the same side of the first frame. The first frame is equipped with a heating cylinder, and the second frame is equipped with a guide shaft. A first paper pressing roller is mounted on one side of the guide shaft, and a second paper pressing roller is mounted on the other side. A flat tube liner of corrugated paper is installed between the heating cylinder and the guide shaft. The first paper pressing roller is mounted on one side of the flat tube liner and cooperates with the heating cylinder to flatten one side of the flat tube liner. The second paper pressing roller is mounted on the other side of the flat tube liner and cooperates with the heating cylinder to flatten the other side of the flat tube liner. The height of the flattened side decreases, making it impossible to apply adhesive.

[0006] Preferably, one end of the guide shaft is equipped with a first stroke adjustment component for adjusting the stroke of the first paper pressing wheel, and the other end is equipped with a second stroke adjustment component for adjusting the stroke of the second paper pressing wheel. The first stroke adjustment component and the second stroke adjustment component cooperate with each other to adjust the distance between the first paper pressing wheel and the second paper pressing wheel.

[0007] Preferably, the first stroke adjustment assembly includes a first drive motor mounted on one end of the guide shaft and a first lead screw mounted on the end of the first drive motor. A first nut is sleeved on the first lead screw, and the first nut is connected to the first paper pressing wheel through a first connecting block. The second stroke adjustment assembly includes a second drive motor mounted on the other end of the guide shaft and a second lead screw mounted on the end of the second drive motor. A second nut is sleeved on the second lead screw, and the second nut is connected to the second paper pressing wheel through a second connecting block.

[0008] Preferably, the first lead screw and the second lead screw are installed inside the guide shaft, one end of the guide shaft is provided with a first straight groove, and the other end is provided with a second straight groove; the first connecting block and the second connecting block are both T-shaped and are respectively embedded in the first straight groove and the second straight groove, so that the first paper pressing wheel moves linearly along the first straight groove and the second paper pressing wheel moves linearly along the second straight groove.

[0009] Preferably, the surfaces of the first and second paper pressing rollers are provided with a plurality of shaped grooves; a first support ring is installed at the end of the first lead screw, and a second support ring is installed at the end of the second lead screw, both the first and second support rings being fixed inside the guide shaft; a plurality of limit switches for limiting the first and second paper pressing rollers are provided on the first frame.

[0010] Preferably, both ends of the guide shaft are equipped with distance adjustment components for adjusting the distance between the guide shaft and the heating cylinder. The distance adjustment components are mounted on the second frame and drive the guide shaft to move longitudinally in a straight line at their ends to adjust the distance between the guide shaft and the heating cylinder.

[0011] Preferably, the distance adjustment assembly includes a first linear drive component mounted on a second frame and a mounting plate mounted on the end of the first linear drive component. The end of the guide shaft is mounted on the mounting plate, and the first linear drive component drives the guide shaft to move longitudinally in a linear motion through the mounting plate.

[0012] Preferably, the first linear drive component is a drive cylinder, which is mounted on the second frame; a slider is mounted on the lower part of the mounting plate, the slider is sleeved on the slide rail, and the slide rail is mounted on the second frame; the drive cylinder drives the mounting plate to move linearly along the slide rail through the slider.

[0013] Preferably, a limiting bolt is installed on one side of the mounting plate, and the limiting bolt is mounted on the second frame. Rotating the limiting bolt adjusts the end limit of the mounting plate.

[0014] Preferably, the two sides of the first frame and the second frame are connected by an L-shaped fixing seat. One side of the L-shaped fixing seat is connected to the first frame, and the other side is connected to the second frame. The L-shaped fixing seat is provided with a first waist-shaped groove and a set screw block is installed at the bottom. The set screw block is fixed on the first frame and is provided with an adjusting bolt. The height between the second frame and the first frame is adjusted by rotating the adjusting bolt.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] This invention features a heating cylinder at the front and a guide shaft at the rear. A first paper-pressing roller is mounted on one side of the guide shaft, and a second paper-pressing roller is mounted on the other side. In use, the flat tube liner of corrugated paper is placed between the heating cylinder and the guide shaft. At this time, the first paper-pressing roller is mounted on one side of the flat tube liner, contacting that side; the second paper-pressing roller is mounted on the other side of the flat tube liner, contacting that side. The first paper-pressing roller, in conjunction with the heating cylinder, flattens one side of the flat tube liner; the second paper-pressing roller, in conjunction with the heating cylinder, flattens the other side of the flat tube liner. Since both sides of the flat tube liner are flattened, the side height decreases, reducing the vertical height. When applying glue to the gluer, the lower height on the left and right sides prevents glue from being applied, thus preventing glue overflow during later bonding. Furthermore, because the flattened portion has a certain width, it can also accommodate excess glue during the bonding process, further reducing glue overflow. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram showing the height variation of the inner flat tube lining inside the corrugated paper provided by the present invention;

