A continuous conveyor based on feeding of plastic handles

Abstract

The application discloses a continuous conveyor based on plastic handle feeding, which comprises a shell and a cutting device, and further comprises an upper clamping plate, a lower clamping plate and a lifting pipe, a lifting rod is fixedly connected with the upper clamping plate, a connecting frame is slidably arranged on the lifting pipe, a fixed rod is fixedly arranged on the upper clamping plate, the connecting frame is slidably connected with the fixed rod, the connecting frame is slid downward relative to the upper clamping plate, the tensioning rod slides downward and simultaneously slides transversely under the guidance of the protrusion and the inclined groove, two handles are tensioned, and the connection positions of the two handles are opposite to the cutting knife on the cutting device, the accuracy of the cutting position is improved, meanwhile, the upper clamping plate and the lower clamping plate clamp the two handles through the linkage assembly and the guide assembly, and the handles are straightened by sliding, the stability during the cutting process of the handle connection position is ensured, and the cutting quality of the handle connection position is improved.

Description

A continuous conveyor based on plastic handle feeding Technical Field

[0001] This invention relates to the field of material feeding and conveying equipment technology, and specifically to a continuous conveyor based on a plastic handle for feeding. Background Technology

[0002] As an automated material conveying and precise feeding device, the core function of the plastic handle feeding device is to solve the problem of efficient and orderly supply of plastic handles in mass production.

[0003] In some packaging industries, such as for plastic handles used for cardboard boxes, in order to improve production efficiency, reduce production costs, and facilitate subsequent transportation, multiple handles are usually connected together during production to form a row of handles, which are then cut when assembled with the cardboard box.

[0004] During the assembly process, the plastic handle feeding device can transport the row of plastic handles to the designated position. Then, the cutting knife in the device cuts off the connection of the row of handles, and then presses the individual handles into the handle holes of the carton to complete the assembly of the handles and the carton.

[0005] In the existing technology, when the feeding device cuts the row of handles, the handles used for cartons are made of plastic and are relatively soft. They are prone to deformation during feeding. If a single cutter is used, the joint of the handle will remain stuck to the handle after cutting, making it inconvenient to hold during use. If multiple cutters are used to cut the joint, it is difficult to accurately align with the joint of the handle, affecting the cutting quality and even damaging the handle. Summary of the Invention

[0006] The purpose of this invention is to provide a continuous conveyor based on a plastic handle for feeding, so as to overcome the above-mentioned shortcomings of the prior art.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A continuous conveyor based on a plastic handle for feeding includes a housing and a cutting device, as well as an upper clamping plate, a lower clamping plate and a lifting pipe. A lifting rod is fixedly connected to the upper clamping plate. A connecting frame is slidably mounted on the lifting pipe. A fixing rod is fixedly mounted on the upper clamping plate. The connecting frame is slidably connected to the fixing rod. A guide column is fixedly mounted on the connecting frame. A tensioning rod is slidably mounted on the guide column. A protrusion is fixedly mounted on the tensioning rod. An inclined groove is provided on the upper clamping plate. The protrusion is slidably mounted in the inclined groove.

[0009] It also includes a linkage component, which, after the tensioning rod tensions the connection position of the handle, causes the upper clamping plate and the lower clamping plate to slide relative to each other to clamp the handle;

[0010] The guide assembly, after the upper and lower clamps clamp the handle, allows the upper and lower clamps to slide laterally, straightening the handle.

[0011] Preferably, a first spring is provided between the connecting frame and the tensioning rod, and the two ends of the first spring are fixedly connected to the connecting frame and the tensioning rod, respectively.

[0012] Preferably, a support plate is fixedly provided on the housing, a sliding seat is slidably provided on the support plate, and connecting blocks are fixedly provided on both the lifting tube and the lower clamping plate, and are slidably connected to the sliding seat through the connecting blocks.

[0013] Preferably, the linkage component includes a fixed seat fixedly mounted on the sliding seat, a rotating plate rotatably mounted on the fixed seat, two arc-shaped grooves provided on the rotating plate, and protruding rods fixedly mounted on both connecting blocks. The two protruding rods correspond one-to-one with the two arc-shaped grooves, and the protruding rods are slidably mounted in the arc-shaped grooves.

