JP7527091B2 - Lift table - Google Patents

Description

The present invention relates to a lift-up table that is suitable for use in offices, etc.

Lift-up tables are known in which the tabletop is supported by legs so that the height position can be adjusted. However, when multiple such lift-up tables are arranged side by side, there is a concern that the tabletops of the lift-up tables may interfere with each other.

To avoid such interference between tabletops, a connecting device has been known that engages both ends with the adjusters of adjacent lift tables (see, for example, Patent Document 1).

However, when using the above-mentioned method, it is necessary to prepare a coupling device separately from the lift-up table. Therefore, when changing the position of the lift-up table, it is necessary to disengage the coupling device from the adjuster, place the lift-up table in the specified position, and then re-engage the coupling device with the adjuster, which is time-consuming. In addition, problems may occur such as the coupling device being stored separately being lost or being damaged during the work of changing the position of the lift-up table.

In addition, when using a single lift-up table by pushing it up against a wall, there is a concern that the tabletop may interfere with the wall if the table is placed haphazardly, so some kind of measure is needed.

JP 2018-68931 A

The lift-up table of the invention described in claim 1 is a lift-up table comprising a tabletop, a plurality of leg supports which support the tabletop so that the height position can be adjusted, and a frame which connects these leg supports together, wherein the frame protrudes outward beyond the side edge of the tabletop when viewed in a plane, and the frame is positioned near the lower limit position of the tabletop and at the center between the upper limit position of the tabletop and the floor surface.

The lift-up table of the invention described in claim 1 is a lift-up table comprising a tabletop, a plurality of leg supports which support the tabletop so that the height position can be adjusted, and a frame which connects these leg supports together , wherein the frame protrudes outward beyond the side edges of the tabletop over the entire area between the leg supports when viewed in a plane .

The lift-up table of the invention described in claim 2 is configured as described in claim 1 and is provided with a plurality of leg holding members which respectively hold the leg supports , and the frame indirectly connects the leg supports to each other via the leg holding members .

The lift table according to the invention described in claim 3 is the one described in claim 2, in which the leg supports are supported at their lower ends by the leg holding members, and the frame is horizontally supported between the leg holding members.

The lift table according to the invention described in claim 4 is the one described in claim 1, 2 or 3, in which the frame is provided with an option mounting portion for mounting an optional item.

The lift-up table of the invention described in claim 5 is one having the configuration described in claim 2 or 3 , wherein the frame includes a frame main body rigidly connecting the leg holding members together, and a bumper member covering the outer surface of the frame main body.

The lift-up table of the invention described in claim 6 is configured as described in claim 4 and has a front top plate and a rear top plate, with both left and right ends of the front top plate supported by front leg supports , and both left and right ends of the rear top plate supported by rear leg supports , and is provided with left and right side end structures each having a front leg holding member that holds the front leg support , a rear leg holding member that holds the rear leg support , and a frame that connects these front and rear leg holding members to each other, and the frame of the left side end structure and the frame of the right side end structure are connected by the wiring duct, which is the optional item.

The present invention makes it possible to prevent interference between the tops of multiple lift-up tables and between the tops of lift-up tables and wall surfaces without requiring special parts or effort.

1 is a perspective view showing an entire table system according to an embodiment of the present invention; FIG. 2 is a front view showing the entire table system according to the embodiment. FIG. 2 is a left side view showing the entire table system according to the embodiment. FIG. 2 is a right side view showing the entire table system according to the embodiment. FIG. 2 is a plan view showing the entire table system according to the embodiment. FIG. 2 is an enlarged perspective view showing the table system according to the embodiment with some parts omitted. FIG. 7 is an enlarged view of a portion P in FIG. 6 . FIG. 7 is an enlarged view of a portion Q in FIG. 6 . FIG. 13 is a perspective view of the lift-up tables according to the embodiment in a state where the lift-up tables are spaced apart from each other. 5A to 5C are explanatory diagrams of a procedure for connecting the wiring duct and the mounting base according to the embodiment. FIG. 4 is a front view of the left side end structure according to the embodiment. FIG. 4 is a left side view of the left side end structure according to the embodiment. FIG. 4 is a right side view of the left side end structure according to the embodiment. FIG. 13 is an enlarged cross-sectional view taken along line AA in FIG. 12 . FIG. 13 is an enlarged cross-sectional view taken along line BB in FIG. 12 . FIG. 13 is an enlarged cross-sectional view taken along line CC in FIG. 12 . FIG. FIG. 13 is a perspective view of the side end structure according to the embodiment with the leg support removed. FIG. 19 is an enlarged view of the R portion in FIG. FIG. 19 is an enlarged view of a portion S in FIG. 18 .

