JP7295993B2 - Desk with adjustable top plate - Google Patents

Description

The present invention relates to a desk with a liftable top plate.

2. Description of the Related Art Conventionally, there is known a desk with a liftable top plate whose height can be adjusted (see Patent Documents 1 and 2, for example). By adjusting the height of the top board according to the different physiques of the desk users and their work in a standing position, the desk users can maintain their ideal posture and demonstrate their abilities efficiently and effectively. can.

Also, as a lifting unit for moving the top plate in the vertical direction, an electric lifting unit is known (see Patent Document 3, for example). Such an electric lifting unit is configured to be vertically extendable by being driven by an electric motor. The operation of the elevating unit is controlled by a control unit separately attached to the desk with the elevating table.

JP 2017-79890 A JP 2016-202883 A Japanese Patent Publication No. 2017-519546

In recent years, there has been a demand for a larger top plate in desks with a liftable top plate. In general, a desk with a liftable top plate is provided with a pair of end legs with lifting units that support both edges in the width direction of the top plate. In addition to insufficient strength of the parts, the weight of the top plate increases, so there is a problem that the top plate cannot be moved up and down smoothly with only a pair of left and right lifting units.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a desk with an electric lifting/lowering top plate that can cope with an increase in the size of the top plate.

A desk with an elevating top plate of the present invention comprises first and second top plates connected in the left-right direction, an electric lifting type first pedestal supporting one of the left and right sides of the first top plate from below, and an electric lifting type second pedestal supporting the other left and right sides of the second top plate from below; and an electric lifting type third pedestal supporting the connecting portion of the two top plates from below; At the lower end of the first pedestal, there is a first grounding leg that extends forward and backward across the first pedestal. A grounding leg is provided at the lower end of the third pedestal, and a third grounding leg extends forward and backward across the third pedestal. The second ground leg and the third ground leg are connected by a second lower beam member extending in the left-right direction.

In the desk with a liftable top plate of the present invention, the first grounding leg is provided with a first connecting portion that protrudes left and right inward toward the third grounding leg, and the second grounding leg is provided with the third grounding leg. A second connecting portion projecting left and right inward toward the three grounding legs is provided, and the third grounding leg has a pair of left and right third grounding legs projecting left and right outward toward the first and second grounding legs. A connecting portion is provided, one end side of the first lower beam member is connected to the first connecting portion, the other end side of the first lower beam member is connected to one of the right and left sides of the third connecting portion, and the third connecting portion is provided. The one end side of the second lower beam member may be connected to the other left and right of the portion, and the other end side of the second lower beam member may be connected to the second connecting portion.

Further, each of the connecting portions may be positioned on an extension line of the corresponding pedestal in each of the grounding legs when viewed in the left-right direction.

Further , the upper side of each of the pedestals may be attached to a support frame attached to the lower side of each of the top plates.

Further, in the desk with a liftable top plate of the present invention, each of the lower beam members is connected to a front-rear center portion of the side wall portion of each of the grounding legs, and the side wall portion of each of the grounding legs extends in the front-rear direction. The height dimension of the central portion may be formed to be greater than the height dimension of the both end portions in the front-rear direction .

INDUSTRIAL APPLICABILITY The desk with a liftable top plate of the present invention can cope with an increase in the size of the top plate.

It is a figure which shows one Embodiment, and is the perspective view seen from diagonally above. It is a figure which shows the same embodiment, and is the perspective view seen from diagonally below. It is a front view which shows the same embodiment. It is a side view which shows the same embodiment. It is the perspective view which looked at the beam member of the same embodiment, a leg part, etc. from diagonally above. It is the perspective view which looked at the circumference|surroundings of the arm part of the same embodiment, and a beam member from diagonally above. It is the perspective view which looked at the intermediate|middle support part periphery of the embodiment from diagonally above. It is a bottom view which shows the same intermediate|middle support part. It is the perspective view which looked at the intermediate|middle support part from diagonally above. It is the perspective view which looked at the same intermediate|middle support part from the diagonally downward direction. It is a perspective view for demonstrating the connection structure of the same intermediate|middle support part and another member. There is a sectional view taken along the line AA in FIG. (A) is a cross-sectional view taken along line BB of FIG. 8, (A) is a cross-sectional view along line CC of FIG. 8, and (B) is a cross-sectional view along line DD of FIG. It is the perspective view which looked at the grounding leg of a leg from diagonally downward, (A) shows an end leg, (B) shows an intermediate leg. FIG. 10 is a perspective view showing a connecting portion between an intermediate leg and a lower beam member; It is a bottom view which shows the same connection location. FIG. 11 is a perspective view showing another configuration of the connecting portion between the intermediate leg and the lower beam member; It is a figure which shows the same connection location, (A) shows a bottom view, (B) shows sectional drawing.

Next, embodiments of the present invention will be described based on the drawings. In this specification, for the sake of convenience, terms such as front-rear and left-right are used to specify directions, but the front-rear and left-right directions refer to the longitudinal direction of the top plate 2 on which the pair of end legs 5, 5 are arranged. The left-right direction is defined as the left-right direction, and the direction orthogonal to the left-right direction in the horizontal plane is defined as the front-rear direction. The side on which the operation switch 15 is arranged is defined as the front side. In addition, the present invention is not limited to the configuration in the directions specified in the embodiments described below.

