JPH0571515A - Coupling structure - Google Patents

Abstract

PURPOSE:To facilitate the positioning of a tap plate used for coupling members in a coupling structure. CONSTITUTION:A tap plate 14 is provided in a dove tail groove 13 formed in a support column 13, and a compression coil spring 21 is attached at one end to a projection 15 having a screw hole and formed on a tap plate 14. The tap plate 14 is pressed against the inner surface of the dove tail groove 13 by the resilient force of the compression coil spring 21. Accordingly, even though the dove tail groove 13 is vertically formed, the tap plate 14 is surely positioned without slipping down. Thereafter, an attaching bolt 24 is engaged in a cross member 4 and is then screwed into the screw hole in the tap plate 14 so that the cross member 4 is coupled to the support column 3 through the intermediary of the bolt 24 and the tap plate 14. The projection 16 on the tap plate 13 may be formed by burring so as to eliminate the necessity of welding or grinding.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting structure in which a cross member is connected to a support, for example.

[0002]

2. Description of the Related Art Conventionally, as a connecting structure of this type, there is one disclosed in Japanese Utility Model Publication No. 1-35058. That is,
A nut body is inserted into a ripped channel steel, and a connecting protrusion having a circular cross section is provided on the back surface of the nut body. From the plate thickness direction of the nut body, a screw hole that penetrates the nut body and the connecting protrusion is formed. A terminal ring portion of a coil-shaped spring is externally fitted to the connecting protrusion and is engaged with the engaging protrusion.

Since both ends of the surface of the nut body are pressed against the lip portion of the lip grooved steel material by the elastic force of the spring, even if the lip grooved steel material is installed in the vertical direction, the nut The body is prevented from sliding down in the lip channel. Then, by inserting the mounting bolt into the member to be fastened and screwing it into the screw hole of the nut body to tighten it, the member to be fastened is connected to the lip channel steel through the mounting bolt and the nut body.

[0004]

However, according to the above-mentioned conventional type, when the connecting projection is provided by welding to the nut body, it takes time and effort to weld the connecting projection to a small nut body. Furthermore, the problem that the nut body is distorted occurred. Further, when the connecting projection is formed by cutting out from the nut body, there is a problem that the cut-off portion is useless and the cutting-out process is troublesome.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a connecting structure connected by a tap plate whose mounting position can be easily positioned and which can be easily manufactured.

[0006]

In order to solve the above problems, a connecting structure according to the present invention is a connecting structure in which a second member is connected to a first member, and a dovetail groove is formed in the first member. A tap plate that can be engaged with the dovetail groove and slidable along the dovetail groove is provided.This tap plate has a cylindrical projection formed in the plate thickness direction by drawing and has a screw hole in the plate thickness direction. And, one end of the compression coil spring is externally fitted and attached to the protrusion, and the tap plate is fitted into the dovetail groove with the other end of the compression coil spring facing inward of the dovetail groove, A coupling tool is provided which is engageable with the second member and screwed into the tapped hole of the tap plate.

[0007]

With the above structure, the tap plate is pressed against the inner surface of the dovetail groove by the elastic force of the compression coil spring in the extending direction. As a result, even when the dovetail groove is formed in the vertical direction, the tap plate is reliably positioned at the target position without sliding down in the dovetail groove. To change the position of the tap plate, the tap plate may be slid along the dovetail groove against the elastic force of the compression coil spring. After the tap plate is positioned, the connector is engaged with the second member and screwed into the screw hole of the tap plate to be tightened. Thereby, the second member is connected to the first member via the connecting tool and the tap plate.

By forming the projection of the tap plate by drawing, welding and shaving can be made unnecessary.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. As shown in FIG. 7, the frame structure 1 is an example of the connection structure. The skeleton body 1 is formed by vertical columns 3 (one example of a first member) located at the four corners, and a plurality of horizontal members 4 (one example of a second member) vertically connecting the columns 3 adjacent to each other. Has been done.

As shown in FIGS. 1 to 3, both ends of the cross member 4 are abuttable on the outward side faces 5 of each of the columns 3, and the outward side faces 5 are provided with the cross members 4. A deviation preventing convex portion 7 that can freely come into contact with each end surface 6 is provided so as to project outward. A vertical dovetail groove 13 is formed on the outward side surface 5.
A rectangular tap plate 14 is provided in the dovetail groove 13, and both ends of the surface of the tap plate 14 are engageable with the inner surface of a horizontal engaging portion 15 formed in the dovetail groove 13, and The tap plate 14 is slidable along the dovetail groove 13.