One embodiment of the present invention is described below with reference to the drawings.

In this embodiment, the present invention is applied to lift-up tables T1 and T2 used in offices, etc. Here, Fig. 1 to Fig. 6 show an example in which a first lift-up table T1 and a second lift-up table T2 are arranged side by side with their side ends butting against each other.
<First lift table T1>
1 to 5, the first lift table T1 comprises tabletops 1A, 1B, a plurality of leg supports 2A, 2B for supporting the tabletops 1A, 1B so that the height position can be adjusted, a plurality of leg support members 4A, 4B for receiving and holding the leg supports 2A, 2B, respectively, and a frame 5 for connecting the leg support members 4A, 4B together at a portion other than the lower end. Here, the frame 5 indirectly connects the leg supports 2A, 2B together via the leg support members 4A, 4B, and protrudes outward from the side edges 1a of the tabletops 1A, 1B in a plan view. Furthermore, the frame 5 has an option mounting portion 5a for mounting an option item.

In more detail, this lift-up table T1 is a dual type table that has a front tabletop 1A and a rear tabletop 1B, with both left and right ends of the front tabletop 1A supported by front leg supports 2A, and both left and right ends of the rear tabletop 1B supported by rear leg supports 2B. It has left and right side end structures 3 that include a front leg holding member 4A that holds the front leg support 2A, a rear leg holding member 4B that holds the rear leg support 2B, and a frame 5 that connects the front and rear leg holding members 4A and 4B to each other. The frame 5 of the left side end structure 3 and the frame 5 of the right side end structure 3 are connected by a wiring duct 6, which is an optional item.

The front and rear leg supports 2A and 2B have the same structure. When the front and rear leg supports 2A and 2B are referred to collectively without distinction, they are referred to as "leg supports 2". As shown in FIG. 17, each leg support 2 is configured to combine a lower housing 11, a middle housing 13, and an upper housing 15 in a telescopic manner, and to extend and retract the housings 11, 13, and 15 by an internal electric actuator (not shown) (for example, the product name "Electric Lifting Device" manufactured by LINAK Corporation). As shown in FIG. 18 and FIG. 19, the lower end 2x is provided with an attachment part 2y. This attachment part 2y has female screw holes in multiple places. The structure of the leg support 2 is normal, so a detailed description will be omitted. The reference numeral 17 denotes a power line for supplying power to the internal electric actuator.

The front and rear leg holding members 4A, 4B have the same configuration. When these front and rear leg holding members 4A, 4B are referred to collectively without distinction, they are referred to as "leg holding member 4". As shown in FIG. 16, each leg holding member 4 has a hollow portion 4s that is open upward and is a bottomed cylinder that holds the leg support 2. The lower end 2x side of the leg support 2 is inserted into this hollow portion 4s, and in this state the leg support 2 is held by the leg holding member 4. In other words, the hollow portion 4s of the leg holding member 4 in this embodiment has a depth dimension that can hold the entire lower housing 11 of the leg support 2. As shown in Figs. 14 to 17, the leg holding member 4 comprises a holding member main body 19 forming the inner circumference of the hollow portion 4s, an inner cover 21 covering the inner surface side of the holding member main body 19, and an outer cover 23 covering the outer surface side of the holding member main body 19, and the ends of the inner cover 21 and the outer cover 23 are set to abut against each other on the outer circumferential surface of the holding member main body 19. That is, the outer cover 23 and the inner cover 21 are configured to be guided by the outer circumferential surface of the holding member main body 19 and to be continuous and flush with each other. In other words, the thickness dimension of the outer cover 23 is set to be the same as the thickness dimension of the inner cover 21, and the outer surface of the outer cover 23 is continuous and flush with the outer surface of the inner cover 21 by abutting both ends of the outer cover 23 against the end surfaces of the inner cover 21. A plurality of windows are formed on the outer surface side of the holding member main body 19. The outer cover 23 is shorter than the inner cover 21 by the height of the frame 5, so that the upper end of the holding member main body 19 is exposed to the outside. As shown in Fig. 14, the frame 5 is rigidly connected to this exposed portion. Furthermore, as shown in Figs. 14 to 16, 18 and 20, the leg holding member 4 has a bottom wall body 25 having a double bottom wall structure at the bottom and receiving the leg support 2. The bottom wall body 25 is box-shaped and includes an upper bottom plate 27 and a lower bottom plate 29 disposed below the upper bottom plate 27 with an internal space between them, and the lower end of a hanging plate 31 hanging down integrally from two opposing sides of the upper bottom plate 27 is rigidly connected to two opposing sides of the lower bottom plate 29 by welding or the like, and the upper end of an upright plate 33 standing up integrally from the other two opposing sides of the lower bottom plate 29 is rigidly connected to the lower surface of the upper bottom plate 27 by welding or the like. The upper bottom plate 27 has a number of holes 27a corresponding to the mounting portion 2y of the leg support 2, and the lower end 2x of the leg support 2 can be fixed to the upper bottom plate 27 of the bottom wall body 25 by inserting the male threaded portion of the screw v, which is a fastener, into the female threaded hole of the mounting portion 2y through these holes 27a. A number of screw passage windows 29a through which the entire screw v can pass are drilled in the portions of the lower bottom plate 29 corresponding to the holes 27a, and a nut 37 for screwing the adjuster 35 is provided in the center. The two opposing sides of the upper bottom plate 27 are rigidly connected to the lower end of the holding member main body 19 by welding or the like. The lower ends of the outer cover 23 and the inner cover 21 of the leg holding member 4 extend downward from the lower end of the holding member main body 19 to hide the bottom wall body 25.

