CN210819977U

CN210819977U - Furniture board punching machine tool

Info

Publication number: CN210819977U
Application number: CN201921485467.4U
Authority: CN
Inventors: 贾福景
Original assignee: Tangshan Jiuzhou Shun'an Wood Industry Co ltd
Current assignee: Tangshan Jiuzhou Shun'an Wood Industry Co ltd
Priority date: 2019-09-07
Filing date: 2019-09-07
Publication date: 2020-06-23
Anticipated expiration: 2029-09-07

Abstract

The utility model discloses a furniture plank lathe of punching uses at plank production technical field, and its technical scheme main points are: the automatic feeding machine comprises a rack, a workbench is arranged on one side of the rack along the length direction, a transverse direct-push cylinder is arranged on the workbench, a transverse push plate is fixedly connected onto a piston rod of the transverse direct-push cylinder, two first driving motors are arranged on one side, deviating from the rack, of the transverse push plate, a motor shaft of each first driving motor penetrates through the transverse push plate and is connected with a transverse drill bit, a longitudinal direct-push cylinder is further arranged below the rack, a longitudinal push plate is fixedly connected onto a piston rod of the longitudinal direct-push cylinder, two second driving motors are arranged at the bottom of the longitudinal push plate, a motor shaft of each second driving motor penetrates through the longitudinal push plate and is connected with a longitudinal drill bit, and a discharging frame is; has the technical effects that: the whole punching process is convenient and fast, and the transverse punching and the longitudinal punching of the side surface and the bottom of the wood board are realized, so that the production requirement is met.

Description

Furniture board punching machine tool

Technical Field

The utility model relates to a plank production technical field, in particular to furniture plank lathe of punching.

Background

At present, in the production technology of furniture, a large number of wood boards are needed, however, in the processing process of the wood boards, the wood boards need to be punched so as to facilitate subsequent assembly and splicing.

Chinese patent with publication number CN206066620U discloses a plank puncher, the structure of which contains a frame, a punching device arranged on the frame, the punching device comprises a support frame, a motor with an output end placed downwards and provided with a drill, a lifting cylinder arranged on the support frame and driving a motor to move up and down, two positioning cylinders respectively arranged on two sides of the motor and with an output end placed downwards, and the output end of each positioning cylinder is provided with a rubber press block.

However, although the existing wood board punching machine can punch the wood board, the existing wood board punching machine can only longitudinally punch the wood board from the upper side, cannot transversely punch the side face of the wood board, is single in punching direction, and cannot meet the production requirement for the wood board which needs to be transversely punched and longitudinally punched.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a furniture plank lathe of punching, its advantage is: the whole punching process is convenient and fast, and the transverse punching and the longitudinal punching of the side surface and the bottom of the wood board are realized, so that the production requirement is met.

The above technical purpose of the present invention can be achieved by the following technical solutions: the utility model provides a furniture plank lathe of punching, includes the frame, the frame is equipped with the workstation along one side of length direction, the workstation upper surface is equipped with the horizontal straight push cylinder that the piston rod stretches out and draws back to the frame, transversely directly push away fixedly connected with horizontal push pedal on the piston rod of cylinder, one side that horizontal push pedal deviates from the frame is equipped with two first driving motor along the horizontal straight push cylinder symmetry, horizontal push pedal is worn to establish by first driving motor's motor shaft, and is connected with the horizontal drill bit that is used for punching for the plank side, the frame below still is equipped with the vertical straight push cylinder that the piston rod upwards stretches out and draws back, fixedly connected with vertical push pedal on the piston rod of vertical straight push cylinder, vertical push pedal bottom is equipped with two second driving motor along vertical straight push cylinder symmetry, vertical push pedal is worn to establish by second driving motor's motor shaft, and is connected with the vertical drill bit that is used for vertically, and a material placing frame is arranged on one side of the rack, which deviates from the workbench.

