Connecting equipment and chair set

Abstract

To provide a novel connection device which can connect two chairs with a predetermined interval held therebetween.SOLUTION: A connection device for connecting two chairs arranged side by side with an interval provided therebetween, includes at least two connection parts and an interval holding part. The at least two connection parts are connected to respective different chairs. The interval holding part connects the at least two connection parts with a predetermined interval held therebetween.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a connecting device and a chair set.

Background Art

[0002] When arranging chairs in a multipurpose hall or the like, a connecting mechanism for connecting chairs arranged in the left - right direction is known in consideration of appearance and layout efficiency. Patent Document 1 discloses a connecting block having two sets of concave portions, one set of concave portions formed by parallelly separating two concave portions, and another set of concave portions having a different separation width from the one set of concave portions. In this connecting block, by fitting the legs of a chair into any of the two sets of concave portions, chairs arranged in the left - right direction can be arranged with two different connecting widths.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in recent years, in crowded places where a large number of people gather, such as the venue of a lecture or the like, in order to prevent the spread of highly infectious viruses and the like due to droplet infection and contact infection from person to person, it is required that people sit with a certain distance between them.

[0005] One aspect of the present disclosure aims to provide a new connecting device capable of easily connecting two chairs while maintaining a predetermined interval.

Means for Solving the Problems

[0006] One aspect of the present disclosure is a connecting device for connecting two chairs placed side by side with a gap between them, comprising at least two connecting parts and a spacing-maintaining part. The at least two connecting parts are each connected to different chairs of the two chairs. The spacing-maintaining part connects the at least two connecting parts while maintaining a predetermined gap.

[0007] With this configuration, a predetermined distance is maintained between at least two connecting parts by the spacing-maintaining part, allowing two chairs to be easily connected while maintaining the predetermined distance.

[0008] In one aspect of the present disclosure, the spacing member may have an elongated portion having a length in the longitudinal direction of a predetermined interval. At least the main portion of the elongated portion may extend along the floor surface on which the two chairs are placed.

[0009] With this configuration, the long section increases the distance between the two chairs, and because the main part of the long section extends along the floor, the space between the two chairs is less likely to be obstructed. This makes it possible to connect the two chairs in a way that does not obstruct the space between them.

[0010] In one aspect of the present disclosure, at least two connecting portions may have a connecting portion, a grounding portion, and an engaging portion. The connecting portion is connected to the spacing portion. The grounding portion is in contact with the floor surface on which the two chairs are placed. The engaging portion has a mechanism that enables connection with the two chairs.

[0011] In this configuration, when the connecting device is installed on the floor, the ground contact portion is in contact with the floor, and the spacing portion is connected to the connecting portion. Since the spacing portion is supported by at least two connecting portions, at least two connecting portions can function as the leg ends of the connecting device. This makes it possible to stably install the connecting device on the floor.

[0012] In one aspect of this disclosure, at least two connecting parts may have grooves into which predetermined elements provided on two chairs can be inserted. With such a configuration, the connecting devices can be easily connected by inserting predetermined elements of the chairs into the grooves of at least two connecting parts.

[0013] In one aspect of this disclosure, the connecting device may further include a shelf supported by a spacing member. With such a configuration, it is possible to place luggage or other items on the shelf. In one aspect of this disclosure, the shelf may be configured to allow luggage to be placed above the spacing-retaining section. With such a configuration, the shelf is configured to have a gap between it and the floor at least equal to the height of the spacing-retaining section, making it possible to place luggage on the shelf without it directly touching the floor.

[0014] In one aspect of the present disclosure, the spacing member may be an annular member having a rectangular annular shape. With such a configuration, the strength with which the spacing between two chairs is maintained can be increased compared to a configuration in which at least two connecting members are connected, for example, by a single straight pipe.

[0015] In one aspect of the present disclosure, the annular member may have two first columnar members and two second columnar members. The two first columnar members extend parallel to each other along the floor surface in a direction perpendicular to the longitudinal direction at a predetermined interval between two chairs. The two second columnar members extend parallel to each other along the longitudinal direction at a predetermined interval between two chairs and connect the two side ends of the two first columnar members, respectively. The two second columnar members may bend downward at both ends in the longitudinal direction at a predetermined interval relative to the floor surface. The connecting device may further include a shelf supported by the two second columnar members and provided to have a gap between itself and the floor surface.

[0016] With this configuration, it is possible to connect two chairs while maintaining a predetermined distance, and to place luggage or other items on the shelf without them directly touching the floor, thus making effective use of the space between the two chairs.

[0017] In one aspect of this disclosure, the device may further include fastening members for fastening at least two connecting portions and spacing portions. With such a configuration, for example, even when at least two connecting portions and spacing portions are made of different materials and are independent components used to exhibit specific performance, it is possible to configure the connecting device by fixing at least two connecting portions and spacing portions with fastening members.

[0018] One aspect of the present disclosure is a chair set comprising at least two chairs and at least one connecting device. The at least one connecting device has at least two connecting parts and a spacing part. The at least two connecting parts are connected to different chairs from the at least two chairs. The spacing part connects the at least two connecting parts while maintaining a predetermined distance. The at least two chairs have leg ends having a mechanism that enables the connection of at least two chairs to each other. The at least one connecting device uses leg ends as at least two connecting parts.

[0019] With this configuration, the connecting device can be connected to the chair using the same leg ends as the chair's legs. By using the same existing leg ends as the chair's legs in this way, the manufacturing cost of the connecting device can be reduced.

[0020] One aspect of the present disclosure is a chair set comprising at least two chairs and at least one connecting device. The at least one connecting device has at least two connecting parts and a spacing part. The at least two connecting parts are connected to different chairs from the at least two chairs, respectively. The spacing part connects the at least two connecting parts while maintaining a predetermined distance. The at least two connecting parts have grooves into which the legs of at least two chairs can be inserted. The at least one connecting device is detachably attached to the underside of the seat of one of the at least two chairs.

[0021] According to such a configuration, at least one connecting device can connect at least two chairs with a gap therebetween, or can be stored below the seat pair of one chair when not used for connecting at least two chairs.

[0022] One aspect of the present disclosure is a chair set including at least two chairs and at least one connecting device. The at least one connecting device has at least two connecting parts and a spacing holding part. The at least two connecting parts are respectively connected to different chairs among the at least two chairs. The spacing holding part connects the at least two connecting parts while maintaining a predetermined spacing. The at least two chairs each have a rod-shaped member that extends back and forth along the floor surface on which the at least two chairs are arranged and is provided on each of the left and right legs provided on the at least two chairs. Each rod-shaped member has two leg ends that are attached with a gap therebetween. The at least two connecting parts have grooves into which the rod-shaped member can be inserted, can be arranged between the two leg ends, and are configured to restrict the movement in the front-rear direction by abutting against the two leg ends when arranged between the two leg ends.

