JP7249651B2 - Joint member manufacturing method, joint member, and framework structure - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for manufacturing a joint member for joining tubular members, a joint member manufactured by the manufacturing method, and a frame structure formed by joining tubular members with the joint member. .

2. Description of the Related Art Conventionally, joining members (joints) for joining two or more tubular members have been used to join tubular members such as square pipes and round pipes to form a frame structure. For example, there has been proposed a joint member in which a plurality of cylindrical portions in which tubular members are fitted are joined (see, for example, Patent Document 1). The joining member disclosed in Patent Document 1 is formed by joining three cylindrical portions so as to form a right angle with each other.

Also, a joint member has been proposed in which a plurality of portions into which tubular members are fitted are joined together (see, for example, Patent Document 2). In the joint member of Patent Document 2, a plurality of leg insertion portions, which are portions where tubular members are fitted on the outside, are formed integrally with a block-shaped base so as to form right angles with each other. A two-legged type in which the parts extend in two directions forming a right angle, a three-legged type in which three leg inserts extend in three directions forming a right angle, and four leg inserts extending in four directions forming a right angle. A four-leg type with five leg inserts extending in five directions at right angles, and a six-leg type with six leg inserts extending in six directions at right angles are available. .

Such joining members are roughly classified into those made of resin and those made of metal. Resin-made joint members have problems of low mechanical strength and poor weather resistance. On the other hand, metal joining members are superior to resin joining members in terms of mechanical strength and weather resistance, but have the problem of distortion due to differences in thermal expansion coefficients. To explain this problem, conventionally, in the case of integrally molding a metal joint member, it has generally been manufactured by die casting. As exemplified in Patent Literatures 1 and 2, in order to form a three-dimensional frame structure, joint members having portions extending in at least three orthogonal directions are integrally molded, and can only be manufactured by die casting. It is from.

However, metal tubular members (pipes) are extruded members. Even if the same metal is used as a base, the alloy for extrusion molding (alloy for wrought material) and the alloy for die casting (alloy for casting) differ in composition (components and proportions of metal). Therefore, when tubular members, which are extruded metal materials, are joined by die-cast metal joining members, distortion occurs due to the difference in thermal expansion coefficient due to the difference in composition. Even if the distortion at each joint is small, when a large number of tubular members are joined to construct a large frame structure, the distortion becomes large, and there is a risk of unstable installation on the installation surface or rattling. There is

Therefore, the inventors of the present invention considered that a metallic joint member, which has higher mechanical strength and superior weather resistance than resin members, should be formed from a material having the same composition as that of the tubular member.

JP 2018-35906 A JP 2019-208564 A

Therefore, in view of the above-described circumstances, the present invention provides a method for manufacturing a joining member that can form a metal joining member for joining metal tubular members from a material having the same composition as that of the tubular member, and the method for producing the joining member. and a frame structure formed by joining tubular members with the joint member.

In order to solve the above problems, a method for manufacturing a joint member according to the present invention includes:
"A manufacturing method for forming a joining member through a cutting step of cutting a first extruded body and a second extruded body, which are metal extruded bodies, in a plane orthogonal to the Z direction, which is the extrusion direction,
As the extruded body,
a base that is a solid cuboid and has a hole penetrating in the Z direction;
In each of at least two of the four side surfaces parallel to the Z direction of the base, the X direction perpendicular to the Z direction or the Y Using the first extruded body having a single cross-sectional shape perpendicular to the Z direction, and a pair of first insert pieces extending in the Z direction,
The first extruded body is subjected to the cutting step to manufacture the first joining member.

Since the first joining member manufactured by this manufacturing method has two or more pairs of first insertion pieces extending in the X direction or the Y direction, the ends of the tubular member are attached to the pair of first insertion pieces. The tubular members can be joined by fitting them relative to each other. Since the first joining member is manufactured by cutting the extruded body along a plane orthogonal to the direction of extrusion, it can be made of a metal material having the same composition as the tubular member that is the extruded member. Therefore, by using the first joint member manufactured by this manufacturing method, it is possible to construct a frame structure that is free from distortion due to the difference in coefficient of thermal expansion.

In addition to the above configuration, the method for manufacturing a joint member according to the present invention includes:
"As the extruded body,
a rectangular plane portion parallel to the Z direction;
a protrusion extending perpendicularly from the planar portion at the center of the planar portion and extending in the Z direction;
A pair of second inserts extending perpendicularly from the planar portion along each of the pair of lateral sides extending in the Z direction on the surface of the planar portion opposite to the surface on which the protrusion extends. Using the second extruded body having a piece and having a single cross-sectional shape perpendicular to the Z direction,
After subjecting the second extruded body to the cutting step, the second joining member is manufactured by cutting off both ends of the protrusion so that the protrusion has a length that can be inserted into the hole. It is .

