JP4707158B1 - Joining structure of hollow square material and bathroom unit installation table - Google Patents

Abstract

[PROBLEMS] To simplify processing of a member when joining a hollow square member, in particular, a square steel pipe, to a T-shape, without using welding or a separate joining member, and with a minimum number of man-hours. Provided are a low-cost joining structure that can be accurately assembled and has sufficient strength, and a bathroom unit installation table to which the joining structure is applied.
A structure in which a first member made of hollow square material and an axis of a second member are crossed and joined to each other, and a relief portion of the second member is fitted into a relief hole provided in the first member. Fasten with bolts and nuts that penetrate the member. The tenon hole of the first member has a shape having one or a plurality of claw portions on the upper and lower sides of a substantially rectangular shape, and the cross section of the tenon portion of the second member corresponds to the tenon hole. Concave surfaces that are recessed toward the inside of the hollow square member are provided on the upper and lower horizontal wall surfaces of the first member, and at the time of fastening, the concave surfaces are fixed in close contact with the upper and lower surfaces of the ridge portion fitted in the ridge holes. The width of the upper concave surface is a width that can fix the head of the bolt, and the width of the lower concave surface has a margin with respect to the diameter of the nut.
[Selection] Figure 5

Description

  TECHNICAL FIELD The present invention relates to a joining structure for joining hollow square members, particularly members made of square steel pipes, with their axes crossing each other, and a bathroom installed in a building, which is formed by joining hollow square members by the joining structure. It is related with the bathroom unit installation stand which supports a unit.

  For structures such as buildings, structures, temporary structures, and various types of fixtures, a structure in which a member made of a hollow square member, in particular, a square steel pipe, is used for the purpose of reducing the weight and securing the strength. As a joining form in the joining structure of such hollow square members, a structure is mainly used in which the axes of two members are joined on the same plane and joined, but if roughly divided, the end portions of the members are joined in an L shape. And the form which joins the edge part of the other member to the T shape at the side of one member, and those forms are combined as needed.

  Comparing the L-shape and the T-shape, the L-shape joins the ends of hollow square materials that are relatively easily deformed, so that it is difficult to ensure strength compared to the T-shape, and the end of the member that becomes the joining point The processing of the shape of the part is also more complicated and often increases costs. In addition, the L-shape is mainly used at the corner of the skeleton where it is necessary to join without leaving a member length, whereas the T-shape is used at a wide joint as well as the corner. As the number of members increases, T-shaped joint points tend to increase. Therefore, in the construction of the skeleton structure by joining the hollow square members, the cost can be reduced by using T-shaped joining for joining the members as much as possible and adopting a simple and reliable joining structure.

As a structure of such T-shaped joining, when the hollow square member used as a member is a square steel pipe, it has mainly been welded or fastened by bolts and nuts, or these have been used together. However, welding work at a construction site requires welding equipment including dangerous materials such as gas cylinders and workers having welding skills, which increases costs in terms of safety measures and personnel costs. If a semi-finished member that has been welded to the joint portion in advance is assembled at the site, the cost at the site can be suppressed. However, the semi-finished member is bulky and is inconvenient to transport and carry to the site, which also causes an increase in cost.

  On the other hand, as a structure in which the members are fastened and joined with bolts and nuts, etc., a structure in which the members are directly engaged with each other and then fastened with bolts and nuts, and a separate joining member, for example, a “plate” There is a structure in which mutual members are indirectly joined through, for example, or a structure in which they are used in combination. By the way, in the structure that is directly fitted, the strength of the member decreases due to the processing of the shape of the joint part of both members, so it is indirectly in the joint part where a large load or stress is assumed, such as a housing of a building or structure. A structure to be joined is used, and a structure to be directly fitted is generally used at a joint portion such as a floor surface, a ceiling material, a support for an interior material, a temporary structure, a frame such as a fixture. In the structure that directly fits, the processing process of the shape of the joint part of both members causes a cost increase, and in the structure that is indirectly joined via a separate joining member, the number of members and the number of fastening points are increased, and fastening work is performed. The increase in the number of processes becomes a factor of cost increase.

