JPH0860946A - Corner joint - Google Patents

Abstract

PURPOSE: To easily achieve accurate positioning of frame rods. CONSTITUTION: This corner joint 10 comprises an L-shaped bottom part 12 formed to have 90 degrees, and opposite side pieces 14, 14 extended inward by the required length from both horizontal side edges of the L-shaped bottom part 12. First and second tongues 20, 20 of nearly U shaped section to be fitted into an approximately square cavity 34a formed in a frame rod 34 are formed at right angles to each other. At the corner of each side piece 14 where a vertically extending inner edge 14a crosses a horizontally extending inner edge 14b, an outwardly recessed portion 16 of the required shape is formed. The end face 16a of the recessed portion 16 is positioned to coincide with the imaginary crossing point of the inner edges 14a, 14b of the side piece 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a corner joint, and more particularly to a corner joint capable of easily connecting a pair of frame rods formed into a required cross-sectional shape by drawing or the like at a required angle. Is.

[0002]

2. Description of the Related Art A drawing material having a required cross-sectional shape obtained by molding a material such as a resin by drawing is cut into a length according to the size of a product to be used and appropriately cut into various frame bodies or the like. It's being used. FIG. 5 is a schematic perspective view of a refrigerating showcase in which a glass door using the drawn material is arranged, and a plurality of glass doors 3 are provided on the front surface of the showcase 50.
0 is arranged to be openable and closable. The glass door 30 is formed by fitting a rectangular glass 32 inside a square-shaped frame body 31. The frame body 31 has four sides of the glass 32 as shown in an exploded state in FIG. Four frame rods 34,3 fitted to
4, 34, 34 and four corner joints 36, 36, 36, which connect the frame rods 34, 34 to each other at the corners.
And 36. The frame rod 34 is a hollow drawing material whose both ends in the longitudinal direction are cut at an angle of 45 degrees, and by aligning and abutting the ends of the pair of frame rods 34, 34 facing each other at the corners. The frame rods 34, 34 are positioned at right angles. Further, the corner joint 36 is formed in an L shape, and is configured so that the first fitting insertion portion 36a and the second fitting insertion portion 36a, which are orthogonal to each other, are fitted into the cavity portions 34a of the corresponding frame rods 34, respectively. . Then, each frame rod 34 is fitted into the corner joint 36, and the joint 36 and each frame rod 34, 34 are screwed with the end portions of both frame rods 34, 34 aligned and abutting.
A pair of frame rods 3 can be fixed by fixing them (not shown) or the like.
4,34 are connected at right angles.

In assembling the glass door 30, firstly, the first fitting insertion portion 36a and the second fitting insertion portion 36a of each corner joint 36 correspond to the cavity 3 of the frame rods 34, 34.
4a and 34a are fitted and inserted for a required length, and the frame 31 is temporarily assembled with the internal dimension larger than the external dimension of the glass 32. Then, the frame body 31 in the temporarily assembled state is positioned at a position surrounding the glass 32 placed at the center of the workbench. Then, using a dedicated jig (not shown), the four frame rods 3
By pressing each of 4, 34, 34, 34 inward, each frame rod 34 is fitted into the corner joint 36 and the frame body 31 shrinks, and the glass 3 is placed inside the frame body 31.
2 is fitted. Then, the assembly of the glass door 30 is completed by screwing and fixing the corner joints 36 and the frame rods 34, 34.

[0004]

As the corner joint 36, a cast molded product made of zinc, aluminum or the like is preferably used in consideration of manufacturing cost, strength and the like. When the L-shaped corner joint 36 is cast-molded, stress may concentrate on the inner corners of the corner joint 36, causing cracks. Therefore, as shown in FIG. 7, a circular relief portion is formed at the corner. 40 is provided. The relief portion 40 is formed by the two fitting insertion portions 36a of the joint 36,
It was usual that the inner edge of 36a was recessed from the virtual intersection A to the outer side.

As described above, when the glass door 30 is assembled by using the dedicated jig, the balance of the pressing force against the frame rods 34 is not uniform, or the corner joint 36 is used.
Fitting portions 36a, 36a and the hollow portion 34 of the frame rods 34, 34
When the fitting state with respect to a and 34a is different, one frame rod 34 is quickly fitted into the fitting insertion portion 36a, and the other frame rod 34 is inserted into the fitting insertion portion 36a with a delay. There is. In such a case, as shown in FIG. 8, in the frame rod 34 (shown by a solid line in the figure) that is inserted early, the inner end 35 of the hollow portion 34a of the frame rod 34 contacts the end surface 40a of the escape portion 40. It will be inserted up to the position. As described above, since the end surface 40a of the relief portion 40 of the corner joint 36 is located outside the virtual intersection A, the frame rod 34 is inserted with a delay (indicated by a chain double-dashed line in the figure). Will come into contact with the end of the frame rod 34 that has already been inserted before being inserted into the proper position. That is, in this state, the ends of both frame rods 34, 34 are not aligned, so the bias of the dedicated jig for pressing is released, and the positions of both frame rods 34, 34 are corrected again while the jigs are being realigned. It requires a troublesome reworking work, which requires time to assemble and requires skill.