In this manufacturing method, the second joint member is manufactured in addition to the first joint member. By fitting the protrusion of the second joint member into the hole of the first joint member, the second joint member is moved in a direction orthogonal to the X direction or Y direction in which the first insertion piece of the first joint member extends. A second insert piece can be extended to fit and join the end of the tubular member. That is, by using both the first joint member and the second joint member, a three-dimensional frame structure can be constructed.

The second joint member is manufactured by cutting the extruded body along a plane orthogonal to the direction of extrusion, and then additionally performing a very simple cutting process. It is possible to form with Therefore, by using the second joint member manufactured by this manufacturing method in addition to the first joint member, a three-dimensional frame structure can be constructed without the risk of distortion due to the difference in thermal expansion coefficient. can do.

Next, the joining member according to the present invention is
" A joining member comprising a first joining member and a second joining member,
The first joining member is
a solid cuboid or cubic base having a hole extending therethrough in one direction;
On each of at least two side surfaces of the four side surfaces parallel to the Z direction, which is the through-hole direction of the hole of the base, inside the pair of side sides extending in the Z direction at a predetermined interval, the Z direction a pair of first insert pieces extending in the X direction or the Y direction perpendicular to the
The second joining member is
a square or rectangular flat surface;
a projecting portion extending perpendicularly from the flat portion at the center of the flat portion and having a length to be fitted into the hole;
a pair of second insert pieces extending perpendicularly from the flat portion along each of a pair of side edges on the surface of the flat portion opposite to the surface from which the protrusion extends; to do.

This is the configuration of the first joint member manufactured by the manufacturing method described above.

The framework structure according to the present invention is
"A frame structure constructed by joining rectangular tubular members with a first joining member and a second joining member,
The first joining member is
A solid rectangular parallelepiped or cube having a base having a hole penetrating in one direction, and at least two of the four side faces parallel to the Z direction, which is the penetrating direction of the hole of the base, on each of the Z a pair of first insertion pieces extending in the X direction or the Y direction perpendicular to the Z direction inside each of the pair of side sides extending in the direction at a predetermined distance;
The second joining member is
a square or rectangular flat surface,
a protrusion extending perpendicularly from the flat portion at the center of the flat portion to a length to be fitted into the hole;
A pair of second insert pieces extending perpendicularly from the flat portion are provided along a pair of side edges on the surface of the flat portion opposite to the surface from which the protrusion extends. ,
A pair of the first insertion pieces are fitted into the ends of the tubular members so that a plurality of the tubular members are joined by a plurality of the first joining members, thereby constructing a two-dimensional frame-like frame structure. has been
The tubular member having its ends fitted in the pair of second insertion pieces of the second joint member, the projections of which are fitted into the holes of the first joint member, is the two-dimensional frame. It is erected at a right angle to the frame structure.

This is a configuration of a three-dimensional frame structure constructed by joining tubular members using the first joint member and the second joint member manufactured by the above manufacturing method. Since all components can be manufactured by extrusion, all components can be made of metal of the same composition. This solves the problem that even a large frame structure constructed by joining a large number of tubular members is distorted due to the difference in coefficient of thermal expansion between the members. can be resolved.

In addition, since all the constituent elements can be made of metal of the same composition, there is no need for complicated work of sorting by material at the time of disposal.

The framework structure according to the present invention, in addition to the above configuration,
"While each of the pair of first insertion pieces and the pair of second insertion pieces includes a wedge holding portion for holding the wedge member between the paired counterpart,
The tubular member has a slit passing through one of the side surfaces in the thickness direction near the end,
The wedge member inserted into the slit is held by the wedge holder.

In this configuration, the wedge member is held between the pair of first insert pieces and between the pair of second insert pieces. As a result, when an external force acts on the tubular members respectively joined to the first joint member and the second joint member, the risk of the first insertion piece and the second insertion piece being distorted or buckled is reduced, and mechanical A frame structure with high strength can be constructed.

As described above, according to the present invention, there is provided a method for manufacturing a joining member that can form a metal joining member for joining metal tubular members from a material having the same composition as that of the tubular member. A manufactured joining member and a frame structure constructed by joining tubular members with the joining member can be provided.

