JP3197042U - Caulking punch and attachment machine for snap fastener installation - Google Patents

Abstract

The present invention provides a snap fastener mounting crimping punch and a mounting machine capable of preventing the occurrence of a male and female snap fitting failure and a caulking stop failure, and further reducing the thickness of the male and female snaps. A tip end surface 12 of a columnar shaft portion 11 that abuts on a tip end of a protrusion 1a of a rivet member is formed at a conical portion 13 formed in the center and around the conical portion 13, and an annular shape surrounding the conical portion 13. The inner surface of the annular protrusion 14 is formed into a tapered surface that increases in diameter from the proximal end side toward the distal end side of the annular protrusion 14. [Selection] Figure 3

Description

  In the present invention, for example, in a state where a sheet-like member (flexible base material) such as a fabric is disposed between a rivet member held by a receiving tool and a fitting member held by the driving tool, By moving closer to the receiving tool, the guide punch mounted on the driving tool presses the fitting member against the sheet-like member, and the protrusion of the rivet member is pierced into the sheet-like member and inserted into the through-hole of the fitting member. Snap fasteners that squeeze the rivet member and the fitting member into a state sandwiching the sheet-like member by striking the tip end portion of the projection with a caulking punch mounted on the driving tool and expanding the diameter thereof. The present invention relates to an attaching machine and the caulking punch applicable to the attaching machine.

  In the conventional snap fastener attaching machine, as shown in FIG. 6A, a conical recessed portion 52 is formed at the center of the tip end surface of the cylindrical shaft portion 51 constituting the caulking punch. As shown in FIGS. 6A and 6B, a guide punch (not shown) presses the fitting member 53 against the sheet-like member 54 to pierce the projection 56 of the rivet member 55 into the sheet-like member 54. In the state of being inserted through the through hole 57 of the fitting member 53, the tip of the projection 56 is fitted into the recessed portion 52 of the cylindrical shaft portion 51, the shaft core of the projection 56 is held at a fixed position, and the projection 56 is positioned. However, the cylindrical shaft portion 51 is lowered and the tip end portion of the protrusion 56 is struck so that the caulking is surely performed (see Patent Document 1).

  6A and 6B show the manufacturing process of the male snap 58, the female snap 59 (see FIG. 6C) is manufactured in the same manner.

Utility model registration No. 2592699

  By the way, in recent years, further thinning of the snap fastener has been desired. When the male and female snaps are made thinner, as shown in FIG. 6 (C), when the male and female snaps are fitted, the elongated central portions of the protrusions 56 interfere with each other, There is a problem that poor alignment occurs. With the aim of avoiding this problem of poor fitting, the caulking is stopped when the recessed portion 52 of the front end surface of the cylindrical shaft portion 51 is shallowed or eliminated so that the center portion of the projection 56 is shortened. The positioning of the projection 56 at that time becomes insufficient, and there is a risk of hindering the caulking.

  The present invention has been made in consideration of the above-mentioned matters, and the purpose of the present invention is to prevent the occurrence of male and female snap fitting failure and caulking failure, and to make the male and female snap thin. An object of the present invention is to provide a caulking punch and an attaching machine for attaching a snap fastener.

  In order to achieve the above object, a crimping punch for attaching a snap fastener according to the present invention includes a conical portion in which a tip end surface of a columnar shaft portion that contacts the tip of a projection of a rivet member is formed at the center, and a periphery of the conical portion. And an annular protrusion that surrounds the conical portion (claim 1).

  In the caulking punch for attaching the snap fastener, an inner peripheral surface of the annular protrusion may be formed as a tapered surface whose diameter increases from the proximal end side to the distal end side of the annular protrusion.

  On the other hand, in order to achieve the above object, the snap fastener attaching machine according to the present invention has a sheet-like member disposed between the rivet member held by the receiving tool and the fitting member held by the driving tool. When the guide punch mounted on the driving tool presses the fitting member against the sheet-like member as the driving tool moves closer to the receiving tool, the protrusion of the rivet member breaks through the sheet-like member and for fitting The rivet member and the fitting member are clamped in a state of sandwiching the sheet-like member by penetrating the through-hole of the member and striking the tip end portion of the projection with a caulking punch equipped in the driving tool to expand the diameter. A snap fastener attaching machine configured as described above, wherein the caulking punch for attaching a snap fastener according to claim 1 or 2 is used as the caulking punch. That (claim 3).

  According to the present invention, a snap fastener mounting caulking punch and a mounting machine can be obtained that can prevent the occurrence of male and female snap fitting failure and caulking stop failure, and can also reduce the thickness of male and female snaps.

  That is, in the snap fastener mounting caulking punch of the invention according to each claim of the present application, when the columnar shaft portion strikes the rivet member, the protrusion of the rivet member is the outermost groove of the annular groove formed between the conical portion and the annular protrusion. By being held in a state where it is positioned at the back, the rivet member can be properly crimped.

