JPH03199704A - Member connecting structure - Google Patents

Abstract

PURPOSE:To contrive sure connection for a long period through a simple work by forming a cavity by means of paired side walls and connection walls in the first member and also forming the first and second tapered surfaces on the connection walls and providing tapered surfaces, closely stuck and floating- fitted to both first and second tapered surfaces, in the insertion lever of the second member to be inserted in the cavity, so as to connect the lever by screws. CONSTITUTION:A cavity S and the first and second tapered surfaces 14,15 are formed in the interior of a strut 11 by paired side walls 11 and connection walls 12,13 and a screw insertion hole is formed in the connection wall 12. On the other hand, a relay member 2 is formed by a main unit 21 of outer edge shape equal to the strut 1 and an insertion lever 22 inserted into the cavity S, and a tapered surface 23 parallelly approaching the first tapered surface 14 through a fine clearance, tapered surface 24 closely attached to the second tapered surface 15 and a thread hole 25 opposed to the connection wall 12 are provided on the insertion lever 22. Accordingly, sure connection can be held for a long period by a simple work without deteriorating external appearance.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a member joining structure that is widely applied when a pipe-shaped member and another member are joined using bolts.

[Prior Art] For example, the following structure is known as a structure in which a pipe-shaped member and another member are connected using bolts. First, a bolt insertion hole is bored in the vicinity of the end of the pipe-shaped member, and an insertion rod is provided protruding from the end face of the other member to be inserted into the cavity of the pipe-shaped member. A screw hole is provided in a portion corresponding to the bolt insertion hole. and inserting the insertion rod into the cavity,
The bolt passed through the bolt insertion hole is screwed into the threaded hole of the insertion rod, and the two members are connected by tightening the bolt.

[Problems to be Solved by the Invention] By the way, with such a structure, a part of the outer surface of the insertion rod is brought into close contact with a part of the inner surface of the pipe-shaped member due to the tightening force of the bolt, and the surface friction causes , both members will be joined.

However, in such a connected state, when repeated loads are applied between both members, surface slippage occurs and the bolts tend to loosen. Therefore, there is a problem in that it is difficult to maintain a strong bonded state without rattling over a long period of time.

The present invention aims to eliminate such problems.

[Means for Solving the Problems] In order to achieve the above objects, the present invention takes the following measures.

That is, in the member joining structure according to the present invention, a first member and a second member are joined using bolts, and the first member has a pair of side walls, It is a pipe-shaped pipe that has a cavity formed inside by a pair of connecting walls that connect these side walls. forming a first inwardly tapered surface that opens, and a second inwardly tapered surface that expands toward the other joint wall on the inner side of the both side walls near the other joint wall; The second member includes an insertion rod that is inserted into the cavity of the first member, and the insertion rod includes:
a first outwardly tapered surface that is parallel to and close to the first inwardly tapered surface through a small gap; a second outwardly tapered surface that is in close contact with the second inwardly tapered surface; The bolt is passed through the one joint wall and screwed into the screw hole of the insertion rod, and the bolt directs the insertion rod in the direction of the one joint wall. The first outwardly tapered surface is also brought into close contact with the first inwardly tapered surface by pulling the first outwardly tapered surface.

When inserting the second outwardly tapered surface between the second inwardly tapered surfaces, if you want to ensure that the sidewalls deform smoothly and that the deformation is not noticeable from the outside, It is best to curve the center part so that it bulges outward.

In order to prevent the bolts from being exposed to the outside, the edges of both side walls should extend outward beyond the first joining wall, and a cover should be installed between the extending edges of the side walls. Bye.

In order to simplify manufacturing, it is desirable to manufacture the first member by extrusion molding.

[Operation] With such a configuration, the insertion rod can be inserted into the cavity of the first member while a gap is formed between the first inwardly tapered surface and the first outwardly tapered surface. Therefore, there is no difficulty in assembling members with high fitting precision, and the first member and the second member can be easily assembled in the posture in which they should be joined. In this state, when the bolt is passed through one joint wall and screwed into the threaded hole of the insertion rod, and the bolt is tightened, the insertion rod is pulled toward the one joint wall, and the second outward taper tapers. The surface becomes wedge-shaped between the second inwardly tapered surfaces. That is, in this case, while deforming both walls outward, the second outwardly tapered surface bites into the space between the second inwardly tapered surfaces, and the insertion rod moves in the direction of one joint wall while increasing the surface pressure. will be moved to. As a result, the first outwardly tapered surface abuts the first inwardly tapered surface,
The two tapered surfaces are also in close contact. Therefore, the first member and the second member are connected via the two tapered fitting portions, and are strongly connected with no play. In this connected state, the elastic repulsive force of the members acts to strengthen the surface pressure between the tapered surfaces and to increase the friction between the bolt and the screw hole, so that the bolt is less likely to loosen.