[0014] Preferably, a first torsion spring is provided between the rotating plate and the fixed base.

[0015] Preferably, the guide assembly includes a vertical plate fixedly mounted on the support plate, the vertical plate being provided with a guide groove, and one end of the connecting frame being slidably mounted in the guide groove.

[0016] Preferably, the guide groove includes a vertical portion and a horizontal portion.

[0017] Preferably, a second spring is provided between the support plate and the sliding seat, and the two ends of the second spring are fixedly connected to the support plate and the sliding seat respectively.

[0018] Preferably, the cutting device is rotatably and fixedly equipped with a cutting blade, which has two cutting edges corresponding to the two ends of the handle connection.

[0019] Preferably, a pressure rod is rotatably mounted on the cutting device, and the pressure rod is rotatably connected to the connecting frame;

[0020] A second torsion spring is provided between the pressure rod and the cutting device.

[0021] In the above technical solution, the continuous conveyor based on plastic handle feeding provided by the present invention has the following beneficial effects:

[0022] By sliding the connecting bracket downward relative to the upper clamping plate, the tensioning rod slides downward and laterally under the guidance of the protrusion and the inclined groove, tensioning the two handles and aligning the connection point of the two handles with the cutting blade on the cutting device, thus improving the accuracy of the cutting position. At the same time, the linkage component and the guide component clamp the two handles with the upper and lower clamping plates and slide to straighten the handles, ensuring the stability of the cutting process at the handle connection point and improving the cutting quality at the handle connection point.

[0023] It should be understood that the foregoing general description and the following detailed description are exemplary and illustrative only, and are not intended to limit this disclosure.

[0024] This application provides an overview of various implementations or examples of the technology described in this disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technology. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0026] Figure 1 is a schematic diagram of the overall structure provided in an embodiment of the present invention;

[0027] Figure 2 is a schematic diagram of the internal structure of the shell provided in an embodiment of the present invention;

[0028] Figure 3 is an enlarged view of point A in Figure 2 provided in an embodiment of the present invention;

[0029] Figure 4 is a schematic diagram of the cutting device structure provided in an embodiment of the present invention;

[0030] Figure 5 is a structural schematic diagram of the upper clamping plate, lower clamping plate, sliding seat and vertical plate provided in an embodiment of the present invention;

[0031] Figure 6 is a structural schematic diagram of the linkage component, upper clamping plate and lower clamping plate provided in an embodiment of the present invention;

[0032] Figure 7 is a schematic diagram of the internal structure of the upper clamping plate provided in an embodiment of the present invention;

[0033] Figure 8 is a schematic diagram of the pressure bar structure provided in an embodiment of the present invention;

