Steel belt feeding device

By introducing extrusion and leveling mechanisms into the steel strip feeding device, and utilizing the gear pair transmission of the drive roller and pressure roller, as well as the cooperation of the upper and lower roller units, the problem of poor steel strip flatness is solved, thereby improving the accuracy of stamping and the flatness of the steel strip.

CN223655899UActive Publication Date: 2025-12-12LUOYANG YANZHAO EQUIP MFG CO LTD
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Patent Information

Application Number
CN202423310994.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-12-31
Publication Date
2025-12-12
Estimated Expiration
2034-12-31

AI Technical Summary

Technical Problem

The existing steel strip feeding device has poor steel strip straightness during the conveying process, which leads to a reduction in the accuracy of subsequent stamping processing.

Method used

A steel strip feeding device was designed, which includes an extrusion mechanism and a leveling mechanism. Through the gear pair transmission of the drive roller and the pressure roller, combined with the cooperation of the upper and lower roller units, the steel strip is leveled and conveyed. The channel size is adjusted by the pre-tensioning component to ensure the straightness of the steel strip.

Benefits of technology

This improves the straightness of the steel strip, enhances the precision of subsequent stamping processes, and ensures that the surface of the steel strip is not easily worn.

✦ Generated by Eureka AI based on patent content.

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Abstract

According to the steel belt feeding device, an extrusion mechanism comprises a pressing roller and a driving roller which are arranged up and down, a first channel is reserved between the driving roller and the pressing roller, one end of the driving roller is connected with a motor used for driving the driving roller, and the driving roller and the pressing roller are in transmission through a gear pair to assist in conveying a steel belt; the two ends of the pressing roller are rotationally connected with first sliding plates, the first sliding plates are slidably connected with the side plates in a one-to-one correspondence mode, the two ends of the driving roller are rotationally connected with the side plates in a one-to-one correspondence mode, a pre-tightening assembly used for pushing the pressing roller downwards is arranged on the cover plate, and the pre-tightening assembly enables the first sliding plates to slide to the proper positions on the side plates by adjusting pre-tightening force. The size of the first channel is changed to ensure that the steel strip passes through smoothly; and a second channel is reserved between the upper rolling shaft unit and the lower rolling shaft unit which are arranged up and down of the leveling mechanism, the upper rolling shaft unit and the lower rolling shaft unit can press the steel belt with the radian, the straightness of the steel belt is improved, and the machining precision is improved in the subsequent stamping machining process.
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Description

TECHNICAL FIELD

[0001] The utility model relates to steel band feeding technical field, and specifically relates to a steel band feeding device. BACKGROUND

[0002] Steel furniture is a kind of common furniture, and the steel furniture is usually composed of steel plates, and the steel plates are processed into furniture parts by stamping, bending and shearing of steel bands.The feeding device is usually used to convey the steel band to the stamping machine for stamping forming, the existing feeding device includes at least one set of upper and lower distribution driving roller and pressure roller, the steel band passes between the driving roller and the pressure roller, and the steel band is conveyed to the stamping machine by the friction of the driving roller and the pressure roller to the steel band.However, since the steel band is unwound from the steel coil, it will have a certain arc, therefore, although the existing steel band feeding device can realize the conveying of the steel band, the flatness of the steel band is poor, and the machining precision is easily reduced in the subsequent stamping process. SUMMARY

[0003] In order to solve the problem of poor flatness of the steel band during conveying in the prior art, which easily causes surface wear of the steel band, the utility model provides a steel band feeding device, which improves the flatness of the steel band and improves the machining precision in the subsequent stamping process.

[0004] The utility model discloses a steel band feeding device, including the bearing box, two opposite side plates are fixedly arranged on the bearing box top, the cover plate that is parallel with the top of bearing box is connected between two side plates, at least one extrusion mechanism for extruding steel band and at least one flattening mechanism for flattening steel band are arranged between two side plates;

[0005] The extrusion mechanism includes an upper and lower pressure roller and a driving roller, and a first channel is left between the driving roller and the pressure roller, one end of the driving roller is connected with a motor for driving the driving roller, and the driving roller and the pressure roller are driven by a gear pair, both ends of the pressure roller are rotatably connected with a first sliding plate, the first sliding plate is slidably connected with the side plate one by one, both ends of the driving roller are rotatably connected with the side plate one by one, and a pre-tightening assembly for pushing the pressure roller downward is arranged on the cover plate;

[0006] The flattening mechanism includes an upper and lower upper roller unit and lower roller unit, and a second channel is left between the upper roller unit and the lower roller unit, and the upper roller unit and the lower roller unit are rotatably connected with the side plate.

