Tabletop lifting / lowering furniture

Abstract

To provide a tabletop lifting / lowering furniture having excellent workability in installation.SOLUTION: Tabletop lifting / lowering furniture comprises a support structure 3 to be fixed to a floor, and a tabletop liftably / lowerably supported by the support structure 3. The support structure 3 includes a base structure 5 having a base plate 10 to be fastened to the floor and a telescopic part 6 connected to the base structure 5 in an upright state and formed to vertically telescopically move between the tabletop and the base structure 5. The base structure 5 includes and upper plate part 16 having a placement object surface 15a on which the telescopic part 6 is placed. The telescopic part 6 includes a lower flange 43 to be placed on the placement object surface 15a.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a furniture unit with a liftable top. [Background technology]

[0002] Conventionally, in work spaces such as offices and public facilities, desk equipment is generally provided to provide workers with a work area. In such desk equipment, since the height of the tabletop that is easy to work at varies depending on the physique, sex, and preferences of the worker, a tabletop lifting fixture with a lifting function that allows the height of the tabletop to be changed is used. This makes it possible to provide a work area with a tabletop height that meets the needs of the worker, thereby reducing the burden on the worker.

[0003] A lifting tabletop fixture is provided with a support structure that is formed to be expandable in the vertical direction, fixed to the floor surface, and supports the tabletop. For example, Patent Document 1 discloses a support structure provided on a desk that can change the height of the tabletop, which includes a grounding part fixed to the floor by an anchor bolt, and a support column part that is formed to be expandable, supports the tabletop, and protrudes from the seat panel. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2011-110406 ​​A Summary of the Invention [Problem to be solved by the invention]

[0005] However, if the support pole is fixed in advance in an upright position relative to the ground contact part, the support pole tends to fall over with the ground contact part as a fulcrum when fixing it to the floor, leaving room for improvement in workability. Also, since the ground contact part is fixed to the floor in an upright position, it may get in the way of other work.

[0006] Therefore, the present invention provides a display unit with a liftable top that is easy to install. [Means for solving the problem]

[0007] The first aspect of the present invention is a liftable tabletop display fixture that comprises a support structure fixed to a floor and a tabletop supported on the support structure so that it can be raised and lowered. The support structure comprises a grounding section having a fixed section that is fastened to the floor, and an expansion section that is connected to the grounding section in an upright position above the grounding section and is formed so as to be expandable and contractable in the vertical direction between the tabletop and the grounding section. The grounding section comprises an attachment section having a support surface on which the expansion section is placed, and the expansion section comprises an attachment section that is placed on the support surface.

[0008] According to the first aspect, the telescopic part, which is separate from the ground part, is connected in an upwardly standing state to the ground part fixed to the floor by the fixed part, so that the work of fixing the ground part to the floor can be easily performed without being affected by the weight of the telescopic part. Furthermore, since the mounting part of the telescopic part is placed on the mounting surface of the mounting part of the ground part, it is possible to omit adjusting the vertical position of the telescopic part relative to the ground part when connecting the telescopic part to the ground part. This also makes it easy to install the telescopic part relative to the ground part. Therefore, it is possible to provide a tabletop lifting fixture with excellent workability during installation.

[0009] A second aspect of the present invention relates to a lift-top display fixture according to the first aspect, wherein the mounted portion and the mounting portion are connected to each other.

[0010] According to the second aspect, the expandable portion can be firmly attached to the support surface, and therefore the expandable portion can be more firmly connected to the ground portion.

[0011] A third aspect of the present invention relates to a lift-top display fixture in which the telescopic portion is provided on the mounting portion and has a protruding portion that protrudes in a direction intersecting the vertical direction and is connected to the mounted portion in the first or second aspect described above.

[0012] According to the third aspect, the lower surface of the protruding portion can be opposed to the mounting surface of the grounding portion from above. Since a space is formed above the protruding portion, the work of connecting the mounting portion including the protruding portion to the mounting portion of the grounding portion can be easily performed from above. Therefore, the workability during installation can be further improved.

[0013] A fourth aspect of the present invention relates to a lift-top display fixture that is a lift-top display fixture according to any one of the first to third aspects above, wherein the mounting part is located above the fixed part, and downward displacement is restricted.

