Frame bending device for signboard production

Abstract

The utility model discloses a frame bending device for signboard production, which belongs to the technical field of bending machines and comprises a bottom plate, the top of the bottom plate is connected with two sliding rails, the tops of the sliding rails are slidably connected with a sliding mechanism, the sliding mechanism comprises two second sliding blocks, one second sliding block is provided with a seventh groove, and the other second sliding block is provided with a third groove. The bottoms of the second sliding blocks are slidably connected with the top of the sliding rail, two second telescopic rods are connected between the two second sliding blocks, the second telescopic rods are sleeved with third springs, and the two ends of the third springs are connected with one sides of the two second sliding blocks correspondingly. And a second rotating handle rotates to drive a fourth round rod to move, the fourth round rod drives a third sliding block to move so as to be attached to a convex block to enable the convex block to rotate, the convex block drives a concave block to rotate and a second sliding block to move, therefore, angle adjustment is achieved, the signboard can be punched to form different angles, and the application range of the machine is widened.

Description

Technical Field

[0001] The utility model belongs to the technical field of bending machines, and particularly relates to a frame bending device for sign production. Background Art

[0002] A bending machine is a machine that can bend metal plates. Usually, the bending of metal plates is achieved by stamping the metal plates through the mutual cooperation between a folding knife and a die. During the production process of signs, it is necessary to bend them into shape and achieve different angles of bending according to different requirements. The bending angle of the existing bending machine is fixed and unchangeable. It is necessary to manually adjust or replace the die to achieve the bending angle, which is not convenient for operation and affects work efficiency. Moreover, the existing bending machine cannot be adjusted according to the size of the sign, and the adaptation range is limited. Content of the Utility Model

[0003] The purpose of the utility model is to provide a frame bending device for sign production, which is proposed to solve the problems that the existing technology cannot adjust the bending angle and cannot adjust the size according to the sign size.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A frame bending device for sign production, comprising a bottom plate. Two slide rails are connected to the top of the bottom plate, and a sliding mechanism is slidably connected to the top of the slide rails. The sliding mechanism includes two second sliders, and a seventh groove is formed in one of the second sliders. The bottom of the second slider is slidably connected to the top of the slide rail, and two second telescopic rods are connected between the two second sliders. A third spring is sleeved outside the second telescopic rod, and both ends of the third spring are connected to one side of the two second sliders respectively. Inside one side of the second slider near the top, a third round rod is connected. A concave block is rotatably connected to the outer wall of one of the third round rods, and a convex block is rotatably connected to the outer wall of the other third round rod. Both sides of the convex block are connected with second round rods, and the second round rods are rotatably connected to the concave block. A second lifting mechanism is arranged on the top of the bottom plate. The second lifting mechanism includes a third motor, a sixth fixing block and two semi-circular blocks. The bottom of the sixth fixing block is connected to the top of the bottom plate, and the bottom of the third motor is connected to the top of the bottom plate. The output shaft of the third motor is connected with a ratchet wheel, and a fifth round rod is connected to the bottom of the ratchet wheel near one side. A second rotating handle is rotatably connected to the outer wall of the fifth round rod, and a fourth round rod is rotatably connected to the inner wall of one end of the second rotating handle. One end of the fourth round rod is connected with a third slider. A moving groove is formed in the sixth fixing block, and the third slider slides on the moving groove. A fourth groove is formed in the middle of the top of the bottom plate, and the bottom of one of the semi-circular blocks is connected to the top of the fourth groove. A hinge seat is hinged to one side of the semi-circular block, and the same first telescopic rod is connected between the two hinge seats. A second spring is sleeved outside the first telescopic rod, and both ends of the second spring are connected to one side of the two hinge seats respectively. A pawl is connected to one side of the other semi-circular block, and the pawl is attached to one side of the ratchet wheel. A first round block is connected to one side of the pawl, and a sixth round rod is rotatably connected to the inner wall of the first round block. Both ends of the sixth round rod are connected to the inner wall of the fourth groove. As a further description of the above technical solution:

