CN211224990U

CN211224990U - Outer transport mechanism of safe deposit box

Info

Publication number: CN211224990U
Application number: CN201921939734.0U
Authority: CN
Inventors: 王云辉; 张白祥; 姜朋伟; 石豪男; 孔方方
Original assignee: Luoyang Steelite Steel Cabinet Co ltd
Current assignee: Luoyang Steelite Steel Cabinet Co ltd
Priority date: 2019-11-12
Filing date: 2019-11-12
Publication date: 2020-08-11
Anticipated expiration: 2029-11-12

Abstract

An outer conveying mechanism of a safe deposit box relates to a conveying mechanism, which comprises a frame, a horizontal conveying mechanism and a door opening mechanism, wherein the horizontal conveying mechanism is horizontally arranged in the middle of the frame, the door opening mechanism is arranged on the frame, a lifting mechanism for lifting and descending the horizontal conveying mechanism is arranged at the rear part of the frame, the horizontal conveying mechanism comprises a conveying frame, a drag hook assembly, a conveying motor, a fixing piece and a synchronizing wheel C, a slot is formed in the middle of the conveying frame along the length direction, a draw hook component is fixed in the slot, a slide rail B is fixed on one side of the slot along the length direction, one side of the draw hook component is fixedly connected with a slide block on the slide rail B through an extension part at the front end of a fixing part, a transmission motor is arranged outside one end of a transmission frame, the synchronous wheel D on the output shaft is connected with a synchronous wheel C at the lower part of the other end of the conveying frame through a synchronous belt D, and the synchronous belt D is positioned on the inner side of the sliding rail B; the utility model discloses a full automatization operation has improved work efficiency greatly.

Description

Outer transport mechanism of safe deposit box

Technical Field

The utility model relates to an outer transport mechanism especially relates to an outer transport mechanism of safe box.

Background

As is known, a safe deposit box is a place, such as a bank or a hotel, which is specially used by a customer and has the same safe deposit as a vault, at present, more and more people tend to deposit valuables into the vault of the bank, the bank provides the safe deposit box with a lock with a fixed volume for the customer, the customer places the articles to be deposited backwards and then stores the safe deposit box in the vault by the bank, because the safe requirement of the vault is very high, the manufacturing cost is also very high, the space cost inside the vault is very high, and in order to effectively improve the space utilization rate of the vault, the safe deposit box is generally placed on a three-dimensional shelf with a compact structure. However, when the safe box is taken out, since the space is small and the worker is not easy to get in and out of the safe box, an external transfer mechanism for automatically delivering the safe box to the worker is proposed, which is a basic appeal of those skilled in the art.

Disclosure of Invention

In order to overcome the deficiencies in the background art, the utility model discloses an outer transport mechanism of safe box.

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

an outer conveying mechanism of a safe deposit box comprises a frame, a horizontal conveying mechanism and a door opening mechanism, wherein the horizontal conveying mechanism is horizontally arranged in the middle of the frame, the door opening mechanism is arranged on the frame, a lifting mechanism for lifting and descending the horizontal conveying mechanism is arranged at the rear part of the frame, the horizontal conveying mechanism comprises a conveying frame, a drag hook assembly, a conveying motor, a fixing part and a synchronous wheel C, a slot is formed in the middle of the conveying frame along the length direction, the drag hook assembly is fixed in the slot, a sliding rail B is fixed on one side of the slot along the length direction, one side of the drag hook assembly is fixedly connected with a sliding block on the sliding rail B through an extending part at the front end of the fixing part, the conveying motor is arranged outside one end of the conveying frame, and is connected with the synchronous wheel C at the lower part of the other end of the conveying frame through a synchronous belt, the mounting includes upper plate and hypoplastron, and the upper plate setting is on hold-in range D, and the hypoplastron setting is below hold-in range D, and tooth joint on the tooth on the hypoplastron and the hold-in range D, and upper plate and hypoplastron pass through screw fixed connection, are equipped with L shape slide A, slide B respectively in the both sides above the frame, are equipped with the safe deposit box on slide A, slide B, and the hangers of drag hook subassembly and safe deposit box bottom articulates.