[0034] Figure 9 is a schematic diagram of the handle connection, cutting position and clamping position provided in the embodiment of the present invention.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1. Housing; 2. Upper clamping plate; 21. Inclined groove; 22. Tensioning rod; 23. Protrusion; 24. Fixing rod; 3. Lower clamping plate; 31. Connecting block; 32. Protruding rod; 4. Lifting pipe; 41. Connecting frame; 42. Guide column; 43. First spring; 5. Support plate; 51. Sliding seat; 52. Fixing seat; 53. Rotating plate; 54. Arc groove; 55. First torsion spring; 56. Second spring; 6. Vertical plate; 61. Vertical part; 62. Horizontal part; 7. Cutting device; 71. Cutting knife; 72. Pressure rod; 73. Second torsion spring; 8. Feeding component; 81. Actuating component; 9. Conveying component. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0038] Please refer to 1-9. A continuous conveyor based on plastic handle feeding includes a housing 1 and a cutting device 7, and also includes an upper clamping plate 2, a lower clamping plate 3, and a lifting pipe 4. The lifting rod is fixedly connected to the upper clamping plate 2. A connecting frame 41 is slidably arranged on the lifting pipe 4. A fixing rod 24 is fixedly arranged on the upper clamping plate 2. The connecting frame 41 is slidably connected to the fixing rod 24. A guide post 42 is fixedly arranged on the connecting frame 41. A tensioning rod 22 is slidably arranged on the guide post 42. A protrusion 23 is fixedly arranged on the tensioning rod 22. The upper clamping plate 2... The upper part is provided with an inclined groove 21, and the protrusion 23 is slidably disposed in the inclined groove 21; it also includes a linkage component, which, after the tensioning rod 22 tensions the connection position of the handle, causes the upper clamping plate 2 and the lower clamping plate 3 to slide relative to each other to clamp the handle; a guide component, which, after the upper clamping plate 2 and the lower clamping plate 3 clamp the handle, causes the upper clamping plate 2 and the lower clamping plate 3 to slide laterally to straighten the handle, and the handle moves to below the cutting device 7 under the action of the feeding component 8. By the downward movement of the cutting device 7, the connecting frame 41 relative to the lifting tube 4 and As the upper clamping plate 2 moves downward, the connecting frame 41 moves downward, and through the guide column 42, the tensioning rod 22 moves downward to between the two handles. During the downward movement, under the action of the protrusion 23 and the inclined groove 21, it slides laterally, so that the two tensioning rods 22 abut against the handles on both sides and push them. By controlling the distance between the two handles, the connection between the two handles is aligned with the cutting blade 71 on the cutting device 7, improving the cutting accuracy at the handle connection. After the cutting blade 71 is aligned with the handle connection, the connecting frame 41 continues to move downward. Through the linkage component, the upper clamping plate 2 and the lower clamping plate 3 slide relative to each other to clamp the two handles, ensuring the stability of the handles during the cutting process at the handle connection. At the same time, through the guide component, the upper clamping plate 2 and the lower clamping plate 3 straighten the handles after clamping them, avoiding the deformation of the handles caused by the bending of the handles themselves when the cutting blade 71 applies pressure to the handle connection, which would affect the cutting accuracy. This effectively improves the cutting quality at the handle connection.

[0039] Specifically, a first spring 43 is provided between the connecting frame 41 and the tensioning rod 22. The two ends of the first spring 43 are fixedly connected to the connecting frame 41 and the tensioning rod 22 respectively. When the connecting frame 41 moves down relative to the lifting tube 4 and the upper clamping plate 2, the tensioning rod 22 is moved down and slid open by the guide post 42. During this process, the first spring 43 is compressed. After the handle connection is cut off, the tensioning rod 22 and the connecting frame 41 are reset relative to the lifting tube 4 and the upper clamping plate 2 by the rebound of the first spring 43.

[0040] In a further embodiment of the present invention, a support plate 5 is fixedly provided on the housing 1, and a sliding seat 51 is slidably provided on the support plate 5. A connecting block 31 is fixedly provided on both the lifting tube 4 and the lower clamping plate 3, and is slidably connected to the sliding seat 51 through the connecting block 31. After the tensioning rod 22 moves down so that the connection between the two handles is aligned with the position of the cutting blade 71, the upper clamping plate 2 and the lower clamping plate 3 clamp the two handles. The lifting tube 4 and the upper clamping plate 2 move down through the connecting block 31 on the lifting tube 4, and the lower clamping plate 3 moves up through the connection between the connecting block 31 on the lower clamping plate 3 and the sliding seat 51. In this way, the upper clamping plate 2 and the lower clamping plate 3 clamp the two handles.

[0041] Furthermore, the linkage component includes a fixed seat 52 fixedly mounted on the sliding seat 51, a rotating plate 53 rotatably mounted on the fixed seat 52, two arc-shaped grooves 54 on the rotating plate 53, and protruding rods 32 fixedly mounted on both connecting blocks 31. The two protruding rods 32 correspond one-to-one with the two arc-shaped grooves 54, and the protruding rods 32 are slidably mounted in the arc-shaped grooves 54. After the connecting frame 41 slides and the handle connection is aligned with the cutting blade 71, the connecting frame 41 continues to move downward with the lifting tube 4. During the downward movement, the rotating plate 53 slides due to the squeezing action of the protruding rods 32 on the connecting block 31 on the lifting tube 4 and the corresponding arc-shaped grooves 54. At the same time, the rotation of the rotating plate 53 causes the other arc-shaped groove 54 to squeeze and cooperate with the protruding rods 32 on the connecting block 31 on the lower clamping plate 3, causing the lower clamping plate 3 to move upward. Thus, while the lifting tube 4 and the upper clamping plate 2 move downward, the lower clamping plate 3 moves upward, completing the clamping of the two handles.