[0014] According to the fourth aspect, since the attached part is positioned above the fixed part, the fixed part can be fastened to the base floor of the double flooring, and the height of the supporting surface can be set to a height close to the floor surface of the upper layer of the double flooring.

[0015] A fifth aspect of the present invention relates to a lift-top display fixture that is a lift-top display fixture according to any one of the first to third aspects above, wherein the mounting portion is formed so that the position of the supporting surface in the vertical direction can be changed.

[0016] According to the fifth aspect, after the fixed part is fastened to the base floor of the double floor, the height of the supporting surface can be set to a height close to the floor surface of the upper layer of the double floor in accordance with the height of the panel of the upper layer of the double floor. Effect of the Invention

[0017] According to the present invention, a lift-top type fixture that is easy to install can be provided. [Brief description of the drawings]

[0018] [Figure 1] FIG. 1 is a perspective view of a liftable tabletop fixture 1 according to an embodiment of the present invention. [Diagram 2] FIG. 1 is a perspective view of a liftable tabletop fixture 1 according to an embodiment of the present invention, showing the state in which the tabletop 2 has been removed. [Diagram 3]2 is a perspective view of a base structure 5 and an expandable portion 6 according to the embodiment. FIG. [Figure 4] FIG. 2 is a perspective view of a base structure 5 according to the embodiment. [Diagram 5] FIG. 2 is a plan view of a base structure 5 and an expandable portion 6 according to the embodiment. [Figure 6] FIG. 3 is a perspective view of the liftable tabletop fixture 1 according to the embodiment, showing a state in which a part of a storage housing 4 has been removed from the liftable tabletop fixture 1 shown in FIG. 2. [Figure 7] FIG. 3 is a perspective view of the liftable tabletop fixture 1 according to the embodiment, showing a state in which a part of a storage housing 4 has been removed from the liftable tabletop fixture 1 shown in FIG. 2. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the following description, components having the same or similar functions will be given the same reference numerals. Duplicate descriptions of those components may be omitted. In the following description, the direction perpendicular to the floor surface F on which the lifting tabletop fixture 1 is installed is defined as the up-down direction (arrow UP is the upward direction), and the directions perpendicular to the up-down direction are defined as the front-rear direction (arrow FR is the forward direction) and the left-right direction (arrow LH is the left direction), respectively.

[0020] FIG. 1 is a perspective view of a liftable tabletop fixture 1 according to an embodiment of the present invention. As shown in Figure 1, the lifting table fixture 1 is installed in a room that employs a double floor structure in which a space of a specified vertical width is formed between a foundation floor B, such as a concrete slab, and a floor panel P that forms the floor surface F. In the following explanation, at least one of the foundation floor B and the floor panel P will be referred to simply as the floor.

[0021] FIG. 2 is a perspective view of the liftable tabletop fixture 1 according to the embodiment, showing a state in which the tabletop 2 has been removed. As shown in Figures 1 and 2, the lifting tabletop fixture 1 comprises a tabletop 2, a support structure 3 that is fixed to the floor and supports the tabletop 2, and a storage housing 4 that is arranged to surround the support structure 3. The tabletop 2 is formed in the shape of a flat plate that extends in the horizontal direction. The tabletop 2 is formed to be long in the front-to-rear direction, and is arranged to protrude forward from the support structure 3 in a plan view.

[0022] FIG. 3 is a perspective view of the base structure 5 and the expandable portion 6 according to the embodiment. As shown in Figure 3, the support structure 3 comprises a base structure 5 (grounding portion) that is fixed to a foundation floor B, and an expansion portion 6 that is connected to the base structure 5 in an upright position above the base structure 5 and is formed to be expandable and contractible in the vertical direction.

[0023] FIG. 4 is a perspective view of the base structure 5 according to the embodiment. 3 and 4, the base structure 5 includes a base plate 10 (fixed portion), a base 15, a standing wall 20, a connecting portion 25, and a bracket 30. The base structure 5 is made of metal. The base plate 10 is a fixed part that is fastened to the upper surface of the foundation floor B. The base plate 10 has a rectangular shape in plan view with the longitudinal direction being the front-to-rear direction. Through holes through which anchor bolts are inserted are formed in the four corners of the base plate 10. The base plate 10 is fastened to the foundation floor B via the anchor bolts.