[0007] As a further optimization of the utility model kind steel band feeding device: the feeding device includes two first extension plates, the first extension plate is connected with the side plate one by one, the transition roller and the slide rail are arranged between the two first extension plates, the through hole is opened in the first extension plate for the roller shaft of the transition roller to pass through, the two pipe position wheels are slidably arranged on the slide rail, and the steel band can pass through between the two pipe position wheels.

[0008] As a further optimization of the utility model kind steel band feeding device: the feeding device includes two second extension plates, the second extension plate is connected with the side plate one by one, the mounting shaft is arranged between the two second extension plates, the two blocking wheels are sleeved on the mounting shaft, the blocking wheel is coaxially connected with the positioning ring, and the positioning ring is sleeved on the mounting shaft, and the positioning bolt is penetrated on the positioning ring.

[0009] As a further optimization of the utility model kind steel band feeding device: the upper roller unit includes a plurality of first rollers uniformly distributed along a first straight line, the lower roller unit includes a plurality of second rollers distributed along a second straight line, and a distance is left between the first roller and the second roller, the two ends of the second roller are fixedly sleeved with A gear, the inner side of the side plate is rotatably provided with a plurality of intermediate shafts corresponding to the second rollers, and the intermediate shafts are located below the second rollers, the intermediate shafts are fixedly sleeved with B gears, and the A gears and the B gears are engaged.

[0010] As a further optimization of the utility model kind steel band feeding device: the pre-tightening assembly includes a first adjusting screw and a connecting piece, one end of the first adjusting screw is movably penetrated through the connecting piece and is fixedly connected with the cover plate, the other end of the first adjusting screw is provided with a first adjusting nut, a reset spring is sleeved on the first adjusting screw, one end of the reset spring abuts on the first adjusting nut, the other end of the reset spring abuts on the connecting piece, the connecting piece is movably penetrated through the cover plate and is fixedly connected with the first sliding plate.

[0011] As a further optimization of the utility model kind steel band feeding device: the connecting piece includes two connecting shafts, one end of the two connecting shafts is connected through a connecting plate, and the connecting plate is located above the cover plate, the first adjusting screw is screwed with the cover plate after penetrating through the connecting plate, one end of the reset spring abuts on the connecting plate, and the other end of the two connecting shafts is movably penetrated through the cover plate and is connected with the first sliding plate.

[0012] As a further optimization of the utility model kind steel band feeding device: the two ends of the first roller are rotatably connected with a second sliding plate, the second sliding plate is slidably connected with the side plate, the cover plate is provided with an adjusting assembly, the adjusting assembly includes at least one second adjusting screw, the second adjusting screw is rotatably connected with the second sliding plate after penetrating through the cover plate, and the second adjusting screw is fixed with the cover plate through a second adjusting nut.

[0013] As a further optimization of the utility model kind steel band feeding device: the side plate is provided with the scale bar corresponding with the second adjusting screw rod.

[0014] As a further optimization of the utility model kind steel band feeding device: the cover plate is provided with the pressing plate between the cover plate and the compression roller, the pressing plate is fixedly connected with the first sliding plate, the cover plate is provided with the adjusting handle, the extending shaft is rotatably arranged on the adjusting handle, and the extending shaft is fixedly connected with the pressing plate after penetrating through the cover plate.

[0015] Compared with the prior art, the utility model has the beneficial effects that:

[0016] 1) the utility model discloses a setting extrusion mechanism, the extrusion mechanism includes the compression roller and the driving roller arranged up and down, and the first channel is left between the driving roller and the compression roller, one end of the driving roller is connected with the motor for driving the driving roller, and the driving roller and the compression roller are driven through the gear pair, the motor rotates, drives the driving roller to rotate, and the compression roller drives the driving roller to rotate through the gear pair, which helps to convey the steel band.