[0023] According to such a configuration, since the range of movement in the front-rear direction of the connecting part between the two leg ends is restricted, it is possible to restrict the range of movement in the front-rear direction of at least one connecting device with respect to at least two chairs. Thereby, the displacement between at least two chairs connected by at least one connecting device can be suppressed so as to fall within a predetermined range.

Brief Description of the Drawings

[0024] [Figure 1] It is a perspective view showing the chair set of the first embodiment. [Figure 2] It is a plan view showing the connecting device of the first embodiment. [Figure 3] It is a bottom view showing the connecting device of the first embodiment. [Figure 4] It is a front view showing the connecting device of the first embodiment. [Figure 5]This is a left side view showing the connecting device of the first embodiment. [Figure 6] Figure 6A is a plan view showing the convex connecting portion, Figure 6B is a left side view showing the convex connecting portion, Figure 6C is a rear view showing the convex connecting portion, and Figure 6D is a bottom view showing the convex connecting portion. [Figure 7] Figure 7A is a plan view showing the concave joint, Figure 7B is a right side view showing the concave joint, Figure 7C is a front view showing the concave joint, and Figure 7D is a bottom view showing the concave joint. [Figure 8] This is an enlarged front view showing the connection point between the chair and the connecting device. [Figure 9] This is a perspective view showing a chair set according to the second embodiment. [Figure 10] This is a plan view showing a connecting device having a shelf section according to the second embodiment. [Figure 11] This is a bottom view showing a connecting device having a shelf section according to the second embodiment. [Figure 12] This is a front view showing a connecting device having a shelf section according to the second embodiment. [Figure 13] This is a left side view showing a connecting device having a shelf section according to the second embodiment. [Figure 14] This is a perspective view showing a chair set equipped with a connecting device having a spacing-holding section that holds a convex connecting section and a concave connecting section at different intervals. [Figure 15] This is a perspective view showing a chair set equipped with a connecting device that includes a spacing-holding section that holds a convex connecting section and a concave connecting section at different intervals, and shelf sections of different lengths. [Figure 16] This is a perspective view showing a configuration in which multiple chairs are connected by multiple connecting devices. [Figure 17] This is a schematic perspective view showing a connecting device in which two connecting parts, each having a groove for inserting chair legs, are connected by a rod-shaped member. [Figure 18] This is a schematic perspective view showing a connecting device in which two connecting parts, each having a groove for inserting chair legs, are connected by a plate-like member. [Figure 19] This is a schematic front view showing multiple different mounting positions for the connecting device to two chairs. [Figure 20] Figure 20A is a perspective view showing a modified example of the first embodiment in which the connecting device has a shelf section, and Figure 20B is a left side view showing a modified example of the first embodiment in which the connecting device has a shelf section. [Figure 21] Figure 20 is a perspective view showing multiple connected devices stacked on top of each other. [Figure 22] Figure 22A is a perspective view showing a connecting device with a shelf attached to the underside of the seat of a chair, and Figure 22B is a cross-sectional view of Figure 22A from XXIIB-XXIIB. [Figure 23] Figure 23A is a schematic perspective view showing a configuration in which the range of movement of a connecting device relative to a chair in the front-to-back direction is limited by the ends of the chair legs, and Figure 23B is a cross-sectional view of Figure 23A along the line XXIIIB-XXIIIB. [Figure 24] Figure 24A is a plan view showing two chairs connected by two connected connecting devices, and Figure 24B is a front view showing two chairs connected by two connected connecting devices. [Figure 25] This is a schematic perspective view showing a connecting device in which four connecting parts, each having a groove for inserting chair legs, are connected by multiple rod-shaped members. [Figure 26] Figure 25 is a perspective view showing a chair set equipped with the connecting device shown. [Figure 27] Figure 25 is a perspective view showing the connecting device attached to the underside of the seat of one chair. [Modes for carrying out the invention]

[0025] Hereinafter, exemplary embodiments of the present disclosure will be described with reference to the drawings. [1. First Embodiment] [1-1. Overall Structure] The chair set 1 shown in Figure 1 comprises two chairs 2 and a connecting device 3.

[0026] The connecting device 3 is positioned between two chairs 2 placed side by side and connects the two chairs 2 with a gap between them. When connected to the two chairs 2, the connecting device 3 has the function of fixing the two chairs 2 while maintaining a certain distance between them. In this embodiment, when the width of the chairs 2 is approximately 0.5m, the two chairs 2 are connected by the connecting device 3 at a certain distance, such that the center-to-center distance between the two chairs 2, that is, the distance between the center points of the two chairs 2 in the lateral direction, is approximately 1m. In the following description, the vertical, front-to-back, and left-to-right directions (hereinafter also referred to as the length direction of the predetermined interval) are expressed with reference to a user who is normally seated in the chair 2.

[0027] [1-2. Chairs] Chair 2 comprises a right leg body 10, a left leg body 20, two first leg ends 30, two second leg ends 40, a seat 50, and a backrest 60.

[0028] The right leg 10 and the left leg 20 are formed by bending and welding tubular metal pipes and serve as supports for the seat 50 and backrest 60. The right leg 10 is positioned on the lower right side of the seat 50 and has a right front column 11, a right rear column 12, and a right lower column 13. The right front column 11 is located at the front of the right leg 10 and has length in the vertical direction. The right rear column 12 is located at the rear of the right leg 10 and has length in the vertical direction. The right lower column 13 is located at the bottom of the right leg 10, connects the lower end of the right front column 11 and the lower end of the right rear column 12, and is positioned along the floor surface on which the chair 2 is placed.

[0029] The left leg body 20 is positioned lower and to the left of the seat body 50 and has a left front column 21, a left rear column 22, and a left lower column 23. The left front column 21 is located at the front of the left leg body 20 and has length in the vertical direction. The left rear column 22 is located at the rear of the left leg body 20 and has length in the vertical direction. The left lower column 23 is located at the bottom of the left leg body 20, connecting the lower end of the left front column 21 and the lower end of the left rear column 22, and is positioned along the floor surface on which the chair 2 is placed.

