Connection structure of sectional fixture, and sectional fixture comprising connection structure

Abstract

To provide a connection structure of an easy-to-assemble sectional fixture, and the sectional fixture comprising the connection structure.SOLUTION: A connection structure of a sectional fixture comprises a square tube-shaped member 2, and a connection member 5 arranged so as to intersect with an end part of the square tube-shaped member 2. The connection member 5 comprises a plurality of insertion parts 51 separated in a longitudinal direction, and inserted into the square tube-shaped member 2. A plurality of locking parts 82 locked on the insertion parts 51 respectively are provided inside the end part of the square tube-shaped member 2.SELECTED DRAWING: Figure 10

Description

Technical Field

[0001] The present invention relates to a connection structure for prefabricated furniture and prefabricated furniture having the connection structure.

Background Art

[0002] In supermarkets, convenience stores, offices, libraries, warehouses, etc., prefabricated furniture on which articles are displayed, such as shelves, is used.

[0003] For example, the prefabricated furniture shown in Patent Document 1 includes a pair of left and right rectangular tubular columns, a cross beam member, and leg members. A fitting hole for inserting the cross beam member is formed in the lower side of the side wall of the column. Further, an engagement groove into which the leg member is fitted is formed at the lower end of the column. After inserting the cross beam member into the fitting holes of the respective columns and inserting each leg member into the engagement groove of the corresponding column, the prefabricated furniture can be assembled by connecting the cross beam member and each leg member with bolts and nuts.

[0004] In the prefabricated furniture of Patent Document 1, a large number of slit holes arranged in a row in the vertical direction are formed in each column. Each slit hole is formed so that a hook in a bracket can be inserted. By inserting the hook in the bracket into the slit hole and locking it to the column, the bracket is cantilever-supported by the column. By supporting a shelf board on a pair of brackets cantilever-supported by the column, one shelf unit can be configured. Further, by changing the slit hole into which the hook in the bracket is inserted, the height position of the shelf unit can be adjusted.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] In an assembled furniture such as that disclosed in Patent Document 1, the horizontal and vertical alignment of the columns is achieved by inserting the cross beam member into each column, making the assembly simple.

[0007] On the other hand, nuts are provided on the portion of the cross beam member inserted into the column. Further, through holes through which bolts are inserted are formed in the leg members. That is, in order to connect the cross beam member and the leg member with bolts and nuts, it is necessary to align the nut, which is inserted into the column and in a state where it is difficult to visually recognize, with the through hole in the leg member.

[0008] The present invention has been made paying attention to such problems, and an object thereof is to provide a connection structure for an assembled furniture with simple assembly and an assembled furniture having the connection structure.

Means for Solving the Problems

[0009] In order to solve the above problems, the connection structure of the assembled furniture of the present invention includes a square tubular member and a connecting member arranged to intersect at an end of the square tubular member, the connecting member includes a plurality of insertion portions that are spaced apart in the longitudinal direction of the connecting member and are inserted into the square tubular member, inside the end of the square tubular member, a plurality of locking portions that are respectively locked to the insertion portions are provided. According to this, the insertion portion inserted into the end of the square tubular member is locked to the locking portion inside the square tubular member, thereby restricting movement in the pulling-out direction. In addition, since a high degree of integrity is ensured by locking the plurality of insertion portions and the locking portions respectively, the square tubular member and the connecting member can be connected by a simple method of inserting the insertion portion of the connecting member into the square tubular member.

[0010] The insertion portion is a rod-shaped member protruding from the connecting member, the square tubular member may be provided with restricting portions that respectively restrict horizontal movement along the periphery of the insertion portion. According to this, by the restricting portions that respectively restrict the horizontal movement along the periphery of the insertion portion, the integrity with respect to the horizontal directions of front, rear, left, and right and the twisting direction can be enhanced.

[0011] The restricting portion may be formed of a cylindrical body into which the insertion portion is inserted. According to this, since the restricting portion can contact the insertion portion at a plurality of points in the insertion direction of the insertion portion, the structural strength at the time of connection is excellent.

