JPH09182651A - Corner joint for frame - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve external appearance of corner connection parts of a frame or a casing and safely handle the frame and the casing. SOLUTION: A corner joint for a frame is provided with two insertion parts 1, 2, and a joint part 3 which extends in the direction of a prescribed angle in a connection part of the both insertion parts and interposed between a junction face of two members V, H where the insertion parts 1, 2 are inserted. In this case, at least the joint part is formed from a thermoplastic synthetic resin material, formed into a fin state of the thickness 0.05-0.5mm, and the joint part is provided with a projection height projecting to the outside from a clearance between the junction face by 0.2-2mm in such a state as matched with the junction face of the two members so that the part projecting to the outside from the junction face of the joint parts can be contracted by heat.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a corner joint used for connecting end portions of two members such as a vertical member such as a frame or a frame and a horizontal member at a required angle, and more particularly to a corner joint. The present invention relates to a corner joint having two insertion portions that are inserted into a hollow portion or a semi-hollow portion and a joint portion that is interposed between joining surfaces of longitudinal ends of two members.

[0002]

2. Description of the Related Art Corner joints of this type are used in the actual construction of Shokai 55-
102870,55-113476,55-11656
9 and other publications. FIG. 4 is a front view of a frame formed by connecting a vertical member and a horizontal member by using this type of corner joint with a part omitted, FIG. 5 is an exploded perspective view of one corner, and FIG. 6 is completed. It is a perspective view of a part of the frame.

The corner joint B is entirely made of a hard synthetic resin material, and has two block-shaped insertion portions 1 and 2 extending in a direction perpendicular to each other, and each insertion portion at a connecting portion of both insertion portions. On the other hand, a joint surface 11, which has a thin wall extending in the direction of 45 ° and is cut at 45 ° at the longitudinal ends of the vertical members V and the horizontal members H into which the insertion portions 1 and 2 are fitted,
And a joint portion 3 interposed between the joints 12.

Although the joint portion 3 is thin, 1-2
Since it is formed to have a relatively large thickness of about mm and is formed of a hard synthetic resin material, it has rigidity. When the vertical member V and the horizontal member H are connected using this corner joint, the insertion portions 1 and 2 are inserted into the hollow portion from the 45 ° joint surface of the vertical member and the horizontal member, respectively, and the joint portion 3 By interposing a screw between the opposing joint surfaces in the direction perpendicular to the members V, H from the outside of the vertical member V and the horizontal member H, and screwing into the other members H, V, Connected.

[0005]

By the way, each member V,
It is difficult to perfect the cutting accuracy of the end portion of H or the processing accuracy of the screw through hole, and it is difficult to completely align the thin joint surface of the vertical member and the horizontal member due to a slight decrease in accuracy, It is unavoidable that surface misalignment (displacement in the direction perpendicular to the material axis) may occur. Conventionally, in consideration of this, the protrusion height of the joint portion 3 is set so that when the joint surfaces of the two members V and H are aligned with each other, the joint portion 3 slightly protrudes outward from between the joint surfaces. .

However, the conventional corner joint B described above is used.
Since the joint portion 3 is formed to have a relatively large thickness as described above, and as shown in FIG. 6, the joint portion 3 remains to protrude from the joining surface of the members V and H to the outside by about 1 to 2 mm. However, since the joint portion 3 is conspicuously exposed in the corner portion of the frame or the frame which is the finished product, there is a problem that the appearance is significantly impaired.

Further, when the outer shape of the joint portion does not match the outer surface shape of the frame or the frame, a gap 13 is formed between the joint surfaces on the outside of the corner portion, and a sharp beak shape with an open mouth is formed. There is a risk that the operator may hook his clothes or make contact with the skin to cause injury such as laceration or abrasion.

The present invention has been made in view of the above circumstances, and an object thereof is to expose a joint portion at a corner portion such as a frame or a frame to impair the appearance, and to open a sharp beak. It is to provide a corner joint that prevents the frame and the frame from appearing at a corner portion of the frame and the frame so that the frame and the frame can be handled safely.

[0009]

In order to achieve the above object, the present invention has a joining surface having a bidirectional insertion portion and a joint portion extending at a required angle with respect to these insertion portions. Are symmetric with each other, and the insertion portion is inserted into the hollow portion or the semi-hollow portion of two members having a cross-sectional shape of a hollow portion or a semi-hollow portion, and the joint portion is interposed between the joint surfaces,
In the corner joint that connects the two members, at least the joint portion is formed of a thermoplastic synthetic resin material. As described above, since the joint portion is formed of the thermoplastic synthetic resin material, the joint portion is thermally contracted by heating the joint portion of the two members, and the gap of the joint surface is filled with the joint portion and adheres closely. .

