Chair

Abstract

To provide a chair capable of suppressing a deformation or damage in a wiring insertion member.SOLUTION: A chair comprises: a lower structure body including a plurality of leg support members 21 which are arranged on an arrangement surface F and provided by separation in a horizontal direction and an installation member K which is extending in the horizontal direction so as to connect the leg support members 21 being adjacent in the horizontal direction; a seat member which is supported from below by the lower structure body and has a seat surface on which a user sits; and a wiring insertion member 40 extending in a vertical direction, extending downward from the installation member K, having a lower end 40b to have contact with the arrangement surface F, and including a wiring insertion space 40s partially at least in the vertical direction. The wiring insertion member 40 permits a vertically relative displacement of the lower end 40b of the wiring insertion member 40 and the installation member K in accordance with the vertical displacement of the installation member K with respect to the arrangement surface F.SELECTED DRAWING: Figure 7

Description

Technical Field

[0001] The present invention relates to a chair.

Background Art

[0002] For example, Patent Document 1 discloses a chair including a pair of support legs provided on a floor surface, a longitudinally long connecting portion in the width direction connecting the pair of support legs, a seating member supported by the connecting portion, and a power supply unit that supplies power to the outside. In this chair, the power supply unit is grounded on the floor surface between the pair of support legs and is connected to the connecting portion. The wiring is led from the connecting portion into the power supply unit. In this way, by inserting the wiring through the power supply unit between the connecting portion and the floor surface, the exposure of the wiring to the outside is suppressed.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the configuration disclosed in Patent Document 1, the power supply unit (wiring insertion member) installed on the floor surface and through which the wiring is inserted is connected to the connecting portion. Therefore, when the connecting portion is deformed so as to bend downward due to the load or the like applied by the seated person sitting on the seating member, the load is transmitted to the power supply unit, and there is a risk of deformation, damage, etc. of the power supply unit. An object of the present invention is to provide a chair capable of suppressing deformation and damage of a wiring insertion member.

Means for Solving the Problems

[0005] In order to solve the above problems, the present invention adopts the following aspects. (1) The chair according to one aspect of the present invention includes a lower structure provided on an installation surface and including a plurality of support leg members spaced apart in the left-right direction, and a bridging member extending in the left-right direction and connecting the adjacent support leg members in the left-right direction, a seating member supported from below by the lower structure and having a seating surface on which a user sits, and a wiring insertion member extending downward from the bridging member and having a lower end grounded to the installation surface and having a wiring insertion space at least in a part in the vertical direction. The wiring insertion member is configured to allow a displacement of the bridging member in the vertical direction with respect to the lower end in accordance with a displacement of the bridging member in the vertical direction with respect to the installation surface. According to this aspect, for example, when the bridging member is deformed so as to bend downward in accordance with the load of the user sitting on the seating member or the like, the wiring insertion member allows a relative displacement in the vertical direction between the lower end and the bridging member in accordance with the displacement of the bridging member in the vertical direction with respect to the installation surface. For example, in the case where the wiring insertion member is configured not to allow a relative displacement in the vertical direction between the lower end and the bridging member, when the bridging member bends downward, a compressive force in the vertical direction acts on the wiring insertion member, and the wiring insertion member may be deformed or damaged. Further, due to unevenness of the floor surface or the like, a force may act on the wiring insertion member itself to displace it upward or incline it. In contrast, by allowing the wiring insertion member to allow a relative displacement in the vertical direction between the lower end and the bridging member, deformation and damage of the wiring insertion member can be suppressed.

[0006] (2) In the chair according to the aspect (1) above, the wiring insertion member includes an upper member having an upper end connected to the bridging member and extending in the vertical direction, and a lower member having the lower end and extending in the vertical direction. At least one of the upper member and the lower member is formed with the wiring insertion space extending in the vertical direction, and it is preferable that the other member of the upper member and the lower member is inserted into the one member so as to be movable in the vertical direction with respect to the one member. According to this aspect, by inserting the other of the upper member and the lower member into the wiring insertion space of at least one of the upper member and the lower member, relative displacement in the vertical direction between the upper member having an upper end and the lower member having a lower end is allowed. Thereby, it is allowed that the erection member is deformed so as to bend downward, and deformation and damage of the wiring insertion member are suppressed.

[0007] (3) In the chair according to the aspect of (2) above, each of the upper member and the lower member has a cylindrical portion that forms a wiring insertion space extending in the vertical direction, and it is preferable that one of the cylindrical portions of the upper member and the lower member is inserted inside the other cylindrical portion of the upper member and the lower member. According to this aspect, since each of the upper member and the lower member has a cylindrical portion that forms a wiring insertion space, by inserting the wiring into the wiring insertion space of the upper member and the wiring insertion space of the lower member, it is possible to suppress the wiring from being exposed. By inserting one of the cylindrical portions of the upper member and the lower member inside the other cylindrical portion of the upper member and the lower member, the wiring insertion member has a so-called telescopic structure. Thereby, a configuration is realized in which relative displacement in the vertical direction between the lower end of the wiring insertion member and the erection member is allowed, it is allowed that the erection member is deformed so as to bend downward, and deformation and damage of the wiring insertion member are suppressed.

[0008] (4) In the chair according to the aspect of (3) above, it is preferable that an elastic spacer member that can be compressed and deformed in a direction intersecting the vertical direction is provided between the inner peripheral surface of one of the cylindrical portions of the upper member and the lower member and the outer peripheral surface of the other cylindrical portion of the upper member and the lower member. According to this aspect, relative displacement in the vertical direction between the upper member and the lower member of the telescopic structure is performed more smoothly.

[0009] (5) In the chair according to the aspect (4) above, on at least one of the inner peripheral surface of one of the tubular portions of the upper member and the lower member, and the outer peripheral surface of the other tubular portion of the upper member and the lower member, a coating film made of a paint containing a material having a lower coefficient of friction than the tubular portion is formed, and the tubular portion on which the coating film is formed preferably consists of a plurality of divided bodies divided in a direction intersecting the vertical direction. According to this aspect, by forming a coating film made of a paint containing a material having a lower coefficient of friction than the tubular portion, the relative displacement in the vertical direction between the upper member and the lower member of the telescopic structure is performed more smoothly. Such a coating film can be easily formed by painting. Also, by configuring the tubular portion from a plurality of divided bodies, it is possible to easily form a coating film on the inner peripheral surface of the tubular portion by painting.

[0010] (6) In the chair according to any one of the aspects (1) to (5) above, the wiring insertion member preferably includes a tubular body forming a wiring insertion space extending in the vertical direction and an elastic deformable body elastically deformable in the vertical direction. According to this aspect, a configuration is realized in which the relative displacement in the vertical direction between the lower end of the wiring insertion member and the erection member is allowed by the elastic deformation of the deformable body in the vertical direction.

[0011] (7) In the chair according to any one of the aspects (1) to (6) above, the erection member includes a connecting member connecting the leg members adjacent to each other in the left - right direction, and a wiring accommodation member that extends in the left - right direction while being supported by the connecting member and has a wiring accommodation space for accommodating wiring. The upper end of the wiring insertion member is preferably connected to the wiring accommodation member, and the accommodation space and the wiring insertion space communicate with each other. According to this aspect, since the upper end of the wiring insertion member is connected to the wiring accommodation member and the accommodation space and the wiring insertion space communicate with each other, it is possible to suppress the wiring from being exposed to the outside. Here, since the wiring housing member is supported by the connecting member, it may be displaced in the vertical direction following the bending deformation of the connecting member. Since the upper end of the wiring insertion member is connected to the wiring housing member, even if the wiring housing member is displaced in the vertical direction together with the connecting member, the wiring insertion member can allow relative displacement in the vertical direction between the lower end and the installation member.

[0012] (8) In the chair according to the aspect of (7) above, further comprising an electrical component unit disposed above the upper surface of the connecting member and having an electrical output portion, and it is preferable that the wiring led out downward from the electrical component unit is accommodated in the accommodation space. According to this aspect, it is possible to suppress the wiring connected to the electrical components of the electrical component unit from being exposed to the outside.

Effects of the Invention

[0013] According to one aspect of the present invention, deformation and damage of the wiring insertion member can be suppressed.

Brief Description of the Drawings

[0014]

Figure 1

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Figure 8

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Figure 10

Figure 11

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Figure 17

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Figure 21

Figure 22

Figure 23

Mode for Carrying Out the Invention

[0015] Hereinafter, with reference to the accompanying drawings, a mode for carrying out the chair according to the present invention will be described. However, the present invention is not limited only to this embodiment.

