Top plate lifting / lowering furniture

Abstract

To provide top plate lifting / lowering furniture capable of supporting a top plate robustly through a telescopic part.SOLUTION: Top plate lifting / lowering furniture includes: a support structure 3 fixed on a base floor; and a top plate supported so as to be lifted / lowered by the support structure 3. The top plate has a rear end part side area located between a center of gravity and a rear end part in a front / rear direction. The support structure 3 includes: a base structure 5 fixed on the base floor; a telescopic part 6 having a lower part supported by the base structure 5 and an upper part supporting the rear end part side area 2r of the top plate 2; and a fastening member 8 fixing the base structure 5 on the base floor. The support structure 3 supports the top plate in a cantilever manner in a state that a front end part of the top plate floats from the base floor.SELECTED DRAWING: Figure 4

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 formed to be expandable and contractable in the vertical direction, and is provided with a support structure that is fixed to the floor surface and supports the tabletop. In some cases, the support structure of a lifting tabletop fixture is formed so that it supports the tabletop in a cantilever manner (see, for example, Patent Document 1). Patent Document 1 discloses a table that has lifting legs that raise and lower the tabletop in conjunction with the expansion and contraction movement in the vertical direction, and is provided with a support structure that supports the tabletop in a cantilever manner from below.

[0004] In a lifting table fixture with a cantilevered tabletop, a moment load due to the weight of the tabletop acts on the extension section. In the table described in Patent Document 1, a moment load that tries to push down the tip of the tabletop due to the weight of the tabletop acts mainly on the connection section between the tabletop and the extension section. This moment load tries to push up the base end of the tabletop. In the table described in Patent Document 1, the base end of the tabletop is held by support legs that extend in the vertical direction, and the support legs maintain the stability of the tabletop as it rises and falls while resisting the moment load. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2021-137270 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the case of conventional furniture with liftable tops, taking into account constraints such as design and installation location, there is room for improvement in the structure to resist the moment load acting on the extension part in order to robustly support the top via the extension part.

[0007] Therefore, the present invention provides a furniture with a liftable top that can firmly support the top via an extension section. [Means for solving the problem]

[0008] A first aspect of the present invention provides a lifting tabletop fixture comprising a support structure fixed to a floor and a tabletop supported on the support structure so that it can be raised and lowered, the tabletop having a center of gravity, a first end and a second end in a horizontal first direction, and a first end side region located between the center of gravity and the first end in the first direction, the support structure comprising a grounding portion fixed to the floor, an extendable portion having a lower portion supported by the grounding portion and an upper portion supporting the first end side region of the tabletop, and fastening members for fixing the grounding portion to the floor, and the support structure cantilever-supports the tabletop with the second end of the tabletop floating above the floor.

[0009] According to the first aspect, the telescopic part supports a part of the tabletop that is biased with respect to its center of gravity, causing a moment load due to the weight of the tabletop to act on the support structure, but since the grounding part of the support structure is fastened to the floor, the tabletop can be robustly supported while preventing the moment load acting on the support structure from being excessively transmitted to other parts of the tabletop lifting fixture. Moreover, because the tabletop and the grounding part are connected only by the telescopic part, the appearance of the tabletop lifting fixture can be simplified and the installation area can be reduced compared to a configuration in which the tabletop and base structure are connected by multiple members extending in the vertical direction.

[0010] A second aspect of the present invention relates to a lift-top display fixture of the first aspect described above, wherein the display fixture has a first length along the first direction and a second length along a horizontal second direction perpendicular to the first direction, the second length being smaller than the first length.

[0011] According to the second aspect, the tabletop is supported by the supporting structure so that it extends from the telescopic section along the first direction, which is its longitudinal direction, making the tabletop lifting fixture more suitable for achieving the above-mentioned effects compared to a configuration in which the second length of the tabletop is greater than the first length.

[0012] A third aspect of the present invention is a lift-top display fixture according to the first or second aspect above, wherein the top has a top body forming the upper surface of the top and a support frame supporting the top body along the first direction, and the extension portion may be connected to the support frame.

[0013] According to the third aspect, the moment resulting from the weight of the tabletop body can be supported by a long member, so that excessive concentration of the moment on the area directly above the extension section can be prevented.

[0014] A fourth aspect of the present invention is a lift-top display fixture according to the third aspect above, wherein the support frame in the lift-top display fixture may include a batten member extending along the first direction and connected to the tabletop body, and a plate-shaped base having a thickness in the vertical direction, connected opposite the upper end of the extension section, and connected to the batten member.

