A glue-coating machine with an improved commutation mechanism

Abstract

This utility model discloses an improved reversing mechanism for a gluing machine. The reversing mechanism includes a reversing drive gear and a reversing lever. The reversing drive gear is fixedly mounted on the output shaft of a drive motor. The reversing lever is rotatably mounted on one side of the frame and located beside the reversing drive gear. The reversing drive gear is connected to two glue rollers. At least one arc-shaped reversing groove is formed on the outer surface of the reversing drive gear along the circumferential direction. The reversing lever is equipped with a reversing top block. One end of the reversing groove is a forward rotation limit end, and the other end is a reverse rotation limit end. The reversing top block abuts against the forward rotation limit end and the reverse rotation limit end, respectively. By rotating the reversing lever, the abutting position relationship between the reversing top block and the forward rotation limit end and the reverse rotation limit end can be adjusted, thereby switching between forward and reverse operation states. This simplifies the reversing mechanism, reduces costs, shrinks the size, improves the reversing success rate, avoids tooth breakage, extends the service life of the gluing machine, and improves reliability and stability.

Description

Technical Field

[0001] This utility model relates to the field of gluing machine technology, and in particular to a gluing machine with an improved reversing mechanism. Background Technology

[0002] A laminating machine is an office equipment that bonds polyester film coated with hot melt adhesive to the object being sealed by heating and pressurizing. During laminating, film jamming can occur. When this happens, the glue roller needs to rotate in the opposite direction to remove the film; therefore, the glue roller needs to be capable of both forward and reverse rotation. Existing laminating machines mainly use a motor with a reversing function for reversing, which is costly and has a complex control method. There are also laminating machines that use a reversing mechanism for reversing. The traditional reversing mechanism uses two reversing gears with different rotation directions to mesh with the gears of the glue roller to change the roller's rotation direction. This type of reversing mechanism is prone to gear grinding during switching, has a low reversing success rate, accelerates gear wear, reduces service life, has a high failure rate, and poor reliability and stability. Therefore, it is necessary to improve this mechanism. Utility Model Content

[0003] To address the shortcomings of existing technologies, the purpose of this utility model is to provide an improved gluing machine with an improved reversing mechanism, which simplifies the reversing mechanism, reduces costs, increases the success rate of reversing, and improves reliability and stability.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a glue applicator with an improved reversing mechanism, comprising two core components. Each core component includes a frame, a drive motor, a reversing mechanism, a heating mechanism, and two glue rollers. The two glue rollers are rotatably mounted within the frame and roll against each other. The heating mechanism is located either inside or outside the two glue rollers. The drive motor is connected to the reversing mechanism, which is also connected to the two glue rollers. The reversing mechanism includes a reversing drive gear and a reversing lever. The reversing drive gear is fixedly mounted on the output shaft of the drive motor, and the reversing lever is rotatably mounted on one side of the frame and located beside the reversing drive gear. The reversing drive gear is connected to the two glue rollers.

[0005] The outer surface of the reversing drive gear is provided with at least one arc-shaped reversing groove along the circumferential direction. The first end of the reversing lever extends out of the outer shell of the gluing machine. The second end of the reversing lever is provided with a reversing top block extending toward the reversing drive gear. One end of the reversing groove is a forward rotation limit end and the other end is a reverse rotation limit end. The reversing top block abuts against the forward rotation limit end and the reverse rotation limit end respectively.

[0006] The gluing machine has a forward rotation mode and a reverse rotation mode. In the forward rotation mode, the end face of the reversing top block faces the direction of reverse rotation of the drive motor, and in the reverse rotation mode, the end face of the reversing top block faces the direction of forward rotation of the drive motor.

[0007] In a further technical solution, the second end of the reversing lever is provided with two reversing top blocks, the rotation shafts of the two reversing top blocks and the reversing lever are spaced apart, and the two reversing top blocks are respectively engaged with the forward rotation limit end and the reverse rotation limit end of the reversing groove.

[0008] In a further technical solution, the reversing lever includes an integrally formed operating part, a connecting part, a rotating part, and two reversing top blocks. The operating part and the connecting part are integrally formed, and the connecting part and the rotating part are integrally formed. The two reversing top blocks are respectively arranged at intervals along the circumferential direction on the outer side of the rotating part. The rotating part is rotatably mounted on the side of the reversing drive gear, and the operating part extends out of the outer shell of the glue applicator.

