JP2001321856A - Method and apparatus for joining structural member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and an apparatus for joining a structural member which can prevent generation of the warp and dispense with a troublesome drilling work when structural members used in a building unit are joined with each other. SOLUTION: In the building unit formed by joining the joining members with the members to be joined which constituted a plurality of structural members, when the structural members 21, 22 consisting a floor among the structural members are joined with each other using a punch 4 and a die 5 by the caulking using the press, the joining condition is adjusted so that the total thickness after fastening the structural member is substantially one half of the sum of the thicknesses of the structural members before fastening them.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a housing, a building and the like, and more particularly to a method and an apparatus for joining structural members such as a building unit for joining a plurality of structural members.

[0002]

2. Description of the Related Art For example, a unit building is formed by transporting a building unit produced in a factory in advance to a building site and then joining a plurality of structural members, ie, a joining member and a member to be joined, horizontally and vertically. It has been known.

[0003] Generally, welding such as arc welding or spot welding is mainly used as a means for joining such metal parts. Further, Japanese Patent Application Laid-Open No. 7-000
No. 616, rivets, bolts, and the like using dry joining are also used.

[0004] Of the building units formed by joining in this way, for example, for a floor portion, height dimensional accuracy is important. In particular, when the floor portion is formed of a structural member, it is necessary to securely secure the positioning accuracy between the joining member and the member to be joined in joining in order to perform important dimensional control.

[0005]

However, in the case of forming a building unit, if the joint is welded, the structural member may be warped or applied to the surface of the structural member due to the heat generated during welding. The evaporated plating layer evaporates,
Later repairs may be required.

On the other hand, in the case of dry joining, there is no danger of such troubles occurring, so it is convenient in that respect. However, the use of rivets or bolts such as bolts increases the production cost accordingly. Leads to. In addition, in this case, it is necessary to make a preliminary hole in advance in accordance with the joint portion, but such a drilling operation involves difficulty.
Further, although not usually used in such a building unit, as a means for joining structural members, for example, a joining method by caulking is known. However, in the case of performing such a caulking connection, any one cannot be freely performed, and there are usually the following restrictions.
If the ratio of the plate thickness of the two structural members to be joined is 1: 3 or less, and the plate thickness of the caulked structural member changes greatly (for example, 2 mm or more), the punches and dies which are used for the caulking are used. Such a caulking device cannot be properly caulked unless the entire caulking device is replaced in its entirety according to its thickness.

In addition, in such welding and crimping, when the joining member is joined to the member to be joined, it is necessary to position and clamp the member to be joined, and therefore does not interfere with the caulking device or the welding device. It is necessary to install a jig for the clamp.

Accordingly, for example, in the case of caulking and joining, if the thickness or material of the structural member used for the building unit greatly changes depending on the building unit used, several types of caulking devices are prepared according to the size. Replacement is necessary, which is inefficient and unproductive, leading to increased costs.

As shown in FIG. 11, for example, as shown in FIG. 11, square punches 51 and dies 52 and round punches 61 and dies 6
There are two. For example, two upper and lower metal plates (hereinafter, upper plate 2
1 and the lower plate 22) are to be caulked and joined by a square-shaped one, for example, as shown in FIG.
As shown in (A), the rectangular punch 51 is pressed into the structural members 21 and 22 to be joined, and the two surfaces are sheared, and the plastic metal flowing from the upper plate 21 is hooked to the lower plate 22 from the sheared surface and fastened. It is made to let.

On the other hand, when caulking with a round shape, a round shape punch 61 is pushed into the metal plates 21 and 22 as shown in, for example, Japanese Patent Application Laid-Open No.
In (B), the metal is caused to flow plastically in the circumferential direction, and a hook portion of the upper plate 21 is formed on the lower plate 22 and fastened.

