JP2021060108A - Joint structure of pipe member - Google Patents

Abstract

To enhance a degree of freedom related to assembly of a pipe member while reasonably securing an insertion size of a claw into a first pipe member when connecting together first and second pipe members which are orthogonal to each other.SOLUTION: A joint structure comprises a strut 15 (first pipe member) which has slits u, u2 in substantially orthogonal directions, and second and third frames 11B, 11C (second and third pipe members) which are fitted to walls 15s, 15t of the strut 15 in a respectively orthogonal attitude by inserting claws 163, 183 into the slits u, u2. The structure has a claw 163 on the side of the second frame 11B and a claw 183 on the side of the third frame 11C such that the claw 163 on the side of the second frame 11B faces a side face 183s of the claw 183 on the side of the third frame 11C inside the strut 15, and the numbers and positions of respective claws 163, 183 are so set that they do not cross each other.SELECTED DRAWING: Figure 15

Description

The present invention relates to a joint structure of a pipe member that is suitably used for a shelf or the like having a skeleton structure made of a pipe member.

Conventionally, as a joint structure of this type of pipe member, one in which a horizontal pipe member extending horizontally is connected to a vertical pipe member extending vertically is known (see, for example, Patent Document 1).

However, in the conventional one, a pair of slits are provided at each horizontal pipe member attachment position of the vertical pipe member, and a pair of claws are provided on each horizontal pipe member side, and the claws are hung on the slits. By stopping, the horizontal pipe member is connected to the vertical pipe member. Therefore, if it is attempted to connect the lateral pipe members orthogonal to each other at the same height position of the vertical pipe member, the insertion dimension of each claw into the vertical pipe member must be shortened (Problem 1).

As a measure to deal with such a problem 1, the claws of the lateral pipe members orthogonal to each other are crossed outside the vertical pipe member, and the claws are hooked to the vertical pipe member from the same direction. It is known (see, for example, Patent Document 2).

However, in such a configuration, since the claws intersect with each other, there is a problem that when one of the horizontal pipe members is removed, the claws on the other side of the horizontal pipe member are greatly exposed, and the other horizontal pipe member is used. In order to remove it, one of the horizontal pipe members must be once removed from the vertical pipe member, which is troublesome (Problem 2).

Jitsuto 3218606 Gazette Jitsuto 3218601 Gazette

The present invention has been made in view of such circumstances, and an object of the present invention is to solve the above-mentioned problems 1 and 2 at the same time.

The joint structure of the pipe member according to the invention according to claim 1 is a first pipe member having a pipe shape and having slits in substantially orthogonal directions, and the first pipe by inserting a claw into the slit. The second and third pipe members that are attached to the walls of the members in orthogonal positions are provided, and the claws on the second pipe member side and the claws on the third pipe member side are the first. Inside one pipe member, the number and position of each claw are set so that the claw on one pipe member side faces the side surface of the claw on the other pipe member side and does not intersect.

The joint structure of the pipe member according to the invention according to claim 2 is the one according to claim 1, wherein the second pipe member is paired on both sides of the first pipe member in a linear posture. It is arranged without any notice.

The joint structure of the pipe member according to the invention according to claim 3 is the one according to claim 1 or 2, wherein a pair of claws on the second pipe member side is provided, and the claws on the third pipe member side are provided. Is provided only one.

The joint structure of the pipe member according to the invention according to claim 4 is the one according to claim 1, 2 or 3, and the second and third pipe members are via the connecting member having the claw. It is attached to the first pipe member, and the connecting member extends outward from the connecting member main body housed inside the corresponding pipe member and the tip of the corresponding pipe member protruding from the connecting member main body. It is provided with the above-mentioned claws.

The joint structure of the pipe member according to the invention of claim 5 is that of claim 4, and the connecting member main body is fastened to the corresponding second and third pipe members by one screw, respectively. A pipe member pressure welding mechanism is provided between the connecting member main body and the pipe member to press the tip of the pipe member against the peripheral wall of the first pipe member by utilizing the tightening force of the screw. It is what has been done.