[0030] The first leg end 30 and the second leg end 40 are leg ends that are attached to the right leg body 10 and the left leg body 20 of the chair 2, respectively. The two first leg ends 30 are fixed to the front and rear sides of the right lower column 13 facing the floor surface by fastening members such as screws, one each. The two second leg ends 40 are fixed to the front and rear sides of the left lower column 23 facing the floor surface by fastening members such as screws, one each. The first leg end 30 has the same configuration as the concave connecting part 33 of the connecting device 3 described later, and the second leg end 40 has the same configuration as the convex connecting part 32 of the connecting device 3 described later. A detailed explanation of the configuration of the first leg end 30 and the second leg end 40 is omitted as it is the same as the concave connecting part 33 and the convex connecting part 32 described later, but the first leg end 30 and the second leg end 40 each have a mechanism that enables the connection of two chairs 2 to each other. Therefore, even without a connecting device 3, the two chairs 2 can be connected by the first leg end 30 and the second leg end 40 of the different chairs 2.

[0031] The seat 50 is roughly rectangular and is configured to allow a user to sit on it. The backrest 60 is roughly rectangular and is configured to support the back of the seated user. [1-3. Connecting equipment] As shown in Figures 2 to 5, the connecting device 3 comprises a spacing-holding portion 31, two convex connecting portions 32, two concave connecting portions 33, and four fastening members 36.

[0032] The spacing-holding portion 31 is an annular member having a rectangular annular shape. In this embodiment, the spacing-holding portion 31 is an annular pipe formed into a rectangular shape by bending and welding a tubular metal pipe. The spacing-holding portion 31 is formed into an annular shape by, for example, welding two pipes bent into a U shape at their respective ends. Alternatively, the spacing-holding portion 31 may be formed into an annular shape by bending a single pipe and welding both ends, or it may be formed by extrusion molding. The spacing-holding portion 31 connects two convex connecting portions 32 and two concave connecting portions 33 while maintaining a predetermined interval. The predetermined interval is the distance between the convex connecting portions 32 and the concave connecting portions 33. In this embodiment, the spacing-holding portion 31 connects the convex connecting portions 32 and the concave connecting portions 33 at an interval of approximately 0.5 m.

[0033] The spacing section 31 has two first pipes 311 and two second pipes 312. The two first pipes 311 have length in the direction perpendicular to the length direction of the predetermined spacing, i.e., in the front-to-back direction, when the connecting device 3 is placed on the floor, and extend straight parallel to each other along the floor. The two second pipes 312 have length in the length direction of the predetermined spacing, i.e., in the left-to-right direction, when the connecting device 3 is placed on the floor, and extend straight parallel to each other along the floor. The two second pipes 312 connect the two side ends of the two first pipes 311, respectively.

[0034] The convex connecting portion 32 and the concave connecting portion 33 function as the leg ends of the connecting device 3 when the connecting device 3 is positioned on the floor so that the two first pipes 311 and the two second pipes 312 are all aligned with the floor surface. The two convex connecting portions 32 are fastened one by one to the front and rear sides of the side of the left-side first pipe 311 facing the floor surface by fastening members 36. For example, screws, rivets, etc., are used as fastening members 36. In this way, the two convex connecting portions 32 are fixed to the left-side first pipe 311. The two concave connecting portions 33 are fastened one by one to the front and rear sides of the side of the right-side first pipe 311 facing the floor surface by fastening members 36. In this way, the two concave connecting portions 33 are fixed to the right-side first pipe 311. As a result, the direction in which the convex connecting portions 32 and the concave connecting portions 33 are aligned is the length direction of the predetermined interval, i.e., the left-right direction.

[0035] As shown in Figures 6A-6D, the convex connecting portion 32 has a convex main body portion 321 and a convex engaging portion 322. The convex main body portion 321 is a member that extends elongated in one direction. In the following description, one direction is the longitudinal direction of the convex main body portion 321, and the direction perpendicular to the one direction is the short direction of the convex main body portion 321. The convex main body portion 321 has a convex fixing portion 323, a convex grounding portion 324, and a convex through hole 325.

[0036] The convex fixing portion 323 is the portion to which the spacing portion 31, specifically the first pipe 311 located on the left side, is fixed. The convex fixing portion 323 is provided on the upper surface of the convex main body portion 321 in order to support the first pipe 311 located on the left side from below, and has a shape that is curved in the short direction so that a tubular pipe can be fixed along the longitudinal direction.

[0037] The convex grounding portion 324 is the part that contacts the floor surface on which the connecting device 3 is installed. The convex grounding portion 324 is provided on the lower surface of the convex main body portion 321 and has a flat shape to ensure stable contact with the floor surface. The convex grounding portion 324 is located at least on the opposite side of the convex fixing portion 323 on the convex main body portion 321.

[0038] The convex through-hole 325 is provided in the center of the convex main body portion 321 so as to pass through the convex fixing portion 323 and the convex grounding portion 324, in order to allow the fastening member 36 used for fixing to the first pipe 311 located on the left side to which the convex connecting portion 32 is attached.

[0039] The convex engaging portion 322 has a mechanism that enables connection with the first leg end 30 of the chair 2. Specifically, the convex engaging portion 322 has an extension portion 326, a notch portion 327, and two engaging pieces 328.

[0040] The extension portion 326 extends from the convex main body portion 321 in the shorter direction. In other words, in the mounted state in which the convex connecting portion 32 is attached to the spacing holding portion 31, the extension portion 326 extends to the left from the convex main body portion 321.

[0041] The notch 327 is provided at the end of the extension 326 opposite to the end on the convex side of the main body 321 in the short direction. In other words, the notch 327 is provided at the left end of the extension 326 when installed.

[0042] The two engaging pieces 328 each protrude from the tip of the extension 326, which is divided into two by the notch 327, on the side opposite to the notch 327. In other words, in the installed state, the two engaging pieces 328 protrude from the tip of the extension 326, which is divided into two by the notch 327, in directions away from each other along the longitudinal direction, i.e., forward and backward, respectively. As described above, the second leg end 40 of the chair 2 has the same configuration as the convex connecting portion 32.

[0043] As shown in Figures 7A-7D, the concave connecting portion 33 has a concave main body portion 331 and a concave engaging portion 332. The concave main body portion 331 is a member that extends longer in one direction. In the following description, one direction is the longitudinal direction of the concave main body portion 331, and the direction perpendicular to the one direction is the short direction of the concave main body portion 331. The concave main body portion 331 has a concave fixing portion 333, a concave grounding portion 334, and a concave through hole 335.

[0044] The recessed fixing portion 333 is the portion to which the spacing portion 31, specifically the first pipe 311 located on the right side, is fixed. The recessed fixing portion 333 is provided on the upper surface of the recessed main body portion 331 in order to support the first pipe 311 located on the right side from below, and has a shape that is curved in the short direction so that a tubular pipe can be fixed along the longitudinal direction.