As shown in FIGS. 1 to 4, a desk 1 with a liftable top plate (hereinafter also simply referred to as desk 1) includes a top plate portion 2 having top plates 2A and 2B and both edges in the width direction of the top plate portion 2. and an intermediate leg 31 arranged between the end legs 5, 5. The intermediate leg portion 31 and the end leg portions 5, 5 each have an elevating unit 4 for moving the top plate portion 2 in the vertical direction. The intermediate leg portion 31 is connected to the top plate portion 2 via an intermediate support portion 32 . Although details will be described later, the intermediate support portion 32 includes a pair of front-rear direction beam members 33, 33 which are spaced apart in the left-right direction and attached to the lower surfaces of the top plates 2A, 2B, respectively. A connection beam member 34 is provided to connect them together.

In this embodiment, a pair of end leg portions 5, 5 are spaced apart in the left-right direction (width direction). An intermediate leg 31 is arranged between the end legs 5,5. Each of the legs 5 and 31 has a ground leg 7 arranged on the floor and an elevating unit 4 erected on the ground leg 7 . The grounding leg 7 extends in the front-rear direction. Adjusters 8 for adjusting the height and horizontality of the legs 5 and 31 are provided at the front and rear ends of the lower surface of the ground leg 7 .

The front and rear central portions of the adjacent ground legs 7, 7 are connected to each other by a lower beam member 9 as a lower connecting member extending in the left-right direction. In this embodiment, a pair of left and right lower beam members 9 extending in both left and right directions from the lower portion of the intermediate leg portion 31 and reaching the lower portions of the end leg portions 5, 5 are provided. The lower end of the lifting unit 4 extending vertically is connected to the center of the upper surface of the grounding leg 7 . The upper ends of the lifting units 4, 4 of the end legs 5, 5 are connected to a pair of left and right arm members 10, 10 attached to the lower surface of both edges in the width direction of the top plate 2 so as to extend in the front-rear direction. there is An upper end portion of the lifting unit 4 of the intermediate leg portion 31 is connected to an intermediate support portion 32 which will be described later.

The lifting unit 4 is configured to be vertically extendable. Specifically, the lift unit 4 includes a housing portion 11 that houses a drive source such as an electric motor, an inner cylindrical member 12 that is connected to the lower surface of the housing portion 11, and an intermediate member that covers the outer periphery of the inner cylindrical member 12. It has a tubular member 13 and an outer tubular member 14 that covers the outer circumference of the intermediate tubular member 13 . The cylindrical members 12, 13, and 14 are each formed in a cylindrical shape extending in the vertical direction.

Inside the housing portion 11 and the tubular members 12 , 13 , 14 , there are provided drive mechanisms for vertically moving the tubular members 12 , 13 with respect to the outer tubular member 14 . By activating the drive mechanism with a drive source such as an electric motor in the housing portion 11, the elevation unit 4 can be vertically extended and contracted. Thus, the legs 5 and 31 support the top plate 2 so as to be able to move up and down.

The top plate portion 2 includes two top plates 2A and 2B connected in the width direction. The top plates 2A and 2B are substantially rectangular in plan view, and each has an opening 2a extending vertically through the central portion thereof. The opening 2a is formed in a substantially rectangular shape whose longitudinal direction extends along the left-right direction. A cover body 2b whose longitudinal direction extends along the left-right direction is detachably arranged in the opening 2a. The left and right ends of the cover body 2b are placed on two cover body supporting members 2c, 2c attached to the lower surface of the top plate part 2 so that the ends are exposed inside the left and right edges of the opening 2a. be done. Further, an operation switch 15 for inputting an operation for extending and retracting the lifting unit 4 is attached to the lower surface of the left side of the left top plate 2A of the top plates 2A and 2B.

5 and 6, left and right beam member groups 3, 3 each having an intermediate support portion 32, a plurality of beam members 16, 17, and 18, and a pair of arm members are provided on the lower surface of the top plate portion 2, as shown in FIGS. 10, 10 are attached. The arm members 10, 10 are attached to the lower surfaces of the left and right outer edges of the top plates 2A, 2B. Each arm member 10 includes an arm tubular portion 19 extending in the front-rear direction, and a housing mounting portion 20 projecting laterally from the central portion of the arm tubular portion 19 toward the central portion of the top plate portion 2 .

The arm tubular portion 19 and the housing attachment portion 20 are attached to the bottom surface of the top plate portion 2 with a plurality of bolts 21 . The upper portion of the lifting unit 4 (leg portion 5 ) and the arm member 10 are connected by accommodating and fixing the housing portion 11 of the lifting unit 4 in the housing mounting portion 20 .

A groove portion extending in the front-rear direction is formed on the lower surface of the arm tube portion 19, and a cover member 22 made of resin extending in the front-rear direction is detachably attached to the groove portion. Resin cap members 23 are detachably attached to the front and rear end portions of the arm tube portion 19 .

The beam member group 3 is provided for each of the top plates 2A and 2B and arranged between the arm member 10 and the intermediate support portion 32 . The beam member group 3 includes a pair of front and rear inner beam members 16 , 16 , a pair of front and rear outer beam members 17 , 17 , and a pair of left and right reinforcing beam members 18 , 18 . The beam members 16 and 17 are arranged to extend in the left-right direction, and the reinforcing beam member 18 is arranged to extend in the front-rear direction.

In the beam member group 3, a pair of front and rear inner beam members 16, 16 are arranged across the opening 2a of the top panel 2 in a plan view. A pair of front and rear outer beam members 17 , 17 are arranged with inner beam members 16 , 16 interposed therebetween. The end portions of the beam members 16 and 17 on the side of the arm member 10 are connected to the arm tube portions 19, respectively. The ends of the beam members 16 and 17 on the side of the intermediate support portion 32 are connected to the longitudinal direction beam member 33 respectively. The beam members 16 and 17 are attached to the lower surface of the top plate portion 2 with a plurality of bolts 24 and 25. As shown in FIG.