According to the present invention, the above-mentioned problems 1 and 2 can be solved at the same time, the insertion dimension of the claw into the first pipe member can be reasonably secured, and the degree of freedom regarding the assembly of the pipe member is increased. It is possible to provide a joint structure of a pipe member which can be used.

The whole perspective view of the shelf which concerns on one Embodiment of this invention. The perspective view of the state which partially removed the shelf board and the inset panel which concerns on the same embodiment. The perspective view of the state which removed all the shelf board and the inset panel which concerns on the same embodiment. An enlarged perspective view of the vicinity of the slit for attaching the hook according to the same embodiment. An enlarged perspective view of the vicinity of the slit for attaching the hook according to the same embodiment. The whole perspective view which shows the skeleton structure of the main unit of the shelf which concerns on this embodiment. An exploded perspective view showing a connecting member according to the same embodiment. The figure which shows the hook which concerns on the same embodiment. The figure which shows the connection mode of the frame which concerns on the same embodiment. The figure which shows the connection mode of the frame which concerns on the same embodiment. The exploded perspective view which shows the mounting mode of the orthogonal extension unit which concerns on the same embodiment. An enlarged view of a main part of FIG. The exploded perspective view which shows the connecting member for the extension | connection which concerns on the same embodiment. FIG. 3 is a plan sectional view of a main part of the shelf according to the same embodiment. FIG. 14 is an enlarged view of part C in FIG. The figure which shows the joint mode of the frame which concerns on the same embodiment.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 16.

In this embodiment, the joint structure of the pipe member of the present invention is applied to the shelf S in which the orthogonal extension unit S2 is connected to one end of the main unit S1.

As shown in FIGS. 1 to 3 and 5, the main unit S1 of the shelf S includes a skeleton structure 1 made of a pipe member, a shelf board 2 detachably attached to the skeleton structure 1, and an inset. It has a panel 4.

The main unit S1 of the shelf S of this embodiment will be specifically described as follows.

The main unit S1 of the shelf S is as shown in FIGS. 1 to 10, and is a frame structure 1 having a vertically extending support column 15 and horizontally extending frames 11A and 11B, and a frame structure 1 of the frame structure 1. An inset having a shelf plate 2 detachably adjacent to the inside of the frames 11A and 11B to form joints 13A and 13B between the frames 11A and 11B, and locking portions 42 and 43 inserted into the joints 13A and 13B. It is provided with a panel 4.

As shown in FIGS. 1 to 3 and 6, the skeleton structure 1 has six columns 15 arranged at both left and right ends and in the center in the width direction (hereinafter, those located at both left and right ends in FIG. 1 are “supports 15A”. , The one located in the center in the width direction may be referred to as "support 15B". In the figure, the support 15A and the support 15B are distinguished from each other) and the front and rear pair of columns 15 are connected to each other. The frame 11A of 1 and the second frame 11B for connecting the columns 15 facing each other on the left and right sides are provided. The main unit S1 of the shelf S of this embodiment is a two-stage type, and has three sets of first frames 11A arranged at the left end, the center, and the right end, and a second frame 11B forming a front-rear pair. Six sets are provided, and shelf boards 2 are arranged inside the first and second frames 11A and 11B of each stage. In that arrangement state, the mounting surface q of the shelf board 2 and the upper surfaces p of the corresponding frames 11A and 11B are substantially flush with each other, and as shown in FIG. 8, between the frames 11A and 11B and the shelf board 2. For example, joints 13A and 13B having an opening width dimension w of about 2 mm are formed, respectively.

As shown in FIGS. 1 to 6, the support column 15 is composed of a prismatic pipe member having a substantially square cross section, has an adjuster 151 at the lower end, and has a support column cap 152 attached to the upper end. In the case of this embodiment, the columns 15 facing the front and rear and the first frame 11A are rigidly connected by welding or the like, and as shown in FIG. 6, a ladder-shaped frame structure is formed. The columns 15 facing the left and right and the second frame 11B erected between the columns 15 are detachably connected via a connecting member 16, respectively.

The first frame 11A is composed of a prismatic pipe member having the same cross-sectional shape as the support column 15, and is horizontal to the side surface on the shelf board 2 side in the vicinity of both ends as shown in FIGS. 3 and 4. It is provided with a slit t for attaching a hook. The second frame 11B is composed of a columnar pipe member having the same cross-sectional shape as the support column 15 and the first frame 11A.

