JP2009062802A - Striker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To strengthen a connection part between a mounting seat part and an engaging part while eliminating its dispersion by forming a striker comprising the mounting seat part and the engaging part of engaging structure, integrally from one blank by consistent cold forging work. <P>SOLUTION: The striker 1 is constituted by integrally forming the square mounting seat part 2 having through holes 2a, 2a for fixing bolts at both ends, and the engaging part 3 of quadrangular frame shape from the side view having a quadrangular blanked engaging hole 3a and projecting forward from the center part of the mounting seat part 2. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a striker mainly used as one part in an automobile hood or door opening / closing lock device.

Technical background

  Conventionally, this type of striker has, as shown in FIGS. 13 and 14, for example, a steel mounting seat 10 having through holes 10a and 10a for fixing bolts at both ends and caulking holes at the center upper and lower parts. And an engagement rod 11 having a round bar made of steel bent into a U shape so that both ends thereof coincide with the caulking holes of the mounting seat plate 10 and having flanges 11a and 11a at each end. Thus, both ends of the heated engagement rod 11 are inserted into the caulking holes of the mounting seat plate 10, and the insertion tip portion is caulked from the back side of the mounting seat plate 10 to couple them together.

  The striker is formed by a pair of fixing bolts (not shown) inserted into the through holes 10a and 10a of the mounting seat plate 10 on the base member on the back side of the bonnet, the side surface of the rigid frame on the vehicle body side facing the door, and the like. Used by screwing.

  By the way, according to the above-described conventional striker, the mounting seat plate 10 is manufactured from a steel plate, and the U-shaped engagement rod 11 is manufactured individually from a steel round bar by using respective molding machines. In addition, since the engagement rod 11 is inserted into the mounting seat plate 10 in a heated state and fixed by crimping, the fixing strength of the crimped portion due to the heating is likely to vary, that is, the quality of the thermal crimping itself There was a problem of lack of stability. In addition, the manufacturing process is very complicated and labor-intensive, and not only the manufacturing cost is high, but also a large facility is required. Further, parts management in manufacturing is complicated and troublesome.

  Therefore, in the present invention, a striker composed of a mounting seat portion and an engaging portion having an engaging structure is integrally formed from one blank by a consistent forging operation, and the connection strength between the mounting seat portion and the engaging portion is increased. A striker that can be operated firmly and without variation, and that can be mass-produced easily and can be manufactured at low cost, and that equipment can be miniaturized, and that parts management during manufacture can be easily performed, and its manufacture It is an object to provide a method.

  In order to solve the above-mentioned problem, the invention according to claim 1 of the present application includes a mounting seat portion having through holes for fixing bolts at both ends, a forward projection from the center portion of the mounting seat portion, and an engagement structure. It is characterized by integrally forming an engaging portion having a.

  Further, the invention according to claim 2 of the present application is provided with a mounting seat portion having through holes for fixing bolts at both ends, a forward projecting from the center portion of the mounting seat portion, and a rectangular punching engagement hole. The side view shape is formed integrally with a rectangular frame-shaped engaging portion.

  Moreover, the invention according to claim 3 of the present application has a mounting seat portion having through holes for fixing bolts at both ends, a forward projecting from the center portion of the mounting seat portion, and an engaging head at the tip. A shaft-shaped engaging part is formed integrally.

  Furthermore, the invention according to claim 4 of the present application is a mounting seat portion having through holes for fixing bolts at both ends from one blank in a plurality of forging steps by a multistage forging machine, and a center of the mounting seat portion. An intermediate molded body is formed in a stepwise manner by integrally forming a pre-engagement portion that protrudes forward from the portion and does not have an engagement hole and has a quadrangular shape in a side view, and then a final process in this molding machine Alternatively, as a subsequent process, the pre-engagement portion of the intermediate molded body is punched out from the side surface in a square shape by another press to form an engagement hole, and the engagement portion having a square shape in side view is formed. It is characterized by that.

  According to the invention of claim 1 of the present application, a striker composed of a mounting seat portion and an engaging portion having an engaging structure is separated from one blank into a consistent forging operation by a multistage forging molding machine or the forging operation. It can be formed as a single unit by simply punching with a press machine. This eliminates the need for conventional heat caulking and strengthens the strength of the connecting part between the mounting seat and the engaging part, and eliminates variations. Can provide a high-quality striker. In addition, mass production is easy and can be manufactured at low cost, and the equipment can be downsized, and parts management in manufacturing can be facilitated.

  Further, according to the invention of claim 2 of the present application, a striker composed of a mounting seat portion and an engaging portion having a square frame shape in a side view can be formed from a single blank into a consistent forging operation by a multistage forging molding machine or its It can be formed integrally by simply punching with a separate press machine for forging work, thereby eliminating the need for conventional heat caulking and strengthening the strength of the connecting portion between the mounting seat and the engaging portion. The variation can be eliminated, and a high-quality striker can be provided. In addition, mass production is easy and can be manufactured at low cost, and the equipment can be downsized, and parts management in manufacturing can be facilitated.