[0015] According to the fourth aspect, since the base is plate-shaped with a thickness in the vertical direction, the extension / contraction portion can be easily connected to the support frame with the upper end of the extension / contraction portion facing the base in the vertical direction.

[0016] A fifth aspect of the present invention is a lift-top display fixture according to the fourth aspect above, wherein the support frame has a plurality of batten members spaced apart in the second direction and an erection member extending along the second direction and erected between the plurality of batten members, and the base may connect the opposing inner surfaces of the plurality of batten members and the erection member.

[0017] According to the fifth aspect, the displacement of the crosspiece in a direction intersecting the longitudinal direction and the displacement of the installation member in a direction intersecting the longitudinal direction are restricted by the base, so that a highly rigid portion is formed by the base, the crosspiece, and the installation member. By connecting this portion to the expandable portion, a highly rigid connection structure is obtained.

[0018] A sixth aspect of the present invention is a lift-top display fixture according to any one of the first to fifth aspects above, wherein the grounding portion extends in a direction away from the second end along the first direction relative to the lower part of the extension portion, and may be provided with a reverse extension portion arranged along the floor and fastened to the floor by the fastening member.

[0019] According to the sixth aspect, when a moment load due to the weight of the tabletop acts on the support structure, a force is applied to the reverse direction extension portion in a direction that moves it away from the floor. Therefore, by fastening this reverse direction extension portion to the floor, the tabletop can be firmly fixed to the floor via the support structure.

[0020] A seventh aspect of the present invention is a lift-top display fixture according to the sixth aspect above, wherein the ground contact portion is positioned above the reverse direction extension portion, and further comprises an extension portion support portion connected to the lower portion of the extension portion so as not to be displaceable relative to the lower portion, and a connecting portion connecting the reverse direction extension portion and the extension portion support portion.

[0021] According to the seventh aspect, since a step is formed between the extension support and the reverse extension, the moment load acting on the support structure is less likely to be transmitted to the reverse extension, and therefore the tabletop can be more firmly fixed to the floor via the support structure.

[0022] An eighth aspect of the present invention is a lift-top display fixture according to the seventh aspect above, wherein the grounding portion further includes a secondary connecting portion extending from the connecting portion in a direction away from the second end along the first direction, and connected to the connecting portion and the reverse direction extension portion.

[0023] According to the eighth aspect, when a moment load due to the weight of the tabletop acts on the support structure, the secondary connection portion can restrict deformation of the connection portion that tends to move away from the reverse direction extension portion. Therefore, the support structure can suppress deformation, and the robustness of the support structure for the tabletop via the support structure can be ensured. Effect of the Invention

[0024] According to the present invention, it is possible to provide a furniture unit with a liftable top that can firmly support the top via an extension section. [Brief description of the drawings]

[0025] [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] FIG. 3 is a cross-sectional view taken along line III-III in FIG. [Figure 4] 2 is a perspective view of a base structure 5 and an expandable portion 6 according to the embodiment. FIG. [Diagram 5] FIG. 2 is a perspective view of a base structure 5 according to the embodiment. [Figure 6] FIG. 2 is a plan view of a base structure 5 and an expandable portion 6 according to the embodiment. [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. [Figure 8] 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

[0026] 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.

[0027] 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.

[0028] 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 display unit 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.

[0029] (Tabletop 2) The top plate 2 is formed in a flat plate shape extending in the horizontal direction. The top plate 2 has a first length along the front-rear direction and a second length along the left-right direction. The second length is smaller than the first length. As a result, the top plate 2 is formed long in the front-rear direction. The top plate 2 is disposed so as to protrude forward from the support structure 3 in a plan view. The top plate 2 includes a top plate main body 50 forming the upper surface thereof, and a support frame 55 disposed along the lower surface of the top plate main body 50.

[0030] The table top body 50 forms the entire table top 2 when viewed from above. That is, the above-mentioned first length and second length are defined in the table top body 50. Here, in the table top 2, a region located between the center of gravity G and the rear end of the table top 2 in the front-rear direction is defined as a rear end side region 2r (first step side region), and a region located between the center of gravity G and the front end of the table top 2 in the front-rear direction is defined as a front end side region 2f.