[0019] Figure 2 This is a schematic diagram of the structure of a corrugated paper glue-free flattening and forming device provided by the present invention;

[0020] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0021] Figure 4 yes Figure 2Enlarged view of point B in the middle;

[0022] Figure 5 This is an enlarged schematic diagram of the right side of a corrugated paper glue-free flattening and forming device provided by the present invention;

[0023] Figure 6 This is a rear view of the first stroke adjustment component provided by the present invention;

[0024] Figure 7 This is a rear view of the second stroke adjustment component provided by the present invention;

[0025] Figure 8 This is a right view of a corrugated paper flattening and forming device without glue provided by the present invention.

[0026] The diagram includes:

[0027] 91. First surface layer; 93. Second surface layer; 1. First frame; 2. Second frame; 11. Heating cylinder; 21. Guide shaft; 22. First pressure roller; 23. Second pressure roller; 9. Corrugated paper; 92. Flat tube liner; 51. First stroke adjustment assembly; 52. Second stroke adjustment assembly; 511. First drive motor; 512. First lead screw; 513. First nut; 514. First connecting block; 521. Second drive motor; 522. Second lead screw 523. Second nut; 524. Second connecting block; 515. First linear groove; 525. Second linear groove; 221. Forming groove; 516. First support ring; 526. Second support ring; 29. ​​Limit switch; 4. Distance adjustment assembly; 41. First linear drive component; 42. Mounting plate; 43. Slider; 44. Slide rail; 45. Limit bolt; 3. L-shaped fixing seat; 31. First waist-shaped groove; 32. Ejector screw block; 33. Adjusting bolt. Detailed Implementation

[0028] The technical solution of this embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiment is one embodiment of the present invention, and not all embodiments thereof. Based on this embodiment of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Please refer to Figures 1 to 8 This invention provides a corrugated paper flattening and forming device without glue.

[0030] like Figure 1The corrugated paper 9 comprises a first surface layer 91, a flat tube liner 92, and a second surface layer 93 stacked sequentially. Normally, the flat tube liner 92 has equal internal height, with glue applied to the top and bottom sides, and excess glue overflowing from the left and right sides. In this embodiment, the flattening process flattens the left and right sides of the flat tube liner 92. Figure 1 As described below, the flattened part, due to its lower height, cannot be coated with glue, thus preventing glue from overflowing from the sides.

[0031] Furthermore, since the flattened portion has a certain width, it can also accommodate excess glue during the bonding process, further reducing glue overflow; later, the flattened portion is cut.

[0032] like Figure 2 As shown, the molding device includes a first frame 1 mounted on one side and a second frame 2 mounted on one side of the first frame 1. The first frame 1 and the second frame 2 are arranged front to back, and their relative height can be adjusted.

[0033] like Figure 2 As shown, the first frame 1 is equipped with a heating cylinder 11, and the second frame 2 is equipped with a guide shaft 21. A first paper-pressing roller 22 is mounted on one side of the guide shaft 21, and a second paper-pressing roller 23 is mounted on the other side. A flat tube liner 92 of corrugated paper 9 is installed between the heating cylinder 11 and the guide shaft 21. Correspondingly, the first paper-pressing roller 22 is mounted on one side of the flat tube liner 92, cooperating with the heating cylinder 11 to flatten one side of the flat tube liner 92; the second paper-pressing roller 23 is mounted on the other side of the flat tube liner 92, cooperating with the heating cylinder 11 to flatten the other side of the flat tube liner 92. Figure 1 As shown in the lower part, the side height of the flat tube liner 92 is reduced due to the flattening, making it impossible to apply glue during the glue application process.

