Furniture with elevating top board

Abstract

To provide furniture with an elevating top board capable of suppressing, as much as possible, the oscillation of a covering member that moves up and down integrally with the top board.SOLUTION: Furniture with an elevating top board comprises an elevating device 10, a top board, and a covering member. The elevating device 10 includes fixed legs 11 and movable legs 12. The top board is connected to the movable legs 12. The covering member moves up and down together with the top board, and at least covers the outside of the movable legs in the width direction of the top board. The movable legs 12 include a movable leg body 16 held by the fixed legs 11 in a vertically movable manner, and a fixed block 18 continuous with the upper part of the movable leg body 16. The fixed block 18 has a covering connection portion 55 connected to the covering member at a position overlapping with the movable leg body 16 in the width direction. The fixed block 18 is directly or indirectly connected to the lower surface of the top board.SELECTED DRAWING: Figure 6

Description

[Technical field]

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

[0002] As a fixture with a top plate such as a desk device, a fixture with a liftable top plate that has a top plate that can be raised and lowered is known. In the fixture with a liftable top plate, the top plate is supported by a lifting device so that it can be raised and lowered. The lifting device has fixed legs that are grounded on the floor surface and movable legs that are held by the fixed legs so that they can be raised and lowered, and the top plate is fixed to the upper part of the movable legs.

[0003] For this type of furniture with a liftable top, we are considering adopting a structure in which a pair of lifting devices, which also serve as the legs of the furniture, are placed on both sides of the width of the top, and the periphery of each lifting device is covered with a cylindrical shielding member. In this case, it is desirable to configure the cylindrical shielding member with a lower shield that is grounded to the floor surface and an upper shield that is fixed to the underside of the top, and to always hide the lifting device from the outside by overlapping the upper and lower shields in the vertical direction.

[0004] Incidentally, there exists a furniture with a tabletop that has a pair of cylindrical panel legs arranged on both sides of the tabletop in the width direction and supports the tabletop with these panel legs. In such furniture with a tabletop, when the upper ends of the panel legs are fixed to the underside of the tabletop, a flange portion extending outward is provided at the top of the panel leg, and the flange portion is fixed to the underside of the tabletop by bolts or the like (for example, see Patent Document 1).

[0005] It is conceivable that this technique for fixing panel legs to a tabletop can be applied to the fixing portion of the upper shield to the tabletop of the above-mentioned furniture with a liftable tabletop. In this case, a flange portion is provided at the upper end of the cylindrical upper shield, and the flange portion is fixed to the underside of the top plate by bolting, etc. When this configuration is adopted, the upper shield always rises and falls integrally with the top plate, making it possible to suitably cover and conceal the upper region of the lifting device. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2010-099311 A Summary of the Invention [Problem to be solved by the invention]

[0007] However, in the above-mentioned furniture with a liftable top that uses the fixing technology of Patent Document 1, the upper shielding body is fixed to the underside of the top at a position that is horizontally far away from the center of gravity of the upper shielding body. For this reason, when the upper shielding body is, for example, a large cylindrical part that is long in the front-rear direction, the load of the upper shielding body acting on the center of gravity of the upper shielding body acts on the upper shielding body as a large moment centered on the fixed point of the flange part. In this case, the upper shielding body is likely to swing significantly with the flange part as a fulcrum. And when the upper shielding body is likely to swing, it can easily cause rattling noise and hinder smooth lifting and lowering operation. If the upper end of the upper shielding body is provided with multiple flanges extending in opposite directions, the upper shielding body can be stably fixed to the underside of the tabletop in a double-supported structure. However, when the lifting device, which also serves as the legs, and the upper shielding body are installed close to the widthwise end of the tabletop, it may not be possible to make the flanges extend outward in the widthwise direction of the tabletop due to the positioning of other components, such as decorative panels, installed on the outer side in the widthwise direction. In such a situation, the upper end of the upper shielding body cannot be fixed to the tabletop in a double-supported structure.

[0008] Therefore, the present invention aims to provide a fixture with a liftable top that can minimize the vibration of a shielding member that rises and falls integrally with the top. [Means for solving the problem]

[0009] In order to solve the above problems, the fixture with a liftable top according to the present invention employs the following configuration. In other words, the fixture with a liftable top of the present invention comprises a lifting device having fixed legs whose lower ends are grounded and movable legs that rise and fall relative to the fixed legs, a top connected to the movable legs, and a shielding member that rises and falls together with the top and shields at least the outside of the movable legs when the side of the top in the width direction away from the center of the top is the outside and the side close to the center of the top is the inside, and the movable legs have a movable leg body that is held on the fixed legs so that it can be raised and lowered, and a fixed block connected to the upper part of the movable leg body, and the fixed block has a shielding connection part that is connected to the shielding member at a position where it overlaps the movable leg body in the width direction, and is directly or indirectly connected to the underside of the top.

[0010] In the case of a fixture with a liftable top having this configuration, a fixed block is provided on the movable leg of the lifting device, and the fixed block is directly or indirectly connected to the top, and a shielding member is connected to the shielding connection part of the fixed block. The shielding connection part is connected to the shielding member at a position where it overlaps with the movable leg body of the movable leg in the width direction. As a result, the shielding member is supported on the movable leg body at a position close to the movable leg body that supports the load of the top and the shielding member. In other words, the center of gravity of the shielding member is located at a position close to the movable leg body. Therefore, when this configuration is adopted, the load of the shielding member acting on the center of gravity of the shielding member is less likely to act as a moment that swings the shielding member, making it possible to suppress the vibration of the shielding member as much as possible.

[0011] The movable leg body may have a columnar portion extending upward from the fixed leg and an inward arm portion extending inward in the width direction from an upper end of the columnar portion, and the fixed block may be provided with a cylindrical portion into which the inward arm portion is fixed in an interlocking state.

[0012] In this case, the inward arm portion of the movable leg body is fixed in a fitted state to the cylindrical portion of the fixed block, increasing the connection strength between the movable leg body and the fixed block, making it possible for the movable leg body to stably support the load of the shielding member acting on the center of gravity of the shielding member.

[0013] The shielding connection portion may be connected to the shielding member from above the shielding connection portion by a first fastening member, and the top plate may be positioned so as to cover an upper part of the first fastening member.