[0012] The locking portion may be a groove portion provided in the circumferential direction of the cylindrical body, and the insertion portion may be provided with a ridge portion that is locked to the groove portion. According to this, in the process of inserting the insertion portion, since the groove portion provided in the circumferential direction of the cylindrical body is locked to the ridge portion of the insertion portion, the connection work can be completed simply.

[0013] The vertical dimension from the end portion of the square tubular member to the groove portion and the vertical dimension from the upper wall of the connecting member to the ridge portion may be substantially equal. According to this, in a state where the groove portion provided in the circumferential direction of the cylindrical body is locked to the ridge portion of the insertion portion, the end portion of the square tubular member and the upper wall of the connecting member are close to each other and face each other, and relative tilting can be suppressed, and the structural strength at the time of connection is excellent.

[0014] The insertion portion may have pedestal portions that respectively extend along the opposing inner surfaces of the square tubular member at the lower end. According to this, since the pedestal portions at the lower end of the insertion portion respectively extend along the opposing inner surfaces of the square tubular member, the relative movement of the square tubular member and the connecting member in the horizontal directions of front, rear, left, and right and the twisting direction can be effectively suppressed.

[0015] In order to solve the above problems, a prefabricated furniture provided with the connection structure of the present invention includes a square tubular member and a connecting member arranged to intersect the end portion of the square tubular member, the connecting member includes a plurality of insertion portions that are spaced apart in the longitudinal direction of the connecting member and are inserted into the square tubular member, and the square tubular member is provided with a plurality of locking portions that are respectively locked to the insertion portions. According to this, the insertion part inserted into the end of the square tube-shaped member is locked with the locking part inside the square tube-shaped member, thereby restricting the movement in the pulling-out direction. In addition, since the plurality of insertion parts and the locking parts are respectively locked to ensure durability against the front-rear direction and the twisting direction, the square tube-shaped member and the connecting member can be connected by a simple method of providing the insertion part on the connecting member for the square tube-shaped member.

Brief Description of the Drawings

[0016]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Mode for Carrying Out the Invention

[0017] A mode for carrying out a fall prevention device according to the present invention and a prefabricated furniture provided with the fall prevention device will be described below based on examples.

Examples

[0018] A connection structure of a prefabricated furniture according to an embodiment of the present invention and a prefabricated furniture provided with the connection structure will be described with reference to FIGS. 1 to 10. Hereinafter, the direction indicated by the arrow in each figure will be described as the direction of the prefabricated furniture.

[0019] As shown in FIG. 1, the prefabricated furniture 1 provided with the connection structures 10 and 10' of the present embodiment is a product display shelf on which products are displayed in a supermarket, a convenience store, or the like. Note that the prefabricated furniture 1 is not limited to a product display shelf, and may be used as an article storage shelf for storing articles in a warehouse, an office, or the like.

[0020] The prefabricated furniture 1 mainly includes columns 2 and 2' as a pair of left and right rectangular tube-shaped members, horizontal connecting rods 3 and 3 provided in a pair above and below (see FIG. 1), a lattice-shaped back panel 4, leg members 5 and 5' as a pair of left and right connecting members, and three sets of shelf units 6, 6, and 7.

[0021] The columns 2 and 2' are symmetric in shape. The column 2 is arranged on the right side. The column 2' is arranged on the left side. Therefore, the left column 2' will be described as an example, and redundant explanations for the right column 2 will be simplified or omitted. The same applies to the leg members 5 and 5' and the connection structures 10 and 10'. The left leg member 5' and the left connection structure 10' will be described as examples, and redundant explanations for the right leg member 5 and the right connection structure 10 will be simplified or omitted.

[0022] The columns 2 and 2' are such that the side walls of the opposing column 2 are connected by the horizontal connecting rods 3 and 3. The columns 2 and 2', together with the horizontal connecting rods 3 and 3, form a rectangular frame. The rear panel 4 is fixed within this rectangular frame. The columns 2 and 2', the horizontal connecting rods 3 and 3, and the rear panel 4 form one panel body. The panel body is erected by the leg members 5 and 5' connected to the columns 2 and 2'.

[0023] Note that the method of fixing the horizontal connecting rod 3 to the columns 2 and 2' may be by screwing, welding, insertion, or may be appropriately changed. This also applies to the method of fixing the rear panel 4.

