CN216824554U

CN216824554U - High altitude construction anti-falling device for hydraulic building engineering

Info

Publication number: CN216824554U
Application number: CN202220434863.XU
Authority: CN
Inventors: 佟刚; 何淼; 杨春雨; 岳彪; 张珊珊
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-03-02
Filing date: 2022-03-02
Publication date: 2022-06-28
Anticipated expiration: 2032-03-02

Abstract

The utility model discloses a high-altitude operation anti-falling device for hydraulic construction engineering, which comprises a seat plate, the four corners of the upper surface of the seat plate are fixedly connected with steel wire ropes, the left side and the right side of the lower surface of the seat plate are fixedly connected with two installation seats, an adjusting plate is arranged between the two installation seats, a long hole is arranged in the middle of the adjusting plate, a movable box is connected in the long hole in a sliding way, a baffle is fixedly connected on the upper surface of the movable box, the front side and the rear side of the lower surface of the movable box are both fixedly connected with fixed plates, a rotating shaft is arranged between the two fixed plates, two ends of the rotating shaft are rotatably connected with the two fixed plates through bearings, a safety rope is wound on the rotating shaft, the top end of the safety rope is fixedly connected with the rotating shaft, and the bottom fixedly connected with couple of safety rope, the positive fixedly connected with dwang of pivot. A high altitude construction anti-falling device for hydraulic building engineering, can fix the position of bucket.

Description

High altitude construction anti-falling device for hydraulic building engineering

Technical Field

The utility model relates to a hydraulic engineering field, in particular to high altitude construction anti-falling device field for hydraulic building engineering.

Background

Still there can be supporting housing construction in hydroelectric power station construction process, when carrying out the washing of mopping or glass to housing construction's outer wall among the prior art, what adopt usually is the seat board that hangs through wire rope, make constructor sit on the seat board and the constructor waist is tied the one end that has the safety belt, the other end of safety belt is on wire rope, thereby protect constructor, simultaneously because constructor need use some construction tools when the construction operation, and what construction tool deposited often adopted is that the bucket hangs in the below of seat board, but above-mentioned mode still has some defects:

different constructors' height is different and some constructors are left-handed, it is different to lead to different constructors to be accustomed to when bowing the instrument of taking the bucket the inside, need be under construction to different places in the work progress simultaneously, it will go out through the health to get to put the thing, fall easily on the leg or ground, however take the bucket of putting the instrument among the prior art and hang on the seat board through the rope, the bucket lacks spacing device, the position of bucket is unable fixed, the condition that the rocking that leads to the position of bucket in the work progress can follow the seat board appears removing, thereby can lead to certain influence to the constructor.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main aim at provides a high altitude construction anti-falling device for hydraulic construction engineering can effectively solve the problem in the background art.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a high-altitude operation anti-falling device for hydraulic construction engineering comprises a seat plate, wherein steel wire ropes are fixedly connected at four corners of the upper surface of the seat plate, two installation seats are fixedly connected at the left side and the right side of the lower surface of the seat plate, an adjusting plate is arranged between the two installation seats, a long hole is formed in the middle of the adjusting plate, a movable box is connected in the long hole in a sliding manner, a baffle is fixedly connected to the upper surface of the movable box, fixed plates are fixedly connected to the front side and the rear side of the lower surface of the movable box, a rotating shaft is arranged between the two fixed plates, two ends of the rotating shaft are rotatably connected with the two fixed plates through bearings, a safety rope is wound on the rotating shaft, the top end of the safety rope is fixedly connected with the rotating shaft, a hook is fixedly connected to the bottom end of the safety rope, a rotating rod is fixedly connected to the front side of the rotating shaft, and a disc is fixedly connected to one end of the rotating rod, which is far away from the rotating shaft, the positive fixedly connected with handle of disc, two slide bars of fixedly connected with between the both sides inner wall around the movable box, both ends cover is equipped with two movable rods around the slide bar surface, one side fixedly connected with depression bar of movable rod, the one end that the movable rod was kept away from to the depression bar runs through the movable box, the top of movable rod and the inner wall joint of slot hole, the surface of slide bar just is located and is equipped with first spring between the inner wall of movable rod and movable box by the cover.