[0014] In this case, before the fixed block of the movable leg is connected to the tabletop, the shielding connection part of the fixed block can be easily connected to the shielding member from above by the first fastening member. Then, after the fixed block is connected to the tabletop, the top of the first fastening member is covered by the tabletop. This makes the first fastening member invisible from the outside, improving the external appearance. Therefore, when this configuration is adopted, the workability of assembling the shielding member can be improved, and the external appearance quality of the furniture with a liftable tabletop can be improved.

[0015] The fixing block may be connected to the underside of the top plate by a second fastening member from below the fixing block.

[0016] In this case, after connecting the shielding member to the shielding connection part of the fixed block of the movable leg, it becomes possible to easily connect the fixed block to the underside of the tabletop with the second fastening member. Therefore, when this configuration is adopted, it is possible to more easily connect the shielding member, the lifting device, and the tabletop.

[0017] The fixed block may have a flat plate portion that fits along the lower surface of the top plate, and the portion that is connected to the top plate and the shielding connecting portion may be provided on the flat plate portion.

[0018] In this case, the shielding member and the underside of the tabletop face each other across the flat portion of the fixed block, making it less likely for a gap to form between the upper surface of the shielding member and the tabletop, thereby making it possible to improve the appearance of the fixture with a lift-up tabletop.

[0019] The shielding member may comprise an outer shielding wall that shields the outside of the movable leg body in the width direction, an inner shielding wall that shields the inside of the movable leg body in the width direction and, together with the outer shielding wall, forms a storage space to accommodate the movable leg body, and a top wall connected to at least one of the outer shielding wall and the inner shielding wall so as to shield an upper portion of the storage space, and the shielding connection portion of the fixed block may be connected to the top wall.

[0020] In this case, the shielding member has a cylindrical shape having an outer shielding wall and an inner shielding wall, and the center of gravity of the shielding member is located inside the storage space surrounded by the outer shielding wall and the inner shielding wall. The shielding connecting portion of the fixed block is connected to the top wall that shields an upper part of the storage space. This makes it possible to position the center of gravity of the shielding member closer to the movable leg body. Therefore, when this configuration is adopted, it is possible to more reliably suppress the vibration of the shielding member. Effect of the Invention

[0021] In the furniture with a liftable top according to the present invention, the fixed block at the top of the movable leg is connected directly or indirectly to the top and is connected to the shielding member by the shielding connection part, and the shielding connection part is connected to the shielding member at a position where it overlaps with the movable leg body of the movable leg in the width direction. Therefore, the center of gravity of the shielding member is located in a position close to the movable leg body that supports the load of the shielding member. Therefore, when the furniture with a liftable top according to the present invention is used, it is possible to suppress as much as possible the vibration of the shielding member that rises and falls together with the top. [Brief description of the drawings]

[0022] [Figure 1] FIG. 2 is a perspective view of a fixture with a liftable top according to an embodiment. [Diagram 2] FIG. 2 is an exploded perspective view of a display unit with a liftable top according to an embodiment. [Diagram 3] FIG. [Figure 4] FIG. 4 is another perspective view of the leg unit according to the embodiment. [Diagram 5]5 is a cross-sectional view of the leg unit according to the embodiment, corresponding to the VV cross section of FIG. 4. [Figure 6] FIG. [Figure 7] FIG. 4 is another exploded perspective view of the leg unit according to the embodiment. [Figure 8] FIG. 4 is a perspective view of a portion of the leg unit according to the embodiment. [Figure 9] An enlarged view of part IX in Figure 2. [Figure 10] FIG. 4 is an exploded perspective view of a connection portion between a leg unit and a beam member according to an embodiment. [Figure 11] FIG. 2 is an exploded perspective view of a portion of the lifting device according to the embodiment. [Figure 12] 10 is a cross-sectional view of the furniture with a liftable top according to the embodiment, taken along line XII-XII in FIG. 9 . [Figure 13] 10 is a cross-sectional view of the furniture with a liftable top according to the embodiment, taken along line XIII-XIII in FIG. 9 . [Figure 14] 10 is a cross-sectional view of the furniture with a liftable top according to the embodiment, taken along line XIV-XIV in FIG. 9 . DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0024] FIG. 1 is a perspective view of a furniture unit 1 with a liftable top according to this embodiment, and FIG. 2 is an exploded perspective view of the furniture unit 1 with a liftable top. The furniture 1 with a liftable top comprises a pair of leg units 2 and a top 3 supported by the leg units 2. Each leg unit 2 is equipped with a lifting device 10 (see Figs. 7 and 8) described below for raising and lowering the top 3. The top 3 is formed in a generally rectangular shape that is long in one direction when viewed from above. The pair of leg units 2 are connected to the undersides of both ends of the top 3 in the direction in which it extends long. For ease of explanation, the direction in which the tabletop 3 extends along its length will be referred to as the "width direction," and the direction perpendicular to the vertical and width directions will be referred to as the "front-rear direction." Additionally, the "outside" in the width direction means the side away from the center of the tabletop 3, and the "inside" in the width direction means the side close to the center of the tabletop 3. Arrow Y pointing to the width direction, arrow X pointing to the front-rear direction, and arrow Z pointing to the vertical direction are indicated in appropriate positions in the drawings.

[0025] As shown in Fig. 2, the upper ends of the pair of leg units 2 are connected to each other by a pair of beam members 4 having a rectangular cylindrical shape extending along the width direction. The pair of beam members 4 are arranged parallel to each other and spaced apart in the front-rear direction in the central area of ​​the tabletop 3 in the front-rear direction. The pair of beam members 4 are fixed to the underside of the tabletop 3 and support the tabletop 3 from below together with the pair of leg units 2.

[0026] Additionally, fixed to the underside of the tabletop 3 at a position rearward of the beam member 4 are a front panel 5 for hiding the space below the tabletop 3 from the rear, and a pair of support plates 6 having a generally L-shaped cross section. A control unit 7 for raising and lowering the lifting device 10 in the leg unit 2, a power tap 8, and the like can be installed on each support plate 6. Reference numeral 9 in FIG. 2 denotes an operating device for controlling the height of the tabletop 3 through the control unit 7.

