Double-roller type gluing machine for plywood production

Abstract

The utility model relates to the field of plywood processing, in particular to a double-roller type gluing machine for plywood production, which comprises a rack, the lower end of an inner cavity of the rack is connected with a glue groove, and a lower gluing roller component is rotatably connected in the glue groove; a U-shaped mounting plate is arranged above the lower gluing roller assembly, a lifting driving assembly for driving the U-shaped mounting plate to ascend and descend is mounted on the rack, an inner cavity of the U-shaped mounting plate is rotationally connected with an upper gluing roller assembly, a feeding groove is formed between the U-shaped mounting plate and the upper gluing roller assembly and connected with the U-shaped mounting plate, and a glue outlet is formed in the bottom face of the feeding groove. Two striker plates are slidably connected in the feeding groove at intervals, and the lower ends of the striker plates are connected with linear adjusting assemblies; the plate conveying assemblies are arranged on the front side and the rear side of the rack correspondingly, and the plate conveying assemblies are connected with plate guiding mechanisms. The device is reasonable in structure, can effectively reduce the situation that sizing materials drop outside a plate blank, reduces unnecessary sizing material loss, and reduces the production cost.

Description

TECHNICAL FIELD

[0001] The utility model relates to plywood processing field especially plywood production's double roll type glue spreading machine. BACKGROUND

[0002] Plywood is a multi-layer construction board widely used in furniture manufacturing, building decoration, and packaging materials. It is mainly composed of multiple layers of wood boards bonded by specific adhesives. Typically, the structural design of plywood includes two or more decorative face layers, which protect the internal core and enhance overall durability. These decorative face layers are tightly connected to the internal core through adhesives and are pressed under the precise control of automatic machinery and high temperature and pressure environment, forming a multi-layer construction board. In the production process, the gluing process is crucial. After cutting, the board is evenly coated with a thin and continuous layer of glue on the surface by the glue spreading machine. After gluing, workers need to stack the glued boards according to the natural direction of the wood grain to form an orderly board blank. Then, the board blank enters the pre-press for preliminary compression.

[0003] For the above-mentioned related technology, the inventor found that in the actual production process, the size of the board will change according to the customer's order requirements, when the width of the plywood is not the same, the glue layer width on the roller cannot be changed according to the needs, resulting in glue falling on the outside of the board blank, causing waste of glue, increasing production cost. UTILITY MODEL CONTENT

[0004] The utility model mainly solves the technical problem to provide a kind of plywood production's double roll type glue spreading machine, the spacing between the two material stopping plates in feed tank is adjusted by linear adjustment component, the size of glue outlet on the bottom surface of feed tank is changed, glue can effectively reduce drop on the outside of board blank, reduce unnecessary glue loss, reduce production cost.

[0005] To solve the above technical problems, the utility model adopts one technical scheme: provide a kind of plywood production's double roll type glue spreading machine, including: rack, the lower end of the inner chamber of the rack is connected with glue tank, the glue tank is rotatably connected with lower glue spreading roller assembly, the lowest point of the lower glue spreading roller assembly is immersed in the glue in glue tank;

[0006] The upper side of the lower glue coating roller assembly is provided with a U-shaped mounting plate, a lifting driving assembly for driving the lifting of the U-shaped mounting plate is mounted on the frame, the inner cavity of the U-shaped mounting plate is rotationally connected with an upper glue coating roller assembly, a glue supply groove is arranged between the U-shaped mounting plate and the upper glue coating roller assembly, the glue supply groove is connected with the U-shaped mounting plate, a glue outlet is arranged on the bottom surface of the glue supply groove, and two material blocking plates are slidably connected in the glue supply groove.

[0007] The plate conveying assembly is further provided with a plate guiding mechanism.