By the way, for example, a caulking device provided with such a rectangular punch 51 and a die 52 is strong against a rotational force along the plane portions of the structural members 21 and 22. In addition, since the structural members 21 and 22 are sheared and the upper plate 21 which is a metal plate on the punch side is plastically flown from the sheared surface, the upper plate 21 is joined to the lower plate 22 which is a structural member on the die side by joining. Upper plate 2 compared to the caulking device
1 metal is easy to flow. For this reason, when joining the same type of material and plate thickness, there is an effect that a slightly lower crimping pressure is required, which is convenient in this respect.

However, in such a caulking device, the shear strength at the joint is directional, and the shear strength in the direction perpendicular to the shear plane of the structural members 21 and 22 is high, but the shear strength in the parallel direction is high. The strength is not so high.

On the other hand, the caulking device provided with the round punch 61 and the die 62 is weak against the force in the rotational direction along the plane portions of the structural members 21 and 22, and the airtightness and the watertightness at the joints are reduced. Is inconvenient.

In view of the above-mentioned circumstances, the present invention can prevent the occurrence of warpage at the joint portion, and can reduce the size of the structural member used in the building unit or the like even when the thickness or the material of the structural member greatly changes. In addition, there is no need to prepare and replace several types of caulking devices, and there is no need to install jigs for clamping.Moreover, there is no directionality in the shear strength of the joints, and it is strong against rotational forces. ,
Further, it is an object of the present invention to provide a method and an apparatus for joining structural members such as a building unit having good airtightness and watertightness at a joint portion.

[0015]

According to a first aspect of the present invention, there is provided a method for joining structural members formed by joining a plurality of structural members. When forming by crimping bonding using a punch and a die, the bonding conditions are adjusted so that the plate thickness after fastening of the structural member is substantially half of the total thickness before fastening.

According to the first aspect of the present invention, when the structural members are joined by caulking, the thickness of the structural member after fastening is substantially half of the total thickness before fastening. The joining conditions are adjusted. For this reason, necessary and sufficient strength can be ensured without a decrease in strength.

As described above, since the structural members are joined by caulking, warpage due to heat does not occur at the time of joining, and it is possible to prevent occurrence of unevenness in joining at a floor portion or the like. Further, even in the case of joining of plated structural members, evaporation of the plating due to heat can be prevented, so that post-repair is not required.

According to the second aspect of the present invention, a punch having a size suitable for caulking in view of required strength and dimensions of a device is used as the punch, and the die has The present invention is characterized in that a member having a groove having a depth substantially half of the plate thickness of a structural member to be joined is used, and a caulking joint is performed to various structural members having different plate thicknesses and materials.

According to the method described above, the size of the punch and the depth of the die are formed with optimal dimensions in consideration of the thickness of the structural member used for bonding. Even when the thickness ratio of the structural member is 1: 3 or more, caulking can be performed.

Further, according to the third aspect,
The shear surface of the structural member sheared by the punch and die is
It is characterized by caulking so as to form a substantially cross shape that is orthogonal to each other.

According to the third aspect of the present invention, not only is the rotational force parallel to the joint surface of the structural member strong, but also the crimping force does not need to be so large, and the direction of the shear surface depends on the direction of the shear surface. In addition to high strength, water tightness and air tightness are completely guaranteed. For this reason,
In addition to the function of the above-mentioned claim 1 or 2, it is possible to block the intrusion of moisture or moisture that causes rust or mold from the outside, which is suitable as a method for joining structural members such as building units. is there.

Further, according to the fourth aspect of the present invention, the punch is pressed and sheared from the thick plate side of the two types of thick and thin plate-shaped structural members to be joined.
A method for joining structural members according to any one of the above aspects.

According to the fourth aspect of the present invention, the fastening force can be improved even when the same caulking device is used, and the entire caulking portion can be improved. Even when the plate thicknesses are significantly different, it is possible to securely caulk and join.

Further, according to a fifth aspect of the present invention, there is provided a joining device for joining a plurality of members using a caulking device having a punch and a die, wherein the caulking device includes a protrusion provided on the punch. And a groove provided in the die having a shape in which the sheared surfaces of the members to be sheared by these are formed in a cross shape orthogonal to each other.