The outer transport mechanism of safe deposit case, the drag hook subassembly includes the fixing base, the drag hook motor, location light eye A and the drag hook body of rod, set up the outside at the fixing base after the one end of the drag hook body of rod passes the bearing in the fixing base, and the gear of drag hook body of rod tip meshes with the gear on the drag hook motor mutually, there is the dustcoat at the external connection of fixing base and drag hook motor, the other end external connection of the drag hook body of rod has the draw hook plate, the draw hook plate articulates with the hangers of safe deposit case bottom, both sides at the drag hook body of rod all are equipped with location light eye A, be equipped with the card on the middle part outer fringe face of the drag hook body of rod, the card sets up in the recess of arbitrary location light eye.

The outer conveying mechanism of the safe deposit box comprises two door plates, mounting frames, slide rails A, transmission shafts and motors, wherein the two mounting frames are respectively arranged at two inner sides of the upper end of a frame, the slide rails A are fixed on the mounting frames, the rear parts of two ends of the two mounting frames are respectively fixed with bearing seats, the transmission shafts are penetrated in the two bearing seats, two ends of each transmission shaft are respectively arranged outside the bearing seats and are connected with a synchronizing wheel A, C-shaped outer cover bodies are respectively fixed at the front parts of two ends of the two mounting frames, the synchronizing wheels B which are rotatably connected are arranged in the outer cover bodies, a synchronizing belt B is connected between the synchronizing wheel A and the synchronizing wheel B at the same side, the outer ends of the transmission shafts are connected with the motors, the two door plates are arranged, extension plates at two ends of one door plate are respectively fixed with slide blocks on the two slide rails A, and one, the connecting plate is arranged above the upper sections of the two synchronous belts B, the fixing plates connected through screws are arranged below the connecting plate, and teeth on the inner surfaces of the fixing plates are clamped with teeth on the synchronous belts B; the two ends of the other door plate are respectively fixed with the sliding blocks on the two sliding rails A, L-shaped pressing plates are arranged on the two end faces, the pressing plates are arranged on the lower sections of the two synchronous belts B, fixing plates connected through screws are arranged below the pressing plates, and teeth on the inner faces of the pressing plates are clamped with teeth on the synchronous belts B.

The outer conveying mechanism of the safe deposit box comprises a square frame, support columns, U-shaped supports and a bottom plate, wherein one corner of the lower part of the square frame is provided with a vertical support fixed with the bottom plate, the middle part of the rear part of the square frame is provided with vertical stand columns at intervals and fixedly connected with the bottom plate, a cross rod is arranged between the lower parts of the two stand columns, and a lifting mechanism is arranged on the cross rod; the lower part of the square frame is provided with a U-shaped support which is arranged in parallel with the square frame up and down, a support column is arranged between the square frame and the U-shaped support, the open end of one side of the U-shaped support is fixed at the middle part of the vertical support, the open end of the other side of the U-shaped support is fixed with the middle part of the upright post through a transverse short plate, and the lower parts of two sides of the U-shaped support are respectively provided with a vertical support and a bottom.

The outer conveying mechanism of the safe deposit box comprises a lifting mechanism, a synchronous motor, a supporting seat and a synchronous belt C, sliding seats fixedly connected with the side surfaces of the conveying frames are respectively arranged on the guide rails, a synchronous motor fixed through a fixed seat is arranged on the cross rod, an upper cross rod is connected between the upper ends of the two upright posts, an inverted U-shaped supporting seat is arranged at the lower part of the upper cross bar, an upper synchronizing wheel is rotationally connected in the supporting seat, a lower synchronizing wheel is arranged on an output shaft of the synchronizing motor, be connected with hold-in range C between last synchronizing wheel and the lower synchronizing wheel, the lower part of conveying frame is equipped with the extension seat that extends to hold-in range C direction, and the outside setting that extends the seat is in hold-in range C's inner face, and the outside that extends the seat is equipped with the fixed plate through the screw connection, is equipped with the internal tooth with hold-in range C outer face tooth joint on the inner face of fixed plate.

The outer conveying mechanism of the safe deposit box is provided with a positioning light eye B on the upper part of the slideway A.

The outer conveying mechanism of the safe deposit box is provided with a positioning switch outside the mounting rack.

The outer conveying mechanism of the safe deposit box is characterized in that four corners of the lower portion of the bottom plate are provided with leveling angles, and two sides of the lower portion of the bottom plate are provided with universal casters.