[0034] like Figure 2 As shown, the distance between the first pressure roller 22 and the second pressure roller 23 can be adjusted to accommodate flat tube liners 92 of different widths. Specifically, one end of the guide shaft 21 is equipped with a first stroke adjustment component 51 for adjusting the stroke of the first pressure roller 22, and the other end is equipped with a second stroke adjustment component 52 for adjusting the stroke of the second pressure roller 23. The first stroke adjustment component 51 and the second stroke adjustment component 52 cooperate with each other to adjust the distance between the first pressure roller 22 and the second pressure roller 23.

[0035] The first stroke adjustment component 51 and the second stroke adjustment component 52 have the same structure and control the first paper pressing roller 22 and the second paper pressing roller 23 respectively.

[0036] like Figure 6As shown, the first stroke adjustment assembly 51 includes a first drive motor 511 mounted on one end of the guide shaft 21 and a first lead screw 512 mounted on the end of the first drive motor 511. A first nut 513 is sleeved on the first lead screw 512. The first nut 513 is connected to the first paper pressing roller 22 through a first connecting block 514. The first lead screw 512 and the first nut 513 combine to convert the rotational motion of the first drive motor 511 into a transverse linear motion. The first nut 513 is connected to the first paper pressing roller 22 through the first connecting block 514, thereby realizing the transverse movement of the first paper pressing roller 22 and thus achieving distance adjustment.

[0037] Similarly, such as Figure 7 As shown, the second stroke adjustment assembly 52 includes a second drive motor 521 mounted on the other end of the guide shaft 21 and a second lead screw 522 mounted on the end of the second drive motor 521. A second nut 523 is sleeved on the second lead screw 522. The second nut 523 is connected to the second paper pressing wheel 23 through a second connecting block 524. The combination of the second lead screw 522 and the second nut 523 converts the rotational motion of the second drive motor 521 into a transverse linear motion. The second nut 523 is connected to the second paper pressing wheel 23 through the second connecting block 524, thereby realizing the transverse movement of the second paper pressing wheel 23 and thus achieving distance adjustment.

[0038] like Figure 4 and Figure 5 As shown, the first lead screw 512 and the second lead screw 522 are installed inside the guide shaft 21. One end of the guide shaft 21 is provided with a first straight groove 515, and the other end is provided with a second straight groove 525. The first connecting block 514 and the second connecting block 524 are both T-shaped, and their lower parts are respectively embedded in the first straight groove 515 and the second straight groove 525, so that the first paper pressing wheel 22 moves linearly along the first straight groove 515, and the second paper pressing wheel 23 moves linearly along the second straight groove 525.

[0039] To better flatten the flat tube liner 92, the surfaces of the first pressing roller 22 and the second pressing roller 23 are provided with a plurality of forming grooves 221; the forming grooves 221 flatten the flat tube liner 92 and reduce the side height of the flat tube liner 92. Furthermore, the heating cylinder 11 can heat the flat tube liner 92 to facilitate rapid flattening and forming.

[0040] The distance between the first pressure roller 22 and the second pressure roller 23 can be automatically adjusted according to the trimming width of the slitting blade, adapting to different widths, and can also be automatically adjusted according to the paper width detected by the infrared grating system; the first drive motor 511 and the second drive motor 521 are servo motors, thereby precisely controlling the linear movement of the first pressure roller 22 and the second pressure roller 23; the PLC automatically controls the first drive motor 511 and the second drive motor 521. Furthermore, the first pressure roller 22 and the second pressure roller 23 are equipped with bearings inside, which can rotate with the flat tube liner 92, avoiding hard abrasion and damage to the flat tube liner 92. Figure 8 As shown, the power source of the flat tube liner 92 is not shown. Under the action of external driving force, the flat tube liner 92 is flattened by the first pressure roller 22 and the second pressure roller 23.

[0041] To maintain the stability of the linear motion of the first pressure roller 22 and the second pressure roller 23, such as Figure 6 and Figure 7 As shown, the first lead screw 512 is equipped with a first support ring 516 at its end, and the second lead screw 522 is equipped with a second support ring 526 at its end. Both the first support ring 516 and the second support ring 526 are fixed inside the guide shaft 21.

[0042] In order to perform soft limit control on the first pressure roller 22 and the second pressure roller 23, a number of limit switches 29 are provided on the first frame 1 to limit the first pressure roller 22 and the second pressure roller 23; there are four limit switches 29, two of which are located inside the first straight groove 515 to limit the first pressure roller 22; similarly, the remaining two are located inside the second straight groove 525 to limit the second pressure roller 23.

