JPH08112630A - Joining structure of metal plate for frame body - Google Patents

Abstract

PURPOSE: To provide a joining structure of a metal plate for a frame body where the joining working is simple and the joining precision is high. CONSTITUTION: Projecting parts 3 and recessing parts 4 are formed on a joining periphery 2 of a metal plate 1, projecting parts 7 and recessing parts 8 are formed on a joining periphery 6 of a metal plate 6 in the reverse pattern to the projecting parts 3 and the recessing parts 4, and the projecting parts 3, the recessing parts 4 and the projecting parts 7, the recessing parts 8 of both joining peripheries 2, 6 are fitted and pressed in. On the projecting parts 3, 7, broad lateral width engaging projecting parts 10, 11 are formed, and the opposite recessing parts 4, 8, the engaging parts 12, 13 with more narrow width than the engaging projecting parts 10, 11 are formed. Then, the projecting parts 3, the projecting parts 7 of the metal plates 1, 5 being fit are pressed and enlarged outside. Next, a 3rd metal plate 16 is placed to the back side of the joining part of the metal plates 1, 5, a projected part 17 than a partial of the joining part of the both metal plates 1, 5 is pressed-out to the back side is pressed inside the caulking hole 15 of the metal plate 16 and the projected part 17 is folded to the outside of the hole 15 and caulked.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joining structure for joining a metal plate and a metal plate on the same plane to form a frame (frame). It is suitable for forming a square frame such as a signboard frame and a frame for a picture frame, and for forming other triangular or round frames.

[0002]

2. Description of the Related Art The technique of joining metal plates includes welding,
Although there are many methods such as bolt tightening and riveting, welding is mainly used to assemble the rectangular frame B of the filter A as shown in FIG. 4, for example. There are various types of this welding, but in the assembly of the frame B, argon welding (arc welding performed in an argon gas atmosphere or gas welding) or spot welding is often used. Argon welding is shown in Figure 5.
As shown in FIG. 5, the joining portion E of the abutted metal plates C and D is welded with a welding rod (not shown). In this welding, a raised bead F is formed at the welded portion as shown in the figure. In spot welding, as shown in FIG. 6, a metal piece G is applied to the back surface of a joint E between the abutted metal plates C and D, and in this state, the metal plates C and D and the metal piece G are electroded from above and below. It is sandwiched between, and a large current is applied by applying pressure to perform spot welding. In this welding, the welded portion H is slightly dented.

[0003]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
The joining of metal plates by welding such as spot welding has the following problems. ． Since the welding is performed manually, it takes time to produce the product, and variations in the product are likely to occur depending on the operator, which makes it difficult to mass produce the product. Welding robots can solve these problems, but robots are so expensive that only a few companies can introduce them. ． Since the metal plate expands due to the heat generated during welding, it is difficult to join the metal plates with desired dimensional accuracy. ． In particular, in the case of argon welding, the bead F rising like a mountain is left at the joining portion E, so the rising portion must be scraped off later. If the joined metal plates are hairline processed,
If the bead F is scraped off, the hairline processing is lost only for that part and the appearance is bad. Therefore, it is necessary to perform the hairline processing after the scraping and pattern matching with the metal plate, which is troublesome work. ． In the case of spot welding, the welded portion H is dented, so
There is a problem that it looks bad.

SUMMARY OF THE INVENTION An object of the present invention is to provide a joining structure for a metal plate for a frame which is easy to join and has a high joining accuracy.

[0005]

The joining structure of the metal plate for a frame according to claim 1 of the present invention is as shown in FIGS.
In the joint edge 2 of the second metal plate 5 for frame, which is formed with the convex portion 3 and the concave portion 4 on the joint edge 2 of the metal plate 1 for frame, and is joined to the first metal plate 1 for frame, The convex portion 7 and the concave portion 8 are formed in a pattern opposite to that of the convex portion 3 and the concave portion 4, and the convex portions 3 of both joint edges 2 and 6 are formed.
The recesses 4, the protrusions 7, and the recesses 8 are fitted and press-fitted to join the two metal plates 1 and 5 for the frame.

According to the second aspect of the present invention, in the joint structure for a metal plate for a frame body, the protrusions 3 and 7 have locking projections 10 having a wide width.
11 is formed, and locking portions 12 and 13 having a width narrower than that of the locking projections 10 and 11 are formed in the concave portions 4 and 8 into which the convex portions 3 and 7 fit.

As shown in FIG. 3, the joint structure of the frame metal plate according to the third aspect of the present invention is such that the convex portion 3 and the second portion of the first frame metal plate 1 fitted to each other are connected to each other. The convex portion 7 of the metal plate 5 for a frame is pressed and spread outward.

As shown in FIG. 2, the joint structure of the frame metal plate according to claim 4 of the present invention is such that the joint portion of the first frame metal plate 1 and the second frame metal plate 5 is Hole 15 for caulking on the back side
The third metal plate 16 having an open end, and the protruding portion 17 in which a part of the joint portion of the first and second frame metal plates 1 and 5 is extruded to the back side is in the caulking hole 15 of the metal plate 16. The protrusion 17 is pushed back to the outside of the caulking hole 15 and caulked.