The utility model discloses a further improvement lies in, the equal fixedly connected with locating piece in both sides around the baffle lower surface, the constant head tank with locating piece looks adaptation is seted up to the upper surface of regulating plate, sets up like this and is favorable to fixing a position the baffle, the movable box of being convenient for and the fixed of regulating plate.

The utility model discloses a further improvement lies in, the top fixedly connected with fixture block of movable rod, the draw-in groove with fixture block looks adaptation is all seted up to both sides inner wall around the slot hole, sets up like this and makes the movable box can fix in the different positions of regulating plate.

The utility model discloses a further improvement lies in, the one end fixedly connected with button of movable rod is kept away from to the depression bar, the button is spherical structure, sets up like this and is convenient for the operator to press the button and drive the depression bar removal.

The utility model discloses a further improvement lies in, the through-hole has been seted up on the mount pad, two guide bars of interior diapire fixedly connected with of through-hole, the top of guide bar run through the regulating plate and with the interior roof fixed connection of through-hole, guide bar and regulating plate sliding connection, the surface cover of guide bar is equipped with the second spring, sets up like this that the staff falls the time and can make the regulating plate gliding downwards on the guide bar through couple and safety rope, and the regulating plate can compress the second spring at gliding in-process, cushions the staff through second spring elastic deformation.

The utility model discloses a further improvement lies in, a plurality of montants of the equal fixedly connected with in both sides around the regulating plate upper surface, the lower fixed surface of seat board is connected with and the corresponding movable section of thick bamboo of montant, the top of montant is located the inside and the fixedly connected with stopper of a movable section of thick bamboo, the surface cover that the montant is located a movable section of thick bamboo inside is equipped with the third spring, sets up the regulating plate like this and can drive the montant and remove at gliding in-process, and the montant can drive the stopper and slide and compress the third spring in a movable section of thick bamboo at the in-process that removes to elastic deformation through the third spring cushions the staff.

The utility model discloses further improvement lies in, threaded connection has fastening screw on the disc, a plurality of screw holes all with fastening screw looks adaptation are seted up in the front of the fixed plate of activity case lower surface front side, through the cooperation of fastening screw and screw hole, can fix the position of disc when the disc does not need to rotate.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the waist of a constructor is tied with one end of a safety belt, the other end of the safety belt is tied on a steel wire rope, the constructor can be protected when sitting on a seat plate, a barrel is hung on a hook, the constructor adjusts the position of the barrel according to own habits, a press rod is driven to move by pressing buttons on the front side and the rear side, the press rod can drive a movable rod to slide on a slide rod and stretch a first spring in the moving process, the movable rod can drive a clamping block to be separated from a clamping groove in the sliding process, then the movable box is moved upwards to separate a positioning block on a baffle from a positioning groove until the movable box moves to the position convenient for the constructor to take tools in the barrel along the adjusting plate, the clamping block can correspond to the position of the clamping groove and the positioning block corresponds to the position of the positioning groove, at the moment, the movable box is fixed with the adjusting plate by the restoring force of the first spring by loosening the press button, thereby adjust the mounted position of bucket, simultaneously can be with the rigidity of bucket, through screwing out fastening screw from the screwed hole, then through handle clockwise rotation disc, the disc can drive rather than fixed connection's dwang rotation at the rotation in-process, the dwang can drive rather than fixed connection's pivot rotation at the rotation in-process, the pivot can drive safety rope and bucket rebound at the rotation in-process, can make safety rope and bucket rebound when passing through handle anticlockwise rotation disc in the same way, when the bucket removes to the height that makes things convenient for constructor to take the instrument, fastening screw's position corresponds with the position of screw hole, can carry out spacingly to the disc with the inside of fastening screw in screw hole, thereby can prevent the disc, dwang and pivot are rotated, and then can fix the height of bucket.

2. Can make safety rope and bucket downstream when rotating the disc through the handle anticlockwise, the bucket can fall fast because self action of gravity down when the disc anticlockwise rotates, the bucket can drive movable box downstream when falling fast, can make the regulating plate lapse on the guide bar when the movable box moves down, the regulating plate can drive the montant at gliding in-process and remove and compress the second spring, the montant can drive the stopper and slide and compress the third spring in a movable section of thick bamboo at the in-process that removes, thereby cushion when descending fast the bucket through the elastic deformation of second spring and third spring.