On the back surface of the tap plate 14, a cylindrical projection 16 protruding in the plate thickness direction is formed by burring processing (a type of inner peripheral drawing processing). That is, as shown in FIGS. 4 and 5, the prepared hole 17 is provided at a predetermined position of the tap plate 14.
Then, by burring, the peripheral portion of the prepared hole 17 is brought in to raise the wall (protrusion 16). By tapping the protrusion 16 formed in this manner, a screw hole 18 in the plate thickness direction is formed as shown in FIG.

Reference numeral 21 denotes a conical compression coil spring, the small-diameter ring portion side of which is externally fitted and attached to the projection 16. And, the tap plate 14 is the compression coil spring.
The compression coil spring 21 is fitted into the dovetail groove 13 in a state in which the compression coil spring 21 is in pressure contact with the inner surface 22 of the dovetail groove 13 at the large-diameter ring portion side.

A mounting bolt 24, which is an example of a connecting tool, penetrates through bolt holes 25 formed at both ends of the horizontal member 4, and is screwed into the screw hole 18 of the tap plate 14 from the opening 26 of the dovetail groove 13. It is tightened together. Thereby, the cross member 4 is connected to the support column 3 via the tap plate 14 and the mounting bolt 24. At this time, the lateral member 4 is restricted from being displaced in the width direction by the protrusion 7 for preventing displacement.

The operation of the structure of the first embodiment will be described below. When the tap plate 14 is manufactured, since the projection 16 is formed on the tap plate 14 by burring processing (a type of inner peripheral drawing processing), even if the tap plate 14 is thin, many effective threads are formed in the screw holes 18. The protrusion 16 can be used to attach the compression coil spring 21 to the tap plate 14 as well.

A tap plate 14 fitted in the dovetail groove 13
Is pressed by the elastic force of the compression coil spring 21 in the extending direction, and comes into pressure contact with the inner surface of the locking portion 15 of the dovetail groove 13. As a result, even with the dovetail groove 13 formed in the vertical direction, the tap plate 14 is reliably positioned at the target position without sliding down in the dovetail groove 13.

To change the mounting position of the tap plate 14, the tap plate 14 may be slid along the dovetail groove 13 against the elastic force of the compression coil spring 21. At this time, since the compression coil spring 21 slides together with the tap plate 14 with the large-diameter ring side abutting on the inner surface 22, it is possible to prevent the compression coil spring 21 from deforming and falling during sliding. The compression coil spring 21 can be slid stably.

As described above, the tap plate 14 is attached to each of the columns 3
After positioning and mounting, the mounting bolt 24 is passed through the bolt hole 25 of the horizontal member 4 and screwed into the screw hole 18 of the tap plate 14 from the opening 26 of the dovetail groove 13 and tightened. As a result, the cross member 4 is connected to the support column 3 via the tap plate 14 and the mounting bolt 24.

To change the connecting position of the cross member 4, the mounting bolt 24 is loosened and the cross member 4 is moved in the length direction of the support column 3. Along with this, the tap plate 14 is a dovetail groove
Slide along 13. Then, by tightening the mounting bolt 24, the tap plate 14 is fixed in the dovetail groove 13, and the cross member 4 is connected to the target position of each of the columns 3. In this way, the frame 3 is assembled by connecting the cross members 4 to the columns 3.

Next, a second embodiment of the present invention will be described with reference to FIG. In the second embodiment, the connecting plate 30 is provided as an example of the second member. That is, a vertical dovetail groove 13 is formed at the inner corner of each pillar 3, and a connecting plate 30 (an example of a second member) is attached to the outer surface of the locking portion 15 of the dovetail groove 13. They are connected to each other via bolts 24 so as to come into contact with and separate from each other. Bolt holes 25 are formed in the connecting plate 30, and the mounting bolts 24 penetrate the bolt holes 25 to form the opening 26 of the dovetail groove 13.
(See FIG. 2) is screwed into the screw hole 18 (see FIG. 2) of the tap plate 14 and tightened. This allows the connecting plate
The column 30 is connected to the column 3 via the tap plate 14 and the mounting bolts 24.

Flange portions 31 are formed at both ends of the connecting plate 30 so that they can come into contact with and separate from the side surfaces of the cross member 4, and the connecting plate 30 is provided with bolts 32 provided on the flange portion 31. Connected to the cross member 4. As a result, the horizontal member 4 is connected to the support column 3 via the connecting plate 30 in a state where both end surfaces 6 of the horizontal member 4 are in contact with the opposite side faces 33 of each support column 3,
Thus, the skeleton pair 1 (see FIG. 7) is formed.