[Example] Hereinafter, embodiments of this invention will be described with reference to the drawings.

Example 1 (Figures 1 to 3) In this example, as shown in Figure 1, a branch 1, which is a first member, and a relay member 2, which is a second member, are glued together. It is.

As shown in FIGS. 2 and 3, the branch office 1 is a pipe in which a cavity S is formed inside by a pair of side walls 11 and a pair of connecting walls 12 and 13 that connect these side walls 11. It is made of aluminum or other material by extrusion molding.

A first inwardly tapered surface 14 that widens toward the other joining wall 13 is formed on the inner side of the both side walls 11 near one of the joining walls 12 .

Also, the other connecting wall 13 inside the both side walls 11
A second inwardly tapered surface 15 that widens toward the other joining wall 13 is provided at the closer portion. The expansion angle of the second inwardly tapered surface 15 is set to be smaller than the expansion angle of the first inwardly tapered surface. The both side walls 11 are flat-faced so that the central portion bulges outward, and the edges 11a of the both side walls 11 extend further outward than one of the joining walls 1. 11 extending edge 11a
A cover 16 made of synthetic resin can be removably attached in between.

The relay member 2 includes a main body 21 having the same outer edge shape as the support 1, and an insertion rod 22 that projects from the end surface of the main body 21 and is inserted into the cavity S of the support 1. 22, a first outward tapered surface 23 that is parallel and close to the first inward tapered surface 14 with a small gap C therebetween, and a second outward tapered surface 24 that is in close contact with the second inward tapered surface 15. and a screw hole 25 facing the one coupling wall 12.

The main body 21 of the relay member 2 has the insertion rods 22 protruding from both end surfaces 21a, and each of the insertion rods 22
are respectively connected to upper and lower branches 1 having the same cross-sectional shape using bolts 3. That is, two bolts 3 are passed through one joint wall 12 of each support column 1 at a required interval, and each bolt is screwed into a screw hole 25 provided in the insertion rod 22. There is.

In this state, each bolt 3 is tightened by pulling the insertion rod 22 in the direction of one of the connecting walls 12, thereby converting the first outwardly tapered surface 23 into the first inwardly tapered surface 14. It is closely attached to.

With this kind of configuration, as shown in Figure 2,
First inwardly tapered surface 14 and first outwardly tapered surface 2
Since the insertion rod 22 can be inserted into the cavity S of the support column 1 while a gap is formed between the insertion rod 22 and the support rod 3, there is no difficulty in assembling members with high fitting precision, and the insertion rod 22 can be easily inserted. The support column 1 and the relay member 2 can be combined in a posture in which they should be combined. In this state, when the bolt 3 is passed through one of the connecting walls 12 and screwed into the screw hole 25 of the insertion rod 22, and the bolt 3 is tightened, the insertion rod 22 is pulled in the direction of one of the connecting walls 12. , the second outwardly tapered surface 24 wedges between the second inwardly tapered surfaces 15. That is, in this case, both side walls 11
while deforming the second outwardly tapered surface 24 outwardly.
As a result, the insertion rod 22 moves in the direction of one of the connecting walls 12 while increasing the surface pressure. As a result, as shown in FIG. 3, the first outwardly tapered surface 23 comes into contact with the first inwardly tapered surface 14, and the two tapered surfaces 14, 23 are also in close contact. Therefore, the support column 1 and the relay member 2 are connected through the two tapered fitting portions, and are strongly connected with no play. therefore,
It becomes possible to firmly connect both the upper and lower supports 1 via the relay member 2 without rattling.

Embodiment 2 (FIG. 4, Prisoner 5) In this embodiment, the leg support 1 (first member) and top plate 4 of desk A are
This is a case in which the present invention is applied to a joint portion with a corner member 51 (second member) of a frame 5 that supports the frame 5.

As shown in FIG. 4, this desk A has a frame 5 supported by four leg supports 1, and a top plate 4 mounted on this frame 5.

The leg strut 1 has the same configuration as the strut 1 of Example 1,
Identical parts are given the same reference numerals and explanations will be omitted.