  In the caulking punch for attaching the snap fastener of the invention according to claim 2, by making the inner peripheral surface of the annular projection tapered, the range in which the projection of the rivet member can be positioned at the time of caulking is stopped, and the caulking is accordingly increased. The success rate of stopping will increase.

It is a vertical side view which shows roughly the structure of the principal part of the snap fastener attaching machine which concerns on one embodiment of this invention. It is a vertical side view which shows roughly the structure of the principal part of the said snap fastener attachment machine in the case of hold | maintaining a female type member for a fitting. It is a partial expanded vertical side view which shows roughly the principal part of the protrusion of a crimping punch and a rivet member. It is a partial expansion perspective view which shows roughly the principal part of the protrusion of a crimping punch and a rivet member. It is a vertical end view which shows roughly the fitting state of a male and female snap. (A) And (B) is explanatory drawing which shows the conventional snap fastener attachment method, (C) is a vertical end view which shows the fitting state of the snap of the conventional sexes.

  Embodiments of the present invention will be described below with reference to the drawings.

  The snap fastener attaching machine shown in FIG. 1 includes a receiver 2 that holds the rivet member 1 so that the protrusion 1a faces upward, and a driving tool 3 that is driven up and down with respect to the receiver 2. The driving tool 3 includes an elevating member 4 that moves up and down with respect to the receiving device 2 by power of an elevating drive device (not shown), and a caulking punch that is fixed to the elevating member 4 with a set bolt 5 (a caulking punch for attaching a snap fastener). An example) 6, a cylindrical shaft-shaped guide punch 7 slidable up and down with respect to the caulking punch 6, and a spring 8 as a biasing means for slidingly biasing the guide punch 7 downward.

  The guide punch 7 is configured to hold a male-type or female-type fitting member 9 having a through hole 9a for inserting the projection 1a of the rivet member 1 in the center. Here, the guide punch 7 shown in FIG. 1 has a shape suitable for holding the male fitting member 9, and the snap pin 7A is extracted to hold the female fitting member 9. If it replaces with the guide punch 7 which has the shape suitable for this, the female-type fitting member 9 can be hold | maintained (refer FIG. 2). That is, when the male snap is formed, the guide punch 7 that holds the male fitting member 9 is used, and when the female snap is formed, the guide punch 7 that holds the female fitting member 9 is used.

  Then, in a state where the sheet-like member 10 such as a fabric is disposed between the rivet member 1 held by the receiving tool 2 and the fitting member 9 held by the driving tool 3, the driving tool 3 is placed on the receiving tool 2. Accordingly, when the driving tool 3 descends, the guide punch 7 mounted on the driving tool 3 presses the fitting member 9 against the sheet-like member 10. As a result, the projection 1a of the rivet member 1 breaks through the sheet-like member 10 and further penetrates the through hole 9a of the fitting member 9, and the tip of the projection 1a is struck with a caulking punch 6 to expand its diameter. By doing so, the rivet member 1 and the fitting member 9 are caulked and stopped with the sheet-like member 10 sandwiched therebetween.

  The rivet member 1 and the fitting member 9 are formed of a synthetic resin such as polyacetal or nylon.

  As shown in FIGS. 3 and 4, the caulking punch 6 is configured such that a front end surface 12 of a cylindrical shaft portion (an example of a columnar shaft portion) 11 abuts on a protrusion 1 a of the rivet member 1. A conical portion 13 formed in the center, an annular protrusion 14 formed around the conical portion 13 and surrounding the conical portion 13, and an annular outer shell formed around the annular protrusion 14 and surrounding the annular protrusion 14. 15.

  Here, the annular protrusion 14 and the annular outer shell 15 are provided concentrically with the conical portion 13 in a bottom view, and the lower ends (tips) of the portions 13, 14, and 15 are perpendicular to the axis of the cylindrical shaft portion 11. It is comprised so that it may be located on the same plane. Further, a flat portion is formed at the lower end (top) of the annular protrusion 14, and the inner peripheral surface of the annular protrusion 14 and the inner peripheral surface of the annular outer shell 15 extend from the base end side (upper side) to the distal end side (lower side). On the other hand, the outer peripheral surface of the annular protrusion 14 is formed as a tapered surface that decreases in diameter from the base end side (upper side) to the distal end side (lower side).

  The height H of the conical portion 13 is 0.3 mm to 0.5 mm, and the annular protrusion 14 and the annular outer shell 15 have the same height as the conical portion 13. That is, the inner annular groove 16 formed between the conical portion 13 and the annular protrusion 14 on the front end surface 12 of the crimping punch 6 and the outer annular groove 17 formed between the annular protrusion 14 and the annular outer shell 15 are: The depth is the same.

  The diameter D of the conical portion 13 is 0.3 mm to 0.9 mm, and the width W of the inner annular groove 16 (the inner diameter of the lower end of the annular protrusion 14) is 1.1 mm to 1.7 mm.