[0008] By adopting the above technical scheme, before processing, the distance between the plate guiding mechanisms is adjusted to provide guidance for the plate to be conveyed and reduce deviation and other problems. Meanwhile, the lifting driving assembly drives the U-shaped mounting plate to move downward. In this process, the upper glue coating roller assembly connected to the inner side of the U-shaped mounting plate moves downward synchronously with the glue supply groove, so that the gap between the upper glue coating roller assembly and the lower glue coating roller assembly can meet the requirements of plates with different thicknesses. After the upper glue coating roller assembly is in place, the distance between the two material blocking plates in the glue supply groove is adjusted by the linear adjustment assembly to change the size of the glue outlet on the bottom surface of the glue supply groove, which can effectively reduce the glue dropping on the outside of the plate blank, reduce unnecessary glue loss and reduce production cost. After the above steps are completed, the plate conveying assembly drives the plate to move towards the frame, and at the same time, the worker adds glue into the glue supply groove through the pipeline above the glue supply groove, so that the glue drops on the second glue coating roller along the glue outlet. At this time, the glue on the surface of the rotating upper glue coating roller assembly is evenly coated on the upper surface of the plate. The corresponding lower glue coating roller assembly also absorbs the glue in the glue groove and evenly coats the lower surface of the plate during rotation. In the working process of the above device, the size of the glue outlet on the bottom surface of the glue supply groove can be adjusted, and the excess glue on the lower glue coating roller assembly falls back into the glue groove, which reduces unnecessary loss and reduces production cost.

[0009] In a preferred example, the lower glue coating roller assembly can be further configured to include a glue coating roller one, one end of the glue coating roller one is connected with a glue groove, and the other end penetrates through the glue groove and is connected with a servo motor one.

[0010] By adopting the above technical scheme, the servo motor one drives the glue coating roller one to rotate, so that the glue coating roller one absorbs the glue in the glue groove and coats the glue on the lower surface of the plate.

[0011] The utility model discloses a further configuration in a preferable example can be: the lifting drive assembly includes the oil cylinder one of installation on the frame and the guide bar piece one of setting respectively at the both sides of oil cylinder one, the extension end of oil cylinder one is connected with the U-shaped mounting plate,

[0012] The guide bar piece one includes the guide bar one and the guide sleeve one of embedding in the frame, one end of the guide bar one is connected with the U-shaped mounting plate, and the other end passes through the guide sleeve one and is slidably connected with it.

[0013] Through adopting the above technical scheme, in the process of the board advancing, the oil cylinder one drives the U-shaped mounting plate to move down, drives the upper glue roller assembly connected in the U-shaped mounting plate to move down, so that the upper glue roller assembly can contact with the board, and the guide bar one and the guide sleeve one set at the both sides of the oil cylinder one can provide the guiding action for the movement of the upper glue roller assembly.

[0014] The utility model discloses a further configuration in a preferable example can be: the linear adjustment component includes the E-shaped plate of connecting respectively at the lower end of two material baffle plates, both ends of the E-shaped plate are connected with the guide rail respectively, and two linear adjustment pieces are connected with interval between the both of the E-shaped plate, and two linear adjustment pieces are located at the front and back of the feeding groove respectively,

[0015] The linear adjustment piece includes the screw rod one, the screw rod two and the central pipe, one end of the screw rod one is connected with the E-shaped plate of left side, and the other end is connected with the central pipe forward thread connection, one end of the screw rod two is connected with the E-shaped plate of right side, and the other end is connected with the central pipe reverse thread connection.

[0016] Through adopting the above technical scheme, the hexagon nut is sleeved on the outer surface of the central pipe and is fixedly connected with it, is convenient for the worker to use the tool to rotate the central pipe, when the central pipe is forward rotated, the screw rod one and the screw rod two connected at both ends of the central pipe drive the E-shaped plate of left and right sides to move towards each other, when the central pipe is reverse rotated, the screw rod one and the screw rod two connected at both ends of the central pipe drive the E-shaped plate of left and right sides to move away from each other, and two E-shaped plates drive two material baffle plates connected with them to move respectively, and the material baffle plate moves in the moving process, and the glue outlet size on the bottom surface of the feeding groove is adjusted.

[0017] The utility model discloses a further configuration in a preferable example can be: the upper glue roller assembly includes the glue roller cylinder two, one end of the glue roller cylinder two is rotationally connected with the U-shaped mounting plate, and the other end is connected with the servo motor two through the U-shaped mounting plate.

[0018] Through adopting the above technical scheme, the glue in the feeding groove drops evenly to the glue roller cylinder two through the glue outlet, and the glue roller cylinder two evenly coats the glue on the board surface.

