CN212267571U

CN212267571U - Bottom three-side occlusion one-side plug-in type assembled medical trolley

Info

Publication number: CN212267571U
Application number: CN202021852852.0U
Authority: CN
Inventors: 杨骏成
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-08-29
Filing date: 2020-08-29
Publication date: 2021-01-01
Anticipated expiration: 2030-08-29

Abstract

The utility model provides a trilateral interlock of bottom is plug-in type equipment type medical handcart on one side, which comprises a top plate, the left side board, the right side board, preceding face frame, backplate and bottom plate, left side board and right side board all use bayonet interlock structure cartridge between preceding face frame and backplate, preceding face frame, the left side board, there are arbitrary three for the interlock piece in right side board and the backplate, another is the insert, through side direction interlock structure fixed connection between the lower extreme of interlock piece and bottom plate, it is spacing to realize vertical direction through the plug-in card structure between the lower extreme of insert and the bottom plate, the top at the left side board is installed to the roof, the right side board, the top of preceding face frame and backplate. Use the utility model discloses need not to use a large amount of connecting parts to connect each part equipment, the packaging efficiency is high, and firm in connection, dismouting simple and convenient.

Description

Bottom three-side occlusion one-side plug-in type assembled medical trolley

The technical field is as follows:

the utility model relates to a medical handcart especially relates to a medical handcart of grafting components of a whole that can function independently assembled.

Background art:

the medical handcart is a necessary medical article storage and transportation device for medical care units such as hospitals and the like, is used for transporting articles such as medicines, medical instruments and the like, and must meet the use requirements of patients and medical staff.

At present, curb plate, backplate, roof, bottom plate, support column and drawer about current medical handcart is including controlling curb plate, backplate, roof, bottom plate, support column and drawer, and it is fixed all through the support column connection to control curb plate and backplate, and the roof passes through the upper and lower both ends of screw fixation at the support column with the bottom plate to form the frame structure of medical handcart, this kind of connection structure's medical handcart installation is complicated, and four support column installations must be accurate, otherwise can lead to the roof slope or control between curb plate and backplate and the door plant installation warpage scheduling problem. All be equipped with the tubular metal resonator at the center of four spinal branch daggers, the cost of tubular metal resonator is higher, and tubular metal resonator weight is heavier to make whole car weight heavier, increase the cost of transport and transportation. The existing medical trolley is difficult to install, has high requirements on the technical level of installers and long assembly time, and is difficult to adapt to the production requirements of large batch, low cost and saving. In order to overcome the defects of the conventional medical trolley, the applicant develops a three-side occluded plug-in split assembly type medical trolley, wherein all plates are connected through a splicing structure, so that the assembly and disassembly are convenient, and the industrial batch production is convenient.

The utility model has the following contents:

the utility model aims at providing a trilateral interlock in bottom plug-in type equipment type medical handcart on one side, connect through the special connection section bar between each board, trilateral and bottom plate interlock adopt this kind of connection structure, stable in connection is firm, the dismouting is simple and convenient, when selling, each part can be grouped and packed and shipped, the field assembly, whole car is the plastics formed part, no metal pipe fitting alleviates whole car weight greatly, can satisfy the production requirement that adapts to big batch, low cost, the province changes ideally, production and cost of transportation can be reduced by a wide margin.

The utility model adopts the following technical scheme:

the utility model provides a trilateral interlock of bottom is medical handcart of assembled type on one side, includes roof, left side board, right side board, front face frame, backplate and bottom plate, characterized by: the left side board and the right side board are inserted between the front face frame and the back board through an inserted occlusion structure, any three pieces of the front face frame, the left side board, the right side board and the back board are used as occlusion pieces, another piece is used as an insertion piece, the lower end of the occlusion piece is fixedly connected with the bottom board through a lateral occlusion structure, the lower end of the insertion piece is limited in the vertical direction through a card inserting structure, and the top board is installed on the top ends of the left side board, the right side board, the front face frame and the back board.

Further, the plug-in interlock structure between left side board or right side board and front face frame and the backplate is: the front side and the rear side on the left side plate and the right side plate are respectively provided with an insertion body, the two sides of the front face frame and the back plate are respectively provided with an insertion body, and the insertion bodies are mutually inserted, connected and meshed.