Drawings

Fig. 1 is the utility model relates to a hydraulic construction engineering is with high altitude construction anti-falling device's overall structure schematic diagram.

Fig. 2 is the utility model discloses a hydraulic construction engineering is with high altitude construction anti-falling device's elevation structure schematic diagram.

Fig. 3 is the utility model discloses a mounting structure schematic diagram of high altitude construction anti-falling device's movable box for hydraulic construction engineering.

Fig. 4 is the utility model relates to a hydraulic construction engineering is with high altitude construction anti-falling device's regulating plate's structural schematic.

Fig. 5 is the mounting structure schematic diagram of the utility model relates to a montant and a movable cylinder of high altitude construction anti-falling device for hydraulic construction engineering.

Fig. 6 is an enlarged schematic view of a structure at a position a in fig. 4 of the aloft work anti-falling device for hydraulic construction engineering of the present invention.

In the figure: 1. a seat plate; 2. a wire rope; 3. a mounting seat; 4. an adjusting plate; 5. a long hole; 6. a movable box; 7. a baffle plate; 8. a safety cord; 9. hooking; 10. a slide bar; 11. a movable rod; 12. a pressure lever; 13. a first spring; 701. positioning blocks; 702. positioning a groove; 1101. a clamping block; 1102. a card slot; 1201. a button; 14. a through hole; 15. a guide bar; 16. a second spring; 17. a vertical rod; 18. a movable barrel; 19. a limiting block; 20. a third spring; 21. a fixing plate; 22. a rotating shaft; 23. a disc; 24. a handle; 25. fastening a screw rod; 26. a threaded hole.

Detailed Description

In order to make the technical means, the creative features, the achievement purposes and the functions of the present invention easy to understand, in the description of the present invention, it is to be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or the positional relationship based on the orientation or the positional relationship shown in the drawings, only for the convenience of describing the present invention and simplifying the description, but not for indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, cannot be understood as limiting the present invention. Furthermore, the terms "a," "an," "two," and "three" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The present invention will be further described with reference to the following detailed description.

Example 1

As shown in fig. 1-6, an aerial work falling prevention device for hydraulic construction engineering comprises a seat plate 1, wherein four corners of the upper surface of the seat plate 1 are fixedly connected with a steel wire rope 2, the left side and the right side of the lower surface of the seat plate 1 are fixedly connected with two installation seats 3, an adjustment plate 4 is arranged between the two installation seats 3, the middle part of the adjustment plate 4 is provided with a long hole 5, the long hole 5 is connected with a movable box 6 in a sliding manner, the upper surface of the movable box 6 is fixedly connected with a baffle 7, the front side and the rear side of the lower surface of the movable box 6 are fixedly connected with fixed plates 21, a rotating shaft 22 is arranged between the two fixed plates 21, two ends of the rotating shaft 22 are rotatably connected with the two fixed plates 21 through bearings, a safety rope 8 is wound on the rotating shaft 22, the top end of the safety rope 8 is fixedly connected with the rotating shaft 22, a hook 9 is fixedly connected with the bottom end of the safety rope 8, and a rotating rod is fixedly connected with the front side of the rotating shaft 22, the one end fixedly connected with disc 23 of pivot 22 is kept away from to the dwang, the positive fixedly connected with handle 24 of disc 23, two slide bars 10 of fixedly connected with between the both sides inner wall around the activity case 6, both ends cover is equipped with two movable rod 11 around the slide bar 10 surface, one side fixedly connected with depression bar 12 of movable rod 11, the one end that movable rod 11 was kept away from to depression bar 12 runs through activity case 6, the top of movable rod 11 and slot hole 5's inner wall joint, the cover is equipped with first spring 13 between the surface of slide bar 10 and the inner wall that is located movable rod 11 and activity case 6, threaded connection has fastening screw 25 on the disc 23, a plurality of screw holes 26 all with fastening screw 25 looks adaptation are seted up in the front of the fixed plate 21 of surface front side under activity case 6.