[0009]

In the joint structure of the metal plate for a frame according to claim 1 of the present invention, the convex portion 3 and the concave portion 4 formed on the joint edge 2 of the metal plate 1 for the first frame, and the second frame body Since the joining of the metal plates 1 and 5 for both frames is completed only by fitting and press-fitting the convex portion 7 and the concave portion 8 formed on the joining edge 6 of the metal plate 5 for frame, the joining is easy. The joint is flat.

In the joint structure of the frame body metal plates according to the second aspect of the present invention, the joined frame body metal plates 1 and 5 are provided with the projections 3,
Since the locking projections 10 and 11 having a wide width formed in 7 and the locking projections 12 and 13 having a width narrower than the locking projections 10 and 11 formed in the recesses 4 and 8, are locked, Even if the joined frame metal plates 1 and 5 are pulled in the direction opposite to the joining direction, they cannot be removed.

According to the third aspect of the present invention, in the joint structure of the frame metal plates, the joined frame metal plates 1 and 5 have the projections 3,
The metal plates 1 and 5 for both frames are firmly joined and hard to come off because they are locked to each other at the portions where the pressure is applied to 7 and pushed outward.

In the joint structure for a metal plate for a frame according to claim 4 of the present invention, the first metal plate 1 for a frame body and the second metal plate 5 for a frame body are respectively connected to the third metal plate 16. Since the caulking is performed, the joining of the metal plates 1 and 5 for both frames becomes stronger and the deviation in the plate thickness direction is completely prevented.

[0013]

[Embodiment 1] FIG. 1 shows a first embodiment of a joint structure of a metal plate for a frame body of the present invention, which is an example of making a filter similar to that shown in FIG. In this case, the joining edges 2 of the metal plates 1 and 5 for the frame body having the thicknesses of 1 and 2 mm used for assembling the frame 20,
6, the convex portion 3, the concave portion 4, the convex portion 7, and the concave portion 8 are formed. The shapes of the convex portions 3 and the concave portions 4 and the shapes of the convex portions 7 and the concave portions 8 are patterns opposite to each other, and as shown in FIG.
Locking protrusions 10 and 11 having a wide lateral width are formed in the recesses 4 and 8 into which the protrusions 3 and 7 are fitted, and the locking protrusions 12 and 13 are narrower than the locking protrusions 10 and 11. To form.

The convex portions 3 and the concave portions 4 formed on the frame metal plate 1 and the convex portions 7 and the concave portions 8 formed on the frame metal plate 5 are
When they are fitted to each other, they can be brought into close contact with each other without any gap, and when they are fitted, the positions where the corners of the metal plates 1 and 5 for the frame body are fitted are determined. The projections 3, the recesses 4 and the projections 7, and the recesses 8 on the frame metal plates 1 and 5 can be formed by punching or wire cutting.

When the convex portions 3, the concave portions 4 and the convex portions 7 and the concave portions 8 are formed on the joint edges 2 and 6 of the frame body metal plates 1 and 5 in this manner, the convex portions 3 are formed in the concave portions 8 and the concave portions 4 are formed. Are press-fitted into the convex portions 7 so that they are fitted into each other. This fitting can be performed by hitting with a hammer or pressing with a pressing machine or the like.

After the frame metal plates 1 and 5 have been joined in this manner, the joining edges 2 and 6 are struck by a punch or a hammer as shown in FIG. The convex portion 3 and the convex portion 7 of the metal plate 5 are pressed and pushed outward. At this time, if there are burrs or the like on the convex portions 3, the concave portions 4, the convex portions 7, and the concave portions 8, they can be crushed to be flat. Further, if there is a gap in the joint portion, the gap can be filled by extending the thickness of the metal plates 1 and 5. Further, by extending the meat of the metal plates 1 and 5 toward the metal plates 1 and 5 facing each other, it is possible to eliminate the deviation of the metal plates 1 and 5 in the thickness direction.

The same operation is performed on other metal plates for assembling the filter frame 20, and finally the rectangular frame 20 as shown in FIG. 4 is assembled. Then, a metal net 22 is attached to the inside of the frame 20 to complete the filter of FIG.

[0018]

[Embodiment 2] FIG. 2 shows a second embodiment of the joining structure of the metal plates for the frame body of the present invention, which is an example of forming a filter frame as in the case of the first embodiment. In this embodiment, a third metal plate 16 having caulking holes 15 is applied to the back side of the joint portion of the frame 20 produced in the first embodiment, that is, the back side of the joint portion of the frame metal plates 1 and 5, A part of the joint portion of the first and second frame metal plates 1 and 5 is pushed out to the inside of the caulking hole 15 with a punch or the like. Then, the protrusion 17 is pushed into the caulking hole 15 of the metal plate 16, and the protrusion 17 is folded back to the outside of the caulking hole 15 for caulking (burring).

In the frame 20 thus manufactured, the frame 2
It is possible to insert bolts and pins for fixing the frame 20 into the caulking hole 15 formed on the edge of 0,
It is convenient.