Further, the back plate is an insert, and the left side plate, the right side plate and the front face frame are occlusion pieces.

Further, left side board or right side board are the inserts, and right side board or left side board, front face frame and backplate are interlock spare, the left side board includes curb plate main part, guide rail installed part and the inserted body, and the fixed left and right sides that sets up at the curb plate main part of inserted body, guide rail installed part set up on the medial surface of curb plate main part, and the shape size of right side board is the same with the left side board.

Further, the front face frame is an insert, and the left side plate, the right side plate and the back plate are snap-in pieces.

Furthermore, the front face frame comprises a front face top plate, a front face side plate and a front face bottom plate, an inserting body is arranged on the front face side plate of the front face frame, a limiting clamping plate is arranged above the front face bottom plate, the front face side plate, the front face bottom plate and the limiting clamping plate are enclosed to form a clamping groove, the height of the clamping groove is matched with the height of the front side occlusion inserting body of the bottom plate, the front side inserting body of the bottom plate is clamped in the clamping groove, and a caster interface is arranged on the front face bottom plate; the front face side plate inner side of the front face frame is provided with a fixing groove, two connecting columns are arranged in the fixing groove at least at intervals, a threaded hole is formed in the center of each connecting column, an opening slot and a screw groove are formed in the inserting body, a through hole corresponding to the threaded hole in each connecting column is formed in the opposite side face of the opening slot of the inserting body, a fastening screw penetrates through the through hole to be fixedly screwed in the threaded hole of each connecting column, the inserting body is fixedly installed in the fixing groove, and the opening side of each opening slot is arranged outwards.

Furthermore, the front face frame comprises a front face side plate and a front face bottom plate, the front face side plate of the front face frame is provided with an insertion body, and the front face bottom plate is provided with a caster interface; the front face side plate inner side of the front face frame is provided with a fixing groove, at least two connecting columns are arranged in the fixing groove in a spaced mode, a threaded hole is formed in the center of each connecting column, an opening slot and a screw groove are formed in the inserting body, a through hole corresponding to the threaded hole in the connecting column is formed in the opposite side face of the opening slot of the inserting body, a fastening screw penetrates through the through hole to be fixedly screwed in the threaded hole of the connecting column, the inserting body is fixedly installed in the fixing groove, and the opening side of the opening slot is outwards arranged.

Furthermore, the left side plate comprises a side plate main body, a side plate top plate, guide rail mounting parts, an upper limiting clamping plate, a lower limiting clamping plate and an inserting body, wherein the side plate top plate is arranged at the top end of the side plate main body; the right side plate is the same as the left side plate in shape and size, and the right side face of the bottom plate is fixedly clamped in the clamping groove of the right side plate.

Still further, the backplate includes backplate main part and backplate bottom plate, is provided with the mounting groove at the left and right sides medial surface of backplate main part, is provided with two at least interval distribution's spliced pole in the mounting groove, opens threaded hole at the center of spliced pole, and fastening screw passes the fixed screw-on of through-hole and connects in the threaded hole of spliced pole, will insert body fixed mounting in the mounting groove, and the opening side of opening slot outwards sets up, is equipped with the truckle jack on the backplate bottom plate.

Further, the backplate includes the backplate main part, backplate bottom plate and back spacing cardboard, be provided with the mounting groove at the left and right sides medial surface of backplate main part, set up two interval distribution's spliced pole at least in the mounting groove, open threaded hole at the center of spliced pole, fastening screw passes the fixed screwed connection of through-hole in the threaded hole of spliced pole, will insert body fixed mounting in the mounting groove, the opening side of opening slot outwards sets up, back spacing cardboard sets up the top at the backplate bottom plate, the backplate main part, backplate bottom plate and back spacing cardboard enclose into the draw-in groove, the height of draw-in groove highly cooperatees with the trailing flank of bottom plate, the trailing flank fixed mounting of bottom plate is in the draw-in groove, be equipped with the truckle jack on the.

