JPH0329445Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a frame connection structure for assemblingly connecting a pair of rail-shaped frames in a mutually orthogonal state.

[Conventional technology]

A conventional frame connection structure of this kind is, for example, as shown in Japanese Patent Publication No. 57-32186,
An engagement groove with a roughly T-shaped cross section is formed on the outer periphery of one frame, and an engagement pin with a head that engages with the groove is coiled in a holding cylinder or the like fitted into the end of the other rail. A configuration has been known in which the connector is inserted via a spring and connected and fixed while being retracted using a set screw screwed in from the side.

[Problem that the invention attempts to solve]

However, the above-described conventional structure requires a special structure for connection, and the connection portion cannot be adjusted at the frame connection assembly site, resulting in poor usability.

In addition, many parts are required for connection, and their shapes are complex, leading to problems in terms of moldability and cost.Therefore, it is desirable to develop a simple connection structure that can eliminate these problems. It is rare.

The present invention was made in view of the above-mentioned circumstances, and when connecting and fixing a pair of frames, it is possible to freely, easily and reliably connect both frames at any position, Moreover, the objective is to obtain a frame connection structure that has a simplified configuration of each part and is advantageous in terms of moldability, ease of assembly, and cost.

[Means for solving problems]

In order to meet such demands, the frame connection structure according to the present invention includes a first frame in which an engagement groove having a substantially C-shaped cross section is formed in the axial direction of the outer circumference, and a second frame having an open receiving hole and assembled perpendicularly to the first frame; a body that is inserted into the receiving hole and held; and an engagement groove between the first frame and the second frame; a connecting pin having a head that is engaged with and held in the receiving hole; a spring that applies a biasing force to the connecting pin in the direction of protrusion within the receiving hole; and the second frame configured to lock the inner end of the spring. a spring locking screw that is screwed in from the side of the frame, and a pin tightening screw that is screwed in from the second frame side in parallel with the spring locking screw and corresponding to the connecting pin side,
The body of the connecting pin is characterized in that a guide surface is formed in which the tightening screw is screwed, thereby moving the connecting pin in the retracting direction against the coil spring.

[Effect]

Insert the spring and connecting pin into the receiving hole of one frame. Next, screw the spring fixing screw into one frame to lock the inner end of the spring. In this case, since the tightening screw is temporarily tightened, the connecting pin is biased by the spring and the head protrudes.

Therefore, insert the head into the engagement groove of the second frame. When the tightening screw is then tightened, the connecting pin is retracted by the guide surface against the spring, and the connecting pins are connected.

〔Example〕

Hereinafter, the present invention will be explained in detail using embodiments shown in the drawings.

Figures 1 and 2 show an embodiment of the frame connection structure according to the present invention, and in these figures, 1 and 2 are first and second walls that are connected orthogonally to each other and have a double wall structure. The second rail-shaped frame has inner and outer wall portions 3 on its outer periphery.
a, 3b, a connecting portion 3c connecting these, and a slit 3d formed along the axial direction in the outer wall portion 3b.
Thus, an engagement groove 3 having a substantially C-shaped cross section is formed. Frames 1 and 2 having a square cross section are used, and the engaging grooves 3 are provided on the four sides of the frames.
This shows the case where each is formed. Also, 4
is a receiving hole formed in the center of the frame by the inner wall portions 3a of these frames 1 and 2.

Reference numeral 5 denotes a connecting pin, which has a rectangular bar-shaped body 5a inserted into the receiving hole 4 from the end of the first frame 1, and a head 5b that is engaged and held in the engagement groove 3 on the second frame side. has. 6 is a coil spring that urges the connecting pin 5 in the projecting direction; 7 is fitted from the end into the engaging groove 3 of the first frame 1 adjacent to the connecting pin 5 in parallel with the connecting pin 5; This is a bracket equipped with screws 8 and 9 for pin tightening.

Further, on one side of the body portion 5a of the connecting pin 5,
Pin tightening screw 9 on the bracket 7 mentioned above
is a wedge-shaped engagement having a guide surface 10a that moves the connecting pin 5 in the retracting direction against the biasing force of the coil spring 6 by being screwed into the receiving hole 4 through the hole 9a of the inner wall 3a. A stop groove 10 is formed. 8a in the figure is a hole portion into which the spring fixing screw 8 is inserted into the receiving hole 4.