[0043] like Figure 2 As shown, both ends of the guide shaft 21 are equipped with distance adjustment components 4 for adjusting the distance between the guide shaft 21 and the heating cylinder 11. There are two distance adjustment components 4, which are installed on the second frame 2. The end drives the guide shaft 21 to move longitudinally in a straight line, adjusting the distance between it and the heating cylinder 11. This can flatten the two sides of the flat tube liner 92 to different heights, or increase the distance so that the flat tube liner 92 passes through when the equipment starts.

[0044] like Figure 5 As shown, the distance adjustment assembly 4 includes a first linear drive component 41 mounted on the second frame 2 and a mounting plate 42 mounted on the end of the first linear drive component 41. The end of the guide shaft 21 is mounted on the mounting plate 42, and the first linear drive component 41 drives the guide shaft 21 to move longitudinally in a linear motion through the mounting plate 42.

[0045] Furthermore, in this embodiment, the first linear drive component 41 is a drive cylinder, which is mounted on the second frame 2; in order to make the drive mounting plate 42 move more smoothly, a slider 43 is installed on the lower part of the mounting plate 42, the slider 43 is sleeved on the slide rail 44, and the slide rail 44 is mounted on the second frame 2; the drive cylinder drives the mounting plate 42 to move linearly along the slide rail 44 in the longitudinal direction through the slider 43.

[0046] Furthermore, such as Figure 5 As shown, as a hard limit for the distance adjustment component 4, a limit bolt 45 is installed on one side of the mounting plate 42. The limit bolt 45 is installed on the second frame 2, and the end limit of the mounting plate 42 is adjusted by rotating the limit bolt 45.

[0047] like Figure 3 As shown, the two sides of the first frame 1 and the second frame 2 are connected by L-shaped fixing seats 3. The relative height between the first frame 1 and the second frame 2 can be adjusted by adjusting the L-shaped fixing seats 3.

[0048] Specifically, the L-shaped fixing seat 3 is connected to the first frame 1 on one side and to the second frame 2 on the other side; the L-shaped fixing seat 3 is provided with a first waist-shaped groove 31 and a set screw block 32 is installed at the bottom; the set screw block 32 is fixed on the first frame 1, and the set screw block 32 is provided with an adjusting bolt 33, which can be rotated to adjust the height between the second frame 2 and the first frame 1.

[0049] The process of using the forming device is as follows: First, adjust the height between the second frame 2 and the first frame 1 to ensure that the heating cylinder 11 and the guide shaft 21 are at a suitable height. Specifically, rotate the adjusting bolt 33 to allow the L-shaped fixing seat 3 to move vertically to a suitable height. Second, control the distance between the first pressing roller 22 and the second pressing roller 23 to adapt to the width of the flat tube liner 92. The first drive motor 511 and the second drive motor 521 rotate to control the linear movement of the first pressing roller 22 and the second pressing roller 23, respectively. Third, rotate the limiting bolt 45 to adjust the end limit of the mounting plate 42, thereby adjusting the distance between the heating cylinder 11 and the guide shaft 21. This allows the flat tube to be... The inner liner 92 is flattened to different heights on both sides. Finally, the driving cylinder drives the mounting plate 42 to move backward, increasing the distance between the heating cylinder 11 and the guide shaft 21, allowing the flat tube inner liner 92 to pass through. The driving cylinder drives the mounting plate 42 to move forward, which is limited by the limiting bolt 45. The first paper pressing roller 22 is on one side of the flat tube inner liner 92, and the second paper pressing roller 23 is on the other side of the flat tube inner liner 92. The first paper pressing roller 22 cooperates with the heating cylinder 11 to flatten one side of the flat tube inner liner 92. The second paper pressing roller 23 cooperates with the heating cylinder 11 to flatten the other side of the flat tube inner liner 92. The height of the flattened side of the flat tube inner liner 92 decreases, making it impossible to apply glue later when applying glue in the glue applicator.