(a) XY cross-section of an L-shaped first joint member, and (b) a diagram for explaining a method of manufacturing the L-shaped first joint member from the first extruded body. It is an XY cross section of the T-shaped first joining member. It is an XY cross section of the cross-shaped first joining member. (a) XY cross section of the wedge member, (b) the wedge member viewed from the direction facing the flat plate portion, and (c) a perspective view of the wedge member. (a) XY cross section of the second extruded body, (b) a view of the second joint member viewed from the protrusion side, and (c) a process of manufacturing the second joint member from the second extruded body. It is a figure explaining, (d) It is a perspective view of a 2nd joining member. (a) XY cross-sectional view of a third extruded body, (b) a view of the third joint member as seen from the protrusion side, and (c) a perspective view of the third joint member. FIG. 4 is an exploded perspective view illustrating construction of a two-dimensional frame-like framework structure; 1 is a partial perspective view of a two-dimensional frame-like frame structure; FIG. (a) is a cross-sectional view of the frame structure of FIG. 8 cut at the center in the height direction, and (b) is a cross-sectional view taken along line AA in FIG. FIG. 4 is an exploded perspective view illustrating construction of a three-dimensional frame structure; 1 is a partial perspective view of a three-dimensional framework structure; FIG. 1 is an exploded perspective view of a three-dimensional frame structure; FIG.

Hereinafter, a method for manufacturing a joint member according to an embodiment of the present invention, a plurality of types of joint members manufactured by this manufacturing method, and a frame structure constructed using these joint members will be described with reference to the drawings. to explain.

The frame structure of this embodiment is constructed by joining the tubular members 50 with joining members. The tubular member 50 is a square shape (square pipe) that is an extruded shape material, and has a square outer shape in a cross section orthogonal to the axial direction (hereinafter referred to as "orthogonal cross section"). Here, the length of one side of the square that is the outer shape of the orthogonal cross section is L, and the thickness of the tubular member 50 is d. Then, the length of one side of the square that is the inner shape of the orthogonal cross section in the tubular member 50 is L-2d.

The tubular member 50 is provided with slits 55 penetrating through one of the four side surfaces in the thickness direction near both ends (see FIG. 7). The slit 55 extends in a direction orthogonal to the axial direction of the tubular member 50 to a length that does not penetrate the side surface. Such a slit 55 is manufactured by perforating a tubular member that is an extruded material.

In this embodiment, a first joint member, a second joint member 40, and a third joint member 30 are used as joint members, and a wedge member 20 is used for reinforcement of joint.

In this embodiment, there are three types of first joint members, and when distinguishing between them, an L-shaped first joint member 1, a T-shaped first joint member 2, and a cross-shaped first joint member 3. and collectively referred to as the first joint member when there is no need to distinguish between them. Any type of first joining member is manufactured by a manufacturing method comprising an extrusion step of obtaining a metal extruded body and a cutting step of cutting the extruded body on a plane orthogonal to the extrusion direction. Here, the extrusion direction is referred to as the Z direction, and two directions perpendicular to the Z direction are referred to as the X direction and the Y direction. A plane perpendicular to the extrusion direction is the XY plane, and a cross section obtained by cutting the extruded body along the XY plane is referred to as an XY cross section.

The first extruded body, which is the base of the first joining member, is a solid rectangular parallelepiped having a base 10 having a hole penetrating in the extrusion direction (Z direction) and four side surfaces of the base 10 parallel to the Z direction. Each of at least two of the side faces has a pair of first insertion pieces 11 and 12 extending in the X direction or the Y direction inside a pair of side sides extending in the Z direction at a predetermined distance. . Since it is an extruded body, the shape of the cross section orthogonal to the extrusion direction, that is, the shape of the XY cross section is uniform over the entire length in the extrusion direction.

Of such first extruded bodies, a pair of first insert pieces 11 extend in the X direction from one of the four side surfaces parallel to the Z direction in the base 10, and the adjacent side surfaces By cutting the extruded body EB1 (see FIG. 1(b)) in which one or a pair of first insert pieces 12 extend in the Y direction, along the XY plane (the dashed line in FIG. 1(b)), An L-shaped first joint member 1 is manufactured.

Further, of the four side surfaces parallel to the Z direction in the base 10, a total of two pairs of first insertion pieces extend in one of the X direction and the Y direction from a pair of opposing side surfaces, and A pair of first insert pieces extending in the other of the X direction and the Y direction from one of the pair of side surfaces of the extruded body is cut in the XY plane to form a T-shaped second as shown in FIG. A joint member 2 is manufactured. Here, two pairs of first insertion pieces 11 extend in the X direction and a pair of first insertion pieces 12 extend in the Y direction.