[0027] Fig. 3 is a perspective view of the leg unit 2 as viewed from the upper inside in the width direction, and Fig. 4 is a perspective view of the leg unit 2 as viewed from the upper outside in the width direction. Fig. 5 is a cross-sectional view of the leg unit 2 corresponding to the VV cross section of Fig. 4, and Figs. 6 and 7 are exploded perspective views of the leg unit 2. Also, Fig. 8 is a perspective view of the leg unit 2 with some parts removed. The left and right leg units 2 have the same structure. As shown in Figs. 7 and 8, the leg unit 2 includes a lifting device 10 that also serves as a leg body that supports the load of the tabletop 3. The lifting device 10 includes a fixed leg 11 whose lower end is grounded, a movable leg 12 that is held on the fixed leg 11 so that it can be raised and lowered, and an actuator (not shown) that raises and lowers the movable leg 12 relative to the fixed leg 11. In this embodiment, the actuator is configured by an electric motor. However, the actuator is not limited to an electric motor. The actuator may be, for example, a hydraulically driven type.

[0028] 8, the fixed leg 11 is formed in a square tube shape, and its lower end is fixed to a bottom wall plate 14 via an installation bracket 13. A plurality of grounding members 15 are attached to the lower surface of the bottom wall plate 14. The fixed leg 11 and the bottom wall plate 14 are grounded to the floor surface F of the facility via the grounding members 15.

[0029] The movable leg 12 includes a movable leg body 16 held by the fixed leg 11 so as to be movable up and down, and a fixed block 18 (fixed bracket) connected to the upper part of the movable leg body 16. The movable leg body 16 includes a columnar part 16A held by the fixed leg 11 and protruding upward from the fixed leg 11, and a flat rectangular inward arm part 16B extending inward in the width direction from the upper end of the columnar part 16A. A connector is provided on the end face of the inward arm part 16B in the extending direction for connecting wiring such as power lines and signal lines to the lifting actuator. The fixed block 18 is fixed integrally to the inward arm part 16B of the movable leg 12. In addition, the ends of the pair of beam members 4 and the upper part of a movable side shielding tube 19 (shielding member) described later can be connected to the fixed block 18. Furthermore, the lower surface of the top plate 3 is butted against the upper surface of the fixed block 18, and the top plate 3 is fixed in this state.

[0030] The leg unit 2 further includes a fixed-side shielding cylinder 20 (fixed-side shielding member) and a movable-side shielding cylinder 19 (movable-side shielding member) that cover the outer periphery of each lifting device 10. The lower end of the fixed-side shielding cylinder 20 is connected to the bottom wall plate 14 and is grounded on the floor surface F via a grounding member 15 on the lower surface of the bottom wall plate 14. The upper end of the movable-side shielding cylinder 19 is connected to the upper part (fixed block 18) of the movable leg 12 of the lifting device 10 and moves up and down together with the tabletop 3 connected to the fixed block 18 of the movable leg 12. The movable-side shielding cylinder 19 has a peripheral wall shape that is one size larger than the fixed-side shielding cylinder 20 and is fitted into the outer periphery of the fixed-side shielding cylinder 20 so as to be relatively movable in the vertical direction.

[0031] The fixed-side shielding cylinder 20 has an outer shielding wall 21 that shields the outer side of the fixed leg 11 and the movable leg body 16 of the lifting device 10 in the width direction, and an inner shielding wall 22 that shields the inner side of the fixed leg 11 and the movable leg body 16 in the width direction. The outer shielding wall 21 and the inner shielding wall 22 extend in the up-down direction and the front-rear direction, and the front edges are connected to each other, and the rear edges are also connected to each other. As a result, a long space in the front-rear direction is formed between the outer shielding wall 21 and the inner shielding wall 22. The outer shielding wall 21 is formed in a rectangular flat plate shape. In contrast, the inner shielding wall 22 has a central wall portion 22a that is arranged in the central region in the front-rear direction and faces the outer shielding wall 21 in parallel, and an inclined wall portion 22b that extends inclined outward in the width direction from the front edge and the rear edge of the central wall portion 22a, respectively. The extending ends of each inclined wall portion 22b are connected to the front edge portion and the rear edge portion of the outer shielding wall 21. The inclined wall portion 22b on the front-rear direction is inclined so that the space between it and the outer shielding wall 21 tapers forward. The inclined wall portion 22b on the rear side in the front-rear direction is inclined so that the space between it and the outer shielding wall 21 tapers backward. In this embodiment, the central wall portion 22a is detachable from the front and rear inclined wall portions 22b. In other words, by removing the central wall portion 22a, it is possible to access the inner space of the fixed side shielding cylinder 20. This makes it easy to perform maintenance of the lifting device 10.

[0032] 7 and 8, the upper end of the fixed-side shielding cylinder 20 is provided with a top wall 25 having an insertion hole 23 through which the fixed leg 11 of the lifting device 10 is inserted and a lightening hole 24. The top wall 25 is connected to or formed integrally with at least one of the outer shielding wall 21 and the inner shielding wall 22. The movable leg 12 of the lifting device 10 protrudes above the fixed-side shielding cylinder 20 through the insertion hole 23 together with the fixed leg 11.

[0033] The movable-side shielding cylinder 19 has an outer shielding wall 26 that shields the outer side in the width direction of the fixed leg 11 and the movable leg body 16 of the lifting device 10, and an inner shielding wall 27 that shields the inner side in the width direction of the fixed leg 11 and the movable leg body 16. The outer shielding wall 26 and the inner shielding wall 27 extend in the vertical and front-rear directions like the fixed-side shielding cylinder 20, and the front end edges are connected to each other, and the rear end edges are also connected to each other. Between the outer shielding wall 26 and the inner shielding wall 27, a storage space 28 that stores the fixed leg 11 and the movable leg body 16 is formed. The movable-side shielding cylinder 19 is displaced above the fixed leg 11 when the top board 3 is raised, but even at this time, the columnar portion 16A of the movable leg body 16 is positioned (stored) in the storage space 28.