[0050] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. A corrugated paper flattening and forming device without glue, characterized in that: The system includes a first frame (1) mounted on one side and a second frame (2) mounted on the same side as the first frame (1). The first frame (1) is equipped with a heating cylinder (11), and the second frame (2) is equipped with a guide shaft (21). A first paper pressing wheel (22) is mounted on one side of the guide shaft (21), and a second paper pressing wheel (23) is mounted on the other side. A flat tube liner (92) of corrugated paper (9) is installed between the heating cylinder (11) and the guide shaft (21). The first paper pressing wheel (22) is mounted on one side of the flat tube liner (92) and cooperates with the heating cylinder (11) to flatten one side of the flat tube liner (92). The second paper pressing wheel (23) is mounted on the other side of the flat tube liner (92) and cooperates with the heating cylinder (11) to flatten the other side of the flat tube liner (92). The flattened side is lower in height and cannot be glued. One end of the guide shaft (21) is equipped with a first stroke adjustment component (51) for adjusting the stroke of the first paper pressing roller (22), and the other end is equipped with a second stroke adjustment component (52) for adjusting the stroke of the second paper pressing roller (23). The first stroke adjustment component (51) and the second stroke adjustment component (52) cooperate with each other to adjust the distance between the first paper pressing roller (22) and the second paper pressing roller (23). The first stroke adjustment assembly (51) includes a first drive motor (511) mounted on one end of the guide shaft (21) and a first lead screw (512) mounted on the end of the first drive motor (511). A first nut (513) is sleeved on the first lead screw (512), and the first nut (513) is connected to the first paper pressing wheel (22) through a first connecting block (514). The second stroke adjustment assembly (52) includes a second drive motor (521) mounted on the other end of the guide shaft (21) and a second lead screw (522) mounted on the end of the second drive motor (521). A second nut (523) is sleeved on the second lead screw (522), and the second nut (523) is connected to the second paper pressing wheel (23) through a second connecting block (524). The first lead screw (512) and the second lead screw (522) are installed inside the guide shaft (21). One end of the guide shaft (21) is provided with a first straight groove (515), and the other end is provided with a second straight groove (525). The first connecting block (514) and the second connecting block (524) are both T-shaped and are respectively embedded in the first straight groove (515) and the second straight groove (525), so that the first paper pressing wheel (22) moves linearly along the first straight groove (515), and the second paper pressing wheel (23) moves linearly along the second straight groove (525). The first paper pressing roller (22) and the second paper pressing roller (23) are provided with a plurality of forming grooves (221); the first lead screw (512) is provided with a first support ring (516) at the end, and the second lead screw (522) is provided with a second support ring (526) at the end, and the first support ring (516) and the second support ring (526) are both fixed inside the guide shaft (21); the first frame (1) is provided with a plurality of limit switches (29) for limiting the first paper pressing roller (22) and the second paper pressing roller (23); Both ends of the guide shaft (21) are equipped with distance adjustment components (4) for adjusting the distance between the guide shaft (21) and the heating cylinder (11). The distance adjustment components (4) are mounted on the second frame (2) and drive the guide shaft (21) to move longitudinally in a straight line at the end to adjust the distance between the guide shaft (21) and the heating cylinder (11). The first frame (1) and the second frame (2) are connected on both sides by an L-shaped fixing seat (3). The L-shaped fixing seat (3) is connected to the first frame (1) on one side and to the second frame (2) on the other side. The L-shaped fixing seat (3) is provided with a first waist-shaped groove (31) and a set screw block (32) is installed at the bottom. The set screw block (32) is fixed on the first frame (1). The set screw block (32) is provided with an adjusting bolt (33). Rotating the adjusting bolt (33) adjusts the height between the second frame (2) and the first frame (1).

2. The corrugated paper non-adhesive flattening and forming device according to claim 1, characterized in that: The distance adjustment assembly (4) includes a first linear drive component (41) mounted on the second frame (2) and a mounting plate (42) mounted on the end of the first linear drive component (41). The end of the guide shaft (21) is mounted on the mounting plate (42). The first linear drive component (41) drives the guide shaft (21) to move longitudinally in a straight line through the mounting plate (42).

3. The corrugated paper non-adhesive flattening and forming device according to claim 2, characterized in that: The first linear drive component (41) is a drive cylinder, which is mounted on the second frame (2); the lower part of the mounting plate (42) is equipped with a slider (43), the slider (43) is sleeved on the slide rail (44), and the slide rail (44) is mounted on the second frame (2); the drive cylinder drives the mounting plate (42) to move longitudinally along the slide rail (44) through the slider (43).

4. The corrugated paper non-adhesive flattening and forming device according to claim 2, characterized in that: A limiting bolt (45) is installed on one side of the mounting plate (42). The limiting bolt (45) is installed on the second frame (2). Rotating the limiting bolt (45) adjusts the end limit of the mounting plate (42).

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