In addition, in the beam member group 3, a pair of left and right reinforcing beam members 18, 18 are arranged across the opening 2a of the top panel 2 in plan view. The front and rear end portions of the reinforcing beam members 18 , 18 are fixed to the inner beam members 16 , 16 . In this embodiment, the reinforcing beam members 18, 18 are not fixed to the top plate portion 2, but are laid over the inner beam members 16, 16. As shown in FIG. A wiring receiving member 26 on which a power tap, wiring, and the like can be placed is attached to the lower surfaces of the reinforcing beam members 18 , 18 . The wire receiving member 26 includes a pair of left and right arm portions 27, 27 attached to the lower surfaces of the reinforcing beam members 18, 18, and a body portion 28 connected to the lower ends of the arm portions 27, 27. As shown in FIG. The body portion 28 is arranged below the opening portion 2 a of the top plate portion 2 .

Next, the intermediate support portion 32 will be described with reference to FIGS. 7 to 13 as well. The intermediate support portion 32 includes a pair of longitudinal beam members 33, 33 spaced apart in the width direction, and a connecting beam member 34 that connects the longitudinal beam members 33, 33 together. The intermediate support portion 32 also includes a wiring receiving beam member 35 and a control unit housing beam member 36 that connect the longitudinal beam members 33 , 33 together. The wiring receiving beam member 35 and the control unit housing beam member 36 are arranged in front and behind with the connecting beam member 34 interposed therebetween. The control unit housing beam member 36 houses the control unit 6 therein. In addition, joints between members in the intermediate support portion 32 are firmly joined by, for example, welding.

The longitudinal beam members 33, 33 are arranged to extend in the longitudinal direction, one longitudinal beam member 33 is attached to the lower surface of the top plate 2A, and the other longitudinal beam member 33 is attached to the lower surface of the top plate 2B. That is, the pair of longitudinal beam members 33, 33 are attached to the lower surfaces of the top plates 2A, 2B across the boundary 2d between the pair of adjacent top plates 2A, 2B.

Each front-rear beam member 33 includes a top surface portion 33a that abuts on the lower surface of the top plate 2A or 2B, side wall portions 33b and 33c that extend downward from both left and right ends of the top surface portion 33a, and front and rear beam members 33b and 33c that extend downward from the lower ends of the side wall portions 33b and 33c. A pair of left and right bottom portions 33d, 33d projecting inward from the direction beam member 33 are provided. Left and right ends of the beam members 34, 35, and 36 are connected to the inner side wall portion 33b, which is located on the center side of the top plate portion 2, among the side wall portions 33b and 33c. Left and right ends of the beam members 16 and 17 of the beam member group 3 are connected to the outer side wall portions 33c positioned on the left and right edge side of the top plate portion 2 among the side wall portions 33b and 33c.

As shown in FIGS. 9 to 11, on the outer side wall portion 33c of the longitudinal beam member 33, a pair of front and rear inner brackets 33e, 33e and inner brackets 33e, 33e are attached to the joints with the beam members 16, 17. A pair of front and rear outer brackets 33f, 33f are fixed so as to be sandwiched between them. A nut 33g is fixed to each bracket 33e, 33f. Bolts 37 are inserted from below into bolt insertion holes 16a, 17a provided at the ends of the bottom surfaces of the beam members 16, 17 and attached to nuts 33g, so that the beam members 16, 17 and the longitudinal beam member 33 are attached. connected to each other. As a result, a pair of left and right beam member groups 3 are connected to the left and right side portions of the intermediate support portion 32 .

On the top surface portion 33a of the front-rear beam member 33, there are a total of six locations: two locations aligned horizontally at the front end, two locations aligned longitudinally at the center, and two locations aligned horizontally at the rear end. A bolt insertion hole 33h penetrating through is formed. As shown in FIGS. 2 to 5, the longitudinal beam member 33 has grooves formed on its lower surface (between the left and right bottom surface portions 33d, 33d) in the same manner as the arm tubular portion 19 of the arm member 10. A pair of front and rear cover members 22 are detachably attached to the space). Cap members 23 are detachably attached to front and rear end portions of the front and rear direction beam members 33 .

As also shown in FIGS. 7 to 12 and 13B, the connecting beam member 34 is arranged to extend in the left-right direction, and connects the central portions of the front-rear direction beam members 33, 33 to each other. The connecting beam member 34 includes a flat plate-like top surface member 38 and a housing accommodating member 39 connected to the lower surface of the top surface member 38 .

Protruding portions 38a are formed in the central portions of the left and right edges of the top panel member 38 so as to protrude outward to the left and right. The protruding portion 38a is fitted into a recessed portion 33i formed in the central inner edge portion of the top surface portion 33a of the front-rear beam member 33. As shown in FIG. The top surface member 38 is formed wider than the housing accommodating member 39 in the front-rear direction. Four bolt insertion holes 34a aligned in the left-right direction are formed vertically through the front and rear edge portions 38b, 38b positioned on the front and rear outer sides of the housing accommodating member 39 in a plan view.

The housing accommodating member 39 includes a pair of front and rear side wall portions 39a, 39a connected to the lower surface of the top plate member 38, and a bottom portion 39b connecting the lower end portions of the side wall portions 39a, 39a. An opening 39c through which the housing portion 11 of the lifting unit 4 can be inserted is formed in the bottom portion 39b. Left and right ends of the housing accommodating member 39 are inserted into the front-rear beam member 33 through notch portions 33j formed in the central portion of the inner side wall portions 33b of the front-rear beam member 33 .