[0006]

SUMMARY OF THE INVENTION In view of the problems inherent in the above-mentioned corner joints, the present invention has been proposed in order to suitably solve the problems. It is an object of the present invention to provide a corner joint capable of shortening the time and simplifying the work.

[0007]

SUMMARY OF THE INVENTION In order to overcome the above-mentioned problems and preferably achieve an intended purpose, the present invention is directed to a case where a first fitting insertion portion and a second fitting insertion portion are formed at required angles and A corner joint that connects a pair of frame rods at a required angle with which the end portions of the frame rods are in contact with each other by inserting the frame rods into the insertion portions, and the inside corner portions of the corner joints are connected to the outside. A relief portion that is recessed toward the inner side of the frame rod that is set so that the end face of the relief portion is set to coincide with a virtual intersection of inner edges of the both insertion insertion portions and that is inserted into each of the insertion insertion portions is formed. It is characterized in that the ends of the pair of frame rods are aligned and abutted at the positions where the ends abut the end faces of the relief portions.

[0008]

The preferred embodiments of the corner joint according to the present invention will now be described with reference to the accompanying drawings.
This will be described below. It should be noted that in the embodiment, the case where the glass door of the refrigerating showcase is formed by using the corner joint will be described, but it can be used for connecting frame rods constituting other various frame bodies. Further, the same members already mentioned in the conventional glass door described with reference to FIGS. 5 to 8 are designated by the same reference numerals.

FIG. 1 is an exploded perspective view of a main part of a glass door adopting a corner joint according to an embodiment of the present invention. The corner joint 10 according to the embodiment is a frame rod 34.
L-shaped bottom portion 12 formed to have an abutment connection angle of 90 degrees
And inside from both side edges of the L-shaped bottom portion 12 in the width direction (glass 3
2) and a pair of side pieces 14 and 14 that face each other and extend for a required length toward the direction 2), and the first fitting insertion portion 20 and the second fitting insertion portion 20 having a substantially U-shaped cross section are formed at right angles. Has been formed. Then, each fitting insertion portion 20 is adapted to be fitted and inserted into the hollow portion 34a formed in the substantially rectangular shape of the frame rod 34. The outer surface of the fitting insertion portion 20 is in close contact with the inner surface of the hollow portion 34a of the frame rod 34, so that the corner joint 10 and the frame rod 3 are connected.
4 is set so that they can be fitted together without rattling (Fig. 4
reference).

At the corners where the vertically extending inner edge 14a and the horizontally extending inner edge 14b of each of the side pieces 14 intersect, a relief portion 16 of a required shape is provided which is recessed outward. Is formed to prevent stress from concentrating on the corners and causing cracks or the like when the corner joint 10 is cast. The end surface 16 of this relief portion 16
As shown in FIG. 2, the position of a is the inner edge 1 of the side piece portion 14.
It is set to coincide with the virtual intersection A of 4a and 14b. That is, the frame rod 34 fitted into the fitting portion 20 of the corner joint 10 has the inner end 35 of the hollow portion 34a.
Is positioned by contacting the end surface 16a of the escape portion 16, and in this state, the end portion of the frame rod 34 fitted and inserted in the other fitting insertion portion 20 has the frame rod already fitted and inserted, as shown in FIG. Is configured to abut and abut the ends of 34. Although the relief portion 16 of the embodiment is an example in which the relief portion 16 is recessed in a substantially quadrangular shape, as long as the end surface 16a thereof coincides with the virtual intersection point A and the stress at the time of molding can be dispersed appropriately, The shape and size are not limited to the examples.

A plurality of screw holes 18 for screwing are provided at predetermined positions of the side piece portion 14, and a plurality of screw holes 42 are provided on both side surfaces of the frame rod 34. There is.
These holes 18 and 42 fit and insert the fitting insertion portion 20 of the corner joint 10 into the hollow portion 34a of the frame rod 34, and the inner end 35 of the hollow portion 34a has end faces 16a and 1 of the relief portions 16 and 16.
It is set to be aligned and matched at the position where it abuts against 6a. Then, by screwing a screw 46 into each of the holes 18 and 42, the corner joint 10 and the frame rod 34 are fixed. The holes 22, 22 are formed on one side of the L-shaped bottom portion 12.
And the holes 22 and 22 are formed as shown in FIG.
It is set so as to coincide with the holes 44 formed in the outer surface of the frame rod 34. A fulcrum shaft 26 arranged in the refrigerating showcase 50 is inserted into both holes 22 and 44, and functions so that the glass door 30 can be opened and closed centering on the fulcrum shaft 26.