[0031] 2, the support frame 55 supports the tabletop main body 50 from below. The support frame 55 is made of metal. The support frame 55 includes a base 60 connected to the support structure 3, a pair of rail members 62 connected to the base 60 and extending along the longitudinal direction (front-rear direction) of the tabletop main body 50, and an installation member 64 installed between the pair of rail members 62.

[0032] FIG. 3 is a cross-sectional view taken along line III-III in FIG. As shown in Figs. 2 and 3, the entire base 60 is disposed in the rear end side region 2r. The base 60 is box-shaped and opens upward. The base 60 includes a bottom 60a extending substantially parallel to the top plate main body 50, upright portions 60b, 60c, 60d, and 60e rising upward from the periphery of the bottom 60a to form the side walls of the base 60, and a reinforcing portion 61 overlapping the bottom 60a. The bottom 60a is a plate material extending in the horizontal direction. The base 60 has a rectangular shape in plan view with a pair of sides extending in the left-right direction and the remaining pair of sides extending in the front-rear direction.

[0033] The standing parts 60b, 60c, 60d, and 60e are the front standing part 60b connected to the front edge of the bottom part 60a, the rear standing part 60c connected to the rear edge of the bottom part 60a, the left standing part 60d connected to the left edge of the bottom part 60a, and the right standing part 60e connected to the right edge of the bottom part 60a. For example, the left standing part 60d and the right standing part 60e are connected to the front standing part 60b and the rear standing part 60c, respectively. As a result, the standing parts 60b, 60c, 60d, and 60e extend continuously around the entire circumference of the bottom part 60a when viewed from above. However, the standing parts 60b, 60c, 60d, and 60e do not have to be connected to each other.

[0034] The reinforcing portion 61 is a plate material extending substantially parallel to the bottom portion 60a. The reinforcing portion 61 is formed slightly smaller than the bottom portion 60a in a plan view so as to fit inside the side wall of the base portion 60. The reinforcing portion 61 overlaps substantially the entire bottom portion 60a from above. The reinforcing portion 61 is fixed to the bottom portion 60a by welding, fastening, or the like. However, the reinforcing portion 61 may be omitted.

[0035] For example, the cross-section of the cross-section of the left-right direction is a rectangular tube. The cross-section of the ... The rail members 62 are disposed from the rear end region 2r to the front end region 2f. The rail members 62 extend in the front-rear direction so as to straddle the center of gravity G of the table top body 50, and support the table top body 50 from its rear end to its front end (see also FIG. 1).

[0036] For example, the installation member 64 is a rectangular tube that is elongated in a cross-sectional view in the front-rear direction. The installation member 64 extends in the left-right direction and is connected to a pair of crosspiece members 62. A plurality of installation members 64 are provided at intervals in the longitudinal direction of the tabletop body 50. The plurality of installation members 64 include a front installation member 65 disposed near the front end of the support frame 55 and a pair of rear installation members 66 disposed near the rear end of the support frame 55. The front installation member 65 connects the front ends of the pair of crosspiece members 62 to each other. The pair of rear installation members 66 are disposed at intervals from each other in the front-rear direction. The pair of rear installation members 66 are connected to the front standing portion 60b and the rear standing portion 60c of the base 60 in a one-to-one relationship. The installation member 64 is directly connected to the base 60 by welding to be integrated. However, the installation member 64 may be connected to the base 60 by a method other than welding, such as fastening. The pair of rear installation members 66 connect the pair of rail members 62 to each other at the front and rear of the base 60. The installation members 64 may also support the tabletop main body 50 from below.

[0037] The base 60 having the above configuration has the crosspiece 62 and the rear installation member 66 fixed to each other and integrated. As a result, the crosspiece 62 is restricted by the rear installation member 66 from displacing in a direction intersecting its length direction, and the rear installation member 66 is restricted by the crosspiece 62 from displacing in a direction intersecting its length direction. The integrated base 60, crosspiece 62, and rear installation member 66 function as a coupled part 68 coupled to the expandable part 6. In this embodiment, the coupled part 68 is the base 60, the pair of rear installation members 66, and a part of the crosspiece 62 that cooperates with the rear installation member 66 to surround the base 60. The coupled part 68 supports the tabletop body 50 by the crosspiece 62 at a position closer to the center of gravity G of the tabletop body 50 than the base 60 in the front-rear direction. Therefore, the fulcrum of the deflection of the tabletop body 50 is closer to the front than the base 60. In addition, the fore-and-aft position of the front rear installation member 66 of the pair of rear installation members 66 is a position overlapping the center of gravity G of the tabletop main body 50 when viewed from the up-down direction, or a position closer to the rear, but a position closer to the front than the front end of the upper flange 45 of the extension section 6 is preferable.