[0045] The recessed grounding portion 334 is the part that contacts the floor surface on which the connecting device 3 is installed. The recessed grounding portion 334 is provided on the lower surface of the recessed main body portion 331 and has a flat shape to ensure stable contact with the floor surface. The recessed grounding portion 334 is located at least on the opposite side of the recessed fixing portion 333 of the recessed main body portion 331.

[0046] The recessed through-hole 335 is provided in the center of the recessed main body portion 331 so as to pass through the recessed fixing portion 333 and the recessed grounding portion 334, in order to allow the fastening member 36 used for fixing to the first pipe 311 located on the right side to which the recessed connecting portion 33 is attached.

[0047] The recessed engaging portion 332 has a mechanism that allows connection to the second leg end 40 of a chair 2 that is different from the chair 2 having the first leg end 30 that connects to the convex connecting portion 32. Specifically, the recessed engaging portion 332 has a fitting projection 336, two fitting wall portions 337, and two spaces 338.

[0048] The fitting projection 336 protrudes from near the center in the longitudinal direction of the recessed main body portion 331 in the short direction. In other words, in the mounting state in which the recessed connecting portion 33 is attached to the spacing holding portion 31, the fitting projection 336 protrudes to the right from near the center in the front-rear direction of the recessed main body portion 331.

[0049] The two fitting wall portions 337 extend in the short direction from both longitudinal ends of the concave main body portion 331, flanking the fitting projection 336, so as to form two spaces 338. The tips of the two fitting wall portions 337 are each bent inward toward the fitting projection 336. In other words, the two fitting wall portions 337 extend to the right from both front-rear ends of the concave main body portion 331, so that in the installed state, there are two spaces 338 between the two fitting wall portions 337 and the fitting projection 336. The tips of the two fitting wall portions 337 are bent toward directions toward each other along the longitudinal direction, i.e., toward the front and rear, respectively. As described above, the first leg end 30 of the chair 2 has the same configuration as the concave connecting portion 33.

[0050] As shown in Figure 8, the convex connecting portion 32 of the connecting device 3 connects to the first leg end 30 of the chair 2. Specifically, the convex connecting portion 32 and the first leg end 30 are connected by overlapping the portion of the convex connecting portion 32 that protrudes from the lateral region of the connecting device 3 and the portion of the first leg end 30 that protrudes from the lateral region of the chair 2. In other words, the convex connecting portion 32 and the first leg end 30 are connected by overlapping the convex engaging portion 322 and the concave engaging portion 332, and by relatively displacing the convex connecting portion 32 toward the first leg end 30, or the first leg end 30 toward the convex connecting portion 32. The concave connecting portion 33 of the connecting device 3 also connects to the second leg end 40 of the chair 2 in the same way as the convex connecting portion 32. This allows the connecting device 3 to be attached from above or below two chairs 2 placed side by side with a gap between them.

[0051] [1-4. Effects] According to the first embodiment described in detail above, the following effects can be obtained. (1a) In this embodiment, two chairs 2 are connected with a gap between them by a connecting device 3 which comprises two convex connecting parts 32, two concave connecting parts 33, four fastening members 36, and a spacing-holding part 31 which is a rectangularly formed annular pipe. As a result, a predetermined gap is maintained between the convex connecting parts 32 and the concave connecting parts 33 by the spacing-holding part 31. Therefore, the two chairs 2 can be easily connected while maintaining a predetermined gap. Furthermore, because the spacing-holding part 31 is an annular pipe, the strength of maintaining the gap between the two chairs 2 can be increased compared to, for example, a configuration in which one convex connecting part 32 and one concave connecting part 33 are connected by a single tubular pipe.

[0052] (1b) In this embodiment, the distance between the two chairs 2 is increased by two second pipes 312 that extend along the floor surface. As a result, the space between the two chairs 2 is less likely to be obstructed, and for example, when a person passes between two chairs 2 connected at a predetermined distance apart, the connecting device 3 is less likely to get in the way. Thus, it is possible to connect the two chairs 2 with the connecting device 3 in a configuration that is less likely to get in the way of the space between the two chairs 2.

[0053] (1c) In this embodiment, the convex connecting portion 32 and the concave connecting portion 33 also function as the leg ends of the connecting device 3. This makes it possible to stably install the connecting device 3 on the floor. In addition, in this embodiment, the convex connecting portion 32 and the concave connecting portion 33 of the connecting device 3 have the same configuration as the first leg end 30 and the second leg end 40 of the chair 2. In other words, the connecting device 3 can be connected to the chair 2 using the same leg ends that have a configuration that allows two chairs 2 to be connected to each other. In this way, by using the same existing leg ends as the chair 2, it is possible to reduce the manufacturing cost of the connecting device 3.

[0054] (1d) In this embodiment, two convex connecting parts 32, two concave connecting parts 33, and a spacing part 31 are fixed together by four fastening members 36. Therefore, in order to achieve the unique performance of maintaining strength while keeping a certain distance apart to suppress droplet infection, for example, the connecting device 3 can be constructed by fixing together independent members made of different materials, such as resin convex connecting parts 32 and concave connecting parts 33 and metal spacing part 31, using the fastening members 36.

[0055] Furthermore, the convex connecting portion 32 and the concave connecting portion 33 correspond to at least two connecting portions, the two first pipes 311 correspond to two first columnar members, and the two second pipes 312 correspond to the elongated portion and two second columnar members. In addition, the convex fixing portion 323 and the concave fixing portion 333 correspond to connection portions, the convex grounding portion 324 and the concave grounding portion 334 correspond to grounding portions, and the convex engaging portion 322 and the concave engaging portion 332 correspond to engaging portions.

[0056] [2. Second Embodiment] [2-1. Overall Structure] As shown in Figure 9, in the second embodiment, the shape of the spacing-holding portion 31a of the connecting device 3a provided by the chair set 1a differs from the spacing-holding portion 31 of the connecting device 3 provided by the chair set 1 in the first embodiment. Since the basic configuration of the chair set 1a is the same as in the first embodiment, the same reference numerals are used for components common to the first embodiment, and their descriptions are omitted. The description will focus on the components that differ from the first embodiment.

[0057] [2-2. Connecting equipment] As shown in Figures 10 to 13, the connecting device 3a comprises a spacing holding section 31a, two convex connecting sections 32, two concave connecting sections 33, four fastening members 36, and a shelf section 34.

[0058] The spacing-holding section 31a is an annular pipe formed in a rectangular shape when viewed from the top and bottom by bending and welding a tubular metal pipe. The spacing-holding section 31a connects the two convex connecting sections 32 and the two concave connecting sections 33 while maintaining a predetermined interval. In this embodiment as well, the convex connecting sections 32 and the concave connecting sections 33 are connected by the spacing-holding section 31 at an interval of approximately 0.5 m.