[0019] The utility model discloses a further configuration in a preferable example can be: the board transport component includes rectangular mounting bracket, and one end of rectangular mounting bracket is rotatably connected with driving roller, and the other end is rotatably connected with driven roller, and a plurality of support rollers are arranged between driving roller and driven roller, and the both ends of support roller are rotatably connected with rectangular mounting bracket respectively, one end of driving roller passes through rectangular mounting bracket and is connected with servo motor three, and the top inner wall of conveyer belt is rotatively connected with support roller between driving roller and driven roller.

[0020] By adopting the above technical scheme, the board to be coated is placed on the conveyer belt, the servo motor three drives the driving roller to rotate, and through the cooperation of the driving roller, the driven roller and the support roller, the board is driven to advance, and after the coating of the board is completed, the board is conveyed to the next process by the conveyer belt.

[0021] The utility model discloses a further configuration in a preferable example can be: the board transport component includes rectangular mounting bracket, and one end of rectangular mounting bracket is rotatably connected with driving roller, and the other end is rotatably connected with driven roller, and a plurality of support rollers are arranged between driving roller and driven roller, and the both ends of support roller are rotatably connected with rectangular mounting bracket respectively, one end of driving roller passes through rectangular mounting bracket and is connected with servo motor three, and the top inner wall of conveyer belt is rotatively connected with support roller between driving roller and driven roller.

[0022] Through adopting the above technical scheme, in the initial stage of processing, two oil cylinders two respectively drive the guide plates connected with them to move, so that the spacing between the two guide plates meets the width of the board with glue, and through the joint action of the two guide plates, the slightly inclined board is righted and centered, facilitating subsequent processing.

[0023] In summary, the utility model discloses at least one of the following beneficial technical effects:

[0024] By adjusting the spacing between the two baffle plates in the feed groove through the central pipe in the rotary linear adjustment assembly, the size of the glue outlet on the bottom surface of the feed groove is changed, which can effectively reduce the excessive glue dropping on the coating roller two, reduce unnecessary glue loss and reduce production cost. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the drawings needed in the embodiment description will be briefly introduced as follows, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained without creative labor, wherein:

[0026] Figure 1is a structure schematic view of a preferable embodiment of a double-roller type gluing machine for plywood production of the utility model;

[0027] Figure 2 is Figure 1 the sectional view at A-A in figure

[0028] Figure 3 is Figure 1 structure schematic view of the lower gluing roller assembly in figure

[0029] Figure 4 is Figure 1 structure schematic view of the upper gluing roller assembly in figure

[0030] Figure 5 is Figure 1 structure schematic view of the linear adjustment assembly and the material blocking plate in figure

[0031] Figure 6 is Figure 1 structure schematic view of the plate material transportation assembly in figure

[0032] Figure 7 is Figure 1 structure schematic view of the plate material guiding assembly in figure

[0033] Figure 8 is Figure 1 structure schematic view of the feeding groove, the glue outlet and the material blocking plate in figure

[0034] In the figure: 11, rack; 12, glue groove; 13, U-shaped mounting plate; 14, feeding groove; 15, glue outlet;

[0035] 16, material blocking plate;

[0036] 20, lower gluing roller assembly; 21, gluing roller one; 22, servo motor one;

[0037] 30, lifting drive assembly; 31, oil cylinder one; 32, guide rod piece one; 321, guide rod one; 322, guide sleeve one

[0038] 40, upper gluing roller assembly; 41, gluing roller two; 42, servo motor two

[0039] 50, linear adjustment assembly; 51, E-shaped plate; 52, guide rail; 53, linear adjustment piece; 531, screw rod one; 532, screw rod two; 533, center tube;

[0040] 60, plate material transportation assembly; 61, rectangular mounting frame; 62, driving roller; 63, driven roller; 64, supporting roller; 65, servo motor three; 66, conveying belt;

[0041] 70, plate guide assembly; 71, guide plate; 72, mounting plate; 73, oil cylinder two; 74, guide rod two; 741, guide rod two; 742, guide sleeve two. DETAILED DESCRIPTION

[0042] The preferred embodiments of the present application will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are merely intended to illustrate and explain the present application, and are not intended to limit the present application.

[0043] It should be noted that these drawings are simplified schematic diagrams, and only schematically show the basic structure of the present application, and thus only show the relevant components of the present application.