The embodiment can realize that: the waist of a constructor is tied with one end of a safety belt, the other end of the safety belt is tied on a steel wire rope 2, when the constructor sits on the seat plate 1, the constructor can be protected, the barrel is hung on the hook 9, the constructor adjusts the position of the barrel according to own habits, the press rod 12 is driven to move by pressing the buttons 1201 on the front side and the rear side, the press rod 12 can drive the movable rod 11 to slide on the slide rod 10 and stretch the first spring 13 in the moving process, the movable rod 11 can drive the clamping block 1101 to be separated from the clamping groove 1102 in the sliding process, then the movable box 6 is moved upwards to enable the positioning block 701 on the baffle plate 7 to be separated from the positioning groove 702 until the positioning block 1101 corresponds to the clamping groove 1102 and the positioning block 701 corresponds to the positioning groove 702 when the positioning block 701 moves to the position which is convenient for the constructor to take tools in the barrel along the adjusting plate 4, at the moment, the loosening button 1201 fixes the movable box 6 and the adjusting plate 4 through the restoring force of the first spring 13, so as to adjust the installation position of the barrel, and simultaneously fix the position of the barrel, the fastening screw 25 is unscrewed from the threaded hole 26, then the disc 23 is rotated clockwise through the handle 24, the disc 23 can drive the rotating rod fixedly connected with the disc to rotate in the rotating process, the rotating rod can drive the rotating shaft 22 fixedly connected with the rotating rod to rotate in the rotating process, the rotating shaft 22 can drive the safety rope 8 and the barrel to move upwards in the rotating process, similarly, the safety rope 8 and the barrel can move downwards when the disc 23 is rotated anticlockwise through the handle 24, when the barrel moves to the height convenient for a constructor to take tools, the position of the fastening screw 25 corresponds to the position of the threaded hole 26, and the disc 23 can be limited when the fastening screw 25 is screwed into the threaded hole 26, so that the rotation of the disc 23, the rotation lever and the rotation shaft 22 can be prevented, and thus the height of the tub can be fixed.

Example 2

As shown in fig. 1-6, an aerial work falling prevention device for hydraulic construction engineering comprises a seat plate 1, wherein four corners of the upper surface of the seat plate 1 are fixedly connected with a steel wire rope 2, the left side and the right side of the lower surface of the seat plate 1 are fixedly connected with two installation seats 3, an adjustment plate 4 is arranged between the two installation seats 3, the middle part of the adjustment plate 4 is provided with a long hole 5, the long hole 5 is connected with a movable box 6 in a sliding manner, the upper surface of the movable box 6 is fixedly connected with a baffle 7, the front side and the rear side of the lower surface of the movable box 6 are fixedly connected with fixed plates 21, a rotating shaft 22 is arranged between the two fixed plates 21, two ends of the rotating shaft 22 are rotatably connected with the two fixed plates 21 through bearings, a safety rope 8 is wound on the rotating shaft 22, the top end of the safety rope 8 is fixedly connected with the rotating shaft 22, a hook 9 is fixedly connected with the bottom end of the safety rope 8, and a rotating rod is fixedly connected with the front side of the rotating shaft 22, a disc 23 is fixedly connected to one end of the rotating rod far away from the rotating shaft 22, a handle 24 is fixedly connected to the front side of the disc 23, two sliding rods 10 are fixedly connected between the inner walls of the front side and the rear side of the movable box 6, two movable rods 11 are sleeved on the front end and the rear end of the outer surface of each sliding rod 10, a pressure rod 12 is fixedly connected to one side of each movable rod 11, one end of each pressure rod 12 far away from each movable rod 11 penetrates through the movable box 6, the top end of each movable rod 11 is clamped with the inner wall of the corresponding long hole 5, a first spring 13 is sleeved on the outer surface of each sliding rod 10 and between each movable rod 11 and the inner wall of the corresponding movable box 6, positioning blocks 701 are fixedly connected to the front side and the rear side of the lower surface of the baffle 7, a positioning groove 702 matched with the positioning block 701 is formed in the upper surface of the adjusting plate 4, a clamping block 1101 is fixedly connected to the top end of each movable rod 11, clamping grooves 1102 matched with the clamping blocks 1201 are formed in the inner walls of the front side and the rear side of the corresponding long holes 5, and a button is fixedly connected to one end of each pressure rod 12 far away from the corresponding movable rod 11, button 1201 is spherical structure, through-hole 14 has been seted up on mount pad 3, two guide bar 15 of inner diapire fixedly connected with of through-hole 14, the top of guide bar 15 run through regulating plate 4 and with the interior roof fixed connection of through-hole 14, guide bar 15 and regulating plate 4 sliding connection, the surface cover of guide bar 15 is equipped with second spring 16, the equal a plurality of montants 17 of fixedly connected with in both sides around the regulating plate 4 upper surface, the lower fixed surface of seat board 1 is connected with the activity section of thick bamboo 18 corresponding with montant 17, the top of montant 17 is located the inside and the fixedly connected with stopper 19 of activity section of thick bamboo 18, the surface cover that montant 17 is located activity section of thick bamboo 18 inside is equipped with third spring 20, threaded connection has fastening screw 25 on the disc 23, the front of the fixed plate 21 of activity case 6 lower surface front side is seted up a plurality of all with fastening screw hole 26 of fastening screw 25 looks adaptation.