Further, of the four side surfaces parallel to the Z direction in the base 10, a total of two pairs of first insertion pieces 11 extend in the X direction from a pair of opposing side surfaces, and the other pair of opposing side surfaces. By cutting the extruded body in which a total of two pairs of first insertion pieces 12 extend in the Y direction from the extruded body, the cross-shaped first joint member 3 is manufactured as shown in FIG. be.

In any type of first joint member, the pair of first insertion pieces 11 and 12 extend "within a predetermined space" from each of the pair of lateral sides extending in the Z direction of the base portion 10 . This “predetermined interval” is set substantially equal to the wall thickness d of the tubular member 50 . In addition, in this embodiment, a plurality of inclined protrusions 18 are formed on the outer surface of each of the pair of first insertion pieces 11 and 12 . In the XY cross section, the plurality of inclined projections 18 are connected so as to be inclined outward from the tip toward the base portion 10. In the Z direction, the inclined projections 18 extend over the entire length of each of the first insertion pieces 11 and 12. formed.

In any type of first joint member, the pair of first insertion pieces 11 and 12 are each provided with a wedge holding portion 14 for holding the wedge member 20 between the pair of mating members. Specifically, each of the first insertion pieces 11 and 12 has two small protrusions 13 protruding toward the paired mating member. The small projection 13 is formed over the entire length of each of the first insertion pieces 11 and 12 in the Z direction. The positions of these small projections 13 are set so that the small projections 13 provided on one of the paired insertion pieces and the small projections 13 provided on the other pair of the first insertion pieces 11 and 12 face each other. . These four small projections 13 form wedge holding portions 14 as gaps for inserting and holding the wedge member 20 between the pair of first insertion pieces 11 and between the pair of first insertion pieces 12. formed respectively. The distance from base 10 to the center of wedge holder 14 corresponds to the distance from the end of tubular member 50 to the center of slit 55 .

In any type of first joining member, the base 10 is a solid block with a square XY cross-sectional profile. The length of one side of this square is set substantially equal to the length L of one side of the square that is the outer shape of the orthogonal cross section of the tubular member 50 . Also, the length of the base portion 10 in the Z direction is set to be substantially equal to the length L−2d of one side of the square that is the inner shape of the orthogonal cross section of the tubular member 50 .

The hole penetrating the base 10 in the Z direction has the same length as the elongated hole 15 which extends a predetermined length without penetrating the base 10 in the X direction and the same length without penetrating the base 10 in the Y direction. It has a cross shape with the long hole 16 extending in the direction of the cross. The long holes 15 and 16 have the same width and length.

The wedge member 20 is manufactured by a manufacturing method including an extrusion step of obtaining a metal extruded body and a cutting step of cutting the extruded body along a plane perpendicular to the extrusion direction. The extruded body from which the wedge member 20 is based is composed of a rectangular flat plate portion 21 parallel to the Z direction and a head portion 25 provided along one of a pair of edge sides of the flat plate portion 21 parallel to the Z direction. and The wedge member 20 shown in FIG. 4 is manufactured by cutting such an extruded body along the XY plane. As shown in FIG. 4( a ), in the XY cross section of the wedge member 20 , the head portion 25 is formed to be thicker than the flat plate portion 21 . The thickness of the head 25 (the length in the X direction in FIG. 4A) corresponds to the width of the slit 55 in the tubular member 50, and the height of the head 25 (the length in FIGS. 4A and 4B) Y-direction length) corresponds to the wall thickness d of the tubular member 50 . The length of the wedge member 20 in the Z direction corresponds to the distance between the paired insertion pieces of the first insertion pieces 11 and 12, and the thickness of the flat plate portion 21 (in the X direction in FIG. 4A). length) corresponds to the distance between the two small protrusions 13 provided for each first insertion piece 11,12.

The first joint member and the wedge member 20 are final products by cutting the extruded body on the XY plane, while the second joint member 40 and the third joint member 30 are made by cutting the extruded body on the XY plane. Later, it is manufactured by applying some processing. That is, the second joint member 40 and the third joint member 30 are formed by an extrusion molding process for obtaining a metal extruded body, a cutting process for cutting the extruded body in a plane perpendicular to the extrusion direction, and a cut extruded body. and a cutting step of cutting a portion of the body.

As shown in FIG. 5(c), the second extruded body EB2, which is the base of the second joint member 40, has a rectangular flat portion 41 parallel to the Z direction and a flat portion 41 perpendicular to the flat portion 41 at the center of the flat portion 41. along each of a pair of side edges extending in the Z direction on the surface of the planar portion 41 opposite to the surface on which the projecting portion 45 extends and extending in the Z direction. , and a pair of second insert pieces 42 extending perpendicularly from the planar portion 41 .