[0024] The base 15 is disposed above the base plate 10. The base 15 is disposed so as to avoid the through-hole of the base plate 10. The base 15 is connected to the base plate 10, and downward displacement is restricted. The base 15 has a support surface 15a on which the expandable portion 6 is placed. The support surface 15a extends in the horizontal direction and faces upward. For example, the support surface 15a is flush with the floor surface F. However, the support surface 15a only needs to be located above the upper surface of the foundation floor B, and may be shifted in the vertical direction relative to the floor surface F. The support surface 15a has a rectangular shape in plan view with a pair of sides extending in the front-rear direction and the remaining pair of sides extending in the left-right direction. The entire support surface 15a is located inside the outline of the base plate 10 in plan view.

[0025] The base 15 is formed as a single unit in the shape of a box that opens downward. The base 15 includes a rectangular upper plate portion 16 (attached portion) having a placement surface 15a, and side plate portions 17 that define a space below the upper plate portion 16 from the front, rear, left and right. The upper plate portion 16 is connected to the base plate 10 via the side plate portions 17, and cannot be displaced relative to the base plate 10. The side plate portion 17 is connected to the base plate 10 and extends upward from a portion where the side plate portion 17 is connected to the base plate 10. The side plate portion 17 is fixed to the upper plate portion 16. The side plate portion 17 includes a front plate portion 17f that extends downward from a front edge of the upper plate portion 16, a rear plate portion 17r that extends downward from a rear edge of the upper plate portion 16, and a left plate portion and a right plate portion that extend in the front-rear direction between the front plate portion 17f and the rear plate portion 17r and are arranged at a distance from each other in the left-right direction. A through hole through which a fastening member such as a bolt is inserted is formed at each of the four corners of the upper plate portion 16. The lower end portions of the front plate portion 17f and the rear plate portion 17r are inseparably joined to the base plate 10 by welding or the like.

[0026] The standing wall 20 is disposed above the base plate 10 and stands on the base plate 10. The lower end of the standing wall 20 is inseparably connected to the base plate 10. The standing wall 20 is adjacent to the base 15 in the longitudinal direction of the base plate 10. In this embodiment, the standing wall 20 is disposed behind the base 15. The entire standing wall 20 is located inside the outline of the base plate 10 in a plan view. The standing wall 20 includes a front wall 21 and a pair of left and right side walls 22. The front wall 21 is formed in a flat plate shape. The front wall 21 extends in the up-down direction with a constant width with the front and back sides facing the front-rear direction. The lower part of the front wall 21 is disposed along the rear plate portion 17r of the base 15. The front wall 21 may be directly connected to the base 15 by welding or the like. The front wall 21 protrudes upward from the placement surface 15a of the base 15. The pair of side walls 22 are each formed in a flat plate shape. The pair of side walls 22 extend rearward from side edges extending in the up-down direction of the front wall 21. The rear edges of the side walls 22 extend forward from their lower ends toward the front wall 21. For example, the standing wall 20 is formed by bending a single plate material at the boundaries between the front wall 21 and each side wall 22.

[0027] The connecting portion 25 is disposed above the base 15 and fixed to the standing wall 20. The connecting portion 25 connects the stretching portion 6 connected to the base 15 and the standing wall 20. The connecting portion 25 is disposed at a distance in the vertical direction with respect to the placement surface 15a of the base 15. The connecting portion 25 includes a front portion 26 disposed in front of the front wall 21 of the standing wall 20, and a pair of left and right connecting portions 27 connecting the front portion 26 and the standing wall 20. The front portion 26 is disposed at a distance in the front-rear direction with respect to the front wall 21 of the standing wall 20. The front portion 26 is formed in a flat plate shape and is disposed with the front and back surfaces facing the front-rear direction. The front portion 26 extends in the left-right direction with a constant width. The pair of connecting portions 27 are each formed in a flat plate shape. The pair of connecting portions 27 extend rearward from the side edges of the front portion 26 extending in the vertical direction. The rear end of each connecting portion 27 overlaps with the upper end of the outer surface facing outward in the left-right direction of the side wall 22 of the standing wall 20. The rear end of each connecting portion 27 is joined to the side wall 22 of the standing wall 20. Each connecting portion 27 is detachably joined by fastening or the like.