The embodiment can realize that: can make safety rope 8 and bucket downstream when rotating disc 23 anticlockwise through handle 24, the bucket can fall fast under the self action of gravity when disc 23 anticlockwise rotates, the bucket can drive movable box 6 downstream when falling fast, can make regulating plate 4 slide down on guide bar 15 when movable box 6 downstream, regulating plate 4 can drive montant 17 and remove and compress second spring 16 at gliding in-process, montant 17 can drive stopper 19 and slide and compress third spring 20 in a movable section of thick bamboo 18 at the in-process that removes, thereby cushion when descending fast to the bucket through the elastic deformation of second spring 16 and third spring 20.

It should be noted that the utility model relates to a falling-preventing device for high altitude construction for hydraulic construction engineering, the waist of the constructor is tied with one end of a safety belt, the other end of the safety belt is tied on a steel wire rope 2, when the constructor sits on a seat plate 1, the constructor can protect the constructor, hang the barrel on a hook 9, the constructor can adjust the position of the barrel according to the habit, the press rod 12 is driven to move by pressing the buttons 1201 on the front side and the rear side, the press rod 12 can drive the movable rod 11 to slide on the slide rod 10 and stretch the first spring 13 in the moving process, the movable rod 11 can drive the fixture block 1101 to separate from the fixture groove 1102 in the sliding process, then the movable box 6 is moved upwards to separate the positioning block 701 on the baffle 7 from the positioning groove 702, until the positioning block 1101 corresponds to the positioning groove 1102 position when the movable box moves to the position convenient for the constructor to take tools in the barrel along the adjusting plate 4, at the moment, the loosening button 1201 fixes the movable box 6 and the adjusting plate 4 through the restoring force of the first spring 13, so as to adjust the installation position of the barrel, and simultaneously fix the position of the barrel, the fastening screw 25 is unscrewed from the threaded hole 26, then the disc 23 is rotated clockwise through the handle 24, the disc 23 can drive the rotating rod fixedly connected with the disc to rotate in the rotating process, the rotating rod can drive the rotating shaft 22 fixedly connected with the rotating rod to rotate in the rotating process, the rotating shaft 22 can drive the safety rope 8 and the barrel to move upwards in the rotating process, similarly, the safety rope 8 and the barrel can move downwards when the disc 23 is rotated anticlockwise through the handle 24, when the barrel moves to the height convenient for a constructor to take tools, the position of the fastening screw 25 corresponds to the position of the threaded hole 26, and the disc 23 can be limited when the fastening screw 25 is screwed into the threaded hole 26, thereby can prevent disc 23, dwang and pivot 22 rotate, and then can fix the height of bucket, can make safety rope 8 and bucket downstream when rotating disc 23 anticlockwise through handle 24, the bucket can fall fast under the effect of self gravity when disc 23 anticlockwise rotates, the bucket can drive movable box 6 downstream when falling fast, can make regulating plate 4 slide down on guide bar 15 when movable box 6 moves down, regulating plate 4 can drive montant 17 and remove and compress second spring 16 at gliding in-process, montant 17 can drive stopper 19 and slide and compress third spring 20 in movable tube 18 at the in-process that removes, thereby cushion when descending fast the bucket through the elastic deformation of second spring 16 and third spring 20.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a high altitude construction anti-falling device for hydraulic construction engineering, includes seat board (1), its characterized in that: the steel wire rope (2) is fixedly connected to four corners of the upper surface of the seat plate (1), two installation seats (3) are fixedly connected to the left side and the right side of the lower surface of the seat plate (1), an adjusting plate (4) is arranged between the two installation seats (3), a long hole (5) is formed in the middle of the adjusting plate (4), a movable box (6) is connected to the long hole (5) in a sliding mode, a baffle (7) is fixedly connected to the upper surface of the movable box (6), fixing plates (21) are fixedly connected to the front side and the rear side of the lower surface of the movable box (6), a rotating shaft (22) is arranged between the two fixing plates (21), two ends of the rotating shaft (22) are rotatably connected with the two fixing plates (21) through bearings, a safety rope (8) is wound on the rotating shaft (22), and the top end of the safety rope (8) is fixedly connected with the rotating shaft (22), the bottom end of the safety rope (8) is fixedly connected with a hook (9), the front surface of the rotating shaft (22) is fixedly connected with a rotating rod, a disc (23) is fixedly connected at one end of the rotating rod far away from the rotating shaft (22), a handle (24) is fixedly connected on the front surface of the disc (23), two sliding rods (10) are fixedly connected between the inner walls of the front side and the rear side of the movable box (6), two movable rods (11) are sleeved at the front end and the rear end of the outer surface of the sliding rod (10), one side of the movable rod (11) is fixedly connected with a pressure lever (12), one end of the pressure lever (12) far away from the movable rod (11) penetrates through the movable box (6), the top of movable rod (11) and the inner wall joint of slot hole (5), the surface of slide bar (10) just is located and is equipped with first spring (13) between the inner wall of movable rod (11) and activity case (6).