[0042] Furthermore, a first torsion spring 55 is provided between the rotating plate 53 and the fixed base 52. Under the action of the first torsion spring 55, the connecting frame 41 moves down, completing the sliding of the tension rod 22, so that the handle connection is aligned with the position of the cutting blade 71. During this process, the lifting tube 4 and the upper clamping plate 2 remain stationary under the action of the first torsion spring 55. After alignment, the connecting frame 41 abuts against the lifting tube 4. At this time, the connecting frame 41 continues to move down, which will push the lifting tube 4 to move down. At this time, the lifting tube 4 moves down with the connecting block 31 and the protruding rod 32. Through the pressing cooperation between the protruding rod 32 and the corresponding arc groove 54, the rotating plate 53 overcomes the force of the torsion spring and rotates. When the rotating plate 53 rotates, through the pressing action between another arc groove 54 and the corresponding protruding rod 32, the lower clamping plate 3 moves up. During this process, by driving the connecting frame 41 to move down, the sliding of the tension rod 22 and the sliding of the upper clamping plate 2 and the lower clamping plate 3 can be completed to clamp the handle.

[0043] In a further embodiment of the present invention, the guide assembly includes a vertical plate 6 fixedly mounted on a support plate 5. A guide groove is provided on the vertical plate 6. One end of the connecting frame 41 is slidably disposed within the guide groove. The guide groove includes a vertical portion 61 and a horizontal portion 62. When the connecting frame 41 slides, the tension rod 22 slides, aligning the handle connection with the cutting blade 71. The connecting frame 41 remains on the vertical portion 61. At this point, the connecting frame 41 continues to move downwards, causing the upper clamping plate 2 and the lower clamping plate 3 to clamp the two handles. After the upper clamping plate 2 and the lower clamping plate 3 clamp the two handles, one end of the connecting frame 41 is located on the vertical portion 61 and... At the connection point of the horizontal part 62, the vertical part 61 enhances the stability of the connecting frame 41 during the sliding process. At the same time, by setting the horizontal part, after the upper clamping plate 2 and the lower clamping plate 3 complete the clamping of the handle, the connecting frame 41, under the guidance of the horizontal part 62, pushes the sliding seat 51 to slide laterally, while simultaneously sliding the lifting tube 4, the upper clamping plate 2 and the lower clamping plate 3 laterally, thus straightening the handle and preventing the handle itself from bending. This would prevent the cutting blade 71 from causing instability of the handle due to the squeezing between the cutting blade 71 and the handle connection when cutting at the handle connection, thus ensuring the cutting quality at the handle connection.

[0044] In the embodiment provided by the present invention, a second spring 56 is provided between the support plate 5 and the sliding seat 51. The two ends of the second spring 56 are fixedly connected to the support plate 5 and the sliding seat 51 respectively. When the sliding seat 51 slides and the handle is straightened, the second spring 56 is compressed. After the handle connection is cut off, the sliding seat 51 is reset and slid under the action of the second spring 56.

[0045] Specifically, a cutting blade 71 is rotatably and fixedly mounted on the cutting device 7. The cutting blade 71 has two cutting edges, which correspond to the two ends of the handle connection. The cutting blade 71 has two cutting edges, which can cut the two ends of the handle connection separately, avoiding the connection being cut by a single cutting edge, which would cause the cut connection to still be on the handle, forming a burr-like protrusion, affecting the grip experience during use, thus improving the comfort of the handle. The connecting frame 41 moves down relative to the lifting tube 4, causing the tension rod 22 to slide. That is, by controlling the distance between the two handles through the tension rod 22, the two ends of the handle connection are aligned with the two cutting edges on the cutting blade 71 (the two ends of the handle connection, i.e., the aligned positions of the two cutting edges, are shown by the dotted lines in Figure 9).