[0009] In a further technical solution, a rotating hole is provided at the center of the rotating part, and an elastic groove communicating with the rotating hole is provided on one side of the rotating part.

[0010] In a further technical solution, the clamping angle between the two reversing blocks is 45–100°.

[0011] In a further technical solution, two reversing grooves are provided on the outer surface of the reversing drive gear. The two reversing grooves are symmetrically arranged along the rotation axis of the reversing drive gear. The forward rotation limit end and the reverse rotation limit end of the two reversing grooves respectively abut against the reversing top block.

[0012] In a further technical solution, during forward rotation, the first reversing block is inserted into the reversing slot with its end face facing the direction of reverse rotation of the drive motor, while the second reversing block is away from the reversing slot.

[0013] When the drive motor rotates forward, the reverse limit end of the commutator slot abuts against the side of the first commutator block, and the first commutator block moves out of the commutator slot.

[0014] When the drive motor reverses, the forward rotation limit end of the commutation slot abuts against the end face of the first commutation block to achieve forward rotation of the drive motor;

[0015] In reverse operation, the second reversing block is inserted into the reversing slot with its end face facing the direction of the drive motor's forward rotation, while the first reversing block is away from the reversing slot.

[0016] When the drive motor reverses, the forward rotation limit end of the reversing slot abuts against the side of the second reversing block, and the second reversing block moves out of the reversing slot.

[0017] When the drive motor rotates forward, the reverse limit end of the commutation slot abuts against the end of the second commutation top block to achieve reverse rotation of the drive motor.

[0018] In a further technical solution, the frame is provided with a reversing slide groove, and the reversing lever passes through the reversing slide groove. The inner side of the middle part of the reversing slide groove is provided with a limiting protrusion. The reversing lever and the two sides of the limiting protrusion abut against each other. When the reversing lever is located on the first side of the limiting protrusion, the gluing machine enters the forward rotation working state. When the reversing lever is located on the second side of the limiting protrusion, the gluing machine enters the reverse rotation working state.

[0019] In a further technical solution, the frame is also provided with an L-shaped locking groove, which includes a horizontal groove and a vertical groove. The first end of the horizontal groove is connected to the reversing slide groove, and the second end of the horizontal groove is connected to the first end of the vertical groove. The second end of the vertical groove extends toward the first end of the reversing slide groove. The vertical groove and the reversing slide groove are parallel and spaced apart. When the reversing lever is located in the vertical groove, the gluing machine enters the forward rotation working state.

[0020] In a further technical solution, roller pressing gears are fixedly installed at the same end of the two rubber rollers, and the two roller pressing gears mesh with each other. A reversing transmission gear is rotatably installed on the frame, and the reversing transmission gear meshes with any one of the roller pressing gears. A gear part is provided at the first end of the reversing drive gear, and a fixing part is provided at the second end of the reversing drive gear. The fixing part is fixedly connected to the output shaft of the drive motor or integrally formed. The gear part meshes with the reversing transmission gear. A reversing groove is provided in the middle of the reversing drive gear. A rotating protrusion is provided in the center of the side of the reversing transmission gear facing the reversing groove. A reversing lever is rotatably installed on the rotating protrusion.

[0021] The advantages of this invention compared to existing technologies are as follows: In the forward rotation state, when the drive motor rotates forward, the side of the reversing block abuts against the reverse limit end of the reversing slot, and the reversing drive gear pushes the reversing lever to rotate, causing the reversing block to move out of the reversing slot. When the drive motor rotates in reverse, the end of the reversing block abuts against the forward rotation limit end of the reversing slot, thereby forcing the drive motor to rotate forward and maintaining its forward rotation. In the reverse rotation state, when the drive motor rotates in reverse, the side of the reversing block abuts against the forward rotation limit end of the reversing slot, and the reversing drive gear... The reversing lever is rotated to move the reversing top block out of the reversing slot. When the drive motor rotates forward, the end of the reversing top block abuts against the reverse limit end of the reversing slot, thereby forcing the drive motor to reverse and maintaining the drive motor in reverse. By rotating the reversing lever, the abutting position relationship between the reversing top block and the forward and reverse limit ends is adjusted, thereby switching the forward and reverse working states of the gluing machine. This simplifies the reversing mechanism, reduces costs, shrinks the size, improves the reversing success rate, avoids tooth breakage, extends the service life of the gluing machine, and improves reliability and stability. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 This is an exploded view of the present invention;