  By the way, in interior construction of buildings, especially floor construction and installation of bathroom units in ordinary houses and apartment houses, floor mounts and bathroom units that support the floor and bathroom units with a flat frame made by joining square steel pipes A method of assembling an installation stand and suspending it between the bases or supporting it by lifting it from the slab surface with a support column is used. In particular, although load resistance is not required as much as the building frame, it supports not only the weight of the unit itself and the weight of the human body but also the weight of water in the bathtub, and a gap for installing a drain pipe etc. under the floor of the unit. In a bathroom unit installation table that needs to be secured, a frame structure in which square steel pipes are joined is often used.

Such a bathroom unit installation table is manufactured in accordance with the size and shape of the bathroom unit, but for the purpose of simplifying the construction process with a minimum number of members and reducing costs, for example, for general housing, As disclosed in Patent Document 1 (Japanese Patent Laid-Open No. 2008-214927), another square steel pipe is joined in a T-shape to a square steel pipe passed between parallel horizontal base materials, and the frame of the installation table is attached. The structure to be formed is known. In addition, as for an apartment house, as shown in Non-Patent Document 1 (example of a conventional apartment house bathroom unit installation table, see FIG. 18), two half-pieces for supporting the bath unit on the bathtub side and the washroom side respectively. A construction method in which a completed member is manufactured by welding a square steel pipe to a T-shape, is carried into a construction site, and they are combined using a joining member and installed.
JP 2008-214927 A Example of a conventional bathroom unit installation table for an apartment (Fig. 18)

  In any of the above-described prior arts, a structure in which square steel pipes are joined to each other in a T-shape is required. However, in Patent Document 1, a square steel pipe that hits a T-shaped vertical bar is joined to a joint end having an inverted L-shaped cross section at the joint end. After the members are welded, they are fastened by bolts and nuts that penetrate the flat plate of the joining member and the square steel pipe that hits the horizontal bar. In Non-Patent Document 1, two square steel pipes are simply welded to form a T-shape. It is joined to the mold. In both cases, not only the welding process increases the cost, but also the durability and accuracy of the welded part and joint member are problematic in the former, and the semi-finished member is bulky in the latter. It is inconvenient in terms of carrying in and construction in a narrow bathroom of an apartment house.

Further, as the structure of the T-shaped joining of such hollow square members, in addition to those described above, it is also conceivable to use a joining structure as shown in FIGS. 6 and 7 of Patent Document 2 (Japanese Patent Laid-Open No. 2008-115934), for example. However, this structure is disadvantageous in terms of strength because the contact area between the members at the joint is extremely small due to the property of the hollow square member, and the load concentrates on a limited contact portion.
2008-115934 gazette

  When adopting a T-shape as much as possible at the joint location of the member, simplify the processing of the joint portion of the member, carry the member to the construction site in a disassembled state, and do not use welding or a separate joining member If a non-skilled worker can assemble and construct it easily and accurately with a minimum number of man-hours and realize a joint structure with sufficient strength, it will be possible to manufacture parts, transport and carry it to the construction site, and complete the assembly process. Cost can be reduced. The problem to be solved by the present invention is to provide a new method for joining hollow square members that satisfies all the requirements, and a bathroom unit installation table to which the method is applied.

In order to solve the above-mentioned problem, the invention described in claim 1 is a structure in which a first member and a second member made of a hollow square member are joined with their axes intersecting, and the wall surface of the first member is Of these, the two vertical walls have a substantially rectangular ridge hole, and the ridge hole has a shape having one or a plurality of claw portions on each of the upper and lower sides thereof, and the two horizontal walls are respectively in the direction of the inside of the square member. It has a recessed surface that is depressed, and the end of the second member has a cross-sectional shape corresponding to the above-mentioned relief hole, and the relief portion is narrowed down by bending all of the horizontal wall and a part of the vertical wall. A cross-sectional shape corresponding to the relief hole is formed, the relief portion is fitted through the relief hole, and a bolt and a nut vertically penetrated through the bolt hole provided in the concave wall surface and the horizontal wall surface of the relief portion. Hollow square member joining structure characterized in that one member and second member are fastened A.