[0059] The spacing section 31a has two first pipes 311a and two second pipes 312a. The two first pipes 311a have length in the spacing section 31a perpendicular to the length direction of the predetermined interval, i.e., in the front-to-back direction, when the connecting device 3a is placed on the floor, and extend straight parallel to each other along the floor. The two second pipes 312a have length in the length direction of the predetermined interval, i.e., in the left-to-right direction, when the connecting device 3a is placed on the floor. The two second pipes 312a are bent such that both ends in the length direction of the predetermined interval, i.e., in the left-to-right direction, are inclined downward with respect to the floor. The two second pipes 312a connect the two side ends of the two first pipes 311a, respectively. When the connecting device 3a is placed on the floor such that the two first pipes 311a are arranged along the floor, the two second pipes 312a have a gap between them and the floor.

[0060] The two convex connecting portions 32 are fastened one by one to the front and rear sides of the side of the first pipe 311a on the left that faces the floor, using fastening members 36, and are fixed to the first pipe 311a on the left. The two concave connecting portions 33 are fastened one by one to the front and rear sides of the side of the first pipe 311a on the right that faces the floor, using fastening members 36, and are fixed to the first pipe 311a on the right.

[0061] The shelf section 34 is formed in a grid pattern by combining four rectangular, annular metal members. Specifically, the shelf section 34 is formed in a grid pattern by overlapping two annular members that are oriented vertically on top of two annular members that are arranged parallel to each other, and joining them by welding or the like. The shelf section 34 is supported by two second pipes 312a and is provided with a gap between it and the floor surface. More precisely, the shelf section 34 is provided inside the spacing-holding section 31a so as to span across the two second pipes 312a.

[0062] [2-3. Effects] According to the second embodiment described in detail above, the following effects can be obtained. (2a) In this embodiment, two chairs 2 are connected with a gap between them by a connecting device 3a comprising two convex connecting parts 32, two concave connecting parts 33, four fastening members 36, and a spacing-holding part 31a which is a rectangularly formed annular pipe. As a result, a predetermined gap is maintained between the convex connecting parts 32 and the concave connecting parts 33 by the spacing-holding part 31a. Therefore, similar to the connecting device 3 of the first embodiment, two chairs 2 can be easily connected while maintaining a predetermined gap.

[0063] (2b) In this embodiment, the convex connecting portion 32 and the concave connecting portion 33 also function as the leg ends of the connecting device 3a. This makes it possible to stably install the connecting device 3a on the floor surface, similar to the connecting device 3 in the first embodiment. In this embodiment as well, the convex connecting portion 32 and the concave connecting portion 33 of the connecting device 3a have the same configuration as the first leg end 30 and the second leg end 40 of the chair 2. Therefore, similar to the connecting device 3 in the first embodiment, it is possible to reduce the manufacturing cost of the connecting device 3a by using the same existing leg ends as the chair 2.

[0064] (2c) In this embodiment, the shelf section 34 is provided inside the spacing section 31a so that it is supported by two second pipes 312a with a gap between it and the floor surface. Therefore, the connecting device 3a can connect two chairs 2 while maintaining a predetermined distance, and make effective use of the space between the two chairs 2 to provide a storage area where luggage and other items can be placed without directly touching the floor surface.

[0065] The two first pipes 311a correspond to two first columnar members, and the two second pipes 312a correspond to the elongated section and two second columnar members. [3. Other Embodiments] While embodiments of this disclosure have been described above, it goes without saying that this disclosure is not limited to the embodiments described above and can take various forms.

[0066] (3a) In the second embodiment described above, a shelf section 34 formed in a grid shape was illustrated, but the shape of the shelf section is not limited thereto. For example, the shelf section may be a plate-shaped member supported by two second pipes 312a, or a tray-shaped member supported by two second pipes 312a. The shelf section may also be made of various materials, such as resin.

[0067] (3b) In each of the above embodiments, connecting devices 3 and 3a were provided to connect two chairs 2 at an interval of approximately 1 m between the central axes of the two chairs 2. However, the interval created between the two chairs 2 by the connecting device is not limited to this. For example, the distance between the convex connecting portion 32 and the concave connecting portion 33 of the connecting device may be any distance greater than a certain distance sufficient to suppress droplet infection, for example.

[0068] For example, as shown in chair set 1b in Figure 14 and chair set 1c in Figure 15, when the width of the chair 2 is approximately 0.5m, the connecting devices 3b and 3c may be capable of connecting two chairs 2 at an interval of approximately 1.5m between the central axes of the two chairs 2. In this case, the connecting devices 3b and 3c are connected by spacing-holding parts 31b and 31c at a predetermined interval of approximately 1m between the convex connecting part 32 and the concave connecting part 33. Inside the spacing-holding part 31c, a shelf part 34c is provided that is long in the longitudinal direction of the predetermined interval, as in the shelf part 34 of the second embodiment described above.

[0069] (3c) In each of the above embodiments, chair sets 1, 1a to 1c comprising two chairs 2 and one connecting device 3, 3a to 3c have been illustrated, but for example, a chair set may comprise multiple chairs 2 and multiple connecting devices. Figure 16 illustrates a chair set in which three chairs 2 are connected by two connecting devices 3c. This makes it possible to fix and arrange multiple chairs 2 at a distance of a certain amount or more that suppresses droplet infection, for example, in a venue such as a lecture hall, while considering appearance and arrangement efficiency.

[0070] (3d) In each of the above embodiments, a convex connecting portion 32 and a concave connecting portion 33 having the same configuration as the first leg end 30 and the second leg end 40 of the chair 2 have been illustrated, but the configuration of the connecting portion in the connecting device is not limited thereto. For example, the connecting portion may have a groove into which a predetermined element provided on the chair can be inserted. The chair is connected to the connecting portion having the groove by fitting the predetermined element of the chair into the groove. The predetermined element includes various components such as columnar members that make up the chair, and other members such as leg ends, seats, and backrests. Columnar members of the chair include, for example, the chair legs and areas other than the chair legs where columnar parts are formed. The chair legs include a support that supports the seat 50 and backrest 60 between the seat 50 and the floor surface on which the chair is placed. The chair legs include not only the right leg 10 and the left leg 20, but also, for example, a connecting rod that connects a part of the right leg 10 and a part of the left leg 20.

[0071] Furthermore, while the above embodiments illustrate the spacing sections 31, 31a to 31d as rectangular annular pipes, the configuration of the spacing sections is not limited to these. For example, the spacing section may be at least one pipe or a plate-shaped member. Also, while the first embodiment illustrates a configuration in which two second pipes 312 extend straight along the floor surface, the two second pipes may have a shape in which the main part extends along the floor surface, but the other parts may not be along the floor surface.

