JP2021067340A - Connection structure of tubular structural material - Google Patents

Abstract

To provide a connection structure of a tubular structural material in which complicated molding is unnecessary, and which contributes to constructing a frame structure having high accuracy without needing skill, and can set desired connection strength according to applications.SOLUTION: A connection structure of a tubular structural material that connects the tubular structural material with another structural material, comprises: an engaging plate 3 that is passed to support holes 2 and 2 facing each other across a hollow part of the tubular structural material at a connection end part of the tubular structural material; a connection part of the other structural material passed to the opening part of the connection end part in an unrotatable manner; and a fastening means that allows the connection part and the engaging plate 3 to be brought close to each other by a screw pair.SELECTED DRAWING: Figure 1

Description

The present invention relates to a connecting structure of a tubular structural material.

Tubular structural materials such as pipes and tubular structural materials lacking a part of the side wall such as C-shaped materials are made of various materials and are conventionally connected by the following methods.
Regarding the connection of the C-shaped material, for example, from the viewpoint that screws for fixing the frame and the panel are not required, and the frame can be easily attached to the panel with a simple structure, the tongue piece for engagement and the engagement are used. From the viewpoint of improving the overall rigidity of the housing while reducing the thickness and weight of the members and the connecting structure (see, for example, Patent Document 1 below) in which the holes are elastically engaged and held. A housing in which each frame has a required thickness and is composed of a first surface portion and a second surface portion that are at least orthogonal to each other, and an extension surface portion that is bent at a right angle from the first surface portion is provided at an end portion of each frame. Examples thereof include a connecting structure of a body frame (see, for example, Patent Document 2 below).

Regarding the connection of pipes, for example, when connecting two pipes in a cross state, it is not necessary to use metal fittings dedicated to each pipe, and operations such as alignment of pipes are easy and extremely easy. From the viewpoint of realizing an easy pipe connector, it has two pipe retainers having a U-shaped cross section for inserting the pipe and flat plate portions integrally formed on both sides of the U-shaped portion, and pipes are provided in each U-shaped portion. When constructing a connecting tool (for example, see Patent Document 3 below) equipped with a bolt hole for inserting and connecting to a cross state with a bolt and nut, and a simple structure using square timber as an aggregate, not limited to metal and wooden. , Rattling does not occur due to the connecting metal fittings for square members (see, for example, Patent Document 4 below) that facilitate both skeleton and disassembly, and the pressure contact force between the members using the spring action of the members instead of the tightening force of the screws. Examples thereof include a member connecting device for assembled furniture (see, for example, Patent Document 5 below) capable of obtaining a strong member connecting state.

For example, regarding the connection of both the C-shaped member and the pipe, when connecting the square hollow member such as a grooved member having a U-shaped cross section or a square pipe in a state of being bent at an appropriate angle, the connection can be made extremely easily. Examples thereof include a coupling device (see, for example, Patent Document 6 below).
Furthermore, welding is adopted when higher strength is required.

Jitsukaisho 60-071176 Gazette Japanese Unexamined Patent Publication No. 2005-056882 Utility Model Registration No. 3098386 Japanese Unexamined Patent Publication No. 2011-052425 Japanese Unexamined Patent Publication No. 2-225810 Jikkai Sho 63-028904

However, in the techniques described in Patent Documents 1, 2 and 5, the connection strength depends on the strength of the structural material and cannot be set to a desired connection strength depending on the application, and the structural material has a complicated connection structure. There is a problem that it needs to be done.
Further, the patent document 3 has a problem that the accuracy of the frame structure to be assembled is inferior because there is a possibility that a deviation may occur between the connecting tool and the structural material to be connected, and the patent document 4 is bent. The structure is complicated due to molding, and Patent Document 6 has a problem that the structure is complicated.
Welding is difficult to work at the installation location, so it involves complicated work of assembling the frame two-dimensionally or three-dimensionally and transporting it to the installation location, and is skilled in satisfying a certain level of accuracy. Workers are required to be involved.