[0034] The outer shielding wall 26 and the inner shielding wall 27 of the movable side shielding cylinder 19 are formed in substantially the same shape as the outer shielding wall 21 and the inner shielding wall 22 of the fixed side shielding cylinder 20 described above. That is, the outer shielding wall 26 is formed in a rectangular flat plate shape, and the inner shielding wall 27 has a central wall portion 27a and a pair of inclined wall portions 27b. However, the outer shielding wall 26 and the inner shielding wall 27 of the movable side shielding cylinder 19 are formed to be one size larger than the outer shielding wall 21 and the inner shielding wall 22 of the fixed side shielding cylinder 20. In addition, a rectangular opening 30 that opens upward is formed at the upper end of the central wall portion 27a of the inner shielding wall 27. The extending end side of the inward arm portion 16B of the movable leg body 16 is inserted into this opening 30.

[0035] 7, a top wall 29 that closes a portion of the upper part of the accommodation space 28 is provided at the upper end of the movable-side shielding cylinder 19. The top wall 29 is not provided in the central area in the front-rear direction above the accommodation space 28, but is provided at the front and rear of that central area. From an opening between the front and rear top walls 29, the upper surface of the base side of the inward arm portion 16B of the movable leg body 16 is exposed. The front and rear top walls 29 are connected to or integrally formed with at least one of the outer shielding wall 26 and the inner shielding wall 27.

[0036] Incidentally, as shown in Fig. 5, a minute gap d is provided between the opposing side surfaces 20s, 19s of the fixed-side shielding cylinder 20 and the movable-side shielding cylinder 19 to allow the movable-side shielding cylinder 19 to move in the vertical direction. A nonwoven fabric 31 capable of compressive deformation in the direction narrowing the gap d is disposed between these side surfaces 20s, 19s. The nonwoven fabric 31 is an example of a cushioning material capable of compressive deformation in the direction narrowing the gap d. Felt or other expandable sliding materials can also be used as a cushioning material capable of compressive deformation in the direction narrowing the gap d.

[0037] In the present embodiment, the nonwoven fabric 31, which is a cushioning member, is formed in a horizontally long rectangular shape as shown in Fig. 4 and Fig. 7. The nonwoven fabric 31 is bonded to the upper end area of ​​the outer side surface 20s of the outer shielding wall 21 and the inner shielding wall 22 of the fixed side shielding cylinder 20, and to the lower end area of ​​the inner side surface 19s of the outer shielding wall 26 and the inner shielding wall 27 of the movable side shielding cylinder 19. The arrangement of the nonwoven fabric 31 in the fixed side shielding cylinder 20 and the arrangement of the nonwoven fabric 31 in the movable side shielding cylinder 19 are not limited to this example. The arrangement of the nonwoven fabric 31 in the fixed side shielding cylinder 20 may be in an upper area above the vertical center position of the side surface 20s of the fixed side shielding cylinder 20, and the arrangement of the nonwoven fabric 31 in the movable side shielding cylinder 19 may be in a lower area below the vertical center position of the side surface 19s of the movable side shielding cylinder 19.

[0038] 4, the nonwoven fabric 31 attached to the outer side surface 20s of the outer shielding wall 21 of the fixed-side shielding cylinder 20 and the nonwoven fabric 31 attached to the inner side surface 19s of the outer shielding wall 26 of the movable-side shielding cylinder 19 are arranged in positions that do not overlap each other in the vertical direction. Similarly, as shown in Fig. 7, the nonwoven fabric 31 attached to the outer side surface 20s of the inner shielding wall 22 of the fixed-side shielding cylinder 20 and the nonwoven fabric 31 attached to the inner side surface 19s of the inner shielding wall 27 of the movable-side shielding cylinder 19 are arranged in positions that do not overlap each other in the vertical direction. In other words, all of the nonwoven fabrics 31 attached to the mutually opposing side surfaces 20s, 19s are arranged in positions that are shifted in the front-rear direction. In this embodiment, a portion of the nonwoven fabric 31 is attached to the opposing side surfaces 20s, 19s of the inclined wall portions 22b, 27b of the inner shielding walls 22, 27. The nonwoven fabric 31 attached to the side surfaces 20s, 19s of the inclined wall portions 22b, 27b is also shifted forward and backward so as not to overlap in the vertical direction.

[0039] Fig. 9 is an enlarged view of part IX in Fig. 2, and Fig. 10 is an exploded perspective view of a connection portion between the leg unit 2 and the beam member 4. Fig. 11 is an exploded perspective view of a connection portion between the movable leg body 16 and the fixed block 18 of the lifting device 10. Fig. 12 is a cross-sectional view corresponding to the XII-XII cross section in Fig. 9, Fig. 13 is a cross-sectional view corresponding to the XIII-XIII cross section in Fig. 9, and Fig. 14 is a cross-sectional view corresponding to the XIV-XIV cross section in Fig. 9. The fixed block 18 of the movable leg 12 comprises a square cylindrical base tube 32 into which the inward arm portion 16B of the movable leg body 16 is fitted, and a pair of square cylindrical beam connecting portions 33 fixed to each of the outer side surfaces of the base tube 32 in the fore-and-aft direction.

[0040] The base cylinder 32 has a horizontally extending top wall 32t, left and right side walls 32s, and a bottom wall 32b extending horizontally parallel to the top wall 32t. The top wall 32t, the side walls 32s, and the bottom wall 32b form a square tube shape of the base cylinder 32 that opens to the outside and inside in the width direction (Y direction). The inward arm portion 16B of the movable leg body 16 is fitted into the base cylinder 32 through an opening 35 (see FIG. 11) facing outward in the width direction. In this state, the inward arm portion 16B is fixed integrally to the base cylinder 32 by bolting or the like. In this embodiment, the base cylinder 32 constitutes a cylindrical portion into which the inward arm portion 16B is fitted and fixed.

[0041] 11, the front and rear side walls 32s of the base cylinder 32 extend outward in the width direction (Y direction) further than the bottom wall 32b. A top horizontal wall 34, which will be described later, is fixed to the upper surface of the top wall 32t by welding. The base side of the inward arm portion 16B (the area directly above the columnar portion 16A) is accommodated and positioned in the space surrounded by the top wall 32t and the front and rear side walls 32s.