The connecting member 16 for connecting the second frame 11B to the support column 15 connects the support column 15 and the second frame 11B without being exposed to the outside, and is as shown in FIGS. 7, 9 and 10. In addition, the support column 15 and the frame 11B can be attached and detached by attaching and detaching one screw 161. Specifically, as shown in FIGS. 7, 9, 10 and 15, the connecting member 16 includes a connecting member main body 162 fitted into the end portion of the frame 11B and one end of the connecting member main body 162. It is provided with two claws 163 that are inserted and hooked into the pair of slits u for attaching the second frame 11B of the support column 15 that protrude from the support. As shown in FIGS. 7, 9 and 10, the connecting member main body 162 includes a bottom plate 162a, side plates 162b erected from both side edges of the bottom plate 162a, and a nut unit 162c mounted between the both side plates 162b. The bottom plate 162a and the both side plates 162b are integrally made of metal. The bottom plate 162a is provided with a screw insertion hole v related to the nut unit 162c. The nut unit 162c includes a nut holder 162d made of elastically deformable synthetic resin, and a nut 162e held on the bottom surface of the nut holder 162d so as not to rotate. The nut holder 162d is a box-shaped one having elastic claws x on both side walls, and the nut 162e is mounted in a hexagonal hole provided in the bottom wall. The nut holder 162d is configured such that the elastic claw x engages with the locking holes y of the both side plates 162b by being press-fitted between the both side plates 162b having the locking holes y of the connecting member main body 162. The nut holder 162d is attached between the side plates 162b in the engaged state, and the nut 162e is held at a position facing the screw insertion hole v of the connecting member main body 162. The two claws 163 of the connecting member 16 are each extended straight from the side plates 162b, and extend in parallel with the same separation distance as the side plates 162b.

The structure of the connecting portion between the support column 15 and the frame 11B by the connecting member 16 will be described as follows, including the assembly procedure. First, as shown in FIG. 9, the claw 163 of the connecting member 16 is inserted into the slit u on the side surface of the support column 15 and hooked. Since the claw 163 has an upward hook shape, in this state, the connecting member 16 cannot be separated from the support column 15 straight and horizontally without being tilted. At this time, only the lower edge 163b1 of one claw 163 contacts the lower edge of the slit u on the side surface of the support column 15, and the lower edge 163b2 of the other claw 163 does not contact the lower edge of the slit u on the side surface of the support column 15. The shape of each claw 163 is set as described above. That is, by bringing only one of the claws 163 into contact with the lower edge of the slit u on the side surface of the support column 15, the connecting member 16 is held by the support column 15 in a stable posture. In this posture, the end portion of the frame 11B is fitted onto the connecting member main body 162, and the tip z of the frame 11B is brought into contact with the support column 15. At this stage, the outer screw insertion hole f drilled in the frame 11B, the inner screw insertion hole v drilled in the bottom plate 162a of the connecting member 16, and the screw hole g of the nut 162e substantially correspond to each other. By tightening the screw 161 screwed to the nut 162e through the outer screw insertion hole f and the inner screw insertion hole v from the bottom, the connection between the support column 15 and the frame 11B is completed as shown in FIG. .. In this embodiment, as the screw 161, a countersunk screw type having a tapered surface 161t on the head is used, and the tapered surface of the screw 161 is used for the outer screw insertion hole f and the inner screw insertion hole v. Tapered surfaces ft and vt corresponding to 161t are provided, respectively. Then, at the stage where the end portion of the frame 11B is externally fitted to the connecting member main body 162 and the tip z of the frame 11B is brought into contact with the support column 15 without being pressed against the support column 15, the axis c1 of the nut 162e and the inner screw insertion hole v is provided. On the other hand, the dimension is set so that the axial center c2 of the outer screw insertion hole f shifts by a minute dimension d0 in the direction away from the support column 15. The minute size d0 is set to a small value that allows the screw 161 to be screwed into the nut 162e through the double screw insertion holes f and v, but in FIG. 9, it is exaggerated for the sake of clarity. is there. Then, when the screw 161 is screwed into the nut 162e and then the screw 161 is tightened, the taper of the screw 161 is finally tapered by the guiding action of the tapered surface 161t of the screw 161 as shown in FIG. The surface 161t comes into close contact with the tapered surfaces ft and dt of the double-screw insertion holes f and v, and the connecting work is completed. Due to the afferent action of the tapered surface 161t of the screw 161 tightened in the process, the frame 11B is urged relative to the connecting member 16 in the direction of the support column 15, and the tip z of the frame 11B is pressed against the support column 15. It will be. Further, due to the afferent action of the tapered surface 161t of the screw 161 described above, the claw 163 is also relatively urged in the direction of the support column 15, and the inner surface 163c of the claw is pressed against the support column 15. That is, by attaching one screw 161 to the connecting portion between the support column 15 and the frame 11B of this embodiment, the frame 11B is fixed to the connecting member 16 and the frame 11B is pressed against the support column 15 at the same time. A pipe member pressure welding mechanism P capable of being used is incorporated.