[0016] (First Embodiment) FIG. 1 is a perspective view of a chair 1A according to a first embodiment of the present invention as viewed from the front. FIG. 2 is a perspective view of the chair 1A according to the first embodiment of the present invention as viewed from the rear. FIG. 3 is a side view of the chair 1A according to the first embodiment of the present invention. As shown in FIGS. 1 to 3, the chair 1A includes a chair body 2 and a power supply unit 3. The chair body 2 includes a lower structure 20 installed on an installation surface F such as a floor or the ground, and a plurality of seating members 25.

[0017] In the following description, for convenience, the direction in which the seated person sitting on the seating member 25 faces forward is referred to as “front”, and the opposite direction is referred to as “rear” or “back side”. Further, the direction connecting the installation surface F side on which the chair 1A is installed and the opposite side is referred to as the “vertical direction”. Further, the left - right direction of the chair 1A as viewed from the seated person, that is, the horizontal direction orthogonal to the front - rear direction as viewed from the vertical direction is referred to as the “left - right direction”.

[0018] The lower structure 20 has a plurality of leg members 21 and a connecting member (erecting member) 22. The plurality of leg members 21 are provided at intervals in the left - right direction. In the present embodiment, for example, two leg members 21 are provided, but the leg members 21 may include three or more.

[0019] Each leg member 21 is provided on the installation surface F. As shown in FIGS. 3 to 5, each leg member 21 includes a main body portion 23 and a clamp member 24. The main body portion 23 has a pair of leg portions 23f that branch and extend in the front-rear direction downward. The front leg portion 23f is inclined so as to gradually face forward as it goes downward, and the rear leg portion 23f is inclined so as to gradually face rearward as it goes downward. An adjuster 23c having a height adjustment function is provided at the lower end of each leg portion 23f.

[0020] As shown in FIG. 3, at the upper end portion of the main body portion 23 (the collective portion of the leg portions 23f), a lower accommodation groove 23s that is recessed downward and in which the lower portion of the connecting member 22 is accommodated is formed. The upper portion of the connecting member 22 protrudes upward from the upper surface of the main body portion 23. On the lower surface of the clamp member 24, an upper accommodation groove 24s that is recessed upward and in which the upper portion of the connecting member 22 is accommodated is formed. The clamp member 24 accommodates the upper portion of the connecting member 22 in the upper accommodation groove 24s and is connected to the main body portion 23 via bolts (not shown) or the like with the lower surface facing the upper surface of the main body portion 23.

[0021] The connecting member 22 extends in the left-right direction and connects the support leg members 21 adjacent to each other in the left-right direction. In the present embodiment, the connecting member 22 is in the shape of a square tube extending in the left-right direction. The connecting member 22 has a vertically long rectangular shape in which the height in the up-down direction is larger than the width in the front-rear direction.

[0022] As shown in FIGS. 1 and 2, in the present embodiment, the seating members 25 are provided, for example, four at intervals in the left-right direction. The number of the seating members 25 may be one, or may be two, three, or five or more. As shown in FIG. 3, the seating member 25 is provided above the connecting member 22. The seating member 25 includes a seat portion 26 and a backrest 27. The seat portion 26 has a seat member 261 facing upward and having a seating surface 26f on which a seated person sits, and a base member 262 provided below the seat member 261. The seat portion 26 is fixed via a pair of support brackets 28 fixed to the connecting member 22 by fixing means such as welding. The pair of support brackets 28 are provided spaced apart in the left-right direction. As shown in FIG. 4, each support bracket 28 has locking portions 28k, 28j that project downward in front of and behind the connecting member 22. The locking portion 28k abuts against the connecting member 22 from the front, and the locking portion 28j abuts against the connecting member 22 from the rear. The locking portions 28k, 28j are fixed to the connecting member 22 by means such as welding, thereby restraining the forward and backward movement of the support bracket 28. The pair of support brackets 28 are joined to the base member 262 via bolts or the like. Thereby, the seating member 25 is supported from below by the connecting member 22 via the support brackets 28. The backrest 27 extends upward from the rear end portion of the seat portion 26. The upper portion of the backrest 27 extends obliquely rearward upward. As shown in FIG. 3, the connecting member 22 is below the central portion in the front-rear direction within the entire range of the seating member 25 including from the front end portion of the seat portion 26 to the rear end portion of the backrest 27, and is located below a portion slightly rearward of the central portion in the front-rear direction of only the seat portion 26.

[0023] FIG. 6 is a perspective view of the lower structure 20 of the chair 1A and the power supply unit 3 according to the embodiment of the present invention as viewed from the front. FIG. 7 is a perspective view of the lower structure 20 of the chair 1A and the power supply unit 3 according to the embodiment of the present invention as viewed from the rear. FIG. 6 is a perspective view of the power supply unit 3 of the chair 1A according to the embodiment of the present invention as viewed from the front. FIG. 7 is a cross-sectional view taken along the arrow VII-VII in FIG. 6. In FIG. 6, for the sake of explanation, a state in which the front wall portion 311f of one of the electrical component units 31A in the left-right direction and the lid 352 of the wiring housing member 35 are removed is shown. As shown in FIGS. 4 to 7, the power supply unit 3 includes an electrical component unit 31A, an intermediate wiring housing member 33A, a wiring housing member (erection member) 35, and a wiring insertion member 40. As shown in FIG. 1, the electrical component unit 31A is provided laterally of the seating member 25 in the left - right direction. In the present embodiment, the electrical component unit 31A is disposed between adjacent seating members 25 in the left - right direction. Note that the electrical component unit 31A may be disposed laterally outside the seating member 25 located at the left - right outermost end of the chair 1A.

[0024] As shown in FIGS. 4 to 7, the electrical component unit 31A is supported on the connecting member 22 via the intermediate wiring housing member 33A. The electrical component unit 31A has a unit main body portion 311 and a front extending portion 312. As shown in FIG. 3, when viewed from the left - right direction, the unit main body portion 311 extends obliquely rearward upward from near the rear end portion of the seat portion 26. In the illustrated example, the unit main body portion 311 extends along the backrest 27. The unit main body portion 311 is formed in a hollow box shape that opens downward. Specifically, as shown in FIG. 6, the unit main body portion 311 has a pair of side wall portions 311d provided at intervals in the left - right direction, a front wall portion 311f connecting the front end portions of the pair of side wall portions 311d, a rear wall portion 311b connecting the rear end portions of the pair of side wall portions 311d, and an upper wall portion 311t connecting the upper end portions of the pair of side wall portions 311d. Note that in the illustrated example, the upper wall portion 311t of the unit main body portion 311 is located at the same height as the intermediate portion in the up - down direction of the backrest 27.

[0025] As shown in FIGS. 6 and 7, the unit main body 311 has an electrical output unit 32 on the front wall 311f. The electrical output unit 32 is various electrical components that output the power supplied from the outside via the wiring 100. In this embodiment, a power strip box 320 is provided as the electrical output unit 32. The power strip box 320 is provided with, for example, a power outlet connection port 321 to which a power plug of an electronic device can be connected, and a USB port 322 to which a connector provided at the end of a USB cable can be connected.

[0026] As shown in FIG. 7, the wiring 100 connected to the electrical output unit 32 (power outlet connection port 321, USB port 322) is accommodated in the space 311s inside the unit main body 311. The lower end 311u of the unit main body 311 is connected to the intermediate wiring accommodating member 33A. The wiring 100 is led out into the internal space 33s in the intermediate wiring accommodating member 33A through the lower end opening of the unit main body 311.

[0027] The front extension 312 extends forward from the lower end 311u of the unit main body 311. A plate member 313 extending in the front-rear direction is provided on the front extension 312. The upper surface of the plate member 313 constitutes an article placement surface 313t facing upward. As shown in FIG. 1, various articles can be placed on the plate member 313 between adjacent seat portions 26. Also, as shown in FIG. 1, in this embodiment, the plate member 313 is disposed in the space S between the opposing edges in the left-right direction of the adjacent seating members 25 in the left-right direction, and also has a function of preventing articles from accidentally falling downward from this space S.

[0028] As shown in FIG. 7, the intermediate wiring accommodating member 33A is provided below the electrical component unit 31A and supports the electrical component unit 31A from below. The electrical component unit 31A and the intermediate wiring accommodating member 33A are provided at positions shifted in the left-right direction with respect to the seating member 25 among the connecting members 22. The intermediate wiring housing member 33A has a fixing fitting 331 and a housing member body 332. The fixing fitting 331 is placed on the connecting member 22 and extends forward and backward with respect to the connecting member 22. The fixing fitting 331 has a locking portion 331k that protrudes downward in front of the connecting member 22. The locking portion 331k abuts against the connecting member 22 from the front and is fixed to the connecting member 22 by means such as welding, thereby restraining the backward movement of the fixing fitting 331. The electric component unit 31A is provided on such a fixing fitting 331 and is bolted.

