JPH09256744A - Connection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To tightly connect two members with a simple structure without any gap. SOLUTION: The end of one member 1 is cut at 45 degrees, two circular screw insertion holes 5, 5 are provided in the neighborhood of the cut part of a base plate part 4 and an insertion groove is formed on the rear surface side of the base plate part 4. The end of the other member 2 is cut at 45 degrees as well as the member 1, two circular insertion holes 9, 9 are provided in the neighborhood of the cut part of the base plate part 8, and another insertion groove is formed on the rear surface side of the base plate part 8. A connecting fitting 3 is an L-shaped metal plate, and forms screw holes 12, 13, 14, 15 at four points. Both the ends of the connection fitting 3 are inserted in the insertion grooves from the ends which are cut at 45 degrees on the members 1, 2 respectively. And when the 45 degrees-cut faces of the members 1, 2 are matched to each other, only the screw hole 13 of the connection fitting 3 is biased to the cut face side for the screw insertion hole 5 nearer to the cut face of the member 1, and the centers of the other screw insertion holes and the screw hole 5 are substantially matched to each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting device for connecting two members at an angle of 90 degrees or in a straight line.

[0002]

2. Description of the Related Art Conventionally, there has been a coupling device in which a coupling tool is inserted into two members and a screw is screwed from a screw insertion hole of the member into a screw hole of the coupling tool to be fixed.

[0003]

In the above-mentioned conventional example, since the screw insertion hole of the member is made slightly larger than the outer diameter of the screw portion, the screw is screwed from the screw insertion hole into the screw hole of the coupling tool. Even though the members are stopped by friction, one member moves slightly with respect to the other member until the outer circumference of the threaded portion of the screw abuts the inner circumference of the screw insertion hole of the member. Therefore, there is a problem that a gap is created at the joint portion of both members.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention inserts a coupling tool into two members and fixes the coupling tool to each member to couple the two members. In the coupling device, at least one member has a substrate portion, a screw insertion hole is provided in the substrate portion, and the coupling member is provided with a screw hole at a position corresponding to the screw insertion hole of the one member. When the members are almost in contact with each other, the screw hole of the coupler is slightly offset to the joint surface side from the screw insertion hole of one member. The two members are joined together by screwing.

[0005]

[Function] When the flat head screw penetrates the screw insertion hole and is screwed into the screw hole, the conical slope of the seat surface of the flat head screw contacts one edge of the screw insertion hole, and when further tightened, the slope pushes the edge. The member of is moved to the joint surface side.

[0006]

EXAMPLE One member 1 is an extruded metal material having a cross-sectional shape as shown in FIG. 2, the end portion of which is cut at 45 degrees, and two circular screws near the cut portion of the substrate portion 4. Protrusions 6 that are provided with insertion holes 5 and face each other on the back surface side of the substrate portion 4
6 is provided to form an insertion groove 7.

The other member 2 has the same cross-sectional shape as the member 1 and has an end portion cut at 45 degrees like the member 1, and two circular screw insertion holes are provided in the vicinity of the cut portion of the substrate portion 8. 9 ・ 9
Are provided, and the ridges 10, 10 facing each other on the back surface side of the substrate portion 8 are provided.
Is provided to form the insertion groove 11.

The connecting member 3 is an L-shaped metal plate, and has screw holes 12, 13, 14, and 15 formed by cutting a screw thread at a portion formed by burring at four positions.

From the ends of the member 1 and the member 2 cut at 45 degrees, the ends of the coupler 3 are inserted into the respective insertion grooves 7 and 1
Insert into 1. Then, when the respective 45-degree cut surfaces of the member 1 and the member 2 are aligned, as shown in (A) of FIGS. 3 and 5, the members 1 and 2 are joined to the screw insertion hole 5 closer to the cut surface of the member 1. Only the screw hole 13 of the tool 3 is offset to the cutting surface side by the distance α, and the centers of the other screw insertion holes and the screw holes are substantially aligned.

The screw insertion holes 9 and 9 and the screw holes 14 and 15 are 2
The flat head screws 16 and 16 are inserted through the screw insertion holes 9 and 9 of the member 2 on the side that is matched with each other, and screwed into the screw holes 14 and 15 and tightened to fix the member 2 and the coupling tool 3. The fixing method of the coupling tool 3 on this side to the member 2 does not have to be flat head screws.

Next, a countersunk screw 16 is inserted through the screw insertion hole 5 on the side close to the cut surface, and screwed into the screw hole 13 slightly displaced and tightened. Then, the inclined surface of the lower surface of the head of the flat head screw 16 contacts the edge of the screw insertion hole 5 closer to the cut surface, and when further tightened, the inclined surface pushes the edge of the screw insertion hole 5 to move the member 1 to the joint surface side, The cut surface of the member 1 is in close contact with the cut surface of the member 2 without a gap. This state is illustrated in FIGS. 5A to 5C, that is, the members 1 and 2 are initially (A).
As shown in (B), when the countersunk screw 16 is tightened from the state in which it is separated by the gap dimension S, the gap gradually decreases and becomes in close contact as shown in (B) and (C). Lastly, in order to fix it more firmly, the screw insertion hole 5 farther from the cut surface
Then, a truss screw (not shown) is inserted, screwed into the screw hole 12, and tightened. Here, it is a flat head screw that uses a truss screw instead of a flat head screw, and if the screw insertion hole and the screw hole are misaligned, force is applied in the direction of separating the two members 1 and 2 that are in close contact with each other. May work, so it is better to use a flat head screw such as a truss screw here.

Incidentally, the countersunk screw 16 only needs to have a conical head seat surface, and naturally includes a round countersunk screw and the like.
Further, the members 1 and 2 are connected at a right angle, but the present invention is not limited to this, and the two members may be connected linearly, at an acute angle, or at an obtuse angle.

[0013]

As described above, according to the present invention, the screw hole is slightly offset with respect to the screw insertion hole, and the two members can be closely attached to each other with a simple structure without adding any parts. The effect is that they can be combined.

[Brief description of drawings]

FIG. 1 is a front view showing a state where the whole is disassembled.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a front view of a state where the whole is assembled.

FIG. 4 is a sectional view taken along line BB of FIG.

FIG. 5 is an enlarged cross-sectional view of a main part, including (A) and (B).
(C) shows the step of tightening the flat head screws.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 member 2 member 3 coupling tool 4 board part 5 screw insertion hole 13 screw hole 16 flat head screw

Claims (1)

[Claims] 1. A coupling device in which a coupling member is inserted into two members and the coupling member is fixed to each member to couple the two members, at least one member having a substrate portion and a screw on the substrate portion. An insertion hole is provided, and a screw hole is provided at a position corresponding to the screw insertion hole of the one member, and when the two members are almost in contact with each other, the screw hole of the connector has a screw hole of one member. A coupling device which is formed so as to be slightly offset from the screw insertion hole to the joint surface side, and which penetrates the screw insertion hole and screw a flat head screw into the screw hole to couple two members.