In the above-mentioned configuration, when connecting the frames, first, the bracket 7 having two screws 8 and 9 from the end side, respectively, is inserted into the engagement groove 3 and the receiving hole 4 in the first frame 1, and then the coil The spring 6 and the body 5a of the connecting pin 5 are prepared in a sequentially fitted state. Here, the spring fixing screw 8 is screwed in in advance to the end, and the pin tightening screw 9 is screwed in temporarily.

Next, in this state, the connecting pin head 5b is inserted from the side into an arbitrary position within the engaging groove 3 on the second frame side, and is engaged and held by rotating it together with the frame 2. . After that, the pin tightening screw 9 is further screwed into the guide surface 10.
By moving the frame 1 and 2 in the retracting direction by a, it becomes possible to connect and connect both frames 1 and 2 in an appropriate crimping state.

According to such a configuration, when connecting both frames 1 and 2, one frame 2
On the other hand, since it is only necessary to simply drill holes 8a and 9a for screw insertion at the required positions, the connection points can be freely selected and connected at the work site, and its practical effects are is big.

Note that the present invention is not limited to the structure of the embodiment described above, and the shape and structure of each part may be modified and changed as necessary. For example, in the above-mentioned embodiment, when the rail-like frames 1 and 2 are made of the same member having a double wall structure, which has a rectangular shape and has engagement grooves 3 on its four sides and a receiving hole 4 in the center. Although the present invention is advantageous in that the number of parts can be omitted, the present invention is not limited to this, and may be formed in a shape such as a circle or an appropriate polygon. The number of engagement grooves may be selected appropriately from two or more, and various modifications have been considered, such as omitting the bracket 7 as a member for incorporating the screws 8 and 9 and directly screwing them into the frame 2 side. It is something that can be done.

In short, one frame 1 has a connecting pin head 5b.
If the other frame 2 has a structure and shape in which a receiving hole 4 is formed at the end thereof and into which the connecting pin body 5a is inserted, , which can be modified in various ways.

[Effect of idea]

As explained above, the frame connection structure according to the present invention includes a first rail-shaped frame having an engagement groove on the outer periphery, and a receiving hole that is assembled perpendicularly to the first rail-shaped frame and opens at the center of the end. a second rail-shaped frame; a connecting pin having a body that is engaged and held in the receiving hole from the end of the frame; and a head that is engaged and held in the engagement groove; A spring that applies a biasing force in the direction, a spring locking screw that is screwed in from the side of the frame that locks the inner end of the spring, and a pin tightening screw that is screwed in parallel to this into a position corresponding to the side of the connecting pin. A locking groove is formed in the body of the connecting pin with a guide surface that moves the connecting pin in the retracting direction against the spring by screwing the tightening screw into the body of the connecting pin. It was possible to firmly connect the paired frames in an appropriate and reliable crimped state at any position by simple work. In addition, it can be removably connected, the structure of each part is simplified, and it is excellent in terms of moldability and cost, and has great practical effects.

[Brief explanation of the drawing]

The drawings show an embodiment of the frame connection structure according to the present invention, and FIG. 1 is an exploded perspective view showing a schematic structure, and FIG. 2 is a sectional view showing a connected state. 1, 2...Rail-shaped frame, 3...Engagement groove,
3a, 3b...inner and outer wall parts, 3c...connecting parts, 3
d...Slit, 4...Reception hole, 5...Connecting pin, 5a...Body, 5b...Head, 6...Coil spring, 7...Bracket, 8...Spring fixing screw, 9... ...Pin tightening screw, 10...Latching groove,
10a...Guide surface.

Claims (1)

[Scope of utility model registration request] A first frame in which an engagement groove having a substantially C-shaped cross section is formed in the axial direction of the outer periphery, and a receiving hole that is open at least at an end, and is assembled perpendicularly to the first frame. a second frame;
a connecting pin having a body that is engaged and held in the receiving hole and a head that is engaged and held in the engaging groove of the first frame; and a connecting pin that projects in the receiving hole with respect to the connecting pin. a spring that applies a biasing force to the second frame; a spring locking screw that is screwed into the second frame from the side so as to lock the inner end of the spring; A pin tightening screw is screwed in from the second frame side portion in correspondence with the connecting pin side portion, and the tightening screw is screwed into the body of the connecting pin to prevent the connecting pin from resisting the coil spring. A frame connection structure characterized in that a guide surface is formed to move the frame in the retracting direction.