[0072] For example, as shown in Figure 17, the connecting device 3d may include two connecting parts 35 and a spacing part 31d. The two connecting parts 35 have grooves 351 into which the legs of the chairs 2, for example, the lower left column 23 of the first chair 2 and the lower right column 13 of the second chair 2, can be inserted. The connecting parts 35 are formed in a rectangular parallelepiped shape, with one side along the longitudinal direction being open to form the grooves 351. The spacing part 31d is a single pipe that connects the two connecting parts 35 while maintaining a predetermined distance between them.

[0073] Furthermore, as shown in Figure 18, for example, the connecting device 3e may include two connecting parts 35 and a spacing-holding part 31e. The spacing-holding part 31d is a plate-shaped member that connects the two connecting parts 35 while maintaining a predetermined distance between them.

[0074] In the connecting devices 3d and 3e having a connecting portion 35, even chairs that do not have a special configuration for connecting with the connecting devices 3d and 3e can be easily connected by using the chair's legs and inserting the chair legs into the grooves 351 of the connecting portion 35. As shown in Figure 19, the connecting devices 3d and 3e having a connecting portion 35 can be attached to various locations on the chair 2a. The connecting portion 35 may be connected to the legs of the chair 2a, such as the right front column 11 and the left front column 21, the right rear column 12 and the left rear column 22, etc. Furthermore, the connecting portion 35 may be connected to other locations other than the legs of the chair 2a, for example, if the backrest 60 has a columnar member that extends in a columnar shape and the columnar member can be inserted into the grooves 351, the connecting portion 35 may be connected to the backrest 60.

[0075] If the two connecting parts 35 are connected by the spacing-holding parts 31d and 31e with their respective grooves 351 facing the same direction, the connecting devices 3d and 3e can be attached to the chair 2a from various directions, such as the front, rear, top, and bottom. Alternatively, the grooves 351 of the two connecting parts 35 may be connected by the spacing-holding parts 31d and 31e with their respective grooves 351 facing different directions.

[0076] Furthermore, multiple connecting devices 3d and 3e may be connected to the two chairs 2a. This makes it possible to more firmly fix the two chairs 2a while maintaining a predetermined distance between them. (3e) The spacing portion and connecting portion may be made of various materials depending on the performance to be achieved. The spacing portion and connecting portion may be made of, for example, a resin material. In the above embodiments, a configuration in which a pipe with an annular shape is used as the spacing portion was illustrated. However, the spacing portion may be made of other components such as a rod-shaped member or a linear member. The spacing portion may also have an annular shape or other shapes.

[0077] (3f) In the first embodiment described above, a configuration in which the connecting device 3 does not have a shelf section was illustrated, and in the second embodiment described above, a configuration in which the connecting device 3a has a shelf section 34 was illustrated. However, the configurations in which the connecting device has a shelf section or does not have a shelf section are not limited thereto. Various forms of spacing-holding sections can support various forms of shelf sections. For example, the spacing-holding sections 31, 31a to 31e described above and the shelf sections 34, 34c may be freely combined. Alternatively, the connecting device 3 of the first embodiment may have a shelf section. For example, as shown in Figure 20, the connecting device 3f may include a spacing-holding section 31, two convex connecting sections 32, two concave connecting sections 33, four fastening members 36, and a shelf section 34f.

[0078] The shelf section 34f consists of two annular pipes formed into a rectangular shape by bending and welding tubular metal pipes. The shelf section 34f is formed such that the longitudinal length of the two annular pipes is slightly shorter than the distance between the two first pipes 311. The shelf section 34f is supported by the two first pipes 311 and is provided with a gap between it and the floor surface equal to the vertical thickness of the spacing section 31. Specifically, the shelf section 34f is provided so that the two annular pipes, which are spaced apart and parallel to each other, overlap the two first pipes 311 and are placed on top of the spacing section 31. In this configuration, luggage and other items can be placed above the spacing section 31 by the shelf section 34f, making it possible to place luggage and other items without them directly touching the floor surface. The shelf section 34f may be formed from one or more annular pipes. The shelf section 34f may also be configured to be supported by two second pipes 312.

[0079] As shown in Figure 21, multiple connecting devices 3f can be stacked. With a configuration like that of connecting device 3f, a portion of the shelf portion 34f of another connecting device 3f located below fits inside the spacing portion 31 of one connecting device 3f stacked on top, making it difficult for two stacked connecting devices 3f to shift in the left-right direction. Therefore, when stacking multiple connecting devices 3f, a stacking method that prevents shifting is possible.

[0080] Furthermore, as shown in Figure 22, for example, the connecting device 3g may be configured to include a spacing-holding section 31, four connecting sections 35, and a shelf section 34f. The spacing-holding section 31 connects the four connecting sections 35 while maintaining a predetermined distance. The four connecting sections 35 may be fixed to the spacing-holding section 31 by various methods such as welding or using fastening members. The four connecting sections 35 are provided below the two first pipes 311 of the spacing-holding section 31, with grooves 351 opening downwards. The four connecting sections 35 are fixed two to the front and two to the rear of the two first pipes 311, spaced apart from each other, so that the longitudinal direction of the four connecting sections 35 aligns with the longitudinal direction of the two first pipes 311. The four connecting sections 35 are fixed to the two first pipes 311, two at a time, with a spacing that is approximately equal to, or shorter than, the spacing between the two first leg ends 30 and the spacing between the two second leg ends 40. The spacing between the two connecting sections 35 arranged front to back on each of the two first pipes 311 may be such that the distance between the front end of the front connecting section 35 and the rear end of the rear connecting section 35 is approximately equal to, or shorter than, the distance between the rear end of the front first leg end 30 and the front end of the rear first leg end 30. Similarly, the spacing between the two connecting sections 35 arranged front to back on each of the two first pipes 311 may be such that the distance between the front end of the front connecting section 35 and the rear end of the rear connecting section 35 is approximately equal to, or shorter than, the distance between the rear end of the front second leg end 40 and the front end of the rear second leg end 40.