As shown in FIG. 11, the housing portion 11 is placed inside the housing accommodating member 39 through the opening 39c from below. Four bolt insertion holes 39f are formed in the side wall portions 39a, 39a corresponding to the positions of a total of four bolt mounting holes 11a provided in pairs on the front and rear side surfaces of the housing portion 11, respectively. ing. The housing portion 11 of the lifting unit 4 is fixed to the housing accommodating member 39 by attaching the housing fixing bolt 40 to the bolt mounting hole 11a through the bolt insertion hole 39f. Thereby, the upper portion of the intermediate leg portion 31 is firmly fixed to the intermediate support portion 32 .

Further, the housing accommodating member 39 includes a pair of front and rear upper and lower grooves formed at both left and right end portions positioned inside the front-rear direction beam member 33 from the upper and lower middle portions to the lower end portions of the side wall portions 39a, 39a, and a pair of upper and lower grooves formed between the grooves. A pair of front and rear wire insertion grooves 39d, 39d extending in the front-rear direction so as to connect the front and rear wiring insertion grooves 39d, 39d formed by the front-rear grooves formed in the bottom surface portion 39b. A pair of left and right wire insertion grooves 39e, 39e extending toward the center of the housing member 39 from the central portions of the front and rear wire insertion grooves 39d, 39d are formed in the bottom portion 39b. In this embodiment, the right end of the left lateral wire insertion groove 39e is connected to the opening 39c.

By providing the front-rear wiring insertion groove 39d in the housing accommodating member 39 in this way, it is possible to wire cables such as power supply wiring and electric signal wiring in the front-rear direction inside the front-rear direction beam member 33 . Further, by providing the left and right wire insertion grooves 39e, it is possible to pull out cables and the like from the inside of the housing accommodating member 39 downward through the left and right wire insertion grooves 39e.

As shown in FIGS. 7 to 10 and 13A, the wire receiving beam member 35 connects the inner side wall portions 33b, 33b of the left and right front-to-rear direction beam members 33, 33 on the front side of the connecting beam member 34. there is The wiring receiving beam member 35 includes a bottom surface portion 35a extending in the left-right direction, a pair of front and rear side wall portions 35b, 35b extending upward from both front and rear end portions of the bottom surface portion 35a, and wiring receiving beams extending from the upper edges of the side wall portions 35b, 35b. A pair of front and rear mounting surface portions 35c, 35c projecting toward the front and rear outer sides of the member 35 are provided.

Four bolt insertion holes 35d aligned in the horizontal direction are formed through each mounting surface portion 35c in the vertical direction. Four laterally long openings 35e are arranged vertically and horizontally in the bottom part 35a, and the contents inside the wire receiving beam member 35 can be visually recognized from below through the openings 35e.

The inner side wall portion 33b of the front-rear beam member 33 is formed with a wiring opening 33k through which a cable terminal such as a power plug or a connector can be inserted at a connecting portion of the wiring receiving beam member 35. As shown in FIG. The internal spaces of the front-rear direction beam member 33 and the wiring receiving beam member 35 are connected via a wiring opening 33k, and a cable can be routed between the front-rear direction beam member 33 and the wiring receiving beam member 35. there is

As shown in FIGS. 7 to 11 and 13(C), the control unit housing beam member 36 as an example of the unit support member is provided on the inner side wall portions of the left and right longitudinal direction beam members 33, 33 on the far side of the connecting beam member 34. 33b, 33b are connected to each other. The control unit housing beam member 36 has roughly the same shape as the wire receiving beam member 35, and includes a bottom surface portion 36a, a pair of front and rear side wall portions 36b, 36b, and a pair of front and rear mounting surface portions 36c, 36c. .

Four bolt insertion holes 36d aligned in the horizontal direction are formed through each mounting surface portion 36c in the vertical direction. The bottom surface portion 36a is formed with a laterally elongated opening 36e extending from the central portion to the right side and an opening 36f formed in the left side side by side in the left-right direction. A pair of left and right projecting members 36g, 36g are fixed to the upper surface of the bottom surface portion 36a between the openings 36e, 36f.

As shown in FIG. 11, the control unit 6 is formed with a pair of front and rear fixing holes 6a, 6a penetrating vertically. When the control unit 6 is housed in the control unit housing beam member 36, the position of the control unit 6 is fixed by inserting the projecting members 36g, 36g into the fixing holes 6a, 6a. When the control unit 6 is fixed in position, the left and right side portions of the control unit 6 on which the connection terminal receiving members are arranged are exposed to the openings 36e and 36f when viewed from below, and the control unit accommodation beam member The connection terminal receiving member of the control unit 6 is accessible from the lower side of 36 .

Also, in the inner side wall portion 33b of the front-rear direction beam member 33, a wiring opening 33k similar to the connection portion of the wiring receiving beam member 35 is formed at the connection portion with the control unit housing beam member 36. As shown in FIG. As a result, cables can be routed between the longitudinal beam member 33 and the control unit housing beam member 36 via the wiring opening 33k.

Circular wiring openings 33l are formed in the outer side wall portion 33c of the front-rear direction beam member 33 at a connecting portion with the pair of front and rear inner beam members 16, 16. As shown in FIG. The internal spaces of the inner beam member 16 and the front-rear beam member 33 are connected via a wiring opening 33l, so that a cable can be routed between the inner beam member 16 and the front-rear beam member 33 .

As shown in FIGS. 7, 12 and 13, the lower surfaces of the top plates 2A and 2B have a plurality of female screw holes 2e corresponding to the positions of the bolt insertion holes 33h, 34a, 35d and 36d of the intermediate support portion 32. formed. The intermediate support portion 32 is firmly fixed to the lower surfaces of the top plates 2A and 2B by a plurality of support portion mounting bolts 41 which are attached to the female screw holes 2e from below through the bolt insertion holes 33h, 34a, 35d and 36d. be.