In the above corner joint, the two insertion portions are more than 90 ° and less than 180 ° with respect to each other or 4
The joint portion extends in two directions at an angle of more than 5 ° and not more than 90 °, and the joint portion extends thinly in a direction of a required angle with respect to each insertion portion at a connecting portion of both insertion portions, and the insertion portion is inserted into the joint portion 2 The joint portion is interposed between the joint surfaces at the longitudinal ends of the member, and at least the joint portion is formed of a thermoplastic synthetic resin material and is formed into a fin shape having a wall thickness of about 0.05 to 0.5 mm. Is a state in which the joint surfaces of the two members are perfectly aligned, the joint portion has a protrusion height that protrudes outward by 0.2 to 2 mm from between the joint surfaces. When the two members are connected, it is desirable that the joint portion protruding outward from between the joint surfaces facing each other can be heat-shrinked. With the above configuration, the protrusion height of the joint portion protrudes outward by about 0.2 to 2 mm from between the joint surfaces of the two members to be joined. Therefore, by heating this protruding portion,
The protruding part shrinks, filling the gap between the joint surfaces,
In close contact. Therefore, even when the outer surface of the connecting portion of the two members is seen, the joint portion is not conspicuous and is barely exposed.

Since the joint portion is thin and has elasticity,
If the joint part matches the entire circumference of the joint surface of the two members,
Since the joint portion extends over the entire circumference of the joint surface of the member, a sealing property is added. Furthermore, since the joint part is thin, the joint part is 2
Since the minute gap that may occur between the joint surfaces due to the fact that it does not match the entire shape of the joint surface of the member is extremely small,
Since it does not have a beak-like shape with its mouth open, there is no chance of catching clothes on it, and there is no risk of injury.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the present invention in which two members are connected at a right angle will be described with reference to FIGS. The same members as those of the conventional corner joint shown in FIGS. 4 to 6 are denoted by the same reference numerals, and detailed description thereof will be omitted.

The corner joint NB according to the present invention is formed of a hard synthetic resin material, and has two block-shaped insertion portions 1 and 2 extending in two directions, and a required angle with respect to each insertion portion at a connection portion of both insertion portions. 2 member extending in the direction of the arrow and having the insertion portion inserted therein, that is, the vertical member V
And a joint portion 3 interposed between the joint surfaces of the horizontal members H. The two members have symmetrical joint surfaces and have a hollow portion or a semi-hollow portion into which the insertion portions 1 and 2 are inserted.

In the present invention, the entire corner joint or at least the joint portion 3 is formed from a thermoplastic hard synthetic resin material, and the joint portion 3 is formed into a thin fin shape having a wall thickness of about 0.05 to 0.5 mm. There is. In addition, the joint portion 3 is
With the joint surfaces 11 and 12 of the vertical member V and the horizontal member H facing each other being completely aligned, the joint portion 3 has a protrusion height that protrudes outward by 0.2 to 2 mm from between the joint surfaces. doing.

In this way, when the vertical member V and the horizontal member H are connected using the corner joint NB, the joint portion 3 projects outward from between the joint surfaces 11 and 12 facing each other. So that it can be shrunk.
In this heat shrinkage, the vertical member V and the horizontal member H into which the insertion portions 1 and 2 are respectively inserted are fixed using a known jig in such a state that the joint surfaces 11 and 12 thereof are in close contact with the joint portion 3, This is performed by heating the joint portion of the two members, particularly the protruding portion of the joint portion 3, at a temperature slightly higher than the melting point of the joint portion such as an electric iron or a nozzle burner.

Since at least the joint portion 3 is formed of a thermoplastic synthetic resin material, this heating causes the projecting portion of the joint portion 3 to contract between the joint surfaces of the two members V and H, so that the joint portion between the joint surfaces is formed. Since the gap is filled, the joint surface is in close contact, and
The amount of protrusion of the joint is reduced. In addition, since the joint portion is thinner than before, the joint portion 3 is not conspicuous in the corner portion of the completed frame or frame, as illustrated in FIGS. 2 and 3. Therefore, the appearance of the frame or the frame is improved.

Further, since the joint portion 3 is thin, even if the outer shape of the joint portion 3 does not extend to the tip of the joint surface of the two members V and H, it is between the tip of the joint surface of the two materials V and H. Since the resulting gap is extremely small, when the worker handles the frame or the frame, the clothes are caught in the frame or the corner of the frame,
Injuries are prevented.