[0017] 2) the utility model discloses that the first sliding plate is rotatably connected with the side plate one by one, the two ends of the driving roller are rotatably connected with the side plate one by one, the pre-tightening assembly for pushing down the compression roller is arranged on the cover plate, the pre-tightening assembly can slide the first sliding plate to the appropriate position on the side plate by adjusting the pre-tightening force, so that the size of the first channel is changed, and the smooth passing of the steel band is guaranteed.

[0018] 3) the utility model discloses a setting leveling mechanism, the leveling mechanism includes the upper roller shaft unit and the lower roller shaft unit arranged up and down, and the second channel is left between the upper roller shaft unit and the lower roller shaft unit, and the upper roller shaft unit and the lower roller shaft unit are rotatably connected with the side plate, the upper roller shaft unit and the lower roller shaft unit can press the steel band with the arc, improve the flatness of the steel band, and improve the machining precision in the subsequent stamping process. ACCURACY OF DRAWINGS

[0019] Figure 1 It is the structural schematic diagram of the utility model;

[0020] Figure 2 It is the side view of the utility model;

[0021] Figure 3 It is the distribution schematic diagram of the compression roller, the driving roller and the first roller;

[0022] Figure 4 It is the cooperation schematic diagram of the compression roller, the driving roller, the first roller, the second roller and the intermediate shaft;

[0023] Figure 5 It is the cooperation schematic diagram of the cover plate, the pressing plate and the adjusting handle;

[0024] The markings in the diagram are: 1. Transition roller, 2. Slide rail, 3. Tube position wheel, 4. Drive roller, 5. Pressure roller, 6. First roller, 7. Pressure plate, 8. Adjusting handle, 9. First adjusting screw, 10. Scale bar, 11. Second adjusting screw, 12. Return spring, 13. Connecting plate, 14. Connecting shaft, 15. Mounting shaft, 16. Thrust wheel, 17. Positioning ring, 18. First extension plate, 19. Cover plate, 20. Intermediate shaft, 21. Second adjusting nut, 22. Chain, 23. Second extension plate, 24. Drive gear, 25. B gear, 26. Second roller, 27. A gear, 28. Pressing gear, 29. First sliding plate, 30. Second sliding plate, 31. Side plate, 32. Carrier box, 33. Wheel. Detailed Implementation

[0025] The technical solution of this utility model will be further described in detail below with reference to specific embodiments. Parts not described or disclosed in detail in the following embodiments of this utility model should be understood as prior art known or should be known by those skilled in the art.

[0026] Example 1

[0027] A steel strip feeding device, such as Figures 1 to 5 As shown, the system includes a carrier box 32, with two opposing side plates 31 fixedly mounted on top of the carrier box 32. A cover plate 19, parallel to the top of the carrier box 32, connects the two side plates 31, facilitating the installation of subsequent components on the cover plate 19. During the steel strip conveying process, to ensure the flatness of the steel strip, at least one extrusion mechanism for extruding the steel strip and at least one leveling mechanism for leveling the steel strip are provided between the two side plates 31. Two extrusion mechanisms are provided, distributed along the steel strip conveying direction, and all leveling mechanisms are located between the two extrusion mechanisms.

[0028] The extrusion mechanism includes a pressure roller 5 and a drive roller 4 arranged vertically, with a first channel between the drive roller 4 and the pressure roller 5, allowing the steel strip to enter. One end of the drive roller 4 is connected to a motor for driving it, and the drive roller 4 and the pressure roller 5 are driven by a gear pair. When the motor rotates, it drives the drive roller 4 to rotate as well, and the pressure roller 5, through the gear pair, drives the drive roller 4 to rotate as well. Figure 4As shown, the driving roller 4 is fixedly sleeved with a driving gear 24, and the compression roller 5 is fixedly sleeved with a compression gear 28, and the driving gear 24 and the compression gear 28 form a gear pair. The two ends of the compression roller 5 are rotatably connected with a first sliding plate 29, the first sliding plate 29 is slidably connected with the side plate 31 in one-to-one correspondence, the two ends of the driving roller 4 are rotatably connected with the side plate 31 in one-to-one correspondence, and the cover plate 19 is provided with a pre-tightening assembly for pushing the compression roller 5 downward. The pre-tightening assembly adjusts the pre-tightening force, so that the first sliding plate 29 can slide to the appropriate position on the side plate 31 to change the size of the first channel, so as to ensure that the steel belt passes smoothly. The model of the motor, the driving roller 4, the compression roller 5, the driving gear 24 and the compression gear 28 is the conventional prior art in the field, and will not be described in detail here. The gear pair is the conventional prior art in the field, and will not be described in detail here.