[0006] A first lifting mechanism is arranged on one side of the second slider. The first lifting mechanism includes a right-angled fixing plate, and the bottom of the right-angled fixing plate is connected to the top of the bottom plate. A second motor is connected to one side of the right-angled fixing plate, and the output shaft of the second motor is connected with a first rotating handle. A first round rod is rotatably connected to the inner wall of the first rotating handle, and a round block is connected to one end of the first round rod. A fourth fixing block is slidably connected to the outer wall of the round block. Two fifth fixing blocks are slidably connected to both sides of the fourth fixing block respectively, and the bottom of one side of the fifth fixing block is connected to one side of the bottom plate. A fourth fixing plate is connected to the top of the fourth fixing block, a folding knife is connected to the bottom of the fourth fixing plate, and a counterweight block is connected to the top of the fourth fixing plate near one side of the folding knife. As a further description of the above technical solution:

[0007] Two fixing mechanisms are arranged on both sides of the sliding rail close to the second slider. Each fixing mechanism includes two second fixing blocks, which are connected to one side of the second slider. A first groove is formed at the top of the second fixing block, and a square plate is slidably connected to the second fixing block through the first groove. One side of the square plate is connected to a second long plate, and a third fixing block is commonly connected between the two second long plates. The outer wall of the third fixing block is slidably connected to the inner wall of one of the second long plates. One side of one of the square plates is connected to a first fixing plate, the bottom of the first fixing plate is connected to a second fixing plate, and one side of the second fixing block is connected to a first long plate. Two third fixing plates are connected to one side of the first long plate, the third fixing plates are in contact with the second fixing plate, and a first motor is connected to the bottom of the third fixing plate.

[0008] As a further description of the above technical solution:

[0009] The output shaft of the first motor penetrates through one side of the third fixing plate and is connected to a gear. One side of the gear is engaged with a rack, and one side of the rack is connected to one side of the second fixing plate. A sixth groove is formed on one side of the second fixing plate close to the first long plate, and a plurality of pulleys are slidably connected to the second fixing plate through the sixth groove. The pulleys are connected to the third fixing plate through a rotating shaft.

[0010] As a further description of the above technical solution:

[0011] Both sides of the inner wall of the seventh groove are provided with eighth grooves, and a limiting mechanism is arranged in the seventh groove. The limiting mechanism includes a first spring. One end of the first spring is connected to the second slider through the seventh groove, the other end of the first spring is connected to a first fixing block, both sides of the first fixing block are connected to a first slider, and the first slider is slidably connected to the second slider through the eighth groove. One side of the first fixing block is connected to a handle. A second groove is formed at the top of the bottom plate, and the first fixing block is slidably connected to the bottom plate through the second groove.

[0012] As a further description of the above technical solution:

[0013] Two fifth grooves are formed at the top of the second slider, and the second slider is slidably connected to the square plate through the fifth grooves.

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of the present utility model are as follows:

[0015] 1. In the present utility model, by arranging a ratchet wheel, the ratchet wheel drives the second rotating handle to rotate through a connecting rod. The rotation of the second rotating handle drives the fourth round rod to move, and the fourth round rod drives the third slider to move, so as to be in contact with the convex block and make it rotate. The convex block drives the concave block to rotate and the second slider to move, thereby realizing the adjustment of the angle, and the identification plate can be stamped to form different angles, improving the application range of the machine.

[0016] 2. In the present utility model, by providing a gear and a pulley, the pulley is in contact with the second fixing plate, the gear drives the second fixing plate to move through a rack, the second fixing plate drives the first fixing plate to move, the first fixing plate drives one of the square plates to move, the square plate drives one of the second long plates to move, the second long plate drives the other second long plate to move through a third fixing block, and the second long plate drives the other square plate to move, so as to fix signboards of different sizes, prevent the signboards from slipping due to extrusion during the stamping process, improve the stability of stamping, and be able to process signboards of more sizes, greatly improving the adaptability of the machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0018] Figure 2 is a structural schematic diagram of the sliding mechanism of the present utility model;

[0019] Figure 3 is a sectional structural schematic diagram of the second lifting mechanism of the present utility model;

[0020] Figure 4 is of the present utility model Figure 3 is an enlarged schematic diagram of the structure of part B in the present utility model;

[0021] Figure 5 is a structural schematic diagram of the second lifting mechanism of the present utility model;

[0022] Figure 6 is a structural schematic diagram of the fourth groove of the present utility model;

[0023] Figure 7 is of the present utility model Figure 6 is an enlarged schematic diagram of the structure of part A in the present utility model;

[0024] Figure 8 is a structural schematic diagram of the first lifting structure of the present utility model;

[0025] Figure 9 is a structural schematic diagram of the fixing mechanism of the present utility model;