Through the technical scheme, when needs punch the plank, operating personnel at first remove the plank to the blowing frame on, then promote the plank to the department of punching of frame, and start first driving motor and second driving motor, the motor shaft through first driving motor and second driving motor drives horizontal drill bit and vertical drill bit high-speed rotation respectively, can drive horizontal straight push cylinder and vertical straight push cylinder this moment, horizontal straight push cylinder and vertical straight push cylinder's piston rod will promote horizontal push plate and vertical push plate respectively and remove towards the plank, thereby drive high-speed pivoted horizontal drill bit and vertical drill bit and remove towards the plank, until boring the plank inside, alright completion is to the work of punching of plank. The whole punching process is convenient and fast, and the transverse punching and the longitudinal punching of the side surface and the bottom of the wood board are realized, so that the production requirement is met.

The utility model discloses further set up to: the wood board pressing device is characterized in that a pressing plate used for pressing a wood board is arranged at the position, located at the punching hole, of the rack in the length direction, two lifting cylinders are arranged above the rack, and piston rods of the two lifting cylinders penetrate through the rack downwards and are connected to two ends of the pressing plate.

Through above-mentioned technical scheme, when pushing away the plank to the department of punching of frame when punching, operating personnel can drive two lift cylinders simultaneously, and the piston rod of two lift cylinders will promote the clamp plate downstream, until the clamp plate compresses tightly at the plank upper surface to firmly fix the position at plank place, reduce horizontal drill bit and vertical drill bit and creep into the inside in-process that punches that carries out of plank, lead to the possibility that the position of plank takes place the skew, thereby guaranteed the precision of punching of plank.

The utility model discloses further set up to: the bottom of the pressing plate is provided with a plurality of protection plates made of the same material as the wood plate along the length direction.

Through above-mentioned technical scheme, the setting has the guard plate of the same material with the plank, can play the effect of protection plank to the in-process that the clamp plate that reduces metal material compressed tightly the plank leads to the possibility of plank surface by the extrusion indentation, in order to guarantee the pleasing to the eye on plank surface.

The utility model discloses further set up to: the frame is located punch hole department and still is equipped with the fishback along length direction, two horizontal drill bit all wears to establish between two adjacent broach of fishback, one side upper portion that the frame deviates from the workstation and is equipped with the slide rail along length direction, one side upper portion that the frame deviates from the workstation and still is equipped with a plurality of location cylinders along length direction, the location cylinder slides through the slider and connects in the slide rail, the both sides threaded connection that the slider is located the location cylinder has the butterfly bolt who is used for the fixed positioning cylinder.

Through the technical scheme, operating personnel can adjust the distance of location cylinder to horizontal drill bit and vertical drill bit through broach on the fishback, the piston rod downstream of drive location cylinder this moment, then promote the plank and make the terminal surface of plank support tightly on the piston rod of location cylinder, thereby can realize punching the location of initial position to the plank, after punching the completion, the piston rod upstream that can drive the location cylinder breaks away from the plank, then promote the plank forward, cause the terminal surface of plank to support tightly on the piston rod of the location cylinder of next position of adjusting in advance, and the interval of next location cylinder and previous location cylinder is the twice of interval between two horizontal drill bits, thereby guaranteed the homogeneity of the plank interval of punching.

The utility model discloses further set up to: the blowing frame all is equipped with a plurality of leading wheels along length direction's both sides and the frame one side that deviates from the workstation.

Through above-mentioned technical scheme, set up the leading wheel and help operating personnel to promote the plank to remove more easily to play the effect of laborsaving.

The utility model discloses further set up to: the horizontal straight push cylinder is equipped with the support frame that the bottom was fixed on the workstation surface towards one side of frame, the horizontal straight push cylinder slides through the sleeve and connects on the support frame, it rotates the regulation pole of connection in the sleeve to go back threaded connection on the support frame, the telescopic one end is kept away from to the regulation pole is equipped with the hand wheel.

Through above-mentioned technical scheme, can rotate the regulation pole and drive sleeve and transversely directly push away the cylinder and reciprocate along the support frame, and then drive horizontal push pedal and two horizontal drill bits and reciprocate to reach the purpose of adjusting two horizontal drill bit upper and lower positions, thereby adapted to the needs that punch to the plank side intermediate position of different thickness.

The utility model discloses further set up to: the slide rail deviates from one side of the rack and is provided with scale marks along the length direction.

Through the technical scheme, an operator can observe the distance between two adjacent positioning cylinders through the scale marks visually, so that the operator can adjust the position where the positioning cylinders are located quickly and accurately, the distance between the two adjacent positioning cylinders is twice of the distance between the two transverse drill bits, the uniformity of the wood plate punching distance is further guaranteed, and the problem that the distance error and the workload are increased due to artificial measurement is solved.