According to the fifth aspect of the present invention, the projection provided on the punch of the caulking device and the groove provided on the die are formed by a shearing surface of a member to be sheared by these. Are joined so as to form a cross shape orthogonal to each other.

For this reason, the shear strength at the joint portion has no directionality, so that air-tightness and water-tightness at the joint portion can be ensured, which is convenient as a building unit or panel of a building unit, and is free from rust and mold. Generation can be prevented.

According to a sixth aspect of the present invention, there is provided a joining device for joining a plurality of members using a caulking device having a punch and a die, wherein the caulking device includes a receiving portion on the die side, It is characterized by a joining device formed so as to be movable in the radial direction.

According to the sixth aspect of the present invention, when the receiving portion on the die side of the caulking device moves in the radial direction at the time of caulking, the plastically flowing metal of the members to be joined is formed. The portion can be pushed and spread in the radial direction to create more catching portions with other members.

Further, according to a seventh aspect of the present invention, there is provided a joining device for joining a plurality of members using a caulking device having a punch and a die, wherein the joining member is joined to a stripper provided in the caulking device. The present invention is characterized by a joining device provided with a magnet for attracting a member.

According to the seventh aspect of the present invention, the positioning means and the clamp jig are not required separately.

[0031]

Embodiment 1 Hereinafter, a specific embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows an apparatus 1 for joining structural members of a building unit according to Embodiment 1 of the present invention.

In the structural member joining apparatus 1 for a building unit according to the first embodiment, the plurality of structural members 2 (the member 21 to be joined and the joining member 22) shown in FIG. 5 are joined by caulking. For this reason, a caulking device is used as the structural member joining device.

The caulking device shown in FIG. 1 has a configuration in which a punch 4 and a die 5 are provided on a base 3. The same device can caulk and join various kinds of plate thicknesses and materials. I can do it. It should be noted that the punch 4 and the die 5 used here are structural members 2 composed of a combination of structural members 21 and 22 having an average plate thickness.
The punch 4 and the die 5 having a size suitable for the joining are used.

That is, as the joining conditions, the size of the punch 4 is determined based on the required strength and the dimensions of the device, and the depth of the die 5 is set so as to be approximately の of the thickness of the structural member 2. Is used. The die 5 is not a fixed die but a movable die that can be expanded in the radial direction as shown in FIG. 5 so that the joining conditions can be adjusted. This is because, if it is a movable type, the metal part plastically flowed by the pressing force is more likely to flow in the lateral direction, so that the degree of freedom of the caulking pressurizing condition is improved and the plate of the structural member 2 for joining the depth of the die 5 This is because it is not necessary to change for each thickness.

Further, as shown in FIG. 2, the distance between the tip of the punch 4 and the bottom of the die 5 when the punch 4 and the die 5 are closest to each other during caulking is referred to as a "specific distance L" described later. To be. For example, the first embodiment
Then, the specific distance L is determined as follows.

That is, an experiment of strength evaluation was performed by changing the crimping pressure for each combination of the various structural members 2 to be joined, and (1) the relationship between the pressing force and the sheet thickness after crimping; (3) Determine the relationship between the three factors: pressing force and strength. The experimental results are shown in Table 1 below.

[0038]

[Table 1]

The strengths in the table are based on JIS Z313.
6, Z3137. Here, punch 4
Is tapered with a square □ 5 × 6mm dimension,
The die 5 also has a groove depth of 2.5 mm.
In addition, those which perform general shear caulking were selected, and an evaluation test was performed using the same.

In order to easily analyze and evaluate the results of this experiment, for example, for two types of structural members 2, a joining member 21 and a member to be joined 22, the plate thicknesses (lower plate, upper plate) are as follows. Kinds, ie, “A”: (1.6, 2.3), “B”: (1.6, 3.2), “C”: (1.6, 4.5) And (1) to (3) are correlated as shown in FIGS. 3A to 3C.