[0024] On the front wall of the column 2', a number of insertion holes 21a, 21a,... arranged in a single row in the vertical direction are provided. Each of the insertion holes 21a, 21a,... is provided slightly to the left (outer side) of the center in the left - right direction on the front wall.

[0025] One shelf unit 6 includes a pair of left - and - right brackets 60, 60 and a shelf board 61. For the sake of illustration, only the right - hand bracket 60 is shown in the figure, and the left - hand bracket 60 is omitted.

[0026] At the rear end of the bracket 60, a plurality of hooks 60a formed in a downward - hook shape (see Fig. 14) are provided. The hooks 60a are inserted into the insertion holes 21a in the column 2, and the bracket 60 is locked to the front wall. That is, the bracket 60 is cantilever - supported by the column 2.

[0027] Both the left and right ends of the shelf board 61 are supported by the brackets 60, 60.

[0028] As shown in Figs. 1 and 2, the lowermost shelf unit 7 includes a pair of left - and - right brackets 70, 70 and a shelf board 71 (see Fig. 1) whose left and right ends are supported by the brackets 70, 70.

[0029] Note that the shelf boards 61 and 71 have the same structure. Also, the shelf boards used for each shelf unit may have different front-back dimensions, for example, and may be appropriately changed. Further, the members supported by the brackets in each shelf unit are not limited to shelf boards, and may be wire shelves, boxes, or may be appropriately changed as long as they can accommodate articles.

[0030] Next, with reference to FIGS. 3 to 10, a connecting structure 10' for connecting the support column 2' and the leg member 5' will be described.

[0031] As shown in FIG. 3, the leg member 5' includes a leg member base 50 and fitting portions 51, 51.

[0032] The leg member base 50 is made of metal and is formed in a hollow rectangular tube shape extending in the front-back direction. Also, two casters 9, 9 are rotatably fixed to the leg member base 50.

[0033] The fitting portions 51, 51 are provided adjacent to each other with a longitudinal front-back spacing on the rear side of the upper wall 50a of the leg member base 50. Since the front and rear fitting portions 51, 51 have the same structure, here, the front fitting portion 51 will be taken as an example for description, and the description of the rear fitting portion 51 will be omitted.

[0034] Referring to FIG. 4, the fitting portion 51 is constituted by a constituent member 52 made of a metal rod. The constituent member 52 has a mounting base 53 at the lower part. The mounting base 53 has a screw portion 53a at the lower end and is inserted into holes 50c, 50c (see FIG. 8) formed in the upper wall 50a and the lower wall 50b of the leg member base 50, respectively.

[0035] The constituent member 52 is arranged such that the screw portion 53a of the mounting base 53 inserted into the hole in the upper wall 50a of the leg member base 50 protrudes downward from the hole 50c in the lower wall 50b, and a cap nut 62 is screwed onto the screw portion 53a at the lower end below the lower wall 50b, thereby restricting movement in the upward removal direction.

[0036] At the central portion in the longitudinal direction of the constituent member 52, a pedestal portion 54 having a larger diameter than the mounting base portion 53 and the hole 50c of the upper wall 50a is provided. The leg member base 50 is clamped from above and below by this pedestal portion 54 and the socket nut 62, and the mounting base portion 53 is firmly fixed to the leg member base 50 (see Fig. 8). Note that the constituent member constituting the insertion portion 51 may be welded and fixed to the upper wall 50a of the leg member base 50.

[0037] The pedestal portion 54 has chamfered corners and forms a rounded rectangle in plan view, and has sides 54a facing parallel to each other front and back and sides 54a facing parallel to each other left and right.

[0038] Above the upper part of the constituent member 52, that is, on the pedestal portion 54, a columnar rod portion 55 extends. A concave groove 55a is formed over the entire circumference in the circumferential direction at the central portion in the longitudinal direction of the rod portion 55, and a C-ring 56 is fitted in the concave groove 55a. The C-ring 56 has an inner diameter larger than the outer diameter of the concave groove 55a and smaller than the outer diameter of the rod portion 55 in the natural state, and has an outer diameter larger than the outer diameter of the rod portion 55, and functions as a convex strip protruding outward from the columnar rod portion 55 in the mounted state in the concave groove 55a. Further, the C-ring 56 elastically deforms while the two ends approach each other when receiving an external force in the diameter-reducing direction, and is configured to be buried in the concave groove 55a.