In the desk 1 with a liftable top plate of this embodiment, an intermediate leg portion 31 having a lift unit 4 is connected to an intermediate support portion 32 having a pair of longitudinal direction beam members 33, 33 and a connecting beam member 34 connecting them. , supports the central portion of the top plate portion 2 . Therefore, even if the top plate portion 2 is enlarged, the top plate portion 2 can be moved up and down smoothly by the intermediate leg portion 31 and the pair of end leg portions 5 , 5 . Further, the intermediate support portion 32 improves the strength of the central portion of the top plate portion 2 and firmly fixes the intermediate leg portion 31 to the top plate portion 2 . Thereby, the desk 1 can cope with the enlargement of the top board.

In addition, since the intermediate leg portion 31 that supports the center portion of the top plate portion 2 is firmly fixed to the top plate portion 2 via the intermediate support portion 32, the load caused by the rolling of the top plate is reduced to the end leg portion 5. , 5 and the top plates 2A and 2B and the connection portions between the intermediate leg portion 31 and the top plates 2A and 2B. Therefore, it is possible to reduce the lateral shaking of the top plate portion 2, and prevent damage to the members and loosening of the bolts at these connecting portions.

In the desk 1 of this embodiment, the front-rear direction beam members 33 are attached to the pair of adjacent top plates 2A and 2B at the intermediate support portion 32 for each of the top plates 2A and 2B. 33 are connected by connecting beam members 34 . Therefore, the connecting portion of the pair of adjacent top plates 2A and 2B can be firmly fixed by the intermediate support portion 32. As shown in FIG.

Furthermore, since the intermediate support portion 32 is supported by the intermediate leg portions 31, the intermediate leg portions 31 can highly rigidly support the top plate portion 2 in which the plurality of top plates 2A and 2B are connected. Further, by dividing the top plate portion 2 into a plurality of top plates 2A and 2B, manufacturing, transportation, and storage of the top plate portion 2 can be facilitated.

Further, since the intermediate leg portion 31 is arranged below the boundary 2d between the top plates 2A and 2B, the top plate portion 2, which connects the top plates 2A and 2B, can be supported in a well-balanced manner. In addition, when viewed from the front and rear direction, the boundary 2d between the adjacent top plates 2A and 2B and the intermediate leg portion 31 are aligned in the vertical direction, so that the appearance is improved.

In addition, since the connecting beam members 34 are fixed to the respective lower surfaces of the pair of adjacent top plates 2A and 2B, the connecting portions of the adjacent top plates 2A and 2B can be fixed more firmly. In this embodiment, the wiring receiving beam member 35 and the control unit housing beam member 36 are also fixed to the lower surfaces of the top plates 2A and 2B, respectively, so that the connection points of the top plates 2A and 2B can be fixed more firmly.

In addition, the intermediate support section 32 includes a control unit housing beam member 36 as a unit support member for supporting the control unit 6 that controls the operation of the lifting unit 4. The control unit housing beam member 36 includes a pair of longitudinal beam members. 33, 33 are connected. Therefore, the control unit 6 can be arranged compactly between the pair of longitudinal beam members 33 , 33 , and the pair of longitudinal beam members 33 , 33 can be more firmly connected by the control unit housing beam member 36 .

Next, the connecting structure between the legs 5, 31 and the lower beam member 9 will be described with reference to FIGS. 14 to 16 as well. As shown in FIG. 14A, among the left and right side walls of the grounding leg 7 of the end leg 5, the side wall 7a on the center side of the desk 1 has a connection protrusion 7b facing the grounding leg 7 of the intermediate leg 31. is protruded. A pair of left and right bolt insertion holes (not shown) are formed in the lower surface portion 9a of the lower beam member 9 in the shape of a substantially rectangular cylinder at the outer end portions 9b on the left and right edge side of the desk 1 among the left and right ends of the lower beam member 9. is provided. The outer end portion 9b of the lower beam member 9 is firmly fixed to the connecting protrusion 7b by bolts 42 attached to the connecting protrusion 7b from below through these bolt insertion holes.

As shown in FIGS. 14(B), 15 and 16, a pair of left and right beam connecting fittings 43, 43 are attached to the left and right side wall portions 7c, 7c of the grounding leg 7 of the intermediate leg portion 31. As shown in FIGS. The beam connecting fitting 43 includes a plate-like member 43a that abuts on the central portion of the side wall portion 7c, and projecting members 43b that protrude from the left and right outer side surfaces of the plate-like member 43a toward the left and right outer sides. The protruding member 43b has a laterally elongated bottom surface 43c and a pair of front and rear side walls 43d, 43d extending upward from the front and rear edges of the bottom surface 43c. A pair of left and right fastener mounting holes 43e, 43e are formed in the bottom portion 43c.

A bent protrusion 43f is provided at the lower end of the plate-like member 43a. In addition, in the beam connecting fitting 43, bolts 45 are inserted from the left and right outer sides into left and right bolt insertion holes penetrating through the plate-like member 43a and the side wall portion 7c. It is fixed to the side wall portion 7c of the grounding leg 7 by being attached to the nut 46 . The upper surface of the bending protrusion 43f contacts the lower surface of the side wall portion 7c, so that the beam connecting fitting 43 is non-rotatably fixed.

A pair of front and rear elastic members 44, 44 are attached to the outer side surfaces of the side wall portions 43d, 43d in the front-rear direction. The elastic member 44 is made of, for example, plate-like rubber. The dimension between the front and rear outer surfaces of the elastic members 44, 44 is slightly smaller than the inner diameter dimension of the lower beam member 9 in the front and rear direction. That is, the projecting member 43b and the elastic members 44, 44 are configured to be insertable into the center side end portion 9c of the lower beam member 9. As shown in FIG.