The shelf board 2 is made of sheet metal having a square shape in a plan view, and has a substantially constant thickness dimension as a whole as shown in FIG. 2, and the bottom peripheral edge thereof is the inner surface of the first frame 11A. It is detachably arranged in the space surrounded by the first and second frames 11A and 11B while being supported by the hook 14 hooked on the hook 14. The joint 13A between the shelf board 2 and the first frame 11A is formed by a convex portion 140 provided on the hook 14. The joint 13B between the shelf board 2 and the second frame 11B is formed by abutting a convex portion (not shown) provided on two parallel side surfaces of the shelf board 2 against the second frame 11B. As shown in FIG. 8, each hook 14 is inserted into the frame via a hanging plate 141 adjacent to the inner side surface of the frame 11A and a slit t provided at the upper end of the hanging plate 141 and formed in the frame 11A. It is provided with a bending plate 142 and a shelf receiving plate 143 extending in two directions from the lower end of the hanging plate 141, and is integrally made of a sheet metal material. The hanging plate 141 of the hook 14 is provided with a convex portion 140 that abuts on the side surface of the shelf plate 2. The convex portion 140 is a portion of the hanging plate 141 that is integrally bulged in two directions of the shelf plate, and the total dimension of the material thickness dimension of the hanging plate 141 and the bulging dimension of the convex portion 140 is the opening width of the joint 13A. It is set to be the same as or slightly smaller than the dimension w.

As shown in FIGS. 1 and 2, the inset panel 4 includes a square panel body 41 capable of closing the space surrounded by the support 15 and the first or second frames 11A and 11B, and the panel body 41. It is provided with locking portions 42, 43 extending vertically from 41 and inserted into joints 13A, 13B formed between the first or second frames 11A, 11B and the shelf board 2. The panel main body 41 has substantially the same thickness dimension as the left-right width dimension of the support column 15, and the outer surface and the inner surface of the panel main body 41 are substantially flush with the outer surface of the support column 15 in the mounted state, respectively. The locking portions 42 and 43 of this embodiment have a thickness dimension smaller than the opening width dimension w of the joints 13A and 13B to be inserted, but with respect to the opening direction of the joints 13A and 13B, that is, the vertical direction. Since it is slightly tilted, the inset panel 4 is configured so as not to rattle when inserted into the joints 13A and 13B.

To mount the inset panel 4 described above so as to surround the storage space formed between the upper and lower shelf boards 2, for example, under the inset panel 4 with the upper shelf board 2 lifted. The locking portion 43 is inserted into the joints 13A and 13B formed between the lower shelf plate 2 and the frames 11A and 11B, and then the upper shelf plate 2 is returned to the normal position to engage the upper part. This is done by locating the stop portion 42 in the joints 13A and 13B formed between the upper shelf plate 2 and the frames 11A and 11B.

The shelf S of the present embodiment has the orthogonal extension unit S2 connected to one end of the main unit S1 described above. As shown in FIGS. 1 to 3 and 11, the orthogonal extension unit S2 includes two columns 17 arranged at the ends, a first frame 11A connecting the two columns 17, and the first frame 11A. A third frame 11C for connecting the support columns 17 of the orthogonal extension unit S2 and the support columns 15 of the main unit S1 is provided. The orthogonal extension unit S2 is also a two-stage type, and includes three first frames 11A arranged at the ends and three sets of third frames 11C forming a left-right pair.

