JP2927272B2 - lift device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifting device, and more particularly, to a lifting device capable of moving display fixtures such as commodities up and down from the floor.

[0002]

2. Description of the Related Art In general, there are known movable fixtures such as merchandise display shelves and the like, which are provided with casters on the bottom of a base and those which are directly installed on the floor without providing casters. Among them, movable furniture can be immediately moved to an arbitrary position by releasing the rotation regulation of the casters.

[0003]

However, in the case of movable fixtures, it is necessary to replace the casters due to damage to the casters.
In this case, it is common practice to perform the replacement work by laying down the entire furniture horizontally, but prior to the work, all the displayed products must be removed from the shelves, and the products must be re-arranged after the casters are replaced. It has to be fixed, and there is a disadvantage that ancillary work accompanying the replacement of the caster is extremely troublesome.

[0004] Further, in the above-mentioned floor-mounted type furniture, since there are no casters, there is a disadvantage that the arrangement cannot be freely changed to an arbitrary position. In addition, when changing the arrangement of furniture of this type, it may be possible for multiple people to lift and move the whole, but in order to avoid inadvertent fall of the product, it is necessary to use a movable type In the same manner as described above, it is necessary to remove the products from the shelves and display them again, which causes substantially the same inconvenience as the movable type.

[0005]

SUMMARY OF THE INVENTION The present invention was devised in view of such inconveniences. The object of the present invention is to dispose the fixtures and the like below the bottom of the display fixture and the like so that the fixture and the like can be lifted. It is an object of the present invention to provide an elevating device which can be moved to an arbitrary position in accordance with the following.

[0006]

In order to achieve the above object, a lifting device according to the present invention is provided with a lower frame provided with casters which are arranged in a substantially horizontal posture and which can be grounded on the floor surface, and An upper frame arranged substantially in parallel, a jack structure arranged in an inner region of each frame and capable of expanding and contracting in a substantially horizontal plane, and connected to the jack structure and interposed between the frames. The jack structure comprises a pair of connecting shafts, and one end of each of the connecting shafts is rotatably supported in a substantially horizontal plane and extends in a direction in which the other end crosses the connecting shaft. Two arm members each of which is arranged substantially symmetrically with respect to a straight line connecting them; A drive member for moving the connected bodies in a direction of moving away from each other, and wherein the separation approach movement of the connected body is converted into the vertical approach movement of each frame via the link mechanism. Has been adopted. In such a configuration, if the pair of linked bodies are operated to be separated from each other in a state in which the entire lifting device is inserted and arranged under the furniture or the like, the upper frame is connected to the lower frame via a link mechanism interlocking with the pair of linked bodies. Can be lifted away from the floor, furniture and the like can be lifted off the floor, and can be moved as needed. In addition, since the moving direction of the connecting body is set to be substantially horizontal, the height of the entire elevating device can be suppressed, and the elevating device can be formed by forming a slight gap between the bottom of the furniture and the floor surface. Can be inserted into the bottom side of furniture or the like. Therefore, particularly easy application is possible to furniture and the like in which a gap is formed between the floor and the floor.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A link mechanism according to the present invention comprises a pair of movable bars fixed to the connecting member and extending between relative surfaces of a lower frame, and a pair of lower bars corresponding to both ends of the movable bars. Slits respectively formed on the surface, and a pair of movable support shafts which are provided so as not to fall off through the slits and which are connected to both ends of the movable bar at the tip end, and each movable support shaft at one end. It can be constituted by a pair of link pieces rotatably connected to a fixed shaft whose other end is located on a relative surface of the upper frame while being rotatably connected. According to such a configuration, the movable bar can be moved in a substantially horizontal direction following the separation and approach movement of the connector, and a total of four link pieces supported by the movable support shafts at both ends of the movable bar rotate. Then, the upper frame is pushed upward. Therefore, it is possible to realize the ascent and descent while maintaining the horizontal posture of the upper frame in a well-balanced manner, and it is possible to reliably prevent the furniture and the like mounted thereon from tilting.