[0029] The housing member body 332 is provided behind the connecting member 22. The housing member body 332 is bolted to the rear end portion of the fixing fitting 331. The housing member body 332 is formed in a hollow box shape that opens upward.

[0030] FIG. 8 is a view of the joint portion between the intermediate wiring housing member 33A and the end portion of the wiring housing member 35 as seen from the rear, and is a sectional view taken along the arrow VII-VII in FIG. 5. As shown in FIGS. 7 and 8, the housing member body 332 has a pair of side wall portions 332d provided at intervals in the left-right direction, a front wall portion 332f connecting the front end portions of the pair of side wall portions 332d, a rear wall portion 332b connecting the rear end portions of the pair of side wall portions 332d, and a bottom wall portion 332t connecting the lower end portions of the pair of side wall portions 332d.

[0031] The internal space 33s of the housing member body 332 communicates vertically with the space 311s in the unit main body portion 311 and houses the wiring 100 led out downward from the space 311s of the electric component unit 31A. The bottom wall portion 332t of the housing member body 332 is provided at the same height as the lower end of the connecting member 22 or at a position higher than the lower end of the connecting member 22. Thereby, the housing member body 332 (intermediate wiring housing member 33A) is not exposed below the connecting member 22 when viewed from the front.

[0032] The front wall 332f of the accommodating member main body 332 abuts against the connecting member 22 from behind, restricting the forward movement of the intermediate wiring accommodating member 33A. In this manner, the intermediate wiring accommodating member 33A is disposed so as to sandwich the connecting member 22 from the front and rear between the locking portion 331k and the accommodating member main body 332, and restricts the forward and rearward movement of the electric component unit 31A and the wiring accommodating member 35 supported by the intermediate wiring accommodating member 33A. As shown in FIG. 8, one side wall portion 32d of the accommodating member main body 332 is formed with a through hole 332h penetrating the side wall portion 332d in the left-right direction.

[0033] As shown in FIG. 5 and FIG. 7, the wire housing member 35 is disposed behind the connecting member 22. The wire housing member 35 is generally in the shape of a rectangular tube extending in the left-right direction, and has a housing space 35s inside. When viewed from the front, the wire housing member 35 overlaps at least a part of the wire housing member 35 in the vertical direction with the connecting member 22. In this embodiment, the wire housing member 35 is provided so that the entire wire housing member 35 overlaps the connecting member 22 in the vertical direction when viewed from the front. As shown in FIG. 7, the vertical height dimension H2 of the wire housing member 35 is smaller than the vertical height dimension H1 of the connecting member 22. The wire housing member 35 is provided below the seating member 25, and is provided at a position overlapping the seating member 25 when viewed from above. In other words, the wire housing member 35 does not protrude rearward beyond the rear end of the seating member 25. In this way, since the wire housing member 35 is disposed behind the connecting member 22, when the chair 1A is viewed from the rear, the wire housing member 35 is disposed behind the connecting member 22, which makes it easy to perform tasks such as storing the wires in the storage space 35s, improving maintainability. In addition, as shown in Fig. 7, the space between the lower surface of the seat portion 26 of the seating member 25 and the installation surface F functions as a work space Z for introducing the wires 100 into the wire housing member 35 and for performing tasks such as leading the wires 100 out of the wire housing member 35.

[0034] 9 is a cross-sectional view of the wire housing member 35 of the chair 1A according to the embodiment of the present invention, seen from the left-right direction. The cross-sectional view is taken along the line IX-IX in FIG. As shown in FIGS. 8 and 9, in the present embodiment, the wiring housing member 35 has a wiring member main body 351 and a lid body 352.

[0035] When viewed from the left - right direction, the wiring member main body 351 has a U - shaped opening upward, and includes a bottom plate portion 351d, a front plate portion 351f rising upward from the front end portion of the bottom plate portion 351d, and a rear plate portion 351b rising upward from the rear end portion of the bottom plate portion 351d. The wiring member main body 351 forms an accommodation space 35s in the space surrounded by the bottom plate portion 351d, the front plate portion 351f, and the rear plate portion 351b. Note that the upper end of the front plate portion 351f is located above the upper end of the rear plate portion 351b.

[0036] As shown in FIG. 8, the end portions on both sides in the left - right direction of the wiring member main body 351 are inserted into the accommodation member main body 332 through the through - holes 332h respectively. The end portions on both sides in the left - right direction of the wiring member main body 351 are fixed to the bottom wall portion 332t in the accommodation member main body 332 via bolts (not shown). Note that the connection structure of the wiring member main body 351 to the accommodation member main body 332 is not limited to the example shown here and can be changed as appropriate.

[0037] As shown in FIGS. 8 and 9, the lid body 352 is provided so as to cover the accommodation space 35s of the wiring member main body 351 from above. As shown in FIG. 5, the lid body 352 extends in the left - right direction between the intermediate wiring accommodation member 33A on one side in the left - right direction and the intermediate wiring accommodation member 33A on the other side in the left - right direction. The end portions in the left - right direction of the lid body 352 are not inserted into the intermediate wiring accommodation member 33A, but may be inserted. The lid body 352 closes the entire portion where the accommodation space 35s of the wiring member main body 351 opens upward between the intermediate wiring accommodation member 33A on one side in the left - right direction and the intermediate wiring accommodation member 33A on the other side in the left - right direction. As shown in FIG. 9, when viewed from the left - right direction, the lid body 352 has an inverted U - shaped opening downward, and includes an upper plate portion 352t, a front locking portion 352f extending downward from the front end portion of the upper plate portion 352t, and a rear locking portion 352b extending downward from the rear end portion of the upper plate portion 352t.

[0038] With the lid 352 covering the accommodation space 35s from above, the upper plate portion 352t is placed on the upper ends of the front plate portion 351f and the rear plate portion 351b, and is inclined obliquely downward from the front to the rear. With the lid 352 covering the accommodation space 35s from above, the front locking portion 352f is along the front surface of the front plate portion 351f. With the lid 352 covering the accommodation space 35s from above, the rear locking portion 352b is along the rear surface of the rear plate portion 351b. The lid 352 is detachably fixed to the wiring member body 351 by fastening the rear locking portion 352b to the rear plate portion 351b via bolts (not shown). When performing maintenance, after removing the bolts (not shown), the lid 352 can be removed upward to open the upper part of the accommodation space 35s. When the left and right ends of the lid 352 are inserted into the intermediate wiring accommodation member 33A, after shifting one end of the lid 352 in the left-right direction to the other in the left-right direction and pulling it out from the intermediate wiring accommodation member 33A, it is lifted upward, and further, by shifting the other end of the lid 352 in the left-right direction to one side in the left-right direction and pulling it out from the intermediate wiring accommodation member 33A, the lid 352 can be removed.

[0039] As described above, the connecting member 22 is located below a portion behind the center in the front-rear direction of the seat portion 26 in the seating member 25, and the wiring accommodation member 35 is located further behind the connecting member 22. That is, the area of the seat portion 26 covering the work space Z from above is smaller behind the connecting member 22 than in front. Therefore, it is easy to perform maintenance work on the wiring accommodation member 35 itself and the wiring 100 inside the wiring accommodation member 35. When a support bracket 28 or the like is provided above the lid 352, it is preferable to make the vertical height dimension H3 of the front locking portion 352f smaller than the vertical gap S between the upper end of the lid 352 and the support bracket 28.

[0040] In this way, the wiring accommodation member 35 is connected to the connecting member 22 via the intermediate wiring accommodation member 33A, and the wiring accommodation member 35, together with the connecting member 22, constitutes an erection member K that connects the leg members 21 adjacent to each other in the left-right direction. As shown in FIG. 8, the accommodation space 35s of such a wiring accommodation member 35 communicates with the internal space 33s of the intermediate wiring accommodation member 33A through the through holes 332h at both left and right end portions of the wiring accommodation member 35 in the left-right direction. Thereby, the wiring 100 led downward from the electric component unit 31A is accommodated in the accommodation space 35s through the internal space 33s.

[0041] As shown in FIG. 6, the wiring insertion member 40 is provided below the wiring accommodation member 35. In the present embodiment, the wiring insertion member 40 extends downward from the intermediate portion in the left-right direction of the wiring accommodation member 35. The position of the wiring insertion member 40 in the left-right direction can be changed as appropriate. As shown in FIG. 7, the wiring insertion member 40 extends in the vertical direction and has a wiring insertion space 40s communicating with the accommodation space 35s. The wiring insertion member 40 guides the wiring 100 accommodated in the accommodation space 35s downward through the wiring insertion space 40s.

