JPH0119907Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a forming frame connecting device for connecting frame materials using a connecting tool to create a forming frame such as a picture frame or a panel.

[Conventional technology]

The present applicant previously proposed a connecting device for forming frames that connects metal frame members using resin connectors (Utility Application No. 199415/1983).

As shown in FIG.
Support ridges 3 are provided on the edges and the inner surfaces of the side plates 1b, 2b, and fitting holes 4 are provided in the back plates 1c, 2c,
On the other hand, as shown in FIG. 2, holding protrusions 6 are provided on the side plate 5a and back plate 5b of the resin connector 5 having an L-shaped cross section, and a small protrusion 7 is provided on the back plate 5b side to connect to the side plate 5a. A flexible piece 8 is provided. Then, as shown in FIG.
c and 2c, and side plates 1 of frame materials 1 and 2.
Support protrusions 3 provided on the edges of a, 2a and back plates 1c, 2
By inserting the connecting tool 5 into the tips of the frame members 1 and 2 while holding the side plate 5a of the connecting tool 5 with the screws c and 5, and engaging the small protrusion 7 into the fitting hole 4. , two frame members 1 and 2 are connected at right angles.

In addition, similar to the invention related to the above-mentioned prior application, in order to facilitate the assembly of the frame members constituting the forming frame, a frame member having a decorative plate insertion groove and an inclined end face and an L connecting the frame members are provided. The frame member is provided with an insertion portion that is open at the end surface through which one side of the connector is inserted, and each piece of the connector has a V-shaped bent piece extending in both directions. In addition, a device was developed in 1973 in which the connecting tool was provided with a claw on one side edge and a long hole along the edge, and the frame member was provided with a fitting hole into which the claw engaged. -Disclosed in Publication No. 102895.

[Problems to be solved by the invention] However, since the above-mentioned connecting device according to the applicant's earlier application has a slit 9 between the back plate 5b of the connecting device 5 and the flexible piece 8, , the flexibility of the flexible piece 8 having the small projections 7 is very good. Therefore, due to its flexibility, there was a risk that the small protrusion 7 would come off from the fitting hole 4 in which it was fitted, when an external force was applied to the small protrusion 7. Therefore, there was a problem that the forming frame was distorted or damaged.

Moreover, even in the device disclosed in the above-mentioned publication, when the claw that engages with the fitting hole is pushed inward,
Although the claw engages with the fitting hole due to the spring force created by providing the elongated hole, if an external force is applied on the contrary, the part where the claw is formed is flexible, so the claw engages with the fitting hole. There was a risk that it would come off from the fitting hole. However, since the connector is a plate material with a planar cross section,
It is not able to withstand external forces from all directions, and in addition to the fact that the claws come off from the fitting holes as described above, there is also the drawback that the connecting portions of the frame members are distorted by external forces.

[Purpose of invention]

The present invention was developed in view of the above, and by preventing the small protrusion of the connector from coming off the fitting hole of the frame material, the forming frame is prevented from being distorted when external force is applied. The object of the present invention is to provide a forming frame connecting device that will not be damaged.

[Means for solving problems]

In order to achieve such an objective, the present invention has a metal frame member having a U-shaped cross section and consisting of both side plates and a back plate sandwiched between the two side plates, and a metal frame member formed from the back plate and side plates, a resin connecting tool having an L-shaped cross section that is inserted into the end of each frame material and sequentially connects the frame materials;
At the edges of the side plate and back plate of the connector, holding protrusions are provided that protrude on the same plane as the side plate and back plate, respectively, and small protrusions are provided at both ends of the side plate or back plate, and the above-mentioned A support protrusion is provided on the inner surface of one of the side plates of the frame material to clamp the holding protrusion of the connector inserted into the frame material between the back plate of the frame material, and both side plates of the frame material are provided. A supporting protrusion is provided on the edge of the frame material to hold either the side plate or the back plate of the connecting device between the back plate of the frame material, and the connecting device is provided on the back plate of the frame material or one of the side plates. A fitting hole is provided in which the small protrusion engages.

[Effect of invention]

According to the present invention, the cross section L inserted into the end of the frame material
The letter-shaped connector is held between the supporting protrusion of the frame material and the back plate, and since the small protrusion of the rigid connector is securely engaged with the fitting hole, the frame material is Even if an external force is applied to the connecting portion from any direction, the connecting tool will not come off the frame member, and the connecting tool will firmly maintain the connected state of the connecting portion against such external force.

[Example of idea]

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

FIG. 3 shows an embodiment of the forming frame connecting device according to the present invention.

