Laser cutting machine

Abstract

The utility model discloses a laser cutting machine, which relates to the field of plate cutting equipment and comprises two supports, a transmission mechanism and a cutting mechanism, the two supports are respectively positioned on two sides of the transmission mechanism along the width direction, the cutting mechanism is positioned at the upper end parts of the supports, and the two supports are parallel to each other. Baffles are fixedly arranged on the sides, away from each other, of the two supports in the vertical direction, the two baffles are arranged in the length direction of the supports, transverse plates are fixedly arranged at the upper ends of the two baffles in the horizontal direction, vertical plates are fixedly arranged on the sides, away from each other, of the two transverse plates in the vertical direction, a cover plate is fixedly arranged between the two vertical plates, and plugging mechanisms are arranged on the two sides, in the length direction, of the cover plate. The vertical plates are used for blocking the openings in the two sides of the cover plate in the length direction, the vertical plates are provided with through openings in the length direction, one vertical plate is fixedly provided with a dust removal cover which is right opposite to the through openings, and the other vertical plate is fixedly provided with a plurality of air blowers which are located in the through openings. The device has the effect of improving the production environment of a production workshop.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of plate cutting equipment especially to a laser cutting machine. BACKGROUND

[0002] At present, in the cutting of plate, laser cutting machine is widely used, laser cutting processing is with invisible light beam instead of traditional mechanical knife, has high precision, cuts fast, is not limited to cutting pattern restriction, automatic layout saves material, cutout smooth, processing cost is low and so on, when cutting the plane, tubular plate, the cutting table applied is different.

[0003] The related technology can refer to the Chinese patent application with the announcement number CN219293031U, which discloses a kind of laser cutting machine, specifically relates to the technical field of laser cutting machine, including cutting table, cutting table top is equipped with the laser cutting head for cutting, cutting table top is equipped with the lifting mechanism of driving laser cutting head lifting;Lifting mechanism includes two lifting boxes fixedly installed in the top of cutting table, two lifting boxes are located at the front and rear sides of cutting table top respectively, reciprocating screw rod is movably connected in lifting box inside by bearing, reciprocating screw rod top end penetrates lifting box and extends out lifting box top end, first motor is fixedly arranged at the top end of reciprocating screw rod located at rear side, first screw block is screw-connected on the outer end of reciprocating screw rod, laser cutting head is located between two first screw blocks.This laser cutting machine can not only cut different size plates, but also cut plates at different positions.

[0004] For the related technology in the above, the laser cutting machine will produce a large amount of debris in the cutting process, since there is no shelter around the laser cutting machine, part of the debris will float in the air, causing air pollution in production workshop, and the production environment is poor. UTILITY MODEL CONTENT

[0005] In order to improve the production environment of production workshop, the application provides a kind of laser cutting machine.

[0006] The application provides a kind of laser cutting machine, adopt following technical scheme:

[0007] The utility model provides a kind of laser cutting machine, including two supports, transmission mechanism and cutting mechanism, two supports are located transmission mechanism two sides along width direction respectively, for supporting transmission mechanism, cutting mechanism is located support upper end, for cutting plate, two supports are parallel to each other, the side of two supports away from each other is vertically fixed with baffle, two baffles are along the length direction of support, the upper end of two baffles is horizontally fixed with horizontal plate, the side of two horizontal plates away from each other is vertically fixed with vertical plate, cover plate is fixed between two vertical plates, cover plate is used to connect two vertical plates, the both sides of cover plate along length direction are equipped with plugging mechanism, for the plugging of the both sides of cover plate along length direction, vertical plate is opened with access along length direction, wherein one vertical plate is fixed with dust hood, dust hood is opposite with access, and located the side of vertical plate close to transmission mechanism, and another vertical plate is fixed with a plurality of air blower, a plurality of air blower is located in access.

[0008] By adopting the above technical scheme, the support supports the transmission mechanism, the cutting mechanism cuts the plate, the baffle shields the two sides of the transmission mechanism, the horizontal plate and the vertical plate cooperate with each other to leave a certain space above the support, which is used for removing the dust generated during cutting of the plate, the cover plate blocks the opening above the support, the plugging mechanism blocks the two sides of the vertical plate along the length direction, the air blower in the access discharges the dust generated during cutting from the dust hood, and the production environment of the production workshop is improved.