The frame 5 includes a corner member 51 and a straight pipe member 5.
It is a frame-shaped thing made by joining two parts together, and is made of aluminum or the like. As shown in FIG. 5, the corner member 51 includes a pair of pipe joints 51a that are flush with the straight pipe members 52 assembled in an orthogonal state, and a leg that is flush with the leg support 1. The joint part 51b is integrally molded, and the lower surface of the leg joint part 51b has a
An insertion rod 22 that is exactly the same as the insertion rod 22 of the first embodiment is provided in a protruding manner. Regarding this insertion rod 22, the same parts as in the first embodiment are given the same reference numerals, and the description thereof will be omitted.

With such a configuration, the insertion rod 22 of the corner member 51 is inserted into the cavity S of the leg support 1, and the leg support 1 is tightened using the bolt 3 as in the first embodiment. can be strongly connected to the corner member 51 of the frame 5.

It should be noted that the present invention is not limited to the embodiments described above, and it goes without saying that the present invention can also be applied to the joining of various horizontally arranged structural members.

[Effects of the Invention] Since the present invention has the above-described configuration, the insertion rod of the second member is inserted into the cavity of the first member with sufficient dimension, and then the bolt is tightened. By applying the operation, it is possible to bring the first inward tapered surface and the first outward taper into close contact while strongly pressing the second inwardly tapered surface against the second outwardly tapered surface. The insertion rod can be reliably fixed within the cavity by the engagement structure. Therefore, the first member can be firmly joined to the second member without rattling by a simple operation, and the joined state can be maintained for a long period of time.

Furthermore, if both side walls are flattened so that the center part bulges outward, the side walls can be smoothly deformed when the second outwardly tapered surface is inserted between the second inwardly tapered surfaces. Moreover, the deformation will not be noticeable from the outside. In other words, if the side wall is flat or has a concave center, the bulge will easily affect the appearance when the side wall is deformed outward.
If the side plate is originally bulged, even if the side plate is slightly deformed in the direction of the bulge, the appearance will hardly be affected and the deformation will be natural.

Furthermore, if the edges of both side walls extend outward beyond one of the joining walls and a cover is installed between the extending edges of the side walls, bolts can be prevented from being exposed to the outside. be able to. Note that if the side plates are curved as described above, their edges will approach each other on the tip side, so it is possible to engage and hold the cover in a removable manner without providing any special undercuts. This allows the structure of the cover holding part to be simplified.

[Brief explanation of drawings]

1 to 3 show one embodiment of the present invention, FIG. 1 is a perspective view showing the state before joining, FIG. 2 is a cross-sectional view showing the state where the insertion rod is inserted into the cavity, and FIG. The figure is a cross-sectional view showing the final bonded state. FIG. 4 is an overall perspective view showing another embodiment of the present invention, and FIG. 5 is a perspective view showing essential parts of the same embodiment. 1... First member (pillar, leg support) 2... Second member (relay member, corner member) 3...
・Bolt 11...Side wall 1a...Edge
12... One coupling wall 3... Other coupling wall 4... First inwardly tapered surface 5... Second inwardly tapered surface 6... Cover 22... Insertion rod 3...・First
Outwardly tapered surface 4...Second outwardly tapered surface 5...Screw hole C...Gap...Space

Claims (1)

[Claims] 1. A member joining structure comprising a first member, a second member, and a bolt, wherein the first member includes a pair of side walls and both side walls thereof. It is a pipe-shaped pipe with a cavity formed inside by a pair of connecting walls that connect the two walls, and a hole that expands toward the other connecting wall is located on the inside of the side walls near one of the connecting walls. a second inwardly tapered surface that widens toward the other connecting wall is provided on a portion of the inner side of the both side walls closer to the other connecting wall; The member includes an insertion rod that is inserted into a cavity of the first member, and a first outward taper that is parallel to and adjacent to the first inward taper surface through a small gap. a second outwardly tapered surface that is in close contact with the second inwardly tapered surface, and a screw hole that faces the one coupling wall, and the bolt is inserted through the one coupling wall. It is screwed into the screw hole of the insertion rod, and by pulling the insertion rod toward one of the connecting walls with this bolt,
A member joining structure characterized in that the first outwardly tapered surface is also brought into close contact with the first inwardly tapered surface. 2. The member joining structure according to claim 1, wherein both side walls are curved so that the central portion bulges outward. 3. The member according to claim 2, characterized in that the edges of both side walls extend outward beyond the first joint wall, and a cover is attached between the extending edges of the side walls. bond structure. 4. The member joining structure according to claim 1, wherein the first member is made by extrusion molding.