The operation of the second embodiment will be described below. After the tap plate 14 is positioned and attached to each of the columns 3, the mounting bolts 24 are attached to the bolt holes 25 of the connecting plate 30.
Through the opening 26 of the dovetail 13 and tap plate 14
Tighten it by screwing it into the screw hole 18 of. This makes the connecting plate 30
Is connected to the column 3 via the tap plate 14 and the mounting bolt 24.

Then, both end surfaces 6 of each horizontal member 4 are brought into contact with the opposite side surfaces 33 of each column 3, and a connecting plate is provided via bolts 32.
The flange portion 31 of 30 and the cross member 4 are connected. This allows
The cross member 4 is connected to the support column 3 via the tap plate 14, the mounting bolt 24, and the connecting plate 30. To change the connecting position of the cross member 4, the mounting bolt 24 is loosened and the cross member 4 is moved in the length direction of the support column 3. As a result, both end surfaces 6 of the horizontal member 4 slide while being guided by the side surface 33 of the column 3, and the tap plate 14 slides along the dovetail groove 13 so that the connecting plate 30 moves with each horizontal member 4. To be done. And
By tightening the mounting bolt 24, tap plate
14 is fixed in the dovetail groove 13, and the connecting plate 30 and each horizontal member 4 are connected to the target position of each column 3. In this way, the connecting plate 30 and the cross member 4 are connected to the support columns 3 to assemble the frame body 1 as shown in FIG.

In the first and second embodiments, one tap plate 14 is formed with a screw hole 18 at one place and one compression coil spring 21 is attached. When the size and weight of the connecting plate 30 are large, the one tap plate 14 may be provided with the screw holes 18 at a plurality of positions and a plurality of compression coil springs 21 may be attached thereto.

[0024]

As described above, according to the present invention, a tap plate having a screw hole in a protrusion formed by drawing is provided in the dovetail groove of the first member, and one end of the compression coil spring is attached to the protrusion. The tap plate is fitted into the dovetail groove so that the other end of the compression coil spring faces the inside of the dovetail groove and is engageable with the second member and into the screw hole of the tap plate. By providing the coupling tool that can be screwed, the second member can be coupled to the first member by engaging the coupling tool with the second member and screwing and tightening the screw into the screw hole of the tap plate. At this time, since the tap plate is pressed against the inner surface of the dovetail groove by the elastic force of the compression coil spring in the extension direction, even if the dovetail groove is formed in the vertical direction, the tap plate should slide down in the dovetail groove. None, it is reliably positioned at the target position. Therefore, the work of connecting the first member and the second member can be easily performed, and the work time can be shortened.

Further, since the protrusion is formed on the tap plate by drawing, a large number of effective threads can be formed in the screw hole even if the plate thickness of the tap plate is thin, and the protrusion is utilized. A compression coil spring can be attached to the tap plate. This saves the work of welding the protrusions to the tap plate and cutting the protrusions from the tap plate as in the past, and eliminates the strain caused by welding and the waste of material due to cutting. The plate can be manufactured easily and economically.

[Brief description of drawings]

FIG. 1 is a cross-sectional plan view of a connecting portion between a support and a cross member in a first embodiment of the present invention.

FIG. 2 is an enlarged view of the tap plate in FIG.

FIG. 3 is a view on arrow AA in FIG.

FIG. 4 is a vertical cross-sectional view of the tap plate for explaining the burring process when forming a protrusion on the tap plate.

FIG. 5 is a vertical cross-sectional view of the tap plate for explaining the burring process when forming the protrusion on the tap plate.

FIG. 6 is a vertical cross-sectional view of a tap plate for explaining burring processing when forming a protrusion on the tap plate.

FIG. 7 is a front view of a skeleton body that is an example of a connection structure.

FIG. 8 is a cross-sectional plan view of a connecting portion between a column and a connecting plate according to a second embodiment of the present invention.

[Explanation of symbols]

 1 frame structure (connection structure) 3 pillar (first member) 4 cross member (second member) 13 dovetail groove 14 tap plate 16 protrusion 18 screw hole 21 compression coil spring 24 mounting bolt (connector) 30 connection plate (first) (Two members)

Claims (1)

[Claims] 1. A tap structure in which a second member is connected to a first member, wherein a dovetail groove is formed in the first member, and the dovetail groove is engageable with and slidable along the dovetail groove. This tap plate has a cylindrical protrusion formed in the plate thickness direction by drawing and has a screw hole in the plate thickness direction, and one end of the compression coil spring is externally fitted to the protrusion. Attaching, the other end of this compression coil spring is directed inward of the dovetail groove, the tap plate is fitted into the dovetail groove, and is engageable with the second member and screwable with the screw hole of the tap plate. Connection structure provided with a simple connection tool.