[0039] The portion of the constituent member 52 protruding above the upper wall 50a of the leg member base 50, that is, the rod portion 55 and the pedestal portion 54 function as the insertion portion 51. The upper end 55b of the outer peripheral surface of the rod portion 55 is chamfered.

[0040] As shown in Fig. 5, a locking mechanism 8 is built into the hollow space of the support column 2'. In Fig. 5, for convenience of explanation, the support column 2' is shown by a two-dot chain line. The locking mechanism 8 is composed of cylindrical bodies 80A and 80B respectively arranged in front of and behind the support column 2', and a holding member 81 for holding these cylindrical bodies 80A and 80B.

[0041] As shown in FIG. 6, the front cylindrical body 80A is disposed in contact with the inner surface 21 of the front wall of the support column 2', and the rear cylindrical body 80B is disposed in contact with the inner surface 23 of the rear wall. Hereinafter, the cylindrical body 80A will be described, and the description of the cylindrical body 80B having the same configuration will be omitted. Note that the cylindrical bodies 80A and 80B may be disposed slightly spaced apart from the inner surface 21 of the front wall or the inner surface 23 of the rear wall.

[0042] The cylindrical body 80A includes cut grooves 82, 82 which are grooves provided to penetrate in the thickness direction along the circumferential direction at the central portion. The cut grooves 82, 82 are formed to open at approximately 45 degrees facing the front and rear of the cylindrical body 80A, respectively.

[0043] The inner diameter of the hollow space of the cylindrical body 80A is slightly larger than the outer diameter of the rod portion 55 constituting the fitting portion 51 described above. Further, the outer diameter L1 of the cylindrical body 80A is substantially equal to the lateral dimension (inner dimension L2 of the support column 2) from the inner surface 20 of the left wall to the inner surface 22 of the right wall of the support column 2.

[0044] As shown in FIG. 8, the lower end of the cylindrical body 80A is disposed spaced upward from the lower end 2b of the support column 2'. Specifically, the lower end of the cylindrical body 80A is spaced upward from the lower end of the support column 2' and is larger than the height dimension of the pedestal portion 54 constituting the fitting portion 51 described above.

[0045] As shown in FIGS. 5 to 7, the holding member 81 is formed by bending a single metal plate. Specifically, it has a base portion 83 disposed opposite to the inner surface 20 of the left wall of the support column 2', an upper portion 84 projecting substantially horizontally from the upper end of the base portion 83 toward the inner surface 22 of the right wall of the support column 2', and rib portions 85, 85 projecting orthogonally from both front and rear ends of the base portion 83 toward the inner surface 22 of the right wall of the support column 2, respectively.

[0046] The rib portions 85, 85 are formed at positions where they respectively abut against the outer peripheral surfaces of the cylindrical bodies 80A, 80B arranged in contact with the inner surface 21 of the front wall and the inner surface 23 of the rear wall of the support column 2'. That is, the total dimension L3 of the front-rear dimension between the outer surfaces of the front and rear rib portions 85, 85 and the outer diameters of the cylindrical bodies 80A, 80B is substantially equal to the left-right dimension (the inner dimension L4 of the support column 2) from the inner surface 21 of the front wall to the inner surface 23 of the rear wall of the support column 2. Incidentally, the rib portions 85, 85 may be arranged slightly spaced apart from the outer peripheral surfaces of the cylindrical bodies 80A, 80B.

[0047] Threaded holes 83a, 83a are formed in the base portion 83 at vertically spaced positions. As shown in FIG. 2, holes 2c, 2c are formed in the left wall of the support column 2 at positions corresponding to the threaded holes 83a, 83a. By screwing screws 15, 15 into the threaded holes 83a, 83a from the outside of the support column 2, the base portion 83 is fixed to the support column 2 (support column 2'). Incidentally, the base portion 83 and the support column 2' are not limited to being fixed by screws, and may be, for example, fixed by welding.