  In the field of wooden construction, the “hozo-braided structure” is traditionally used when joining timbers to the T-shape. As is well known, the “hozo-assembled structure” is a structure in which a tenon portion formed by processing a side-convex shape in which an end portion of a second member is provided with a step in the vertical direction is provided in the vertical surface of the first member. It is a simple and excellent structure in which both members are joined by fitting into a hole.

Such a “hozo-assembled structure” can be applied to a joining structure in which hollow square members, particularly members made of square steel pipes, which are technical fields of the present invention, are joined with their respective axes crossing each other. As shown in the drawing, a substantially rectangular relief hole is provided in two vertical walls of the wall surface of the first member, a joining end portion of the second member is provided with a sectional shape corresponding to the relief hole, and the relief portion is Both members can be joined by being inserted and fitted into the relief holes. There are cases where the first member penetrates the first hole in a wooden building and a blind tube, but in the case of a hollow square material represented by a square steel pipe, the inner hole is hollow. The tenon portions of the two members are inserted through the tenon holes and fitted.

Here, the structure of the tenon portion shown in FIG. 1 is formed by processing the end of the second member into a laterally convex shape having a step only in the vertical direction. If an attempt is made to form a shape, an extra part is always generated on the wall surface of the member. For example, this extra part must be cut once and then rejoined, resulting in an increase in cost.

In order to solve this problem, in the invention described in claim 1, the shape of the relief hole of the first member is a vertically symmetric shape having two claw portions on the upper and lower sides of a substantially rectangular shape as shown in FIG. And the cross section of the relief part of the 2nd member is made into the shape fitted to this. If the cross-section of the ridge part is such a shape, first cut the entire horizontal wall and a part of the vertical wall at the start point of the ridge part of the second member, and then use a press to move the ridge part up and down. By compressing from the direction and bending the wall surface, it is possible to narrow down at a stretch, and it is possible to form the relief portion with a minimum processing cost. In addition, since the groove is formed in the upper and lower portions along the axial direction of the member, the grooves corresponding to the claw portions are formed in the upper and lower portions, so that the strength against bending or twisting of the upper portion itself is also improved. . In addition, the shape and the number and position of the claw portions constituting the burrow hole are arbitrary, but from the viewpoint of ease of narrowing of the burrow portion, two each of the upper and lower sides are vertically moved as described above. It is appropriate to arrange them symmetrically.

On the other hand, since both members come into contact with each other only with the thickness of the vertical wall in the through hole of the first member, the strength is insufficient. Moreover, since both members after joining are easily pulled out simply by fitting the tenon portion into the tenon hole, the joint portion of both members needs to be fastened separately by a fastening member such as a bolt and nut. In that case, the bolt head and nut may protrude from the upper surface and the lower surface of the first member, respectively, which may cause inconvenience due to contact with other external members.

In order to solve these problems, the upper and lower horizontal walls of the first member are each provided with a concave surface that is recessed in the inner direction of the member, and the back surface of the concave surface is in close contact with the horizontal surfaces of the upper and lower portions of the second member. As a result, both members come into contact with each other over a wide range, and the fitting becomes tight. Further, the bolts are vertically penetrated from the upper concave surface to the bolt holes provided at predetermined positions on the concave surface and the horizontal wall surface of the ridge portion, and are fixed with nuts on the lower concave surface, so that both members are completely fastened. To complete the joining. According to such a joint structure, the bolt holes can be matched by simply fitting the two members completely at the construction site, and then the construction can be completed with the minimum process of tightening the nut through the bolt. Very easy. In addition, it is desirable that a minimum gap necessary for facilitating the fitting of the two members is formed between the back surface of the concave surface and the horizontal wall surface of the ridge portion. In that case, the both surfaces are brought into close contact and fixed by the tension force toward the inside of the first member at the time of fastening with the bolt and the nut.