[0009] Optionally, the transmission mechanism includes a plurality of transmission rollers and a plurality of driven rollers, the plurality of transmission rollers and the plurality of driven rollers are alternately distributed along the length direction of the support, the transmission rollers and the driven rollers are vertically rotatably connected with the support, the side close to the two supports is fixed with a dust collection bin, the dust collection bin is located below the transmission mechanism, and the side away from the two supports is fixed with a driving device for driving the transmission rollers to rotate.

[0010] By adopting the above technical scheme, the driving device drives the transmission rollers to rotate, the plate moves on the transmission rollers, drives the driven rollers to rotate, the dust collection bin collects the waste generated during cutting, reduces the pollution of smoke and dust generated during cutting to the air, and improves the production environment of the production workshop.

[0011] Optionally, a plurality of moving grooves are formed in the side close to the two supports, the moving grooves are arranged along the length direction of the support, the two ends of the transmission rollers along the length direction are located in the moving grooves, an elastic member is arranged in the moving groove for sliding the transmission rollers in the moving groove, one end of the elastic member is fixedly connected with the support, and the other end is rotatably connected with the transmission roller.

[0012] Through the above technical scheme, when the waste is stuck between the transmission roller and the driven roller, the transmission roller rotates, the waste pushes the driven roller to slide in the moving groove, and then the waste falls into the dust collecting bin, and the elastic member pushes the driven roller to move to the initial position, thereby improving the convenience of cutting waste cleaning.

[0013] Optionally, the blocking mechanism comprises two rectangular plates, the two rectangular plates are located on both sides of the cover plate along the length direction, the lower end of the rectangular plate is attached to the upper end of the support, and the upper end of the rectangular plate is vertically hinged to the cover plate.

[0014] Through the above technical scheme, the two rectangular plates block both sides of the transmission mechanism along the length direction, the rectangular plate is turned over along the hinge during feeding, and the rectangular plate blocks the opening during cutting, thereby reducing the air pollution caused by smoke and dust during cutting and improving the production environment of the production workshop.

[0015] Optionally, the lower end of the cover plate is fixedly provided with a double-acting cylinder, the double-acting cylinder is horizontally arranged along the length direction of the cover plate, two output ends of the double-acting cylinder are fixedly provided with push rods, the push rods are horizontally arranged along the length direction of the cover plate, and a sliding groove is vertically formed on one side of the rectangular plate, a sliding block is arranged in the sliding groove, the sliding block is vertically and slidably connected to the rectangular plate, and one end of the push rod away from the double-acting cylinder is vertically hinged to the sliding block.

[0016] Through the above technical scheme, the output end of the double-acting cylinder is elongated to drive the push rod away from the double-acting cylinder, the push rod drives the sliding block to slide along the sliding groove, and then the rectangular plate is turned over along the hinge, thereby improving the convenience of turning over the rectangular plate.

[0017] Optionally, the cutting mechanism comprises a horizontal frame, a vertical frame and a laser cutter, the horizontal frame is arranged on the upper end of the support and reciprocates along the length direction of the support, the vertical frame is slidably connected to the horizontal frame along the length direction of the horizontal frame and reciprocates along the width direction of the transmission mechanism, and the laser cutter is arranged on the lower end of the vertical frame and used for cutting the plate.

[0018] Through the above technical scheme, the horizontal frame and the vertical frame cooperate to make the laser cutter located at a specified position, and then the plate is cut, thereby improving the convenience of cutting the plate.

[0019] Optionally, a bidirectional screw is rotatably connected between the two supports, the bidirectional screw is located between the transmission mechanism and the dust collection bin and is parallel to the transmission roller, two guide rods are fixedly arranged between the two supports, the two guide rods are respectively located on both sides of the support along the length direction and are parallel to the bidirectional screw, both ends of the bidirectional screw are threadedly connected with moving blocks, the guide rods pass through the two moving blocks and are slidably connected with the moving blocks, two vertical rods are fixedly arranged on the upper end of the moving block in the vertical direction, the two vertical rods are located at both ends of the upper end of the moving block along the length direction, and a connecting plate is fixedly arranged between the two vertical rods, the connecting plate is located above the transmission mechanism, and the support is provided with a driving motor for driving the bidirectional screw to rotate.