[0048] Holes 86a are formed at the upper ends 86 of the cylindrical bodies 80A, 80B. Threaded holes 84a, 84a are formed at both front and rear ends of the upper portion 84 of the holding member 81. By screwing screws 87, 87 into the threaded holes 84a, 84a from the inside of the cylindrical bodies 80A, 80B, the cylindrical bodies 80A, 80B are respectively fixed to the upper portion 84. Incidentally, the cylindrical body 80A is not limited to being fixed to the upper portion 84 by a screw 87, and may be, for example, fixed to the holding member 81 by being welded to the rib portion 85.

[0049] Next, the connection method between the support column 2' and the leg member 5' will be described. In this description, it is assumed that the support columns 2, 2', the horizontal connecting rods 3, 3, and the rear panel 4 are already configured as a panel body.

[0050] First, the insertion portion 51 of the leg member 5' is inserted into the support column 2' through the lower end opening of the support column 2. The rod portions 55, 55 constituting the insertion portion 51 are respectively inserted into the inside of the cylindrical bodies 80A, 80B. At this time, since the upper ends 55b of the outer peripheral surfaces of the rod portions 55, 55 are chamfered, they are easily guided by the cylindrical bodies 80A, 80B.

[0051] As shown in Fig. 9(a), when the rod portion 55 is inserted into the cylindrical body 80A until the concave groove 55a thereof covers the concave groove 55a, the C-ring 56 abuts against the inner peripheral surface of the cylindrical body 80A and is compressed in the radial direction and buried in the concave groove 55a. Thereafter, the C-ring 56 is brought into a state of being pressed against the inner peripheral surface of the cylindrical body 80A by the elastic restoring force.

[0052] As shown in Fig. 9(b), until the upper wall 50a of the leg member base 50 abuts against the lower end 2b of the support column 2', the insertion portion 51 is inserted into the support column 2, whereby the insertion of the insertion portion 51 into the support column 2' is completed, and the leg member 5' and the support column 2' are connected.

[0053] In the process until the insertion is completed, the C-ring 56 is in sliding contact with the inner peripheral surface of the cylindrical body 80A, and when the concave groove 55a in the rod portion 55 is moved until it overlaps with the cut groove 82 formed in the cylindrical body 80A in the radial direction, the C-ring 56 abuts against the inner peripheral surface of the cylindrical body 80A, thereby being released from the external force applied in the diameter-reducing direction, and the compressed C-ring 56 returns to its natural state by the elastic restoring force. As a result, a part of the C-ring 56 in the circumferential direction enters the cut groove 82, and the C-ring 56 is locked in the cut groove 82 in the removal direction. By this locking, the leg member 5' and the support column 2' are firmly connected, and relative separation can be prevented. In this way, the cut groove 82 functions as a locking portion where the C-ring 56 in the insertion portion 51 is locked.

[0054] On the other hand, by moving the insertion portion 51 downward with respect to the support column 2' against the elastic restoring force of the C-ring 56, that is, by compressing the C-ring 56 and moving it again from the cut groove 82 to the inner peripheral surface side of the cylindrical body 80A, the locked state can be released, and the insertion portion 51 can be pulled out from the support column 2'.

[0055] Since it is the same as the above-described connection structure 10', the description of the connection structure 10 between the support column 2 and the leg member 5 will be simplified.

[0056] As described above, in the connection structure 10' of the present embodiment, since the C-rings 56, 56 of the two front and rear insertion parts 51, 51 are respectively locked to the cut grooves 82, 82 of the cylindrical bodies 80A, 80B that are locking parts, high integrity is ensured. Therefore, the leg member 5' can be connected to the support column 2' by a simple method of inserting the insertion parts 51, 51 of the leg member 5' into the support column 2'.

[0057] Further, the insertion part 51 is a rod-shaped member protruding from the leg member 5', and the cylindrical body 80A also serves as a restricting part that restricts horizontal movement along the periphery of the insertion part 51. The integrity of the support column 2' and the leg member 5' in the horizontal and torsional directions in the front-rear, left-right, and up-down directions is enhanced.

[0058] Also, since the restricting part is the cylindrical body 80A into which the insertion part 51 is inserted, the insertion part 51 can come into contact at multiple points in the insertion direction of the inner peripheral surface of the cylindrical body 80A, preventing looseness during connection and having excellent tilting structure strength.