Since the joint portion 3 is thin and has some elasticity, when the joint portion has the same outer shape as the joint surface of the two members, the joint portion extends over the entire circumference of the joint surface of the two members. A sealing property is added to the joint portion of the members.

The joint portion 3 may be integrally formed of the same kind of thermoplastic synthetic resin material as the insertion portions 1 and 2, or only the insertion portions 1 and 2 may be formed and then the joint portion is formed. It may be molded with the same kind of synthetic resin material or another kind of thermoplastic synthetic resin material. When molding with another kind of thermoplastic synthetic resin material, the insertion parts 1 and 2 have a large mechanical strength and still have a melting point which does not cause the thermal deterioration of the two members when the joint part 3 is heated. There is an advantage that the joint portion can be easily formed.

Regarding the kind and melting point of the thermoplastic synthetic resin material that can be used for molding the joint portion of the corner joint, those listed below are used in correspondence with the melting points of the two members V and H, for example. be able to. 2 Types of members and melting points Stainless steel 1510 to 1530 ° C Aluminum 660 ° C Types of thermoplastic synthetic resin materials and melting points Polyamide 180 to 260 ° C Polypropylene 160 to 170 ° C Polyethylene 105 to 115 ° C

The above is an example of connecting two members at a right angle, but in the present invention, the two members are 90 ° to each other.
For corner joints when connecting at angles other than
Can be applied. The two inserts of the corner joint in that case depend on the coupling angle of the two members with respect to each other by more than 90 ° and less than 180 ° or more than 45 ° and 90 °.
The joint portion extends in two directions at the following angles, and the joint portion extends thinly in the direction of the required angle with respect to each insertion portion at the connecting portion of both insertion portions.

[0022]

As described above, according to the present invention, by heating the joint portion of the two members, the joint portion is thermally contracted, and the gap between the joint surfaces is filled and closely adhered. , Significantly improved as compared with the conventional one. Further, since the joint portion is thin and has elasticity, when the outer shape of the joint portion is the same as the outer peripheral shape of the joint surface of the two members, the joint portion extends over the entire periphery of the joint surface of the two members, so that sealing performance is added. It Furthermore, since the length of the joint portion does not match the joint surface of the two members, the gap between the joint surfaces of the two members is extremely small, so that the operator such as a frame or a frame may get caught or injured clothes. It is safer than before.

[Brief description of the drawings]

FIG. 1 is a perspective view of a corner joint according to an embodiment of the present invention.

FIG. 2 is a partially omitted front view of a frame assembled using the same corner joint.

FIG. 3 is a perspective view of a part of the same frame.

FIG. 4 is a partially omitted front view of a frame assembled using a conventional corner joint.

FIG. 5 is an exploded perspective view of one corner portion of the same frame.

FIG. 6 is a perspective view of a part of the same frame.

[Explanation of symbols]

 V Vertical material H Horizontal material NB Corner joint 1, 2 Insertion part 3 Joint part

Claims (2)

[Claims] 1. A cross-sectional shape of a hollow portion or a semi-hollow portion, which has insertion portions in two directions and joint portions extending at a required angle with respect to these insertion portions, joint surfaces being symmetrical to each other. A joint for inserting the insertion part into the hollow part or the semi-hollow part of the two members having, and interposing the joint part between the joint surfaces to join the two members, wherein at least the joint part is A corner joint for a frame or the like, which is made of a thermoplastic synthetic resin material. 2. The corner joint for a frame or the like according to claim 1, wherein the two insertion portions are over 90 ° with respect to each other and 180 degrees apart.
The joint portion extends in two directions at an angle of less than 90 ° or more than 45 ° and not more than 90 °, and the joint portion extends thinly in a direction of a required angle with respect to each insertion portion at a connecting portion of both insertion portions, and the insertion portion is inserted. The two joint members are interposed between the joint surfaces at the longitudinal ends, and at least the joint portion is made of a thermoplastic synthetic resin material and is formed into a fin shape having a thickness of about 0.05 to 0.5 mm, and The joint portion is the same as the 2
In the case where the joint surfaces of the members are aligned, the joint portion has a protrusion height that protrudes outward from between the joint surfaces by about 0.2 to 2 mm, and the two members are connected using the corner joint. In addition, a corner joint for a frame or the like is characterized in that the joint portion protruding outward from between the joint surfaces facing each other can be heat-shrinked.