[0042] The upper end 40t of the wiring insertion member 40 is connected to the wiring accommodation member 35 constituting the erection member K. The lower end 40b of the wiring insertion member 40 is installed on the installation surface F.

[0043] FIG. 10 is a perspective view showing the wiring insertion member 40 of the chair 1A according to the first embodiment of the present invention. As shown in FIGS. 6, 7, and 10, in the present embodiment, the wiring insertion member 40 includes an upper member 41 and a lower member 42.

[0044] As shown in FIG. 10, the upper member 41 has an upper cylindrical portion 41c and a pair of flange portions 41f. The upper cylindrical portion 41c is a rectangular cylindrical shape extending in the vertical direction. The pair of flange portions 41f constitute the upper end 40t of the wiring insertion member 40. The flange portion 41f intersects the upper end portion of the upper cylindrical portion 41c in the vertical direction and extends, for example, in the left - right direction. As shown in FIG. 7, the flange portion 41f is connected to the lower surface of the wiring accommodation member 35 (bottom plate portion 351d) by bolts or the like (not shown). An opening 351h communicating with the upper end opening of the upper cylindrical portion 41c is formed in the bottom plate portion 351d of the wiring accommodation member 35. The upper member 41 is connected to the bottom plate portion 351d in a state where the upper cylindrical portion 41c surrounds the periphery of the opening 351h in plan view. Thereby, the accommodation space 35s and the wiring insertion space 40s communicate with each other through the opening 351h. Note that the opening 351h and the upper end opening of the upper cylindrical portion 41c only need to overlap at least partially in plan view.

[0045] As shown in FIG. 10, the lower member 42 has a lower cylindrical portion 42c and a grounding member 42g. The lower cylindrical portion 42c is a rectangular cylindrical shape extending in the vertical direction. The grounding member 42g constitutes the lower end 40b of the wiring insertion member 40. The grounding member 42g is made of, for example, resin and is provided at the lower end of the lower cylindrical portion 42c. The lower member 42 is grounded to the installation surface F via the grounding member 42g.

[0046] FIG. 11 is a cross - sectional view taken along the line XII - XII in FIG. 10. As shown in FIG. 11, the lower cylindrical portion 42c is coaxially arranged on a common axis along the vertical direction with the upper cylindrical portion 41c, and is formed in a rectangular tube shape with a similar shape that is smaller in outer shape in plan view than the upper cylindrical portion 41c. The upper end portion of the lower cylindrical portion 42c is inserted into the upper cylindrical portion 41c from below. By communicating the internal spaces of the cylindrical portions 41c and 42c with each other, a wiring insertion space 40s is formed in the wiring insertion member 40 over the entire vertical direction. The wiring 100 introduced into the upper member 41 from the opening 351h is guided into the lower member 42. That is, among the wiring insertion member 40, the inner space of the upper cylindrical portion 41c constitutes the upper part of the wiring insertion space 40s, and the inner space of the lower cylindrical portion 42c constitutes the lower part of the wiring insertion space 40s. Note that the upper cylindrical portion 41c and the lower cylindrical portion 42c do not necessarily have to be similar shapes, such as a combination of a cylinder and a rectangular tube. Further, a configuration may be adopted in which the lower end portion of the upper cylindrical portion 41c is inserted into the lower cylindrical portion 42c from above.

[0047] As shown in FIGS. 6, 7, and 10, at the lower end portion of the lower cylindrical portion 42c, a communication opening 42h that communicates the inside and outside of the lower cylindrical portion 42c is formed in one of the plurality of side surfaces of the rectangular tube-shaped lower cylindrical portion 42c (the side surface facing one side in the left-right direction). The wiring 100 inserted into the wiring insertion space 40s is led out to the outside of the wiring insertion member 40 through the communication opening 42h and is disposed along the installation surface F.

[0048] As shown in FIG. 11, in such a wiring insertion member 40, a predetermined clearance is formed between the outer peripheral surface of the lower cylindrical portion 42c and the inner peripheral surface of the upper cylindrical portion 41c. Thereby, the lower cylindrical portion 42c and the upper cylindrical portion 41c are relatively displaceable in the vertical direction. That is, the wiring insertion member 40 has a so-called telescopic structure. Due to the load of the seated person sitting on the seating member 25, aging changes, etc., the middle part of the connecting member 22 in the left - right direction may elastically deform so as to bend downward. Along with this, in the wiring accommodation member 35 attached to the connecting member 22 via the middle wiring accommodation member 33A, displacement downward in the vertical direction may occur in the wiring accommodation member 35. Also, when the elastically deformed connecting member 22 returns to its original shape, displacement upward may occur in the wiring accommodation member 35 following this restoration. In such a case, since the lower member 42 and the upper member 41 are relatively displaceable in the vertical direction, the wiring insertion member 40 can expand and contract in the vertical direction following the vertical displacement of the wiring accommodation member 35, and relative displacement in the vertical direction between the lower end 40b of the wiring insertion member 40 and the erection member K is permitted.

[0049] FIG. 12 is a perspective exploded view showing the component configuration of the wiring insertion member 40 of the chair 1A according to the first embodiment of the present invention. As shown in FIGS. 11 and 12, an elastic spacer member 45 made of a material that can be compressed and deformed in a direction intersecting the vertical direction is provided between the upper cylindrical portion 41c and the lower cylindrical portion 42c. In the present embodiment, as the elastic spacer member 45, a pad 46 made of, for example, felt is provided on the outer peripheral surface of the upper end portion of the lower cylindrical portion 42c. The pad 46 is adhered to each of the four side surfaces of the lower cylindrical portion 42c by, for example, an adhesive, a double - sided adhesive tape, etc. The thickness of the pad 46 is slightly larger than the clearance between the inner peripheral surface of the upper cylindrical portion 41c and the outer peripheral surface of the lower cylindrical portion 42c. Note that the elastic spacer member 45 may be formed of a material having a lower coefficient of friction than the material forming the cylindrical portions 41c, 42c (for example, steel).

[0050] Further, a coating film 47 is formed on the inner peripheral surface of the upper cylindrical portion 41c. The paint contains a resin component including a pigment and a solvent. The resin component including the pigment contains resins such as urethane, acrylic, and epoxy, which are materials having a lower coefficient of friction than the cylindrical portions 41c and 42c. When the inner peripheral surface of the cylindrical portion 41c is coated with such a paint, the solvent contained in the paint volatilizes, and the resin component including the content hardens, thereby forming the coating film 47. That is, the coating film 47 is a resin (including) film and has a lower coefficient of friction than the material (for example, steel material) forming the cylindrical portions 41c and 42c. When the lower member 42 and the upper member 41 are relatively displaced in the vertical direction, the pad 46 provided on the lower cylindrical portion 42c slidably contacts the coating film 47 provided on the upper cylindrical portion 41c, so that the lower member 42 and the upper member 41 are smoothly relatively displaced in the vertical direction.

[0051] As shown in FIGS. 10 and 12, in the present embodiment, the upper member 41 on the inner peripheral surface of which the coating film 47 is formed is composed of a plurality of, for example, two divided bodies 41A and 41B divided in a direction intersecting the vertical direction. Note that the number of divided bodies constituting the upper member 41 is not limited to two, and may be three or more.

[0052] One of the divided bodies 41A is C-shaped when viewed from the vertical direction and has a first plate portion 411, a second plate portion 412, and a third plate portion 413 that form three of the four side surfaces of the upper cylindrical portion 41c. The second plate portion 412 and the third plate portion 413 are orthogonal to the first plate portion 411 and extend forward from both ends in the left-right direction of the first plate portion 411. As shown in FIG. 12, a space 41s surrounded by the first plate portion 411, the second plate portion 412, and the third plate portion 413, which are arranged in a C-shape when viewed from the vertical direction, is formed in the divided body 41A. The flange portion 41f is provided at the upper ends of the second plate portion 412 and the third plate portion 413. In addition, a pair of bent pieces 412m and 413m bent inward in the left-right direction are formed at the front end portions of the second plate portion 412 and the third plate portion 413.