[0042] The beam connecting portion 33 is formed of a square tube-shaped member whose outer surface shape is one size smaller than the beam member 4. One side of the beam connecting portion 33 is fixed to the outer surface (surface facing the front-rear direction) of the side wall 32s of the base tube 32 by welding. The beam connecting portion 33 is fixed to the base tube 32 so that its extension direction is along the width direction (Y direction). Only the central region in the up-down direction of the side of the beam connecting portion 33 facing the outer surface of the base tube 32 is welded to the outer surface of the base tube 32. A gap is provided between the outer surface of the base tube 32 and the side of the beam connecting portion 33 so as to be located above and below the welded portion between the two.

[0043] On the other hand, at the end of the beam member 4, at a position facing the outer surface of the side wall 32s of the base tube 32, a notch 40 of a substantially constant width that opens toward the outside in the width direction (Y direction) is formed as shown in Figs. 10, 13, and 14. This notch 40 is for preventing the beam member 4 from interfering with the welded portion between the base tube 32 and the beam connecting portion 33 when the end of the beam member 4 is fitted to the outer peripheral surface of the beam connecting portion 33 along the width direction (Y direction). The beam member 4 is fitted to the outer surface of the beam connecting portion 33 in an area other than the welded portion between the base tube 32 and the beam connecting portion 33. Almost the entire outer surface of the beam connecting portion 33 except for the welded portion with the base tube 32 becomes the fitting allowance 70 into which the end of the beam member 4 is fitted. Also, the edge of the notch 40 of the beam member 4 is inserted into the gap between the base tube 32 and the beam connecting portion 33 above and below the welded portion.

[0044] The top horizontal wall 34 fixed to the upper surface of the top wall 32t of the base tube 32 is formed in a generally rectangular shape that is long in the front-rear direction. The top horizontal wall 34 extends a predetermined length to the front and rear sides from a central region fixed to the upper surface of the top wall 32t of the base tube 32. Here, if the portions extending to the front and rear sides from the central region are referred to as extension pieces 34e, each part of these extension pieces 34e is overlapped with the upper surface of the top wall 29 of the movable-side shielding tube 19.

[0045] Specifically, as shown in Fig. 9, the area of ​​each extension piece 34e, except for the vicinity of the corner near the inner side in the width direction (Y direction), on the extension end side (front-rear direction end side) is overlapped with the upper surface of the corresponding top wall 29 on the front and rear of the movable side shielding tube 19. The area of ​​each extension piece 34e overlapped with the upper surface of the top wall 29 is a shielding connection part 55 connected to each top wall 29 of the movable side shielding tube 19 (shielding member) by a plurality of screws 50. The screws 50 are fastened from the upper side of the shielding connection part 55 to fasten and fix the shielding connection part 55 to the top wall 29. At this time, the front and rear shielding connection parts 55 of the top horizontal wall 34 are connected to the movable side shielding tube 19 at a position overlapping the movable leg body 16 (columnar part 16A and inward arm part 16B) of the lifting device 10 in the width direction (Y direction). In this embodiment, the screw 50 constitutes the first fastening member. In addition, the head of the screw 50 fastened from above into the shielding connecting portion 55 is covered on the upper side by the top plate 3 when the fixing block 18 is connected to the lower surface of the top plate 3.

[0046] The vicinity of the corner of each extension piece 34e on the inner side in the width direction (Y direction) of the extension end side constitutes a top plate connecting portion 56 that is overlapped with the underside of the top plate 3 and connected to the top plate 3 by screws 51. These corners that constitute the top plate connecting portion 56 are located outside the side wall (inclined wall portion 27b) of the movable-side shielding cylinder 19 in top view. The screws 51 are fastened from below the top plate connecting portion 56, thereby fastening and fixing the top plate connecting portion 56 to the underside of the top plate 3. In this embodiment, the screw 51 constitutes a second fastening member. The top horizontal wall 34 constitutes a flat plate portion on which the top plate connecting portion 56 and the shielding connecting portion 55 are provided.

[0047] In addition, a first vertical wall 38A (vertical wall) is bent downward at a substantially right angle to the inner end of one of the extension pieces 34e of the top horizontal wall 34 in the width direction (Y direction). Similarly, a second vertical wall 38B (vertical wall) is bent downward at a substantially right angle to the inner end of the other extension piece 34e in the width direction (Y direction). The base ends of the first vertical wall 38A and the second vertical wall 38B on the center side in the front-rear direction are abutted against the outer surfaces of the front and rear side walls 32s of the base tube 32. The base ends of the first vertical wall 38A and the second vertical wall 38B are fixed by welding to the abutted side walls 32s.

[0048] The end faces of the beam connecting parts 33 mentioned above are abutted against the inner side faces in the width direction (Y direction) of the first vertical wall 38A and the second vertical wall 38B. The end faces of the beam connecting parts 33 are fixed to the side faces of the corresponding vertical walls (first vertical wall 38A, second vertical wall 38B) by welding. Therefore, the pair of beam connecting parts 33 are fixed to the base tube 32 at both front and rear positions of the base tube 32 (cylindrical part), and each end face is also fixed to the vertical walls (first vertical wall 38A, second vertical wall 38B).

[0049] In this embodiment, the first vertical wall 38A and the second vertical wall 38B, which are arranged spaced apart in the front and rear with the base tube 32 (cylindrical part) in between, are integrally connected to a top horizontal wall 34 that extends across the upper surface of the base tube 32 (cylindrical part) in the front-rear direction. The central area in the front-rear direction of the top horizontal wall 34 is welded and fixed to the upper part of the base tube 32 (outer extension part 32se). Therefore, the beam connecting part 33 to which each end of the pair of beam members 4 is connected is supported by the strong structural body of the fixed block 18.

[0050] The procedure for assembling the furniture with a liftable top 1 of this embodiment will be described below. Each leg unit 2 is assembled in advance. When assembling the leg unit 2, as shown in Fig. 7, the movable-side shielding cylinder 19 is fitted into the fixed-side shielding cylinder 20 from above, and in this state, the lifting device 10 is set inside from above the movable-side shielding cylinder 19. At this time, the lower end of the fixed leg 11 of the lifting device 10 is fixed to the upper surface of the bottom wall plate 14. Also, a part of the inward arm portion 16B at the upper part of the movable leg 12 is exposed to the outside of the movable-side shielding cylinder 19.