The present invention has been made in view of the above circumstances, does not require complicated molding, contributes to the construction of a highly accurate frame structure without requiring skill, and is a desired connection depending on the application. It is an object of the present invention to provide a connecting structure of a tubular structural material whose strength can be set.

The connecting structure of the tubular structural material according to the present invention made to solve the above problems is a connecting structure for connecting the tubular structural material with another structural material, and the tubular structural material is connected at the connecting end of the tubular structural material. A engaging plate that is passed to the support holes that face each other across the hollow portion of the above, a connecting portion of the other structural material that is rotatably passed to the opening of the connecting end portion, and the connecting portion and the said. It is characterized by providing a fastening means capable of bringing the engagement plate close to each other by screw pairs.

The connecting portion is not limited as long as the fastening means can be attached, and if the connecting structure does not impair the function, a plate-shaped structural material or another tubular structural material to be connected can be used. It can be appropriately adopted from a side plate, a hook plate that is passed to the support holes that face each other with a hollow portion of another tubular structural material to be connected, and the like.
Further, as the fastening means, the use of a bolt after drilling a screw hole in the connecting portion of the engaging plate or the other structural material, or the connection portion of the engaging plate and the other structural material is transparent. A method such as mounting bolts and nuts after drilling holes can be mentioned.
The engagement plate is formed of a material that undergoes plastic deformation or elastic deformation due to its proximity to the connection portion, and allows deformation of the engagement plate between the engagement plate and the connection portion. A configuration with a gap can be adopted.

In order to connect and extend the tubular structural material, it is possible to adopt the engagement plate that is passed to the support holes that face each other across the hollow portion of the other tubular structural material to be connected as the connecting portion. it can.
Further, by utilizing this connecting structure, in order to support or connect other members (including structural members) in a direction different from the connecting direction, a holding portion for supporting the other members is integrated with the end of the engagement plate. Can be prepared.

In order to automatically improve the assembly accuracy of the structure as the fastening means functions in the tightening direction, the shape of the joint surface of the tubular structural material and the joint surface of the tubular structural material are in contact with each other. It is possible to adopt a configuration in which the shapes of the base surfaces match.
Further, in order to determine and set an appropriate tightening degree according to the application, it is possible to adopt a configuration in which the engagement plate is provided with a flat plate-shaped key portion having a uniform thickness.

According to the connection structure of the tubular structural material according to the present invention, the connection of tubular structural materials for various purposes having different required strengths regardless of the size of the lot, for example, furniture, fences, play equipment or assembling warehouses, garages. Alternatively, it can be used for connecting tubular structural materials for constructing a house or the like simply by changing the material and size of a retaining plate, a fastening means, or the like.

Further, the connecting structure of the tubular structural material according to the present invention has an extremely simple structure and structure, and is easy to use. Therefore, for example, even if it is a structural material generally used for a structure that requires welding. , It can be transported in the state of a structural material and easily assembled at the site, and even in the disassembly work, it can be performed relatively easily.

Since the connecting structure of the tubular structural material according to the present invention has a plate-like shape of each member forming the tubular structural material and the connecting structure or its main part, each member and its main part are precisely cut by a CNC processing machine or the like. The connecting structure can be composed of a uniform tubular structural material or other member in which a hole or the like through which a connecting portion of the engaging plate and another structural material to be connected is passed is precisely bored. As a result, the tubular structural material and other members having no such quality variation are pulled together by the screw kinematic pair of the same fastening means and assembled, and the structural material is uniformly connected as a connecting structure without selecting a worker in charge of assembly. The effect can be obtained.

The engagement plate is made of a material that undergoes plastic deformation or elastic deformation due to its proximity to the connection portion of another structural material to be connected, and the engagement plate is deformed between the engagement plate and the connection portion. By adopting a configuration having a gap that allows the above, it is possible to adjust the connecting strength between the tubular structural material and the other structural material to be connected to the tubular structural material, and it is possible to prevent loosening of the fastening due to vibration or the like.