It is preferable that the pair of link pieces be connected to each other via a plate-like member. As a result, the strength of each link piece can be reinforced, and the load bearing capacity can be increased.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic perspective view of a lifting device according to this embodiment. In this figure, an elevating device 10 includes a lower frame 11 in a substantially horizontal posture, an upper frame 12 disposed above the lower frame 11 and disposed substantially in parallel with the lower frame 11, and a lower frame 11.
And a jack structure 14 arranged in an inner region of the upper frame 12 and a pair of link mechanisms 15 connected to the jack structure 14 and interposed between the frames 11 and 12. I have.

As shown in FIGS. 2 to 4, the lower frame 11 has a pair of front and rear lower frame forming members 11A and 11B so as to form a rectangular frame when viewed from above.
A pair of left and right lower frame formers 11C, 1 interconnecting both ends of the lower frame formers 11A, 11B.
1D. The front and rear lower frame forming bodies 11A and 11B are provided in an external shape that extends in the axial direction and open at the upper end side in a U-shape, while the left and right lower frame forming bodies 11C and 11D are provided in a prismatic external shape. I have. The front and rear lower frame forming bodies 11A and 11B
A slit 17 extending in a substantially horizontal direction is formed in a relative surface on both the left and right sides, and a cutout portion 18 whose central portion in the axial direction is concave is formed in the lower frame forming body 11A on the front side. . Guide projections 19 to be inserted into the upper frame 12 are provided on the upper surfaces of both ends of the left and right lower frame forming bodies 11C and 11D, respectively. Here, the left and right lower frame forming bodies 11
Brackets 20 each having an L-shaped side end surface are fixed to both outer surfaces of both ends of C and 11D. On the lower surface side of each of these brackets 20, casters 22 constituting moving means capable of contacting the floor surface are provided. Each is fixed (see FIG. 1).

The upper frame 12 is shown in FIGS.
As shown in the figure, the lower frame 11 is provided substantially vertically symmetrically. That is, the upper and lower frame forming bodies 12A and 12B and the left and right upper frame forming bodies 12C and 12D are provided. Here, a concave notch 24 corresponding to the notch 18 on the lower frame side is formed in a substantially central region of the upper frame forming body 12A located on the front side. As shown in FIGS. 6 and 7, screw holes 25 are formed in the front and rear upper frame forming bodies 12 </ b> A and 12 </ b> B on opposite sides thereof. Is provided to be screwable. On the other hand, holes 28 are formed in the lower surfaces on both ends of the left and right upper frame forming bodies 12C and 12D, and the guide projections 19 on the lower frame 11 side are inserted into these holes 28 so that the lower frame 11 and the upper frame 1
1 can move close to and away from each other while maintaining a parallel posture.

As shown in FIG. 1, the lower frame 11 includes front and rear lower frame forming bodies 11A, 11A.
A reinforcement plate 30 is laid over a substantially intermediate region of B through means such as welding, and the jack structure 14 is supported at a position slightly floating above the upper surface of the reinforcement plate 30. The jack structure 14 has, for example, a configuration substantially equivalent to a commercially available jack for an automobile. More specifically, the jack structure 14 has a pair of connecting shafts 31, 31 located at both ends in the longitudinal direction of the reinforcing plate 30, and one end of each of the connecting shafts 31 is rotatably connected in a substantially horizontal plane. Arm members 33A and 33B and the arm member 33 in which each of the two
C, 33D, a pair of connecting bodies 35, 35 for connecting the respective ends of the arm members 33A, 33B and the arm members 33C, 33D so as to be relatively rotatable in a substantially horizontal plane, and passing through the connecting shafts 31, 31. Extending these connecting shafts 3
1, 31 and a screw shaft 36 as a driving member that is screw-engaged.

