Honeycomb paperboard compound machine

Abstract

The utility model relates to the technical field of compound machines, and provides a honeycomb paperboard compound machine which comprises a rack, the first conveying part is arranged on the rack and used for conveying the composite board; the first rotating roller is rotationally arranged on the rack; the multiple cutting pieces are arranged on the first rotating roller in a sliding mode, a cutting gap is formed between each cutting piece and the first conveying piece, and the composite board penetrates through the cutting gaps and the cutting pieces to be used for increasing or reducing the cutting gaps after sliding. By means of the technical scheme, the problem that in the prior art, a honeycomb paperboard compound machine cannot adjust the cutting distance is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of compound machines, and specifically, to a honeycomb paperboard compound machine. Background Art

[0002] A honeycomb paperboard compound machine is a special equipment for producing honeycomb paperboards. Honeycomb paperboards are lightweight, high-strength, and environmentally friendly composite materials, which are widely used in industries such as packaging, construction, and furniture. Its core structure is composed of one or more layers of honeycomb core materials (honeycomb cores) and face papers (or called panels) bonded together by adhesives. The honeycomb board compound machines in the prior art cannot quickly adjust the size of the cutting gap, resulting in low efficiency in replacing cutting tools when producing paperboards of different sizes, and affecting the production efficiency. Content of the Utility Model

[0003] The utility model provides a honeycomb paperboard compound machine, which solves the problem that the honeycomb paperboard compound machine in the related art cannot adjust the cutting distance.

[0004] The technical solution of the utility model is as follows:

[0005] A honeycomb paperboard compound machine includes:

[0006] A frame;

[0007] A first conveyor, arranged on the frame, and used for conveying composite boards;

[0008] A first roller, rotatably arranged on the frame;

[0009] Cutting members, several in number, axially slidingly arranged on the first roller along the axial direction of the first roller. There is a cutting gap between the cutting members and the first conveyor, and the composite board passes through the cutting gap. After the cutting members slide, they are used to increase or decrease the cutting gap.

[0010] As a further technical solution, the cutting members include:

[0011] A first mounting seat, slidingly arranged on the first roller;

[0012] A cutting tool, arranged on the first mounting seat.

[0013] As a further technical solution, the first roller has several clamping holes, and further includes:

[0014] Clamping blocks, arranged on the first mounting seat in a lifting manner. After the clamping blocks are lifted, they are clamped into or slide out of the clamping holes.

[0015] As a further technical solution, the first mounting seat has a mounting space, the mounting space has a first opening, the clamping block is arranged to be lifted and lowered at the first opening, and further includes:

[0016] A rotating rod, rotatably arranged in the mounting space and having a convex block, after the convex block abuts against the clamping block, driving the clamping block to descend;

[0017] A first elastic member, one end of which is arranged on the first mounting seat and the other end is arranged on the clamping block, and the first elastic member is used to provide a force for the clamping block to rise.

[0018] As a further technical solution, the first mounting seat further has a sunk groove, the sunk groove is communicated with the mounting space through a second opening, one end of the rotating rod is rotatably arranged in the sunk groove, and the other end extends out of the mounting space.

[0019] As a further technical solution, the rotating rod is rotatably and slidably arranged in the mounting space, one end of the rotating rod has a clamping section and a rotating section, after the rotating rod slides, the rotating section is located at the second opening or the clamping section is clamped at the second opening.

[0020] As a further technical solution, it further includes:

[0021] A second elastic member, one end of which is arranged in the sunk groove and the other end is arranged on the rotating rod, and the second elastic member is used to provide a force for the rotating rod to reset.

[0022] As a further technical solution, it further includes:

[0023] A control ring, arranged on the other end of the rotating rod and located outside the mounting space.

[0024] As a further technical solution, the machine frame has a glue application gap and an extrusion gap arranged in sequence, and further includes:

[0025] A second conveying member, arranged on the machine frame and leading to the first conveying member, the second conveying member is used to convey a honeycomb board, and the honeycomb board passes through the glue application gap;

[0026] A second rotating roller, rotatably arranged on the machine frame and used for winding an upper paper sheet;

[0027] A third rotating roller, rotatably arranged on the machine frame and used for winding a lower paper sheet, the honeycomb board is located between the upper paper sheet and the lower paper sheet to form the composite board, and the composite board is formed through the extrusion gap.