[0026] Figure 10 is a partial structural schematic diagram of the fixing mechanism of the present utility model;

[0027] Figure 11 is of the present utility model Figure 10 is an enlarged schematic diagram of the structure of part C in the present utility model;

[0028] Figure 12 is a structural schematic diagram of the limiting mechanism of the present utility model;

[0029] Figure 13Schematic diagram of the seventh groove structure of the present utility model;

[0030] Figure 14 Of the present utility model Figure 13 Enlarged schematic diagram of the structure of part D in;

[0031] Legend: 1. Slide rail; 2. Limiting mechanism; 201. First spring; 202. Handle; 203. First slider; 204. First fixed block; 3. Fixing mechanism; 301. First long plate; 302. Second fixed block; 303. First groove; 304. Square plate; 305. Second long plate; 306. First fixing plate; 307. Second fixing plate; 308. Third fixing plate; 309. Rack; 310. Gear; 311. First motor; 312. Third fixed block; 313. Sixth groove; 314. Pulley; 4. First lifting mechanism; 401. Counterweight; 402. Folding knife; 403. Fourth fixed block; 404. First rotating handle; 405. Fifth fixed block; 406. Right-angle fixing plate; 407. Fourth fixing plate; 408. Round block; 409. Second motor; 410. First round rod; 5. Bottom plate; 6. Sliding mechanism; 601. Second slider; 602. Concave block; 603. Second round rod; 604. Third round rod; 605. Convex block; 606. Fifth groove; 607. Seventh groove; 608. Eighth groove; 609. Third spring; 610. Second telescopic rod; 7. Second lifting mechanism; 701. Third motor; 702. Sixth fixed block; 703. Second rotating handle; 704. Third slider; 705. Fourth round rod; 706. Ratchet; 707. Fifth round rod; 708. First round block; 709. Sixth round rod; 710. Hinge seat; 711. First telescopic rod; 712. Semi-circular block; 713. Second spring; 714. Pawl; 8. Second groove; 9. Fourth groove. Detailed implementation manners

[0032] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0033] Please refer to Figure 1-14, the present utility model provides a technical solution: a frame bending device for sign production, including a bottom plate 5. Two slide rails 1 are connected to the top of the bottom plate 5, and a sliding mechanism 6 is slidably connected to the top of the slide rails 1. The sliding mechanism 6 includes two second sliders 601, and a seventh groove 607 is provided in one of the second sliders 601. The bottom of the second slider 601 is slidably connected to the top of the slide rail 1. Two second telescopic rods 610 are connected between the two second sliders 601, and a third spring 609 is sleeved outside the second telescopic rod 610. Both ends of the third spring 609 are connected to one side of the two second sliders 601 respectively. Inside one side of the second slider 601 near the top, a third round rod 604 is connected. A concave block 602 is rotatably connected to the outer wall of one of the third round rods 604, and a convex block 605 is rotatably connected to the outer wall of the other third round rod 604. Both sides of the convex block 605 are connected with second round rods 603, and the second round rods 603 are rotatably connected to the concave block 602. A second lifting mechanism 7 is provided on the top of the bottom plate 5. The second lifting mechanism 7 includes a third motor 701, a sixth fixing block 702 and two semi-circular blocks 712. The bottom of the sixth fixing block 702 is connected to the top of the bottom plate 5, and the bottom of the third motor 701 is connected to the top of the bottom plate 5. The output shaft of the third motor 701 is connected with a ratchet wheel 706, and a fifth round rod 707 is connected to the bottom of one side of the ratchet wheel 706. A second rotating handle 703 is rotatably connected to the outer wall of the fifth round rod 707, and a fourth round rod 705 is rotatably connected to the inner wall of one end of the second rotating handle 703. One end of the fourth round rod 705 is connected with a third slider 704. A moving groove is provided in the sixth fixing block 702, and the third slider 704 slides on the moving groove. A fourth groove 9 is provided in the middle of the top of the bottom plate 5, and the bottom of one of the semi-circular blocks 712 is connected to the top of the fourth groove 9. A hinge seat 710 is hinged to one side of the semi-circular block 712, and the same first telescopic rod 711 is connected between the two hinge seats 710. A second spring 713 is sleeved outside the first telescopic rod 711, and both ends of the second spring 713 are connected to one side of the two hinge seats 710 respectively. A pawl 714 is connected to one side of the other semi-circular block 712, and the pawl 714 is attached to one side of the ratchet wheel 706. A first round block 708 is connected to one side of the pawl 714, and a sixth round rod 709 is rotatably connected to the inner wall of the first round block 708, and both ends of the sixth round rod 709 are connected to the inner wall of the fourth groove 9.