  According to the invention of claim 3 of the present application, a striker composed of a mounting seat portion and a shaft-like engagement portion having an engagement head at the tip is formed by consistent forging from a single blank by a multistage forging molding machine. High-quality striker that can be integrally formed by work, and can strengthen the strength of the connecting part between the mounting seat and the engaging part, eliminating the need for conventional heat caulking, and eliminating this variation. Can be provided. In addition, mass production is easy and can be manufactured at low cost, and the equipment can be downsized, and parts management in manufacturing can be facilitated.

  Furthermore, according to the striker manufacturing method of claim 4 of the present application, a striker composed of a mounting seat portion and an engaging portion having a square frame shape in a side view can be consistently forged from one blank by a multistage forging machine. It can be formed as a single unit by simply punching with a separate press to the work or its forging work, which eliminates the need for conventional heat caulking and strengthens the strength of the connecting part between the mounting seat and engaging part. And can be molded without variation. In addition, mass production is easy and can be manufactured at low cost, and the equipment can be downsized, and parts management in manufacturing can be facilitated.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  In FIG. 1, reference numeral 1 denotes a striker used as one part in an automobile bonnet or door opening / closing lock device. As shown in FIGS. 2 to 4, the striker 1 has fixing bolts at both ends on one diagonal line. Square-shaped mounting seat 2 having through holes 2a, 2a for use, and a square punching projecting forward from the other diagonal center of mounting seat 2 A side view shape having the engagement hole 3a is integrally formed with the engagement portion 3 having a square frame shape. In addition, a fillet portion 3b is provided at a base portion that is continuous with the mounting seat portion 2 of the engaging portion 3, and a distal end surface 3c of the engaging portion 3 is formed in an arcuate cross section. In the embodiment shown in the figure, the mounting seat 2 is formed in a square shape. However, the mounting seat portion 2 is not limited to such a shape. For example, a rectangular shape, a rhombus shape, a circular shape, or an oval shape may be used. Of course, it may be a shape.

  According to the striker 1 configured as described above, the striker composed of the mounting seat portion 2 and the engagement portion 3 having a square frame shape in side view is integrally formed from one blank by a consistent forging operation, The strength of the connecting portion between the mounting seat portion 2 and the engaging portion 3 can be strengthened, and variations thereof can be eliminated, and a high-quality striker 1 can be provided. In addition, mass production is easy and can be manufactured at low cost, and the equipment can be downsized, and parts management in manufacturing can be facilitated.

  FIGS. 5-11 show the manufacturing process of the striker of the present invention. In a plurality of forging processes by a multi-stage forging machine (not shown), first, one blank A is used for fixing bolts at both ends. A mounting seat portion 2 having through holes 2a, 2a, and a pre-engagement portion projecting forward from the center portion of the mounting seat portion 2 and having a rectangular shape in a side view without an engagement hole (rectangular lower portion F2) Is formed stepwise, and then, in the final step, the preliminary engagement portion of the intermediate molded body is punched out in a square shape from the side in the lateral direction. The engagement hole 3a is formed, and the engagement portion 3 having a quadrangular shape in side view is formed.

  Specifically, first, as shown in FIGS. 5 (a) and 5 (b), a blank A having a predetermined cross-sectional oval or round shape is upset in the first step, and FIG. 6 (a). , (B), the first molded body B is formed such that the lower portion of the front surface and the rear surface is tapered. In addition, as blank A, what is cut in advance to a predetermined length is sequentially supplied to the forging process and used, for example, a bar having a cross-sectional oval shape supplied by a supply device on the front side of the first process. A cutting step for cutting the material into a predetermined length may be provided, and the blank A cut by this cutting step may be supplied to the forging step and used.

  Next, as shown in FIGS. 7 (a) and 7 (b), the first molded body B is forged in the second step, and comprises a thick upper portion C1, an intermediate inclined portion C2, and a thin rectangular lower portion C1. A second molded body C is formed.

  Thereafter, as shown in FIGS. 8A and 8B, the second molded body C is forged in the third step to form a third molded body D composed of a circular head D1 and a rectangular lower part D2.

  Thereafter, as shown in FIGS. 9 (a) and 9 (b), a square-shaped head E1 whose corners are chamfered by punching the circular head D1 of the third molded body D in the fourth step, and the head The 4th molded object E which consists of the square-shaped lower part E2 extended below from the part E1 is formed.