[0028] As a further technical solution, it further includes:

[0029] Two fourth rollers are arranged on the frame at intervals and rotate.

[0030] There are several second mounting seats, which are arranged on the fourth rollers at intervals.

[0031] There are several conveyor belts, which are looped around the second mounting seats. The first conveying member leads to the conveyor belts. The second mounting seat has the same structure as the first mounting seat, and the fourth roller has the same structure as the first roller.

[0032] The working principle and beneficial effects of the present utility model are as follows:

[0033] In the present utility model, the first conveying member is composed of a series of conveyor belts running synchronously, ensuring the stable movement of the composite board during processing. The conveying member ensures the stability of the composite board during high-speed conveying and reduces damage. On the first roller, several cutting members are slidably arranged, and each cutting member is equipped with a cutter. A cutting gap is formed between the cutting member and the first conveying member. The composite board passes through the cutting gap during conveying, and the cutting gap cuts a whole composite board into several composite boards of specific sizes. The cutting member can slide as needed, thereby increasing or decreasing the cutting gap and changing the size after cutting. The composite machine can adapt to composite boards of different thicknesses or sizes. By adjusting the cutting gap, the problems of uneven cutting or damage to the composite board caused by improper cutting gap are reduced. This solution not only optimizes the conveying and cutting processes of the composite board, improves the processing efficiency and cutting accuracy, but also ensures the stable operation of the equipment and the safety of operation. Description of the Drawings

[0034] The following will further illustrate the above characteristics, technical features, advantages and their implementation manners of the present utility model in a clear and understandable manner in combination with the drawings of the preferred embodiments.

[0035] Figure 1 It is a schematic structural diagram of the present utility model;

[0036] Figure 2 It is Figure 1 an enlarged schematic view of part A of

[0037] Figure 3 It is a schematic cross-sectional view of the first mounting seat of the present utility model;

[0038] Figure 4 It is Figure 3 an enlarged schematic view of part B of

[0039] Figure 5 It is a schematic cross-sectional view of the first roller of the present utility model;

[0040] Figure 6 It is a schematic structural diagram of the rotating rod of the present utility model.

[0041] In the figure: 100, frame; 200, first conveyor; 300, first roller; 400, cutting member; 410, cutting gap; 420, first mounting seat; 430, cutter; 310, clamping hole; 500, clamping block; 421, mounting space; 422, first opening; 600, rotating rod; 610, convex block; 700, first elastic member; 423, sinking groove; 424, second opening; 620, clamping section; 630, rotating section; 800, second elastic member; 900, control ring; 110, gluing gap; 120, extrusion gap; 1000, second conveyor; 1100, second roller; 1200, third roller; 1300, fourth roller; 1400, second mounting seat; 1500, conveyor belt. Detailed implementation manners

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the specific implementation manners of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, they can also be understood as further technical solutions. Among some figures, components with the same structure or function are only schematically shown for one of them, or only one of them is marked. In this article, "one" not only means "only this one", but also means "more than one" situation, and "several" includes "two" and "more than two".

[0043] In this article, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0044] In addition, in the description of this application, the terms "first", "second", etc. are only used for distinguishing descriptions, and cannot be understood as indicating or implying relative importance.

[0045] Referring to Figures 1 to 6 , for the first embodiment of the present invention, there is provided

[0046] A honeycomb paperboard laminating machine, comprising:

[0047] A frame 100;

[0048] A first conveyor 200, arranged on the frame 100, and the first conveyor 200 is used for conveying the composite board;

[0049] The first rotating roller 300 is rotatably arranged on the frame 100;

[0050] There are several cutting members 400, which are slidably arranged on the first rotating roller 300 along the axial direction of the first rotating roller 300. There is a cutting gap 410 between the cutting member 400 and the first conveying member 200. The composite board passes through the cutting gap 410. After the cutting member 400 slides, it is used to increase or decrease the cutting gap 410.