Because all plate bodies of this trilateral interlock grafting components of a whole that can function independently assembled medical handcart have all adopted connection profile or buckle structural connection between, the left side board, the right side board, there are three in front face frame and the backplate and pass through interlock structural connection with the bottom plate, one is the insert, need not to use a large amount of connecting elements to connect the equipment with each parts, and the installation of no support column, the roof slope or the installation warpage scheduling problem between left and right sides curb plate and backplate and the door plant that leads to because of the support column installation is inaccurate, the installation degree of difficulty of handcart has been simplified greatly, require lowly to installer's technical merit, the equipment time that significantly reduces, the packaging efficiency is improved. Arbitrary three boards lower extreme and the fixed interlock joint of bottom plate in left side board, right side board, front face frame and the backplate, another piece of board passes through the convex body and connects the fixed grafting of section bar, with the fixed synthetic automobile body that encloses of other three boards, the roof passes through buckle and bayonet socket fixed connection mode fixed mounting on the top of left side board, right side board, front face frame and backplate, connects through connecting section bar and fixed interlock between each board, stable in connection is firm, easy dismounting. Meanwhile, after any one plate body on the trolley is damaged, people can conveniently replace and maintain the trolley, and therefore the service life of the trolley is prolonged. Because all plate bodies of the trolley are injection-molded parts and are free of metal pipe fittings, the production cost is reduced, the weight of the trolley is greatly reduced, the transportation cost is reduced, and the defects of the conventional medical trolley are overcome.

Description of the drawings:

fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view A-A of FIG. 1;

FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1;

FIG. 4 is an enlarged view at C of FIG. 3;

FIG. 5 is a schematic view of the structure of the socket body;

fig. 6 is a schematic structural view of a front face frame in embodiment 1;

FIG. 7 is a perspective view of FIG. 6;

FIG. 8 is a schematic structural view of a left side plate in embodiment 1;

FIG. 9 is a schematic structural view of a back plate in example 1;

FIG. 10 is a perspective view of FIG. 9;

FIG. 11 is a schematic structural view of a base plate;

FIG. 12 is a perspective view of FIG. 11;

FIG. 13 is a schematic view showing the structure of a side panel in embodiments 2 to 4;

fig. 14 is a schematic structural view of a front face frame in embodiments 2 to 4;

FIG. 15 is a schematic structural view of a back sheet according to embodiments 2 to 4;

in the figure, 1-top plate; 2-left side plate; 3-right side plate; 4-front face frame; 5-a back plate; 6-a bottom plate; 7-an insert; 8-a intercalate; 9-a card slot; 10-fastening screws; 21-side plate body; 22-side plate top plate; 23-a rail mount; 24-upper limiting clamping plate; 25-lower limit snap-gauge; 41-front roof panel; 42-front face side panel; 43-front face floor; 44-a fixed groove; 45-connecting column; 46-a threaded hole; 47-a limit clamping plate; 48-a caster interface; 51-a back plate body; 52-backplane floor; 53-mounting grooves; 54-caster receptacle; 55-rear limiting clamping plate; 61-bite inserts; 81-open slot; 82-screw groove; 83-through hole.

The specific implementation mode is as follows:

the following describes the embodiments of the present invention with reference to the drawings:

example 1: the utility model provides a three side interlock in bottom is plug-in type equipment type medical handcart on one side, as shown in fig. 1-12, including roof 1, left side board 2, right side board 3, preceding face frame 4, backplate 5 and bottom plate 6, left side board 2 and right side board 3 all use bayonet interlock structure cartridge between preceding face frame 4 and backplate 5, preceding face frame 4, left side board 2, there are arbitrary three in right side board 3 and the backplate 5 to be the interlock piece, another is the inserter, through side direction interlock structure fixed connection between the lower extreme of interlock piece and bottom plate 6, realize vertical direction spacing through the plug-in card structure between the lower extreme of inserter and the bottom plate 6, roof 1 is installed on left side board 2, right side board 3, the top of preceding face frame 4 and backplate 5.