[0020] By adopting the above technical scheme, the driving motor drives the bidirectional screw to rotate, and then drives the two moving blocks to move close to or away from each other, the two guide rods limit the moving blocks, the moving blocks and the vertical rods cooperate to drive the two connecting plates to move close to each other, and the board is fixed, thereby improving the stability during cutting.

[0021] Optionally, a plurality of anti-skid lines are fixedly arranged on one side of the two connecting plates close to each other, and the anti-skid lines are arranged in the vertical direction.

[0022] By adopting the above technical scheme, the anti-skid lines are used to enhance the fixing effect of the connecting plates on the board, and the stability during cutting is further improved.

[0023] In summary, the present application has at least one of the following beneficial technical effects:

[0024] 1. The horizontal plate and the vertical plate cooperate with each other to leave a certain space above the support, the cover plate seals the opening above the support, the sealing mechanism seals both sides of the vertical plate along the length direction, and the blower in the through opening exhausts the dust generated during cutting from the dust hood, thereby improving the production environment of the production workshop;

[0025] 2. The extension of the output end of the bidirectional cylinder drives the push rod to move, the push rod drives the sliding block to slide along the sliding groove, and then the rectangular plate is flipped along the hinge, thereby improving the convenience of flipping the rectangular plate;

[0026] 3. The driving motor drives the bidirectional screw to rotate, and then drives the two moving blocks to move close to or away from each other, the two guide rods limit the moving blocks, the moving blocks and the vertical rods cooperate to drive the two connecting plates to move close to each other, and the board is fixed, thereby improving the stability during cutting. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of a laser cutting machine.

[0028] Figure 2 It is a schematic diagram of the internal structure of a laser cutting machine.

[0029] Figure 3 is a schematic view highlighting the connection relationship between the driven roller and the support.

[0030] The reference signs are as follows: 1, support; 11, baffle; 12, horizontal plate; 13, vertical plate; 131, through opening; 132, dust removal cover; 133, air blower; 14, cover plate; 15, dust collection bin; 16, moving groove; 17, elastic member; 2, transmission mechanism; 21, transmission roller; 22, driven roller; 3, cutting mechanism; 31, horizontal frame; 32, vertical frame; 33, laser cutter; 4, plugging mechanism; 41, rectangular plate; 42, bidirectional air cylinder; 43, push rod; 44, sliding block; 45, sliding groove; 5, bidirectional lead screw; 51, driving motor; 52, guide rod; 53, moving block; 54, vertical rod; 55, connecting plate; 56, anti-skid pattern. DETAILED DESCRIPTION

[0031] The application will be further described in detail below with reference to all the drawings.

[0032] The application discloses a laser cutting machine. EMBODIMENT

[0033] Reference Figure 1 and Figure 2 A laser cutting machine comprises two supports 1 and a transmission mechanism 2, the two supports 1 are respectively located at two sides of the transmission mechanism 2 along the width direction and are used for supporting the transmission mechanism 2, the transmission mechanism 2 comprises a plurality of transmission rollers 21 and a plurality of driven rollers 22, the plurality of transmission rollers 21 and the plurality of driven rollers 22 are alternately distributed along the length direction of the support 1 in sequence, the transmission roller 21 drives a plate to move, the plate is in contact with the driven roller 22, thereby driving the driven roller 22 to rotate, the transmission roller 21 and the driven roller 22 are rotationally connected to the support 1 along the vertical direction, and a driving device is arranged on the support 1 and drives all the transmission rollers 21 to rotate.

[0034] Reference Figure 1 and Figure 2 The two supports 1 are both provided with a baffle 11 on the side away from each other along the vertical direction, the two baffles 11 are arranged along the length direction of the support 1, the baffle 11 shields the two sides of the transmission mechanism 2, the upper end of the two baffles 11 is both fixedly provided with a horizontal plate 12 along the horizontal direction, the side away from each other of the two horizontal plates 12 is both fixedly provided with a vertical plate 13 along the vertical direction, the vertical plate 13 and the horizontal plate 12 are matched to leave a certain space above the support 1, the two vertical plates 13 are fixedly provided with a cover plate 14 therebetween, the cover plate 14 connects the two vertical plates 13, the cover plate 14 is provided with a plugging mechanism 4 on the two sides along the length direction, the cover plate 14 plugs the opening above the support 1, and the plugging mechanism 4 plugs the two sides of the vertical plate 13 along the length direction, thereby reducing the pollution of smoke and dust generated in the cutting process to the air.