[0053] The other divided body 41B is flat plate-shaped and forms the remaining one of the four side surfaces of the upper cylindrical portion 41c. At the upper end portion of the divided body 41B, a pair of locking pieces 414 protruding outward in the left and right directions are formed. Further, at the lower end portion of the divided body 41B, a protruding portion 415 protruding outward in the left and right directions and a pair of connecting pieces 416 extending rearward from the outer ends of the protruding portion 415 in the left and right directions are formed. The divided body 41B is sandwiched between the front ends of the second plate portion 412 and the third plate portion 413 with a pair of locking pieces 414 and a pair of protruding portions 415 abutted against the front ends of the second plate portion 412 and the third plate portion 413, and between the front ends of the second plate portion 412 and the third plate portion 413 and a pair of bent pieces 412m, 413m. The divided body 41B is connected to the divided body 41A by fastening each of the pair of connecting pieces 416 along the outer surfaces of the second plate portion 412 and the third plate portion 413 with screws or the like (not shown). In a state where the divided body 41B is connected to the divided body 41A, a space 41s surrounded by the first plate portion 411, the second plate portion 412, and the third plate portion 413 of the divided body 41A is closed from the side by the divided body 41B, and an inner space of the upper cylindrical portion 41c that constitutes a part of the wiring insertion space 40s is formed.

[0054] In this way, by forming the upper member 41 from the divided bodies 41A and 41B, painting can be performed with the divided bodies 41A and 41B separated, and the coating film 47 can be easily formed. Note that the upper member 41 is composed of the divided bodies 41A and 41B. However, if painting for forming the coating film 47 can be easily performed, the configuration of the divided bodies 41A and 41B can be appropriately changed. Also, if the coating film 47 can be favorably formed on the entire inner peripheral surface of the upper cylindrical portion 41c, the upper member 41 may be formed as a single member.

[0055] As described above, in this embodiment, the chair 1A includes a lower structure 20 provided on the installation surface F and including a plurality of leg members 21 provided at intervals in the left-right direction, and a connecting member 22 extending in the left-right direction and connecting the leg members 21 adjacent to each other in the left-right direction; a seating member 25 supported from below by the lower structure 20 and having a seating surface 26f on which a user sits; and a wiring insertion member 40 extending in the vertical direction, having an upper end 40t connected to the installation member K and a lower end 40b grounded on the installation surface F, and having a wiring insertion space 40s at least in a part of the vertical direction. The wiring insertion member 40 is configured to allow a vertical displacement of the installation member K in the vertical direction with respect to the lower end 40b of the wiring insertion member 40 in accordance with the vertical displacement of the installation member K with respect to the installation surface F. According to this configuration, when the installation member K is deformed, for example, bent downward due to the load of the user sitting on the seating member 25 or due to aging, etc., the wiring insertion member 40 allows a relative vertical displacement between the lower end 40b of the wiring insertion member 40 and the installation member K in accordance with the vertical displacement of the installation member K with respect to the installation surface F. For example, in the case where the wiring insertion member 40 is configured not to allow a relative vertical displacement between the lower end 40b of the wiring insertion member 40 and the installation member K, when the installation member K is displaced in the vertical direction, a vertical compressive force acts on the wiring insertion member 40, and the wiring insertion member 40 may be deformed or damaged. Further, due to unevenness of the floor surface or the like, a force may act on the wiring insertion member 40 itself to displace it upward or incline it. In contrast, by allowing the wiring insertion member 40 to allow a relative vertical displacement between the lower end 40b of the wiring insertion member 40 and the installation member K, deformation and damage of the wiring insertion member 40 can be suppressed.

[0056] In this embodiment, the wiring insertion member 40 includes an upper member 41 having an upper end 40t and extending in the vertical direction, and a lower member 42 having a lower end 40b and extending in the vertical direction. A wiring insertion space 40s extending in the vertical direction is formed in the upper member 41 and the lower member 42, and the lower member 42 is inserted into the upper member 41 so as to be vertically movable with respect to the upper member 41. According to this configuration, relative displacement in the vertical direction between the upper member 41 having an upper end 40t and the lower member 42 having a lower end 40b is allowed. Thereby, it is allowed that the erection member K is deformed so as to bend downward, and deformation and damage of the wiring insertion member 40 are suppressed.

[0057] In the present embodiment, each of the upper member 41 and the lower member 42 has cylindrical portions 41c and 42c that form a wiring insertion space 40s extending in the vertical direction, and the lower cylindrical portion 42c is inserted inside the upper cylindrical portion 41c. According to this configuration, since the upper member 41 and the lower member 42 have the cylindrical portions 41c and 42c that form the wiring insertion space 40s, by inserting the wiring 100 into the wiring insertion space 40s of the upper member 41 and the wiring insertion space 40s of the lower member 42, it is possible to suppress the wiring 100 from being exposed. Since the lower cylindrical portion 42c is inserted inside the upper cylindrical portion 41c, the wiring insertion member 40 has a so-called telescopic structure. Thereby, a configuration is realized in which relative displacement in the vertical direction between the lower end 40b of the wiring insertion member 40 of the wiring insertion member 40 and the erection member K is allowed, and it is allowed that the erection member K is deformed so as to bend downward, and deformation and damage of the wiring insertion member 40 are suppressed.

[0058] In the present embodiment, an elastic spacer member 45 is provided between the inner peripheral surface of the upper cylindrical portion 41c and the outer peripheral surface of the lower cylindrical portion 42c. According to this configuration, relative displacement in the vertical direction between the upper member 41 and the lower member 42 of the telescopic structure is performed more smoothly.

[0059] In the present embodiment, a coating film 47 made of a paint containing a material having a lower coefficient of friction than the upper cylindrical portion 41c is formed on the inner peripheral surface of the upper cylindrical portion 41c, and the upper cylindrical portion 41c on which the coating film 47 is formed is composed of a plurality of divided bodies 41A and 41B divided in a direction intersecting the vertical direction. According to this configuration, by forming a coating film 47 made of a paint containing a material with a lower coefficient of friction than the upper cylindrical portion 41c, the relative displacement in the vertical direction between the upper member 41 and the lower member 42 of the telescopic structure can be performed more smoothly. Such a coating film 47 can be easily formed by coating the inner peripheral surface of the upper cylindrical portion 41c. By configuring the upper cylindrical portion 41c from a plurality of divided bodies 41A and 41B, the formation of the coating film 47 by coating the inner peripheral surface of the upper cylindrical portion 41c can be easily performed.

[0060] In the present embodiment, the erection member K further includes a connecting member 22 that connects the leg members 21 adjacent to each other in the left - right direction, and a wiring accommodation member 35 that extends in the left - right direction while being supported by the connecting member 22 and has an accommodation space 35s for accommodating the wiring 100. The upper end 40t of the wiring insertion member 40 is connected to the wiring accommodation member 35, and the accommodation space 35s and the wiring insertion space 40s communicate with each other. According to this configuration, since the upper end 40t of the wiring insertion member 40 is connected to the wiring accommodation member 35 and the accommodation space 35s and the wiring insertion space 40s communicate with each other, it is possible to suppress the wiring 100 from being exposed to the outside. Since the wiring accommodation member 35, which is the erection member K, is supported by the connecting member 22, it may be displaced in the vertical direction following the deflection deformation of the connecting member 22. Since the upper end 40t of the wiring insertion member 40 is connected to the wiring accommodation member 35, when the wiring accommodation member 35 deforms, for example, bends downward together with the connecting member 22, the wiring insertion member 40 can allow the relative displacement in the vertical direction between the lower end 40b of the wiring insertion member 40 and the erection member K.

[0061] In the present embodiment, in the chair 1A, an electrical component unit 31A, which is disposed above the upper surface of the connecting member 22 and includes an electrical output unit 32, is further provided, and the wiring 100 led out downward from the electrical component unit 31A is accommodated in the accommodation space 35s. According to this configuration, it is possible to suppress the wiring 100 connected to the electrical components of the electrical component unit 31A from being exposed to the outside.

[0062] (Modification of the First Embodiment) FIG. 13 is a perspective view of a chair 1B according to a modification of the first embodiment of the present invention as viewed from the front. As shown in FIG. 13, the chair 1B includes a chair body 2B and a power supply unit 3B.

[0063] The chair body 2B of the present embodiment includes a lower structure 20 and a plurality of seating members 25. In the present embodiment, for example, two seating members 25 are provided at intervals in the left - right direction. On one side (for example, the right side) in the left - right direction of each seating member 25, a table 50 is provided. Each table 50 faces upward and has an article placement surface 50f on which articles can be placed.

[0064] FIG. 14 is a perspective view of the lower structure of the chair 1B and the power supply unit 3B according to a modification of the embodiment of the present invention as viewed from the front. As shown in FIG. 14, the table 50 is supported by a connecting member 22 via a pair of support brackets 52 provided at intervals in the left - right direction. Each support bracket 52 extends in the front - rear direction straddling the connecting member 22.