As a result, the pressurizing condition that maximizes the strength is found for each combination of the thicknesses, and the combination of the thicknesses that maximizes the strength at the lowest pressing force (A in FIG. 3A) ), And the sheet thickness dimension after crimping at that time is defined as “specific distance L”. Therefore, as can be seen from Table 1, the highest strength is obtained under the lowest pressurizing condition in the case of SS400, t2.3. In the first embodiment, when the thickness of the caulked portion after the caulking was measured under such conditions, data of 1.5 mm was obtained.

As a method for adjusting the distance between the tip of the punch 4 and the bottom of the die 5 to the "specific distance L", the installation position of the caulking pressurizing cylinder 6 in FIG. Alternatively, the adjustment may be made by sandwiching the spacer 62 between the rods 61. This allows
It can be adjusted so that the bottom dead center of the caulking pressurizing cylinder 6 is matched. Furthermore, the adjustment may be performed by providing a mechanical stopper in the caulking device.

With such a configuration, for example, FIG.
In the above, when caulking is performed with a metal plate thickness such as a combination “B” or “C”, the caulking bonding is performed with the combination “A” even if a pressing force is applied under the pressurizing condition that maximizes the strength of each combination. In this case, there is no caulking beyond the “specific distance L”, and the joint after caulking has an optimum thickness.

When caulking with a metal plate thickness such as a combination "B" or "C", it is desirable to set the optimum pressurization, but it is troublesome to change the pressurization condition, and the same pressurization condition is required. If it is desired to caulk, the optimum condition may be set based on the relationship between the pressing force of "B" and "C" and the strength. However, in this case, it is based on the required strength of the joint.

In the first embodiment, the stripper 7 is used, for example, as shown in FIG. 4, in order to position the member 22 to be joined and to clamp it at a predetermined position. The stripper 7 is used to easily pull out the punch 4 when the punch 4 is pushed into the joining member 21 at the time of caulking. Usually, a rubber ring such as urethane rubber is attached around the punch, or a plate with a spring is attached. And a structure using a bar. In the first embodiment, a plate 72 (or a bar) with a spring 71 is used as shown in FIG. According to the stripper 7, the punch 4
Is pressed into the member 22 to be joined, the spring 71 is compressed, and a reaction force for pulling out the punch 4 from the member 22 to be joined is generated.

In particular, in the first embodiment, the plate 72 provided as the stripper 7 is made of a magnet, and the member 22 to be joined is set on the plate 72 and gripped, so that a jig for positioning and clamping is provided. Can be eliminated.

Next, based on the relationship between the sheet thickness and the strength after the crimping, the sheet thickness after the crimping is determined by the combination of various kinds of materials and the sheet thickness so that the strength does not decrease so much. The crimping strength was set to 8.6 tons, and the crimping strength evaluation experiment was performed again.

Table 2 shows the results of the experiment.

[0049]

[Table 2]

As can be seen from Table 2, the sheet thickness after crimping becomes thinner with the stainless steel material, but since the “specific distance L” is secured, the sheet thickness at the joint after crimping is 1. 5m
It does not become smaller than m. As a result, sufficient strength can be ensured without causing a significant decrease in strength. When the plate thickness of the stainless steel material was 6.0 mm, the pressing force became insufficient, and the plate thickness after crimping was slightly thicker than the optimum plate thickness after crimping, but sufficient strength could be obtained. . Also, as a comparative example, the joining conditions when the round punch 4 is used with a fixed die are shown in Table 3 below.

[0051]

[Table 3]

In this comparative example, the first embodiment is used.
In order to facilitate comparison with the above, the diameter of the punch 4 was set to the same condition for all plate thicknesses and types of materials. In this case, there are three types of tools used for the crimping, namely, those having a die depth of 2 mm and a die diameter of φ8, those having a die depth of 3 mm and a die diameter of φ8, and a die depth of 3 mm. And a die diameter of φ10 are required.