[0035] ReferenceFigure 1 And Figure 2 The blocking mechanism 4 includes two rectangular plates 41, which are respectively located on both sides of the cover plate 14 along the length direction, the lower end of the rectangular plate 41 is attached to the upper end of the support 1, and the upper end of the rectangular plate 41 is vertically hinged to the cover plate 14. During feeding, the rectangular plate 41 is flipped along the hinge, and during cutting, the rectangular plate 41 blocks the opening to reduce air pollution caused by smoke and dust during cutting. The lower end of the cover plate 14 is fixedly provided with a double-acting cylinder 42, which is horizontally arranged along the length direction of the cover plate 14. The two output ends of the double-acting cylinder 42 are each fixedly provided with a push rod 43, which is horizontally arranged along the length direction of the cover plate 14. The output end of the double-acting cylinder 42 drives the push rod 43 to move.

[0036] Referring to Figure 1 And Figure 2 The side of the rectangular plate 41 that approaches each other is provided with a sliding groove 45 along the vertical direction, and the sliding groove 45 is provided with a sliding block 44 that is slidingly connected to the rectangular plate 41 along the vertical direction. The end of the push rod 43 away from the double-acting cylinder 42 is hingedly connected to the sliding block 44 along the vertical direction. The side of the rectangular plate 41 that approaches each other is provided with a sliding groove 45 along the vertical direction, and the sliding groove 45 is provided with a sliding block 44 that is slidingly connected to the rectangular plate 41 along the vertical direction. The end of the push rod 43 away from the double-acting cylinder 42 is hingedly connected to the sliding block 44 along the vertical direction. The output end of the double-acting cylinder 42 is elongated to drive the push rod 43 to move, and the push rod 43 drives the sliding block 44 to slide along the sliding groove 45, thereby flipping the rectangular plate 41 along the hinge, improving the convenience of flipping the rectangular plate 41.

[0037] Referring to Figure 1 And Figure 2 The cutting mechanism 3 includes a horizontal frame 31, a vertical frame 32, and a laser cutter 33. The horizontal frame 31 is located at the upper end of the support 1 and can reciprocate along the length direction of the support 1. The vertical frame 32 is slidingly connected to the horizontal frame 31 along the length direction of the horizontal frame 31 and reciprocates along the length direction of the transmission mechanism 2. The laser cutter 33 is arranged at the lower end of the vertical frame 32 and is used for cutting the plate.

[0038] Referring to Figure 1 And Figure 2The two supports 1 are rotationally connected with a bidirectional screw 5, a driving motor 51 is fixedly arranged on the support 1, an output shaft of the driving motor 51 is fixedly connected to one end of the bidirectional screw 5 and coaxially rotates, the bidirectional screw 5 is parallel to the transmission roller 21, two guide rods 52 are fixedly arranged between the two supports 1, the two guide rods 52 are respectively located on both sides of the support 1 along the length direction and are parallel to the bidirectional screw 5, both ends of the bidirectional screw 5 are threadedly connected with moving blocks 53, the guide rods 52 pass through the two moving blocks 53 and are slidingly connected with the moving blocks 53, the guide rods 52 limit the moving blocks 53, two vertical rods 54 are fixedly arranged on the upper end of the moving block 53 along the vertical direction, the two vertical rods 54 are located at both ends of the upper end of the moving block 53 along the length direction, a connecting plate 55 is arranged between the two vertical rods 54, the connecting plate 55 is located above the transmission mechanism 2, the driving motor 51 drives the bidirectional screw 5 to rotate, thereby driving the two moving blocks 53 to move close to or away from each other, the two guide rods 52 limit the moving blocks 53, the moving blocks 53 and the vertical rods 54 cooperate to drive the two connecting plates 55 to move close to each other, thereby fixing the plate, and the stability in the cutting process is improved.

[0039] With reference to Figure 2 A plurality of anti-skid lines 56 are fixedly arranged on one side of the two connecting plates 55 close to each other, the anti-skid lines 56 are arranged along the vertical direction, and the anti-skid lines 56 are used for enhancing the fixing effect of the connecting plate 55 on the plate, thereby further improving the stability in the cutting process.