The columns 17, the first frame 11A, and the third frame 11C are all composed of pipe members having the same configurations as the columns 15 and the first frame 11A in the main unit S1 described above. Reference numeral 171 is an adjuster provided at the lower end of the support column 17, and reference numeral 172 is a support column cap provided at the upper end of the support column 17. Here, the columns 17 facing the left and right and the first frame 11A are rigidly connected by welding or the like, and as shown in FIG. 11, a ladder-shaped frame structure is formed. As shown in FIG. 14, a third frame 11C is detachably connected to the support column 17 via a connecting member 16, and the connection structure thereof is the support column 15 formed by the connecting member 16 of the main unit S1 described above. It is the same as the structure of the connecting portion between the and the second frame 11B. That is, the pipe member pressure welding mechanism P is also incorporated in the connecting portion between the support column 17 and the third frame 11C.

Then, as shown in FIG. 14, the orthogonal extension unit S2 is connected to the main unit S1 by connecting the third frame 11C to the support column 15 on the front side of the main unit S1.

As shown in FIGS. 15 and 16, slit u2 for mounting the third frame 11C is provided on the front center of the main unit S1 and the front surface of the support 15 at the right end. The slit u2 is provided one by one at the same longitudinal direction as the slit u for attaching the second frame 11B of the support column 15.

As shown in FIGS. 14 and 15, the connecting member 18 for additional connection for connecting the third frame 11C to the support column 15 of the main unit S1 includes the support column 15 and the third frame 11C without being exposed to the outside. As shown in FIGS. 12 and 16, the support column 15 and the frame 11C can be attached and detached by attaching and detaching one screw 181. As shown in FIGS. 12, 13 and 16, the connecting member 18 for extension has the same configuration as the connecting member 16 of the main unit S1 described above except that the number of claws 183 is one, and therefore, other than the claws 183. The corresponding parts are designated by the same reference numerals as those of the connecting member 16 and the description thereof will be omitted. One claw 183 of the connecting member 18 is formed by bending and extending the end portion of one side plate 162b, and is arranged at a central position equidistant from both side plates 162b. Further, the structure of the connecting portion between the support column 15 of the main unit S1 and the third frame 11C by the connecting member 18 for the extension is also the connection between the support column 15 and the second frame 11B by the connecting member 16 of the main unit S1 described above. It is similar to the structure of the part. That is, the pipe member pressure welding mechanism P is also incorporated in the connecting portion between the support column 15 of the main unit S1 and the third frame 11C.

With the orthogonal extension unit S2 connected to the main unit S1 in this way, the shelf boards 2 are arranged inside the first to third frames 11A to 11C of each stage. As shown in FIG. 5, horizontal hooks are attached to the inner surface of the first frame 11A of the orthogonal extension unit S2 and the outer surface of the second frame 11B in the front right half of the main unit S1 near both ends. A slit t for use is provided. The shelf board 2 has the same configuration as the shelf board 2 of the main unit described above, and is supported by the hook 14 hooked on the slit t for attaching the hook and is detachably arranged inside the frames 11A to 11C. ing. Since each hook 14 has the same configuration as the hook 14 in the main unit S1 described above, the corresponding parts are designated by the same reference numerals and the description thereof will be omitted. In that arrangement state, the mounting surface q of the shelf board 2 and the upper surface p of the corresponding frames 11A to 11C are substantially flush with each other, and the opening width between each frame 11A to 11C and the shelf board 2 is, for example, about 2 mm. Joints 13A to 13C having the dimension w are formed respectively. The joints 13A and 13B between the first and second frames 11A and 11B and the shelf board 2 are formed by the convex portions 140 provided on the hook 14. The joint 13C between the third frame 11C and the shelf board 2 is formed by a convex portion (not shown) provided on the side surface of the shelf board 2.

Then, the inset panel 4 is mounted by using the joint 13C between the third frame 11C and the shelf board 2. Since the mounting mode of the inset panel 4 is the same as that in the main unit S1 described above, detailed description thereof will be omitted.