As shown in FIG. 4, the stripper 7 used in the first embodiment is provided with a step S, and is positioned with the member 22 to be abutted against the step S. The to-be-joined member 22 can be gripped and positioned by a magnet, for example, a permanent magnet embedded in the abutting surface of the stripper 7 with the to-be-joined member 22. In addition,
As this magnet, an electromagnet may be used instead of a permanent magnet. Thereby, what usually has four operation steps of work setting, work positioning, and fastening can perform the caulking work in two steps of setting and fastening the work to the stripper. Therefore, the working process can be simplified.

Next, a method for joining the structural members 2 using the structural member joining apparatus 1 for a building unit according to the first embodiment of the present invention will be described.

In FIG. 5, two plate-like structural members 2 of a joining member 21 and a member to be joined 22 are used to caulk and join them, but the joining member 2 on the punch 4 side is used.
For 1, a member having a larger plate thickness than the member 22 to be joined is used. As described above, the reason why the thin plate is not used as the structural member on the punch 4 side is that when the punch is pushed in from the thin plate side,
This is because if the plate thickness ratio is large, the thin plate side is too narrowed, so that caulking is impossible. (1) First, in FIG. 5, the positional relationship is such that the punch 4 is pushed from the thick plate (joining member 21) side.
A movable punch 4 is attached to the caulking device (spot clinch).
And a die 5, and two plate-shaped structural members 2, that is, a workpiece 21 and a bonding member 22, which are works, are set therebetween. In this case, the distance between the tip of the punch 4 and the bottom of the die 5 is adjusted to be a predetermined “specific distance L”.

In the case of the building unit according to the present invention, as shown in FIGS. 6 and 7, for example, a floor beam 21A is provided on the side of the joining member 21 which is a thick plate, and a member 22 to be joined which is a thin plate. A girder beam 22A corresponds to the side. The thickness ratio of the two plate-like structural members 2 of the joining member 21 and the small beam 21A and the girder beam 22A, which are the members 22 to be joined, is 1:
Even three or more can be caulked. (2) Next, the member to be joined 22 is set on the plate 72 provided with the magnet of the stripper 7, and is gripped by magnetic force. This usually eliminates the need for the necessary positioning and clamping. (3) After that, when the caulking device is operated under the optimal pressurizing condition, caulking is performed at the joint portion set between the punch 4 and the die 5. After the caulking is performed, the punch 4 is pulled out by a spring 71 provided on the stripper 7.

[0057]

[Embodiment 2] Next, an apparatus for joining structural members of a building unit according to Embodiment 2 of the present invention will be described. In the second embodiment, the same or equivalent parts as those in the first embodiment are denoted by the same reference numerals, and the description is omitted.

As shown in FIG. 8, a cross-shaped punch 8 and a die 9 according to the second embodiment are used, and a cross-shaped caulked portion shown in FIG. 9 is formed.

That is, in the punch 8 according to the second embodiment, each outer end of the cross-shaped projection 81 is chamfered. On the other hand, as shown in FIGS. 8 and 10, a cross-shaped groove 91 is formed in the die 9, and a center-side end of a convex receiving portion 92 surrounding the groove 91 is chamfered. 93 is given. As shown in FIG. 10, a rubber ring 94 for moving the receiving portion 92 is provided on the receiving portion 92 of the die 9 in the circumferential direction of the die 9.
Before caulking, the receiving part 92 is diced by the rubber ring 94.
It is pressed against the center side.