In addition, it is desirable that the depression depth from the upper and lower horizontal wall surfaces of the two concave surfaces be equal to or higher than the height of the head of the bolt that fastens both members at least in the upper concave surface. As a result, the head of the bolt can be flush without protruding from the upper horizontal wall surface of the joined member, thus preventing interference with the object supported by the member, for example, flooring or the bottom surface of the bathroom unit. Can do. On the other hand, in the lower concave surface, whether or not all or part of the nut protrudes from the lower horizontal wall surface of the member is arbitrary, but considering the workability of the nut tightening work at the time of joining, other members due to the protrusion of the nut It is desirable to project the wrench so that it can be easily operated unless interference with the wrench becomes a problem.

Next, in the invention described in claim 2, the width of the concave surface of the two horizontal walls of the first member with respect to the member axis is set such that one of the bolts is closely fitted to the head of the bolt, and the other 2. The hollow square member joining structure according to claim 1, wherein a width having a gap with respect to an outer diameter of the nut is set.

  After the first member and the second member are fitted to each other, they are finally fastened with bolts and nuts. Here, after inserting a normal bolt into a bolt hole and screwing a nut with a tool such as a wrench, the nut must be rotated with the other hand while fixing the head of the bolt with one hand. Depending on the situation at the construction site and the installation situation of the members, it may be difficult to work while holding the bolt head and nut with both hands, and work efficiency may be reduced.

In order to solve this problem, in the invention according to claim 2 , the width with respect to one member axis of the concave surfaces of the two horizontal walls of the first member is a width with which the nut is closely fitted. By doing so, as soon as the installer inserts the bolt into the bolt hole, the horizontal wall cross-sections of both edges of the concave surface automatically fix the head of the bolt, so that it is not necessary for the installer to fix it with one hand. On the other hand, since the width of the other concave surface is a width having a gap with respect to the outer diameter of the nut, a tool such as a wrench can be easily put into the concave portion when the installer rotates the nut. As described above, since the installer can fasten the bolt and nut with one hand, the work efficiency is improved.

Next, the invention described in claim 3, tenon hole of substantially rectangular said first member, according to claim 1, characterized in that it comprises an overhanging portion projecting from the member vertical wall in the center portion of each the upper and lower sides Or it is the joining structure of the hollow square material in any one of Claim 2 .

  The flange portion serves not only as a guide when inserting the tip of the second portion of the second member into the first hole of the first member to facilitate the fitting operation of both members, By providing it at a position corresponding to the horizontal surface of the ridge part, the support area of the ridge part can be expanded together with the concave surface provided inside the first member, and the fitting of both members can be made stronger. The flange portion can be easily formed by cutting out the vertical wall of the first member and leaving a part of the wall surface when bending the hole, and bending it into a flange shape.

Finally, the invention described in claim 4 is a bathroom unit installation base formed by joining members made of hollow square bars, and at least one of the joint portions of the members is provided in any one of claims 1 to 3 . It is a bathroom unit installation base joined by the joining structure of the hollow square material described in the above.

  In the case of a bathroom unit for general housing, the bathroom unit installation base is usually mounted so as to support the bathroom unit by suspending it between the base wood, etc. It is common to use an integral structure, and it is preferable to use the hollow square member joining method according to the present invention at the joining point where other members are joined in a T-shape to the main structural member suspended between the foundations. is there. On the other hand, in the case of a bathroom unit for an apartment house, the bathroom unit installation base is usually installed by being floated by a plurality of support pillars from the floor slab surface. Therefore, an integrated structure is not necessarily required in terms of strength, and it is general to have a structure that is divided into a bathtub side and a washing area side. Therefore, the hollow square member joining method according to the present invention may be applied to T-shaped joints of all members, or only to T-shaped joints of bathtub-side members that have a relatively large load to be supported. You may do it.