Since the technical scheme is used, the utility model discloses following beneficial effect has:

outer transport mechanism of safe box, drive horizontal transport mechanism through elevating system and rise or descend, the safe box passes through the drag hook subassembly and moves on the horizontal direction, the motor drives the transmission shaft and rotates, makes the action that opens and shuts of two last door plants of two hold-in range B, the staff of being convenient for takes out the safe box, the utility model discloses simple structure, convenient to use have realized full automatization operation, have improved work efficiency greatly.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a schematic structural view of the horizontal transfer mechanism of the present invention;

fig. 3 is a schematic structural view of the door opening mechanism of the present invention;

fig. 4 is a rear structure diagram of the present invention;

fig. 5 is a schematic structural view of the frame of the present invention;

in the figure: 1. a door panel; 2. a synchronous belt A; 3. a frame; 4. a horizontal transfer mechanism; 5. vertically supporting; 6. a base plate; 7. vertically supporting; 8. leveling an angle; 9. a universal caster; 10. a fixed seat; 11. a hook motor; 12. positioning the optical eye A; 13. positioning the optical eye B; 14. a slideway A; 15. a slideway B; 16. a fixing plate; 17. an extension base; 18. a slide base; 19. a guide rail; 20. a transport frame; 21. a transfer motor; 22. a drive shaft; 23. a synchronizing wheel A; 24. a slide rail A; 25. a synchronous belt B; 26. a synchronizing wheel B; 27. an outer cover body; 28. a mounting frame; 29. a positioning switch; 30. a motor; 31. a supporting seat; 32. a synchronous belt C; 33. a synchronous motor; 34. a fixed seat; 35. a column; 36. An extension plate; 37. a connecting plate; 38. pressing a plate; 39. a square frame; 40 support columns; 41. a U-shaped support; 42. a cross bar; 43. a synchronizing wheel C; 44. a synchronous belt D; 45. a fixing member; 46. a slide rail B; 47. a draw hook rod body.

Detailed Description

The invention will be explained in more detail by the following examples, which disclose the invention and are intended to protect all technical improvements within the scope of the invention.

The external transmission mechanism of the safe deposit box described with reference to fig. 1-5 comprises a frame 3, a horizontal transmission mechanism 4 and a door opening mechanism, wherein the horizontal transmission mechanism 4 is horizontally arranged at the middle part of the frame 3, the door opening mechanism is arranged on the upper surface of the frame 3, a lifting mechanism for lifting and descending the horizontal transmission mechanism 4 is arranged at the rear part of the frame 3, the horizontal transmission mechanism 4 comprises a transmission frame 20, a drag hook component, a transmission motor 21, a fixing component 45 and a synchronous wheel C43, a slot is arranged at the middle part of the transmission frame 20 along the length direction, the drag hook component is fixed in the slot, a slide rail B46 is fixed at one side of the slot along the length direction, one side of the drag hook component is fixedly connected with a slide block on a slide rail B46 through an extension part at the front end of the fixing component 45, the transmission motor 21 is arranged outside one end of the transmission frame 20, and is connected with the synchronous wheel C43, hold-in range D44 is located the inboard of slide rail B46, mounting 45 includes upper plate and hypoplastron, the upper plate sets up on hold-in range D44, the hypoplastron sets up below hold-in range D44, and tooth on the hypoplastron and the tooth joint on the hold-in range D44, upper plate and hypoplastron pass through screw fixed connection, both sides are equipped with L shape slide A14, slide B15 respectively on frame 3, be equipped with the safe deposit box on slide A14, slide B15, and the draw hook subassembly articulates with the hangers of safe deposit box bottom.

Outer transport mechanism of safe deposit case, the drag hook subassembly includes fixing base 10, drag hook motor 11, location light eye A12 and the drag hook body of rod 47, set up the outside at fixing base 10 after the bearing in fixing base 10 is passed to the one end of drag hook body of rod 47, and the gear of drag hook body of rod 47 tip meshes with the gear on the drag hook motor 11 mutually, there is the dustcoat at fixing base 10 and drag hook motor 11's external connection, the other end external connection of drag hook body of rod 47 has the draw hook board, the hangers of draw hook board and safe deposit case bottom articulates, both sides at the drag hook body of rod 47 all are equipped with location light eye A12, be equipped with the card on the middle part outer fringe face of the drag hook body of rod 47, the card sets up in arbitrary one location light eye A12's recess, one side fixed connection of.