In this example, the back plate 5 is an insert, the left side plate 2, the right side plate 3 and the front face frame 4 are occlusion pieces, the left side plate 2 includes a side plate main body 21, a side plate top plate 22, a guide rail mounting piece 23, an upper limiting clamping plate 24, a lower limiting clamping plate 25 and an insert body 7, the side plate top plate 22 is arranged at the top end of the side plate main body 21, the guide rail mounting piece 23 is arranged on the inner side surface of the side plate main body 21, the insert body 7 is fixedly arranged at the left side and the right side of the side plate main body 21, the lower limiting clamping plate 25 is arranged at the bottom end of the inner side of the side plate main body 21, the upper limiting clamping plate 24 is arranged above the lower limiting clamping plate 25, the upper limiting clamping plate 24, the lower limiting clamping plate 25 and the side plate main body 21 enclose a clamping groove 9, the height of the clamping groove; the shape and size of the right side plate 3 are the same as those of the left side plate 2, and the right side surface of the bottom plate 6 is fixedly clamped in a clamping groove 9 of the right side plate 3; the front face frame 4 comprises a front face top plate 41, a front face side plate 42 and a front face bottom plate 43, an inserting body 8 is arranged on the front face side plate 42 of the front face frame 4, a limiting clamping plate 47 is arranged above the front face bottom plate 43, the front face side plate 42, the front face bottom plate 43 and the limiting clamping plate 47 are enclosed to form a clamping groove 9, the height of the clamping groove 9 is matched with the height of a front side surface occlusion inserting body 61 of the bottom plate 6, the front side surface occlusion inserting body 61 of the bottom plate 6 is clamped in the clamping groove 9, and a caster port 48 is arranged on the front face bottom plate 43; a fixing groove 44 is arranged on the inner side of a front face side plate 42 of the front face frame 4, at least two connecting columns 45 are arranged in the fixing groove 44 at intervals, a threaded hole 46 is formed in the center of each connecting column 45, an opening slot 81 and a screw groove 82 are formed in the inserting body 8, a through hole 83 corresponding to the threaded hole 46 in each connecting column 45 is formed in the opposite side face of the opening slot 81 of the inserting body 8, a fastening screw 10 penetrates through the through hole 83 to be fixedly screwed in the threaded hole 46 of each connecting column 45, the inserting body 8 is fixedly arranged in the fixing groove 44, and the opening side of the opening slot 81 is arranged outwards; the back plate 5 comprises a back plate main body 51 and a back plate bottom plate 52, mounting grooves 53 are formed in the inner side surfaces of the left side and the right side of the back plate main body 51, at least two connecting columns 45 which are distributed at intervals are arranged in the mounting grooves 53, threaded holes 46 are formed in the centers of the connecting columns 45, fastening screws 10 are fixedly screwed in the threaded holes 46 of the connecting columns 45 through holes 83, the inserting body 8 is fixedly mounted in the mounting grooves 53, the opening side of the opening slot 81 is outwards arranged, and caster jacks 54 are formed in the back plate bottom plate 52; the inserting bodies 7 on the front side and the rear side of the left side plate 2 and the right side plate 3 are mutually inserted and occluded with the inserting bodies 8 on the two sides of the front face frame 4 and the back plate 5.

Example 2: the difference from embodiment 1 is that the left side plate 2 is an insertion piece, and the right side plate 3, the front face frame 4 and the back plate 5 are an engagement piece, as shown in fig. 13, the left side plate 2 includes a side plate main body 21, a rail mounting piece 23 and an insertion body 7, the insertion body 7 is fixedly arranged at the left and right sides of the side plate main body 21, and the rail mounting piece 23 is arranged on the inner side surface of the side plate main body 21; as shown in fig. 14, the back plate 5 includes a back plate main body 51, a back plate bottom plate 52 and a rear limiting clamping plate 55, mounting grooves 53 are formed on inner sides of left and right sides of the back plate main body 51, at least two connecting posts 45 are arranged in the mounting grooves 53, a threaded hole 46 is formed in the center of each connecting post 45, a fastening screw 10 passes through a through hole 83 and is fixedly screwed in the threaded hole 46 of each connecting post 45, an insertion body 8 is fixedly mounted in the mounting grooves 53, the opening side of each opening slot 81 is outwardly arranged, the rear limiting clamping plate 55 is arranged above the back plate bottom plate 52, the back plate main body 51, the back plate bottom plate 52 and the rear limiting clamping plate 55 enclose a clamping groove 9, the height of the clamping groove 9 is matched with the height of the rear side surface of the bottom plate 6, the rear side surface of the bottom plate 6 is fixedly.

Example 3: the difference from embodiment 2 is that the right side plate 3 is an insertion piece, and the left side plate 2 is an engagement piece.