[0020]

EFFECTS OF THE INVENTION The joining structure of the metal plate for a frame according to claim 1 of the present invention has the following effects. ． Workability is good because the joining is completed by simply press-fitting the convex portions 3, the concave portions 4 and the convex portions 7, and the concave portions 8 formed on the joint edges 2 and 6 of the metal plates 1 and 5 for the frame body to each other. Suitable for mass production of products. ． Since the frame body metal plates 1 and 5 are joined by the engagement of the convex portions 3 and the concave portions 4 with the convex portions 7 and the concave portions 8, there is no displacement during the joining. ． Even if the joining portion is welded, the dimensions are not disturbed because the convex portions 3 and the concave portions 4 are engaged with the convex portions 7 and the concave portions 8.

According to the second aspect of the present invention, in the structure for joining the metal plates for the frame body, even if the joined metal plates for the frame body 1, 5 are pulled in the direction opposite to the joining direction, the joining of the both is not released, so that it is safe. Is.

The joint structure of the metal plate for a frame according to claim 3 of the present invention has the following effects. ． If there are burrs or the like on the convex portion 3, the concave portion 4, the convex portion 7, and the concave portion 8, they can be crushed to be flat. ． If there is a gap at the joint, it is possible to fill the gap by extending the thickness of the metal plates 1 and 5. ． By extending the meat of the metal plates 1 and 5 toward the metal plates 1 and 5 facing each other, it is possible to eliminate the deviation of the metal plates 1 and 5 in the thickness direction.

The joining structure of the metal plate for a frame according to claim 4 of the present invention has the following effects. ． Since the metal plates 1 and 5 are crimped to the metal plate 16, the joining of the metal plates 1 and 5 becomes more reliable. ． Since the caulking hole 15 can be used as a hole for mounting a bolt or a pin, it is convenient.

[Brief description of drawings]

FIG. 1 is a first embodiment of a joint structure of a metal plate for a frame body of the present invention, (a) is a plan view of a joint portion, and (b) is a sectional view taken along the line AA of the joint portion.

FIG. 2 is a second embodiment of the joining structure of the metal plate for the frame body of the present invention, (a) is a plan view of the joining portion, and (b) is a sectional view taken along the line AA of the joining portion.

FIG. 3A is an explanatory view showing a state of pressurizing a joint portion of metal plates, and FIG. 3B is an explanatory view showing a state of expansion of meat of the pressed metal plate.

FIG. 4 is a perspective view of a conventional filter.

FIG. 5 is an explanatory view showing an example of a conventional joining structure of metal plates for frames.

FIG. 6 is an explanatory view showing another example of the joining structure of the metal plates for frames of guns and the like.

[Explanation of symbols]

 1 Metal Plate for First Frame 2 Joint Edge of Metal Plate for First Frame 3 Convex Part of Metal Plate for First Frame 4 Recessed Part of Metal Plate for First Frame 5 Second Frame Metal plate 6 Bonding edge of second metal plate for frame 7 Convex portion of second metal plate for frame 8 Recessed portion of second metal plate for frame 10 Locking first metal plate for frame Protrusion 11 Locking protrusion of second metal plate for frame 12 Locking portion of first metal plate for frame 13 Locking portion of second metal plate for frame 15 Caulking hole 16 Third Metal plate 17 Projection

Claims (4)

[Claims] 1. A joining edge (2) of a metal plate (1) for a first frame body.
In the joining edge (6) of the second frame metal plate (5), which is formed with the convex portion (3) and the concave portion (4) and is joined to the first frame metal plate (1), The convex portion (7) and the concave portion (8) are formed in a pattern opposite to that of the convex portion (3) and the concave portion (4), and both joint edges (2) are formed.
The metal plates (1) and (5) for both frames are joined by fitting and press-fitting the convex portion (3), the concave portion (4) and the convex portion (7), and the concave portion (8) of (6). The joining structure of the metal plates for the frame, which is characterized in that 2. Protrusions (3) (7) are formed with locking projections (10) (11) having a wide width, and recesses (4) (to which the protrusions (3) (7) fit. The joint structure for a metal plate for a frame according to claim 1, wherein the locking projections (10) (11) are formed in the locking projections (10) (11) having a width narrower than that of the locking projections (10) (11). . 3. A convex portion (3) of the first frame metal plate (1) and a convex portion (7) of the second frame metal plate (5) which are fitted to each other are pressurized. The joint structure for a metal plate for a frame according to claim 1 or 2, wherein the joint structure is formed by pushing the metal plate outward. 4. A third metal plate (3) having a caulking hole (15) on the back side of the joint between the first frame metal plate (1) and the second frame metal plate (5). 16), and the protruding portion (17) obtained by pushing out a part of the joint portion of the first and second frame metal plates (1) and (5) to the back side is provided with the caulking hole (15) of the metal plate (16). ), The protrusion (17) is folded back to the outside of the caulking hole (15) and caulked, and the metal plate for a frame according to claim 1 or 2 or 3. Junction structure.