The outer conveying mechanism of the safe deposit box comprises door plates 1, mounting frames 28, sliding rails A24, transmission shafts 22 and motors 30, wherein the two mounting frames 28 are respectively arranged at two sides of the inner part of the upper end of a frame 3, the sliding rails A24 are respectively fixed on the mounting frames 28, bearing seats are respectively fixed at the rear parts of two ends of the two mounting frames 28, the transmission shafts 22 penetrate through the two bearing seats, two ends of each transmission shaft 22 are respectively arranged outside the bearing seats and connected with a synchronizing wheel A23, C-shaped outer cover bodies 27 are respectively fixed at the front parts of two ends of the two mounting frames 28, the synchronizing wheels B26 which are rotatably connected are respectively arranged in the outer cover bodies 27, a synchronizing belt B25 is respectively connected between the synchronizing wheel A23 and the synchronizing wheel B26 at the same side, the outer ends of the transmission shafts 22 are connected with the motors 30, the door plates 1 are provided with two door plates, extension plates 36 at two ends of one, a connecting plate 37 fixed with the door panel 1 is arranged on one side of each extending plate 36, the connecting plates 37 are arranged on the upper sections of the two synchronous belts B25, fixing plates 16 connected through screws are arranged below the connecting plates 37, and teeth on the inner surfaces of the fixing plates 16 are clamped with teeth on the synchronous belts B25; two ends of the other door panel 1 are respectively fixed with the sliding blocks on the two sliding rails A24, L-shaped pressing plates 38 are arranged on two end faces, the pressing plates 38 are arranged on the lower sections of the two synchronous belts B25, fixing plates 16 connected through screws are arranged below the pressing plates 38, and teeth on the inner faces of the pressing plates 38 are clamped with teeth on the synchronous belts B25.

In the outer conveying mechanism of the safe deposit box, the frame 3 comprises a square frame 39, a support column 40, a U-shaped support 41 and a bottom plate 6, a vertical support 7 fixed with the bottom plate 6 is arranged at one corner of the lower part of the square frame 39, vertical upright columns 35 are arranged at intervals in the middle of the rear part of the square frame 39 and are fixedly connected with the bottom plate 6, a cross rod 42 is arranged between the lower parts of the two upright columns 35, and a lifting mechanism is arranged on the cross rod 42; the lower part of the square frame 39 is provided with a U-shaped support 41 which is arranged in parallel with the square frame 39 up and down, a support column 40 is arranged between the square frame 39 and the U-shaped support 41, the open end of one side of the U-shaped support 41 is fixed in the middle of the vertical support 7, the open end of the other side of the U-shaped support is fixed in the middle of the upright post 35 through a transverse short plate, and the lower parts of the two sides of the U-shaped support 41 are provided with vertical supports 5 which are fixedly connected with the bottom.

The outer conveying mechanism of the safe deposit box comprises a lifting mechanism, a lifting mechanism and a lifting mechanism, wherein the lifting mechanism comprises a guide rail 19, a synchronous motor 33, a supporting seat 31 and a synchronous belt C32 which are respectively arranged on the inner surfaces of two upright posts 35, the guide rails 19 are respectively provided with a slide seat 18 fixedly connected with the side surface of the conveying frame 20, the cross bar 42 is provided with a synchronous motor 33 fixed by a fixed seat 34, an upper cross bar is connected between the upper ends of the two upright posts 35, an inverted U-shaped supporting seat 31 is arranged at the lower part of the upper cross bar, an upper synchronizing wheel is rotationally connected in the supporting seat 31, a lower synchronizing wheel is arranged on an output shaft of a synchronous motor 33, a synchronous belt C32 is connected between the upper synchronous wheel and the lower synchronous wheel, an extension seat 17 extending towards the direction of the synchronous belt C32 is arranged at the lower part of the conveying frame 20, the outer surface of the extension seat 17 is arranged on the inner surface of the synchronous belt C32, a fixing plate 16 connected through screws is arranged outside the extension seat 17, and inner teeth clamped with outer surface teeth of the synchronous belt C32 are arranged on the inner surface of the fixing plate 16.

The outer conveying mechanism of the safe deposit box is provided with a positioning light eye B13 at the upper part of the slide A14.