[0081] The connecting device 3g can connect two chairs 2. Alternatively, the connecting device 3g may be detachably attached to the underside of the seat 50 of one chair 2. Specifically, the connecting device 3g may be attached to one chair 2 by connecting two connecting parts 35 from above to the right lower column 13 and left lower column 23 of one chair 2. In this case, the predetermined spacing will be the same as the spacing between the right lower column 13 and left lower column 23 of the chair 2. That is, the spacing between the grooves 351 of the connecting parts 35 will be the same as the spacing between the right lower column 13 and left lower column 23 of the chair 2. In other words, the spacing-holding part 31 connects the four connecting parts 35 while maintaining a spacing of approximately the same length as the spacing between the right lower column 13 and left lower column 23 of the chair 2. This allows the connecting device 3g to be installed in a way that allows two chairs 2 to be connected with a gap in between, or to be stored under one of the chairs 2 when not being used to connect two chairs 2, so that luggage or other items can be placed there, making it usable for a variety of purposes.

[0082] (3g) The range of movement of the connecting device in the front-to-back direction relative to the chair may be restricted by at least one leg end of the chair to which the connecting device is attached. For example, the range of movement of the connecting devices 3, 3a to 3c, 3f in the front-to-back direction relative to the chair 2 is restricted by the connection of the convex connecting part 32 and the first leg end 30 of the chair 2, and the concave connecting part 33 and the second leg end 40 of the chair 2. This makes it possible to suppress misalignment between two chairs 2 connected by the connecting devices 3, 3a to 3c, 3f.

[0083] Furthermore, for example, the range of movement of the connecting device in the front-to-back direction relative to the chair may be limited by arranging two connecting parts having grooves between two leg ends attached to the chair legs at a distance from each other. Specifically, as shown in Figure 22, the four connecting parts 35 of the connecting device 3g may be arranged in pairs from above between two second leg ends 40 attached to the lower left column 23 of the chair 2, and between two first leg ends 30 attached to the lower right column 13 of the same chair 2. Alternatively, as shown in Figure 23, the two connecting parts 35h of the connecting device 3h may be arranged from below between two second leg ends 40h attached to the lower left column 23 of the first chair 2, and between two first leg ends 30h attached to the lower right column 13 of the second chair 2. The four connecting parts 35 and the two connecting parts 35h, arranged in this manner, will contact the two first leg ends 30, 30h and the two second leg ends 40, 40h even if they slide along the length of the left lower column 23 and the right lower column 13. Therefore, the range of movement of the four connecting parts 35 and the two connecting parts 35h in the front-to-back direction is limited between the two first leg ends 30, 30h and the two second leg ends 40, 40h of the chair 2. As a result, it is possible to limit the range of movement of the connecting devices 3g, 3h relative to the chair 2 in the front-to-back direction. This makes it possible to suppress misalignment between the two chairs 2 connected by the connecting devices 3g, 3h. Note that the two first leg ends 30h and the two second leg ends 40h may be configured without a mechanism that enables them to connect to each other.

[0084] The two connecting portions 35h are bent into a C-shape so that the long sides of a plate-like member with length are close together, and have a cylindrical shape with an opening 352h. Because the two connecting portions 35h are cylindrical, they have a groove 351h into which the legs of the chair 2 can be inserted through the opening 352g. The two connecting portions 35h have a length that is approximately equal to, or shorter than, the distance between the two first leg ends 30h and the distance between the two second leg ends 40h. The distance from the front end to the rear end of the connecting portion 35h may be approximately equal to, or shorter than, the distance between the rear end of the front first leg end 30h and the front end of the rear first leg end 30h. Similarly, the distance from the front end to the rear end of the connecting portion 35h may be approximately equal to, or shorter than, the distance between the rear end of the front second leg end 40h and the front end of the rear second leg end 40h. The distance between the long sides of the two connecting sections 35h, i.e., the opening width of the opening section 352h, is formed to be shorter than the diameters of the lower left column 23 and the lower right column 13. Therefore, even when the connecting section 35h is attached to the legs of the chair 2 from below, it is possible to make it difficult for the connecting section 35h to detach from the legs of the chair 2.

[0085] (3h) Two or more of the connecting devices 3a to 3c, 3f each have a convex connecting portion 32 and a concave connecting portion 33 that engage with each other, so that they can be connected to one another. For example, as shown in Figure 24, two chairs 2 may be connected by two connecting devices 3f. This makes it possible to easily adjust the distance between two chairs by changing the number of connecting devices used.

[0086] (3i) The spacing portion and the connecting portion are not limited to separate and independent members, and the spacing portion and the connecting portion may be formed integrally.

[0087] (3j) As shown in Figure 25, the connecting device 3i may be configured to include a spacing section 31i and four connecting sections 35i. The spacing section 31i is made up of a combination of multiple pipes, for example, six pipes, and connects the four connecting sections 35i while maintaining a predetermined interval. The spacing section 31i has two first pipes 311i and four second pipes 312i. The two first pipes 311i have a length in the spacing section 31i when the connecting device 3i is placed on the floor, in a direction perpendicular to the length direction of the predetermined interval, i.e., in the front-to-back direction. The length of the first pipes 311i is shorter than the interval between the right front column 11 and the right rear column 12 of the chair 2 or between the left front column 21 and the left rear column 22 of the chair 2. Connecting sections 35i are provided at both ends of the two first pipes 311i. It is more preferable that the length of the first pipe 311i is shorter than the distance between the two first leg ends 30 attached to the right leg body 10 of the chair 2 or the two second leg ends 40 attached to the left leg body 20 of the chair 2, when the two connecting parts 35i are attached to both ends of the first pipe 311i, respectively.

[0088] The connecting portion 35i is a resin molded product formed in the shape of a cap that covers the end of the first pipe 311i. That is, the connecting portion 35i is shaped to fit the end of the first pipe 311i and is fixed by fitting it onto the end of the first pipe 311i. By forming the four connecting portions 35i in the shape of caps in this way, the attachment of the four connecting portions 35i to the spacing portion 31i becomes easier compared to a configuration in which the connecting portions are fixed to the spacing portion using welding or fastening members, thereby improving productivity. The connecting portion 35i has a groove 351i into which the legs of the chair 2 can be inserted. The four connecting portions 35i are attached to both ends of the two first pipes 311i, respectively, such that the grooves 351i provided in the connecting portion 35i open downwards.

[0089] The four second pipes 312i have a length in the longitudinal direction, i.e., the left-right direction, of a predetermined interval in the spacing section 31i when the connecting device 3i is placed on the floor. The length of the four second pipes 312i is approximately the same as the length of the predetermined interval. The four second pipes 312i are connected to two first pipes 311i at a predetermined interval so that they are arranged parallel to each other at approximately the same interval. That is, the four second pipes 312i are placed between two first pipes 311i and are fixed perpendicularly to each of the two first pipes 311i by welding or the like. In the connecting device 3i, the four second pipes 312i, arranged parallel to each other at approximately the same interval, function as a shelf section.