The pair of second insertion pieces 42 has a plurality of inclined projections 48 on each outer surface. The slanted projection 48 is formed so as to be slanted outward from the tip toward the flat portion 41 in the XY section, similarly to the slanted projection 18 of the first joint member. The second insertion piece 42 has a wedge holding portion 44 for holding the wedge member 20 between the pair of mating members, like the first insertion pieces 11 and 12 of the first joining member. . The wedge holding portion 44 of the second joint member 40 is formed by a small projection 43 having the same configuration as the small projection 13 forming the wedge holding portion 14 on the first insertion pieces 11 and 12 .

The protrusion 45 in the second extruded body EB2 is a protrusion that has a rectangular shape in the XY cross section and extends over the entire length in the Z direction. The width length of the protrusion 45 (the length in the X direction in FIG. 5A) is set to a width length that is fitted into the long holes 15 and 16 of the first joining member. A plurality of minute inclined projections 46 are formed on two side surfaces of the protrusion 45 that are perpendicular to the plane portion 41 . These inclined projections 46 are formed so as to incline outward from the tips toward the flat portion 41 in the XY section, similarly to the inclined projections 48 .

Such a second extruded body EB2 is cut along the XY plane (chain line in FIG. 5(c)) in the cutting step. In the cutting step, the cut body 40p thus obtained is processed to cut off both ends 45r of the protrusion 45 (see FIG. 5B). The length of the excised portion is set so that the Z-direction length of the remaining protrusion 45 is the length that can be fitted into the long holes 15 and 16 of the first joining member.

Through such a cutting process, the second joint member 40 having the following configuration is manufactured. That is, the second joint member 40 has a square flat portion 41, and a projection extending perpendicularly from the flat portion 41 at the center of the flat portion 41 and having a length to be fitted into the long holes 15 and 16. 45, and a pair of second inserts extending perpendicularly from the flat portion 41 along each of the pair of side sides on the surface of the flat portion 41 opposite to the surface on which the projecting portion 45 extends. It is of construction with strips 42 . In the second joint member 40 having such a configuration, the length of one side of the square that is the outer shape of the flat portion 41 is slightly longer than the length of one side of the square that is the inner shape of the orthogonal cross section of the tubular member 50, L-2d. set small.

The third extruded body EB3, which is the base of the third joint member 30, has a rectangular second flat portion 31 parallel to the Z direction, and a rectangular second flat portion 31 extending perpendicularly from the second flat portion 31 at the center of the second flat portion 31. and a second protrusion 35 extending in the Z direction. The second projecting portion 35 has the same width and length as the projecting portion 45 of the second joint member 40 and has minute projections 36 similar to the minute projections 46 of the projecting portion 45 .

The cut body obtained by cutting the third extruded body EB3 along the XY plane in the cutting process is subjected to the cutting process. In this cutting step, similarly to the cutting step described above with regard to the manufacturing method of the second joint member 40, the length of the protrusion 35 in the Z direction is the length to be fitted into the long holes 15 and 16 of the first joint member. Processing is performed to cut off both ends of the protrusion 35 so that the protrusions 35 are formed as shown in FIG.

Through such a cutting process, the third joint member 30 having the following configuration is manufactured. That is, a square second plane portion 31 and a second plane portion 31 extending perpendicularly from the second plane portion 31 at the center of the second plane portion 31 and having a length to be fitted into the long holes 15 and 16 . It is a configuration provided with two protrusions 35 . In the third joint member 30 having such a configuration, the length of one side of the square, which is the outer shape of the second flat portion 31, is set to be substantially equal to the length of one side of the square, which is the outer shape of the orthogonal cross section of the tubular member 50. be done. Also, the thickness of the second plane portion 31 is set to be substantially equal to the thickness d of the tubular member 50 .

Next, construction of a frame structure using each member manufactured by the above manufacturing method will be described. A tubular member 50, a first joint member, a wedge member 20, and a third joint member 30 are used when constructing a two-dimensional frame-like framework structure. When the first joint members are used in the direction in which the Z direction, which is the extrusion direction, is the height direction, it is easy to perform the work of constructing the frame structure. As shown in FIG. 7, the tubular member 50 and the first joining member are joined together by inserting one pair of first insertion pieces 11 and 12 of the first joining member (here, the L-shaped first joining member 1) into a pair of first insertion pieces 11 and 12. This is done by fitting the ends of the tubular member 50 onto the outside. The first insertion pieces 11 and 12 are formed with inclined projections 18 , and the inclined projections 18 are inclined outward from the tips of the first insertion pieces 11 and 12 toward the base portion 10 . , 12 into the tubular member 50 relative to each other and prevents withdrawal of the tubular member 50 once it has been engaged.