The pipe member joint structure according to the present invention is adopted for the pipe member connecting portion X and the pipe member connecting portion Y of the shelf S described above.

First, in the pipe member connecting portion X, the second frame 11B (second pipe member) is arranged in pairs on both sides of the support column 15B (first pipe member) in a linear posture. At the same height position (longitudinal position) as the second frame 11B on the support column 15B, a third frame 11C (third pipe member) orthogonal to the second frame 11B is connected. That is, in the pipe member connecting portion X, a support column 15B (first pipe member) having a pipe shape and having slits u and u2 in substantially orthogonal directions, and claws 163 and 183 of the connecting members 16 and 18 are provided. It is provided with second and third frames 11B and 11C (second and third pipe members) that are attached to the walls of the columns 15B (first pipe member) in orthogonal positions by being inserted into the slits u and u2, respectively. The claw 163 on the side of the second frame 11B (second pipe member) and the claw 183 on the side of the third frame 11C (third pipe member) are the columns 15B (first pipe member). ), The insertion end 163a of the second frame 11B (second pipe member) side claw 163 (one pipe member side claw) is the third frame 11C (third pipe member) side claw. The number and position of each of the claws 163 and 183 are set so as to face the side surface 183s of 183 (the claw on the other pipe member side) and not to intersect. That is, in this embodiment, a pair of claws 163 on the second frame 11B side (claw on the second pipe member side) is provided, and a claw 183 on the third frame 11C side (claw on the third pipe member side). Is provided only one.

Further, in this embodiment, the second and third frames 11B and 11C (second and third pipe members) are via connecting members 16 and 18 having claws 163 and 183, respectively, as described above. It is attached to the support column 15B (first pipe member).

The connecting member main bodies 162 of the connecting members 16 and 18 are fastened to the corresponding second and third frames 11B and 11C (second and third pipe members) by one screw 161 and 181 respectively. There are, and between the connecting member main body 162 and the frames 11B, 11C (second and third pipe members), the tightening force of the screws 161 and 181 is used to utilize the tightening force of the screws 161 and 181 to form the frames 11B and 11C (second and third pipe members). A pipe member pressure welding mechanism P for pressing the tip z of the pipe member) against the peripheral wall of the support column 15B (first pipe member) is provided.

That is, the support column 15B (first pipe member) of this embodiment has a prismatic pipe shape, and each of the peripheral walls 15s facing each other is provided with a pair of slits u, and the peripheral wall substantially orthogonal to the peripheral wall 15s. A single slit u2 is provided at 15t. Then, the tip z of the second frame 11B in which the two claws 163 are hooked to the pair of slits u is pressed against the peripheral wall 15s by the pipe member pressure welding mechanism P incorporated in the connecting member 16, and one claw 183 is pressed. The tip z of the third frame 11C hooked to the single slit u2 is pressed against the peripheral wall 15t by the pipe member pressure welding mechanism P incorporated in the connecting member 18. Further, by the action of the pipe member pressure contact mechanism P, the inner surface 183c of the claw 183 is pressed against the inner surface of the peripheral wall 15t of the support column 15B.

On the other hand, in the pipe member connecting portion Y, as shown in FIG. 14, one second frame 11B (second pipe member) and one third third frame 11B (second pipe member) are attached to the support column 15A (first pipe member). The frame 11C (third pipe member) of the above is connected in a posture orthogonal to each other, but since the configuration of each part conforms to the pipe member connecting portion X, detailed description thereof will be omitted.