[0044] REFERENCE Figures 1-8 The utility model discloses a double roll type glue spreading machine for plywood production, which comprises a rack 11, a glue tank 12 connected to the lower end of the inner cavity of the rack 11, a lower glue spreading roller assembly 20 rotatably connected in the glue tank 12, and the lowest point of the lower glue spreading roller assembly 20 is immersed in the glue in the glue tank 12. The lower glue spreading roller assembly 20 comprises a glue spreading roller one 21, one end of which is connected to the glue tank 12, and the other end penetrates through the glue tank 12 and is connected to a servo motor one 22. The servo motor one 22 drives the glue spreading roller one 21 to rotate, so that the glue spreading roller one 21 adsorbs the glue in the glue tank 12 and spreads the glue on the lower surface of the plate.

[0045] A U-shaped mounting plate 13 is arranged above the lower glue spreading roller assembly 20, a lifting driving assembly 30 for driving the U-shaped mounting plate 13 to lift and lower is mounted on the rack 11, the lifting driving assembly 30 comprises an oil cylinder one 31 mounted on the rack 11 and guide rods one 32 arranged on both sides of the oil cylinder one 31, and the extending end of the oil cylinder one 31 is connected to the U-shaped mounting plate 13; the guide rods one 32 comprise guide rods one 321 and guide sleeves one 322 embedded in the rack 11, one end of the guide rods one 321 is connected to the U-shaped mounting plate 13, and the other end penetrates through the guide sleeves one 322 and is slidably connected thereto. During the forward movement of the plate, the oil cylinder one 31 drives the U-shaped mounting plate 13 to move downward, drives the upper glue spreading roller assembly 40 connected to the U-shaped mounting plate 13 to move downward, so that the upper glue spreading roller assembly 40 can contact the plate, and the guide rods one 321 and the guide sleeves one 322 arranged on both sides of the oil cylinder one 31 can provide a guiding action for the movement of the upper glue spreading roller assembly 40.

[0046] The inner cavity of the U-shaped mounting plate 13 is rotationally connected with an upper glue coating roller assembly 40, and a feeding groove 14 is arranged between the U-shaped mounting plate 13 and the upper glue coating roller assembly 40. The upper glue coating roller assembly 40 comprises a glue coating roller two 41, one end of the glue coating roller two 41 is rotationally connected with the U-shaped mounting plate 13, and the other end is connected with a servo motor two 42 through the U-shaped mounting plate 13. The glue in the feeding groove 14 uniformly drops to the glue coating roller two 41 through a glue outlet 15, and the glue coating roller two 41 uniformly coats glue on the surface of the plate.

[0047] The feeding groove 14 is connected with the U-shaped mounting plate 13, the bottom surface of the feeding groove 14 is provided with the glue outlet 15, and two blocking plates 16 are slidingly connected in the feeding groove 14. The lower ends of the two blocking plates 16 are connected with a linear adjustment assembly 50, which is suitable for adjusting the distance between the two blocking plates 16. The linear adjustment assembly 50 comprises E-shaped plates 51 connected to the lower ends of the two blocking plates 16 respectively, guide rails 52 connected to the two ends of the E-shaped plates 51 respectively, and two linear adjustment members 53 connected between the two E-shaped plates 51.

[0048] The linear adjustment member 53 comprises a screw one 531, a screw two 532 and a center pipe 533. One end of the screw one 531 is connected with the left E-shaped plate 51, and the other end is connected with the center pipe 533 in a forward threaded connection. One end of the screw two 532 is connected with the right E-shaped plate 51, and the other end is connected with the center pipe 533 in a reverse threaded connection. A hexagonal nut is sleeved on the outer surface of the center pipe 533 and is fixedly connected with the center pipe 533, so as to facilitate workers to rotate the center pipe 533 by using a tool. When the center pipe 533 is rotated in a forward direction, the screw one 531 and the screw two 532 connected to both ends of the center pipe 533 drive the left and right E-shaped plates 51 to move towards each other. When the center pipe 533 is rotated in a reverse direction, the screw one 531 and the screw two 532 connected to both ends of the center pipe 533 drive the left and right E-shaped plates 51 to move away from each other. The two E-shaped plates 51 drive the two blocking plates 16 connected thereto to move, and the size of the glue outlet 15 on the bottom surface of the feeding groove 14 is adjusted during the movement of the blocking plates 16.