  According to the present invention, in the case of constructing a skeleton structure formed by joining hollow square members, in particular, square steel pipes, in a T-shape, members manufactured and processed by a minimum number of steps can be carried into the construction site in a disassembled state, With a simple and minimal man-hour work that simply fits the horn part into the hole and fastens it with bolts and nuts, even a non-skilled worker can easily and reliably join the skeleton structure with high strength. Since assembly work is possible, the cost can be reduced through the whole process of manufacturing the member, transporting / loading to the construction site, and assembly work. The present invention can be applied to a wide range of fields such as buildings, structures, temporary structures, and various skeletons of furniture, etc., but interior construction of buildings, particularly floor construction and installation of bathroom units in ordinary houses and apartment houses It is suitable for the construction of a floor structure and a bathroom unit support structure in construction, and has a great effect on cost reduction in the manufacture and construction of a standardized bathroom unit installation table.

  Hereinafter, a hollow square member joining structure according to the present invention (hereinafter referred to as “main joining structure”) and a bathroom unit installation base (hereinafter referred to as “present bathroom”) formed by joining members made of hollow square members by the joining structure according to the present invention. An embodiment of a “unit installation base” will be described in detail with reference to FIGS.

  2 to 5 are perspective views showing the outline of the present joining structure. First, FIG. 2 is a perspective view of the first member 10 made of a hollow square member as viewed from above. In T-shaped joining, the first member 10 is a member that hits a T-shaped horizontal bar. The first member 10 is a quadrangular prism composed of two vertical walls 11 and 12, an upper horizontal wall 13, and a lower horizontal wall 14. The cross section of the first member may be a regular square, but in the case of a structure that assumes a load from above, it is desirable that the vertical wall be a rectangular cross section that is longer than the horizontal wall. The vertical walls 11 and 12 are respectively provided with the same shape and size of the tenon holes 15 and 16 (not shown), and the axis connecting the centers of both the tenon holes 15 and 16 is orthogonal to the center axis of the first member 10. . The tenon holes 15 and 16 have a symmetrical shape with two claw portions 17 on the upper and lower sides of a substantially rectangular shape, and the central portions of the upper and lower sides are respectively one of the wall surfaces of the vertical walls 11 and 12. A collar portion 18 is formed by bending the outside at a right angle while leaving the portion. The tenon holes 15 and 16 can be formed by cutting out the vertical walls 11 and 12 and bending the flange 18 in one step by a press using a mold. On the other hand, the upper horizontal wall 13 is provided with an upper concave surface 19, and the upper concave surface 19 is obtained by making two parallel cuts with an appropriate length in the axial direction of the first member 10 in the upper horizontal wall 13. Thus, the first member 10 is formed by being recessed in an inverted trapezoidal shape in the inner direction. In addition, on two cross-sectional portions generated in the upper horizontal wall 13 by the above-described cutting, a symmetrical hanging portion 20 is provided that hangs down in a substantially semicircular plane toward the inside of the first member 10. At this time, the interval between the two drooping portions 20 is set to a width that allows the head portion of a bolt (not shown) that finally tightens the member to be sandwiched and fixed. Furthermore, a first member upper bolt hole 21 is provided at the center of the upper concave surface 19. The upper concave surface 19 can also be formed by performing the cutting, the formation of the bolt hole, the depression, and the formation of the hanging portion 20 in one step by a press machine using a mold.

  FIG. 3 is a perspective view of the same first member 10 viewed from below. A lower concave surface 22 having a first member lower bolt hole 23 at a position corresponding to the upper concave surface 19 in FIG. 2 is formed on the lower horizontal wall 14 in the same manner as the upper concave surface 19. The first member upper bolt hole 21 and the first member lower bolt hole 23 have the same vertical axis, and the upper concave surface 19 and the lower concave surface 22 are parallel to each other. However, the width of the lower concave surface 22 is wider than that of the upper concave surface 19, and is a width having a margin with respect to the diameter of a nut 51 (not shown) for finally fastening a member. Is not provided.