Each of the arm members 33A to 33D has an outer shape having a substantially U-shaped cross section, and the arm members 33C and 33D have a slightly narrower U-shaped opening width than the arm members 33A and 33B. The arm members 33A, 33C and 33B, 33D are connected to the connecting shaft 31,
Rotation is possible at 31 positions without mutual interference. The distal ends of the arm members 33A and 33B and the arm members 33C and 33D are rotatably connected to the connecting members 35 and 35 via pins 38 in a horizontal plane.

The screw shaft 36 is connected to each of the connecting shafts 31 and 3.
1 and is provided so as not to move in the axial direction. A ring member 36A which can be positioned in a space formed by the concave cutouts 18 and 24 is provided at one end of the screw shaft 36 on the front side, while the other end of the reinforcing plate 30 is provided at the other end. It is provided so as to substantially abut the upright wall 30A provided at the rear end. Therefore, by hooking the tip end hook portion of the rod-shaped operation rod 39 shown in FIG. 1 on the ring member 36A and rotating the same, the arm members 33A are moved so that the connecting portions 35 are separated from each other. A relative angle of ~ 33D can be displaced.

As shown in FIG. 8, the connecting member 35 includes a U-shaped member 40 having an open width capable of receiving the respective tips of the arm members 35A to 35D,
It is constituted by an L-shaped member 41 which is connected to the bottom wall 40A of the "0" and is longer than the U-shaped member 40. Here, the side walls 40B of the U-shaped member 40,
In the 40C, two holes 42 located on the same axis are formed, and the pins 38 are inserted through these holes 40 so that the distal ends of the arm members 35A to 35D can be connected. In addition, bolts 44 are inserted into the vertical wall portion 41A of the L-shaped member 41 at two positions on the left and right, and the link mechanism 15 can be connected via these bolts 44.

As shown in FIGS. 1 and 8, the link mechanism 15 includes a pair of movable bars 46, 46 disposed between the front and rear lower frame forming bodies 11A, 11B of the lower frame 11, and these movable bars 46, 46. 46, 46 are provided with a total of four link pieces 47 whose one end is rotatably connected and whose other end is rotatably connected to the front and rear upper frame forming bodies 12A, 12B.

The movable bar 46 is, as shown in FIG.
A nut member 49 is fixedly provided at both inner ends of the prism. A movable support shaft 50 that passes through the slit 17 formed on the relative surface of the front and rear lower frame forming bodies 11A and 11B and is fixed to the slit 17 so as not to fall off is screwed into the nut member 49. ing. In the movable bar 46,
Screw holes 52, 52 are formed in two places on the surface on the side of the connecting body 35, and the bolts 44 are screwed into these screw holes 52, thereby interconnecting the connecting body 35 and the movable bar 46. Will be Therefore, since the movable bar 46 is supported between the front and rear frame forming bodies 11A and 11B by the movable supporting shaft 50 penetrating the slit 17, the jack structure 14 is connected to the frame via the connecting bodies 35 and 35. It can be supported in a state of being suspended in the insides 11 and 12.

As shown in FIG. 8, each of the link pieces 47 is formed of a piece-like member that can be interposed between the front and rear lower frame forming bodies 11A and 11B and the nut members 49 and 49, respectively. I have. Holes 54 and 55 are respectively formed on both ends of each link piece 47, and one end of the link piece 47 is rotatably connected by inserting the movable support shaft 50 into the hole 54. On the other hand, the hole 55 is formed between the front and rear frame forming bodies 12A, 12A in the upper frame 12.
The fixed shaft 26 is positioned so as to be positioned on the same axis as the screw hole 25 formed in B, so that the other end of the link piece 47 can be connected to the upper frame 12. Further, the link pieces 47 are connected to each other via a plate-like member 57 and provided in an integrated structure.