[0029] The flattening mechanism comprises an upper roller unit and a lower roller unit arranged in an upper and lower manner, and a second channel is left between the upper roller unit and the lower roller unit, and the steel belt can pass through the second channel. In order not to affect the work of the upper roller unit and the lower roller unit, the upper roller unit and the lower roller unit are rotatably connected with the side plate 31. The upper roller unit and the lower roller unit can press the steel belt with a certain curvature, thereby improving the flatness of the steel belt and improving the machining precision in the subsequent stamping process.

[0030] The above is the basic embodiment of the present application, which can be further improved, optimized and limited on the basis of the above, so as to obtain the following embodiments:

[0031] Embodiment 2

[0032] This embodiment is an improved scheme based on embodiment 1, and the main structure is the same as that of embodiment 1. The improvement lies in that the feeding device comprises two first extension plates 18, the first extension plates 18 are connected with the side plates 31 in one-to-one correspondence, the two first extension plates 18 are close to the feeding direction, and a transition roller 1 and a sliding rail 2 parallel to each other are arranged between the two first extension plates 18. When conveying the steel belt, the steel belt enters the first channel and the second channel with the help of the transition roller 1. The first extension plate 18 is provided with a through hole for the roller shaft of the transition roller 1 to pass through, facilitating the installation of the transition roller 1. The sliding rail 2 is slidably provided with two pipe position wheels 3, and the steel belt can pass between the two pipe position wheels 3. The distance between the two pipe position wheels 3 can be adjusted according to the actual width of the steel belt, and the steel belt can be flattened to a certain extent when feeding. The specific structure, model and working principle of the pipe position wheel 3, how the pipe position wheel 3 is installed on the sliding rail 2, and the model of the transition roller 1 are the conventional prior art in the field, and will not be described in detail here.

[0033] Embodiment 3

[0034] This embodiment is an improvement on Embodiment 1. Its main structure is the same as Embodiment 1, but the improvement lies in the following: the feeding device includes two second extension plates 23, which are connected one-to-one with the side plates 31. The two second extension plates 23 are close to the discharge direction, and a mounting shaft 15 is provided between them. Two guide wheels 16 are sleeved on the mounting shaft 15. The distance between the two guide wheels 16 is adjusted according to the width of the steel strip, enabling a certain degree of leveling during steel strip discharge. To ensure convenient adjustment of the distance between the guide wheels 16 and convenient fixing of the guide wheels 16 positions, a positioning ring 17 is coaxially connected to the guide wheels 16. The positioning ring 17 is sleeved on the mounting shaft 15, and a positioning bolt passes through the positioning ring 17, fixing the positioning ring 17 to a suitable position on the mounting shaft 15 using the positioning bolt.

[0035] Example 4

[0036] This embodiment is an improvement on embodiment 1. Its main structure is the same as that of embodiment 1, but the improvement lies in: [The following is a more detailed description of the improvement.] Figure 4 As shown, the upper roller unit includes several first rollers 6 evenly distributed along a first straight line, with three first rollers 6 in total. The lower roller unit includes several second rollers 26 distributed along a second straight line, with a distance between the first rollers 6 and the second rollers 26 forming a second channel, and four second rollers 26 in total. A gear 27 is fixedly fitted at both ends of each second roller 26. Multiple intermediate shafts 20, corresponding one-to-one with each second roller 26, are rotatably arranged on the inner side of the side plate 31, with the intermediate shafts 20 located below the second rollers 26. A gear 25 is fixedly fitted on each intermediate shaft 20, and the A gear 27 and B gear 25 mesh with each other. Four second rollers 26 and four intermediate shafts 20 are each used. Two second rollers 26 and two intermediate shafts 20 corresponding to the second rollers 26 form a group with one of the drive rollers 4. One end of each drive roller 4 without a drive gear 24 is fixedly fitted with a transmission gear, and the two transmission gears are driven by a chain 22. In this case, only one motor is required. The motor drives one of the drive rollers 4 and its drive gear 24 to rotate, causing the other drive roller 4 to rotate as well. When the drive gear 24 rotates, a B gear 25 meshes with it. This B gear 25 then rotates, driving the A gear 27 meshed with it to rotate. The rotation direction of the A gear 27 is the same as that of the drive roller 4, and the rotation direction of the second roller 26 is also the same as that of the drive roller 4. The rotation of the A gear 27 then drives the other B gear 25 to rotate, causing the meshed A gear 27 to rotate in the same direction as that of the drive roller 4. The rotation direction of the second roller 26 is also the same as that of the drive roller 4. The operation of the other drive roller 4 is the same.