[0025] Figure 3 This is a schematic diagram of the tooling state of the commutation mechanism when the drive motor rotates forward in the forward rotation working state of this utility model;

[0026] Figure 4 This is a schematic diagram of the tooling state of the commutation mechanism when the drive motor reverses during forward rotation operation of this utility model.

[0027] Figure 5 This is a schematic diagram of the tooling state of the commutation mechanism when the drive motor reverses during the reverse working state of this utility model;

[0028] Figure 6 This is a schematic diagram of the tooling state of the commutation mechanism when the drive motor rotates forward in the reverse working state of this utility model.

[0029] In the picture:

[0030] 1. Frame, 11. Reversing slide groove, 12. Limiting protrusion, 13. L-shaped locking groove, 131. Horizontal groove, 132. Vertical groove;

[0031] 2 drive motors;

[0032] 3 reversing drive gear, 31 gear part, 32 fixing part, 33 reversing groove, 331 forward rotation limit end, 332 reverse rotation limit end;

[0033] 4. Reversing lever, 41. Operating part, 42. Connecting part, 43. Rotating part, 431. Rotating hole, 432. Elastic groove, 44. Reversing top block;

[0034] 5 rubber rollers, 51 roller pressing gears;

[0035] 6. Reversing transmission gear, 61. Rotating cam. Detailed Implementation

[0036] The following are merely preferred embodiments of the present invention and do not limit the scope of protection of the present invention.

[0037] An improved gluing machine with a reversing mechanism, such as Figures 1 to 6As shown, the device includes two mechanisms. Each mechanism comprises a frame 1, a drive motor 2, a reversing mechanism, a heating mechanism, and two rubber rollers 5. The two rubber rollers 5 are rotatably mounted inside the frame 1 and roll against each other. The heating mechanism is located inside or outside the two rubber rollers 5. The drive motor 2 is connected to the reversing mechanism, which in turn is connected to the two rubber rollers 5. The reversing mechanism includes a reversing drive gear 3 and a reversing lever 4. The reversing drive gear 3 is fixedly mounted on the output shaft of the drive motor 2. The reversing lever 4 is rotatably mounted on one side of the frame 1 and located beside the reversing drive gear 3. The reversing drive gear 3 is connected to the two rubber rollers 5. At least one arc-shaped reversing groove 33 is provided on the outer side along the circumferential direction. The first end of the reversing lever 4 extends out of the outer shell of the gluing machine. The second end of the reversing lever 4 is provided with a reversing top block 44 extending toward the reversing drive gear 3. One end of the reversing groove 33 is a forward rotation limit end 331 and the other end is a reverse rotation limit end 332. The reversing top block 44 abuts against the forward rotation limit end 331 and the reverse rotation limit end 332 respectively. The gluing machine is provided with a forward rotation working state and a reverse rotation working state. In the forward rotation working state, the end face of the reversing top block 44 faces the reverse direction of the drive motor 2. In the reverse rotation working state, the end face of the reversing top block 44 faces the forward rotation direction of the drive motor 2.

[0038] Traditional gluing machines use a reversing gear to mesh or disengage with the transmission gear to achieve reversing. During the disengagement and engagement of the gears, tooth breakage is prone to occur, resulting in a low success rate of reversing and easy wear of the gears. Consequently, the gluing machine has a short service life and a high failure rate. Using a drive motor 2 with a reversing function for reversing is complex and costly. In contrast, the gluing machine of this invention has forward and reverse working states, and the drive motor 2 is a permanent magnet synchronous motor.