The utility model discloses further set up to: one side that the frame was kept away from to the blowing frame is rotated and is connected with the pivot, the one end fixedly connected with connecting rod of frame is kept away from in the pivot, still be equipped with supplementary direct-push cylinder on the lateral wall that the frame was kept away from to the blowing frame, the piston rod of supplementary direct-push cylinder articulates the one end of keeping away from the pivot at the connecting rod, the one end fixedly connected with that the connecting rod was kept away from in the pivot is used for compressing tightly the layering of plank.

Through the technical scheme, operating personnel can drive the supplementary cylinder that directly pushes away, and the supplementary piston rod that directly pushes away the cylinder promotes the connecting rod forward and rotates, drives the pivot through the connecting rod and rotates to drive the layering and turn to the plank and compress tightly on the plank surface, thereby keep away from the one side of frame with the plank and fix, reduce the clamp plate and compress tightly the in-process that the plank punched, lead to the plank to keep away from the possibility of one side perk of frame, thereby guaranteed the quality of punching of plank.

To sum up, the utility model discloses following beneficial effect has:

1. the whole punching process is convenient and quick, and double-side punching in the transverse direction of the side surface of the wood board and the longitudinal direction of the bottom of the wood board is realized, so that the production requirement is met;

2. the pressing plate is tightly pressed on the upper surface of the wood board, so that the position of the wood board is firmly fixed, the possibility of the position deviation of the wood board caused by the process that the transverse drill bit and the longitudinal drill bit are drilled into the wood board for punching is reduced, and the punching precision of the wood board is ensured;

3. the distance from the positioning cylinder to the transverse drill bit and the longitudinal drill bit can be adjusted through the comb teeth on the comb plate, so that the positioning of the initial wood plate punching position can be realized.

Drawings

Fig. 1 is a rear view of the overall structure of the present invention.

Fig. 2 is a front view of the overall structure of the present invention.

Fig. 3 is an enlarged view of a portion a in fig. 2.

Fig. 4 is an enlarged view of a portion B in fig. 2.

Fig. 5 is a front view of the overall structure of the present invention for embodying the placement of the wooden board on the material placing frame.

Fig. 6 is a schematic structural view for embodying the pressing bar pressing wood board of the present invention.

Fig. 7 is an enlarged view of a portion C in fig. 6.

Fig. 8 is a schematic structural view for showing the connection between the support frame and the sleeve according to the present invention.

Reference numerals: 1. a frame; 2. a work table; 3. a transverse direct-push cylinder; 4. a transverse push plate; 5. a first drive motor; 6. a lateral drill bit; 7. a longitudinal straight pushing cylinder; 8. a longitudinal push plate; 9. a second drive motor; 10. a longitudinal drill bit; 11. a material placing frame; 12. pressing a plate; 13. a lifting cylinder; 14. a protection plate; 15. a comb plate; 16. a slide rail; 17. positioning the air cylinder; 18. a slider; 19. a butterfly bolt; 20. a guide wheel; 21. a support frame; 22. a sleeve; 23. adjusting a rod; 24. a hand wheel; 25. scale lines; 26. a rotating shaft; 27. a connecting rod; 28. an auxiliary direct-push cylinder; 29. layering; 30. a wood board.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example 1: a furniture board punching machine tool comprises a frame 1, a workbench 2 is arranged on one side of the frame 1 along the length direction, a transverse straight push cylinder 3 with a piston rod stretching towards the frame 1 is arranged on the upper surface of the workbench 2, a transverse push plate 4 is fixedly connected onto the piston rod of the transverse straight push cylinder 3, two first driving motors 5 symmetrical along the transverse straight push cylinder 3 are arranged on one side of the transverse push plate 4 departing from the frame 1, a motor shaft of each first driving motor 5 penetrates through the transverse push plate 4 and is connected with a transverse drill 6 (shown in figure 3) used for punching the side surface of a board 30, a longitudinal straight push cylinder 7 with a piston rod stretching upwards is further arranged below the frame 1, a longitudinal push plate 8 is fixedly connected onto the piston rod of the longitudinal straight push cylinder 7, two second driving motors 9 symmetrical along the longitudinal straight push cylinder 7 are arranged at the bottom of the longitudinal push plate 8, and a motor shaft of each second driving motor 9 penetrates through the longitudinal push plate 8, and is connected with a longitudinal drill 10 (see fig. 3) for longitudinally drilling the wooden board 30.