In the figure, reference numerals 10 and 11 indicate metal frame members having a U-shaped cross section. The details are exactly the same as those proposed earlier, so the explanation will be omitted. On the other hand 12
is a resin connector with an L-shaped cross section and overall shape. In detail, arc-shaped retaining protrusions 13 are provided on the edges of the side plates 12a and the back plate 12b, and triangular small protrusions 14 are attached directly to the back without providing a flexible piece as shown in Fig. 1. They are provided at both ends of the plate 12b. That is, in this embodiment, instead of the structure in which small protrusions are provided on the flexible piece as shown in FIG. By having an L-shaped cross section, the connecting tool 12 can firmly maintain the connected state of the connecting portion even when external force is applied to the connecting portion from any direction.

Since this embodiment is constructed in this way, the above-mentioned L-shaped connector 12 is connected to the frame member 10, respectively.
11, and insert the small protrusion 14 into the fitting hole 1.
6, the forming frame is assembled.

Then, the holding protrusion 13 of the connecting tool 12 inserted into the end portions of the frame members 10, 11 is held between the support protrusions 15 of the frame members 10, 11 and the back plates 10c, 11c, and
The side plate 12a of the connector 12 is held between the support ridges 15 provided on the edges of the side plates 10a, 11a of the frame members 10, 11 and the back plates 10c, 11c, and the small protrusion 14 of the connector 12 has rigidity. Since the connector 12 is securely engaged with the fitting hole 16, the connector 12 will not come off from the connecting part of the frame members 10, 11, and the frame members 10, 11 will not come off.
The connector 12 firmly maintains the connected state of the connecting portion 11 against external forces applied to the connecting portion from all directions.

Therefore, the holding strength of the forming frame is always maintained, and distortion and damage of the forming frame due to external forces are eliminated.

Although the above embodiment shows an example in which metal frame members are connected at right angles using a connecting tool whose entire shape is L-shaped, the present invention is not limited to this, and the connecting tool is connected as a whole at right angles. It can also be used to connect metal frame members in a straight line in the middle of the forming frame. Incidentally, this case is suitable for making a large forming frame.

Further, in the above embodiment, the small protrusions are provided on the back plate of the connector, but they may be provided on the side plates if necessary. In this case, it is necessary to provide a fitting hole in the side plate of the frame material. Note that the shape of the small protrusion is not limited to a triangle, but may be semicircular, and the shape is not particularly limited.

[Effect of idea]

As described above, the present invention consists of a metal frame member having a U-shaped cross section, consisting of both side plates and a back plate sandwiched between the both side plates, and the back plate and side plates, and each adjacent frame member and a resin connecting tool having an L-shaped cross section that is inserted into the end of the frame member and sequentially connects the frame members, and a connecting tool is provided at the edge of the side plate and the back plate of the connecting tool on the same plane as the side plate and the back plate, respectively. A holding protrusion is provided that protrudes from the side plate, and small protrusions are provided at both ends of the side plate or back plate, and a connecting tool that is inserted into the frame member is provided on the inner surface of one of the side plates of the frame member. A support protrusion is provided to hold the holding protrusion between the back plate of the frame material, and at the edges of both side plates of the frame material, either the side plate or the back plate of the connecting device is provided between the back plate of the frame material and the support protrusion. A support ridge is provided to hold one of the two sides, and a fitting hole is provided in the back plate of the frame material or one of the side plates to engage the small protrusion of the connector. The connecting tool will not come off from the connecting portion of the frame material, and the connecting tool will firmly maintain the connected state of the connecting portion of the frame material against external forces applied from any direction to the connecting portion of the frame material.

Therefore, the holding strength of the forming frame is always maintained, and distortion and damage of the forming frame due to external forces are eliminated.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional perspective view of an example of the previously proposed connecting device for forming frames, FIG. 2 is an enlarged perspective view of a connecting tool used in the connecting device of FIG. 1, and FIG. 3 is a forming according to the present invention. FIG. 2 is an exploded perspective view of an embodiment of a frame connecting device. Explanation of symbols of main parts, 10, 11...Frame material, 10a, 10b, 11a, 11b, 12a...
...Side plate, 10c, 11c, 12b... Back plate, 12
... Connector, 13... Holding protrusion, 14... Small protrusion, 15... Support protrusion.

Claims (1)

[Scope of utility model registration request] A metal frame material with a U-shaped cross section consisting of both side plates and a back plate sandwiched between the both side plates, and a back plate and side plates that are inserted into the ends of each adjacent frame material to form a frame material. a resin connecting tool having an L-shaped cross section that sequentially connects the connecting devices, and retaining protrusions are provided on the edges of the side plates and the back plate of the connecting device, respectively, to protrude on the same plane as the side plates and the back plate, and Small protrusions are erected at both ends of the side plates or the back plate, and holding protrusions of the connector to be inserted into the frame material are attached to the inner surface of one of the side plates of the frame material so that the retaining protrusions are attached to the back plate of the frame material. At the same time, a support ridge is provided to clamp either the side plate or the back plate of the connecting device between the frame member and the back plate of the frame member. A connecting device for forming frames, characterized in that a back plate or one of the side plates of the frame member is provided with a fitting hole into which the small protrusion of the connecting tool engages.