[0038] (Support structure 3) FIG. 4 is a perspective view of the base structure 5 and the expandable portion 6 according to the embodiment. 4, the support structure 3 includes a base structure 5 (grounding portion) fixed to a foundation floor B, an expansion section 6 connected to the base structure 5 in an upright state and formed to be expandable and contractible in the vertical direction, a cover 7 surrounding the expansion section 6, and a fastening member 8 for fastening the base structure 5 to the foundation floor B. The fastening member 8 is an anchor bolt embedded in the foundation floor B. The fastening member 8 may be configured such that a bolt is inserted from above into a female screw anchor embedded in the foundation floor B, or may be configured such that a nut is screwed from above onto a bolt protruding from the foundation floor B.

[0039] FIG. 5 is a perspective view of the base structure 5 according to the embodiment. 4 and 5, the base structure 5 includes a base plate 10, a base 15, a standing wall 20, a connector 25, and a bracket 30. The base structure 5 is made of metal.

[0040] 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 fastening members 8 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 fastening members 8.

[0041] 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.

[0042] 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 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 joint portion 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. At the four corners of the upper plate portion 16, a through hole is formed through which a fastening member such as a bolt is inserted. 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. Specifically, the lower end portions of the front plate portion 17f and the rear plate portion 17r are joined to the base plate 10 in the following manner. The lower end portion of the front plate portion 17f is provided with a front flange 17f1 extending forward along the upper surface of the base plate 10. The lower end portion of the rear plate portion 17r is provided with a rear flange 17r1 extending rearward along the upper surface of the base plate 10. The front flange 17f1 and the rear flange 17r1 are joined to the base plate 10. However, the joining structure between the front plate portion 17f and the rear plate portion 17r and the base plate 10 is not limited to this.

[0043] 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 vertical direction with a constant width with the front and back sides facing the front and back directions. The lower part of the front wall 21 is disposed along the rear plate portion 17r of the base 15. The front wall 21 is directly connected to the base 15 by welding or the like. Specifically, the front wall 21 located at the lower part of the standing wall 20 is connected to the rear edge of the upper plate portion 16 of the base 15 and both left and right side edges of the rear plate portion 17r of the base 15. 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 the side edges extending in the vertical direction of the front wall 21. The rear edges of each side wall 22 extend forward from its lower end toward the upper side so as to approach the front wall 21. The lower edges of each side wall 22 are connected to the base plate 10 and the base 15. Specifically, the lower edges of each side wall 22 are connected to the upper surface of the rear flange 17r1 of the rear plate portion 17r of the base 15 and to a portion of the upper surface of the base plate 10 that is located rearward of the rear flange 17r1. 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.

[0044] The connector 25 is disposed above the base 15 and fixed to the standing wall 20. The connector 25 connects the stretchable portion 6 connected to the base 15 and the standing wall 20. The connector 25 is disposed at a distance in the vertical direction from the placement surface 15a of the base 15. The connector 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 connection 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 from 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 connection portions 27 are each formed in a flat plate shape. The pair of connection 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.

[0045] 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 connector 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.

[0046] As shown in FIG. 4, 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 horizontally 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 (lower part) located at the lower end of the telescopic unit 6, and an upper flange 45 (upper part) located at the upper end of the telescopic unit 6.

[0047] Fig. 6 is a plan view of the base structure 5 and the expandable portion 6 according to the embodiment. Note that Fig. 6 shows a state in which the upper flange 45 of the expandable portion 6 has been removed. As shown in FIG. 4 and FIG. 6, 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.

[0048] As shown in FIG. 4, the lower flange 43 is connected to the lower end of the lifting unit 40 and is supported by the base structure 5. 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.

[0049] 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.

[0050] 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 horizontally. The upper flange 45 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 upper flange 45 displaces in the up-down direction as the lifting unit 40 expands and contracts. The upper flange 45 is connected to the joint portion 68 of the support frame 55 so as not to be displaceable relative to the joint portion 68. More specifically, the upper flange 45 overlaps the bottom portion 60a of the base portion 60 from below and is connected to the bottom portion 60a by fastening or the like. In this case, the upper flange 45 may also be fastened to the reinforcing portion 61, sandwiching the bottom portion 60a between the upper flange 45 and the reinforcing portion 61.