[0051] In this embodiment, the first conveying member 200 is composed of a series of synchronously rotating conveyor belts 1500, ensuring the stable movement of the composite board during processing. The conveying member ensures the stability of the composite board during high-speed conveying and reduces damage. On the first rotating roller 300, several cutting members 400 are slidably arranged. Each cutting member 400 is equipped with a cutter. A cutting gap 410 is formed between the cutting member 400 and the first conveying member 200. The composite board passes through the cutting gap 410 during conveying. The cutting gap 410 cuts a whole composite board into several composite boards of specific sizes. The cutting member 400 can slide as needed, thereby increasing or decreasing the cutting gap 410 and changing the size after cutting. The composite machine can adapt to composite boards of different thicknesses or sizes. By adjusting the cutting gap 410, the problems of uneven cutting or damage to the composite board caused by improper cutting gap 410 are reduced. This embodiment not only optimizes the conveying and cutting processes of the composite board, improves the processing efficiency and cutting accuracy, but also ensures the stable operation of the equipment and the safety of operation.

[0052] Furthermore, the cutting member 400 includes:

[0053] The first mounting seat 420 is slidably arranged on the first rotating roller 300;

[0054] The cutting tool 430 is arranged on the first mounting seat 420.

[0055] In this embodiment, the first mounting seat 420 is slidably arranged on the first rotating roller 300, and the cutting tool 430 is firmly mounted on the first mounting seat 420. Through the sliding fit between the first mounting seat 420 and the first rotating roller 300, the cutting member 400 can adjust its position as needed, and further increase or decrease the cutting gap 410. The first mounting seat 420 and the cutting tool 430 consider the ease of maintenance and operation safety. For example, through a quick disassembly and assembly structure, it is convenient to regularly check or replace the cutting tool 430 to maintain the cutting effect. At the same time, a safety protection device is designed in the system, such as a protective cover or an emergency stop button, ensuring the safety of the operator during the cutting process.

[0056] Furthermore, the first rotating roller 300 has several clamping holes 310, and further includes:

[0057] The clamping block 500 is vertically arranged on the first mounting seat 420. After the clamping block 500 moves up and down, it can be inserted into or slide out of the clamping hole 310.

[0058] In this embodiment, a plurality of evenly distributed clamping holes 310 are provided on the first roller 300. On the first mounting seat 420, a clamping block 500 is vertically arranged. The clamping block 500 can move up and down in the vertical direction to be inserted into or slide out of the clamping holes 310 on the first roller 300. The cutting member 400 can be quickly positioned and adjusted on the first roller 300, improving the flexibility and processing efficiency of the equipment. The operator or the automatic control system can easily change the cutting gap 410 between the cutting member 400 and the first conveying member 200 by adjusting the clamping position of the clamping block 500, adapting to the processing requirements of composite boards of different sizes, and improving the adaptability and processing accuracy of the equipment. This embodiment improves the processing efficiency and cutting accuracy.

[0059] Furthermore, the first mounting seat 420 has a mounting space 421, and the mounting space 421 has a first opening 422. The clamping block 500 is vertically arranged at the first opening 422. It further includes:

[0060] A rotating rod 600 is rotatably arranged in the mounting space 421 and has a convex block 610. After the convex block 610 abuts against the clamping block 500, it drives the clamping block 500 to descend;

[0061] A first elastic member 700 has one end arranged on the first mounting seat 420 and the other end arranged on the clamping block 500. The first elastic member 700 is used to provide a force for the clamping block 500 to rise.