As shown in fig. 5, a pressing plate 12 for compressing the wood board 30 is arranged at the punching position of the frame 1 along the length direction, a plurality of protection plates 14 made of the same material as the wood board 30 are arranged at the bottom of the pressing plate 12 along the length direction, two lifting cylinders 13 are arranged above the frame 1, and piston rods of the two lifting cylinders 13 penetrate through the frame 1 downwards and are connected to two ends of the pressing plate 12.

As shown in fig. 1, one side of the frame 1 departing from the workbench 2 is provided with a material placing frame 11, and the two sides of the material placing frame 11 along the length direction and one side of the frame 1 departing from the workbench 2 are provided with a plurality of guide wheels 20.

Referring to fig. 1 and 2, when a wood board 30 (see fig. 5) needs to be punched, an operator firstly moves the wood board 30 to the material placing frame 11, and pushes the wood board 30 to the punching hole of the rack 1, then simultaneously drives the two lifting cylinders 13, the piston rods of the two lifting cylinders 13 push the pressing plate 12 to move downwards until the pressing plate 12 presses the upper surface of the wood board 30, so as to firmly fix the position of the wood board 30, at this time, the first driving motor 5 and the second driving motor 9 are started, the motor shafts of the first driving motor 5 and the second driving motor 9 respectively drive the transverse drill 6 (see fig. 3) and the longitudinal drill 10 (see fig. 3) to rotate at a high speed, then simultaneously drives the transverse straight pushing cylinder 3 and the longitudinal straight pushing cylinder 7, the piston rods of the transverse straight pushing cylinder 3 and the longitudinal straight pushing cylinder 7 respectively push the transverse pushing plate 4 and the longitudinal pushing plate 8 to move towards the wood board 30, thereby driving the transverse drill 6 and the longitudinal drill 10 which rotate at high speed to move towards the wood board 30 until the wood board 30 is drilled, and completing the punching work of the wood board 30.

As shown in fig. 3 and 5, the whole punching process is convenient and quick, and the punching of both the lateral side of the wood board 30 and the longitudinal side of the bottom of the wood board 30 is realized, so that the production requirement is met; and the wood board 30 is firmly fixed by the pressing plate 12, so that the possibility of position deviation of the wood board 30 caused by the process that the transverse drill 6 and the longitudinal drill 10 drill into the wood board 30 for punching is reduced, and the punching precision of the wood board 30 is further ensured.

As shown in fig. 5, in addition, the protection plate 14 having the same material as the wood board 30 is provided to protect the wood board 30, so as to reduce the possibility of indentation on the surface of the wood board 30 caused by the pressing plate 12 made of a metal material pressing against the wood board 30, thereby ensuring the aesthetic appearance of the surface of the wood board 30.

As shown in fig. 5, the guide wheels 20 are provided to help the operator to move the wooden board 30 more easily, thereby saving power.

As shown in fig. 2 and 4, the rack 1 is located the perforation and still is equipped with the fishback 15 along length direction, two horizontal drill bits 6 (as in fig. 3) all wear to establish between two adjacent broach of fishback 15, the rack 1 deviates from one side upper portion of workstation 2 (as in fig. 1) and is equipped with the slide rail 16 along length direction, the rack 1 deviates from one side upper portion of workstation 2 and still is equipped with a plurality of location cylinders 17 along length direction, location cylinders 17 slide and connect in slide rail 16 through slider 18, slider 18 is located the both sides threaded connection of location cylinders 17 and is used for the butterfly bolt 19 of fixed position cylinders 17.