[0065] FIG. 15 is a perspective view of the lower structure 20 of the chair 1B and the power supply unit 3 according to a modification of the embodiment of the present invention as viewed from the rear. FIG. 16 is a perspective view of the power supply unit 3 of the chair 1B according to a modification of the embodiment of the present invention as viewed from the front. FIG. 17 is a cross - sectional view of the power supply unit 3 of the chair 1B according to a modification of the embodiment of the present invention as viewed from the left - right direction. As shown in FIGS. 14 to 17, the power supply unit 3B includes an electric component unit 31B, an intermediate wiring housing member 33B, a wiring housing member 35, and a wiring insertion member 40. As shown in FIGS. 13 and 17, the electric component unit 31B is provided at the rear end portion of the table 50. The electric component unit 31B has a unit main body portion 316 and a front extending portion 317.

[0066] As shown in Fig. 17, the unit main body 316 is formed in a hollow box shape as a whole, and a space 316s is formed inside thereof. Specifically, when viewed from the left - right direction, the unit main body 316 integrally has a head portion 316a that protrudes upward from the rear end portion of the table 50 and a downward extending portion 316b that extends downward behind the table 50 from the head portion 316a. The head portion 316a has a trapezoidal cross - sectional shape when viewed from the left - right direction. The downward extending portion 316b has a rectangular parallelepiped shape extending downward from the head portion 316a.

[0067] As shown in Fig. 16, the head portion 316a is provided with a front wall portion 316f that obliquely faces upward toward the front. The unit main body 316 has an electrical output portion 32 on the front wall portion 316f. In this embodiment, a power outlet box 320 is provided as the electrical output portion 32. The power outlet box 320 is provided with, for example, a power outlet connection port 321 and a USB port 322.

[0068] As shown in Fig. 17, a wiring 100 connected to the electrical output portion 32 (power outlet connection port 321, USB port 322) is accommodated in the space 316s inside the unit main body 316. As shown in Fig. 16, a communication opening 316h that communicates with the space 316s and through which the wiring 100 in the space 316s can be led out is formed on the front surface of the downward extending portion 316b.

[0069] The front extending portion 317 extends forward from the downward extending portion 316b of the unit main body 316. The rear end portion of the front extending portion 317 is connected to the downward extending portion 316b via bolts (not shown) or the like. The front extending portion 317 integrally has a plate portion 317a having a rectangular shape in plan view that extends along a plane intersecting the vertical direction and a pair of rising walls 317b that rise upward from both left - right sides of the plate portion 317a. The plate portion 317a is provided below the communication opening 316h. A through - hole 317h that penetrates the plate portion 317a vertically is formed in the plate portion 317a.

[0070] As shown in FIG. 14, the front extension portion 317 is disposed between a pair of support brackets 52, and a pair of rising walls 317b are connected to the pair of support brackets 52 by bolts or the like (not shown). That is, the electric component unit 31B is supported on the connecting member 22 via the support brackets 52.

[0071] As shown in FIG. 17, a space 317s communicating with the space 316s in the unit main body portion 316 is formed between the plate portion 317a of the front extension portion 317, the pair of rising walls 317b, and the lower surface of the table 50.

[0072] As shown in FIGS. 16 and 17, the intermediate wiring housing member 33B is in a hollow box shape and is provided below the plate portion 317a. The intermediate wiring housing member 33B has a rectangular parallelepiped shape with the vertical direction as the longitudinal direction and is connected to the lower surface of the plate portion 317a by bolts or the like (not shown). The lower end of the intermediate wiring housing member 33B is provided at the same height as the lower end of the connecting member 22 or at a position higher than the lower end of the connecting member 22. Thereby, the intermediate wiring housing member 33B is not exposed below the connecting member 22 when viewed from the front.

[0073] The internal space 33t of the intermediate wiring housing member 33B communicates with the spaces 316s and 317s in the electric component unit 31B through the through hole 317h. The internal space 33t houses the wiring 100 led downward from the spaces 316s and 317s of the electric component unit 31B through the through hole 317h. The intermediate wiring housing member 33B has a through hole 33h on one side surface in the left-right direction.

[0074] As shown in FIG. 13, the electric component unit 31B and the intermediate wiring housing member 33B are provided at positions shifted in the left-right direction with respect to the seating member 25 in the connecting member 22.

[0075] As shown in FIGS. 15 and 17, the wiring accommodation member 35 is disposed behind the connecting member 22. As a whole, the wiring accommodation member 35 has a rectangular tube shape extending in the left-right direction, and has an accommodation space 35s inside thereof. The wiring accommodation member 35 has a wiring member main body 351 and a lid body 352.

[0076] Such an accommodation space 35s of the wiring accommodation member 35 communicates with the internal space 33t of the intermediate wiring accommodation member 33B through through-holes 33h at both left and right ends of the wiring accommodation member 35 in the left-right direction. Thereby, the wiring 100 led out downward from the electric component unit 31B is accommodated in the accommodation space 35s through the internal space 33t.

[0077] The wiring insertion member 40 is provided below the wiring accommodation member 35. The wiring insertion member 40 extends in the vertical direction and has a wiring insertion space 40s communicating with the accommodation space 35s. The wiring insertion member 40 guides the wiring 100 accommodated in the accommodation space 35s downward through the wiring insertion space 40s.

[0078] In the above first embodiment, the wiring 100 is configured to be guided from the electric component units 31A and 31B through the wiring accommodation member 35 into the wiring insertion space 40s in the wiring insertion member 40, but it is not limited thereto. The wiring 100 may be guided from the electric component units 31A and 31B into the wiring insertion member 40, for example, along the lower side of the seat portion 26 of the seating member 25 without passing through the wiring accommodation member 35. In such a case, the configuration may be such that the wiring accommodation member 35 is not provided.

[0079] Also, in the above embodiment, the wiring member main body 351 forms an accommodation space 35s that opens upward, and the lid body 352 covers the accommodation space 35s from above, but it is not limited thereto. For example, the wiring member main body 351 may form an accommodation space 35s that opens rearward, and the lid body 352 may cover the accommodation space 35s from the rear. Further, the wiring member main body 351 may form an accommodation space 35s that opens upward and rearward, and the lid body 352 may cover the accommodation space 35s from above and the rear. In addition, although the lid 352 is detachably attached to the wiring member main body 351 by bolts (not shown), it is not limited thereto. The lid 352 may be rotatably connected to the wiring member main body 351 via a hinge or the like to open and close the accommodation space 35s. Note that the lid 352 is not an essential component. Furthermore, as long as the wiring insertion member 40 has an accommodation space 35s that extends in the left - right direction and accommodates the wiring 100, it may be, for example, a non - openable and closable cylindrical shape or the like.

[0080] (Second Embodiment) Next, a second embodiment of the chair according to the present invention will be described. In the second embodiment described below, components common to the above - described second embodiment are denoted by the same reference numerals in the drawings and their description is omitted. FIG. 18 is a perspective view of the chair 1C according to the second embodiment of the present invention as seen from the front. As shown in FIG. 18, the chair 1C includes a chair main body 2C and a power supply unit 3C. The chair main body 2C includes a lower structure 20C installed on an installation surface F such as a floor or the ground, and a plurality of seating members 25C.

[0081] FIG. 19 is a perspective view of the lower structure 20C and the power supply unit 3C of the chair 1C according to the second embodiment of the present invention as seen from the front. As shown in FIGS. 18 and 19, the lower structure 20C has a plurality of support leg members 21C provided at intervals in the left - right direction, and a connecting member 22C as an erection member K that extends in the left - right direction and connects adjacent support leg members 21C in the left - right direction. In the present embodiment, for example, two support leg members 21C are provided, but the number of support leg members 21C can be changed as appropriate.

[0082] Each leg member 21C has a pair of legs 29 that branch and extend downward in the front-rear direction from the upper end connected to the connecting member 22C. The front leg 29 is inclined so as to gradually face forward as it goes downward, and the rear leg 29 is inclined so as to gradually face rearward as it goes downward. An adjuster 29c having a height adjustment function is provided at the lower end of each leg 29.

[0083] As shown in FIG. 18, the seating member 25C is provided above the connecting member 22C. The seating member 25C includes a seat portion 26 and a backrest 27. As shown in FIG. 19, the seat portion 26 is fixed via a pair of support brackets 28C fixed on the connecting member 22C. The pair of support brackets 28C are provided spaced apart in the left-right direction. The seating member 25C is supported from below by the connecting member 22C via the support brackets 28C.