2. The aloft work falling prevention device for the water conservancy building engineering as claimed in claim 1, wherein: the equal fixedly connected with locating piece (701) in both sides around baffle (7) lower surface, constant head tank (702) with locating piece (701) looks adaptation is seted up to the upper surface of regulating plate (4).

3. The aloft work fall preventing device for the hydraulic building engineering according to claim 1, characterized in that: the top end of the movable rod (11) is fixedly connected with a clamping block (1101), and clamping grooves (1102) matched with the clamping block (1101) are formed in the inner walls of the front side and the rear side of the long hole (5).

4. The aloft work fall preventing device for the hydraulic building engineering according to claim 1, characterized in that: one end of the pressure lever (12) far away from the movable rod (11) is fixedly connected with a button (1201), and the button (1201) is of a spherical structure.

5. The aloft work fall preventing device for the hydraulic building engineering according to claim 1, characterized in that: seted up through-hole (14) on mount pad (3), two guide bar (15) of interior diapire fixedly connected with of through-hole (14), regulating plate (4) are run through on the top of guide bar (15) and with the interior roof fixed connection of through-hole (14), guide bar (15) and regulating plate (4) sliding connection, the surface cover of guide bar (15) is equipped with second spring (16).

6. The aloft work fall preventing device for the hydraulic building engineering according to claim 1, characterized in that: the adjustable seat is characterized in that a plurality of vertical rods (17) are fixedly connected to the front side and the rear side of the upper surface of the adjusting plate (4), movable cylinders (18) corresponding to the vertical rods (17) are fixedly connected to the lower surface of the seat plate (1), the top ends of the vertical rods (17) are located inside the movable cylinders (18) and fixedly connected with limiting blocks (19), and third springs (20) are sleeved on the outer surfaces of the vertical rods (17) located inside the movable cylinders (18).

7. The aloft work fall preventing device for the hydraulic building engineering according to claim 1, characterized in that: the disc (23) is connected with a fastening screw (25) in a threaded manner, and a plurality of threaded holes (26) matched with the fastening screw (25) are formed in the front face of the fixing plate (21) fixed on the front side of the lower surface of the movable box (6).