Next, the operation and use of the lifting device 10 according to the present embodiment will be described with reference to FIGS. 9 and 10. FIG. FIG. 9 is a principle diagram simply showing the separating and approaching operation of the lower frame 11 and the upper frame 12. In addition, as the display furniture supported by the elevating device 10, as shown in FIG. 10, a display shelf 60 having a certain gap on the bottom side will be described.

First, as shown in FIG. 10, the entire elevating device 10 is moved in the direction of the arrow to sink into the bottom gap of the display shelf 55. Then, as shown in FIG. 9, when the operation rod 39 is engaged with the ring member 36 </ b> A provided on one end side of the screw shaft 36 and rotated in the direction of the arrow a or b, the screw shaft 36 rotates. Will be done. Since the screw shaft 36 cannot move in the axial direction, the pair of front and rear connection shafts 31 and 31 engaged with the screw shaft 36 move away from each other along the axis of the screw shaft 36, and each of the arm members 33A to 33A-3.
The 3D displacement of the relative angle changes the distance between the pair of connectors 35.

Here, when the connecting members 35, 35 move in a direction to enlarge their mutual separation dimension, the movable bars 46, 46 fixed thereto move outward along the slits 17, 17, respectively. I do. And the movable bar 46
One end of the link piece 47 rotatably connected to the movable support shaft 50 located at both ends of the link member also attempts to move simultaneously.
Then, since the other end of the link piece 47 is connected to the fixed shafts 26 on the front and rear frame forming bodies 12A and 12B of the upper frame 12, the link piece 47 is gradually displaced in the upright direction. As a result, the upper frame 12 rises to increase the separation width from the lower frame 11. At this time, the upper frame 12 is raised by the left and right frame forming bodies 1 in the lower frame 11.
It is smoothly guided by the guide projections 19 on 1C and 11D.

The display shelf 60 is raised by raising the upper frame 12.
When the display shelf 60 is slightly lifted off the floor by being pushed up, the display shelf 60 can be moved to an arbitrary position by the casters 22, and the display shelf 60 can be moved to the predetermined installation location and the operation described above is performed in reverse to move the display shelf 60 to the floor surface. Can be installed.

In the case of a display shelf having no gap on the bottom side, the display shelf can be moved by lifting the display shelf to such an extent that the lifting device 10 can be inserted and placing it on the lifting device 10. If the display shelf is of a large width, a plurality of elevating devices 10 can be inserted into the bottom side for use.

Therefore, according to such an embodiment, it is possible to provide a structure in which the height of the entire lifting device 10 is suppressed,
The invention can be applied to furniture having a small gap, and maintenance and replacement work of casters can be performed with a small amount of labor.

In the above embodiment, the casters 22 are employed as the moving means. However, the present invention is not limited to this, and may be replaced with, for example, a slider which can slide on the floor. In addition, a hydraulic cylinder device is provided as a driving member instead of the screw shaft 36, and a pedal is provided which protrudes outward from the concave cutouts 18, 24 so that the cylinder device can be operated by depressing the pedal. Can be adopted. However, according to the configuration of the embodiment, there is an advantage that the lifting device 10 can be configured at a relatively low cost. Further, the connecting body 35 and the movable bar 46 may be configured as an integral type. Further, the frames 11 and 12 are provided with the frame forming bodies 11A to 1A.
1D and 12A-12D can also be comprised so that a length can be changed in an axial direction, and this may make the area | region which supports the bottom part of furniture etc. expandable.

[0027]

As described above, according to the present invention,
The connector is connected to the jack structure so that it can be moved in a substantially horizontal plane, and a link mechanism is provided between the connector and the frame, so that the upper and lower frames can be separated and approached to each other. From above, the upper frame can be lifted away from the lower frame by operating the pair of linked bodies to be separated from each other in a state where the entire lifting device is inserted under furniture and the like, and the furniture and the like can be lifted from the floor surface. It can be moved as needed.
In addition, since the moving direction of the connecting body is set to be substantially horizontal, the height of the entire lifting device can be suppressed, and the lifting device can be formed only by forming a small gap between the bottom of the furniture and the floor surface. Can be inserted into the furniture bottom side. Moreover, since the elevating member is constituted by the frame, the elevating surface can be secured in a wide area, and the furniture and the like can be lifted in a stable state.