The frame 5 is installed horizontally between the adjacent leg holding members 4A, 4B at the front and rear, and as shown in Figures 13, 14, and 16 to 18, is equipped with a frame body 37 that rigidly connects the leg holding members 4A, 4B, and a bumper member 39 that covers the outer surface of the frame body 37. In a plan view, the frame 5 protrudes outward by a certain protruding distance d1, for example, about 25 mm, beyond the side edges of the tabletops 1A, 1B. The frame 5 also has an option mounting portion 5a for mounting optional items.

In more detail, as shown in Figures 16 and 17, the frame body 37 is a channel-shaped structure with an upper plate 37b extending from the upper edge of the standing plate 37a and a lower plate 37c extending from the lower edge in the same direction, and both ends of the standing plate 37a of the frame body 37 are rigidly connected by welding or screws to exposed parts provided at the upper ends of the holding member bodies 19 of the corresponding leg holding members 4A and 4B. A pair of nuts 41 that constitute the option mounting part 5a are provided near the center of the standing plate 37a of the frame body 37.

As shown in Figures 16 and 17, the bumper member 39 is a plate-like member with both ends curved toward the leg holding members 4A and 4B, and has a larger vertical width than the frame body 37. The thickness of the bumper member 39 is set to be the same as the thickness of the inner cover 21 of the leg holding members 4A and 4B, and by abutting both ends of the bumper member 39 against the end faces of the inner cover 21, the outer surface of the bumper member 39 is made to be continuous and flush with the outer surfaces of the leg holding members 4A and 4B.

The side end structures 3 described above are arranged in pairs on the left and right in a gate shape, with the right side end structure 3 and the left side end structure 3 being symmetrical. As described above, the left and right side end structures 3 are connected to each other by the wiring duct 6. In more detail, the wiring duct 6 is integrally formed by bending a sheet metal material, and as shown in Figures 10 and 17, it includes a bottom plate 43, a lower plate 45 extending diagonally outward and upward from both side edges of the bottom plate 43, a horizontal plate 47 extending outward from the upper edge of the lower plate 45, and an upper plate 49 extending diagonally outward and upward from the extending end of the horizontal plate 47. At both ends of each upper plate 49, mounting protrusions 51 extending inward are integrally provided, and each mounting protrusion 51 is provided with a screw insertion hole 51a for inserting a screw v as a fastener. These screw insertion holes 51a are provided at positions corresponding to the nuts 41 that constitute the option mounting portion 5a of the frame 5.

As shown in Figures 1, 5, 6, 9, 10 and 17, mounting bases 8 for the desktop panel 7, which is an optional item, are provided near both ends of the wiring duct 6, and the ends of the wiring duct 6 and the mounting base 8 are fastened together using screws v, which are common fasteners, to nuts 41 that constitute the option mounting part 5a provided on the frame 5. In more detail, as shown in Figure 10, the mounting base 8 has a mounting base main body 53 designed according to the shape of the desktop panel 7, and mounting protrusions 55 protruding from both sides of the mounting base main body 53. Each of these mounting protrusions 55 has a screw insertion hole 55a for inserting a screw v, which is a fastener. These screw insertion holes 55a are provided at positions corresponding to the nuts 41 that constitute the option mounting part 5a of the frame 5. A common screw is inserted through the screw insertion hole 51a in the mounting protrusion 51 of the wiring duct 6 and the screw insertion hole 55a in the mounting protrusion 55 of the mounting base 8, and then screwed into the corresponding nut 41 of the frame 5 and tightened, so that the end of the wiring duct 6 and the mounting base 8 are fastened together to the mounting part 5a of the frame 5.