[0028] The pair of brackets 30 are connected to the storage housing 4. The pair of brackets 30 are provided one-to-one on the pair of side walls 22 of the standing wall 20. Each bracket 30 includes a first connecting portion 31 connected to the side wall 22, a second connecting portion 32 connected to the storage housing 4, and a step connecting portion 33 connecting the first connecting portion 31 and the second connecting portion 32. The first connecting portion 31 is disposed above the placement surface 15a of the base 15. The first connecting portion 31 overlaps the outer surface of the side wall 22. The first connecting portion 31 is disposed below the rear end of the connection portion 27 of the connecting portion 25. The first connecting portion 31 is connected to the side wall 22. The first connecting portion 31 is detachably connected by fastening or the like. However, the first connecting portion 31 may be inseparably connected to the standing wall 20 by welding or the like. The second connecting portion 32 is disposed rearward of the first connecting portion 31 and on the outer side in the left-right direction. The second coupling portion 32 is detachably coupled to the storage housing 4 by fastening or the like. The step connection portion 33 extends in the left-right direction and connects the rear end of the first coupling portion 31 to the front end of the second coupling portion 32. For example, each bracket 30 is formed by bending a single plate material at the boundary between the first coupling portion 31 and the step connection portion 33 and the boundary between the second coupling portion 32 and the step connection portion 33.

[0029] As shown in FIG. 3, the telescopic unit 6 is provided separately from the base structure 5 and is disposed on the pedestal 15 of the base structure 5. At least a part of the telescopic unit 6 is located above the floor surface F of the floor panel P. The telescopic unit 6 is interposed between the top plate 2 and the base structure 5. The telescopic unit 6 has a mounting surface facing the mounting surface 15a of the pedestal 15. The mounting surface extends in the horizontal direction and faces downward. The mounting surface is in surface contact with the mounting surface 15a. The telescopic unit 6 can stand on its own on the mounting surface 15a without being connected to the base structure 5. The telescopic unit 6 includes a lifting unit 40 extending in the vertical direction, a lower flange 43 (mounting portion) located at the lower end of the telescopic unit 6, and an upper flange 45 located at the upper end of the telescopic unit 6.

[0030] Fig. 5 is a plan view of the base structure 5 and the expandable portion 6 according to the embodiment. Note that Fig. 5 shows a state in which the upper flange 45 of the expandable portion 6 has been removed. As shown in FIG. 3 and FIG. 5, the lifting unit 40 includes a plurality of cylindrical bodies 41 having different planar cross-sectional dimensions. For example, the plurality of cylindrical bodies 41 are made of metal. The plurality of cylindrical bodies 41 have a telescopic structure. Each cylindrical body 41 is formed in a rectangular tube shape and is arranged with its outer circumferential surface facing the front-rear and left-right directions. The lifting unit 40 is deformed by a drive mechanism arranged inside the cylindrical body 41 so that the inner cylindrical body 41 appears and disappears in the vertical direction relative to the outermost cylindrical body 41. In this way, the lifting unit 40 expands and contracts in the vertical direction.

[0031] As shown in FIG. 3, the lower flange 43 is connected to the lower end of the lifting unit 40. The lower flange 43 is made of metal. The lower flange 43 has the above-mentioned mounting surface. The entire lower flange 43 overlaps the upper plate portion 16 of the base 15. The lower flange 43 is formed in a flat plate shape extending in the horizontal direction. The lower flange 43 has a rectangular shape in a plan view, with a pair of sides extending in the front-rear direction and the remaining pair of sides extending in the left-right direction.

[0032] The telescopic portion 6 has a protruding portion 43a provided on the lower flange 43 and protruding in a direction perpendicular to the vertical direction. The protruding portion 43a protrudes horizontally from a portion of the telescopic portion 6 adjacent to the lower flange 43 (the lower end portion of the lifting unit 40 in this embodiment). As a result, the protruding portion 43a defines a space above it. The protruding portion 43a is provided over the entire outer periphery of the lower flange 43. The protruding portion 43a has a through hole penetrating in the vertical direction. The through hole is formed at a portion corresponding to each of the four corners of the lower flange 43. The through hole is formed so as to correspond one-to-one with the through hole of the upper plate portion 16 when viewed from the vertical direction. A fastening portion that is inserted into the through hole of the upper plate portion 16 is inserted into the through hole. The protruding portion 43a is fastened to the upper plate portion 16, and is directly and detachably coupled to the base 15 by a fastening force in the vertical direction. By fastening the protruding portion 43a to the upper plate portion 16, the base 15 and the expandable portion 6 are connected to each other at their overlapping portions in the vertical direction.