Further, by adopting a engaging plate that is passed to the support holes of other tubular structural materials to be connected as the connecting portion, the tubular structural material is extended while appropriately abutting the joint surfaces via the connecting structure. By integrally providing a holding portion for supporting the other member at the end of the engagement plate, another member such as a blind plate or another structural material can be provided in a direction different from the connecting direction. Can be supported or connected.

By adopting a configuration in which the form of the joint surface of the tubular structural material and the form of the base surface of the other structural material with which the joint surface of the tubular structural material abuts match, the fastening means functions in the tightening direction. Along with this, the adhesion between the joint surface and the base surface of the tubular structural material, which has been made so that the shapes match in advance, is improved, the assembly accuracy of the structure is automatically improved, and anyone can assemble the structure with high accuracy.
Further, by adopting a configuration in which the engagement plate is provided with a flat plate-shaped key portion having a uniform thickness, it is possible to set an appropriate tightening degree for the engagement plate according to the application.

It is a perspective view which shows the embodiment (Examples 1, 3 and 4) of the connecting structure of the tubular structural material by this invention. It is a perspective view which shows an example (Example 1) of the connection structure of the tubular structural material by this invention. It is a perspective view which shows an example (Example 2) of the connection structure of the tubular structural material by this invention. An example (Example 2) of a connecting structure of a tubular structural material according to the present invention is shown in (A): perspective view, (B): side view and (C): front view, and (D): front view of a sealing plate. .. An example (Example 2) of a connecting structure of a tubular structural material according to the present invention is shown in (A): perspective view, (B): side view and (C): front view, and (D): front view of a sealing plate. .. It is a perspective view which shows an example (Example 3) of the connection structure of the tubular structural material by this invention. It is sectional drawing which shows an example (Example 3) of the connection structure of the tubular structural material by this invention. It is a perspective sectional view which shows an example (Example 3) of the connecting structure of the tubular structural material by this invention. It is a perspective sectional view which shows an example (Example 3) of the connecting structure of the tubular structural material by this invention. It is a perspective sectional view which shows an example (Example 3) of the connecting structure of the tubular structural material by this invention. It is a perspective sectional view which shows an example (Example 3) of the connecting structure of the tubular structural material by this invention.

Hereinafter, embodiments of the connecting structure of the tubular structural material according to the present invention will be described in detail with reference to the drawings.
FIG. 1 shows an example of a frame-shaped structure including a connecting structure for connecting a tubular structural material with another structural material.
Here, the structural material refers to a member forming a base or a frame of a structure, and the tubular structural material is a structural material such as a pipe in which a side wall covering a hollow portion is continuous over the entire circumference, or a hollow portion such as a C-shaped material. A structural material that lacks one direction of the side wall that covers the wall.

The example shown below shows an example of a frame-shaped structure using the tubular structural material (hereinafter referred to as “square pipe”) formed as a square tubular hollow material.
The connecting structure adopted in this example includes a engaging plate 3 that is passed to a pair of support holes 2 and 2 that face each other with a hollow portion sandwiched between the connecting ends of the square pipe, and an opening at the connecting end. It is a connecting structure including a connecting portion of another structural material rotatably passed to the portion and a connecting screw (tightening means) 5 for pulling the engaging plate 3 toward the connecting portion by a screw pair even (FIG. 1). reference).

The connecting structure of this example is a connecting structure for connecting the tubular structural material with a sealing plate (connecting portion of another structural material; hereinafter the same in this embodiment) 4 that seals the opening thereof.
The square pipe 14 of this example has a series of side plates covering its four side surfaces to form a hollow structure having a square cross section.
The square pipe 14 has an opening surrounded by a lower end edge (joint surface) orthogonal to the longitudinal direction of the square pipe 14 at the lower end serving as a connecting end of the square pipe 14, and is provided with adjacent two side plates. At the center of the lower end edge (joint surface), engagement claws 6 and 6 along the lower end edge are provided (see the lower right figure of FIG. 1 and FIG. 2).