Example 4: the difference from embodiment 1 is that the front face frame 4 is an insert, and the left side plate 2, the right side plate 3, and the back plate 5 are an engaging piece, and as shown in fig. 15, the front face frame 4 includes a front face side plate 42 and a front face bottom plate 43, the front face side plate 42 of the front face frame 4 is provided with an engaging body 8, and the front face bottom plate 43 is provided with a caster port 48; the inside of the front face side plate 42 of the front face frame 4 is provided with a fixing groove 44, at least two connecting columns 45 which are distributed at intervals are arranged in the fixing groove 44, the center of each connecting column 45 is provided with a threaded hole 46, the inserting body 8 is provided with an opening slot 81 and a screw groove 82, the opposite side of the opening slot 81 of the inserting body 8 is provided with a through hole 83 corresponding to the threaded hole 46 on the connecting column 45, a fastening screw 10 penetrates through the through hole 83 to be fixedly screwed in the threaded hole 46 of the connecting column 45, the inserting body 8 is fixedly installed in the fixing groove 44, and the opening side of the opening slot 81 is arranged outwards.

In the drawings of the disclosed embodiments of the present invention, only the structures related to the disclosed embodiments are referred to, and other structures can refer to the common design, and under the condition of no conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

and finally: the above description is only for the preferred embodiment of the present invention and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. Trilateral interlock one side plug-in type assembled medical handcart in bottom, including roof (1), left side board (2), right side board (3), front face frame (4), backplate (5) and bottom plate (6), characterized by: left side board (2) and right side board (3) all use bayonet interlock structure cartridge between front face frame (4) and backplate (5), front face frame (4), left side board (2), there are arbitrary three in right side board (3) and backplate (5) to be the interlock spare, another is the insert, through side direction interlock structure fixed connection between the lower extreme of interlock spare and bottom plate (6), it is spacing to realize vertical direction through the plug-in card structure between the lower extreme of insert and bottom plate (6), install at left side board (2) roof (1), right side board (3), the top of front face frame (4) and backplate (5).

2. The bottom three-side occlusion one-side plug-in assembly medical cart of claim 1, wherein: the plug-in type occlusion structure between the left side plate (2) or the right side plate (3) and the front face frame (4) and the back plate (5) is as follows: the front side and the rear side of the left side plate (2) and the right side plate (3) are respectively provided with an insertion body (7), the two sides of the front face frame (4) and the back plate (5) are respectively provided with an insertion body (8), and the insertion bodies (7) and the insertion bodies (8) are mutually inserted and occluded.

3. The bottom three-side occlusion one-side plug-in assembly medical cart of claim 2, wherein: the back plate (5) is an insertion piece, and the left side plate (2), the right side plate (3) and the front face frame (4) are occlusion pieces.

4. The bottom three-side occlusion one-side plug-in assembly medical cart of claim 2, wherein: left side board (2) or right side board (3) are the inserts, and right side board (3) or left side board (2), front face frame (4) and backplate (5) are interlock spare, left side board (2) are including curb plate main part (21), guide rail installed part (23) and insert body (7), and the fixed left and right sides that sets up in curb plate main part (21) of insert body (7), and guide rail installed part (23) set up on the medial surface of curb plate main part (21), and the shape size of right side board (3) is the same with left side board (2).

5. The bottom three-side occlusion one-side plug-in assembly medical cart of claim 2, wherein: the front face frame (4) is an insertion piece, and the left side plate (2), the right side plate (3) and the back plate (5) are occlusion pieces.

6. The bottom three-side occlusion one-side plug-in type medical trolley according to claim 3 or 4, wherein: the front face frame (4) comprises a front face top plate (41), front face side plates (42) and a front face bottom plate (43), an insertion body (8) is arranged on the front face side plates (42) of the front face frame (4), a limiting clamping plate (47) is arranged above the front face bottom plate (43), the front face side plates (42), the front face bottom plate (43) and the limiting clamping plate (47) enclose a clamping groove (9), the height of the clamping groove (9) is matched with the height of a front side surface occlusion insertion body (61) of the bottom plate (6), the front side surface occlusion insertion body (61) of the bottom plate (6) is clamped in the clamping groove (9), and a caster interface (48) is arranged on the front face bottom plate (43); be provided with fixed slot (44) in front face curb plate (42) inboard of front face frame (4), set up two spliced poles (45) at least interval in fixed slot (44), open threaded hole (46) at the center of spliced pole (45), it has opening slot (81) and screw groove (82) to open on the body of inserting (8), open the opposite side of opening slot (81) of the body of inserting (8) has through-hole (83) corresponding with threaded hole (46) on spliced pole (45), fastening screw (10) pass through-hole (83) fixed spin in threaded hole (46) of spliced pole (45), body of inserting (8) fixed mounting will be in fixed slot (44), the opening side of opening slot (81) outwards sets up.