9 is a duct cover detachably attached to the wiring duct 6. As shown in FIG. 17, the duct cover 9 has a U-shaped cross section with vertical walls 9b integrally provided on both sides of the cover body 9a, and can be attached to the wiring duct 6 in a prone position with the vertical walls 9b facing downward, or in a supine position with the vertical walls 9b facing upward. In this embodiment, the duct cover 9 of the first lift-up table T1 is attached to the wiring duct 6 in a prone position. In this embodiment, the desktop panel 7 attached to the mounting base 8 of the first lift-up table T1 includes, for example, a pipe frame 57 and a shielding board 59 detachably attached to the pipe frame 57, as shown in FIG. 1 to FIG. 5. The mounting base 8 includes holding holes 8a for holding both ends of the pipe frame 57, as shown in FIG. 9, FIG. 10, and FIG. 17.

The tabletops 1A and 1B are supported by the multiple leg supports 2A and 2B thus erected so that their height positions can be changed. Specifically, both left and right ends of the front tabletop 1A are supported by a pair of front leg supports 2A, and both left and right ends of the rear tabletop 1B are supported by a pair of rear leg supports 2B.

More specifically, as shown in Figs. 6, 9, 10 and 17, a tabletop support 61 that supports the underside of the tabletops 1A and 1B and an arm 63 extending horizontally from the tabletop support 61 are fixed to the upper end of each leg support 2A, 2B, and the arms 63 of adjacent leg supports 2A and 2B on the left and right are connected to each other by a tabletop support frame 65. The tabletops 1A and 1B are fastened to the tabletop support 61 and the tabletop support frame 65 using fasteners such as screws (not shown). A mesh-shaped wiring support 67 is provided on the underside of the tabletops 1A and 1B as shown in Figs. 1 to 4. This wiring support 67 is for guiding power cords connected to the power lines 17 led out from the upper ends of the leg supports 2A and 2B, and communication or power cords connected to the outlet 69 on the tabletop 1B.

In this embodiment, as shown in Fig. 5, a gap d0, for example, a gap of about 90 mm, sufficient for disposing a desktop panel 7 is formed between the front tabletop 1A and the rear tabletop 1B, and the height positions of the front tabletop 1A and the rear tabletop 1B can be changed steplessly between a lower limit position (D) and an upper limit position (U) independently. The lower limit position (D) is set to a height position optimal for using the tabletops 1A and 1B while seated in a chair. The upper limit position (U) is set to a height position optimal for using the tabletops 1A and 1B while standing.
<Second lift table T2>
The second lift table T2 has basically the same structure as the first lift table T1 described above, and the same parts are given the same reference numerals and the description thereof is omitted.

The second lift-up table T2 in the illustrated example differs from the first lift-up table T1 in that the duct cover 9 is placed in a supine position on the wiring duct 6, the optional desktop panel 7' is a rigid board-like object, the outlet 71 attached to the rear tabletop 1B has not only power terminals but also communication terminals, and a cord holder 73 is provided between the wiring receptacle 67 and the wiring duct 6 to prevent undue force from being applied to the cords or to prevent the cords from becoming distorted as the tabletops 1A, 1B are raised and lowered.
<Combination of First and Second Lift-and-Down Tables T2>
1 to 6 show a table system TS in which a first lift table T1 and a second lift table T2 are arranged in the left-right direction with their frames 5 abutting against each other.

In this table system TS, the bumper member 39 on the frame 5 of the first lift table T1 and the bumper member 39 on the frame 5 of the second lift table T2 are abutted against each other, and a clearance is formed between the top plates 1A, 1B of the first lift table T1 and the top plates 1A, 1B of the second lift table T2 to prevent the lifting and lowering operation of the top plates 1A, 1B from being hindered. This clearance is twice the protruding distance d1 (for example, about 50 mm) from the side edge 1a of the top plates 1A, 1B of the frame 5 of each lift table T1, T2 described above. The presence of this clearance allows the top plates 1A, 1B of the first lift table T1 and the top plates 1A, 1B of the second lift table T2 to lift and lower independently without interference.