The square pipe 14 is provided with a pair of support holes 2 and 2 facing each other with a hollow portion interposed therebetween at its lower end (see FIG. 2).
Each of the support holes 2 and 2 in this example is bored in an equal rectangular shape, and each of them is located at the same distance from the lower end edge (joint surface) of the square pipe 14 with respect to the lower end edge (joint surface). Are arranged in parallel.
By cutting and molding with a laser processing machine or the like so that the angle formed by the lower end edge (joint surface) of the four side plates and the virtual plane formed by them and the longitudinal direction of the four side plates is an accurate right angle. The assembly accuracy of the frame-shaped structure using this connecting structure will be improved.

The sealing plate 4 of this example arranges a plurality of square pipes 14 at equal intervals and in a row, and serves as a base for erecting each of the square pipes 14 at a right angle (see FIG. 1).
The sealing plate 4 is provided with square support holes 7 and 7 into which the engagement claws 6 and 6 can be easily fitted along the outer edge of the arrangement area of each square pipe 14 (see lower right of FIG. 1 and FIG. 2). As a result, the sealing plate 4 is rotatably passed to the opening of the connecting end of the square pipe 14.
Each arrangement area is provided with a through hole 8 for inserting the connecting screw 5 in the center thereof (see FIG. 2). Further, if necessary, a mounting hole (not shown) for screwing the caster 21 can be provided.

This example includes a engagement plate 3 that is passed to a pair of support holes 2 and 2 that face each other with a hollow portion of the square pipe 14 in between at the shortest distance. The engagement plate 3 includes a head portion 3a that hangs on the side edges of the support holes 2 and 2 and a key portion 3b that communicates the pair of support holes 2 and 2, and the through hole 8 is provided in the central portion of the key portion 3b. It has a screw hole 3c facing the head (see FIG. 6).
The engagement plate 3 in this example is a plate having a uniform thickness cut into a T shape.

This example is configured as described above. First, the engagement plate 3 is inserted from the side of the square pipe 14 until the head portion 3a covers the peripheral edge of the support hole 2, and the key portion 3b thereof is a pair of support holes. Pass it over the hollow portion of the square pipe 14 so as to fully relate to 2 and 2.
Next, the engaging claws 6 and 6 at the lower end edge of each square pipe 14 are fitted into the support holes 7 and 7 of the sealing plate 4, and the connecting screw 5 is inserted into the through hole 8 from the back side of the sealing plate 4. , The screw hole 3c of the engagement plate 3 facing the through hole 8 and the male screw of the connection screw 5 are screwed together, and the engagement plate 3 is drawn toward the sealing plate 4 by both screw pairs. ..

The engagement plate 3 is formed by molding a material such as stainless steel or an aluminum alloy, which undergoes plastic deformation or elastic deformation due to the attraction, into a plate shape.
The head 3a of the engagement plate 3 may be provided with a hook hole 10 or a hook 11 as a clue when the engagement plate 3 is pulled out from the support holes 2 and 2 (see FIG. 3). Further, the hook can be used to support another member such as a blindfold plate or another structural material as a holding portion for supporting the other member.
In this example, the support holes 2 and 2 are arranged at positions separated from the lower end edge (joint surface) of the square pipe 14 by about 0.5 mm to 3.0 mm in the longitudinal direction. As a result, a gap 9 is formed between the engagement plate 3 and the sealing plate 4 to allow deformation of the engagement plate 3, and the plasticity or elasticity of the engagement plate 3 is increased according to the tightening condition of the connecting screw 5. It will be demonstrated.