[0040] With reference to Figure 2 And Figure 3 A plurality of moving grooves 16 are arranged on one side of the two supports 1 close to each other along the length direction of the support 1, both ends of the transmission roller 21 are located in the moving grooves 16, the transmission roller 21 can slide along the length direction of the moving groove 16, and an elastic member 17 is arranged in the moving groove 16, one end of the elastic member 17 is fixedly connected with the support 1, and the other end is rotationally connected with the transmission roller 21, when the waste is stuck between the transmission roller 21 and the driven roller 22, the transmission roller 21 rotates, the waste pushes the driven roller 22 to slide in the moving groove 16, thereby making the waste fall, the elastic member 17 pushes the driven roller 22 to move to the initial position, and a dust collecting bin 15 is fixedly arranged on one side of the two supports 1 close to each other, the dust collecting bin 15 is located below the bidirectional screw 5, the dust collecting bin 15 collects the waste generated in the cutting process, reduces the pollution of the smoke generated in the cutting process to the air, and improves the production environment of the production workshop.

[0041] With reference to Figure 2The vertical plate 13 is provided with an opening 131 along the length direction, and the opening 131 is horizontally arranged. One of the vertical plates 13 is fixedly provided with a dust cover 132, and the smoke and dust generated in the cutting process is discharged from the dust cover 132. The dust cover 132 is opposite to the opening 131 and is located at the side of the vertical plate 13 close to the transmission mechanism 2. The other vertical plate 13 is fixedly provided with a plurality of air blowers 133, and the plurality of air blowers 133 are located in the opening 131. The air blowers 133 discharge the flying dust generated in the cutting process from the dust cover 132, thereby improving the production environment of the production workshop.

[0042] The implementation principle of the laser cutting machine is as follows: the bidirectional cylinder 42 and the push rod 43 cooperate to open the two sides of the support 1 along the length direction, the transmission roller 21 drives the plate to move on the transmission mechanism 2, the bidirectional cylinder 42 is retracted, the lower end of the rectangular plate 41 is attached to the support 1, the opening of the support 1 is blocked, the driving motor 51 drives the bidirectional screw 5 to rotate, thereby driving the two moving blocks 53 to move close to or away from each other, the two guide rods 52 limit the moving blocks 53, the moving blocks 53 and the vertical rods 54 cooperate to drive the two connecting plates 55 to move close to each other, thereby fixing the plate, the horizontal frame 31 and the vertical frame 32 cooperate to make the laser cutting device 33 located at the specified position, thereby cutting the plate, the dust collection bin 15 collects the waste generated in the cutting process, and the air blower 133 discharges the flying dust generated in the cutting process from the dust cover 132, thereby improving the production environment of the production workshop.

[0043] The above are the preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, any equivalent changes made on the basis of the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A laser cutting machine comprising two supports (1), a transmission mechanism (2) and a cutting mechanism (3), the two supports (1) are respectively located at both sides of the transmission mechanism (2) along the width direction, used for supporting the transmission mechanism (2), and the cutting mechanism (3) is located at the upper end of the support (1), used for cutting plates, characterized in that: The two supports (1) are parallel to each other, and the sides, away from each other, of the two supports (1) are vertically and fixedly provided with baffles (11); the two baffles (11) are arranged along the length direction of the support (1); the upper ends of the two baffles (11) are fixedly provided with horizontal plates (12) in the horizontal direction; the sides, away from each other, of the two horizontal plates (12) are vertically and fixedly provided with vertical plates (13); the two vertical plates (13) are fixedly provided with a cover plate (14) therebetween; the cover plate (14) is used for connecting the two vertical plates (13); the cover plate (14) is provided with sealing mechanisms (4) on the two sides in the length direction, for sealing the openings on the two sides in the length direction of the cover plate (14); the vertical plate (13) is provided with an opening (131) in the length direction; the opening (131) is horizontally arranged; one of the vertical plates (13) is fixedly provided with a dust removal cover (132); the dust removal cover (132) is opposite to the opening (131) and is located on the side of the vertical plate (13) close to the transmission mechanism (2); the other vertical plate (13) is fixedly provided with a plurality of air blowers (133); the plurality of air blowers (133) are located in the opening (131).