Here, FIG. 1 is a front perspective view of the shelf S. FIG. 2 is a front perspective view of the shelf S with the shelf board 2 and a part of the inset panel 4 removed, and FIG. 3 shows a state in which the shelf board 2 and the inset panel 4 of the shelf S are all removed. It is a front side perspective view of. A pattern is attached to the inset panel 4 in FIGS. 1 and 2. FIG. 4 is an enlarged perspective view of the vicinity of the hook attachment slit t provided in the first frame 11A, and FIG. 5 is an enlarged perspective view of the vicinity of the hook attachment slit t provided in the second frame 11B. FIG. 6 is an exploded perspective view of the main unit S1. FIG. 7 is an exploded perspective view of the connecting member 16. In FIG. 7, the connecting member main body 162 is partially broken and shown. 8A and 8B are views showing the hook 14 of the present embodiment, in which FIG. 8A is a front view of the hook, FIG. 8B is a side view, and FIG. 8C is a perspective view. .. In FIG. 8B, the shelf board 12 and the support column 15 are shown by imaginary lines. FIG. 9 is a cross-sectional view showing a state before the screw 161 is screwed to the nut 162e of the connecting member main body 162, and FIG. 10 is a cross-sectional view showing a state after the screw 161 is screwed to the nut 162e of the connecting member main body 162. is there. 9 and 10 are central normal cross-sectional views cut at the center of the second frame 11B in the depth direction, and the claw 163 on the side where the lower edge 163b1 is in contact with the lower edge of the slit u on the side surface of the support column 15. However, in order to show that only the lower edge 163b1 of the claw is in contact with the lower edge of the slit u on the side surface of the support column 15, the lower edges 163b1 and 163b2 of both claws 163 are shown in FIGS. It is shown in FIG. FIG. 11 is an exploded perspective view showing a connection mode of the orthogonal extension unit S2 to the main unit S1. FIG. 12 is an exploded perspective view showing an attachment mode of the third frame 11C to the support column 15B. FIG. 13 is an exploded perspective view of the connecting member 18 for additional stations. In FIG. 13, the connecting member main body 162 is partially broken and shown. FIG. 14 is a plan sectional view taken along a plane corresponding to the frames 11A to 11C of the second stage of the shelf S. FIG. 15 is an enlarged plan sectional view of the vicinity of the pipe member connecting portion X. In FIG. 15, the second and third frames 11B and 11C are shown by imaginary lines. Further, in FIGS. 14 and 15, the side plates 162b and the claws 163 and 183 of the connecting members 16 and 18 are shown by thick lines. FIG. 16 is an exploded perspective view showing how the second and third frames 11B and 11C are attached to the support column 15B.

According to the pipe member connection structure described above, the claws 163 and 183 on the second and third frames 11B and 11C (second and third pipe members) sides are inserted into the support columns 15 (first pipe member). The dimensions can be secured reasonably, and the degree of freedom in assembling the frames 11B and 11C to the support columns 15 can be increased. That is, in the case of such a configuration, a gap SS is formed between the insertion ends 163a of each of the two claws 163 on the side of the two frames 11B inserted in the support column 15B, and a third gap SS is formed in the gap SS. One claw 183 on the frame 11C side of the frame 11C will invade. Therefore, the claws 163 and 183 are arranged at high density in the space inside the support column 15B, and even if the second and third frames 11B and 11C that are orthogonal to each other are connected to the same height position of the support column 15B. , The restriction that the insertion dimensions of the claws 163 and 183 with respect to the support column 15B must be reduced is relaxed. Therefore, it is possible to make the support column 15B thinner without lowering the connection strength by the claws 163 and 183, and the degree of freedom in design is improved.

Further, according to such a configuration, the claws 163 on the second frame 11B side and the claws 183 on the third frame 11C side do not mesh with each other both inside and outside the support column 15, so that the frames 11B and 11C Can be freely attached and detached without affecting other frames 11C and 11B. For example, a pipe member in which two linear frames 11B (second pipe member) and a frame 11C (third pipe member) orthogonal to these frame 11B are connected to each other at the same height position of the support column 15B. In the connection portion X, only the third frame 11C can be removed from the support column 15B by loosening the screw 181 and pulling out the claw 183 on the third frame 11C side from the slit u2 of the support column 15B. The connection relationship between the second frame 11B and the support column 15B can be maintained as it is. Then, only the slit u2 remains in the support column 15B at the mark where the third frame 11C is removed, and the claws 163 and the like on the second frame 11B side are not exposed to the outside at all.

In the present embodiment, the pipe member connecting portion X is arranged in pairs on both sides of the support column 15B (first pipe member) in a posture in which the second frame 11B (second pipe member) forms a straight line. Since the present invention is applied to the above, the support column 15 and the frames 11B and 11C can be firmly connected at the positions where the second and third frames 11B and 11C are T-shaped in this way.