[0059] Further, the locking part is the cut groove 82 provided in the circumferential direction of the cylindrical body 80A, and the insertion part 51 is provided with a C-ring 56 that is a convex strip where the cut groove 82 is locked. According to this, in the process of inserting the insertion part 51, since the cut groove 82 provided in the circumferential direction of the cylindrical body 80A is locked to the C-ring 56 of the insertion part 51, the connection operation can be completed simply.

[0060] As shown in FIG. 9(a), the vertical dimension L5 from the lower end 2b of the support column 2' to the cut groove 82 of the cylindrical body 80A is substantially equal to the vertical dimension L6 from the upper wall 50a of the leg member 5' to the C-ring 56. According to this, in the state where the cut groove 82 of the cylindrical body 80A is locked to the C-ring 56 of the insertion part 51, the lower end 2b of the support column 2' and the upper wall 50a of the leg member 5' are close to each other and face each other, suppressing relative tilting and having excellent structural strength during connection.

[0061] In addition, the pedestal portion 54 of the insertion portion 51 has sides 54a that are respectively adjacent to and along the inner surface 20 of the left wall and the inner surface 22 of the right wall facing the support column 2' at the lower end. According to this, the left and right sides 54a of the pedestal portion are respectively along the inner surface 20 of the left wall and the inner surface 22 of the right wall, so that the relative movement of the support column 2' and the leg member 5' in the horizontal direction and the torsional direction in the front-back, left-right directions can be effectively suppressed.

[0062] In addition, the C-ring 56 is provided at the central portion of the insertion portion 51 that extends in the vertical direction. Since the cut groove 82 is locked to the C-ring 56 at a position above the lower end 2b of the support column 2', the relative tilting of the support column 2' and the leg member 5' can be effectively suppressed, and the structural strength at the time of connection is excellent.

[0063] In addition, the prefabricated furniture 1 provided with the connection structure 10 of the present embodiment can connect the support column 2 and the leg member 5 in a simple method of inserting the insertion portions 51, 51 of the leg member 5 into the cylindrical bodies 80A, 80B inside the support column 2.

[0064] In addition, the prefabricated furniture 1 can be completed by simply connecting the leg members 5, 5' to the support columns 2, 2' with the support columns 2, 2', the horizontal connecting rods 3, 3, and the back panel 4 already forming a panel body at the time of shipment, so the assembly work is simple.

Embodiment

[0065] Next, the connection structure of the prefabricated furniture according to Embodiment 2 will be described with reference to FIGS. 11 to 13. Note that the description of the same configuration as that of Embodiment 1 will be omitted.

[0066] A concave groove 155a is formed in the upper part of the rod portion 155 that constitutes the insertion portion 151 in the connection structure 110 of the present Embodiment 2 over the entire circumference in the circumferential direction.

[0067] The locking mechanism 108 is built into the hollow space of the support column 2'. The locking mechanism 108 is formed by bending a single metal plate. Specifically, it has a base portion 181 that extends substantially horizontally in the front-rear direction of the support column 2', and rib portions 185, 185 that project downward from the front and rear ends of the base portion 181, respectively.

[0068] The locking mechanism 108 is fixed to the support column 2' by welding. The shape deformation of the base portion 181 is effectively suppressed by the rib portions 185, 185 of the locking mechanism 108.

[0069] Hole portions 180A, 180B into which the rod portions 155, 155 are respectively inserted are formed in the base portion 181. Further, slit portions 183, 183 are formed in the base portion 181 from both left and right ends thereof toward the rear, and a cantilever piece 182 is formed by surrounding three sides with these slit portions 183, 183 and the hole portion 180A. Similarly, slit portions 183, 183 and a cantilever piece 182 are formed on the hole portion 180B side.

[0070] When the insertion portion 151 of the leg member 5' is inserted into the support column 2' from the opening at the lower end of the support column 2, the rod portions 155, 155 that constitute the insertion portion 151 are respectively inserted into the hole portion 180A and the hole portion 180B of the locking mechanism 108. At this time, since the inner diameter of the hole portion 180A in the natural state is smaller than the outer diameter of the rod portion 155, the free end portion of the cantilever piece 182 that abuts against the rod portion 155 is pushed upward. The cantilever piece 182 with the free end portion retracted upward is pressed against the outer peripheral surface of the rod portion 155 by the elastic restoring force.