[0039] In the forward rotation state, rotate the reversing lever 4 to insert the reversing top block 44 into the reversing slot 33, and make the end face of the reversing top block 44 face the reverse direction of the output shaft of the drive motor 2, such as... Figure 3 As shown, when the drive motor 2 rotates forward, the side of the reversing top block 44 abuts against the reverse limiting end 332 of the reversing slot 33, and the reversing drive gear 3 pushes the reversing lever 4 to rotate, causing the reversing top block 44 to move out of the reversing slot 33, as shown. Figure 4 As shown, when the drive motor 2 reverses, the end of the reversing top block 44 abuts against the forward rotation limit end 331 of the reversing slot 33, thereby forcing the drive motor 2 to rotate forward, so as to keep the drive motor 2 rotating forward.

[0040] In the reverse operating state, rotate the reversing lever 4 to insert the reversing top block 44 into the reversing slot 33, and make the end face of the reversing top block 44 face the forward rotation direction of the output shaft of the drive motor 2, such as... Figure 5As shown, when the drive motor 2 reverses, the side of the reversing top block 44 abuts against the forward rotation limit end 331 of the reversing slot 33, and the reversing drive gear 3 pushes the reversing lever 4 to rotate, causing the reversing top block 44 to move out of the reversing slot 33, as shown. Figure 6 As shown, when the drive motor 2 rotates forward, the end of the reversing top block 44 abuts against the reverse limit end 332 of the reversing groove 33, thereby forcing the drive motor 2 to rotate in reverse to keep the drive motor 2 rotating in reverse. By rotating the reversing lever 4, the abutting position relationship between the reversing top block 44 and the forward limit end 331 and the reverse limit end 332 can be adjusted, thereby switching the forward and reverse working states of the gluing machine, simplifying the reversing mechanism, reducing costs, reducing size, improving the reversing success rate, avoiding tooth breakage, extending the service life of the gluing machine, and improving reliability and stability.

[0041] Specifically, the second end of the reversing lever 4 is provided with two reversing top blocks 44. The two reversing top blocks 44 are spaced apart from the rotation axis of the reversing lever 4, and the two reversing top blocks 44 respectively abut against the forward rotation limiting end 331 and the reverse rotation limiting end 332 of the reversing slot 33. In the forward rotation working state, the first reversing top block 44 is inserted into the reversing slot 33 with its end face facing the reverse rotation direction of the drive motor 2, and the second reversing top block 44 is away from the reversing slot 33.

[0042] When drive motor 2 rotates forward, as Figure 3 As shown, the reverse limiting end 332 of the reversing groove 33 abuts against the side of the first reversing top block 44, and the reversing drive gear 3 pushes the first reversing top block 44 until the first reversing top block 44 moves out of the reversing groove 33, thereby causing the reversing lever 4 to rotate to avoid the reversing drive gear 3.

[0043] When drive motor 2 reverses, such as Figure 4 As shown, the forward rotation limiting end 331 of the reversing slot 33 abuts against the end face of the first reversing top block 44, thereby preventing the reversing drive gear 3 from reversing and forcing the drive motor 2 to rotate forward. After the drive motor 2 rotates forward, the reverse rotation limiting end 332 of the reversing slot 33 abuts against the side of the first reversing top block 44, and the reversing drive gear 3 pushes the first reversing top block 44 until the first reversing top block 44 moves out of the reversing slot 33, so that the drive motor 2 keeps rotating forward.

[0044] In the reverse operation state, the second reversing top block 44 is inserted into the reversing slot 33 with its end face facing the direction of forward rotation of the drive motor 2, while the first reversing top block 44 is away from the reversing slot 33.

[0045] When drive motor 2 reverses, such as Figure 5As shown, the forward rotation limiting end 331 of the reversing groove 33 abuts against the side of the second reversing top block 44, and the reversing drive gear 3 pushes the second reversing top block 44 until the second reversing top block 44 moves out of the reversing groove 33, thereby causing the reversing lever 4 to rotate to avoid the reversing drive gear 3.

[0046] When drive motor 2 rotates forward, as Figure 6 As shown, the reverse limiting end 332 of the reversing groove 33 abuts against the end of the second reversing top block 44, thereby blocking the reversing drive gear 3 from rotating forward and forcing the drive motor 2 to rotate in reverse. After the drive motor 2 rotates forward, the reverse limiting end 332 of the reversing groove 33 abuts against the side of the second reversing top block 44, and the reversing drive gear 3 pushes the second reversing top block 44 until the second reversing top block 44 moves out of the reversing groove 33, so that the drive motor 2 remains in reverse.