[0051] Thereafter, the base tube 32 of the fixed block 18 is fitted to the extending end of the inward arm portion 16B, and in this state, the base tube 32 is fixed to the inward arm portion 16B by screwing or the like. Further thereafter, the front and rear extending pieces 34e of the top horizontal wall 34 of the fixed block 18 are overlapped with the corresponding top wall 29 of the movable-side shielding tube 19, and the shielding connecting parts 55 of each extending piece 34e are fastened and fixed to the top wall 29 from above by the screws 50, which are first fastening members.

[0052] Once each leg unit 2 is assembled in this manner, each end of the pair of beam members 4 is then connected to the fixed block 18 of each leg unit 2. At this time, the ends of the cylindrical beam members 4 are fitted into the corresponding beam connecting portions 33 of the fixed block 18, and then each beam member 4 is fixed to the beam connecting portions 33 by bolting.

[0053] When the pair of beam members 4 are connected to the fixed blocks 18 of each leg unit 2 in this manner, a component arrangement space 60 that opens downward is formed between the pair of beam members 4, as shown in Fig. 6. In this manner, in the component arrangement space 60 formed between the pair of beam members 4, it becomes possible to arrange, for example, wiring for connecting the actuators in each lifting device 10 to the control unit 7 and a power source.

[0054] Thereafter, the tabletop 3 is placed on the upper surfaces of the pair of leg units 2 and the beam members 4, and these are fastened and fixed to the underside of the tabletop 3 by a plurality of screws 51, 52. When fastening and fixing the leg units 2 to the underside of the tabletop, the tabletop 3 is placed on the upper surface of the top horizontal wall 34 (flat portion) of the fixed block 18, and the tabletop connecting portion 56 of the top horizontal wall 34 (flat portion) is fastened and fixed from below by the screws 51, which are the second fastening members. At this time, the tabletop connecting portion 56 is disposed at a position protruding outward from the inner shielding wall 27 of the movable-side shielding cylinder 19, as shown in FIG. 9. Therefore, the work of fastening the screws 51 to the tabletop 3 can be performed relatively easily.

[0055] 2 are then fastened to the underside of the tabletop 3. However, the tabletop 5, support plate 6, etc. may be temporarily assembled to the pair of leg units 2 in advance, and then fastened to the underside of the tabletop 3 together with the leg units 2 and the beam members 4.

[0056] <Effects of the embodiment> As described above, in the furniture with a liftable top plate 1 of this embodiment, the fixed block 18 is provided on the movable leg 12 of the lifting device 10, and the fixed block 18 is provided with a top plate connecting part 56 connected to the underside of the top plate 3 and a shielding connecting part 55 connected to the movable side shielding tube 19 (shielding member). The shielding connecting part 55 is connected to the movable side shielding tube 19 (shielding member) at a position where it overlaps with the movable leg body 16 of the movable leg 12 in the width direction (Y direction). Therefore, the movable side shielding tube 19 (shielding member) is supported by the movable leg 12 at a position close to the movable leg body 16 that supports the load of the top plate 3 and the movable side shielding tube 19. Therefore, in the furniture with a liftable top plate 1 of this embodiment, the load of the movable side shielding tube 19 acting on the center of gravity of the movable side shielding tube 19 (shielding member) is less likely to act as a moment that swings the movable side shielding tube 19. Therefore, when the furniture with a liftable top 1 of this embodiment is adopted, it is possible to minimize the vibration of the movable shielding tube 19 (shielding member) which rises and falls integrally with the top 3.

[0057] In the furniture fixture 1 with a liftable top plate of this embodiment, the shielding connection part 55 of the fixed block 18 is connected to the movable-side shielding cylinder 19 at a position where it overlaps with the movable leg body 16 of the movable leg 12 in the width direction (Y direction). For this reason, the movable-side shielding cylinder 19 can be stably supported without providing a flange that protrudes outward in the width direction at the top of the movable-side shielding cylinder 19 (without using a double-support structure). Therefore, when the furniture fixture 1 with a liftable top plate of this embodiment is used, it is easy to ensure space for adding decorative panels and functional parts on the outside of the top plate 3 in the width direction (Y direction).

[0058] In addition, in the furniture with a liftable top 1 of this embodiment, the movable leg body 16 of the lifting device 10 has a columnar portion 16A extending upward from the fixed leg 11, and an inward arm portion 16B extending inward in the width direction (Y direction) from the upper end of the columnar portion 16A. A base cylinder 32 (cylindrical portion) is provided on the fixed block 18, and the inward arm portion 16B of the movable leg body 16 is fixed in a fitted state to the base cylinder 32. This allows the movable leg body 16 and the fixed block 18 to be connected with high connection strength. Therefore, when this configuration is adopted, the load of the movable side shielding cylinder 19 acting on the center of gravity of the movable side shielding cylinder 19 (shielding member) can be stably supported by the movable leg body 16.

[0059] Furthermore, in the furniture fixture 1 with a liftable top plate of this embodiment, the shielding connection part 55 of the fixed block 18 is connected to the movable-side shielding tube 19 from above by the screw 50, which is the first fastening member. Therefore, the fixed block 18 (top plate connection part 56) of the movable leg 12 can be easily connected to the movable-side shielding tube 19 from above by the screw 50 before being fixed to the top plate 3. Furthermore, in the furniture fixture 1 with a liftable top plate of this embodiment, when the fixed block 18 is connected to the top plate 3, the head of the screw 50 is covered from above by the top plate 3. Therefore, the screw 50, which is the first fastening member, is not visible from the outside, improving the appearance. Therefore, when this configuration is adopted, the workability of assembling the movable side shielding tube 19 (shielding member) can be improved, and the appearance quality of the fixture 1 with a liftable top plate can be improved.

[0060] Furthermore, in the furniture with a liftable top 1 of this embodiment, the top connection part 56 of the fixed block 18 is connected to the underside of the top 3 from below the top connection part 56 by the screw 51, which is the second fastening member. Therefore, after connecting the movable-side shielding tube 19 (shielding member) to the shielding connection part 55 of the fixed block 18, the top connection part 56 of the fixed block 18 can be easily connected to the underside of the top 3 by the screw 51. Therefore, when this configuration is adopted, the work of connecting the movable side shielding cylinder 19 (shielding member), the lifting device 10, and the top board 3 can be made easier.