Next, a structural member 2 using the structural member joining apparatus 10 for a building unit according to the second embodiment of the present invention will be described.
Will be described. (1) As shown in FIG. 9, a crimping device (pressing device) set with the cross-shaped punch 8 and the dice 9 aligned in the direction of the cross and with the center axis also aligned. Then, the joining member 21 and the member to be joined 22, which are works, are set. At this time, the member to be joined 22 is in contact with the upper surface of the receiving portion 92 of the die 9, and is pressed against the receiving portion 92 toward the center of the die 9 by a rubber ring 94. (2) When the pressing force is applied to push the punch 8 into the member 22 to be joined, as shown in FIG. The to-be-joined member 22 is washed away by 9.
Then, when the die 9 is pushed in only to the depth of the groove 91 (up to the bottom surface portion), a shear surface is formed. This is because the depth dimension of the groove 91 of the die 9 is equal to the member 22 (lower plate) to be joined.
Because it is larger than. (3) Further, a pressing force is applied, and the joining member 21 sandwiched between the punch 8 and the die 9 is compressed, and the crushed metal portion tends to flow in the thickness direction of the member 22 to be joined. (4) Since the metal portion of the crushed joining member 21 (upper plate) expands from the chamfered portion of the die 9 and there is a gap for the chamfer, the metal flows plastically preferentially from this portion. Then, the metal part of the joining member 21 (upper plate) that flows plastically spreads in the radial direction, and the joining member 2
2 (lower plate) is caught. (5) At this time, the member to be joined 22 that is in contact with the receiving portion 92 of the die 9 is pushed and spread by the plastic flow of the metal, so that more caught portions can be obtained. Note that, in the second embodiment, t
4.5 and t1.6 and t3.2 and t1.6. Table 4 shows the relationship between the joining conditions when performing the caulking joining and the fastening strength. Here, the upper plate refers to the joining member 21 on the punch 8 side, and the lower plate refers to the joined member 22 on the die 9 side.

[0061]

[Table 4]

In this case, the shear strength in the table is determined by JI in two orthogonal directions similar to caulking of a conventional rectangular punch.
The measurement was performed based on SZ3136 and Z3137, but there was no difference in the fastening strength between these two directions. As described above, according to the second embodiment, it is possible to realize shear crimping with no directionality in strength, and to perform high-strength fastening with a low pressing force.

Further, according to the second embodiment, the effect that the fastening strength in the rotational direction is stronger than that of the normal caulking connection can be obtained, and the positioning means and the clamp jig are not separately required. .

Furthermore, according to the second embodiment, the shear strength at the joint portion has no directionality, and the air-tightness and water-tightness at the joint portion can be ensured in a favorable state. An effect of preventing the generation of rust and mold can be provided.

Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and design changes can be made without departing from the spirit of the invention. For example, it may be applied to a building panel or the like instead of the unit building.

[0066]

As described above, according to the first aspect of the present invention, when the structural members are joined by caulking, the thickness of the structural member after fastening is substantially equal to the sum of the thicknesses before fastening. The joining conditions are adjusted to be half. For this reason,
A necessary and sufficient strength can be secured without a decrease in strength.

As described above, since the structural members are joined by caulking, warpage due to heat does not occur at the time of joining, and it is possible to prevent occurrence of unevenness in joining at a floor portion or the like. Further, even in the case of joining of plated structural members, evaporation of the plating due to heat can be prevented, so that post-repair is not required.

In the second aspect of the present invention, the size of the punch and the depth of the die are formed to have an optimum size in consideration of the thickness of the structural member used for the bonding. Even when the thickness ratio of the two structural members is 1: 3 or more, caulking can be performed.

In the third aspect,
In addition to the strong rotational force parallel to the joint surface of the structural member, the crimping force does not need to be so large, and a large strength can be obtained irrespective of the direction of the shear surface. Is done. For this reason, in addition to the effect of the above-mentioned claim 1, it is possible to block the intrusion of humidity or moisture, which causes rust or mold, from the outside, and as a method of joining structural members of a building unit. It is suitable.

Further, according to the fourth aspect, even when the same caulking device is used, the fastening force can be improved, and the entire thickness of the caulked portion can be improved. However, even in the case of a large difference, it is possible to securely caulk and join.

Further, according to the fifth aspect of the present invention, the protrusion provided on the punch of the caulking device and the groove provided on the die have a shear surface of a member to be sheared by them. Join so as to form a cross shape that is orthogonal to each other.

For this reason, the shear strength at the joint portion has no directionality, and air-tightness and water-tightness at the joint portion can be ensured. This is convenient as a building unit or panel for construction, and the generation of rust and mold is prevented. Can be prevented.

