JPS59223571A - Hinge member of hood, lid and suchlike for automobile and manufacturing method thereof - Google Patents

Abstract

PURPOSE:To secure a hinge member that has no torsion at all, by forming the hinge member with a press or a bender, while molding a U-shaped arm part and a straight shank part together in one lot. CONSTITUTION:Plural sheets of a plate material 1 carrying thickness, width and length as specified are superposed one after another, then formed with a press or a bender in a plate thickness direction from a vertical direction, and a U- shaped arm part 1a and a straight shank part 1b are molded together in one lot. The inner circumferential side, namely, the compressed side of the arm part 1a becomes thick while the outer circumferential side, namely, the pulled side is thin so that there produces torsion anyway. In order to eliminate this torsion, concave prooves 2 and 3 are formed on both side edges of a flat plate surface in each member so as to go along these side edges at the flat surface side by the press.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to hinge members such as automobile hoods and lids manufactured from ΔIL plates, and a method for manufacturing the same.

Conventionally, the arm and the hinge part (which is narrower than the handle part) l'A are described, for example, in Japanese Unexamined Patent Publication No. 816 to 1983, especially in FIG.
A method of punching out a large number of flat plate inserts into shapes having a U-shaped arm r'ilI and a straight handle as shown in the figure, and then performing the required processing, or (see Figure 3-1 of the same publication) As shown in E, the material is punched out from a flat plate in an 11-shape or a dogleg shape to form a straight handle and a U-shaped arm, and the arm is roll-formed or press-formed. A method has been adopted in which the hinge member is manufactured by bending it into an L-shape.1゜However, since both methods are manufactured by punching out a flat plate, the member produces cracks, which must be removed. Although the latter method is superior to the former method in terms of yield when punching a flat plate by multi-puncture, it is impossible to completely eliminate the loss.Furthermore, the latter method (C When processing a straight arm into a U-shape, the inner periphery 11111 +1 receives a compressive force and the outer periphery receives a tensile force, causing distortion and twisting between the inner periphery 11111 and the outer periphery1. In order to release this twist, a method of tempering can be considered, but this is not a preferable method because the equipment and process for this would be complicated.

It is an object of the present invention to provide a hinge part that eliminates the following drawbacks and is free from twisting, and a method for manufacturing the same.

The present invention will be described in detail below based on embodiments shown in the drawings.

Fig. 1 is a perspective view of a hinge plate made by cutting a flat steel plate, flat stainless steel plate, etc. into equal lengths to be used in the present invention. Fig. 2 shows the material shown in Fig. - Fig. 4 is a perspective view of a state in which the plates are stacked and aligned in the thickness direction. Figs. The figure is a side view of each hinge member, and FIG. 5 is a sectional view taken along the line A--A.

Plate 42 with the required thickness, width, and length as shown in Figure 1.
As shown in Figure 2, multiple sheets are arranged and stacked one on top of the other, and pressed and bent in a direction perpendicular to the plate thickness direction (from the direction of the arrow in the figure) to form a U-shape as shown in Figure 8. The shaped arm portion 1a and the straight handle 511h are molded at once. In this case, the inner circumferential side of the +J-shaped arm portion T1, that is, the compression side, has a plate thickness of 1'J<, and the outer circumferential side υ1'', that is, the tension side, is thinner, so that twisting occurs. Let's remove this twist.''
After the second forming, the individual holes are marked with grooves 2 along both side edges of the board surface as shown in Figures 4 and O-5.
3 is provided on the F plate side by pressing.

As described above, the present invention (when L7c wobbles), there is no need to consider the gap caused by cutting out the flat plate, walking movement, etc. as in the conventional case, and it is easy to provide a concave groove along the 111 edge of the flat plate part of the hinge. Through this process, it is possible to obtain a twist-free hinge) < 1 d A2.

[Brief explanation of the drawing]

Figure 1 is a perspective view of the material for manufacturing hinges, and Figure 2 is a perspective view of the material for manufacturing hinges.
The material shown in Figure 1 is stacked 111 tile in the thickness direction.
Figure 8 shows the state in which the hinge layer is made up of a 1-shaped arm part and a straight handle. Figure 4 shows the side surface 1 of the hinge member. Figure 5 is a sectional view taken along the line A--A. l...Material, 1a...U-shaped part, lb straight part, 2.8-concave groove

Claims (1)

[Claims] A U-shaped arm part and a straight handle part are provided by bending a plate material of the required size in a direction perpendicular to the thickness direction of the plate material. A plurality of elongated plates with the desired dimensions are stacked in the thickness direction, and the U-shaped arm and straight handle are integrated by pressing or bending in a direction perpendicular to the thickness direction. After forming, grooves along both sides of the plate surface are formed by pressing in each molding section.