When the engagement plate 3 is pulled toward the sealing plate 4 by the screw pair even, when the engagement plate 3 and the surface of the sealing plate 4 facing the engagement plate 3 come into contact with each other, the plasticity or elasticity of the engagement plate 3 causes the engagement plate 3 to come into contact with each other. The connection structure between the square pipe 14 and the sealing plate 4 to be phase-connected is stably maintained.

The connecting structure of this example is one of the connecting structures for connecting the tubular structural material to the sealing plate (connecting portion of other structural materials) 4 that seals the opening thereof, and is a single square pipe 14 and the sealing plate 4. And are connected (see FIG. 3).
The square pipe 14 of this example has a series of side plates covering its four side surfaces to form a hollow structure having a square cross section, and is formed at the end of the four side plates serving as a connecting end of the square pipe 14. An opening surrounded by a lower end edge (joint surface) orthogonal to the longitudinal direction of the square pipe 14 is provided.

In this example, the lower end edges (joining surfaces) of the two side plates facing each other are provided with the engaging claws 6, 6 (see FIG. 4) or the holding claws 12, 12 (see FIG. 5) along the lower end edge.
Further, the square pipe 14 includes a pair of support holes 2 and 2 facing each other at the lower end thereof.
The support holes 2 and 2 are bored in the same rectangular shape, and are arranged at the same distance from the lower end edge (joint surface) of the square pipe 14 and parallel to the lower end edge (joint surface). There is.
The engaging claws 6 and 6 or the holding claws 12 and 12 and the support holes 2 and 2 may be provided on the two side plates or on the four side plates on the premise that they are provided on the two opposite side surfaces of the square pipe 14. Good (see Figures 4 and 5).
The assembly accuracy is improved by cutting and molding so that the angle formed by the lower end edge (joining surface) of the four side plates and the virtual plane formed by them and the longitudinal direction of the four side plates is an accurate right angle. It becomes.

The sealing plate 4 of this example seals the opening of one square pipe 14 and serves as a base for mounting a tool such as a leg 13 or a caster 21.
The sealing plate 4 has a holding portion α (see FIG. 4) or a engaging portion β (see FIG. 5) into which the engaging claw 6 or the holding claw 12 can be easily fitted along the lower end edge (joining surface) of the opening of the square pipe 14. (See) is provided integrally with the sealing portion γ. As a result, the sealing plate 4 is rotatably passed to the opening of the connecting end of the square pipe 14.
The sealing portion γ is provided with a through hole 8 for inserting the connecting screw 5 in the center thereof.
In the example shown in FIG. 3, the leg portion 13 is integrally provided on the head of the connecting screw 5, but if necessary, a mounting hole for separately screwing the leg portion 13, the caster 21, or the like is provided. (Not shown) can also be provided.
The connection method of this example is the same as that of the first embodiment.

The connecting structure of this example is a connecting structure that connects the end face of the square pipe 1 and the side plate of another square pipe 14 (see FIGS. 1, 6 to 11).
The square pipes 1 and 14 of this example have a series of side plates covering the four side surfaces thereof to form a hollow structure having a square cross section.
The square pipe 1 is surrounded by an end edge (joint surface; hereinafter the same in this embodiment) orthogonal to the longitudinal direction of the square pipe 1 at the end of a four-side plate serving as a connecting end of the square pipe 1. The opening is provided, and the engagement claws 6 and 6 along the edge are provided on the edge of the two side plates facing each other in the opening (see the middle figure on the right in FIG. 1).

The square pipe 1 includes a pair of support holes 2 and 2 facing each other at the end on the connecting end side. The support holes 2 and 2 are bored in the same rectangular shape, and are arranged at the same distance from the end edge of the connecting end of the square pipe 1 and parallel to the end edge (see FIG. 6). ).
The assembly accuracy is improved by cutting and molding so that the angle formed by the edge of the connecting end of the four side plates and the virtual plane formed by them and the longitudinal direction of the four side plates is an accurate right angle. It becomes.
At that time, the shape of the joint surface of the square pipe 1 and the shape of the base surface of the other square pipe 14 with which the joint surface of the square pipe 1 abuts match, and the side surface of the other square pipe 14 is the base. If the surface is provided with a form that forms a plane or a virtual plane that is in full or intermittent contact with the virtual plane formed by the joint surface, the structure is assembled as the fastening means functions in the tightening direction. The accuracy will be automatically improved to the intended accuracy.