[0037] Example 5

[0038] This embodiment is an improved scheme based on embodiment 1, and the main structure is the same as that of embodiment 1, and the improvement point is that, as shown in Figure 1 and Figure 2 The pre-tightening assembly includes a first adjusting screw 9 and a connecting piece. One end of the first adjusting screw 9 is movably inserted through the connecting piece and fixedly connected with the cover plate 19. The other end of the first adjusting screw 9 is provided with a first adjusting nut. A return spring 12 is sleeved on the first adjusting screw 9. One end of the return spring 12 abuts against the first adjusting nut, and the other end of the return spring 12 abuts against the connecting piece. The connecting piece is movably inserted through the cover plate 19 and fixedly connected with the first sliding plate 29. By rotating the first adjusting nut on the first adjusting screw 9, the return spring 12 is compressed. At this time, the return spring 12 will move against the connecting piece in order to reset the other end, so that the connecting piece drives the first sliding plate 29 to slide on the side plate 31, thereby changing the distance between the compression roller 5 and the driving roller 4.

[0039] The connecting piece includes two connecting shafts 14. One end of each of the two connecting shafts 14 is connected through a connecting plate 13, and the connecting plate 13 is located above the cover plate 19. The first adjusting screw 9 is screwed with the cover plate 19 after being inserted through the connecting plate 13. One end of the return spring 12 abuts against the connecting plate 13. The other end of each of the two connecting shafts 14 is movably inserted through the cover plate 19 and connected with the first sliding plate 29.

[0040] Embodiment 6

[0041] This embodiment is an improved scheme based on embodiment 1, and the main structure is the same as that of embodiment 1, and the improvement point is that, as shown in

[0042] Embodiment 7

[0043] The embodiment is an improved scheme based on the embodiment 1, the main structure is same with the embodiment 1, and the improvement point is that: in order to adjust the distance between the driving roller 4 and the compression roller 5 when encountering emergency, the pressing plate 7 is arranged between the cover plate 19 and the compression roller 5, the pressing plate 7 is fixedly connected with the first sliding plate 29, the adjusting handle 8 is arranged on the cover plate 19, the extension shaft is rotatably arranged on the adjusting handle 8, and the extension shaft is fixedly connected with the pressing plate 7 after penetrating through the cover plate 19. The part, which is in contact with the cover plate 19, of the adjusting handle 8 is arranged as a circular arc surface, the adjusting spring is sleeved with the part, which penetrates through the cover plate 19, of the extension shaft, the adjusting handle 8 is rotated to drive the extension shaft to move to a certain extent, thereby driving the pressing plate 7 to move to a certain extent, and the two ends of the adjusting spring are respectively connected with the pressing plate 7 and the bottom surface of the cover plate 19, so as to help the pressing plate 7 to reset.

[0044] The above description of disclosed embodiments enables those skilled in the art to carry out or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A steel strip feeding device, comprising a carrier box (32), two opposing side plates (31) fixedly disposed above the carrier box (32), and a cover plate (19) parallel to the top of the carrier box (32) connected between the two side plates (31), characterized in that: At least one extrusion mechanism for extruding steel strip and at least one leveling mechanism for leveling steel strip are provided between the two side plates (31); The extrusion mechanism includes a pressure roller (5) and a drive roller (4) arranged vertically, and a first channel is left between the drive roller (4) and the pressure roller (5). One end of the drive roller (4) is connected to a motor for driving the drive roller (4), and the drive roller (4) and the pressure roller (5) are driven by a gear pair. The two ends of the pressure roller (5) are rotatably connected to a first slide plate (29). The first slide plate (29) is slidably connected to the side plate (31) in a one-to-one correspondence. The two ends of the drive roller (4) are rotatably connected to the side plate (31) in a one-to-one correspondence. A pre-tightening component for pushing the pressure roller (5) downward is provided on the cover plate (19). The leveling mechanism includes an upper roller unit and a lower roller unit arranged vertically, and a second channel is left between the upper roller unit and the lower roller unit. Both the upper roller unit and the lower roller unit are rotatably connected to the side plate (31).