2. A laser cutting machine as claimed in claim 1, characterized in that: The transmission mechanism (2) comprises a plurality of transmission rollers (21) and a plurality of driven rollers (22); the plurality of transmission rollers (21) and the plurality of driven rollers (22) are alternately arranged along the length direction of the support (1); the transmission roller (21) and the driven roller (22) are both rotationally connected to the support (1) in the vertical direction; the sides, close to each other, of the two supports (1) are fixedly provided with a dust collecting bin (15); the dust collecting bin (15) is located below the transmission mechanism (2); the sides, away from each other, of the two supports (1) are fixedly provided with a driving device, for driving the transmission roller (21) to rotate.

3. A laser cutting machine as claimed in claim 2, wherein: The sides, close to each other, of the two supports (1) are provided with a plurality of moving grooves (16); the moving grooves (16) are arranged along the length direction of the support (1); the two ends of the transmission roller (21) in the length direction are located in the moving groove (16); the moving groove (16) is provided with an elastic member (17), for driving the transmission roller (21) to slide in the moving groove (16); one end of the elastic member (17) is fixedly connected to the support (1); the other end of the elastic member (17) is rotationally connected to the transmission roller (21).

4. The laser cutting machine of claim 1, wherein: The sealing mechanism (4) comprises two rectangular plates (41); the two rectangular plates (41) are respectively located on the two sides in the length direction of the cover plate (14); the lower end of the rectangular plate (41) is attached to the upper end of the support (1); the upper end of the rectangular plate (41) is hingedly connected to the cover plate (14) in the vertical direction.

5. A laser cutting machine as claimed in claim 4, wherein: The lower end of the cover plate (14) is fixedly provided with a double-action pneumatic cylinder (42); the double-action pneumatic cylinder (42) is horizontally arranged along the length direction of the cover plate (14); the two output ends of the double-action pneumatic cylinder (42) are fixedly provided with push rods (43); the push rods (43) are horizontally arranged along the length direction of the cover plate (14); the sides, close to each other, of the rectangular plates (41) are vertically provided with sliding grooves (45); the sliding grooves (45) are provided with sliding blocks (44); the sliding blocks (44) are slidably connected to the rectangular plates (41) in the vertical direction; the ends, away from the double-action pneumatic cylinder (42), of the push rods (43) are hingedly connected to the sliding blocks (44) in the vertical direction.

6. A laser cutting machine as claimed in claim 1, characterized in that: The cutting mechanism (3) comprises a cross frame (31), a longitudinal frame (32) and a laser cutter (33), the cross frame (31) is arranged on the upper end of the support (1) and reciprocates along the length direction of the support (1), the longitudinal frame (32) is slidably connected with the cross frame (31) along the length direction of the cross frame (31) and reciprocates along the width direction of the transmission mechanism (2), and the laser cutter (33) is arranged on the lower end of the longitudinal frame (32) and is used for cutting the plate.

7. A laser cutting machine as claimed in claim 2, wherein: The two supports (1) are rotationally connected with a bidirectional screw rod (5), the bidirectional screw rod (5) is located between the transmission mechanism (2) and the dust collecting bin (15) and is parallel to the transmission roller (21), the two supports (1) are fixedly provided with two guide rods (52), the two guide rods (52) are located on the two sides of the support (1) along the length direction and are parallel to the bidirectional screw rod (5), the two ends of the bidirectional screw rod (5) are threadedly connected with moving blocks (53), the guide rods (52) pass through the two moving blocks (53) and are slidably connected with the moving blocks (53), the upper end of the moving block (53) is fixedly provided with two vertical rods (54) in the vertical direction, the two vertical rods (54) are located on the two ends of the upper end of the moving block (53) along the length direction, the two vertical rods (54) are fixedly provided with a connecting plate (55) between them, the connecting plate (55) is located above the transmission mechanism (2), and the support (1) is provided with a fixed driving motor (51) for driving the bidirectional screw rod (5) to rotate.

8. A laser cutting machine as claimed in claim 7, characterised in that: The two connecting plates (55) are fixedly provided with a plurality of anti-skid lines (56) on the side close to each other, and the anti-skid lines (56) are arranged in the vertical direction.

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