The side plate (inner plate) 14a in which the arrangement area of the square pipe (hereinafter referred to as “vertical rail”) 14 as the vertical rail in the example shown in FIG. 1 is set is a square pipe (hereinafter referred to as “horizontal rail”” as a plurality of horizontal rails. ) 1s are arranged at regular intervals and in a row, and serve as a base for horizontally erection of each cross rail 1.
The vertical rail 14 has square support holes 15 and 15 in which the engagement claws 6 and 6 provided at the end edge of the connecting end of the horizontal rail 1 can be easily fitted along the outer edge of the arrangement area of each horizontal rail 1. Be prepared. As a result, the inner plate (connecting portion of other structural materials; hereinafter the same in this embodiment) 14a of the vertical rail 14 is rotatably passed to the opening of the connecting end of the horizontal rail 1. It becomes.
The inner plate 14a of the vertical rail 14 in which each arrangement area is set is provided with a through hole 8 for inserting the connecting screw 5 in the center thereof, and the opposite side plate (outer plate) of the side plate 14a in which the through hole 8 is bored is provided. ) 14b is provided with a window hole 16 facing the through hole 8.

This example includes a engagement plate 3 that is passed to a pair of support holes 2 and 2 that face each other with the hollow portion of the cross rail 1 sandwiched between them at the shortest distance. The engagement plate 3 includes a head portion 3a that hangs on the side edges of the support holes 2 and 2 and a key portion 3b that communicates the pair of support holes 2 and 2, and the through hole 8 is provided in the central portion of the key portion 3b. It is provided with a screw hole 3c facing the head.
The engagement plate 3 in this example is a plate having a uniform thickness cut into a T shape.

This example is configured as described above. First, the engagement plate 3 is inserted from the side of the cross rail 1 (upper in this example) until the head portion 3a covers the peripheral edges of the support holes 2 and 2. The key portion 3b is mounted in a state of being passed over the hollow portion of the cross rail 1 so as to sufficiently cover the pair of support holes 2 and 2.
Next, the engagement claws 6 and 6 at the end edge of each horizontal rail 1 are fitted into the support holes 15 and 15 of the inner plate 14a of the vertical rail 14, and the connecting screw 5 is inserted from the inside of the inner plate 14a of the vertical rail 14. Is inserted through the window hole 16, and the screw hole 3c of the engagement plate 3 facing the window hole 16 and the through hole 8 and the male screw of the connecting screw 5 are screwed together to form an inner plate of the vertical rail 14. The engagement plate 3 is pulled toward 14a by a pair of screws (see FIG. 6).

The engagement plate 3 is formed by molding a material that undergoes plastic deformation or elastic deformation due to the attraction.
As a result of the support holes 2 and 2 being arranged at positions separated from the edge of the cross rail 1 in the longitudinal direction by about 0.5 mm to 3.0 mm, the engagement plate 3 and the inner plate 14a of the vertical rail 14 A gap 9 that allows the deformation of the engagement plate 3 is formed between the two, and the deformation of the engagement plate 3 is allowed (see FIG. 7).
That is, the engaging plate 3 and the surface of the inner plate 14a of the vertical rail 14 facing the engaging plate 3 are brought into contact with each other by pulling the engaging plate 3 toward the inner plate 14a of the vertical rail 14 by the screw pair. The connection structure of the members phase-connected by the plasticity or elasticity of the engagement plate 3 is stably maintained (see FIG. 8).
The head 3a of the engagement plate 3 may be provided with a hook hole 10 or a hook 11 as a clue when the engagement plate 3 is pulled out from the support holes 2 and 2 (see FIG. 3).