This table system also provides a vertical wiring duct 10 by utilizing the gap between the leg holding members 4A, 4B of the first lift-up table T1 and the leg holding members 4A, 4B of the second lift-up table T2. This wiring duct 10 is equipped with a duct body 10a with open upper and lower ends arranged along both leg holding members 4A, 4B, and a cover body 10b arranged between the leg holding members 4A, 4B to close the space inside the duct body 10a. This wiring duct 6 is for guiding cords that are raised from the floor to the wiring duct 6 between the side end structures 3 described above.

In the embodiment described above, FIG. 1 is a perspective view showing the entire table system TS, FIG. 2 is a front view of the same, FIG. 3 is a right side view of the same, FIG. 4 is a left side view of the same, and FIG. 5 is a plan view of the same. FIG. 6 is a perspective view in which the top plates 1A and 1B of the first lift-up table T1 are omitted, and a part of the second lift-up table T2 is omitted from the illustration. In addition, the lower ends of the leg holding members 4A and 4B of the first lift-up table T1 are partially broken to make the inside visible, and the broken part (P part) is shown in an enlarged manner in FIG. 7. Furthermore, in FIG. 6, the intermediate parts of the adjacent leg holding members 4A and 4B of the first and second lift-up tables T2 are cut out, and the cut-out part (Q part) is shown in an enlarged manner in FIG. 8. In addition, in FIG. 8, the inside of the leg supports 2A and 2B is omitted from the illustration, and the omitted parts are patterned. Fig. 9 shows the first lift-up table T1 and the second lift-up table T2 separated from each other, and omits the top plates 1A, 1B, desktop panel 7, wiring receiver 67, etc., of each lift-up table T1, T2, and shows the pair of side end structures 3, the wiring duct 6 connecting these side end structures 3, the leg supports 2A, 2B, the top plate 1A, 1B receivers, and the arm 63. Fig. 10 is for explaining the procedure for connecting the wiring duct 6 and the mounting base 8 to the inner surface of the left side end structure 3 of the first lift-up table T1, and omits the right side end structure 3, etc. Fig. 11 is a front view of the left side end structure 3, Fig. 12 is a left side view of the same, and Fig. 13 is a right side view of the same. 14 is an enlarged cross-sectional view taken along line A-A in FIG. 12, FIG. 15 is an enlarged cross-sectional view taken along line B-B in FIG. 12, and FIG. 16 is an enlarged cross-sectional view taken along line C-C in FIG. 12. FIG. 17 is an exploded perspective view of leg holding members 4A, 4B and frame 5 of side end structure 3 of first lift table T1. FIG. 18 is an oblique view of leg supports 2A, 2B removed from side end structure 3, as viewed from diagonally below. FIG. 19 is an enlarged view of the lower end vicinity (R portion) of leg supports 2A, 2B in FIG. 18. FIG. 20 is an enlarged view of the lower end vicinity (S portion) of leg holding members 4A, 4B.

With the first and second lift-up tables T1, T2 as described above, when these lift-up tables T1, T2 are arranged side-by-side, a clearance can be secured between the adjacent tabletops 1A, 1B due to the lateral protrusion of the frame 5. And, due to the presence of this clearance, the tabletops 1A, 1B of the first lift-up table T1 and the tabletops 1A, 1B of the second lift-up table T2 can be lifted and lowered independently without interfering with each other.

Note that the present invention is not limited to the embodiments described above.

For example, the present invention may be applied to a table system consisting of three or more lift-up tables arranged side by side. Even when only one lift-up table is used by hitting it against an existing wall, the frame protrudes outward from the side edge of the tabletop in a plan view, ensuring clearance between the side edge of the tabletop and the wall surface, allowing the tabletop to be raised and lowered smoothly without interfering with the wall surface.

In the above-mentioned embodiment, a configuration is adopted in which the tabletop is provided with a tabletop, a number of leg supports that support the tabletop in a height-adjustable manner, and a number of leg holding members that respectively hold these leg supports, and the frame indirectly connects the leg supports to each other via the leg holding members. However, the leg supports may also be directly connected to each other by the frame, as long as the frame protrudes outward from the side edge of the tabletop in a plan view. However, according to the configuration of the above-mentioned embodiment, as long as the leg holding members are shaped to match specific leg supports, a variety of tabletop support configurations can be realized simply by changing the connection form between the leg holding members, without changing the type of leg supports or adding new mounting parts to specific leg supports.