[0051] The extendable portion 6 is connected to the base portion 60, and thereby supports only the rear end region 2r of the tabletop 2. The extendable portion 6 supports the tabletop 2 in a cantilever manner with its front end portion floating above the floor surface F.

[0052] The extension section 6 passes between the standing wall 20 and the connecting body 25 and stands on the base 15. The upper flange 45 is located above the connecting body 25. The outermost cylindrical body 41 of the lifting unit 40 is connected to the front part 26 of the connecting body 25 so that it cannot move relative to the standing wall 20. As a result, the extension section 6 is connected to the standing wall 20 via the connecting body 25. The extension section 6 is not in contact with any part of the base structure 5 other than the base 15 and the front part 26 of the connecting body 25.

[0053] 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. 7, 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 body 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 body 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.

[0054] Here, the shape of the base structure 5 will be described based on the positional relationship with the top plate 2, the expandable portion 6, and the foundation floor B. The base structure 5 includes a reverse direction extending portion 81, a forward direction extending portion 82, an expandable portion supporting portion 83, a first connecting portion 85 (connecting portion), a second connecting portion 86, and a sub-connecting portion 87.

[0055] The reverse direction extension portion 81 and the forward direction extension portion 82 are disposed along the foundation floor B. The reverse direction extension portion 81 extends in a direction away from the front end of the top plate 2 (i.e., rearward) along the front-rear direction with respect to the lower flange 43 of the telescopic portion 6. In this embodiment, the reverse direction extension portion 81 is the rear portion of the base plate 10 and the rear flange 17r1 of the rear plate portion 17r of the base 15. A pair of corner portions of the rear portion of the base plate 10 of the reverse direction extension portion 81 are fastened to the foundation floor B by fastening members 8. The forward direction extension portion 82 extends in a direction approaching the front end of the top plate 2 (i.e., forward) along the front-rear direction with respect to the lower flange 43 of the telescopic portion 6. In this embodiment, the forward direction extension portion 82 is the front portion of the base plate 10 and the front flange 17f1 of the front plate portion 17f of the base 15. A pair of corner portions of the front portion of the base plate 10 of the forward direction extension portion 82 are fastened to the foundation floor B by fastening members 8.

[0056] The extension section support portion 83 is disposed above the reverse direction extension portion 81 and the forward direction extension portion 82, and is connected to the lower flange 43 of the extension section 6 so as not to be displaceable relative to the lower flange 43. In this embodiment, the extension section support portion 83 is the upper plate portion 16 of the base 15.

[0057] The first connecting portion 85 connects the reverse direction extending portion 81 and the expandable portion support portion 83. In this embodiment, the first connecting portion 85 is the rear plate portion 17r of the base 15 and the lower portion of the front wall 21 of the standing wall 20. The second connecting portion 86 connects the positive direction extending portion 82 and the expandable portion support portion 83. In this embodiment, the second connecting portion 86 is the front plate portion 17f of the base 15.

[0058] The sub-connecting portion 87 extends in the front-rear direction from the first connecting portion 85 away from the front end portion of the tabletop 2 (rearward). The sub-connecting portion 87 is joined to the first connecting portion 85 and the reverse direction extending portion 81 so as to be immovable relative to each other.

[0059] (Storage housing 4) As shown in FIG. 2 and FIG. 7, 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.

[0060] FIG. 8 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. 7 and FIG. 8, the storage housing 4 is formed with a through-hole 76 through which the support structure 3 is inserted in the vertical direction. The through-hole 76 penetrates the storage housing 4 in the vertical 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.

[0061] 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.

[0062] As described above, the lifting tabletop fixture 1 of this embodiment comprises a support structure 3 fixed to a foundation floor B, and a tabletop 2 supported by the support structure 3 so as to be liftable. The tabletop 2 has a rear end region 2r located between the center of gravity G and the rear end in the front-rear direction. The support structure 3 comprises a base structure 5 fixed to the foundation floor B, an expandable section 6 having a lower flange 43 supported by the base structure 5 and an upper flange 45 supporting the rear end region 2r of the tabletop 2, and a fastening member 8 that fixes the base structure 5 to the foundation floor B. The support structure 3 cantilevers the tabletop 2 with the front end of the tabletop 2 floating above the foundation floor B. With this configuration, the extension / contraction section 6 supports a portion of the top plate 2 that is biased relative to its center of gravity G, causing a moment load due to the weight of the top plate 2 to act on the support structure 3, but because the base structure 5 of the support structure 3 is fastened to the foundation floor B, the top plate 2 can be robustly supported while preventing the moment load acting on the support structure 3 from being excessively transmitted to other portions of the lifting top plate fixture 1. Moreover, because the top plate 2 and the base structure 5 are connected only by the extension / contraction section 6, the appearance of the lifting top plate fixture 1 can be simplified and the installation area can be reduced compared to a configuration in which the top plate and base structure are connected by multiple members extending in the vertical direction.