[0047] By having two reversing top blocks 44 engage with the forward and reverse limiting ends 331 and 332 of the reversing slot 33 respectively in the forward and reverse working states, the end face of the first reversing top block 44 faces the reverse direction of the drive motor 2 in the forward working state, and the end face of the second reversing top block 44 faces the forward direction of the drive motor 2 in the reverse working state. This shortens the rotation stroke of the reversing lever 4 when switching between the forward and reverse working states, enabling switching within a shorter stroke and reducing space occupation.

[0048] Specifically, the reversing lever 4 includes an integrally formed operating part 41, a connecting part 42, a rotating part 43, and two reversing top blocks 44. The operating part 41 and the connecting part 42 are integrally formed, and the connecting part 42 and the rotating part 43 are integrally formed. The two reversing top blocks 44 are respectively arranged at intervals along the circumferential direction on the outer side of the rotating part 43. The rotating part 43 is rotatably mounted on the side of the reversing drive gear 3. The operating part 41 extends out of the outer shell of the gluing machine. The integrally formed reversing lever 4 has a simple manufacturing process and low cost. By moving the operating part 41, the reversing lever 4 can be rotated to switch between forward and reverse working states, making operation convenient.

[0049] Specifically, a rotating hole 431 is provided at the center of the rotating part 43, and an elastic groove 432 communicating with the rotating hole 431 is provided on one side of the rotating part 43. The elastic groove 432 imparts elastic potential energy to the rotating part 43, which can play a buffering role when the forward limiting end 331 and the reverse limiting end 332 abut against the reversing top block 44, thereby reducing the risk of breakage of the reversing top block 44 and improving reliability and stability.

[0050] Specifically, the clamping angle between the two reversing top blocks 44 is 45–100°. Preferably, the clamping angle between the two reversing top blocks 44 is 60–70°. The clamping angle between the forward limiting end 331 and the reverse limiting end 332 of the same reversing slot 33 is 160–170°.

[0051] Specifically, the outer surface of the reversing drive gear 3 is provided with two reversing grooves 33. The two reversing grooves 33 are symmetrically arranged along the rotation axis of the reversing drive gear 3. The forward rotation limiting end 331 and the reverse rotation limiting end 332 of the two reversing grooves 33 respectively abut against the reversing top block 44. The two symmetrically arranged reversing grooves 33 can increase the probability of the reversing top block 44 entering the reversing grooves 33, thereby improving the reversing success rate. Furthermore, by setting two reversing grooves 33, the number of forward rotation limiting ends 331 and reverse rotation limiting ends 332 is increased. When the drive motor 2 starts and rotates in the predetermined direction, it can quickly perform reversing, thereby improving the reversing speed.

[0052] Specifically, the frame 1 has a reversing groove 11, and the reversing lever 4 passes through the reversing groove 11. A limiting protrusion 12 is provided on the inner side of the middle part of the reversing groove 11. The reversing lever 4 abuts against both sides of the limiting protrusion 12. When the reversing lever 4 is located on the first side of the limiting protrusion 12, the gluing machine enters the forward rotation working state; when the reversing lever 4 is located on the second side of the limiting protrusion 12, the gluing machine enters the reverse rotation working state. The reversing groove 11 limits the reversing lever 4 in the axial direction, preventing displacement of the reversing lever 4 in the axial direction. The limiting protrusion 12 limits the reversing lever 4, preventing accidental rotation due to vibration or other external forces from causing a switch between forward and reverse working states, thus improving reliability and stability.

[0053] Specifically, the frame 1 is also provided with an L-shaped locking groove 13, which includes a horizontal groove 131 and a vertical groove 132. The first end of the horizontal groove 131 is connected to the reversing slide 11, and the second end of the horizontal groove 131 is connected to the first end of the vertical groove 132. The second end of the vertical groove 132 extends toward the first end of the reversing slide 11. The vertical groove 132 is parallel to and spaced apart from the reversing slide 11. When the reversing lever 4 is located in the vertical groove 132, the gluing machine enters the forward rotation working state. Since the gluing machine is in the forward rotation working state during the gluing process, it only needs to switch to the reverse rotation working state after the glue jamming phenomenon occurs. The glue jamming phenomenon is an occasional phenomenon. Therefore, the reversing lever 4 is locked by the L-shaped locking groove 13, thereby locking the gluing machine in the forward rotation working state, further preventing accidental switching and improving reliability and stability.