The center side end portion 9c of the lower beam member 9 is fitted so as to cover the projecting member 43b and the elastic members 44,44. A pair of left and right fastener insertion holes 9d, 9d are formed in the lower surface portion 2a of the central end portion 9c of the lower beam member 9 so as to correspond to the positions of the fastener mounting holes 43e, 43e.

A fastener 47 made of resin is inserted through the fastener insertion hole 9d and the fastener attachment hole 43e from below, and the fastener 47 is attached to the fastener attachment hole 43e. The fastener 47 is, for example, a push-turn rivet. By pushing the head of the pin member 47b inserted into the tubular portion of the rivet member 47a, the distal end portion of the tubular portion of the rivet member 47a expands in the radial direction. is configured to In this embodiment, the head portion of the pin member 47b is pushed upward while the cylindrical portion of the rivet member 47a of the fastener 47 is inserted through the fastener insertion hole 9d and the fastener attachment hole 43e, thereby causing the rivet member to move. The distal end of the cylindrical portion of 47a expands radially above the fastener mounting hole 43e, and the fastener 47 is attached to the fastener mounting hole 43e so as not to come off.

As shown in FIG. 16, the fastener insertion hole 9d of the lower beam member 9 is formed as an elongated hole elongated in the front-rear direction. The longitudinal dimension of the fastener insertion hole 9d is larger than the outer diameter of the body portion of the fastener 47 (cylindrical portion of the rivet member 47a). Elastic members 44 , 44 are arranged between the front and rear outer wall surfaces of the side wall portions 43 d , 43 d of the beam connecting fitting 43 and the inner peripheral wall of the lower beam member 9 . As a result, the elastic member 44 is elastically deformed in the thickness direction (front-rear direction), so that the beam connecting fitting 43 and the center-side end portion 9c of the lower beam member 9 are connected so as to be relatively displaceable in the front-rear direction. . That is, the center side end portion 9c of the lower beam member 9 is connected to the lower portion of the intermediate leg portion 31 and is configured to be displaceable relative to the lower portion of the intermediate leg portion 31 in the front-rear direction.

In this embodiment, the inner diameter of the fastener mounting hole 43e and the width of the fastener insertion hole 9d are set to be slightly larger than the outer diameter of the cylindrical portion of the rivet member 47a before the pin member 47b is pushed. ing. That is, in a state in which the fastener 47 is attached to the fastener attachment hole 43e via the fastener insertion hole 9d, the lower beam member 9 is attached to the beam connecting fitting 43 so as not to be displaced in the left-right direction.

In this way, in the desk 1, the lower beam member 9 as a lower connecting member connects the lower portion of the end leg portion 5 and the lower portion of the intermediate leg portion 31, thereby improving the strength of the support structure of the top plate portion 2. Therefore, the lateral vibration of the top plate portion 2 is reduced.

In addition, since one center side end portion 9c of the both end portions of the lower beam member 9 is connected to the lower portion of the intermediate leg portion 31 so as to be displaceable, the center of the lower beam member 9 is By displacing the side end portion 9c relative to the lower portion of the intermediate leg portion 31, the load applied to the lifting unit 4 can be reduced, and the top plate portion 2 can be moved up and down smoothly.

The direction in which the center side end portion 9c of the lower beam member 9 can be displaced with respect to the lower portion of the intermediate leg portion 31 is not limited to the front-rear direction, and may be set in any direction. Further, the outer end portion 9b of the lower beam member 9 may be configured to be displaceable with respect to the lower portion of the end leg portion 5. As shown in FIG.

Another configuration of the connection structure between the intermediate leg portion 31 and the lower beam member 9 will be described below. As shown in FIGS. 17 and 18, a pair of left and right beam connecting fittings 51, 51 are attached to left and right side wall portions 7c, 7c of the grounding leg 7 of the intermediate leg portion 31. As shown in FIG. Similar to the beam connecting fitting 43, the beam connecting fitting 51 includes a plate-like member 51a that abuts on the central portion of the side wall portion 7c, and projecting members 51b that protrude from the left and right outer side surfaces of the plate-like member 51a toward the left and right outer sides. consists of The lower end of the plate member 51a is provided with a bent protrusion 51f that is bent downward from the lower end of the side wall 7c of the grounding leg 7, and the upper surface of the bent protrusion 51f faces the lower surface of the side wall 7c. abutted.

The protruding member 51b has a substantially U-shape in which a pair of front and rear side wall portions 51d, 51d are erected upward from the front and rear edge portions of the bottom portion 51c, which is horizontally long in the left and right direction. It is configured in a substantially L shape. A pair of front and rear elastic members 52a, 52a are attached to the outer side surfaces of the side wall portions 51d, 51d in the front-rear direction. The bottom surface portion 51c is formed with a fastener mounting hole 51e configured by a female screw hole, and an elastic member 52b is attached to the bottom surface of the bottom surface portion 51c. The elastic members 52a, 52a, 52b are made of plate-shaped rubber, for example. In this example, the elastic member 52b is arranged in front of the fastener mounting hole 51e on the lower surface of the bottom surface portion 51c.

The dimension between the front and rear outer surfaces of the pair of front and rear elastic members 52a, 52a is slightly smaller than the inner diameter dimension of the lower beam member 9 in the front-rear direction. Also, the dimension from the upper ends of the side walls 51d, 51d to the lower surface of the elastic member 52b is slightly smaller than the inner diameter dimension of the lower beam member 9 in the vertical direction. That is, the projecting member 51b and the elastic members 52a, 52a, 52b are configured to be insertable into the center side end portion 9c of the lower beam member 9. As shown in FIG.