[0033] The upper flange 45 is connected to the upper end of the lifting unit 40. The upper flange 45 is made of metal. The upper flange 45 is formed in a flat plate shape that extends in the horizontal direction. The upper flange 45 has a rectangular shape in a plan view with a pair of sides extending in the front-rear direction and the remaining pair of sides extending in the left-right direction. The upper flange 45 is displaced in the up-down direction as the lifting unit 40 expands and contracts.

[0034] The extension / contraction section 6 passes between the standing wall 20 and the connecting section 25 and stands on the base 15. The upper flange 45 is located above the connecting section 25. The outermost cylindrical body 41 of the lifting unit 40 is connected to the front section 26 of the connecting section 25 so as not to be displaceable relative to the standing wall 20. As a result, the extension / contraction section 6 is connected to the standing wall 20 via the connecting section 25. The extension / contraction section 6 is not in contact with any part of the base structure 5 other than the base 15 and the front section 26 of the connecting section 25.

[0035] FIG. 6 is a perspective view of the liftable tabletop fixture 1 according to the embodiment, showing a state in which a part of the storage housing 4 is removed from the liftable tabletop fixture 1 shown in FIG. As shown in FIG. 6, the support structure 3 further includes a cover 7 that surrounds the extension / contraction section 6, and a support frame 8 that is supported by the extension / contraction section 6, moves up and down as the extension / contraction section 6 extends and contracts, and supports the top board 2.

[0036] The cover 7 is formed in a rectangular tube shape so as to surround the telescopic portion 6. The cover 7 is made of metal. The cover 7 moves up and down together with the top plate 2 as the telescopic portion 6 extends and retracts. The lower end of the cover 7 is at approximately the same height as the placement surface 15a of the base 15 when the top plate 2 is at the lower end position. The upper end of the cover 7 is at approximately the same height as the upper flange 45 of the telescopic portion 6. The cover 7 surrounds the front portion 26 of the standing wall 20 and the portion of the connecting portion 25 located forward of the front portion 26 of the standing wall 20 together with the telescopic portion 6. A pair of left and right slits 7a extending upward from the lower end edge of the cover 7 are formed at the rear of the cover 7. The side wall 22 of the standing wall 20 and the connecting portion 27 of the connecting portion 25 are inserted in the front-rear direction into each slit 7a. This allows the cover 7 to move up and down relative to the base structure 5 without interfering with the base structure 5.

[0037] The support frame 8 is connected to the extension / contraction section 6 so as to be immovable relative to the extension / contraction section 6. The support frame 8 supports the top plate 2 from below. The support frame 8 is made of metal. The support frame 8 includes a base 60 connected to the upper flange 45 of the extension / contraction section 6, a pair of batten members 62 extending forward from the base 60, and a connecting portion 64 connecting the front ends of the pair of batten members 62. The base 60 is connected to the upper end of the cover 7 so as to be immovable relative to the extension / contraction section 6. The pair of batten members 62 are connected to the base 60 so as to be immovable relative to the extension / contraction section 6. The pair of batten members 62 are arranged side by side in the left-right direction and spaced apart from each other in the left-right direction. The pair of batten members 62 are arranged so as to sandwich the base 60 from both sides in the left-right direction. The pair of batten members 62 extend so as to narrow the left-right distance between them as they move forward. The pair of batten members 62 each extend in the horizontal direction. The batten members 62 are connected to the lower surface of the top plate 2 so as to be immovable relative to each other. The pair of rail members 62 support the tabletop 2 from its rear end to its front end. The connecting portion 25 extends in the left-right direction and is joined to the pair of rail members 62. The support frame 8 is interposed between the tabletop 2 and the extendable portion 6 such that the tabletop 2 is cantilever-supported by the extendable portion 6 in the direction along the longitudinal direction of the tabletop 2 (forward in this embodiment) because the base portion 60 joined to the extendable portion 6 is positioned at a position closer to the rear end of the support frame 8.