[0054] Specifically, two rollers 5 are respectively fixedly installed with roller pressing gears 51 at the same end, and the two roller pressing gears 51 mesh with each other. A reversing transmission gear 6 is rotatably installed on the frame 1. The reversing transmission gear 6 meshes with any one of the roller pressing gears 51. A gear part 31 is provided at the first end of the reversing drive gear 3, and a fixing part 32 is provided at the second end of the reversing drive gear 3. The fixing part 32 is fixedly connected to the output shaft of the drive motor 2 or integrally formed. The gear part 31 meshes with the reversing transmission gear 6. A reversing groove 33 is provided in the middle of the reversing drive gear 3. A rotating protrusion 61 is provided in the center of the side of the reversing transmission gear 6 facing the reversing groove 33. The reversing lever 4 is rotatably installed on the rotating protrusion 61. The drive motor 2 drives the reversing drive gear 3 to rotate, the reversing drive gear 3 drives the reversing transmission gear 6 to rotate, the reversing transmission gear 6 drives one of the roller pressing gears 51 to rotate, and the roller pressing gear 51 drives the other roller pressing gear 51 to rotate, thereby driving the two rubber rollers 5 to rotate relative to each other to pass or remove glue. The reversing lever 4 is directly mounted on the reversing transmission gear 6, which reduces the installation space occupied, further reduces the volume, simplifies the structure, and reduces the cost.

[0055] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A glue applicator with an improved reversing mechanism, comprising two cores, each core including a frame (1), a drive motor (2), a reversing mechanism, a heating mechanism, and two glue rollers (5), the two glue rollers (5) being rotatably mounted inside the frame (1) and mutually rolling and pressing together, the heating mechanism being disposed inside or outside the two glue rollers (5), the drive motor (2) being drivenly connected to the reversing mechanism, and the reversing mechanism being drivenly connected to the two glue rollers (5), characterized in that: The reversing mechanism includes a reversing drive gear (3) and a reversing lever (4). The reversing drive gear (3) is fixedly mounted on the output shaft of the drive motor (2). The reversing lever (4) is rotatably mounted on one side of the frame (1) and located next to the reversing drive gear (3). The reversing drive gear (3) is connected to two rubber rollers (5) in a transmission manner. The outer side of the reversing drive gear (3) is provided with at least one arc-shaped reversing groove (33) along the circumferential direction. The first end of the reversing lever (4) extends out of the outer shell of the glue applicator. The second end of the reversing lever (4) is provided with a reversing top block (44) extending toward the reversing drive gear (3). One end of the reversing groove (33) is the forward rotation limit end (331) and the other end is the reverse rotation limit end (332). The reversing top block (44) abuts against the forward rotation limit end (331) and the reverse rotation limit end (332) respectively. The gluing machine is equipped with a forward rotation working state and a reverse rotation working state. In the forward rotation working state, the end face of the reversing top block (44) faces the reverse direction of the drive motor (2), and in the reverse rotation working state, the end face of the reversing top block (44) faces the forward rotation direction of the drive motor (2).

2. The improved turner mechanism tacking machine according to claim 1, wherein: The second end of the reversing lever (4) is provided with two reversing top blocks (44). The two reversing top blocks (44) are spaced apart from the rotation axis of the reversing lever (4). The two reversing top blocks (44) respectively abut against the forward rotation limit end (331) and the reverse rotation limit end (332) of the reversing groove (33).

3. A taping machine with improved commutating mechanism according to claim 2, characterized in that: The reversing lever (4) includes an integrally formed operating part (41), a connecting part (42), a rotating part (43), and two reversing top blocks (44). The operating part (41) and the connecting part (42) are integrally formed, and the connecting part (42) and the rotating part (43) are integrally formed. The two reversing top blocks (44) are respectively arranged at intervals along the circumferential direction on the outer side of the rotating part (43). The rotating part (43) is rotatably mounted on the side of the reversing drive gear (3). The operating part (41) extends out of the outer shell of the glue applicator.