  FIG. 4 is a perspective view of the second member 30 made of a hollow square member as viewed from above. In the T-shaped joining, the second member 30 corresponds to a T-shaped vertical bar. The second member 30 is also a quadrangular column made up of two vertical walls 31 and 32 and horizontal walls 33 and 34, and the cross-sectional shape excluding the relief 35 is the same shape and size as that of the first member 10. The end portion of the second member 30 is formed in the ridge portion 35, and the length of the ridge portion 35 is at least the length of the horizontal width of the first member 10, and the protruding length of the flange portion 18. It is preferable that the length is such that the first member 10 penetrates and protrudes when the two members are fitted. The cross-sectional shape of the relief portion 35 is a shape that closely contacts with the relief holes 15 and 16 provided in the first member 10 with no gap when fitted. Therefore, the horizontal portion 35 has a vertically and horizontally symmetrical shape having two parallel groove portions 36 each having a cross-sectional shape corresponding to the shape of the claw portion 17 on each of the upper and lower surfaces, and horizontal planes 37 and 38 sandwiched between the groove portions 36. Have The horizontal planes 37 and 38 are provided with a second member upper bolt hole 39 and a second member lower bolt hole 40, respectively. When the two members are fitted, the axis connecting the bolt holes is the first member upper bolt. The four bolt holes are completely overlapped with the axis of the hole 21 and the first member lower bolt hole 23, and the outer surface of the horizontal surface 37 and the inner surface of the upper concave surface 19, and the outer surface of the horizontal surface 38 and the lower concave surface 22. When the bolts are fastened, the two members are completely fixed and firmly joined together.

  FIG. 5 is a perspective view of the joining structure in which the first member 10 and the second member 30 are fitted in a T shape and fastened with the bolt 50, as viewed from above. The tenon part 35 of the second member 30 protrudes through the tenon hole 15 of the first member 10, and the flange part 18 is in close contact with the horizontal surfaces 37 and 38 of the tenon part 35. Further, since the head of the bolt 50 is fixed so as to be sandwiched between the hanging portions 20 of the first member, the operator does not need to hold the bolt head with one hand when fastening with the bolt nut.

  FIG. 6 is a perspective view of the joint structure as viewed from below. The bolt 50 has both members fastened by a nut 51 and a washer 52 on a lower concave surface 22 provided on the lower horizontal wall 14 of the first member 10. As described above, since the lower concave surface 22 has a width with a margin with respect to the diameter of the nut 51, the operator can easily perform the tightening operation of the nut 51.

  FIG. 7 is a detailed elevation view of the first member 10 as viewed from the direction of the vertical wall 11. FIG. 8 is an elevational view of the first member 10 viewed from the member axial direction. FIG. 9 is a plan view of the first member 10 viewed from the direction of the upper horizontal wall 13. FIG. 10 is a plan view of the first member 10 viewed from above. FIG. 11 is an elevational view of the second member 30 as viewed from the direction of the axis portion 35. FIG. 12 is a plan view of the second member 30 viewed from above. FIG. 13 is a plan view of the second member 30 viewed from below. 14 is an elevation view of the first member 10 viewed from the direction of the vertical wall 11 when the second member 30 is fitted to the first member 10 and fastened by the bolt 50, the nut 51, and the washer 52. It is. FIG. 15 is an elevational view of the state in which the joining is completed as viewed from the direction of the vertical wall 31 of the second member. FIG. 16 is a plan view of the state where the joining is completed as viewed from above. FIG. 17 is a plan view of the state where joining is completed as viewed from below.