Further, as described above, the pair of first insertion pieces 11 and 12 extends inwardly from each of the pair of side sides extending in the Z direction of the base portion 10 by the thickness d of the tubular member 50 . Therefore, when the tubular member 50 is fitted into the pair of first insertion pieces 11 and 12 from the outside, the side surface of the tubular member 50 and the side surface of the base portion 10 are flush with each other, as shown in FIG. 9(a). , the appearance is good.

After the tubular member 50 is fitted into the pair of first insertion pieces 11 and 12 , the wedge member 20 is inserted into the slit 55 formed near the end of the tubular member 50 . Since the wedge holding portion 14 and the slit 55 formed in the first insertion pieces 11 and 12 correspond to each other as described above, two pairs of small projections are formed as shown in FIG. 9(a). The flat plate portion 21 of the wedge member 20 is held in the wedge holding portion 14 which is the gap between the wedge members 13 . As described above, the height and width of the head portion 25 of the wedge member 20 correspond to the thickness of the tubular member 50 and the width of the slit 55, respectively. Then, the head portion 25 of the wedge member 20 is fitted into the slit 55 of the tubular member 50 . Therefore, when an external force acts on the tubular member 50 fitted in the first insertion pieces 11, 12 of the first joining member, the first insertion pieces 11, 12 may be distorted or buckled. 20 is prevented.

By the L-shaped first joining member 1, one tubular member 50 whose axial direction is the X direction and one tubular member 50 whose axial direction is the Y direction can be joined in an L shape. With the T-shaped first joining member 2, two tubular members 50 whose axial direction is the X direction and one tubular member 50 whose axial direction is the Y direction can be joined in a T shape. The cross-shaped first joining member 3 can join two tubular members 50 whose axial direction is the X direction and two tubular members 50 whose axial direction is the Y direction in a cross shape.

Since the first joint member is a member manufactured by cutting the first extruded body whose extrusion direction is in the Z direction along the XY plane, both end surfaces in the Z direction are inevitably formed into single pieces that do not have unevenness. becomes flat. Therefore, when the tubular member 50 is fitted from the outside into the first insertion pieces 11 and 12, which are the portions of the first joining member, the lower surface of the base 10 of the first joining member is inevitably pushed closer to the tubular member 50 than the lower surface of the tubular member 50. , and the upper surface of the base portion 10 of the first joint member is lower than the upper surface of the tubular member 50 by the thickness of the tubular member 50 . If the two-dimensional frame-shaped frame structure has such a step, there is a possibility that the installation on the installation surface may become unstable or rattling may occur.

Therefore, in order to eliminate such a step, the third joint member 30 is used in this embodiment. Specifically, the third joint member 30 is connected to the first joint member by fitting the second protrusion 35 of the third joint member 30 into the long hole 15 or the long hole 16 of the first joint member. When it is desired to eliminate the step on the lower surface of the base 10, the third joint member 30 is fitted into the elongated hole 15 or the elongated hole 16 from below the base 10. When it is desired to eliminate the step on the upper surface of the base 10, the third joint member 30 is fitted into the slot 15 or slot 16 from above the base 10 . Here, the case where the third joint member 30 is connected to the L-shaped first joint member 1 from both the lower side and the upper side of the base portion 10 is illustrated. An inclined projection 36 is formed on the second projecting portion 35, and the inclined projection 36 is inclined outward from the tip of the second projecting portion 35 toward the second plane portion 31, so that the long hole 15 or the long hole It guides the fitting of the second protrusion 35 into 16 and prevents the second protrusion 35 from being pulled out once fitted.

As described above, the thickness of the second flat portion 31 of the third joint member 30 is set substantially equal to the thickness d of the tubular member 50. Therefore, as shown in FIG. The bottom surface of the base 10 is flush with the bottom surface of the tubular member 50 and the top surface of the base 10 is flush with the top surface of the tubular member 50 . As a result, a two-dimensional frame-like frame structure can be constructed in which the upper surfaces of the constituent members are all on the same plane and the lower surfaces of the constituent members are all on the same plane.