[0084] FIG. 20 is a side sectional view of the chair 1C according to the second embodiment of the present invention. As shown in FIGS. 19 and 20, the power supply unit 3C includes an electric component unit 31C and a wiring insertion member 40. As shown in FIG. 18, the electric component unit 31C is provided laterally of the seating member 25C in the left-right direction. In the present embodiment, the electric component unit 31C is disposed between adjacent seating members 25C in the left-right direction. Note that the electric component unit 31C may be disposed outside the seating member 25C located at the leftmost or rightmost end of the chair 1C in the left-right direction.

[0085] As shown in FIGS. 19 and 20, the electric component unit 31C is supported on the connecting member 22C via a support bracket 38. The electric component unit 31C is formed in a hollow box shape. The electric component unit 31C has a unit main body portion 318 and a front extending portion 319. As shown in FIG. 18, when viewed from the left - right direction, the unit main body 318 extends obliquely rearward upward from near the rear end of the seat part 26. In the illustrated example, the unit main body 318 extends along the backrest 27. In the illustrated example, the upper end of the unit main body 318 is located at the same height as the middle part in the vertical direction of the backrest 27. As shown in FIGS. 19 and 20, the unit main body 318 has an electrical output part 32 on the front wall part 318f. The front extension part 319 extends forward from the lower end of the unit main body 318. The front extension part 319 is provided below the seat part 26 in the vertical direction between the adjacent seating members 25C in the left - right direction.

[0086] As shown in FIG. 20, in the space 31d in the electrical component unit 31C, a wiring 100 connected to the electrical output part 32 (power outlet connection port 321, USB port 322) is accommodated. The wiring 100 is led out laterally through an opening 319h formed on one side surface in the left - right direction of the front extension part 319. As shown in FIG. 19, a cover 319k for covering the wiring 100 led out laterally from the opening 319h is provided on the side surface of the front extension part 319.

[0087] The wiring 100 led out laterally from the front extension part 319 is introduced into the connecting member 22C and is accommodated in the connecting member (erecting member) 22C. As shown in FIG. 20, in the present embodiment, the connecting member 22C has a pair of beams 200, a lower fixing member 250, and an upper fixing member 280.

[0088] The pair of beams 200 are provided at intervals in the front - rear direction. The pair of beams 200 are formed in a shape that is line - symmetric in the front - rear direction. Each beam 200 extends in the left - right direction. Each beam 200 is formed by extrusion molding using a raw material such as aluminum.

[0089] Each beam 200 has a first convex portion 201, a second convex portion 203, and a third convex portion 205. In the beam 200 arranged in the front, each of the first convex portion 201, the second convex portion 203, and the third convex portion 205 protrudes forward. In the beam 200 arranged in the front, a first concave portion 202 that is recessed rearward is formed between the first convex portion 201 and the second convex portion 203, and a second concave portion 204 that is recessed rearward is formed between the second convex portion 203 and the third convex portion 205. In the beam 200 arranged in the rear, each of the first convex portion 201, the second convex portion 203, and the third convex portion 205 protrudes rearward. In the beam 200 arranged in the rear, a first concave portion 202 that is recessed forward is formed between the first convex portion 201 and the second convex portion 203, and a second concave portion 204 that is recessed forward is formed between the second convex portion 203 and the third convex portion 205.

[0090] In addition, an inclined surface 207 is formed at the lower part of each beam 200. In the beam 200 arranged in the front, the inclined surface 207 is formed on the rear surface of the beam 200 and extends obliquely rearward from top to bottom. In the beam 200 arranged in the rear, the inclined surface 207 is formed on the front surface of the beam 200 and extends obliquely forward from top to bottom.

[0091] FIG. 21 is a view of a joint portion between the support structure 21C and the connecting member 22C in the chair 1C according to the second embodiment of the present invention as viewed from the left-right direction. At the upper end portion (the collective portion of the legs 29) of the leg member 21C, a receiving groove 29s that is recessed downward and houses the lower part of the connecting member 22C is formed. In the receiving groove 29s, the lower parts of a pair of beams 200 are housed. In the receiving groove 29s of the leg member 21C, a concave portion 292 that meshes with the first convex portion 201 and a convex portion 293 that meshes with the first concave portion 202 are formed. With the lower parts of a pair of beams 200 housed in the receiving groove 29s, the beam 200 arranged in the front and the beam 200 arranged in the rear are arranged with a space therebetween in the front-rear direction. The upper end portion of the leg member 21C is joined to a block 295 inserted between the lower parts of a pair of beams 200 arranged with a space therebetween in the front-rear direction in the receiving groove 29s via a bolt 296.

[0092] As shown in FIG. 20, a plurality of upper fixing members 280 are provided at intervals in the left - right direction. Each upper fixing member 280 has a connecting member 281 and a pair of clamp members 282. The upper part of each beam 200 protrudes upward from the accommodation groove 29s. The connecting member 281 extends in the front - rear direction and is placed on a pair of beams 200. A protrusion 263 protruding downward is formed in the middle part of the connecting member 281 in the front - rear direction. The protrusion 263 is inserted between the pair of beams 200 and restricts the displacement of the upper end parts of the pair of beams 200 in the direction of approaching each other in the front - rear direction. The pair of clamp members 282 have engaging claws 264 that engage with the third convex portions 205 of the front and rear beams 200. The pair of clamp members 282 are connected in front of and behind the connecting member 281 by bolts or the like (not shown). The pair of clamp members 282 sandwich the pair of beams 200 in the front - rear direction. The upper fixing member 280 of the present embodiment also functions as the support brackets 28C and 38. The upper fixing member 280 may be provided at a position other than the support brackets 28C and 38.

[0093] As shown in FIG. 19, the space between the pair of beams 200 is closed by an upper cover 272 and a lower cover (not shown). The upper cover 272 closes the gap between the upper end parts of the pair of beams 200. The lower cover 271 closes the gap between the lower end parts of the pair of beams 200. As shown in FIG. 20, in the connecting member 22C, an internal space 22d extending in the left - right direction is formed in the portion surrounded by the front and rear beams 200, the upper cover 272 (see FIG. 19), and the lower cover. The wiring 100 led out laterally from the front - extending portion 319 is accommodated in the internal space 22d in the connecting member 22C.

[0094] As shown in FIG. 19, the wiring insertion member 40 is provided below the connecting member 22C. In the present embodiment, the wiring insertion member 40 extends downward from the middle part of the connecting member 22C in the left - right direction. The position of the wiring insertion member 40 in the left - right direction can be changed as appropriate. As shown in FIG. 20, the upper end 40t of the wiring insertion member 40 is connected to the connecting member 22C using the lower fixing member 250. A plurality of lower fixing members 250 are provided at intervals in the left - right direction. Each lower fixing member 250 has a protrusion 251 disposed between the inclined surface 207 of the front beam 200 and the inclined surface 207 of the rear beam 200 within the accommodation groove 29s. The protrusion 251 is formed in an inverted trapezoidal shape whose width in the front - rear direction gradually decreases from top to bottom. The upper end 40t of the wiring insertion member 40 is fixed to the lower fixing member 250 by a bolt (not shown). As shown in FIG. 19, the lower end 40b of the wiring insertion member 40 is installed on the installation surface F. The wiring insertion member 40 extends in the vertical direction and has a wiring insertion space 40s that communicates with the internal space 22d. The wiring insertion member 40 guides the wiring 100 accommodated in the internal space 22d downward through the wiring insertion space 40s.

[0095] Thus, in this embodiment, the chair 1C includes a lower structure 20C provided on the installation surface F, the lower structure 20C including a plurality of support leg members 21C provided at intervals in the left - right direction and a connecting member 22C that extends in the left - right direction and connects adjacent support leg members 21C in the left - right direction; a seating member 25C supported from below by the lower structure 20C and having a seating surface 26f on which a user sits; and a wiring insertion member 40 that extends in the vertical direction and has an upper end 40t connected to the connecting member 22C which is an erection member K and a lower end 40b grounded on the installation surface F, and has a wiring insertion space 40s at least in a part of the vertical direction. The wiring insertion member 40 is configured such that a relative displacement in the vertical direction between the upper end 40t and the lower end 40b occurs in response to a displacement in the vertical direction of the erection member K (connecting member 22C), and a relative displacement in the vertical direction between the lower end 40b of the wiring insertion member 40 and the erection member K is allowed. According to this configuration, similar to the first embodiment, by allowing the wiring insertion member 40 to have a relative displacement in the vertical direction between the lower end 40b of the wiring insertion member 40 and the erection member K, deformation and damage of the wiring insertion member 40 can be suppressed.