[0046] In a further embodiment of the present invention, a pressure rod 72 is rotatably mounted on the cutting device 7, and the pressure rod 72 is rotatably connected to the connecting frame 41. A second torsion spring 73 is provided between the pressure rod 72 and the cutting device 7. When the cutting device 7 moves downward, the pressure rod 72 presses down on the connecting frame 41, completing the sliding of the tension rod 22 and the clamping of the two handles by the upper clamping plate 2 and the lower clamping plate 3 (the clamping position is shown in Figure 9). After the upper clamping plate 2 and the lower clamping plate 3 have completed clamping the handles, one end of the connecting frame 41 is located at the connection position of the vertical part 61 and the horizontal part 62. At this time, the cutting blade 71 contacts the connection point of the handle. The cutting device 7 continues to move downward, and under the action of the guide seat of the horizontal part 62... The connecting frame 41, lifting rod, sliding seat 51, upper clamping plate 2, and lower clamping plate 3 slide to straighten the handle. During the straightening process, the cutting blade 71 cuts the handle connection. As the handle is straightened, relative sliding occurs between the handle connection and the blade, improving the cutting effect. The pulling force of the upper clamping plate 2 and lower clamping plate 3 on the handle ensures its stability. Soft pads are placed at the contact points between the upper clamping plate 2 and lower clamping plate 3 and the handle. After the handle is straightened, the upper clamping plate 2 and lower clamping plate 3 continue to slide with the sliding seat 51 while the handle remains stationary. At this time, the friction between the upper clamping plate 2 and lower clamping plate 3 and the handle will not affect the handle.

[0047] In this invention, the feeding component 8, the actuating component 81, and the conveying component 9 mentioned are all prior art. The feeding component 8 is used to complete the cooperation between the handle and the cutting blade 71. The actuating component 81 is used to move the handle cut at the connection point onto the conveying component. The conveying component is used to transport the handle to the next process. It will not be described in detail. The up and down movement of the cutting device 7 is also driven by prior art. It will not be described in detail. Meanwhile, Figure 9 shows the clamping positions of the upper clamping plate 2 and the lower clamping plate 3, the contact position of the tensioning rod 22 with the handle, and the connection point of the handle and the positions of the two ends of the connection point corresponding to the blade.

[0048] Working principle: When the handle is being fed and cut, the feeding component 8 sends the handle below the cutting device 7. The cutting device 7 moves downward, and the connecting frame 41 moves downward through the pressure rod 72. At this time, under the action of the first torsion spring 55, the lifting tube 4, the upper clamping plate 2, and the lower clamping plate 3 remain stationary, while the connecting frame 41 moves downward relative to the upper clamping plate 2. It also moves downward through the guide column 42, causing the tensioning rod 22 to move downward. During this process, under the action of the protrusion 23 and the inclined groove 21, the tensioning rod 22 moves downward and opens to both sides. The contact and tension of the two handles align the connection point between them with the cutting blade 71, compressing the first spring 43. After the connecting frame 41 completes its downward movement, i.e., after the connection point between the handles aligns with the cutting blade 71, the connecting frame 41 abuts against the lifting tube 4 and the upper clamping plate 2. As the cutting device 7 continues to move downward, the connecting frame 41 pushes the upper clamping plate 2 and the lifting tube 4 downward. During this downward movement, the protruding rod 32 on the connecting block 31 and the arc-shaped groove 54 exert mutual pressure, causing the rotating plate 53 to overcome the first torsion spring 55. The force rotates the plate, and simultaneously, through the squeezing action of another arc-shaped groove 54 and another protrusion 23, the lower clamping plate 3 slides upward. That is, in this process, the rotating plate 53 rotates, and the upper clamping plate 2 and the lower clamping plate 3 slide relative to each other, clamping the two handles. After clamping is completed, one end of the connecting frame 41 moves to the connection point between the vertical part 61 and the horizontal part 62. At the same time, the cutting blade 71 of the cutting device 7 also contacts the connection position of the handle. The cutting device 7 continues to move downward, and under the guidance of the horizontal part 62, the pressure rod 72 overcomes the force. The force of the second torsion spring 73 rotates the tube and pushes the lifting tube 4, the upper clamping plate 2, the lower clamping plate 3 and the sliding seat 51 to slide through the connecting frame 41, and compresses the second spring 56. At the same time, the cutting knife 71 cuts the connection between the two handles. After the cutting is completed, the cutting device 7 moves up to reset, and cooperates with the reset of the second spring 56, the first torsion spring 55, the second torsion spring 73 and the first spring 43 to complete the reset of the sliding seat 51, the lifting tube 4, the upper clamping plate 2, the lower clamping plate 3 and the tensioning rod 22.