  FIG. 18: is the perspective view which looked at the example of the conventional bathroom unit installation stand for apartment houses which concerns on the above-mentioned nonpatent literature 1 from the downward direction. In this example, the installation base is configured to be divided into two frames, a bathtub side frame 60 and a washing place side frame 61, and the bathtub side frame 60 is formed on the cross beam A62 corresponding to the first member 10 and the second girder A62. Two stringers A63 and crossbeams B64 corresponding to the member 30 are directly welded to each other. Further, the stringer material A62 and the stringer material B63 are respectively provided with the auxiliary beam member 65 at the center thereof and inserted at both ends thereof. On the other hand, the washing frame side frame 61 includes a stringer material C68, a stringer material D69, and a stringer material E70 corresponding to the second member 30 between the beam member B66 and the beam member C67 corresponding to the first member 10. Is passed to form a “day” -shaped structure, and each stringer and crossbeam are joined by welding or screwing. Four support pillars 71 are attached to each of the two frames. At the construction site, each frame is assembled separately in an inverted state, and finally both frames are connected via a connecting material (not shown). Screw and finish. In this installation stand, when the washing place side frame 61 is screwed, it can be brought into the construction site in a disassembled state, but since the bathtub side frame 60 is carried in a pre-welded and assembled state, it is welded at the manufacturing stage. A process is required, and the packaging is bulky.

  On the other hand, FIG. 19 is the perspective view which looked at each joining state of the bathtub side frame 80 and the washing-room side frame 81 of this bathroom unit installation stand from the downward direction. The members used are the same as those in FIG. 18, but the joining structure of hollow square members according to the present invention is applied to all of the T-shaped joining points of a total of eight members. In this figure, a resin cap 72 having a substantially rectangular parallelepiped shape is inserted into each end portion of the tenon portion of the second member protruding from the tenon hole of the first member at each T-shaped joining point. The resin cap 72 is a reinforcing member for preventing the deformation of the cross-sectional shape of the tenon portion, but is not essential if the member itself has sufficient rigidity.

FIG. 20 is a perspective view of the packing state when the bathtub side frame 80 of the bathroom unit installation table is carried into the construction site as viewed from below. It can be seen that the members can be bundled in a disassembled state and bundled together with a packing tape to be compact.

As mentioned above, although embodiment of the joining structure of the hollow square material which concerns on this invention, and the bathroom unit installation stand to which this joining structure was applied was described, this invention is not limited to the said embodiment, Technical of this invention Modifications or changes can be made within the scope of the idea, and they belong to the technical scope of the present invention.

  The joining structure of hollow square members according to the present invention can be applied to a wide range of fields such as buildings, structures, temporary structures, and various frames of furniture. In particular, it is suitable for building floor structures and bathroom unit support structures in interior construction of buildings, especially floor construction and installation of bathroom units in ordinary houses and apartment buildings. In manufacturing and construction, it is possible to construct a strong installation stand with simple and minimal man-hours without using welding, which is very effective in reducing costs.