[0034] The implementation method is specifically as follows: By setting the second motor 701 to rotate, the ratchet wheel 706 is driven to rotate. The rotation of the ratchet wheel 706 drives the fifth round rod 707 and the pawl 714 to move. The pawl 714 meshes with the gear 706. The movement of the pawl 714 drives the first round block 708 to rotate and one of the semi-circular blocks 712 to move. The movement of the semi-circular block 712 drives the rotation of an articulated seat 710 connected thereto. The rotation of the articulated seat 710 drives the movement of the second spring 713 and the first telescopic rod 711, thereby driving the rotation of another articulated seat 710 connected to the other ends of the second spring 713 and the first telescopic rod 711 on another semi-circular block 712, thereby restricting the one-way rotation of the ratchet wheel 706 and achieving the effect of limiting. The movement of the fifth round rod 707 drives the rotation of the second rotating handle 703. The rotation of the second rotating handle 703 drives the movement of the fourth round rod 705. The movement of the fourth round rod 705 drives the movement of the third slider 704. During the movement of the third slider 704, it contacts the convex block 605. The convex block 605 and the concave block 602 are respectively rotatably connected to the second slider 601 through the third round rod 604, so that the convex block 605 rotates. The rotation of the convex block 605 drives the movement of the second round rod 603 and one of the second sliders 601 to move. The second slider 601 is slidably connected to the slide rail 1, so that it moves stably. A second telescopic rod 610 and a third spring 609 are arranged between the two second sliders 601, so that one of the second sliders 601 can move back. The movement of the second round rod 603 drives the rotation of the concave block 602. Through the rotation of the convex block 605 and the concave block 602, the adjustment of the bending angle is realized, so that it can punch various angles, and the applicable range of the machine is improved.

[0035] Two fixing mechanisms 3 are arranged on both sides of the second slider 601 close to the slide rail 1. The fixing mechanism 3 includes two second fixing blocks 302, and the second fixing blocks 302 are connected to one side of the second slider 601. A first groove 303 is formed at the top of the second fixing block 302, and a square plate 304 is slidably connected to the second fixing block 302 through the first groove 303. One side of the square plate 304 is connected to a second long plate 305, and a third fixing block 312 is commonly connected between the two second long plates 305. The outer wall of the third fixing block 312 is slidably connected to the inner wall of one of the second long plates 305. One side of one of the square plates 304 is connected to a first fixing plate 306. The bottom of the first fixing plate 306 is connected to a second fixing plate 307, and one of the second fixing blocks 302 is connected to a first long plate 301 at the top. Two third fixing plates 308 are connected to one side of the first long plate 301, and the third fixing plates 308 are attached to the second fixing plate 307. A first motor 311 is connected to the bottom of the third fixing plate 308. The output shaft of the first motor 311 penetrates through one side of the third fixing plate 308 and is connected to a gear 310. One side of the gear 310 is engaged with a rack 309, and one side of the rack 309 is connected to one side of the second fixing plate 307. A sixth groove 313 is formed on one side of the second fixing plate 307 close to the first long plate 301, and a plurality of pulleys 314 are slidably connected to the second fixing plate 307 through the sixth groove 313. The pulley 314 is connected to the third fixing plate 308 through a rotating shaft.

[0036] The specific implementation method is as follows: By setting two first motors 311 to rotate, the gears 310 are driven to rotate. The rotation of the gears 310 drives the racks 309 to move. The movement of the racks 309 drives the second fixing plate 307 to move on the two third fixing plates 308. A sixth groove 313 is formed on one side of the second fixing plate 307, and the sixth groove 313 is attached to the plurality of pulleys 4, so that the second fixing plate 307 can move stably. The movement of the second fixing plate 307 drives the first fixing plate 306 to move. The movement of the first fixing plate 306 drives one of the square plates 304 to move on the first groove 303. The movement of the square plate 304 drives one of the second long plates 305 to move. The second long plate 305 drives the other second long plate 305 to move through the third fixing block 321. The movement of the second long plate 305 drives the other square plate 304 to move on the first groove 303. The first groove 303 is connected to the second slider 601 through the second fixing block 302, and a fifth groove 606 is provided on the second slider 601, so that the square plate 304 can move on the fifth groove 606, thereby fixing signboards of different sizes, improving the adaptability of the machine, and preventing the signboard from slipping due to extrusion during the bending process, improving the stability of bending.