2. The steel strip feeding device as described in claim 1, characterized in that: The feeding device includes two first extension plates (18), which are connected one-to-one with the side plate (31). A transition roller (1) and a slide rail (2) are arranged between the two first extension plates (18). The first extension plate (18) has a through hole for the roller shaft of the transition roller (1) to pass through. Two tube rollers (3) are slidably arranged on the slide rail (2). The steel belt can pass between the two tube rollers (3).

3. The steel strip feeding device as described in claim 1, characterized in that: The feeding device includes two second extension plates (23), which are connected to the side plate (31) in a one-to-one correspondence. An installation shaft (15) is provided between the two second extension plates (23). Two retaining wheels (16) are sleeved on the installation shaft (15). A positioning ring (17) is coaxially connected to the retaining wheel (16), and the positioning ring (17) is sleeved on the installation shaft (15). A positioning bolt is passed through the positioning ring (17).

4. The steel strip feeding device as described in claim 1, characterized in that: The upper roller unit includes several first rollers (6) evenly distributed along a first straight line, and the lower roller unit includes several second rollers (26) distributed along a second straight line. There is a distance between the first rollers (6) and the second rollers (26). Both ends of the second rollers (26) are fixedly fitted with gear A (27). The inner side of the side plate (31) is rotatably provided with several intermediate shafts (20) that correspond one-to-one with the second rollers (26). The intermediate shafts (20) are located below the second rollers (26). Gear B (25) is fixedly fitted on the intermediate shafts (20). Gear A (27) and gear B (25) mesh with each other.

5. The steel strip feeding device as described in claim 1, characterized in that: The pre-tightening assembly includes a first adjusting screw (9) and a connector. One end of the first adjusting screw (9) passes through the connector and is fixedly connected to the cover plate (19). The other end of the first adjusting screw (9) is provided with a first adjusting nut. A return spring (12) is sleeved on the first adjusting screw (9). One end of the return spring (12) abuts against the first adjusting nut, and the other end of the return spring (12) abuts against the connector. The connector passes through the cover plate (19) and is fixedly connected to the first sliding plate (29).

6. The steel strip feeding device as described in claim 5, characterized in that: The connector includes two connecting shafts (14), one end of which is connected by a connecting plate (13), and the connecting plate (13) is located above the cover plate (19). The first adjusting screw (9) passes through the connecting plate (13) and is screwed to the cover plate (19). One end of the reset spring (12) rests on the connecting plate (13), and the other ends of the two connecting shafts (14) move through the cover plate (19) and are connected to the first sliding plate (29).

7. The steel strip feeding device as described in claim 4, characterized in that: The first roller (6) is rotatably connected to the two ends of the second slide plate (30), the second slide plate (30) is slidably connected to the side plate (31), and the cover plate (19) is provided with an adjustment assembly, the adjustment assembly including at least one second adjustment screw (11), the second adjustment screw (11) passes through the cover plate (19) and is rotatably connected to the second slide plate (30), and the second adjustment screw (11) is fixed to the cover plate (19) by the second adjustment nut (21).

8. The steel strip feeding device as described in claim 7, characterized in that: The side plate (31) is provided with a scale bar (10) corresponding to the second adjusting screw (11).

9. The steel strip feeding device as described in claim 1, characterized in that: A pressure plate (7) is provided between the cover plate (19) and the pressure roller (5). The pressure plate (7) is fixedly connected to the first slide plate (29). An adjustment handle (8) is provided on the cover plate (19). An extension shaft is rotatably provided on the adjustment handle (8). The extension shaft passes through the cover plate (19) and is fixedly connected to the pressure plate (7).