[0063] The tabletop 2 has a first length along the front-to-rear direction and a second length along the left-to-right direction that is shorter than the first length. With this configuration, the tabletop 2 is supported by the support structure 3 so as to extend from the extendable section 6 along the front-to-rear direction, which is its longitudinal direction, so that the tabletop lifting fixture 1 can be made more suitable for achieving the above-mentioned effects, compared to a configuration in which the second length of the tabletop is longer than the first length.

[0064] The tabletop 2 has a support frame 55 that supports the tabletop main body 50 in the front-rear direction. The extension section 6 is connected to the support frame 55. With this configuration, the moment resulting from the weight of the tabletop main body 50 can also be supported by the support frame 55, which is a long member, so that excessive concentration of the moment on the area directly above the extension section 6 can be prevented.

[0065] The support frame 55 has a crosspiece member 62 that extends along the front-rear direction and is joined to the tabletop main body 50, and a plate-like base 60 that has a thickness in the vertical direction, is joined to the upper flange 45 of the extension / contraction section 6 in a state facing the crosspiece member 62. According to this configuration, since the base 60 is plate-like and has a thickness in the vertical direction, the extension / contraction section 6 and the support frame 55 can be easily joined together with the upper flange 45 and the base 60 of the extension / contraction section 6 facing each other in the vertical direction.

[0066] The support frame 55 has a pair of crosspiece members 62 spaced apart in the left-right direction, and an installation member 64 extending along the left-right direction and installed between the pair of crosspiece members 62. The base 60 connects the opposing inner surfaces of the pair of crosspiece members 62 and the installation member 64. With this configuration, the base 60 restricts the displacement of the crosspiece members 62 in a direction intersecting the longitudinal direction and the displacement of the installation member 64 in a direction intersecting the longitudinal direction, so that a highly rigid joinable portion 68 is formed by the base 60, the crosspiece members 62, and the installation member 64. By joining the joinable portion 68 to the expandable portion 6, a highly rigid joined structure is obtained.

[0067] Since the joinable part 68 has the square tubular crosspiece member 62 and the installation member 64, the square tubular crosspiece member 62 and the installation member 64 have additional height and thickness compared to when the joinable part is only a plate-like base. Therefore, the crosspiece member 62 and the installation member 64 function as parts for increasing the rigidity of the joinable part 68.

[0068] The base structure 5 includes a reverse direction extension portion 81 that extends in the front-to-rear direction relative to the lower portion of the expandable portion 6 in a direction away from the front end, is disposed along the foundation floor B, and is fastened to the foundation floor B by fastening members 8. According to this configuration, when a moment load due to the weight of the top plate 2 acts on the support structure 3, a force is applied to the reverse direction extension portion 81 in a direction that moves it away from the foundation floor B. Therefore, by fastening this reverse direction extension portion 81 to the foundation floor B, the top plate 2 can be firmly fixed to the foundation floor B via the support structure 3.

[0069] The base structure 5 further includes an extension section support section 83 that is disposed above the reverse direction extension section 81 and is connected to the lower part of the extension section 6 so as not to be displaceable relative to the extension section 6, and a first connecting section 85 that connects the reverse direction extension section 81 and the extension section support section 83. According to this configuration, a step is formed between the extension section support section 83 and the reverse direction extension section 81, so that the moment load acting on the support structure 3 is less likely to be transmitted to the reverse direction extension section 81. Therefore, the top plate 2 can be fixed to the foundation floor B more firmly via the support structure 3.

[0070] The base structure 5 further includes a sub-connecting portion 87 that extends from the first connecting portion 85 in the front-rear direction away from the front end portion, and is connected to the first connecting portion 85 and the reverse-direction extending portion 81. With this configuration, when a moment load due to the weight of the tabletop 2 acts on the support structure 3, the sub-connecting portion 87 can restrict deformation of the first connecting portion 85 that tends to move away from the reverse-direction extending portion 81. Therefore, the support structure 3 suppresses deformation, and the robustness of the support structure for the tabletop 2 via the support structure 3 can be ensured.