  Further, as shown in FIGS. 10 (a) and 10 (b), punching is performed on the left and right diagonal ends of the rectangular head E1 in the fourth molded body E in the fifth step, and the head F1 is formed. A fifth molded body (intermediate molded body) F having through holes F3 and F3 for fixing bolts and integrally including a rectangular lower portion F2 extending downward from the head F1 is formed.

  After that, as shown in FIGS. 11 (a) and 11 (b), the fifth molded body F is inverted by 90 degrees in the final step, and after changing the forging direction, the rectangular lower portion F2 is centered from the side surface direction. A rectangular engagement hole 3a is formed by punching out the portion into a square shape. Accordingly, as shown in FIG. 11 (b) and FIGS. 1 to 4, the rectangular mounting seat 2 having through holes 2a and 2a for fixing bolts at both diagonal ends, and the mounting seat 2 A striker 1 is formed by projecting forward from a central portion on the other diagonal line and integrally engaging with an engagement portion 3 having a quadrangular punching engagement hole 3a and a quadrangular frame shape in side view. be able to.

  The punching operation of the engagement hole 3a of the engagement portion 3 in the striker 1 is preferably performed in series in the final process of the multistage forging machine as in the above-described embodiment. Of course, it is possible to mold up to the fifth molded body F with a molding machine, and then perform the punching operation of the engagement hole 3a with another press machine in a subsequent process.

  According to the striker manufacturing method configured as described above, the striker 1 including the mounting seat portion 2 and the engagement portion 3 having a square frame shape in a side view can be integrated from a single blank by a multistage forging machine. Can be formed integrally by simply punching with a separate press to the forging operation, thereby eliminating the need for the conventional heat caulking process. It can be formed with strong strength and no variation. In addition, mass production is easy and can be manufactured at low cost, and the equipment can be downsized, and parts management in manufacturing can be facilitated.

  FIG. 12 shows another embodiment of the striker. The striker 1 ′ includes a mounting seat portion 2 ′ having through holes 2a ′ and 2a ′ for fixing bolts at both ends, and a mounting seat portion 2 ′. And a shaft-like engaging portion 3 'having an engaging head 3a' at the tip thereof.

  Also in the striker 1 ′ configured as described above, as in the case of the striker 1 of the previous embodiment, the shaft-like engaging portion 3 ′ having the mounting seat portion 2 ′ and the engaging head portion 3 a ′ at the tip end. The striker consisting of the following can be integrally formed from a single blank by a consistent forging operation to increase the strength of the connecting portion between the mounting seat portion 2 'and the engaging portion 3', and eliminate the variation. And a high-quality striker 1 'can be provided. In addition, mass production is easy and can be manufactured at low cost, and the equipment can be downsized, and parts management in manufacturing can be facilitated.

  It is a perspective view of the striker which concerns on this invention.   It is a front view of the striker.   It is a top view of the striker.   It is a side view of the striker.   It is a front view of the blank used as the forging material of the striker.   It is explanatory drawing of the 1st molded object by which the upsetting process was carried out at the 1st process.   It is explanatory drawing of the 2nd molded object shape-molded by the 2nd process.   It is explanatory drawing of the 3rd molded object shape-molded by the 3rd process.   It is explanatory drawing of the 4th molded object stamped by the 4th process.   It is explanatory drawing of the 5th molded object stamped by the 5th process.   It is explanatory drawing at the time of stamping in a final process and forming a final molded product.   It is a perspective view which shows another embodiment of a striker.   It is conventional explanatory drawing.   It is the same front view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Striker 1 'Striker 2 Mounting seat part 2' Mounting seat part 2a Through-hole 2a 'Through-hole 3 Engagement part 3' Engagement part 3a Engagement hole 3a 'Engagement head

Claims (4)

  A mounting seat portion having through holes for fixing bolts at both ends and an engaging portion protruding forward from the center portion of the mounting seat portion and having an engaging structure are formed integrally. striker.   A mounting seat portion having through holes for fixing bolts at both ends, and an engagement portion projecting forward from the center portion of the mounting seat portion and having a quadrangular punching engagement hole in the shape of a square frame A striker characterized by being formed integrally.   A mounting seat portion having through holes for fixing bolts at both ends and a shaft-shaped engaging portion that protrudes forward from the center portion of the mounting seat portion and has an engaging head at the tip are integrally formed. A striker characterized by   A mounting seat having through holes for fixing bolts at both ends from one blank in a plurality of forging processes by a multistage forging machine, and projecting forward from the center of the mounting seat and having an engagement hole An intermediate molded body formed by integrally molding a pre-engagement portion having a rectangular shape in a side view is formed in stages, and then the intermediate molded body is formed by another press as a final process or a subsequent process in this molding machine. A method of manufacturing a striker, characterized in that an engagement hole is formed by punching a central portion of the preliminary engagement portion from the side surface in a square shape to form an engagement portion having a square shape in a side view.

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