[0062] In this embodiment, an installation space 421 is designed inside the first mounting seat 420, and the clamping block 500 is arranged to be lifted and lowered at the first opening 422. The clamping block 500 can be lifted and lowered in the vertical direction inside the first mounting seat 420, which is convenient for quickly aligning with and disengaging from the clamping holes 310 on the first roller 300, improving the flexibility of the equipment. Inside the installation space 421, a rotating rod 600 is rotatably arranged, and a convex block 610 is provided on the rotating rod 600. When the rotating rod 600 rotates, the convex block 610 can contact the clamping block 500 and drive the clamping block 500 to descend, realizing the clamping with the clamping holes 310 on the first roller 300. Through the rotating rod 600 in this embodiment, the cutting member 400 can be quickly and accurately positioned and adjusted on the first roller 300. Between the first mounting seat 420 and the clamping block 500 in this embodiment, a first elastic member 700, such as a spring, is provided. One end of the elastic member 700 is fixed on the first mounting seat 420, and the other end is fixed on the clamping block 500. Its function is to provide a force for the clamping block 500 to rise when there is no external force, so that when there is no action of the convex block 610, the clamping block 500 can automatically disengage from the clamping holes 310 on the first roller 300, thereby adjusting the size of the cutting gap 410. This embodiment simplifies the positioning process of the clamping block 500, improves the automation level and operation simplicity of the equipment, and simplifies the positioning and adjustment process of the clamping block 500 on the first roller 300.

[0063] Furthermore, the first mounting seat 420 further has a sunk groove 423, and the sunk groove 423 communicates with the installation space 421 through a second opening 424. One end of the rotating rod 600 is rotatably arranged in the sunk groove 423, and the other end extends out of the installation space 421.

[0064] In this embodiment, a sunk groove 423 is provided on the first mounting seat 420, and the sunk groove 423 communicates with the installation space 421 through a second opening 424. The purpose is to prevent the rotating rod 600 from being misaligned. When it is necessary to rotate the rotating rod 600, the other end of the rotating rod 600 located outside the installation space 421 is controlled to realize the locking and loosening of the first mounting seat 420.

[0065] Furthermore, the rotating rod 600 is rotatably and slidably arranged in the installation space 421. One end of the rotating rod 600 has a clamping section 620 and a rotating section 630. After the rotating rod 600 slides, the rotating section 630 is located at the second opening 424 or the clamping section 620 is clamped at the second opening 424.

[0066] In this embodiment, the rotating rod 600 can not only rotate within the installation space 421, but also has a sliding function. One end of the rotating rod 600 is divided into two parts: a clamping section 620 and a rotating section 630. The designs of these two parts meet different operation requirements. The clamping section 620 is designed with a special clamping structure. For example, the second opening 424 is a straight groove, and the clamping section 620 is a structure that fits with the second opening 424. When the clamping section 620 is at the second opening 424, the clamping section 620 cannot rotate. When the rotating rod 600 slides to the innermost part of the sunk groove 423, the clamping section 620 can be clamped at the second opening 424, and the cooperation between the convex block 610 and the clamping block 500 realizes the fixation of the clamping block 500. The rotating section 630 is designed as a smooth cylinder, which is convenient for rotation at the second opening 424 and does not affect the normal operation of the rotating rod 600. When it is necessary to disassemble the first mounting seat 420, pull the rotating rod 600 outwards so that the rotating section 630 is located at the second opening 424. After the rotating rod 600 rotates, the convex block 610 is completely separated from the clamping block 500, and the clamping block 500 rises and disengages from the clamping hole 310, realizing the disassembly of the first mounting seat 420. The rotating rod 600 can flexibly switch between the lifting control and position adjustment of the clamping block 500, improving the flexibility and processing efficiency of the device.

[0067] Furthermore, it further includes:

[0068] A second elastic member 800, with one end disposed in the sunk groove 423 and the other end disposed on the rotating rod 600. The second elastic member 800 is used to provide a force for the rotating rod 600 to reset.

[0069] It further includes:

[0070] A control ring 900, disposed on the other end of the rotating rod 600 and located outside the installation space 421.