As shown in fig. 4 and 5, the operator can adjust the distance from the positioning cylinder 17 to the transverse drill bit 6 (shown in fig. 3) and the longitudinal drill bit 10 (shown in fig. 3) by means of the comb teeth on the comb plate 15 (shown in fig. 2), at this time, the piston rod of the positioning cylinder 17 is driven to move downwards, the wooden plate 30 is then pushed so that the end face of the wooden plate 30 abuts against the piston rod of the positioning cylinder 17, thereby realizing the positioning of the initial position of the wood board 30 for punching, after the punching is finished, the piston rod of the positioning cylinder 17 can be driven to move upwards to separate from the wood board 30, then the wood board 30 is pushed forward, so that the end surface of the wood board 30 is abutted against the piston rod of the next positioning cylinder 17 with the preset position, and the distance between the next positioning cylinder 17 and the previous positioning cylinder 17 is twice of the distance between the two transverse drills 6, so that the uniformity of the punching distance of the wood board 30 is ensured.

The operation process is as follows: when the wood board 30 needs to be punched, an operator firstly moves the wood board 30 to the material placing frame 11, pushes the wood board 30 to the punching hole of the rack 1, then simultaneously drives the two lifting cylinders 13, the piston rods of the two lifting cylinders 13 push the pressing plate 12 to move downwards until the pressing plate 12 is pressed on the upper surface of the wood board 30, so as to firmly fix the position of the wood board 30, at the moment, the first driving motor 5 and the second driving motor 9 are started, the transverse drill bit 6 and the longitudinal drill bit 10 are respectively driven to rotate at high speed by the motor shafts of the first driving motor 5 and the second driving motor 9, then simultaneously drives the transverse straight pushing cylinder 3 and the longitudinal straight pushing cylinder 7, the piston rods of the transverse straight pushing cylinder 3 and the longitudinal straight pushing cylinder 7 respectively push the transverse push plate 4 and the longitudinal push plate 8 to move towards the wood board 30, so as to drive the transverse drill bit 6 and the longitudinal drill bit 10 which rotate at high speed to move towards the wood board, the punching work of the wood board 30 can be completed until the wood board 30 is drilled.

Example 2: the utility model provides a furniture plank lathe of punching, as figure 3 and figure 6, the difference with embodiment 1 lies in, slide rail 16 deviates from one side of frame 1 and is equipped with scale mark 25 along length direction, thereby operating personnel can be through the audio-visual distance of observing between two adjacent location cylinders 17 of scale mark 25, and then be convenient for operating personnel adjust the position at location cylinder 17 place fast accurately, with satisfy the distance between two adjacent location cylinders 17 be two times of interval between two horizontal drill bits 6, thereby further guarantee the homogeneity of the interval of punching to plank 30, reduce through the artificial problem that leads to distance error and work load increase of measuring.

As shown in fig. 3 and 8, a support frame 21 with the bottom fixed on the surface of the worktable 2 is arranged on one side of the transverse direct-pushing cylinder 3 facing the rack 1, the transverse direct-pushing cylinder 3 is connected to the support frame 21 in a sliding manner through a sleeve 22, an adjusting rod 23 with the bottom rotatably connected in the sleeve 22 is further connected to the support frame 21 through a thread, and a hand wheel 24 is arranged at one end of the adjusting rod 23 far away from the sleeve 22. An operator can rotate the adjusting rod 23 to drive the sleeve 22 and the transverse direct-push cylinder 3 to move up and down along the supporting frame 21, and further drive the transverse push plate 4 and the two transverse drill bits 6 to move up and down, so that the purpose of adjusting the up-and-down positions of the two transverse drill bits 6 is achieved, and the requirement of punching the middle positions of the side surfaces of the wood boards 30 with different thicknesses is met.