[0061] In addition, in the furniture 1 with a liftable top plate of this embodiment, the fixed block 18 of the movable leg 12 is provided with a flat top horizontal wall 34 (flat portion) that fits along the underside of the top plate 3. A top plate connecting portion 56 that is connected to the top plate 3 and a shielding connecting portion 55 that is connected to the movable-side shielding cylinder 19 (shielding member) are provided on the top horizontal wall 34. For this reason, the upper surface of the movable-side shielding cylinder 19 and the underside of the top plate 3 face each other with the flat top horizontal wall 34 of the fixed block 18 in between. Therefore, when this configuration is adopted, a gap is less likely to form between the upper surface of the movable side shielding tube 19 (shielding member) and the lower surface of the tabletop 3, making it possible to improve the appearance of the fixture 1 with a liftable tabletop.

[0062] In addition, in the furniture with a liftable top 1 of this embodiment, a storage space 28 is formed by the outer shielding wall 26 and the inner shielding wall 27 of the movable-side shielding cylinder 19 (shielding member), and the movable leg body 16 is disposed in the storage space 28. A top wall 29 that closes an upper part of the storage space 28 is connected to at least one of the outer shielding wall 26 and the inner shielding wall 27. The shielding connection part 55 of the fixed block 18 is connected to the top wall 29 thus provided at the upper part of the movable-side shielding cylinder 19. Therefore, the movable-side shielding cylinder 19 (shielding member) has a cylindrical shape that surrounds the movable leg body 16 by the outer shielding wall 26 and the inner shielding wall 27, and the center of gravity of the movable-side shielding cylinder 19 is located inside the storage space 28 surrounded by the outer shielding wall 26 and the inner shielding wall 27. Therefore, it is possible to locate the center of gravity of the movable side shielding cylinder 19 closer to the movable leg main body 16. Therefore, when this configuration is adopted, it becomes possible to more reliably suppress the vibration of the movable side shielding cylinder 19 (shielding member).

[0063] The present invention is not limited to the above embodiment, and various design modifications are possible without departing from the gist of the present invention. For example, in the above embodiment, the fixed block 18 of the movable leg 12 of the lifting device 10 is configured as a separate part from the movable leg body 16 (the columnar portion 16A and the inward arm portion 16B). However, the fixed block 18 may be configured as an integral member with the movable leg body 16. Also, in the above embodiment, the movable side shielding cylinder 19 is arranged on the outside (outer circumference side) of the fixed side shielding cylinder 20 so as to be able to rise and fall, but conversely, the movable side shielding cylinder 19 may be arranged on the inside (inner circumference side) of the fixed side shielding cylinder 20 so as to be able to rise and fall.

[0064] In the above embodiment, the movable-side shielding tube 19 is used as a shielding member that covers the outside of the movable leg 12 of the lifting device 10, but the configuration of the shielding member is not limited to this. The shielding member does not necessarily have to be cylindrical, and may be anything that can at least shield the outside of the movable leg 12 in the width direction (Y) direction.

[0065] In addition, in the above embodiment, the top plate connecting portion 56, which is connected to the underside of the top plate 3 by the screw 51, is provided integrally with the fixed block 18, but the top plate connecting portion 56 does not necessarily have to be provided. For example, the fixed block 18 may be connected to the top plate 3 only via the beam member 4, which is fixed to the underside of the top plate 3 by the screw 52. In other words, the fixed block 18 may be indirectly connected via another member such as the beam member 4, rather than directly connected to the underside of the top plate 3.

[0066] Furthermore, in the above embodiment, the fixed side shielding cylinder 20 and the movable side shielding cylinder 19 are provided so as to always overlap each other in the vertical direction, but the fixed side shielding cylinder 20 (fixed side shielding member) is not necessarily required.

[0067] <Other inventions> Other inventions that can be extracted from the above-mentioned embodiment will be listed below together with their effects. Note that at the end of each component in the following appendix, the reference numerals of the corresponding parts in the above-mentioned embodiment are listed in parentheses. [Appendix 1] A top plate (3) and a pair of leg units (2) arranged apart from each other in a first direction (width direction) along the lower surface of the tabletop (3) and supporting the tabletop (3) from below so that the tabletop (3) can be raised and lowered; a beam member (4) extending along the first direction on the underside of the tabletop (3) and having both ends in the extending direction connected to the upper portions of each of the leg units (2); Each leg unit (2) is a lifting device (10) having a fixed leg (11) whose lower end is grounded and a movable leg (12) that moves up and down relative to the fixed leg (11); a fixed bracket (18) to which the upper end of the movable leg (12) is connected and which is fixed to the lower surface of the top plate (3); The fixing bracket (18) is a cylindrical portion (32) extending along the first direction and having an opening (35) open outward in the first direction into which an upper end of the movable leg (12) is fitted; a pair of beam connecting portions (33) fixed to the cylindrical portion (32) at both sides sandwiching the cylindrical portion (32) in a vertical direction and a second direction (front-rear direction) intersecting the first direction, The beam members (4) are provided in pairs, A display unit with a liftable top, characterized in that each end of a pair of beam members (4) is connected to a corresponding one of the beam connecting portions (33), thereby forming a component arrangement space (60) that opens downward between the pair of beam members (4).

[0068] In the furniture with a liftable top of Appendix 1, a pair of beam members are arranged at a distance in the second direction, and both ends of each beam member are connected to the beam connecting portion of the fixed bracket of each leg unit. In each leg unit, the upper end of the movable leg is fitted into the opening of the cylindrical portion of the fixed bracket and connected. Therefore, the load input from the top or above is supported by the pair of beam members and the fixed bracket of each leg unit. The load input to the fixed bracket of each leg unit is input to the movable leg connected in a fitted state to the cylindrical portion of the fixed bracket, and is supported on the floor surface via the movable leg and the fixed leg. At this time, since the upper end of the movable leg is connected in a fitted state to the cylindrical portion of the fixed bracket, the load can be received through a robust structural portion that is unlikely to deform under the input load. In addition, the beam members connecting the fixing brackets of a pair of leg units are spaced apart in the second direction, sandwiching the cylindrical portions of the fixing brackets, and form a component arrangement space between the beam members that opens downward. Therefore, by arranging components such as electrical wiring in this component arrangement space, maintenance work on the components can be easily performed without removing the fixing brackets and beam members from the tabletop. Therefore, when the furniture with a liftable top as described in Appendix 1 is adopted, the robustness of the top support part formed by the leg unit and beam member can be maintained while also improving the maintainability of components such as electrical wiring.