[0049] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A continuous conveyor based on a plastic handle for feeding, comprising a housing (1) and a cutting device (7), characterized in that, It also includes an upper clamping plate (2), a lower clamping plate (3), and a lifting pipe (4). The lifting pipe (4) is fixedly connected to the upper clamping plate (2). A connecting frame (41) is slidably mounted on the lifting pipe (4). A fixing rod (24) is fixedly mounted on the upper clamping plate (2). The connecting frame (41) is slidably connected to the fixing rod (24). A guide column (42) is fixedly mounted on the connecting frame (41). A tensioning rod (22) is slidably mounted on the guide column (42). The upper clamping plate (2) is fixedly provided with a protrusion (23), and the upper clamping plate (2) is provided with a groove (21). The protrusion (23) is slidably disposed in the groove (21). It also includes a linkage component, which, after the tensioning rod (22) tensions the connection position of the handle, causes the upper clamping plate (2) and the lower clamping plate (3) to slide relative to each other to clamp the handle; and a guide component, which, after the upper clamping plate (2) and the lower clamping plate (3) clamp the handle, causes the upper clamping plate (2) and the lower clamping plate (3) to slide laterally to straighten the handle. A support plate (5) is fixedly installed on the housing (1), and a sliding seat (51) is slidably installed on the support plate (5). A connecting block (31) is fixedly installed on both the lifting tube (4) and the lower clamping plate (3), and is slidably connected to the sliding seat (51) through the connecting block (31). The linkage component includes a fixed seat (52) fixedly installed on the sliding seat (51), a rotating plate (53) rotatably installed on the fixed seat (52), and two arc grooves (54) are provided on the rotating plate (53). A protruding rod (32) is fixedly installed on both connecting blocks (31), and the two protruding rods (32) correspond one-to-one with the two arc grooves (54), and the protruding rods (32) are slidably installed in the arc grooves (54). The guide component includes a vertical plate (6) fixedly installed on the support plate (5), and a guide groove is provided on the vertical plate (6). One end of the connecting frame (41) is slidably installed in the guide groove. The guide groove includes a vertical part (61) and a horizontal part (62).

2. The continuous conveyor based on plastic handle feeding according to claim 1, characterized in that, A first spring (43) is provided between the connecting frame (41) and the tension rod (22), and the two ends of the first spring (43) are fixedly connected to the connecting frame (41) and the tension rod (22) respectively.

3. A continuous conveyor based on a plastic handle for feeding, as described in claim 1, is characterized in that, A first torsion spring (55) is provided between the rotating plate (53) and the fixed base (52).

4. A continuous conveyor based on a plastic handle for feeding, as described in claim 1, characterized in that, A second spring (56) is provided between the support plate (5) and the sliding seat (51), and the two ends of the second spring (56) are fixedly connected to the support plate (5) and the sliding seat (51) respectively.

5. A continuous conveyor based on a plastic handle for feeding, as described in claim 1, characterized in that, The cutting device (7) is rotatably mounted with a fixed cutting blade (71), which has two cutting edges corresponding to the two ends of the handle connection.

6. A continuous conveyor based on a plastic handle for feeding, as described in claim 1, characterized in that, A pressure rod (72) is rotatably mounted on the cutting device (7), and the pressure rod (72) is rotatably connected to the connecting frame (41); a second torsion spring (73) is provided between the pressure rod (72) and the cutting device (7).

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