[0071] In this embodiment, in order to ensure that the rotating rod 600 can automatically reset after the operation is completed, a second elastic member 800, such as a spring, is introduced into the device. One end of the second elastic member 800 is fixed in the sunk groove 423, and the other end is fixed on the rotating rod 600. When the rotating rod 600 is pushed by an operator or an automated control system to deviate from the initial position, the second elastic member 800 begins to accumulate elastic potential energy. Once the external force disappears, the second elastic member 800 immediately releases the accumulated energy and pulls the rotating rod 600 quickly back to the initial position. This design simplifies the operation process of the device and improves the automation level and operation efficiency of the device. To facilitate the operator to control the rotating rod 600, especially when operating outside the installation space 421, a control ring 900 is added to the device. The control ring 900 is firmly arranged at the other end of the rotating rod 600 and is located outside the installation space 421, ensuring that the operator can operate without directly contacting the rotating rod 600. The design of the control ring 900 takes into account the ergonomic principle and uses a non-slip material, providing a comfortable grip, enabling the operator to easily rotate or slide the rotating rod 600 to achieve precise control of the clamping block 500. When the first mounting seat 420 needs to be disassembled, the operator pulls the rotating rod 600 outward through the control ring 900. The rotating section 630 of the rotating rod 600 is located at the second opening 424. Rotating the rotating rod 600 makes the convex block 610 unable to abut against the clamping block 500. The clamping block 500 is disengaged from the clamping hole 310 under the action of the first elastic member 700, and the first mounting seat 420 is disassembled.

[0072] Further, the frame 100 has a glue application gap 110 and an extrusion gap 120 arranged in sequence, and further includes:

[0073] A second conveyor 1000, arranged on the frame 100 and leading to the first conveyor 200. The second conveyor 1000 is used to convey the honeycomb board, and the honeycomb board passes through the glue application gap 110;

[0074] A second roller 1100, rotatably arranged on the frame 100 and used for winding the upper paper sheet;

[0075] A third roller 1200, rotatably arranged on the frame 100 and used for winding the lower paper sheet. The honeycomb board is located between the upper paper sheet and the lower paper sheet to form a composite board, and the composite board is formed through the extrusion gap 120.

[0076] In this embodiment, a glue - applying gap 110 and a pressing gap 120 are arranged in sequence on the frame 100, ensuring precise control and continuity during the glue - applying and composite - forming processes of the honeycomb board. The glue - applying gap 110 is used to evenly apply glue to the honeycomb board, while the pressing gap 120 is used to press the upper paper sheet and the lower paper sheet on both sides of the glue - applied honeycomb board to form a composite board, ensuring the strength of the composite board. Through the cooperation of the glue - applying gap 110 and the pressing gap 120, the composite board can be continuously produced, improving production efficiency and the finished - product rate. The composite board is appropriately pressed in the pressing gap 120, ensuring the uniform penetration of the glue and the tight fitting of the paper sheets, and improving the structural strength and surface quality of the composite board.

[0077] Furthermore, it further includes:

[0078] Two fourth rollers 1300, which are rotatably arranged on the frame 100 at intervals;

[0079] Second mounting seats 1400, there are several of them, which are arranged on the fourth rollers 1300 at intervals;

[0080] Conveyor belts 1500, there are several of them, which are looped around the second mounting seats 1400. The first conveyor 200 leads to the conveyor belts 1500. The second mounting seats 1400 have the same structure as the first mounting seats 420, and the fourth rollers 1300 have the same structure as the first rollers 300.

[0081] In this embodiment, on the frame 100, two fourth rollers 1300 are rotatably arranged at intervals. The fourth rollers 1300 have the same structural design as the first rollers 300. On the fourth rollers 1300, several second mounting seats 1400 are arranged at intervals. The second mounting seats 1400 have the same structural design as the first mounting seats 420, enabling quick disassembly and assembly of the second mounting seats 1400. By adjusting the size of the cutting gap 410 and then adjusting the distance between the conveyor belts 1500, the conveyor belts 1500 and the cutting member 400 are coordinated so that one conveyor belt 1500 conveys one cut composite board. The composite board can be continuously produced and adjusted. The entire conveying and adjusting process is coordinated by an integrated automated control system. High - precision sensors monitor the rotational speed of the fourth rollers 1300, the speed of the conveyor belts 1500, and the state of the composite board, ensuring precise control and efficient execution of the production process. The control system may also automatically adjust the speed of the conveyor belts 1500 and the position of the cutting member 400 according to the characteristics of the composite board to optimize the processing effect of the composite board. This embodiment not only optimizes the conveying and adjusting process of the composite board, improves production efficiency and processing accuracy, but also ensures the stable operation of the equipment and the safety of operation.