[0096] (Modification of the Second Embodiment) In the above-described embodiment, the pair of beams 200 constituting the connecting member 22C has been described. However, the cross-sectional shape of the beam 200 can be changed as appropriate. Further, as long as the connecting member 22C has an internal space 22d in which the wiring 100 is accommodated, its structure can be changed as appropriate. Without using the pair of beams 200, for example, it may be in a cylindrical shape extending in the left-right direction, a U-shaped cross-section, or the like.

[0097] (Modifications of the First and Second Embodiments) For example, in the above-described embodiment, the wiring insertion member 40 having the wiring insertion space 40s is cylindrical. However, at least one of the upper member 41 and the lower member 42 is not limited to a cylindrical shape and may be, for example, U-shaped in a plan view. Further, the lower member 42 inserted into the upper member 41 is not limited to a cylindrical shape and may be a columnar (rod-shaped) or the like.

[0098] In the above-described first and second embodiments, the telescopic structure is exemplified as the wiring insertion member 40. However, it is not limited to this. As long as the wiring insertion member 40 is configured to allow a relative displacement in the vertical direction between the lower end 40b of the wiring insertion member 40 and the erection member K in accordance with the vertical displacement of the erection member K with respect to the installation surface F, it may be of other configurations as appropriate. For example, as shown in FIG. 22, the wiring insertion member 40D may include a cylindrical body 450 and an elastically deformable body 451.

[0099] The cylindrical body 450 extends in the vertical direction to form a wiring insertion space 40k. The elastically deformable body 451 is, for example, attached to the lower end portion of the cylindrical body 450. The elastically deformable body 451 is formed of a material that can be elastically deformed in the vertical direction, such as a sponge, rubber, or bellows-shaped cylinder. The elastically deformable body 451 may be cylindrical with the same cross-sectional shape as the cylindrical body 450, or may be a solid block shape. The upper end 45t of the wiring insertion member 40D is connected to the wiring accommodation member 35 and the connecting member 22C as the erection member K, and the lower end 45b is grounded to the installation surface F. The elastic deformable body 451 elastically deforms in the vertical direction in response to the vertical displacement of the erection member K with respect to the installation surface F, and allows relative displacement in the vertical direction between the upper end 45t and the lower end 45b.

[0100] According to this configuration, when the elastic deformable body 451 elastically deforms in the vertical direction, a configuration is realized in which relative displacement in the vertical direction between the upper end 45t and the lower end 45b of the wiring insertion member 40D is allowed. Thereby, deformation and damage of the wiring insertion member 40D can be suppressed.

[0101] Note that the cylindrical body 450 of the wiring insertion member 40D may have an upper and lower two-part structure, and the elastic deformable body 451 may be provided so as to be sandwiched between the upper cylindrical body and the lower cylindrical body.

[0102] Also, as shown in FIG. 23, a wiring insertion member 40E that extends downward from the erection member K and forms a wiring insertion space 40j may be provided. The upper end portion 40p of this wiring insertion member 40E is inserted downward into the erection member K from an opening 210 formed on the lower surface of the erection member K, and is capable of relative displacement in the vertical direction with respect to the erection member K within the opening 210. The lower end 40b of the wiring insertion member 40E is grounded to the installation surface F. Since the lower end 40b of such a wiring insertion member 40E is grounded to the installation surface F, even if the erection member K is displaced in the vertical direction, the state where the lower end 40b is grounded to the installation surface F is maintained. Thereby, the wiring insertion member 40E will be displaced relative to the erection member K in the vertical direction. That is, in response to the vertical displacement of the erection member K with respect to the installation surface F, the lower end 40b of the wiring insertion member 40 and the erection member K are displaced relative to each other in the vertical direction. Thereby, deformation and damage of the wiring insertion member 40E can be suppressed.

[0103] (Other Embodiments) As described above, the preferred embodiments of the present invention have been described, but the present invention is not limited to these embodiments. Additions, omissions, substitutions, and other changes to the configuration are possible without departing from the spirit of the present invention. The present invention is not limited by the above description, but is limited only by the appended claims. For example, in the above-described embodiment, the upper ends 40t and 45t of the wiring insertion members 40 and 40D are connected to the wiring accommodation member 35 or the connection member 22C as the erection member K, but the present invention is not limited to this. The erection member K that connects the upper ends 40t and 45t of the wiring insertion members 40 and 40D may be the connection member 22 that connects the leg members 21 to each other, or may be another member connected to the connection members 22 and 22C.

[0104] In the above-described embodiment, as the electric output unit 32, an outlet box 320 including an outlet connection port 321 and a USB port 322 is provided, but the present invention is not limited to this. The electric output unit 32 may be other electric components such as lighting and speakers, for example. In the above-described embodiment, the configuration in which the electric component units 31A to 31C are provided on the chairs 1A to 1C has been described, but the present invention is not limited to this configuration. In addition, the wiring 100 inserted into the wiring insertion members 40 and 40D is not limited to the electric component units 31A to 31C, and may be led from other locations. For example, the wiring 100 led out from other electrical products, electrical equipment, etc. installed near the chairs 1A to 1C may be inserted into the wiring insertion members 40 and 40D. In addition, within the scope not departing from the gist of the present invention, it is possible to appropriately replace the components in the above-described embodiment with well-known components, and the above-described various modified examples may be appropriately combined.

Explanation of Reference Numerals

[0105] 1A to 1C... Chairs 20, 20C... Lower structures 21, 21C... Leg members 22, 22C... Connection members 25, 25C... Seating members 26f... Seating surface 31A to 31C... Electric component units 32... Electric output unit 35... Wiring accommodation member 35s... Accommodation space 40, 40D, 40E... Wiring insertion members 40k, 40s... Wiring insertion space 40t, 45t... Upper end 40b, 45b... Lower end 41... Upper member 41A, 41B... Divided bodies 41c... Upper cylindrical part 42... Lower member 42c... Lower cylindrical part 45... Elastic spacer part 47... Coating film 100... Wiring 450... Cylindrical body 451... Elastic deformed body F... Installation surface K... Erection member

Claims

1. A lower structure including a plurality of support leg members provided on an installation surface and spaced apart in the left-right direction, and a laying member extending in the left-right direction and connecting the adjacent support leg members in the left-right direction, a seating member supported from below by the lower structure and having a seating surface on which a user sits, and a wiring insertion member extending downward from the laying member, having a lower end grounded to the installation surface, and having a wiring insertion space at least in a part in the vertical direction, wherein the wiring insertion member is configured to allow displacement of the laying member in the vertical direction with respect to the lower end in accordance with displacement of the laying member in the vertical direction with respect to the installation surface Chair.

2. The wiring insertion member, has an upper end connected to the laying member and an upper member extending in the vertical direction, has the lower end and a lower member extending in the vertical direction, wherein the wiring insertion space extending in the vertical direction is formed in at least one of the upper member and the lower member, and the other member of the upper member and the lower member is inserted into the one member so as to be movable in the vertical direction with respect to the one member The chair according to claim 1.

3. Each of the upper member and the lower member has a cylindrical portion forming a wiring insertion space extending in the vertical direction, wherein one of the cylindrical portions of the upper member and the lower member is inserted inside the other cylindrical portion of the upper member and the lower member The chair according to claim 2.

4. An elastic spacer member capable of being compressed and deformed in a direction intersecting the vertical direction is provided between the inner peripheral surface of one of the cylindrical portions of the upper member and the lower member and the outer peripheral surface of the other cylindrical portion of the upper member and the lower member The chair according to claim 3.

5. A coating film made of a paint containing a material having a lower coefficient of friction than the cylindrical portion is formed on at least one of the inner peripheral surface of one of the cylindrical portions of the upper member and the lower member and the outer peripheral surface of the other cylindrical portion of the upper member and the lower member, and the cylindrical portion on which the coating film is formed is composed of a plurality of divided bodies divided in a direction intersecting the vertical direction The chair according to claim 4.

6. The wiring insertion member, includes a cylindrical body forming a wiring insertion space extending in the vertical direction, and an elastically deformable body elastically deformable in the vertical direction The chair according to claim 1.

7. The laying member, is a connecting member that connects the adjacent support leg members in the left-right direction, A wiring accommodation member that extends in the left-right direction while being supported by the connecting member and has an accommodation space for accommodating wiring. The upper end of the wiring insertion member is connected to the wiring accommodation member, and the accommodation space and the wiring insertion space communicate with each other. The chair according to claim 1 or 2.

8. An electrical component unit that is disposed above the upper surface of the connecting member and includes an electrical output unit. The wiring led out downward from the electrical component unit is accommodated in the accommodation space. The chair according to claim 7.

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