When constructing a three-dimensional frame structure by further joining tubular members 50 perpendicular to the two-dimensional frame-like frame structure, a second The two joint members 40 are connected. Specifically, the projecting portion 45 of the second joint member 40 is fitted into the long hole 15 or the long hole 16 of the base portion 10 of the first joint member. As a result, as shown in FIG. 10, the pair of second insertion pieces 42 extend upward from the second joint member 40 . Therefore, the lower end of the tubular member 50 is fitted onto the pair of second insertion pieces 42 . The second insertion piece 42 is formed with an inclined projection 48 , and the inclined projection 48 is inclined outward from the tip of the second insertion piece 42 toward the flat portion 41 . The relative fit into 50 is guided and withdrawal of tubular member 50 once fitted is prevented.

After the tubular member 50 is fitted into the pair of second insertion pieces 42 , the wedge member 20 is inserted into the slit 55 formed near the end of the tubular member 50 . Since the second inserting piece 42 has a wedge holding portion 44 having the same configuration as the wedge holding portion 14 of the first inserting pieces 11, 12, the flat plate portion 21 of the wedge member 20 is held here. , the head 25 of the wedge member 20 is fitted into the slit 55 of the tubular member 50 . Accordingly, when an external force acts on the tubular member 50 fitted in the second insertion piece 42 of the second joining member 40, the wedge member 20 prevents the second insertion piece 42 from being distorted or buckled. prevented.

As described above, the square of the outer shape of the base 10 of the first joint member in the XY cross section is the same size as the square of the outer shape of the tubular member 50 in the orthogonal cross section. The square, which is the outer shape, is set slightly smaller than the square, which is the inner shape of the orthogonal cross section of the tubular member 50 . Therefore, the lower end of the tubular member 50 contacts the upper surface of the base portion 10 of the first joining member without the planar portion 41 interfering with the tubular member 50 . As a result, the side surface of the tubular member 50 erected with respect to the two-dimensional frame-like frame structure is on the same plane as the side surface of the base portion 10 of the first joint member, resulting in a good appearance.

The upper end of the tubular member 50 erected at a right angle to the two-dimensional frame-like frame structure is connected to the first joint member constituting another two-dimensional frame-like frame structure, and the second joint member 40 is also connected. can be connected via In this case, the second joint member 40 is connected from below the base portion 10 of the first joint member constituting another two-dimensional frame-like frame structure, and the pair of second insertion pieces 42 of the second joint member 40 is connected to the second joint member 40. The upper end of tubular member 50 is fitted. In this way, as illustrated in FIG. 12, a plurality of two-dimensional frame-like frame structures are connected by tubular members 50 via second joint members 40 to construct a three-dimensional frame structure. be able to.

The frame structure constructed in this way can be used for various purposes such as a frame, a frame of a temporary building or a greenhouse, a frame of a large signboard or a sign, a cart, and the like. Although the application is not particularly limited, it is suitable for applications that require high mechanical strength and high stability without distortion or rattling.

As described above, in the present embodiment, the first joint member (the L-shaped first joint member 1, the T-shaped first joint member 2, the cross-shaped first joint member 3), the second joint member 40, the All of the members used to join the tubular member 50, such as the three-joint member 30 and the wedge member 20, are manufactured by extrusion molding in the same manner as the tubular member 50. As shown in FIG. Therefore, all the constituent elements of the frame structure can be made of the same composition of metal material. For example, all of the components of the frame structure can be made of wrought aluminum alloy. As a result, it is possible to solve the problem that the frame structure is distorted due to the difference in coefficient of thermal expansion between members.

Further, when all the constituent elements of the framework structure are made of wrought aluminum alloy, it is possible to construct a framework structure that is extremely lightweight and has high mechanical strength.

Furthermore, conventionally, frame structures in which metal pipes are joined by resin joint members have been frequently used. rice field. On the other hand, in the present embodiment, all the constituent elements of the frame structure can be made of materials of the same composition, which eliminates the need for sorting work at the time of disposal, and further facilitates processing for recycling the materials. be.

In addition, in this embodiment, the frame structure is constructed by fitting members, and no screws or bolts are used. Therefore, electrolytic corrosion is effectively prevented.

In addition, since the frame structure is constructed by fitting the members, welding work is not required. Welding is very limited in the working environment, so it has the great advantage of not requiring welding work. Welding is not necessary for constructing the frame structure, but welding is not excluded. For example, after inserting the protrusion 45 of the second joint member 40 or the second protrusion 35 of the third joint member 30 into the elongated hole 15 or the elongated hole 16 of the first joint member, the periphery thereof may be welded. good.

As described above, the present invention has been described with reference to preferred embodiments, but the present invention is not limited to the above embodiments, and as shown below, various improvements can be made without departing from the scope of the present invention. and design changes are possible.