[0049] Further comprising a plate conveying assembly 60 arranged on the front and rear sides of the rack 11 respectively, and a plate guiding mechanism connected to the plate conveying assembly 60. The plate conveying assembly 60 comprises a rectangular mounting frame 61, one end of which is rotatably connected with a driving roller 62, and the other end is rotatably connected with a driven roller 63, and a plurality of supporting rollers 64 are arranged between the driving roller 62 and the driven roller 63, both ends of the supporting rollers 64 are rotatably connected with the rectangular mounting frame 61; one end of the driving roller 62 penetrates through the rectangular mounting frame 61 and is connected with a servo motor three 65; a conveying belt 66 is connected between the driving roller 62 and the driven roller 63, and the top inner wall of the conveying belt 66 is rotatably connected with the supporting rollers 64. The plate to be coated is placed on the conveying belt 66, the servo motor three 65 drives the driving roller 62 to rotate, and through the coordinated action of the driving roller 62, the driven roller 63 and the supporting rollers 64, the plate is driven to advance, and after the coating of the plate is completed, it is conveyed to the next process by the conveying belt 66.

[0050] The plate guiding mechanism comprises a plate guiding assembly 70 arranged on both sides of the conveying belt 66 respectively, and the plate guiding assembly 70 comprises a guiding plate 71 and a mounting plate 72, the mounting plate 72 is connected with an oil cylinder two 73 for driving the guiding plate 71 to move, and guide rods two 74 are arranged on both sides of the oil cylinder two 73 respectively; the guide rods two 74 comprise guide rods two 741 and guide sleeves two 742 embedded in the mounting plate 72, one end of the guide rods two 741 is connected with the guiding plate 71, and the other end penetrates through the guide sleeves two 742 and is slidably connected therewith. In the initial stage of processing, the two oil cylinders two 73 drive the guiding plates 71 connected therewith to move, so that the distance between the two guiding plates 71 meets the width of the plate with glue, and through the joint action of the two guiding plates 71, the slightly inclined plate is righted and centered, which is convenient for subsequent processing.

[0051] The implementation principle of the embodiment is that, in use, before processing starts, the distance between the two guide plates 71 in the plate guide mechanism is adjusted to meet the processing requirements of plates of different widths, and to provide guidance for the plate to be transported, reducing the problems of deviation and the like. At the same time, the oil cylinder one 31 in the lifting driving assembly 30 drives the U-shaped mounting plate 13 to move downward. In this process, the upper glue roller assembly 40 connected inside the U-shaped mounting plate 13 moves downward synchronously with the feeding groove 14. The gap between the glue roller two 41 in the upper glue roller assembly 40 and the glue roller one 21 in the lower glue roller assembly 20 can meet the requirements of plates of different thicknesses, enhancing the versatility of the equipment. When the glue roller two 41 in the upper glue roller assembly 40 is in place, the center tube 533 in the rotary linear adjustment assembly 50 adjusts the spacing between the two material blocking plates 16 in the feeding groove 14, changes the size of the glue outlet 15 on the bottom surface of the feeding groove 14, and can effectively reduce the glue dropping on the outside of the plate blank, reduce unnecessary glue loss, and reduce the production cost. After the above steps are completed, the conveyor belt 66 in the plate conveying assembly 60 drives the plate to move towards the rack 11, and the worker adds glue into the feeding groove 14 through the pipeline above the feeding groove 14, so that the glue drops on the glue roller two 41 along the glue outlet 15. At this time, the rotating glue roller two 41 evenly coats the glue on the upper surface of the plate. Correspondingly, the glue roller one 21 in the lower glue roller assembly 20 also absorbs the glue in the glue groove 12 and evenly coats the glue on the lower surface of the plate during rotation.

[0052] The above is only an embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structure or equivalent process transformation according to the content of the utility model specification, or direct or indirect application in other related technical fields, is also included in the patent protection range of the utility model.