[0038] As shown in FIG. 2 and FIG. 6, the entire storage housing 4 is installed on the floor panel P. The storage housing 4 is directly fixed to the floor panel P. However, the storage housing 4 may not be directly fixed to the floor panel P, but may be simply grounded via a grounding member such as an adjuster (not shown). When the storage housing 4 is fixed to the floor panel P, it is desirable to fix a portion of the storage housing 4 that is separated in the left-right direction from a through-hole portion 76 (described later) to the floor panel P. The storage housing 4 is indirectly supported on the foundation floor B via a base structure 5. The storage housing 4 is formed in a hollow rectangular parallelepiped shape. The storage housing 4 is formed long in the left-right direction. The storage housing 4 includes a bottom wall 70 that forms the bottom surface of the storage housing 4, a top wall 72 that forms the top surface of the storage housing 4, and a rear wall 74 that forms the rear surface of the storage housing 4. The rear wall 74 is provided detachably.

[0039] FIG. 7 is a perspective view of the liftable tabletop fixture 1 according to the embodiment, showing a state in which a part of the storage housing 4 is removed from the liftable tabletop fixture 1 shown in FIG. As shown in FIG. 6 and FIG. 7, the storage housing 4 has a through-hole 76 through which the support structure 3 is inserted in the up-down direction. The through-hole 76 penetrates the storage housing 4 in the up-down direction. The through-hole 76 opens upward at the top surface of the storage housing 4 and opens downward at the bottom surface of the storage housing 4. The through-hole 76 positions the upper end of the base structure 5 below the top wall 72 and causes the expansion and contraction part 6 and the cover 7 to protrude upward from the top wall 72. The through-hole 76 is opened backward by removing or moving a part of the panels of the storage housing 4. In this embodiment, the through-hole 76 is opened backward by removing the rear wall 74 and the auxiliary panel 72a (see FIG. 2) that forms a part of the top wall 72. As a result, the support structure 3 is disposed inside the through-hole 76 of the storage housing 4 by moving the storage housing 4 from which the rear wall 74 and the auxiliary panel 72a have been removed backward toward a predetermined installation position with the base structure 5 and the expansion and contraction part 6 installed on the floor.

[0040] The storage housing 4 includes surrounding portions 78, 79 that define the through portion 76 from the horizontal outside. The surrounding portions 78, 79 include a front surrounding portion 78 that faces the base structure 5 and the expandable portion 6 from the front, and a pair of left and right side surrounding portions 79 that face the base structure 5 and the expandable portion 6 from both the left and right sides. These surrounding portions 78, 79 extend in the vertical direction between the bottom wall 70 and the top wall 72. The second connecting portion 32 of the bracket 30 of the base structure 5 is connected to each side surrounding portion 79. The side surrounding portions 79 are connected to the bracket 30 by fastening or the like so as to be detachable. The cover 7 moves up and down inside the surrounding portions 78, 79 as the top plate 2 rises and falls.

[0041] As described above, the tabletop lifting fixture 1 of this embodiment includes a support structure 3 fixed to the floor and a tabletop 2 supported by the support structure 3 so as to be movable up and down. The support structure 3 includes a base structure 5 having a base plate 10 fastened to the floor, and an expandable section 6 connected to the base structure 5 in an upright state and formed to be expandable and contractable in the up and down direction between the tabletop 2 and the base structure 5. The base structure 5 includes an upper plate section 16 having a support surface 15a on which the expandable section 6 is placed. The expandable section 6 includes a lower flange 43 placed on the support surface 15a. According to this configuration, the expandable section 6, which is separate from the base structure 5, is connected to the base structure 5 fixed to the floor by the base plate 10 in an upright state, so that the work of fixing the base structure 5 to the floor can be easily performed without being affected by the load of the expandable section 6. Furthermore, since the extension / contraction section 6 is placed on the support surface 15a of the upper plate section 16 of the base structure 5, it is possible to omit adjustment of the vertical position of the extension / contraction section 6 relative to the base structure 5 when connecting the extension / contraction section 6 to the base structure 5. This also makes it easier to install the extension / contraction section 6 relative to the base structure 5. This makes it possible to provide a tabletop lifting fixture 1 that is easy to install.

[0042] The upper plate portion 16 and the lower flange 43 are connected to each other. With this configuration, the expandable portion 6 can be firmly attached to the mounting surface 15a. Therefore, the expandable portion 6 can be more firmly connected to the base structure 5.