  Therefore, when the caulking punch 6 (cylindrical shaft portion 11) strikes the protrusion 1a of the rivet member 1, the tip of the protrusion 1a is guided to the outer peripheral surface of the conical portion 13 or the inner peripheral surface of the annular protrusion 14, and the inner annular groove Since the rivet member 1 and the fitting member 9 are held in a state of being positioned at the innermost part (upper part) of the 16, the caulking is favorably performed.

  Further, in the conventional example shown in FIGS. 6A to 6C, the center of the protrusion 56 of the rivet member 55 extends long, and there is a risk that a fitting failure may occur when the male and female snaps are fitted. Since the rivet member 1 in the crimped state is not formed with a long extending portion, as shown in FIG. 5, the above-described poor fitting is unlikely to occur, and the male and female snaps can be made thinner accordingly. It becomes possible.

  It should be noted that the present invention is not limited to the above-described embodiment, and can be variously modified and implemented without departing from the gist of the present invention. For example, the following modifications can be given.

  In the example shown in FIGS. 3 and 4, the inner peripheral surface of the annular protrusion 14 is formed in a tapered shape, so that when the caulking punch 6 strikes the protrusion 1 a of the rivet member 1, the tip of the protrusion 1 a is the tip of the annular protrusion 14. If it is located in the range guided by the inner annular groove 16 on the inner side, the positioning of the protrusion 1a can be performed reliably. That is, by making the inner peripheral surface of the annular protrusion 14 into a tapered shape, the range in which the protrusion 1a of the rivet member 1 can be positioned at the time of crimping can be expanded, and the success rate of crimping is increased accordingly. . However, for example, when the centering accuracy of the protrusion 1a at the time of caulking is high and the protrusion 1a always comes into contact with the conical portion 13, the inner peripheral surface of the annular protrusion 14 does not need to be tapered. A cylindrical surface extending straight may be used.

  Moreover, in the example shown in FIG.3 and FIG.4, although the flat part is provided on the top of the cyclic | annular protrusion 14, it is not necessary to provide this flat part.

  In the example shown in FIG. 3, the conical portion 13, the annular protrusion 14, and the lower end (tip) of the annular outer shell 15 formed on the distal end surface 12 of the caulking punch 6 are located on the same plane. The conical portion 13 may protrude from the annular protrusion 14 and the annular outer shell 15. In the example shown in FIG. 3, the inner annular groove 16 and the outer annular groove 17 have the same depth. However, the present invention is not limited to this. For example, the outer annular groove 17 is shallower than the inner annular groove 16. May be.

  In the example shown in FIGS. 3 and 4, the annular outer shell 15 is formed outside the annular protrusion 14 on the front end surface 12 of the crimping punch 6, but the present invention is not limited to this, and the annular outer shell 15 may not be formed. Good.

  The caulking punch 6 (cylindrical shaft portion 11) shown in FIGS. 3 and 4 is not limited to that used in the snap fastener attaching machine shown in FIG. 1, and may be, for example, a multiplier-like caulking punch.

  Needless to say, the modifications described in this specification may be combined as appropriate.

DESCRIPTION OF SYMBOLS 1 Rivet member 1a Protrusion 2 Receiving tool 3 Driving tool 4 Lifting member 5 Set bolt 6 Caulking punch 7 Guide punch 7A Snap pin 8 Spring 9 Fitting member 9a Through-hole 10 Sheet-like member 11 Cylindrical shaft part 12 Tip surface 13 Cone part 14 Annular projection 15 Annular outer shell 16 Inner annular groove 17 Outer annular groove 51 Columnar shaft portion 52 Recessed portion 53 Fitting member 54 Sheet-like member 55 Rivet member 56 Projection 57 Through hole 58 Male snap 59 Female snap D Conical diameter H Cone Part height W inner annular groove width

Claims (3)

  For attaching a snap fastener having a conical portion formed at the center of a columnar shaft portion that abuts on the tip of the protrusion of the rivet member and an annular protrusion formed around the conical portion and surrounding the conical portion Caulking punch.   2. The snap fastener mounting caulking punch according to claim 1, wherein an inner peripheral surface of the annular protrusion is formed into a tapered surface whose diameter increases from a proximal end side to a distal end side of the annular protrusion.   In the state where the sheet-like member is disposed between the rivet member held by the receiving tool and the fitting member held by the driving tool, the driving tool moves toward the receiving tool as the driving tool moves closer to the receiving tool. When the equipped guide punch presses the fitting member against the sheet-like member, the projection of the rivet member breaks through the sheet-like member and penetrates the through-hole of the fitting member, and the crimping punch equipped in the driving tool with the tip of the projection The snap fastener attaching machine is configured such that the rivet member and the fitting member are caulked and fixed in a state where the sheet-like member is sandwiched by striking and expanding the diameter of the caulking punch. A snap fastener attaching machine in which the caulking punch for attaching the snap fastener described in 1 is used.

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