It is a perspective view which shows the joining structure of the hollow square material which applied the "hozo structure" . It is the perspective view which looked at the 1st member 10 from the upper part. It is the perspective view which looked at the 1st member 10 from the lower part. It is the perspective view which looked at the 2nd member 30 from the upper part. It is the perspective view which looked at the joining structure which fitted the 1st member 10 and the 2nd member 30 in the T shape, and completed fastening with the volt | bolt 50 from upper direction. It is the perspective view which looked at the joining structure which fitted the 1st member 10 and the 2nd member 30 in the T shape, and was fastened with the volt | bolt 50 from the downward direction. FIG. 3 is an elevation view of the first member 10 viewed from the direction of the vertical wall 11. It is the elevation which looked at the 1st member 10 from the member axial direction. It is the top view which looked at the 1st member 10 from the upper part. It is the elevation which looked at the 1st member 10 from horizontal wall 14 direction. It is the elevation which looked at the 2nd member 30 from the direction of the axis part 35. It is the top view which looked at the 2nd member 30 from the upper part. It is the top view which looked at the 2nd member 30 from the lower part. FIG. 3 is an elevational view of a state in which the second member 30 is fitted to the first member 10 and fastened by a bolt 50, a nut 51, and a washer 52 to complete joining from the direction of the vertical wall 11 of the first member 10. It is the elevation which looked at the state which the 2nd member 30 was fitted to the 1st member 10, and was fastened with the volt | bolt 50, the nut 51, and the washer 52, and was joined from the perpendicular wall 31 direction of the 2nd member. FIG. 3 is a plan view of a state in which the second member 30 is fitted to the first member 10 and fastened by a bolt 50, a nut 51, and a washer 52 to complete the joining from above. FIG. 4 is a plan view of a state in which the second member 30 is fitted to the first member 10 and fastened by a bolt 50, a nut 51, and a washer 52 to complete the joining, as viewed from below. It is the perspective view which looked at the example of the conventional bathroom unit installation stand for apartment houses concerning nonpatent literature 1 from the lower part. It is the perspective view which looked at the joined state of this bathroom unit installation stand from the downward direction. It is the perspective view which looked at the package at the time of carrying in the construction site the bathtub side frame 80 of this bathroom unit installation stand from the downward direction.

DESCRIPTION OF SYMBOLS 10 1st member 11 Vertical wall 12 Vertical wall 13 Upper horizontal wall 14 Lower horizontal wall 15 Relief hole 16 Relief hole 17 Claw part 18 Gutter part 19 Upper concave surface 20 Drop part 21 First member upper bolt hole 22 Lower concave surface 23 First member Lower bolt hole 30 Second member 31 Vertical wall 32 Vertical wall 33 Horizontal wall 34 Horizontal wall 35 Hose portion 36 Groove portion 37 Horizontal surface 38 Horizontal surface 39 Second member upper bolt hole 40 Second member lower bolt hole 50 Bolt 51 Nut 52 Washer 60 Conventional Bathtub side frame in an example of a bathroom unit installation table for an apartment house in Japan 61 In a case of a bathroom unit installation table for a conventional apartment house
63 Stringer A
64 Stringer B
65 Auxiliary girder 66 Horizontal girder B
67 Cross girder C
68 Stringer C
69 Stringer D
70 Stringer E
71 Support pillar 72 Resin cap 80 Bath unit side frame of the bathroom unit installation table 81 Washing station side frame of the bathroom unit installation table

Claims (4)

Hollow first member and a second member made of square timber is a structure that is joined by intersecting its axis, has a substantially rectangular pivot hole in the vertical wall of the dihedral of the wall surface of the first member, the The tenon hole has a shape having one or a plurality of claw portions on the upper and lower sides thereof, and the two horizontal walls have concave surfaces recessed in the direction of the inside of the square member, and the end of the second member is formed in the tenon hole. The horn portion has a corresponding cross-sectional shape, and the horn portion has a cross-sectional shape corresponding to the horn hole by bending and narrowing all of the horizontal wall and a part of the vertical wall. A hollow square member characterized in that the first member and the second member are fastened by bolts and nuts that pass through and fit and vertically penetrate the bolt holes provided in the concave wall and the horizontal wall surface of the horn part. Bonding structure. The width of the concave surface of the two horizontal walls of the first member with respect to the member axis is set such that one of the bolts is in close contact with the head of the bolt and the other has a gap with respect to the outer diameter of the nut. 2. The joined structure of hollow square members according to claim 1 , wherein the structure is a width. 3. The hollow square member according to claim 1, wherein the substantially rectangular hollow hole of the first member has a flange portion protruding from a member vertical wall at a central portion of each of the upper and lower sides thereof. Bonding structure. It is a bathroom unit installation stand formed by joining members made of hollow square material, and at least one part of the joint part of the members is joined by the joint structure of hollow square materials according to any one of claims 1 to 3. A bathroom unit installation stand.

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