In the third embodiment, the end portion of the upper plate 1a, which is the upper surface of the horizontal rail 1 erected at the highest level, may be extended as a blockade piece 17 for sealing the upper opening of the vertical rail 14 (FIG. 3). 1 See the upper right figure). In this example, the structure of the edge of the other side plate (lower plate 1b) of the cross rail 1 is the same as that of the third embodiment.
Further, the side plate (inner plate) 14a of the vertical rail 14 in which the arrangement area of the horizontal rail 1 is set is provided with a through hole 8 for inserting the connecting screw 5 in the center thereof, as in the third embodiment. A window hole facing the through hole 8 in the opposite side plate (outer plate) 14b of the inner plate (connecting portion of another structural material; hereinafter the same in this embodiment) in which the through hole 8 is bored. 16.

The cross rail 1 of this example is located on the left and right ends of the connecting end of the side plate (upper plate) 1a which is the upper surface thereof, and is located on the outermost side of the vertical rail 14 located on the outermost side of the partition wall (frame-like structure). A pair of pinching claws 18 and 18 related to the upper end edge (joining surface) of the side plate (outer plate) 14b are provided, and are located behind the upper plate 1a (on the opposite end side of the connecting end) to the innermost side of the vertical rail 14. A support hole (not shown) into which the engagement claw 22 along the upper end edge is fitted is provided in the central portion of the upper end edge (joint surface) of the side plate (inner plate) 14a (see the upper right figure of FIG. 1).
Further, the cross rail 1 is located at the center of the end edge (joint surface) of the side plate (lower plate) 1b which is the lower surface of the cross rail 1, and the side plate (inner plate) 14a located on the innermost side of the vertical rail 14. A engaging claw 19 that fits into a support hole (not shown) is provided (see the upper right figure of FIG. 1).

The vertical rail 14 of this example fits between the pair of pinching claws 18 and 18 on the upper end edge of the outer plate 14b of the vertical rail 14 located on the outermost side of the partition wall, and the pinching claws 18 and 18 are fitted. The support hole (shown) provided with the engagement claws 20 that support from the side and below, and the engagement claws 19 provided on the edge of the side plate 1b that is the lower surface of the cross rail 1 are fitted into the inner plate 14a of the vertical rail 14. ).
The structure of the engagement plate 3 is the same as that of the first to third embodiments.

This example is configured as described above. First, the engagement plate 3 is inserted from the side of the cross rail 1 (lower in this example) until the head portion 3a covers the peripheral edges of the support holes 2 and 2. The key portion 3b is mounted in a state of being passed over the hollow portion of the cross rail 1 so as to sufficiently cover the pair of support holes 2 and 2.
Next, the engaging claw 22 is fitted into the support hole of the upper plate 1a of the horizontal rail 1, and the engaging claw 19 at the end edge of the lower plate 1b of the horizontal rail 1 is supported by the inner plate 14a of the vertical rail 14. The engagement claw 20 is fitted into the hole between the sandwiching claws 18 and 18 of the upper plate 1a of the horizontal rail 1, and is connected to the through hole 8 formed in the inner plate 14a of the vertical rail 14. The screw 5 is inserted through the window hole 16, and the screw hole 3c of the engagement plate 3 facing the through hole 8 and the window hole 16 and the male screw of the connecting screw 5 are screwed together to form the vertical rail 14. The engaging plate 3 is pulled toward the inner plate 14a by a pair of screws.

In this example, one of the support holes 2 and 2 is arranged at a position separated from the edge (joining surface) of the lower plate 1b of the cross rail 1 in the longitudinal direction by about 0.5 mm to 3.0 mm, and the other is arranged. , The upper plate 1a of the cross rail 1 is arranged so as to face each other at the position of the shortest distance from one of the support holes 2. As a result, a gap 9 is formed between the engagement plate 3 and the inner plate 14a of the vertical rail 14, which allows the engagement plate 3 to be deformed, and the engagement plate 3 is provided according to the tightening condition of the connecting screw 5. It will exert plasticity or elasticity.