[0037] Working principle: When in use, the second motor 7 drives the ratchet wheel 706 to rotate through the output shaft. The ratchet wheel 706 drives the second rotating handle 703 to rotate through the connecting rod. The second rotating handle 703 drives the third slider 704 to move through the fourth round rod 705. The third slider 704 fits with the convex block 605, causing the convex block 605 to rotate. The convex block 605 drives the concave block 602 to rotate through the second round rod 603 and drives the second slider 601 to move, thus realizing the adjustment of the angle. The rotation of the ratchet wheel 706 drives the pawl 714 to move. The pawl 714 realizes rotation through the first round block 708 and the sixth round rod 709. The pawl 714 realizes rotation through the semi-circular block 712 and the hinge seat 710. The hinge seat 710 drives the second spring 713 and the first telescopic rod 711 to move. The first telescopic rod 711 realizes rotation through another hinge seat 710 and another semi-circular block 712, thus realizing the effect of one-way rotation. The first fixing block 204 moves in the eighth groove 608 through the first slider 203 and the first spring 201. The first fixing block 204 fits with the second groove 8, making the second slider 601 more stable. The first motor 311 drives the gear 310 to rotate through the output shaft. The gear 310 drives the second fixing plate 307 to move through the rack 309. The second fixing plate 307 fits with the pulley 314 through the sixth groove 313. The second fixing plate 307 drives the first fixing plate 306 to move. The first fixing plate 306 drives one of the square plates 304 to move in the first groove 303. The square plate 304 drives one of the second long plates 305 to move. The second long plate 305 drives the third fixing block 312 to move. The third fixing block 312 drives the other second long plate 305 to move. The second long plate 305 drives the other square plate 304 to move in the first groove 303. The first groove 303 is connected to the fifth groove 606, thus realizing the adjustment of the size and the fixing effect on the sign. The second motor 409 drives the first rotating handle 404 to rotate through the output shaft. The first rotating handle 404 drives the round block 408 to move through the first round rod 410. The round block 408 drives the fourth fixing block 403 to move. The fourth fixing block 403 drives the fourth fixing plate 407 to move. The fourth fixing plate 407 drives the folding knife 402 to move, thus realizing the stamping and bending of the sign.

[0038] The above is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and the inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A frame bending device for sign production, comprising a bottom plate (5), characterized in that: Two slide rails (1) are connected to the top of the bottom plate (5), and a sliding mechanism (6) is slidably connected to the top of the slide rails (1). The sliding mechanism (6) includes two second sliders (601), and a seventh groove (607) is formed in one of the second sliders (601). The bottom of the second slider (601) is slidably connected to the top of the slide rail (1), and two second telescopic rods (610) are connected between the two second sliders (601). A third spring (609) is sleeved outside the second telescopic rod (610). Two ends of the third spring (609) are respectively connected to one side of the two second sliders (601). A third round rod (604) is connected to the inside of one side of the second slider (601) near the top. A concave block (602) is rotatably connected to the outer wall of one of the third round rods (604), and a convex block (605) is rotatably connected to the outer wall of the other third round rod (604). Two second round rods (603) are connected to both sides of the convex block (605), and the second round rod (603) is rotatably connected to the concave block (602). A second lifting mechanism (7) is arranged on the top of the bottom plate (5). The second lifting mechanism (7) includes a third motor (701), a sixth fixing block (702) and two semi-circular blocks (712). The bottom of the sixth fixing block (702) is connected to the top of the bottom plate (5), and the bottom of the third motor (701) is connected to the top of the bottom plate (5). A ratchet wheel (706) is connected to the output shaft of the third motor (701), and a fifth round rod (707) is connected to the bottom of one side of the ratchet wheel (706). A second rotating handle (703) is rotatably connected to the outer wall of the fifth round rod (707), and a fourth round rod (705) is rotatably connected to the inner wall of one end of the second rotating handle (703). A third slider (704) is connected to one end of the fourth round rod (705). A moving groove is formed in the sixth fixing block (702), and the third slider (704) slides on the moving groove. A fourth groove (9) is formed in the middle of the top of the bottom plate (5), and the bottom of one of the semi-circular blocks (712) is connected to the top of the fourth groove (9). A hinge seat (710) is hinged to one side of the semi-circular block (712), and the same first telescopic rod (711) is connected between the two hinge seats (710). A second spring (713) is sleeved outside the first telescopic rod (711), and two ends of the second spring (713) are respectively connected to one side of the two hinge seats (710). A ratchet pawl (714) is connected to one side of the other semi-circular block (712), and the ratchet pawl (714) is attached to one side of the ratchet wheel (706). A first round block (708) is connected to one side of the ratchet pawl (714), and a sixth round rod (709) is rotatably connected to the inner wall of the first round block (708). Two ends of the sixth round rod (709) are connected to the inner walls of the fourth groove (9).