As shown in fig. 6 and 7, one side of the discharging frame 11, which is far away from the rack 1, is rotatably connected with a rotating shaft 26, one end of the rotating shaft 26, which is far away from the rack 1, is fixedly connected with a connecting rod 27, the side wall of the discharging frame 11, which is far away from the rack 1, is also provided with an auxiliary direct-pushing cylinder 28, a piston rod of the auxiliary direct-pushing cylinder 28 is hinged at one end of the connecting rod 27, which is far away from the rotating shaft 26, and one end of the rotating shaft 26, which. An operator can drive the auxiliary direct-pushing cylinder 28, a piston rod of the auxiliary direct-pushing cylinder 28 pushes the connecting rod 27 forwards to rotate, the connecting rod 27 drives the rotating shaft 26 to rotate, so that the pressing strip 29 is driven to turn to the wood board 30 and is pressed on the surface of the wood board 30, one side, far away from the rack 1, of the wood board 30 is fixed, the possibility that one side, far away from the rack 1, of the wood board 30 tilts due to the fact that the pressing plate 12 presses the wood board 30 to punch is reduced, and therefore the punching quality of the wood board 30 is guaranteed.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a furniture plank hole punching machine, includes frame (1), its characterized in that: the wood board punching machine is characterized in that a workbench (2) is arranged on one side of the rack (1) along the length direction, a transverse straight push cylinder (3) with a piston rod stretching towards the rack (1) is arranged on the upper surface of the workbench (2), a transverse push plate (4) is fixedly connected onto the piston rod of the transverse straight push cylinder (3), two first driving motors (5) symmetrical along the transverse straight push cylinder (3) are arranged on one side of the transverse push plate (4) deviating from the rack (1), a motor shaft of each first driving motor (5) penetrates through the transverse push plate (4) and is connected with a transverse drill bit (6) used for punching the side face of a wood board (30), a longitudinal straight push cylinder (7) with a piston rod stretching upwards is further arranged below the rack (1), a longitudinal push plate (8) is fixedly connected onto the piston rod of the longitudinal straight push cylinder (7), two second driving motors (9) symmetrical along the longitudinal straight push cylinder (7) are arranged at the bottom of the longitudinal push plate (, the motor shaft of second driving motor (9) wears to establish vertical push pedal (8) to be connected with and be used for vertical drill bit (10) that punch to plank (30), one side that frame (1) deviates from workstation (2) is equipped with blowing frame (11).

2. The furniture wood board punching machine of claim 1, wherein: frame (1) are located punch hole department and are equipped with clamp plate (12) that are used for compressing tightly plank (30) along length direction, frame (1) top is equipped with two lift cylinders (13), two the piston rod of lift cylinder (13) all wears to establish frame (1) downwards, and is connected in the both ends of clamp plate (12).

3. The furniture wood board hole punching machine tool according to claim 2, characterized in that: the bottom of the pressing plate (12) is provided with a plurality of protection plates (14) which are made of the same material as the wood plate (30) along the length direction.

4. The furniture wood board punching machine of claim 1, wherein: frame (1) are located punch hole department and still are equipped with fishback (15), two along length direction horizontal drill bit (6) are all worn to establish between two adjacent broach of fishback (15), frame (1) deviate from one side upper portion of workstation (2) and are equipped with slide rail (16) along length direction, frame (1) deviate from one side upper portion of workstation (2) and still are equipped with a plurality of location cylinders (17) along length direction, location cylinder (17) slide through slider (18) and connect in slide rail (16), the both sides threaded connection that slider (18) are located location cylinder (17) has butterfly bolt (19) that are used for fixed positioning cylinder (17).

5. The furniture wood board punching machine of claim 1, wherein: the material placing frame (11) is provided with a plurality of guide wheels (20) along the two sides of the length direction and one side of the frame (1) departing from the workbench (2).

6. The furniture wood board punching machine of claim 1, wherein: transversely directly push away cylinder (3) and be equipped with bottom support frame (21) of fixing on workstation (2) surface towards one side of frame (1), transversely directly push away cylinder (3) and slide through sleeve (22) and connect on support frame (21), it has bottom to rotate regulation pole (23) of connection in sleeve (22) to go back threaded connection on support frame (21), the one end of keeping away from sleeve (22) in regulation pole (23) is equipped with hand wheel (24).

7. The furniture wood board punching machine of claim 4, wherein: the slide rail (16) deviates from one side of the rack (1) and is provided with scale marks (25) along the length direction.

8. The furniture wood board punching machine of claim 1, wherein: frame (1) is kept away from in blowing frame (11) one side rotation is connected with pivot (26), the one end fixedly connected with connecting rod (27) of frame (1) are kept away from in pivot (26), still be equipped with supplementary straight push cylinder (28) on the lateral wall of frame (1) is kept away from in blowing frame (11), supplementary straight push cylinder's (28) piston rod articulates the one end of keeping away from pivot (26) in connecting rod (27), the one end fixedly connected with that connecting rod (27) were kept away from in pivot (26) is used for compressing tightly layering (29) of plank (30).