The outer transport mechanism of the safe box is provided with a positioning switch 29 outside the mounting frame 28.

In the outer conveying mechanism of the safe deposit box, four corners of the lower part of the bottom plate 6 are respectively provided with a leveling angle 8, and two sides of the lower part of the bottom plate 6 are respectively provided with a universal caster 9.

Implement the outer transport mechanism of safe deposit box, when using, horizontal transport mechanism 4 drives hold-in range D44 through conveying motor 21 and walks, the pull rod subassembly passes through mounting 45 to be fixed on hold-in range D44, thereby drive the pull rod subassembly and walk on the horizontal direction, pass through gear drive between drag hook body of rod 47 and drag hook motor 11, thereby drive drag hook body of rod 47 turned angle, make the card on the drag hook body of rod 47 break away from the recess of the location unthreaded eye A12 of one side, and enter into the recess of the location unthreaded eye A12 of opposite side, thereby control drag hook body of rod 47 turned angle for fixed angle, the hangers of drag hook board and safe deposit box bottom articulate, thereby drive the safe deposit box and be the horizontal direction on horizontal transport mechanism 4 and move; the horizontal conveying mechanism 4 lifts the safe deposit box to the door opening mechanism through a lifting mechanism, a conveying frame 20 of the horizontal conveying mechanism 4 is fixed on a sliding seat 18, an extending seat 17 extending is arranged at the lower part of the conveying frame 20 and is fixed on a synchronous belt C32 through a fixing plate 16, a synchronous motor 33 drives a lower synchronous wheel to rotate, a synchronous belt C32 is connected between an upper synchronous wheel and the lower synchronous wheel, and the synchronous belt C32 drives the conveying frame 20 and the upper safe deposit box to ascend or descend; the motor 30 drives the transmission shaft 22 to rotate, the transmission shaft 22 enables the synchronous belts B25 on two sides to walk, two ends of the two door panels 1 are respectively fixed with the upper half section and the lower half section of the synchronous belts B25, and when the motor 30 starts forward rotation or reverse rotation, the two door panels 1 do opening or combining actions; when the safe deposit box is used, the safe deposit box is hung and connected through the pull hook plate, the safe deposit box moves in the horizontal direction, the motor 30 drives the transmission shaft 22 to rotate, the two door plates 1 are opened, the conveying frame 20 conveys the safe deposit box to a position between the two door plates 1 through the lifting mechanism, and workers can take the safe deposit box out conveniently.

The part of the utility model not detailed is prior art.

The embodiments selected for the purpose of disclosing the invention, are presently considered to be suitable, it being understood, however, that the invention is intended to cover all variations and modifications of the embodiments, which fall within the scope of the concept and the utility model.

Claims

1. The utility model provides an outer transport mechanism of safe box, includes frame, horizontal transport mechanism and mechanism of opening the door, characterized by: the middle part of the frame is horizontally provided with a horizontal conveying mechanism, the upper part of the frame is provided with a door opening mechanism, the rear part of the frame is provided with a lifting mechanism which enables the horizontal conveying mechanism to ascend and descend, the horizontal conveying mechanism comprises a conveying frame, a drag hook assembly, a conveying motor, a fixing part and a synchronous wheel C, the middle part of the conveying frame is provided with a slot along the length direction, the drag hook assembly is fixed in the slot, one side of the slot is fixed with a slide rail B along the length direction, one side of the drag hook assembly is fixedly connected with a slide block on the slide rail B through an extension part at the front end of the fixing part, the conveying motor is arranged outside one end of the conveying frame and is connected with the synchronous wheel C at the lower part of the other end of the conveying frame through a synchronous belt D on an output shaft, the synchronous belt D is positioned on the inner side of the slide rail, and the teeth on the lower plate are clamped with the teeth on the synchronous belt D, the upper plate is fixedly connected with the lower plate through screws, an L-shaped slide A and a L-shaped slide B are respectively arranged on two sides of the upper surface of the frame, a safe deposit box is arranged on the slide A and the slide B, and the hook assembly is hung on a hanging lug at the bottom of the safe deposit box.