The link mechanism includes a movable bar fixed to the connecting body, a movable support shaft provided to move both ends of the movable bar along the slit, and a fixing between the movable support shaft and the upper frame. Since the movable bar is configured by a link piece rotatably connected to the shaft, the movable bar can be moved in a substantially horizontal direction following the separation and approach movement of the connected body, and the movable bar at both ends of the movable bar can be moved. A total of four link pieces supported by the support shaft can be rotated to achieve vertical movement while maintaining the horizontal attitude of the upper frame, and it is possible to reliably prevent the furniture and the like mounted thereon from tilting. .

Further, according to the configuration in which the pair of link pieces are connected to each other via the plate-like member, the load concentration on the link pieces is eliminated, and the load-bearing capacity through the reinforcement of the strength of each link piece can be increased. .

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a lifting device according to an embodiment.

FIG. 2 is a plan view of a lower frame.

FIG. 3 is a front view of a lower frame.

FIG. 4 is an enlarged sectional view taken along line AA of FIG. 2;

FIG. 5 is a plan view of an upper frame.

FIG. 6 is a front view of the upper frame.

FIG. 7 is an enlarged sectional view taken along line BB of FIG. 5;

FIG. 8 is an enlarged exploded perspective view of a main part showing a configuration of a link mechanism.

FIG. 9 is a principle diagram for explaining the operation of the lifting device.

FIG. 10 is a perspective view showing an example of use of the lifting device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Elevating apparatus 11 Lower frame 12 Upper frame 14 Jack structure 15 Link mechanism 17 Slit 22 Caster as a moving means 26 Fixed shaft 31 Connection shaft 33A Arm member 33B Arm member 33C Arm member 33D Arm member 35 Connection body 36 Drive member Screw shaft 46 Movable bar 47 Link piece 50 Movable support shaft 57 Plate member

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification symbol FI B66F 5/02 B66F 5/02 9/06 9/06 A (58) Field surveyed (Int.Cl. ⁶ , DB name) B66F 7/06 B66F 3/12 B66F 5/00 B66F 5/02 B66F 9/06

Claims (3)

(57) [Claims] 1. A lower frame provided with a moving means which is arranged in a substantially horizontal posture and which can be grounded on a floor surface, an upper frame which is arranged substantially in parallel with the lower frame, and an inner frame of each of these frames. A jack structure that is arranged and expandable in a substantially horizontal plane, and a pair of link mechanisms connected to the jack structure and interposed between the frames, wherein the jack structure has a pair of connecting shafts. And two arm members each having one end side rotatably supported in a substantially horizontal plane on the connecting shafts and extending in a direction in which the other end sides intersect and arranged substantially symmetrically with respect to a straight line connecting the connecting shafts. And, a pair of connecting members for connecting the tips of the two arm members to each other so as to be relatively rotatable in a substantially horizontal plane, and a driving member for moving these connecting members in a direction away from and approaching each other, An elevating device wherein the separated approaching movement of the connector is converted into a vertically approaching movement of each frame via the link mechanism. 2. The link mechanism is formed on a pair of movable bars fixed to the connecting body and extending between the relative surfaces of the lower frame, respectively, and on a relative surface of the lower frame corresponding to both ends of the movable bars. And a pair of movable support shafts, which are provided so as not to fall off through the slits and whose leading ends are respectively connected to both ends of the movable bar, and one end is rotatably connected to each of the movable support shafts. The lifting device according to claim 1, wherein the other end comprises a pair of link pieces rotatably connected to a fixed shaft located on a relative surface of the upper frame. 3. The lifting device according to claim 2, wherein the pair of link pieces are connected to each other via a plate-like member.