[0043] The extendable portion 6 has a protruding portion 43a that is provided on the lower flange 43, protrudes in a direction perpendicular to the up-down direction, and is connected to the upper plate portion 16. With this configuration, the lower surface of the protruding portion 43a can be opposed to the mounting surface 15a of the base structure 5 from above. Since a space is formed above the protruding portion 43a, the work of connecting the lower flange 43 including the protruding portion 43a to the upper plate portion 16 of the base structure 5 can be easily performed from above. Therefore, the workability during installation can be further improved.

[0044] The upper plate portion 16 is located above the base plate 10, and downward displacement is restricted. With this configuration, since the upper plate portion 16 is located above the base plate 10, the height of the support surface 15a can be set to a height close to the floor surface F of the floor panel P of the double floor after the base plate 10 is fastened to the foundation floor B of the double floor.

[0045] In the above embodiment, the upper plate portion 16 is restricted from being displaced downward, so that the vertical position of the receiving surface 15a cannot be changed. However, the base may be formed so that the vertical position of the receiving surface can be changed. For example, the base may be connected to the base plate 10 by fastening, and the fastening position in the vertical direction on the base plate 10 or the fastening position in the vertical direction on the base may be changed. In addition, a plurality of types of bases with different heights of the receiving surface may be prepared in advance, and a base may be selected and connected to the base plate 10 according to the specifications of the installation location of the lifting table fixture. By forming the base so that the position of the receiving surface in the vertical direction can be changed in this way, the base plate 10 is fastened to the foundation floor B of the double floor, and the height of the receiving surface can be set to a height close to the floor surface F of the floor panel P of the double floor in accordance with the height of the floor panel P of the double floor.

[0046] The present invention is not limited to the above-described embodiment explained with reference to the drawings, and various modifications are possible within the technical scope of the present invention. For example, in the above embodiment, the support structure 3 is fixed to the foundation floor B, but the support structure 3 may also be fixed to the upper floor panel P of a double floor, or to a single floor.

[0047] In the above embodiment, the telescopic section 6 is provided with a protruding portion 43a that protrudes in the horizontal direction, but this configuration is not limited to this. The protruding portion may protrude in a direction intersecting the vertical direction, for example, in a direction inclined relative to the horizontal direction. In addition, in the above embodiment, the protruding portion 43a is provided over the entire outer periphery of the lower flange 43, but the protruding portion may be provided only in a partial area around the lower end of the telescopic section. For example, it is also possible to fix one side of an L-shaped metal fitting to the outer periphery of the lifting unit of the telescopic section, so that the other side becomes the protruding portion.

[0048] In the above embodiment, the support frame 8 is a separate component from the tabletop 2 . However, the support frame 8 may be included in the tabletop 2 as a component.

[0049] In addition, the components in the above-described embodiments can be replaced with well-known components as appropriate without departing from the spirit of the present invention. [Explanation of symbols]

[0050] 1...Lift-top display unit 2...Top 3...Support structure 5...Base structure (ground contact portion) 6...Extendable portion 10...Base plate (fixed portion) 16...Upper plate portion (mounted portion) 15a...Placement surface 43...Lower flange (mounted portion) 43a...Protruding portion

Claims

1. a support structure fixed to the floor; A top plate supported on the support structure so as to be liftable and lowerable, The support structure includes: A grounding part having a fixed part fastened to the floor; an expandable portion that is connected to the ground portion in an upwardly standing state and is formed to be expandable and contractable in the vertical direction between the top plate and the ground portion; Equipped with The grounding portion includes an attachment portion having a mounting surface on which the expandable portion is placed, The expandable portion includes an attachment portion that is placed on the mounting surface. Display rack with liftable top.

2. The attached portion and the attachment portion are connected to each other. A liftable display fixture as described in claim 1.

3. The stretchable portion is provided on the mounting portion, and has a protruding portion that protrudes in a direction intersecting the up-down direction and is connected to the mounting portion. A liftable display fixture as described in claim 2.

4. The mounting portion is located above the fixed portion and is restricted from being displaced downward. A display unit with a liftable top as described in any one of claims 1 to 3.

5. The mounting portion is formed so that the position of the mounting surface in the vertical direction can be changed. A display unit with a liftable top as described in any one of claims 1 to 3.

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