The present invention is not limited to the embodiments described above.

For example, in the above-described embodiment, the present invention is applied to the joint structure of the first to third pipe members having a square pillar pipe shape, but for example, a pipe member having another shape such as a round pipe shape. The present invention may be applied to the joint structure.

Further, in the above-described embodiment, a pair of claws on the second pipe member side is provided, and only one claw on the third pipe member side is provided, but the claw on the second pipe member side is inserted. The number and position of each claw may be arbitrarily set as long as the end faces the side surface of the claw on the third pipe member side and does not intersect. However, if the number and position of the claws are set as in the above-described embodiment, each claw can be arranged at a high density with a simple configuration.

Further, in the above-described embodiment, the second and third pipe members are attached to the first pipe member via a connecting member having a claw, and the connecting member is housed inside the corresponding pipe member. It is provided with a connecting member main body and a claw that protrudes from the connecting member main body and extends outward from the tip of the corresponding pipe member, and the connecting member main body corresponds to the second and third pipe members with a single screw. The tip of the pipe member is pressed against the peripheral wall of the first pipe member by using the tightening force of the screw between the connecting member main body and the pipe member. Although a configuration in which a mechanism is provided is adopted, another configuration such as providing a claw at the tip of the pipe member may be adopted. However, if a configuration using the connecting member and the pipe member pressure welding mechanism as described above is adopted, the tip of the second and third pipe members can be used with the first pipe member by utilizing the tightening force of one screw. These pipe members can be strongly connected by pressing against the peripheral wall and having a simple structure.

In addition, in the above-described embodiment, the joint structure of the pipe member connecting the second and third pipe members (second and third frames) extending horizontally to the vertically extending first pipe member (post) is formed. Although the present invention is applied, a joint of a pipe member that connects a second pipe member that extends horizontally to a first pipe member that extends horizontally and a second pipe member that extends perpendicularly to the first pipe member and a third pipe member that extends vertically. The present invention may be applied to the structure, and further, a second pipe member extending vertically and a third pipe member extending horizontally and orthogonal to the first pipe member are connected to the first pipe member extending horizontally. Of course, the present invention may be applied to the joint structure of the pipe member.

In addition, various modifications may be made as long as the gist of the present invention is not impaired.

15 (15A, 15B) ... First pipe member (post)
15s, 15t ... The wall (peripheral wall) of the first pipe member
11B ... Second pipe member (second frame)
11C ... Third pipe member (third frame)
16 ... Connecting member 162 ... Connecting member main body 163 ... Claw on the second pipe member side 18 ... Connecting member 183 ... Claw on the third pipe member side z ... Tip of the second and third pipe members P ... Pipe member pressure welding mechanism

Claims (5)

The first pipe member, which has a pipe shape and has slits in substantially orthogonal directions, and the second and third members, which are attached to the wall of the first pipe member in an orthogonal posture by inserting a claw into the slit, respectively. It is equipped with a pipe member of
The claw on the second pipe member side and the claw on the third pipe member side face each other inside the first pipe member, and the claw on one pipe member side faces the side surface of the claw on the other pipe member side. A joint structure of pipe members that sets the number and position of each claw so that they do not intersect. The joint structure of a pipe member according to claim 1, wherein the second pipe member is arranged in a pair on both sides of the first pipe member in a linear posture. The joint structure of a pipe member according to claim 1 or 2, wherein a pair of claws on the second pipe member side is provided, and only one claw on the third pipe member side is provided. The second and third pipe members are attached to the first pipe member via a connecting member having the claws, and the connecting member is a connection housed inside the corresponding pipe member. The joint structure of a pipe member according to claim 1, 2 or 3, further comprising a member main body and the claw extending outward from the tip of the corresponding pipe member protruding from the connecting member main body. The connecting member main body is tightened to the corresponding second and third pipe members by a single screw, and a tightening force of the screw is applied between the connecting member main body and the pipe member. The joint structure of a pipe member according to claim 4, wherein a pipe member pressure welding mechanism for pressing the tip of the pipe member against the peripheral wall of the first pipe member is provided.

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