For example, when the engagement plate 3 is attracted to the inner plate 14a by the screw pair even, the engagement plate 3 and the surface of the inner plate 14a facing the engagement plate 3 come into contact with each other, and the plasticity of the engagement plate 3 Alternatively, the elastic connection structure of the horizontal rail 1 and the vertical rail 14 is stably maintained.
In the third and fourth embodiments, the end faces of the square pipes can be connected to a plurality of side plates for one square pipe (see FIG. 11), and the configurations of the vertical rail 14 and the horizontal rail 1 are reversed. It can also be done (see FIG. 10).

The present invention is not limited to the above embodiment, but is a connecting structure for connecting a tubular structural material to another structural material, and faces each other with a hollow portion sandwiched between connecting ends of the tubular structural material. The engaging plate 3 passed to the support holes 2 and 2, the connecting portion of another structure rotatably passed to the opening of the connecting end, and the engaging plate 3 screwed toward the connecting portion. The specific form can be changed as long as the connecting structure is provided with a fastening means that is attracted by even number (may be attracted in the opposite direction).

For example, the tubular structural material may be a circular, elliptical or polygonal pipe, or the side plate may have a continuous structure over the entire circumference.
Even in the connecting portion of other structural materials, the side plate of the tubular structural material, the sealing plate, the engagement plate attached to the tubular structural material to be connected, or other structural material, etc., can be used as a base for attracting the engagement plate. Anything that plays a role and can be brought close to each other by screw-to-even fastening means can be appropriately selected.
Further, in the above embodiment, an example in which the engagement plate and the connecting portion of the other structural material face each other in parallel is shown, but a configuration in which they do not face in parallel can also be adopted.

α pinching part, β engaging part, γ blocking part,
1 square pipe (horizontal rail), 1a upper plate, 1b lower plate,
2 Support hole,
3 Engagement plate, 3a head, 3b key part, 3c screw hole,
4 Blockade,
5 connecting screws, 6 hooks, 7 support holes, 8 through holes, 9 gaps,
10 hook holes, 11 hooks, 12 pinching claws, 13 legs,
14 square pipe (vertical rail), 14a inner plate, 14b outer plate,
15 support holes, 16 window holes,
17 Blockade, 18 Claws, 19 Claws, 20 Claws,
21 casters,
22 Claws,

Claims (6)

It is a connecting structure that connects a tubular structural material with other structural materials.
At the connecting end of the tubular structural material, a hooking plate that is passed to the supporting holes that face each other across the hollow portion of the tubular structural material, and
With the connecting portion of the other structural material rotatably passed to the opening of the connecting end portion,
A connecting structure of a tubular structural material, which comprises a fastening means capable of bringing the connecting portion and the engaging plate close to each other by screw pairs. The engagement plate is formed by molding a material that undergoes plastic deformation or elastic deformation due to its proximity to the connecting portion.
The connecting structure of a tubular structural material according to claim 1, wherein a gap is provided between the engaging plate and the connecting portion to allow deformation of the engaging plate. The connecting structure of a tubular structural material according to claim 1 or 2, wherein the connecting portion is a side plate of another tubular structural material to be connected. Either of claims 1 or 2, wherein the connecting portion is the engaging plate that is passed to the supporting holes that face each other with the hollow portion of another tubular structural material to be connected sandwiched between them. The connecting structure of the tubular structural material described in Crab. The connecting structure according to any one of claims 1 to 4, wherein a holding portion for supporting another member is integrally provided at an end portion of the engagement plate. The connecting structure according to any one of claims 1 to 5, wherein the engagement plate includes a flat plate-shaped key portion having a uniform thickness.

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