[0071] In the process until the insertion is completed, the free end portion of the cantilever piece 182 is in sliding contact with the outer peripheral surface of the rod portion 155, and when it moves until the concave groove 155a in the rod portion 155 and the free end portion of the cantilever piece 182 are close to each other, the free end portion of the cantilever piece 182 enters the concave groove 155a, and the cantilever piece 182 is locked in the concave groove 155a in the removal direction. By this locking, the leg member 5' and the support column 2' are firmly connected, and relative detachment can be prevented. Thus, the cantilever piece 182 functions as a locking portion that is locked in the concave groove 155a in the insertion portion 151.

[0072] Also, the opening edges of the holes 180A and 180B including the free end of the cantilever 182 function as a restricting portion that circumferentially surrounds the outer peripheral surface of the rod portion 155.

[0073] On the other hand, by moving the insertion portion 151 downward with respect to the support column 2' against the elastic restoring force of the cantilever 182, the locked state can be released and the insertion portion 151 can be pulled out from the support column 2'.

Embodiment

[0074] Next, an assembled furniture having the connection structure according to Embodiment 3 will be described with reference to FIG. 14. Note that descriptions of the same configurations as those in Embodiment 1 will be omitted.

[0075] In the assembled furniture 201 having the connection structure 10 of the present Embodiment 3, in addition to the front wall 221 of the support column 202, a plurality of insertion holes (not shown) are also formed in the rear wall 222. That is, as shown in FIG. 14, it is possible to attach the shelf units 6, 6, 7 not only to the front side but also to the rear side of the support column 202.

[0076] The leg member 205 connected to the support column 202 is provided with an insertion portion 51 at the center in the front-rear direction of the base portion 250. In this way, the position where the insertion portion is installed in the base portion may be appropriately changed.

[0077] As described above, the embodiments of the present invention have been described based on the drawings. However, the specific configuration is not limited to these embodiments, and even if there are additions or changes within the scope not departing from the gist of the present invention, they are included in the present invention.

[0078] For example, in the above-described Embodiments 1, 2, and 3, the rectangular tubular member is described as the support column and the connecting member is described as the leg member. However, the present invention is not limited to this. The rectangular tubular member may be the support column and the connecting member may be the horizontal connecting rod, or the rectangular tubular member may be the leg member and the connecting member may be the kick plate, and these may be appropriately changed. Here, the kick plate is a member installed from the front end of the left leg member to the front end of the right leg member.

[0079] In addition, if the square tube-shaped member is a leg member and the connecting member is a kick plate having an insertion portion into which it is inserted from the tip of the leg member, the slit provided in the upper wall of the leg member becomes the insertion hole of the present invention.

[0080] Also, in the first, second, and third embodiments, although the configuration has been described such that the hook or the rear piece of the bracket, which is another member, is inserted into the insertion hole, the present invention is not limited to this. A configuration in which a part of the cross member is inserted may be used, or a configuration in which a part of the fall prevention member is inserted may be used, and it may be appropriately changed.

[0081] Also, in the first, second, and third embodiments, the insertion portions are each protruded from the upper wall of the leg member, but the present invention is not limited to this. For example, two rod portions may protrude from one pedestal portion arranged on the upper wall of the leg member. In this case, the pedestal portion is not included in the insertion portion, and the two rod portions protruding from the pedestal portion each function as an insertion portion.

[0082] Also, the number of insertion portions is not limited to two, and may be three or more. If a plurality of insertion portions are provided in the front-rear direction, a plurality of insertion portions may be further provided in the left-right direction.

[0083] Also, in the first embodiment, the concave groove, which is the groove portion of the insertion portion, is provided in an endless shape over the entire circumference in the circumferential direction of the rod portion, but the present invention is not limited to this, and it may have an arc shape with ends.

[0084] Also, the configuration of the locking portion is not limited to that shown in the first and second embodiments. For example, after inserting the insertion portion into the support column, a configuration may be adopted in which the locking portion is moved horizontally by an operation portion installed outside the support column, and the locking portion is locked to a part of the insertion portion.

