JPH0211710B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a rose set plate used for attaching a knob to the inside and outside of a door to be opened and closed, and a product thereof.

An example of attaching a knob to the inside and outside of a door, which has been conventionally done, will be explained below with reference to FIG.
First, the case 2 equipped with the latch bolt 1 is fitted into a hole drilled in the opening/closing end side of a door (not shown), and then the case 2 is fixed to the door with the screw 4 via the front 3. . Next, the rose set plate 6, which has two mounting legs 5 screwed on the inside of the tip, is attached to the outside rose set plate 7 by crimping or the like.
Further, the rose 7 is fixed to the outer knob 9 to which the shaft core 8 having a rectangular cross section is fixed, by an appropriate method so that the shaft core 8 and the outer knob 9 are rotatable. Next, the shaft core 8 is inserted into the operation hole 10 of the case 2, and both mounting legs 5 are inserted into the door, so that the shaft core 8 and the mounting leg 5 protrude to the opposite side of the door, and The knob 12 and the inner rose 11 are fixed in the same manner as the outer rose 7 and the outer knob 9 are fixed, and the shaft center 8 is inserted into the center of the inner knob 12 (not shown), and then both are fixed. Connect the tips of the mounting legs 5, 5 to both mounting holes 1 of the inner rose 11.
3, 13, fix the mounting leg 5 and the inner rose 11 with the bolt 14, and then tighten the inner and outer knobs 9, 12.
Attach to the door.

The inner and outer roses 7 and 11 are firmly attached to both sides of the door via the rose set plate 6.
The outer knobs 9 and 12 are held so as to rotate simultaneously via an axis 8.

Further, the latch bolt 1 is moved in and out by the rotation of the inner and outer knobs 9 and 12, thereby locking and releasing the door.

The rose set plate 6 used for fixing the inner and outer roses 7, 11 has both mounting legs 5, 5 which are relatively long, so the mounting legs 5, 5 and the base 15 are formed integrally by die-casting, or It was constructed by welding or crimping two separately manufactured mounting legs 5, 5 to the base 15 and fixing them. however,
The former method requires a lot of technology and manufacturing costs, which makes the product expensive, while the latter method requires a lot of man-hours, so it has the same drawbacks as the former, making the product relatively expensive.

The present invention has been made to solve the above problems, and provides an extremely inexpensive rose set plate by integrally forming the base and the mounting legs from a disc-shaped member made of malleable metal. That is.

An embodiment of the present invention will be explained below with reference to FIG. 2. In the first step, the disk-shaped member 20 is made by cutting a metal plate of appropriate thickness made of malleable iron, stainless steel, aluminum, etc. using a press, and then in the second step, the disk-shaped member A substantially oblong hole 21 having an appropriate area is bored in the center of the hole 20 .

Next, in the third to seventh steps, two places on the diameter line of the member 20 passing through the short axis of the hole 21 and symmetrical to the center are successively cold-deep drawn pressed to form the shaft cylinder part in the member 20. 22 is integrally molded.

Subsequently, in the eighth step, the double shaft cylindrical portions 22, 22
After forming the folded part 23 by folding the tip of the folded part 23 inward by an appropriate length by press working, in the ninth step, the bottom part 24 of the folded part 23 is cut and a circular hole 25 is formed in the center of the member 20. to be drilled.

Furthermore, in the tenth step, the member 20 and the hole 25
After forming the base 28 by bending the peripheral edge of the shaft by an appropriate width to the opposite side of the shaft cylinder part 22 and providing the edges 26 and 27, the shaft cylinder part 2 is bent in an eleventh step.
The rose set plate 30 is completed by screwing it onto the peripheral wall of the folded portion 23 of No. 2 and forming the mounting leg 29.

In this case, in the third to seventh steps, the member 20 (steel plate, thickness approximately 0.5 mm) is cold-deep-drawn pressed to form a shaft cylindrical portion 22 (height approximately 30 mm, outer diameter approximately 8 mm) with unconventional dimensions. ) was able to be formed because a substantially oblong hole 21 having an appropriate area was bored in the center of the member 20 in the second step before deep drawing press processing. This hole 2
1 seems to work to facilitate the smooth elongation of the material during deep drawing and to allow the strain that occurs to escape.

Furthermore, since the second to tenth steps can be processed continuously with one machine (for example, a transfer press), the number of man-hours can be significantly reduced and mass production is also possible.

In the above embodiment, in the 10th step, the circular hole 25
Although the edge portion 27 is provided on the base portion 28 by pressing the peripheral edge of the base portion 28 to an appropriate width on the opposite side of the shaft cylindrical portion 22, the edge portion 27 may not be provided depending on the purpose of use.

Since the present invention has the above configuration, it has the following effects.

(1) The base and mounting legs are integrally molded using deep drawing press processing, which significantly reduces material costs and man-hours, and is easier to manufacture than conventional products.
Cost reductions of 30% or more can be achieved.

(2) Mass production is possible.

(3) Dimensional accuracy is better than conventional ones.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the main parts to explain a method of attaching a knob used in a conventional door, and Fig. 2 is a schematic process diagram to explain an embodiment of a method for manufacturing a rose set plate according to the present invention. It is. 20...Disk-shaped member, 21...Substantially oblong-shaped hole,
22... Shaft tube part, 23... Folding part, 24... Bottom part, 25
...Circular hole, 26, 27...Edge, 28...Base, 29...
Mounting leg, 30...Rose set plate.

Claims (1)

[Scope of Claims] 1. A press cutting step of forming a disk-shaped member having a substantially oblong hole having an appropriate area in the center from a malleable metal plate, and a step of cutting a disk-shaped member having a substantially oblong hole having an appropriate area in the center, and a deep drawing press process of integrally molding a biaxial cylindrical portion that is symmetrical with respect to the center on the diameter line of the member;
a press working step of forming a folded part by folding the tip of the double shaft cylindrical part inward; a cutting process of the deformed hole to form a circular hole at the bottom of the folded part and the center of the member; and a cutting step of the deformed hole. and a method for manufacturing a rose set plate comprising the steps of: a pressing step of bending the circular hole or the peripheral edge of only the member to the opposite side of the shaft cylinder portion; and a step of screwing the peripheral wall of the folded portion. 2. A circular base with either an edge formed in the center or a circular hole without an edge, and an edge bent to an appropriate width at the periphery, and on the diameter line of the base. A rose set plate comprising both mounting legs screwed into folded portions of a shaft cylinder portion, which are integrally formed with the base portion symmetrically with respect to the center.