7. The bottom three-side occlusion one-side plug-in assembly medical cart of claim 5, wherein: the front face frame (4) comprises a front face side plate (42) and a front face bottom plate (43), the front face side plate (42) of the front face frame (4) is provided with an insertion body (8), and the front face bottom plate (43) is provided with a caster interface (48); be provided with fixed slot (44) in front face curb plate (42) inboard of front face frame (4), set up two interval distribution's spliced pole (45) at least in fixed slot (44), open threaded hole (46) at the center of spliced pole (45), it has opening slot (81) and screw groove (82) to open on the socket (8), open the opposite side of opening slot (81) of socket (8) have with spliced pole (45) on the corresponding through-hole (83) of threaded hole (46), fastening screw (10) pass through-hole (83) fixed turn-on in threaded hole (46) of spliced pole (45), to socket (8) fixed mounting in fixed slot (44), the opening side of opening slot (81) outwards sets up.

8. The bottom three-side occlusion one-side plug-in type medical trolley according to claim 3 or 5, wherein: the left side plate (2) comprises a side plate main body (21), a side plate top plate (22), a guide rail mounting piece (23), an upper limiting clamping plate (24), a lower limiting clamping plate (25) and an inserting body (7), the side plate top plate (22) is arranged at the top end of the side plate main body (21), the guide rail mounting piece (23) is arranged on the inner side face of the side plate main body (21), the inserting body (7) is fixedly arranged on the left side and the right side of the side plate main body (21), the lower limiting clamping plate (25) is arranged at the bottom end of the inner side of the side plate main body (21), the upper limiting clamping plate (24) is arranged above the lower limiting clamping plate (25), the upper limiting clamping plate (24), the lower limiting clamping plate (25) and the side plate main body (21) enclose a clamping groove (9), the height of the clamping groove (9) is matched with the height of the left side face of the bottom plate (6); the shape and size of the right side plate (3) are the same as those of the left side plate (2), and the right side surface of the bottom plate (6) is fixedly clamped in the clamping groove (9) of the right side plate (3).

9. The bottom three-side occlusion one-side plug-in modular medical cart of claim 3, wherein: backplate (5) are including backplate main part (51) and backplate bottom plate (52), both sides medial surface is provided with mounting groove (53) about backplate main part (51), be provided with spliced pole (45) of two at least interval distribution in mounting groove (53), open threaded hole (46) at the center of spliced pole (45), fastening screw (10) pass through-hole (83) fixed spin-on in threaded hole (46) of spliced pole (45), will insert body (8) fixed mounting in mounting groove (53), the opening side of opening slot (81) outwards sets up, be equipped with truckle jack (54) on backplate bottom plate (52).

10. The bottom three-side occlusion one-side plug-in type medical trolley according to claim 4 or 5, wherein: the back plate (5) comprises a back plate main body (51), a back plate bottom plate (52) and a rear limiting clamping plate (55), mounting grooves (53) are formed in the inner side faces of the left side and the right side of the back plate main body (51), at least two connecting columns (45) distributed at intervals are arranged in the mounting grooves (53), a threaded hole (46) is formed in the center of each connecting column (45), a fastening screw (10) penetrates through a through hole (83) to be fixedly screwed in the threaded hole (46) of each connecting column (45), an inserting body (8) is fixedly mounted in each mounting groove (53), the opening side of each opening slot (81) is outwards arranged, the rear limiting clamping plate (55) is arranged above the back plate bottom plate (52), the back plate main body (51), the back plate bottom plate (52) and the rear limiting clamping plate (55) are enclosed to form a clamping groove (9), the height of each clamping groove (9) is matched with the height of the rear side face of the bottom plate (6), and the, a caster jack (54) is provided on the back plate base plate (52).