In the above-mentioned embodiment, the lower end of the leg support is held by the leg holding member, and the frame is horizontally disposed between the leg holding members. However, a configuration in which the leg holding member supports a part of the leg support in a spliced state may also be adopted. One example of such a configuration is one in which the leg holding member consists only of a bottom wall and a side wall that is spliced to a part of the leg support. However, as in the above-mentioned embodiment, if the lower end of the leg support is held by the leg holding member, it is possible to realize a form in which the leg holding member looks as if it were part of the leg support, and therefore it is possible to prevent or suppress the appearance from becoming complicated due to the provision of the leg holding member.

Furthermore, the frame may not have an option mounting section for mounting optional items, but as in the above-mentioned embodiment, if the upper end of the leg holding member is attached to the frame and an option mounting section is provided on this frame, it becomes possible to easily attach a wiring duct, a mounting base for a desktop panel, etc. to the option mounting section.

In the above-described embodiment, the frame includes a frame body that rigidly connects the leg holding members together, and a bumper member that covers the outer surface of the frame body, but the entire frame may be formed as a single unit. However, according to the configuration of the above-described embodiment, it is also possible to use a rigid material for the frame body while using a cushioning material for the bumper member. The bumper member can also prevent the option mounting portion from being exposed to the outside.

As described above, the frame may be any type that directly or indirectly connects the leg supports to each other, and may connect any part of the leg supports. However, as in the above-described embodiment, if the frame supports the leg supports via the leg holding member, the following effects can be obtained. That is, with such a configuration, in a dual-type lift table having a front top and a rear top, the leg supports used in a single-type lift table having only one top can be held by the leg holding member without processing, so that the leg supports can be shared between the dual-type lift table and the single-type lift table. Specifically, in a single-type lift table, the leg supports are erected on the leg base and support the top by the leg supports, but by holding such leg supports by the leg holding member in the present embodiment, they can be used in a dual-type lift table without processing. In addition, as in the embodiment described above, if a pair of gate-shaped side end structures are constructed on the left and right sides, with the upper end of the front leg holding member and the upper end of the rear leg holding member connected by a frame, it becomes possible to directly connect the frame of the left side end structure and the frame of the right side end structure with a wiring duct, minimizing the number of parts.

In addition, in the above-mentioned embodiment, a dual type table with a front tabletop and a rear tabletop is described, but even if there is only one tabletop with a large depth dimension that allows seating on both the front and rear ends, if the left and right ends of the tabletop are supported by two front and rear leg supports each and the two front and rear leg supports are connected by a frame that protrudes outward beyond the side edge of the tabletop in a plan view, clearance can be ensured between horizontally adjacent tabletops or between the side edge of the tabletop of the tabletop and the wall.

Various modifications may be made without departing from the spirit of the present invention.

T1, T2... Lift-up table 1A, 1B... Table top 2 (2A, 2B)... Leg support 2x... Lower end of leg support 3... Side end structure 4 (4A, 4B)... Leg holding member 5... Frame 5a... Option mounting part 6... Wiring duct (optional item)
8: Mounting base 37: Frame body 39: Bumper member

Claims (6)

A lift table including a tabletop, a plurality of leg supports that support the tabletop in a height -adjustable manner, and a frame that connects the leg supports to each other ,
A lift-up table in which the frame protrudes outward beyond the side edges of the tabletop over the entire area between the leg supports when viewed in a plane . The present invention comprises a plurality of leg support members each of which supports one of the leg supports ,
2. The lift table according to claim 1, wherein the frame indirectly connects the leg supports to each other via the leg holding members. 3. A lift table according to claim 2, wherein the leg supports have lower ends supported by the leg holding members, and the frame is horizontally supported between the leg holding members. 4. A lift table according to claim 1, 2 or 3, wherein the frame is provided with an option mounting portion for mounting an option item. 4. The lift table according to claim 2, wherein the frame comprises a frame body for rigidly connecting the leg holding members together , and a bumper member for covering an outer surface of the frame body. The chair has a front tabletop and a rear tabletop, and the left and right ends of the front tabletop are supported by front leg supports , and the left and right ends of the rear tabletop are supported by rear leg supports ,
the side end structure includes a front leg support member for supporting the front leg support , a rear leg support member for supporting the rear leg support , and a frame for connecting the front and rear leg support members to each other,
5. A lift table according to claim 4, wherein the frame of the left side end structure and the frame of the right side end structure are connected by the optional wiring duct.

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