On the bottom surface 9a of the lower beam member 9, there are fastener insertion holes 9e corresponding to the positions of the fastener mounting holes 51e, and a portion of the fastener insertion hole 9e extending from the central side end 9c. Notch grooves 9f extending toward the left and right edges are formed. The front-to-rear width of the notch groove 9f is shorter than the diameter of the fastener insertion hole 9e, and the open edge of the notch groove 92 is formed into a tapered shape (broadening shape).

When the lower beam member 9 is assembled to the intermediate leg portion 31 with the above configuration, first, the threaded portion 53a of the fastener 53, which is a decorative screw that can be hand-tightened, is incompletely inserted into the fastener attachment hole 51e of the bottom portion 51c. screwed to. When the lower beam member 9 is slid laterally toward the intermediate leg portion 31 , the lower surface portion 9 a is positioned between the head portion 53 b of the fastener 53 and the bottom surface portion 51 c of the beam connecting fitting 51 . As a result, the center side end portion 9c of the lower beam member 9 is fitted to the beam connecting fitting 51 while the lower surface portion 9a of the lower beam member 9 is engaged with the head portion 53b of the fastener 53 via the notch groove 9f. Let

When the center side end portion 9c of the lower beam member 9 is fitted so as to cover the projecting member 51b and the elastic members 52a, 52a, 25b, the fastener 53 is screwed upward, and the head portion 53b of the fastener 53 is screwed upward. Part of it is inserted into the fastener insertion hole 9 e of the lower beam member 9 . The diameter of the head 53b of the fastener 53 is shorter than the diameter of the fastener insertion hole 9e and longer than the front-rear width of the notch groove 9f.

Here, when tightening the fastener 53, for example, the intermediate leg portion 31 is erected on the floor surface, that is, the bottom surface portion 51c of the beam connecting fitting 51 and the lower surface portion 9a of the lower beam member 9 face the floor surface. In this state, the head 53b of the fastener 53 is rotated by inserting a finger or a tool between the lower surface portion 9a and the floor surface. In this manner, the fastener 53 can be tightened and loosened using the space between the lower surface portion 9a and the floor surface. The tightening and loosening work of the fastener 53 is performed with the intermediate leg 31 turned upside down or sideways (with the lower surface of the grounding leg 7 facing upward or sideways). may

When the lower beam member 9 is connected to the intermediate leg portion 31, the head portion 53b of the fastener 53 is loosely fitted into the fastener insertion hole 9e, and the pair of left and right side wall portions 51d of the beam connecting metal fitting 51. , 51d and the lower beam member 9, elastic members 52a, 52a are arranged. Therefore, due to the gap between the head 53b of the fastener 53 and the fastener insertion hole 9e, the beam connecting fitting 51 and the center side end 9c of the lower beam member 9 are connected so as to be relatively displaceable in the front-rear direction and the left-right direction. It is That is, the center side end portion 9c of the lower beam member 9 is connected to the lower portion of the intermediate leg portion 31 and is configured to be displaceable relative to the lower portion of the intermediate leg portion 31 in the front-back direction and the left-right direction.

Further, when the lower beam member 9 is connected to the intermediate leg portion 31, the head portion 53b of the fastener 53 is loosely fitted in the fastener insertion hole 9e, and the bottom portion 51c of the beam connecting fitting 51 is An elastic member 52b is arranged between the lower beam member 9 and the elastic member 52b. Therefore, since the head portion 53b of the fastener 53 can move vertically with respect to the fastener insertion hole 9e, the beam connecting metal fitting 51 and the center side end portion 9c of the lower beam member 9 are vertically moved relative to each other. Displaceably connected. That is, the center side end portion 9c of the lower beam member 9 is connected to the lower portion of the intermediate leg portion 31 and is configured to be displaceable with respect to the lower portion of the intermediate leg portion 31 in the vertical direction.

Although the embodiments of the present invention have been described above, the present invention can be embodied in various other ways, and various modifications can be made without departing from the scope of the present invention.