[0012]

Next, the operation of the corner joint according to the embodiment thus constructed will be described. In order to assemble the glass door 30, first, as described above, the first fitting insertion portion 20 and the second fitting insertion portion 20 of each corner joint 10 are first prepared.
Is inserted into the corresponding hollow cavities 34a, 34a of the frame rods 34, 34 by a required length, and is temporarily assembled in a state where the internal dimensions of the frame 31 are larger than the external dimensions of the glass 32. Then, the frame body 31 in the temporarily assembled state is positioned at a position surrounding the glass 32 placed at the center of the workbench. Then, each of the four frame rods 34, 34, 34, 34 is pressed inward by a dedicated jig, so that each frame rod 34 is fitted into the fitting insertion portion 20, 20 of the corner joint 10. Meanwhile, the frame body 31 shrinks, and the glass 32 is fitted inside the frame body 31.

As described above, since the end surface 16a of each relief portion 16 formed in the corner joint 10 coincides with the virtual intersection A of the inner edges 14a and 14b of the side piece portion 14, the cavity in each frame rod 34 is made. Inner end 35 of portion 34a
Is positioned by being inserted into a position where it comes into contact with the end surface 16a. And at this time, both frame rods 3
The ends of 4, 34 are aligned and abutted at the proper position as shown in FIG. That is, the balance of the pressing force by the jig is not uniform, or the fitting insertion portion 2 of the corner joint 10 is
0, 20 and the hollow portions 34a, 34a of the frame rods 34, 34, even if one of the frame rods 34, 34 is inserted earlier and the other is inserted later, due to the difference in the insertion state. , The frame rods 34, 34 are always aligned and abutted at proper positions. In addition,
Since the outer surface of each fitting insertion portion 20 of the corner joint 10 and the inner surface of the corresponding cavity portion 34a of the frame rod 34 are in close contact with each other, and both 10, 34 are tightened and fixed by the screw 46, the frame rod 34, 34 are securely connected and fixed in a right angled state.

In the embodiment, the case where the pair of frame rods are connected at a right angle by the corner joint has been described.
The present application is not limited to this, and if the angle between the first fitting insertion portion and the second fitting insertion portion of the corner joint is set to an obtuse angle or an acute angle, the pair of frame rods should be connected at an angle other than a right angle. Is also possible.

[0015]

As described above, according to the corner joint of the present invention, the end surface of the relief portion formed at the inner corner portion of the corner joint is provided with the first fitting insertion portion and the second fitting insertion portion. Since it is set so as to coincide with the virtual intersection point of the inner edge of each of the frame rods, the frame rods can be properly inserted into the insertion portion until the inner ends of the frame rods come into contact with the end faces of the relief portions. It can be easily positioned at various positions. Therefore, when connecting the frame rods, the balance of the pressing force of the jig used is not uniform, and the fitting state of both the fitting portions of the corner joint and the frame rods are different. Even if one of the frame rods is inserted earlier and the other is inserted later, the ends of both frame rods can always be aligned and abutted at proper positions. That is, there is an effect that no skill is required for connecting the frame rods and no reworking work is required, and the assembling work is extremely simple.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a main part of a glass door adopting a corner joint according to a preferred embodiment of the present invention.

FIG. 2 is a side view of the corner joint according to the embodiment.

FIG. 3 is an explanatory view showing a state in which a frame rod is fitted and inserted into one fitting and inserting portion of the corner joint.

FIG. 4 is a vertical sectional side view showing a corner portion of a glass door.

FIG. 5 is a perspective view showing an example of a refrigerating showcase provided with a glass door.

FIG. 6 is a schematic perspective view showing an exploded state of a glass door adopting a corner joint according to a conventional technique.

FIG. 7 is a side view showing a corner joint according to a conventional technique.

FIG. 8 is an explanatory view showing a state where a frame rod is fitted and inserted into one fitting and inserting portion of a corner joint according to a conventional technique.

[Explanation of symbols]

10 corner joints, 14a, 14b inner edge,
16 relief part 16a end face, 20 fitting insertion part, 34 frame rod, 35 inner end, A virtual intersection

Claims (1)

[Claims] 1. A first fitting insertion part (20) and a second fitting insertion part (20) are formed at a required angle, and a frame rod (34) is fitted into each fitting insertion part (20). , A corner joint that connects a pair of frame rods (34, 34) at a required angle with which the end portions are in contact, and the inner corner portion of the corner joint (10) is provided with a recess toward the outside. The escape portion (16) is formed, and the end surface (16a) of the escape portion (16) coincides with the virtual intersection (A) of the inner edges (14a, 14b) of the both fitting insertion portions (20, 20). Is set so that the inner end (35) of the frame rod (34) fitted and inserted into each of the fitting portions (20) comes into contact with the end surface (16a) of the relief portion (16), and the pair of frame rods
A corner joint, characterized in that the ends of (34, 34) are configured to abut and abut.