For example, in the above description, the outer shape of the tubular member 50 in the orthogonal cross section is a square, and the outer shape of the base 10 of the first joint member in the XY cross section is a square of the same size. In this case, there is an advantage that a single type of tubular member 50 can be used as the tubular member 50 to be joined in the X, Y and Z directions without considering its orientation. However, if the type of tubular member 50 is used differently depending on the direction of joining or the direction of joining is considered, the outer shape of the tubular member 50 in the orthogonal cross section and the outer shape of the base 10 of the first joining member in the XY cross section Even if is rectangular, it is possible to set the size and shape so that each side is on the same plane.

1 L-shaped first joint member (first joint member)
2 T-shaped first joint member (first joint member)
3 Cross-shaped first joint member (first joint member)
10 base 11 first insertion piece 12 first insertion piece 14 wedge holding portion 15 long hole (hole)
16 long hole (hole)
20 Wedge member 40 Second joining member 41 Flat portion 42 Second insertion piece 45 Protruding portion 50 Tubular member 55 Slit EB1 First extruded body EB2 Second extruded body

Claims (4)

A first joint member and a second joint member are formed through a cutting step in which the first extruded body and the second extruded body, which are metal extruded bodies, are cut along a plane orthogonal to the Z direction, which is the extrusion direction. A manufacturing method,
As the extruded body,
a base that is a solid cuboid and has a hole penetrating in the Z direction;
In each of at least two of the four side surfaces parallel to the Z direction of the base, the X direction perpendicular to the Z direction or the Y Using the first extruded body having a single cross-sectional shape perpendicular to the Z direction, and a pair of first insert pieces extending in the Z direction,
subjecting the first extruded body to the cutting step to produce the first joint member ;
As the extruded body,
a rectangular plane portion parallel to the Z direction;
a protrusion extending perpendicularly from the planar portion at the center of the planar portion and extending in the Z direction;
A pair of second inserts extending perpendicularly from the planar portion along each of the pair of lateral sides extending in the Z direction on the surface of the planar portion opposite to the surface on which the protrusion extends. Using the second extruded body having a piece and having a single cross-sectional shape perpendicular to the Z direction,
After subjecting the second extruded body to the cutting step, the second joint member is manufactured by cutting off both ends of the protrusion so that the protrusion has a length that can be inserted into the hole.
A method for manufacturing a joining member, characterized by: A joining member comprising a first joining member and a second joining member,
The first joining member is
a solid cuboid or cubic base having a hole extending therethrough in one direction;
On each of at least two side surfaces of the four side surfaces parallel to the Z direction, which is the through-hole direction of the hole of the base, inside the pair of side sides extending in the Z direction at a predetermined interval, the Z direction a pair of first insert pieces extending in the X direction or the Y direction perpendicular to the
The second joining member is
a square or rectangular flat surface;
a projecting portion extending perpendicularly from the flat portion at the center of the flat portion and having a length to be fitted into the hole ;
a pair of second insert pieces extending perpendicularly from the flat portion along each of a pair of side edges on the surface of the flat portion opposite to the surface from which the projecting portion extends ; have
A joining member characterized by: A frame structure constructed by joining rectangular tubular members with a first joining member and a second joining member,
The first joining member is
A solid rectangular parallelepiped or cubic base having a hole through it in one direction , and
On each of at least two side surfaces of the four side surfaces parallel to the Z direction, which is the through-hole direction of the hole of the base, inside the pair of side sides extending in the Z direction at a predetermined interval, the Z direction While comprising a pair of first insert pieces extending in the X direction or the Y direction, respectively, perpendicular to the
The second joining member is
a square or rectangular flat surface,
a protrusion extending perpendicularly from the flat portion at the center of the flat portion to a length to be fitted into the hole;
A pair of second insert pieces extending perpendicularly from the flat portion are provided along a pair of side edges on the surface of the flat portion opposite to the surface from which the protrusion extends. ,
A pair of the first insertion pieces are fitted into the ends of the tubular members so that a plurality of the tubular members are joined by a plurality of the first joining members, thereby constructing a two-dimensional frame-like frame structure. has been
The tubular member having its ends fitted in the pair of second insertion pieces of the second joint member, the projections of which are fitted into the holes of the first joint member, is the two-dimensional frame. shaped
Standing at a right angle to the frame structure
A framework structure characterized by: Each of the pair of first insertion pieces and the pair of second insertion pieces has a wedge holding portion for holding the wedge member between the paired counterpart,
The tubular member has a slit passing through one of the side surfaces in the thickness direction near the end,
The frame structure according to claim 3, wherein the wedge member inserted into the slit is held by the wedge holder .

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