[0085] In the first embodiment, the ridge, i.e., the concave groove 55a and the C-ring 56, are provided in a set in the longitudinal direction of the insertion portion 51. However, the present invention is not limited to this, and a plurality of sets may be provided in the longitudinal direction of the insertion portion 51, and a plurality of locking portions, i.e., cut grooves 82, for locking to these convex shapes may be provided in the cylindrical body 80A (80B). According to this, the locking portions are locked to the ridges at a plurality of positions in the longitudinal direction of the insertion portion 51, and the leg member 5' and the support column 2' can be reliably connected.

[0086] In the first embodiment, when the C-ring 56 receives an external force in the diameter-reducing direction, both ends approach each other while elastically deforming and are buried in the concave groove 55a. That is, the radial thickness dimension of the C-ring 56 is smaller than the radial depth dimension of the concave groove 55a. However, the present invention is not limited to this, and the radial thickness dimension of the C-ring may be larger than the radial depth dimension of the concave groove. According to this, when the insertion portion is inserted, the cylindrical body is inserted while being expanded, and the leg member 5' and the support column 2' can be more firmly connected. In this case, since a force is required to expand the cylindrical body, by disposing the C-ring on the base side of the insertion portion, the insertion operation can be easily completed.

[0087] In the configuration of the second embodiment, a plurality of concave grooves 155a may be provided in the longitudinal direction of the rod portion 155, and a plurality of cantilever pieces 182 corresponding to these concave grooves may be provided in the locking mechanism 108.

Explanation of reference numerals

[0088] 1 Assembled furniture 2 Support column (square tubular member) 2b, 2d Corner 5 Leg member (connecting member) 8 Locking mechanism 10 Connecting structure 21a Insertion hole 20 - 23 Inner surface 50 Leg member base 50a Upper wall 50b Lower wall 51 Insertion portion 52 Component 53 Mounting base 54 Base part (insertion part) 55 Rod part (insertion part) 55a Groove 56 C-ring (insertion part) 60a Hook 80A, 80B Cylindrical body (restriction part) 81 Holding member 82, 82 Cutting groove (locking part) 83 Base part 84 Upper part 85, 85 Rib part 108 Locking mechanism 110 Connecting structure 151 Insertion part 155 Rod part (insertion part) 155a Groove 180A, 180B Hole part (restriction part) 181 Base part 182 Cantilever piece (locking part) 183, 183 Slit 185, 185 Rib part 201 Assembled furniture 202 Support column 205 Leg member 250 Base part

Claims

1. A connecting structure of a prefabricated furniture, comprising a corner cylindrical member and a connecting member arranged to intersect the end of the corner cylindrical member. The connecting member includes a plurality of insertion portions spaced apart in the longitudinal direction of the connecting member and inserted into the corner cylindrical member. Inside the end of the corner cylindrical member, a plurality of locking portions respectively locked to the insertion portions are provided.

2. The insertion portion is a rod-shaped member protruding from the connecting member. The corner cylindrical member is provided with a restricting portion for respectively restricting horizontal movement along the periphery of the insertion portion. The connecting structure of the prefabricated furniture according to claim 1.

3. The restricting portion is composed of a cylindrical body into which the insertion portion is inserted. The connecting structure of the prefabricated furniture according to claim 2.

4. The locking portion is a groove portion provided in the circumferential direction of the cylindrical body, and the insertion portion is provided with a convex strip locked to the groove portion. The connecting structure of the prefabricated furniture according to claim 3.

5. The vertical dimension from the end of the corner cylindrical member to the groove portion is substantially equal to the vertical dimension from the upper wall of the connecting member to the convex strip. The connecting structure of the prefabricated furniture according to claim 4.

6. The insertion portion has a pedestal portion along the inner surfaces of the opposite sides of the corner cylindrical member at the lower end. The connecting structure of the prefabricated furniture according to claim 1.

7. A prefabricated furniture, comprising a corner cylindrical member and a connecting member arranged to intersect the end of the corner cylindrical member. The connecting member includes a plurality of insertion portions spaced apart in the longitudinal direction of the connecting member and inserted into the corner cylindrical member. The corner cylindrical member is provided with a plurality of locking portions respectively locked to the insertion portions.

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