2. The external transport mechanism for a safe deposit box according to claim 1, wherein: the drag hook subassembly includes the fixing base, the drag hook motor, location light eye A and the drag hook body of rod, the one end of the drag hook body of rod sets up the outside at the fixing base after passing the bearing in the fixing base, and the gear of drag hook body of rod tip meshes with the gear on the drag hook motor mutually, there is the dustcoat at the external connection of fixing base and drag hook motor, the other end external connection of the drag hook body of rod has the hook plate, the hook plate articulates with the hangers of safe box bottom, all be equipped with location light eye A in the both sides of the drag hook body of rod, be equipped with the card on the middle part outer fringe face of the drag hook body of rod, the card sets up in the recess of arbitrary location light eye.

3. The external transport mechanism for a safe deposit box according to claim 1, wherein: the door opening mechanism comprises door plates, mounting frames, slide rails A, transmission shafts and motors, wherein the two mounting frames are arranged and are respectively arranged on two inner sides of the upper end of a frame, the slide rails A are fixed on the mounting frames, bearing seats are fixed on the rear parts of two ends of the two mounting frames, the transmission shafts are arranged in the two bearing seats in a penetrating manner, two ends of each transmission shaft are arranged outside the bearing seats and are connected with synchronizing wheels A, C-shaped outer cover bodies are fixed on the front parts of two ends of the two mounting frames, synchronizing wheels B which are rotatably connected are arranged in the outer cover bodies, a synchronizing belt B is connected between the synchronizing wheels A and the synchronizing wheels B on the same side, the outer ends of the transmission shafts are connected with the motors, the door plates are provided with two door plates, extension plates at two ends of one door plate are respectively fixed with slide blocks on the two slide rails A, connecting plates fixed with, the lower surfaces of the connecting plates are provided with fixing plates connected through screws, and teeth on the inner surfaces of the fixing plates are clamped with teeth on the synchronous belts B; the two ends of the other door plate are respectively fixed with the sliding blocks on the two sliding rails A, L-shaped pressing plates are arranged on the two end faces, the pressing plates are arranged on the lower sections of the two synchronous belts B, fixing plates connected through screws are arranged below the pressing plates, and teeth on the inner faces of the pressing plates are clamped with teeth on the synchronous belts B.

4. The external transport mechanism for a safe deposit box according to claim 1, wherein: the frame comprises a square frame, support columns, U-shaped supports and a bottom plate, wherein a vertical support fixed with the bottom plate is arranged at one corner of the lower part of the square frame, vertical stand columns are arranged at intervals in the middle of the rear part of the square frame and are fixedly connected with the bottom plate, a cross rod is arranged between the lower parts of the two stand columns, and a lifting mechanism is arranged on the cross rod; the lower part of the square frame is provided with a U-shaped support which is arranged in parallel with the square frame up and down, a support column is arranged between the square frame and the U-shaped support, the open end of one side of the U-shaped support is fixed at the middle part of the vertical support, the open end of the other side of the U-shaped support is fixed with the middle part of the upright post through a transverse short plate, and the lower parts of two sides of the U-shaped support are respectively provided with a vertical support and a bottom.

5. The external transport mechanism for a safe deposit box according to claim 1, wherein: elevating system is including setting up the guide rail on two stand inner faces respectively, synchronous machine, supporting seat and hold-in range C, be equipped with respectively on the guide rail with conveying frame side fixed connection's slide, be equipped with the synchronous machine who passes through the fixing base and fix on the horizontal pole, be connected with the horizontal pole between the upper end of two stands, be equipped with "U" shape supporting seat in the lower part of horizontal pole, be connected with the synchronizing wheel in the supporting seat internal rotation, install down the synchronizing wheel on synchronous machine's the output shaft, be connected with hold-in range C between last synchronizing wheel and the lower synchronizing wheel, conveying frame's lower part is equipped with the extension seat that extends to hold-in range C direction, the outside of extending the seat sets up the inner face at hold-in range C, the outside of extending the seat is equipped with the fixed plate through the screw connection.

6. The external transport mechanism for a safe deposit box according to claim 1, wherein: the upper part of the slideway A is provided with a positioning light eye B.

7. The external transport mechanism for a safe deposit box according to claim 1, wherein: and a positioning switch is arranged outside the mounting frame.

8. The outer transport mechanism for a safe deposit box according to claim 1, wherein the bottom plate has leveling corners at four lower corners thereof, and casters at two lower sides thereof.