According to the sixth aspect of the present invention, when the receiving portion on the die side of the caulking device is moved in the radial direction at the time of caulking, the metal part of the member to be joined that is plastically flowed is removed. It is pushed and spread in the radial direction,
It is possible to generate more portions that are caught by other members.

Further, according to the seventh aspect, there is provided a practically useful effect that a positioning means and a clamp jig are not separately required.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a configuration of a main part in a structural member joining apparatus for a building unit according to a first embodiment of the present invention.

FIG. 2 is an explanatory view showing an attachment positional relationship between a punch and a die in the structural member joining apparatus according to the first embodiment.

FIG. 3 shows a relationship between a crimping force, strength, and a sheet thickness after crimping when a combination of structural members having various thicknesses is used. Board thickness,
(B) is a correlation diagram between the sheet thickness after crimping and the pressing force, and (C) is a correlation diagram between the crimping pressure and the strength.

FIG. 4 is a perspective view showing a stripper and the like used for a caulking device which is a structural member joining device according to the first embodiment.

FIGS. 5A, 5B, and 5C are process diagrams showing a caulking method using a caulking device as the structural member joining device according to the first embodiment.

FIG. 6 is an explanatory diagram when the caulking device according to the first embodiment is applied to a building unit.

FIG. 7 is a side view showing an attached state of the caulking device according to the first embodiment.

FIG. 8 is a perspective view showing a caulking device which is a structural member joining device for a building unit according to Embodiment 2 of the present invention.

FIG. 9 is a perspective view showing a caulked portion by a caulking device which is a structural member joining device according to the second embodiment.

FIG. 10 is a sectional view showing a die of the caulking device according to the second embodiment.

FIG. 11A is a perspective view showing a conventional rectangular punch and die, and FIG. 11B is a perspective view showing a conventional rectangular punch and die.

12A is a perspective view showing a state in which a structural member is caulked by a conventional rectangular punch and a die, and FIG. 12B is a perspective view showing a state in which a structural member is caulked by a conventional round punch and a die. It is.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Structural member joining apparatus 2 Structural member 21 Member to be joined (upper plate) 22 Joining member (lower plate) 3 Base 4 Punch 5 Dice 6 Caulking pressure cylinder 61 Rod 62 Spacer 7 Stripper 71 Spring 72 Plate 8 Punch 81 Projection 82 Chamfer 9 Die 91 Groove 92 Receiving part 93 Chamfer 94 Rubber ring

Claims (7)

[Claims] 1. A method for joining structural members formed by joining a plurality of structural members, wherein the joining of the structural members is performed by caulking by pressing using a punch and a die. A method for joining structural members, wherein the joining conditions are adjusted so that the thickness of the sheet is substantially half of the total thickness before fastening. 2. A punch having a size suitable for caulking according to required strength and dimensions of an apparatus is used for the punch, and the die is provided with approximately half the thickness of a structural member to be joined. The structural member joining method according to claim 1, wherein a member having a groove having a depth of the following is used, and a caulking joint is performed to various structural members having different plate thicknesses and materials. 3. The method for joining structural members according to claim 1, wherein the shearing surfaces of the structural members sheared by the punch and the die are caulked so as to have a substantially cross shape orthogonal to each other. 4. The punch according to claim 1, wherein the punch is pressed and sheared from the thick plate side of the two types of thick and thin plate-shaped structural members to be joined. Structural member joining method. 5. A joining device for joining a plurality of members using a caulking device having a punch and a die, wherein the caulking device includes a projection provided on the punch and a groove provided on the die. A joining device characterized in that the members to be sheared by these have a cross-shaped cross section orthogonal to each other. 6. A joining apparatus for joining a plurality of members using a caulking device having a punch and a die, wherein the caulking device is configured such that a receiving portion on a die side is formed to be movable in a radial direction. Characteristic joining equipment. 7. A joining apparatus for joining a plurality of members using a caulking device having a punch and a die, wherein a stripper provided in the caulking device includes a magnet for attracting the members to be joined. A joining device characterized by the above-mentioned.