[0090] As shown in Figure 26, the chair set 1i, the connecting device 3i can connect two chairs 2. Specifically, the connecting device 3i is attached between the two chairs 2 by connecting two connecting parts 35i from above to the lower left column 23 of one chair 2 and the lower right column 13 of the other chair 2. As shown in the example in Figure 26, the four connecting parts 35i of the connecting device 3i may be positioned from above between the two second leg ends 40 attached to the lower left column 23 of the first chair 2, and between the two first leg ends 30 attached to the lower right column 13 of the second chair 2. The four connecting parts 35i positioned in this way will contact the two first leg ends 30 and the two second leg ends 40 even when they slide in the longitudinal direction of the lower left column 23 and the lower right column 13. Therefore, the range of movement of the four connecting parts 35i in the front-to-back direction is restricted between the two first leg ends 30 and the two second leg ends 40 of the chair 2. As a result, it is possible to restrict the range of movement of the connecting device 3i in the front-to-back direction relative to the chair 2. This makes it possible to suppress misalignment between the two chairs 2 connected by the connecting device 3i.

[0091] Furthermore, the connecting device 3i may be detachably attached to the underside of the seat 50 of one chair 2, as shown in Figure 27. Specifically, the connecting device 3i may be attached to one chair 2 by connecting two connecting parts 35i from above to the right lower column 13 and left lower column 23 of one chair 2, respectively. In this case, the predetermined interval will be the same as the interval between the right lower column 13 and left lower column 23 of the chair 2. That is, the interval between the grooves 351i of the connecting parts 35i attached to the front or rear side of the two first pipes 311i will be the same as the interval between the right lower column 13 and left lower column 23 of the chair 2. In other words, the interval-holding part 31i connects the two front connecting parts 35i arranged along the length direction of the predetermined interval, maintaining an interval of approximately the same length as the interval between the right lower column 13 and left lower column 23 of the chair 2. Furthermore, the spacing-holding section 31i connects the two rear connecting sections 35i, which are arranged along the length of a predetermined interval, while maintaining a distance of approximately the same length as the distance between the right lower column 13 and the left lower column 23 of the chair 2. This allows the connecting device 3i to be used for various purposes, such as connecting two chairs 2 with a gap between them, or being able to store it under one of the chairs 2 when not being used to connect two chairs 2, allowing for the storage of luggage or other items.

[0092] (3k) The functions of one component in each of the above embodiments may be distributed among multiple components, or the functions of multiple components may be integrated into one component. Also, parts of the configuration of each of the above embodiments may be omitted. Also, at least parts of the configuration of each of the above embodiments may be added to, substituted for, or otherwise replaced with the configuration of other above embodiments. Any aspect of the technical concept specified by the wording of the claims is an embodiment of the present disclosure. [Explanation of symbols]

[0093] 1,1a~1c,1i...Chair set, 2,2a...Chair, 3,3a~3i...Connection equipment, 10...Right leg body, 11...Right front column, 12...Right rear column, 13...Right lower column, 20...Left leg body, 21...Left front column, 22...Left rear column, 23...Left lower column, 30,30h...1st leg end , 31,31a~31e,31i... Spacing holding part, 32... Convex connecting part, 33... Concave connecting part, 34,34c,34f... Shelf part, 35,35h,35i... Connecting part, 36... Fastening member, 40,40h... Second leg end, 50... Seat body, 60... Backrest, 311 ,311a,311i...First pipe, 312,312a,312i...Second pipe, 321...Convex main body, 322...Convex engaging part, 323...Convex fixing part, 324...Convex grounding part, 325...Convex through hole, 326...Extension part, 327...Notch, 328...Engaging piece, 331...Concave main body, 332...Concave engaging part, 333...Concave fixing part, 334...Concave grounding part, 335...Concave through hole, 336...Fitting projection, 337...Fitting wall, 338...Space, 351,351h,351i...Groove, 352h...Opening part.

Claims

1. A connecting device that connects two chairs placed side by side with a gap between them, At least two connecting parts, each connected to a different chair among the two chairs, A spacing-holding section that connects the at least two connecting sections while maintaining a predetermined distance, Equipped with, The two chairs mentioned above each consist of a right leg and a left leg, The at least two connecting portions have grooves into which the right leg and the left leg can be inserted, The predetermined interval is the same as the interval between the right leg and the left leg of one of the two chairs. The spacing member is an annular member having a rectangular ring shape when viewed from a direction perpendicular to the floor surface on which the two chairs are placed. Connecting equipment.

2. A connecting device according to claim 1, The right leg body is located below the right leg body and includes a right lower column positioned along the floor surface, The left leg body is located below the left leg body and includes a left lower column positioned along the floor surface, The groove is into which the lower right column and the lower left column can be inserted. The predetermined interval is the same as the interval between the lower right column and the lower left column in the chair. Connecting equipment.

3. A connecting device according to claim 1 or claim 2, The interval-holding portion has an elongated portion having a length in the longitudinal direction of the predetermined interval, The aforementioned elongated portion is a connecting device, the main part of which extends along the floor surface.

4. A connecting device according to any one of claims 1 to 3, A connecting device further comprising a shelf section supported by the aforementioned spacing-holding section.

5. The connecting device according to claim 4, The shelf section is configured to allow the placement of goods above the spacing-holding section, and is a connecting device.

6. A connecting device according to any one of claims 1 to 5, The aforementioned annular member is Two first columnar members extending parallel to each other along the floor surface in a direction perpendicular to the longitudinal direction of the predetermined interval, It has two second columnar members that extend parallel to each other along the length direction of the predetermined interval and connect the two side ends of the two first columnar members, The two second columnar members are bent downward at both ends in the longitudinal direction at the predetermined interval relative to the floor surface. A connecting device further comprising a shelf section supported by the two second columnar members and provided with a gap between it and the floor surface.

7. A connecting device according to any one of claims 1 to 6, A connecting device further comprising a fastening member for fastening the at least two connecting portions and the spacing portion.

8. A connecting device according to any one of claims 1 to 5, The aforementioned interval-holding part is The system comprises two first columnar members that extend parallel to each other along the floor surface in a direction perpendicular to the longitudinal direction of the predetermined interval, The aforementioned at least two connecting parts comprise four connecting parts, Two of the four connecting parts are attached to one of the two first columnar members. Of the four connecting parts, the other two are attached to the other of the two first columnar members. Connecting equipment.

9. The connecting device according to claim 8, Two of the four connecting parts are attached to both ends of the first columnar member, Of the four connecting parts, the other two are attached to both ends of the other first columnar member, Connecting equipment.

10. At least two chairs, At least one connecting device, A chair set equipped with, The at least one connecting device is a connecting device according to any one of claims 1 to 9. Chair set.

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