[0069] [Appendix 2] The display unit with a liftable top described in Appendix 1 is characterized in that the upper end of the movable leg (12) is provided with an inward arm portion (16B) that extends inward in the first direction and is inserted into the opening (35) of the cylindrical portion (32).

[0070] In the furniture with a liftable top of Appendix 2, the upper end of the movable leg can be easily and firmly attached to the cylindrical part by inserting the inward arm part extending inward in the first direction from the upper end of the movable leg into the opening of the cylindrical part. Therefore, when this configuration is adopted, the workability of assembling the movable leg to the fixed bracket can be improved and the connection strength of the movable leg can be increased.

[0071] [Appendix 3] The beam member (4) is composed of a hollow tubular member, The display unit with a liftable top described in Appendix 1 or Appendix 2, characterized in that the beam connecting portion (33) is a member having a fitting margin (70) into which the end of the beam member (4) is fitted along the second direction.

[0072] In the furniture with a liftable top of Appendix 3, the end of the beam member can be easily connected to the beam connecting part by moving the cylindrical beam member along the second direction and fitting it into the fitting gap of the beam connecting part. Therefore, when this configuration is adopted, the workability of assembling the beam member to the fixed bracket can be improved.

[0073] [Appendix 4] The fixed bracket (18) further includes vertical walls (38A, 38B) extending in the second direction from the cylindrical portion (32), The display unit with a liftable top described in Appendix 3, wherein the beam connecting portion (33) is fixed to the vertical walls (38A, 38B).

[0074] In the furniture with a liftable top in Appendix 4, the beam connecting part is fixed not only to the cylindrical part but also to the vertical wall extending from the cylindrical part in the second direction, so the support strength of the beam connecting part is increased. Therefore, when this configuration is adopted, it becomes possible for the fixed bracket to firmly support the large load acting on the beam member from the top.

[0075] [Appendix 5] The vertical walls (38A, 38B) are a first vertical wall (38A) extending from the cylindrical portion (32) toward one side in the second direction; a second vertical wall (38B) extending from the cylindrical portion (32) toward the other side in the second direction, the fixed bracket (18) further includes a top horizontal wall (34) extending in a substantially horizontal direction so as to straddle an upper surface of the cylindrical portion (32) along the second direction and connected to the first vertical wall (38A) and the second vertical wall (38B), The display unit with a liftable top described in Appendix 4, wherein the top horizontal wall (34) is fixed to the cylindrical portion (32).

[0076] In the furniture with a liftable top in Appendix 5, the first and second vertical walls arranged at a distance in the second direction are connected to a top horizontal wall extending substantially perpendicular to the first and second vertical walls, so that the rigidity of the structure formed by the first vertical wall, the second vertical wall, and the top horizontal wall can be increased. And, because the top horizontal wall is fixed to the cylindrical portion, the rigidity of the entire fixed bracket including the cylindrical portion is also increased. Therefore, when this configuration is adopted, the fixed bracket can firmly withstand the bending moment caused by the load acting from the top to the central region of the beam member. [Explanation of symbols]

[0077] 1. Furniture with a liftable top 3…Tabletop 10...Lifting device 11…Fixed leg 12…Movable legs 16…Movable script body 16A...Column part 16B…Inward arm section 18…Fixed block 19... Movable shielding tube (shielding member) 26...Outer shielding wall 27…Inner shielding wall 28…Containment space 29…Top wall 32...Base tube (cylindrical part) 34…Top horizontal wall 50...Screw (first fastening member) 51...Screw (second fastening member) 55...Shielding connection part

Claims

1. a lifting device having a fixed leg whose lower end is grounded and a movable leg that moves up and down relative to the fixed leg; A top plate connected to the movable legs; a shielding member that rises and falls together with the tabletop and shields at least the outer side of the movable leg when a side of the tabletop that is farther away from the center of the tabletop in a width direction of the tabletop is defined as an outer side and a side of the tabletop that is closer to the center of the tabletop is defined as an inner side, The movable leg is A movable leg body that is liftably supported by the fixed leg; A fixed block connected to an upper portion of the movable leg body, The fixed block has a shielding connection portion that is connected to the shielding member at a position where it overlaps with the movable leg body in the width direction, and is directly or indirectly connected to the underside of the tabletop.

2. The movable leg body is A columnar portion extending upward from the fixed leg; an inward arm portion extending inward in the width direction from an upper end of the columnar portion, The display unit with a liftable top according to claim 1, characterized in that the fixed block is provided with a cylindrical portion into which the inward arm portion is fixed in a fitted state.

3. the shielding connection portion is connected to the shielding member from above the shielding connection portion by a first fastening member, The display unit with a liftable top as described in claim 1, characterized in that the top is positioned so as to cover the upper part of the first fastening member.

4. The display unit with a liftable top as described in claim 3, characterized in that the fixed block is connected to the underside of the top plate from below the fixed block by a second fastening member.

5. The fixed block has a flat plate portion that fits along the lower surface of the top plate, The display unit with a liftable top as described in claim 4, characterized in that the portion connected to the underside of the top and the shielding connection portion are provided on the flat plate portion.

6. The shielding member is An outer shielding wall that shields the outer side of the movable leg body in the width direction; an inner shielding wall that shields the inside of the movable leg body in the width direction and forms an accommodation space that accommodates the movable leg body together with the outer shielding wall; a top wall connected to at least one of the outer shielding wall and the inner shielding wall so as to shield an upper portion of the storage space, A display unit with a liftable top as described in any one of claims 1 to 5, characterized in that the shielding connection portion of the fixed block is connected to the top wall.

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