[0082] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A honeycomb paperboard compounding machine, characterized in that: include: Rack(100); A first conveying member (200) is arranged on the frame (100), and the first conveying member (200) is used to convey the composite board; A first rotating roller (300) rotatably disposed on the frame (100); A plurality of cutting members (400) are slidably arranged on the first rotating roller (300), wherein the plurality of cutting members (400) slide axially along the first rotating roller (300), wherein a cutting gap (410) is provided between the cutting member (400) and the first conveying member (200), wherein the composite plate passes through the cutting gap (410), and wherein the cutting member (400) is used to increase or decrease the cutting gap (410) after sliding.

2. A honeycomb paperboard laminating machine according to claim 1, characterized in that: The cutting element (400) comprises: A first mounting seat (420) slidably disposed on the first rotating roller (300); The cutter (430) is arranged on the first mounting seat (420).

3. A honeycomb paperboard laminating machine according to claim 2, characterized in that: The first rotating roller (300) has a plurality of clamping holes (310) and further comprises: The clamping block (500) is lifted and arranged on the first mounting seat (420); after the clamping block (500) is lifted and lowered, it is clamped into or slides out of the clamping hole (310).

4. A honeycomb paperboard laminating machine according to claim 3, characterized in that: The first mounting seat (420) has a mounting space (421), the mounting space (421) has a first opening (422), the clamping block (500) is arranged to be lifted at the first opening (422), and further comprises: A rotating rod (600) is rotatably disposed in the installation space (421) and has a protrusion (610); after the protrusion (610) abuts against the clamping block (500), it drives the clamping block (500) to descend; A first elastic member (700) has one end arranged on the first mounting seat (420) and the other end arranged on the clamping block (500), and the first elastic member (700) is used to provide a force for the clamping block (500) to rise.

5. The honeycomb paperboard compounding machine according to claim 4, characterized in that: The first mounting seat (420) further comprises a sink groove (423), the sink groove (423) being in communication with the mounting space (421) via a second opening (424), one end of the rotating rod (600) being rotatably disposed in the sink groove (423), and the other end extending out of the mounting space (421).

6. The honeycomb paperboard laminating machine according to claim 5, characterized in that: The rotating rod (600) is rotatably and slidably arranged in the installation space (421); one end of the rotating rod (600) comprises a clamping section (620) and a rotating section (630); after the rotating rod (600) slides, the rotating section (630) is located at the second opening (424) or the clamping section (620) is clamped at the second opening (424).

7. The honeycomb paperboard laminating machine according to claim 5, characterized in that: Also includes: A second elastic member (800) has one end disposed in the sink (423) and the other end disposed on the rotating rod (600), and the second elastic member (800) is used to provide a force for restoring the rotating rod (600).

8. The honeycomb paperboard laminating machine according to claim 5, characterized in that: Also includes: A control ring (900) is arranged on the other end of the rotating rod (600) and is located outside the installation space (421).

9. The honeycomb paperboard compounding machine according to claim 1, characterized in that: The frame (100) has a glue coating gap (110) and an extrusion gap (120) arranged in sequence, and further comprises: A second conveying member (1000) is arranged on the frame (100) and leads to the first conveying member (200), the second conveying member (1000) being used to convey the honeycomb panel, the honeycomb panel passing through the glue coating gap (110); A second rotating roller (1100) is rotatably disposed on the frame (100) and is used to roll up the paper sheet; The third roller (1200) is rotatably disposed on the frame (100) and is used to roll up the lower paper sheet, the honeycomb panel is located between the upper paper sheet and the lower paper sheet, and the composite panel is formed through the extrusion gap (120).

10. The honeycomb paperboard laminating machine according to claim 2, characterized in that: Also includes: Two fourth rotating rollers (1300) are arranged on the frame (100) to rotate at intervals; A plurality of second mounting seats (1400) are arranged at intervals on the fourth rotating roller (1300); The conveyor belt (1500) has a plurality of conveyor belts which are cyclically arranged on the second mounting seat (1400); the first conveying member (200) leads to the conveyor belt (1500); the second mounting seat (1400) has the same structure as the first mounting seat (420); and the fourth roller (1300) has the same structure as the first roller (300).

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