4. A taping machine with improved commutating mechanism according to claim 3, characterized in that: The center of the rotating part (43) is provided with a rotating hole (431), and an elastic groove (432) communicating with the rotating hole (431) is provided on one side of the rotating part (43).

5. The improved turner mechanism taping machine of claim 2, wherein: The clamping angle between the two reversing top blocks (44) is 45-100°.

6. The improved turner mechanism taping machine of claim 2 wherein: The outer side of the reversing drive gear (3) is provided with two reversing grooves (33). The two reversing grooves (33) are symmetrically arranged along the rotation axis of the reversing drive gear (3). The forward rotation limiting end (331) and the reverse rotation limiting end (332) of the two reversing grooves (33) respectively abut against the reversing top block (44).

7. A gluing machine with an improved reversing mechanism according to any one of claims 2 to 6, characterized in that: In the forward rotation operating state, the first reversing top block (44) is inserted into the reversing slot (33) with its end face facing the direction of the reverse rotation of the drive motor (2), and the second reversing top block (44) is away from the reversing slot (33). When the drive motor (2) rotates forward, the reverse limiting end (332) of the reversing slot (33) abuts against the side of the first reversing top block (44), and the first reversing top block (44) moves out of the reversing slot (33). When the drive motor (2) reverses, the forward rotation limit end (331) of the reversing slot (33) abuts against the end face of the first reversing top block (44) to realize the forward rotation of the drive motor (2); In the reverse operating state, the second reversing top block (44) is inserted into the reversing slot (33) with the end face of the reversing top block (44) facing the direction of the forward rotation of the drive motor (2), and the first reversing top block (44) is away from the reversing slot (33). When the drive motor (2) reverses, the forward rotation limit end (331) of the reversing slot (33) abuts against the side of the second reversing top block (44), and the second reversing top block (44) moves out of the reversing slot (33). When the drive motor (2) rotates forward, the reverse limit end (332) of the reversing slot (33) abuts against the end of the second reversing top block (44) to achieve the reverse rotation of the drive motor (2).

8. A taping machine with improved commutating mechanism according to claim 7, characterized in that: The frame (1) has a reversing slide groove (11), and the reversing lever (4) passes through the reversing slide groove (11). The inner side of the middle part of the reversing slide groove (11) is provided with a limiting protrusion (12). The reversing lever (4) and the two sides of the limiting protrusion (12) abut against each other. When the reversing lever (4) is located on the first side of the limiting protrusion (12), the glue applicator enters the forward rotation working state. When the reversing lever (4) is located on the second side of the limiting protrusion (12), the glue applicator enters the reverse rotation working state.

9. A taping machine with improved commutating mechanism according to claim 8, characterized in that: The frame (1) is also provided with an L-shaped locking groove (13), which includes a horizontal groove (131) and a vertical groove (132). The first end of the horizontal groove (131) is connected to the reversing slide (11), and the second end of the horizontal groove (131) is connected to the first end of the vertical groove (132). The second end of the vertical groove (132) extends toward the first end of the reversing slide (11). The vertical groove (132) is parallel to and spaced apart from the reversing slide (11). When the reversing lever (4) is located in the vertical groove (132), the glue applicator enters the forward rotation working state.

10. The improved turner mechanism of claim 7, wherein: Roller gears (51) are fixedly installed at the same end of the two rubber rollers (5), and the two roller gears (51) mesh with each other. A reversing transmission gear (6) is rotatably installed on the frame (1). The reversing transmission gear (6) meshes with any one of the roller gears (51). A gear part (31) is provided at the first end of the reversing drive gear (3), and a fixing part (32) is provided at the second end of the reversing drive gear (3). The fixing part (32) is fixedly connected to or integrally formed with the output shaft of the drive motor (2). The gear part (31) meshes with the reversing transmission gear (6). The reversing groove (33) is provided in the middle of the reversing drive gear (3). A rotating protrusion (61) is provided at the center of the reversing transmission gear (6) facing the reversing groove (33). The reversing lever (4) is rotatably installed on the rotating protrusion (61).

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