Claims

1. A two-roller glue applicator for plywood production, comprising: The frame (11) is characterized in that a glue tank (12) is connected to the lower end of the inner cavity of the frame (11), and a lower glue-applying roller assembly (20) is rotatably connected inside the glue tank (12), and the lowest point of the lower glue-applying roller assembly (20) is immersed in the glue material in the glue tank (12). A U-shaped mounting plate (13) is provided above the lower glue-coating roller assembly (20). A lifting drive assembly (30) for driving the U-shaped mounting plate (13) to rise and fall is installed on the frame (11). An upper glue-coating roller assembly (40) is rotatably connected to the inner cavity of the U-shaped mounting plate (13). A feeding groove (14) is provided between the U-shaped mounting plate (13) and the upper glue-coating roller assembly (40). The feeding groove (14) is connected to the U-shaped mounting plate (13). A glue outlet (15) is provided on the bottom surface of the feeding groove (14). Two baffles (16) are slidably connected at intervals in the feeding groove (14). A linear adjustment assembly (50) is connected between the lower ends of the baffles (16) to adjust the distance between the baffles (16). It also includes a plate transport assembly (60) respectively set on the front and rear sides of the frame (11), and the plate transport assembly (60) is connected to a plate guiding mechanism.

2. The double-roller glue applicator for plywood production according to claim 1, characterized in that, The lower coating roller assembly (20) includes a coating roller (21), one end of which is connected to the glue tank (12), and the other end passes through the glue tank (12) and is connected to a servo motor (22).

3. The double-roller glue applicator for plywood production according to claim 1, characterized in that, The lifting drive assembly (30) includes a hydraulic cylinder (31) mounted on the frame (11) and guide rods (32) respectively arranged on both sides of the hydraulic cylinder (31). The extended end of the hydraulic cylinder (31) is connected to the U-shaped mounting plate (13). The guide rod (32) includes a guide rod (321) and a guide sleeve (322) embedded in the frame (11). One end of the guide rod (321) is connected to the U-shaped mounting plate (13), and the other end passes through the guide sleeve (322) and is slidably connected to it.

4. A double-roller glue applicator for plywood production according to claim 1, characterized in that, The upper coating roller assembly (40) includes a second coating roller (41), one end of which is rotatably connected to a U-shaped mounting plate (13), and the other end is connected to a second servo motor (42) through the U-shaped mounting plate (13).

5. A double-roller glue applicator for plywood production according to claim 1, characterized in that, The linear adjustment assembly (50) includes an E-shaped plate (51) connected to the lower ends of two baffle plates (16), and guide rails (52) are connected to both ends of the E-shaped plate (51). Two linear adjustment components (53) are connected between the two E-shaped plates (51) at intervals, and the two linear adjustment components (53) are located on the front and rear sides of the feeding trough (14). The linear adjustment component (53) includes a first screw (531), a second screw (532), and a central tube (533). One end of the first screw (531) is connected to the left E-shaped plate (51), and the other end is connected to the central tube (533) in a forward thread. One end of the second screw (532) is connected to the right E-shaped plate (51), and the other end is connected to the central tube (533) in a reverse thread.

6. A double-roller glue applicator for plywood production according to claim 1, characterized in that, The sheet metal transport assembly (60) includes a rectangular mounting frame (61), one end of which is rotatably connected to a drive roller (62), and the other end is rotatably connected to a driven roller (63). A plurality of support rollers (64) are spaced apart between the drive roller (62) and the driven roller (63). Both ends of the support rollers (64) are rotatably connected to the rectangular mounting frame (61). One end of the drive roller (62) passes through the rectangular mounting frame (61) and is connected to a servo motor (65). A conveyor belt (66) is connected between the drive roller (62) and the driven roller (63), and the top inner wall of the conveyor belt (66) is tumbledly connected to the support rollers (64).

7. A double-roller glue applicator for plywood production according to claim 6, characterized in that, The plate guiding mechanism includes plate guiding components (70) respectively arranged on both sides of the conveyor belt (66). The plate guiding components (70) include a guiding plate (71) and a mounting plate (72). The mounting plate (72) is connected to a hydraulic cylinder (73) that drives the guiding plate (71) to move. The hydraulic cylinder (73) is provided with guide rods (74) on both sides. The guide rods (74) include a guide rod (741) and a guide sleeve (742) embedded in the mounting plate (72). One end of the guide rod (741) is connected to the guiding plate (71), and the other end passes through the guide sleeve (742) and is slidably connected to it.

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