For example, in the above-described embodiment, the top plate portion 2 includes two top plates 2A and 2B, but the top plate portion may be formed of one top plate. Further, the shape of the top plate in a plan view is not limited to a substantially rectangular shape, and may be other shapes such as a trapezoidal shape and an elliptical shape. Further, two or more intermediate legs may be arranged between the pair of end legs.
[Appendix]
In recent years, there has been a demand for a larger top plate in desks with a liftable top plate. In general, a desk with a liftable top plate is provided with a pair of end legs with lifting units that support both edges in the width direction of the top plate. In addition to insufficient strength of the parts, the weight of the top plate increases, so there is a problem that the top plate cannot be moved up and down smoothly with only a pair of left and right lifting units.
[Appendix 1]
The desk with a liftable top plate of Supplementary Note 1 includes a top plate portion having a top plate, a pair of end leg portions supporting both edges in the width direction of the top plate portion, and a pair of end leg portions disposed between the pair of end legs. each of the end legs and the intermediate legs has a lifting unit for moving the top plate in the vertical direction, and the intermediate leg connects the top plate and the intermediate legs. The support portion includes a pair of front-rear beam members that are spaced apart in the width direction and attached to the lower surface of the top plate, respectively, and a connection beam member that connects the front-rear direction beam members. The intermediate leg is attached.
In the desk with an elevating top plate of Supplementary Note 1, the intermediate leg portion having the elevating unit is connected to the intermediate support portion having a pair of front-to-rear beam members and a connecting beam member connecting them to support the central portion of the top plate portion. Therefore, even if the top plate is enlarged, the top plate can be moved up and down smoothly by the intermediate leg portion and the pair of end leg portions. Furthermore, the intermediate support portion improves the strength of the central portion of the top plate portion and firmly fixes the intermediate leg portion to the top plate portion. As a result, the desk with a liftable top plate of Supplementary Note 1 can cope with an increase in the size of the top plate. In addition, since the intermediate legs that support the central portion of the top plate are firmly fixed to the top plate, the load against the rolling of the top plate is transferred to the connection points between the end legs and the top plate and the intermediate legs. Since it is distributed to the connection points between the parts and the top plate, it is possible to reduce the rolling of the top plate and prevent damage to members and loosening of bolts at these connection points.
[Appendix 2]
In the above desk with a liftable top plate, the top plate portion includes a plurality of top plates connected in the width direction, and the pair of front-rear direction beam members of the intermediate support portion comprise a pair of adjacent top plates. may be attached to the bottom surface of the top plate across the boundary of the top plate.
In this aspect, in the intermediate support portion, the front-rear direction beam member is attached to each top plate with respect to the pair of adjacent top plates, and the front-rear direction beam members are connected by the connection beam member. The connecting part of the top plate can be firmly fixed by the intermediate support part. Furthermore, since the intermediate support portion is supported by the intermediate leg portions, the top plate portion in which a plurality of top plates are connected can be supported by the intermediate leg portions with high rigidity. Moreover, by dividing the top plate into a plurality of top plates, the manufacture, transportation, and storage of the top plate can be facilitated.
[Appendix 3]
Further, the intermediate leg may be arranged below the boundary.
In this aspect, it is possible to support the top plate section in which a plurality of top plates are connected with each other in a well-balanced manner. In addition, when viewed from the front-rear direction, the boundary between the adjacent top plates and the intermediate leg portion match in the vertical direction, so the appearance is improved.
[Appendix 4]
Further, the connecting beam member may be fixed to each lower surface of the pair of adjacent top plates.
In this aspect, since the connecting beam member is fixed to both of the pair of adjacent top plates, the connection points of the adjacent top plates can be fixed more firmly.
[Appendix 5]
Further, the desk with a liftable top plate described in the supplementary description further includes a unit support member that supports a control unit that controls the operation of the lift unit, and the unit support member connects the pair of front-rear direction beam members. can be
In this aspect, the control unit can be arranged compactly between the pair of longitudinal beam members, and the pair of longitudinal beam members can be more strongly connected by the unit supporting member.
[Appendix 6]
Further, the desk with a liftable top plate described above may include a lower connecting member that connects the lower portion of the end leg portion and the lower portion of the intermediate leg portion.
In this aspect, since the lower portions of the adjacent legs are connected by the lower connecting member, the strength of the support structure of the top plate portion is improved, so that the top plate portion is reduced in lateral swaying.
[Appendix 7]
Furthermore, at least one of both ends of the lower connecting member may be connected to the leg so as to be displaceable.
In this aspect, at least one of the ends of the lower connecting member is displaced with respect to the legs during operation of the lifting unit, thereby reducing the load applied to the lifting unit and allowing the top plate to move up and down smoothly.

1 Desk with Elevating Top Plate 2 Top Plate Part 2d Boundary 2A, 2B Top Plate 4 Elevating Unit 5 End Leg 6 Control Unit 9 Lower Beam Member (Lower Connecting Member)
31 Intermediate leg portion 32 Intermediate support portion 33 Front-back direction beam member 34 Connection beam member 36 Control unit accommodation beam member (unit support member)

Claims (5)

First and second top plates that are connected in the left-right direction, an electric lifting type first pedestal that supports one of the left and right sides of the first top plate from below, and the other left and right sides of the second top plate that can be lifted downward. An electric lifting type second pedestal that supports from the top, and an electric lifting type third pedestal that supports the connecting part of the top plate from below,
The lower end of the first pedestal has a first grounding leg that extends forward and backward across the first pedestal, and the lower end of the second pedestal has a first grounding leg that extends forward and backward across the second pedestal. a second grounding leg, and a third grounding leg extending back and forth across the third pedestal at the lower end of the third pedestal;
The first grounding leg and the third grounding leg are connected by a first lower beam member extending in the left-right direction, and the second grounding leg and the third grounding leg are extended in the left-right direction. connected by a second lower beam member;
A desk with an adjustable top. The first grounding leg is provided with a first connecting portion protruding left and right inward toward the third grounding leg,
The second grounding leg is provided with a second connecting portion projecting left and right inward toward the third grounding leg,
The third grounding leg is provided with a pair of left and right third connecting portions projecting outward toward the first and second grounding legs,
one end side of the first lower beam member is connected to the first connecting portion, and the other end side of the first lower beam member is connected to one of the right and left sides of the third connecting portion;
one end side of the second lower beam member is connected to the other left and right of the third connecting portion, and the other end side of the second lower beam member is connected to the second connecting portion;
A desk with a liftable top plate according to claim 1. Each of the connecting portions is positioned on each of the ground legs on an extension line of the corresponding pedestal when viewed in the left-right direction.
3. The desk with a liftable top plate according to claim 2. The upper side of each pedestal is attached to a support frame attached to the lower side of each top plate,
4. The desk with a liftable top plate according to any one of claims 1 to 3 . each of the lower beam members is connected to a front-rear central portion of the side wall of each of the ground legs,
The side wall portion of each of the grounding legs is formed so that the height dimension of the center portion in the front-rear direction is larger than the height dimension of both end portions in the front-rear direction,
5. The desk with a liftable top plate according to any one of claims 1 to 4.

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