[0071] 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.

[0072] 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.

[0073] In the above embodiment, the stretchable portion 6 and the base structure 5 are provided as separate members and are joined together to form an integrated structure, but the present invention is not limited to this configuration. In other words, the stretchable portion and the base structure (grounding portion) may be integrated together so as not to be detached from each other.

[0074] In the above embodiment, the tabletop 2 is cantilevered at a location near one end in the longitudinal direction, but this is not limited to the above configuration. The tabletop may be cantilevered at a location near one end in the lateral direction. In other words, the second length of the tabletop defined in the above embodiment may be greater than the first length.

[0075] In the above embodiment, the entire base 60 of the support frame 55 in the tabletop 2 is disposed in the rear end region 2r, but the configuration of the tabletop is not particularly limited. The tabletop only needs to be supported by the extension / contraction section so that the moment load due to its own weight acts on the support structure. For example, the entire contact portion between the tabletop and the extension / contraction section may be horizontally shifted from the center of gravity of the tabletop. In the above embodiment, a portion of the base 60 of the support frame 55 may be disposed in the front end region 2f.

[0076] In the above embodiment, the support frame 55 of the tabletop 2 has the base 60 formed of a plate material, but the configuration of the base is not limited to this. The base may have at least one of a rod member that extends approximately parallel to the crosspiece members and connects the rear installation members to each other, and a rod member that extends approximately parallel to the installation members and connects a pair of crosspiece members to each other, instead of the plate material of the above embodiment. In this case, the upper end of the expandable portion 6 can be connected to an appropriately selected member from the crosspiece members, the installation members, and the rod member.

[0077] 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]

[0078] 1...Lift-top display unit 2...Top 2r...Rear end area (first end area) 3...Support structure 5...Base structure (ground contact portion) 6...Extendible portion 8...Fastening member 81...Reverse extension portion 83...Extendible portion support portion 85...First connecting portion (connecting portion) 87...Secondary connecting portion B...Foundation floor (floor) G...Center of gravity

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 top plate is Center of gravity and a first end and a second end in a horizontal first direction; a first end side region located between the center of gravity and the first end in the first direction; having The support structure includes: A grounding portion fixed to the floor; an expandable portion having a lower portion supported by the ground portion and an upper portion supporting the first end side region of the top plate; A fastening member that fastens the grounding portion to the floor; Equipped with The support structure cantilever-supports the tabletop in a state in which the second end of the tabletop is suspended above the floor. Display rack with liftable top.

2. The top plate is a first length along the first direction; a second length along a horizontal second direction perpendicular to the first direction, the second length being smaller than the first length; having A liftable display fixture as described in claim 1.

3. The top plate is A top plate body forming an upper surface of the top plate; a support frame that supports the tabletop body along the first direction; having The telescopic portion is coupled to the support frame. A liftable display fixture as described in claim 2.

4. The support frame includes: A rail member extending along the first direction and connected to the top plate body; A plate-shaped base portion having a thickness in the vertical direction, connected to an upper end portion of the expandable portion in an opposed manner, and connected to the crosspiece member; having A liftable display fixture as described in claim 3.

5. The support frame includes: A plurality of the crosspiece members arranged at intervals in the second direction; a bridge member extending along the second direction and bridged between the plurality of crosspiece members; having The base portion connects the opposing inner surfaces of the plurality of crosspiece members and the installation member to each other. A liftable display fixture as described in claim 4.

6. The grounding portion includes a reverse extension portion that extends in a direction away from the second end portion along the first direction relative to the lower portion of the expandable portion, is disposed along the floor, and is fastened to the floor by the fastening member. A liftable display unit as described in claim 1 or claim 2.

7. The ground portion is An extension section support portion that is disposed above the reverse direction extension portion and is connected to the lower portion of the extension section so as not to be displaceable relative to the lower portion of the extension section; A connecting portion connecting the reverse direction extension portion and the expansion / contraction portion support portion; Further comprising: A liftable display fixture as described in claim 6.

8. The ground portion further includes a sub-connecting portion extending from the connecting portion in a direction away from the second end portion along the first direction and coupled to the connecting portion and the reverse direction extending portion. A liftable display fixture as described in claim 7.

Images