2. The frame bending device for producing identification plates according to claim 1, wherein: On one side of the second slider (601), a first lifting mechanism (4) is provided. The first lifting mechanism (4) includes a right-angle fixing plate (406), and the bottom of the right-angle fixing plate (406) is connected to the top of the bottom plate (5). On one side of the right-angle fixing plate (406), a second motor (409) is connected. The output shaft of the second motor (409) is connected to a first rotating handle (404). The inner wall of the first rotating handle (404) is rotatably connected to a first round rod (410). One end of the first round rod (410) is connected to a round block (408). The outer wall of the round block (408) is slidably connected to a fourth fixing block (403). On both sides of the fourth fixing block (403), two fifth fixing blocks (405) are slidably connected. The bottom side of one of the fifth fixing blocks (405) is connected to one side of the bottom plate (5). The top of the fourth fixing block (403) is connected to a fourth fixing plate (407). The bottom of the fourth fixing plate (407) is connected to a folding knife (402). On one side of the fourth fixing plate (407) near the folding knife (402), a counterweight block (401) is connected.

3. The frame bending device for sign production according to claim 1, characterized in that: On both sides of the second slider (601) close to the slide rail (1), two fixing mechanisms (3) are provided. The fixing mechanism (3) includes two second fixing blocks (302). The second fixing blocks (302) are connected to one side of the second slider (601). On the top of the second fixing block (302), a first groove (303) is formed. The second fixing block (302) is slidably connected to a square plate (304) through the first groove (303). On one side of the square plate (304), a second long plate (305) is connected. Between the two second long plates (305), a third fixing block (312) is commonly connected. The outer wall of the third fixing block (312) is slidably connected to the inner wall of one of the second long plates (305). On one side of one of the square plates (304), a first fixing plate (306) is connected. The bottom of the first fixing plate (306) is connected to a second fixing plate (307). On the top of one of the second fixing blocks (302), a first long plate (301) is connected. On one side of the first long plate (301), two third fixing plates (308) are connected. The third fixing plates (308) are in contact with the second fixing plate (307). The bottom of the third fixing plate (308) is connected to a first motor (311).

4. The frame bending device for sign production according to claim 3, characterized in that: The output shaft of the first motor (311) penetrates through one side of the third fixing plate (308) and is connected to a gear (310). On one side of the gear (310), a rack (309) is engaged. One side of the rack (309) is connected to one side of the second fixing plate (307). On one side of the second fixing plate (307) close to the first long plate (301), a sixth groove (313) is formed. The second fixing plate (307) is slidably connected to a plurality of pulleys (314) through the sixth groove (313). The pulleys (314) are connected to the third fixing plate (308) through a rotating shaft.

5. A frame bending device for sign production according to claim 1, characterized in that: On both sides of the inner wall of the seventh groove (607), there are eighth grooves (608) opened, and a limiting mechanism (2) is arranged in the seventh groove (607). The limiting mechanism (2) includes a first spring (201). One end of the first spring (201) is connected to a second slider (601) through the seventh groove (607). The other end of the first spring (201) is connected to a first fixing block (204). Both sides of the first fixing block (204) are connected with first sliders (203). The first sliders (203) are slidably connected to the second slider (601) through the eighth grooves (608). One side of the first fixing block (204) is connected with a handle (202). A second groove (8) is opened at the top of the bottom plate (5). The first fixing block (204) is slidably connected to the bottom plate (5) through the second groove (8).

6. The frame bending device for sign production according to claim 1, characterized in that: Two fifth grooves (606) are opened at the top of the second slider (601). The second slider (601) is slidably connected to the square plate (304) through the fifth grooves (606).

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