JP6289199B2 - Mounting device for latch - Google Patents

Description

  More particularly, the present invention relates to an apparatus for attaching a latch to a cloth such as a waist portion of a trouser.

  A latch (the latch is sometimes referred to as a hook and eye) is generally attached to a waist portion of trousers or the like. The hook and eye is generally composed of a hook body having two locking claws and a backing plate having two claw holes, and both the hook body and the backing plate are made of metal. When attaching the hook body to the fabric, generally, the hook body is held by the upper die and the backing plate is held by the lower die, the fabric is placed on the backing plate, and then the upper die is lowered toward the lower die. As a result, the hooking claw of the hook body penetrates the fabric and then passes through the claw hole of the backing plate, and is then crimped by the lower die. Thereby, a hook body is fixed to the front side of cloth. The backing plate is usually sandwiched between a fabric to which the hook body is fixed and another backing fabric.

  An example of a conventional mounting device for a latch is disclosed in Japanese Utility Model Publication No. 3-24572. When the upper die 7 holding the hook body P1 is lowered, the hook metal fitting attachment device is configured such that after the two locking claws of the hook body P1 pass through the cloth C and then pass through the claw holes of the backing plate P2. The two locking claws are bent in the direction in which the two locking claws approach each other by the two curling members 6 of the lower die, whereby the hook body P1 is fixed to the fabric C. The curling member 6 is rotatable about the shaft 5, and when it is pushed down as the upper die 7 is lowered, the curling member 6 abuts on the upper portion of the caulking die 1 that does not move in the vertical direction, thereby free end of the curling member 6. The part rotates so as to be displaced upward. The locking claw is crimped during this rotation.

  Conventionally, the nail holes of the backing plate were rectangular openings. In this case, when the hook claw of the hook body passes through the cloth and then passes through the nail hole, the cloth is easily caught in the nail hole, and there is a problem that wrinkles are generated in the cloth, for example. In order to avoid this, a backing plate is known in which the claw hole is not an opening but a metal thin portion. This thin portion is designed to be pierced by the locking claw when the hook plate is attached to the fabric. However, when the locking claw breaks through the thin metal portion, a so-called burr that protrudes along the direction in which the thin portion is broken is generated, and this burr damages the back fabric or There may be a negative effect of sticking out of the fabric and damaging the user's skin.

No. 3-24572

  The present invention has been made in view of the above-described problems, and provides a mounting device for a latch that can prevent the adverse effects of burrs caused by the locking claws of the hook body breaking through the thin portion of the backing plate. For the purpose.

    In order to solve the above-described problems, according to the present invention, a hook fitting mounting apparatus for mounting a hook body having a locking claw to a fabric using a backing plate having a thin wall portion to be pierced by the locking claw. And a crimping member for crimping the latching claw that has broken through the thin-walled portion, the crimping member having a crimping surface for crimping the latching claw, and the latching claw is thin A portion of the thin wall portion includes a crushing portion that rises with respect to the caulking surface in order to crush the burr against a burr that may be caused by protruding through the portion and projecting to the opposite side of the hook body. An attachment device for a latching metal is provided.

  In the latch mounting apparatus according to the present invention, the hooking claw of the hook body is passed through the cloth, and then the thin portion of the backing plate is pierced, and then the locking claw is moved by the crimping surface of the crimping member. By hooking, the hook body is attached to the fabric together with the backing plate. The burr produced by the hooking pawls of the hook body protruding through the thin wall portion of the backing plate and projecting to the opposite side of the hook body is crushed by the crushed portion of the caulking member.

  In the present invention, the attaching device for the latch metal can be configured as a die itself or a part of the die that holds the backing plate when the hook body is attached to the cloth. The hook body and the backing plate are made of a metal such as an aluminum alloy, a copper alloy, or a nickel alloy.

  In one embodiment of the present invention, the caulking member is rotatable about an axis portion between an initial position and a caulking completion position. In this case, the caulking member caulks the locking claws of the hook body while rotating from the initial position to the caulking completion position. The swaging mechanism of the swaging member is swung by the free end of the swaging member that is moving, for example, as disclosed in Japanese Utility Model Publication No. 3-24572, by striking against a stationary member or the like. Although a mechanism can be mentioned, it is not limited to this.

  In one embodiment of the present invention, the crushing portion rises on both sides of the caulking surface. Here, “both sides of the crimping surface” refers to both sides of the crimping surface in a direction perpendicular to the direction in which the locking claws are crimped, that is, bent. With regard to this point, in one embodiment of the present invention to be described later, referring to FIG. 5, the direction in which the locking claw 14 is crimped is from the front to the back of FIG. The direction perpendicular to the direction in which 14 is crimped is the left and right sides of FIG. Therefore, the crushing portion (side wall) 35 rises from both the left and right sides of the caulking surface 34 in FIG.

  In one embodiment of the present invention, the caulking surface is parallel to one plane including the axis of the shaft portion, and the crushing portion rises on both sides of the caulking surface along the axis. In this case, the caulking surface is set to be parallel to one of the infinite number of planes including the axis of the shaft portion that is the center of rotation of the caulking member. The crushing portion rises on both sides in the direction along the axis (axial direction) with respect to the crimped surface parallel to one plane including the axis.

  In one embodiment of the present invention, the hook body has two locking claws, and the backing plate has two thin portions that are pierced by the two locking claws, respectively. The mounting apparatus includes two caulking members.

  In the present invention, since the crushing portion is provided in the caulking member, the burr generated by the hooking claw of the hook body breaking through the thin portion of the backing plate can be crushed by the crushing portion. It is possible to prevent adverse effects such as damage or damage to the user's skin protruding from the back fabric.

FIG. 1 is a perspective view showing an arrangement state of a hook body and a backing plate immediately before being attached to a cloth. FIG. 2 is a partial cross-sectional side view showing an arrangement state of the hook body and the backing plate immediately before being attached to the fabric. FIG. 3 is an explanatory diagram of a process of attaching the hook body to the cloth, and shows a time point when the hooking claw of the hook body is close to the cloth. FIG. 4 is an explanatory diagram of a process of attaching the hook body to the cloth, and shows a point in time when the hook claw of the hook body breaks through the thin portion of the backing plate. FIG. 5 is a partial cross-sectional side view showing a point in time when the tip of the hook claw of the hook body comes into contact with the crimping surface of the rotating body of the rotating die. FIG. 6 is a partial cross-sectional enlarged view showing a state in which burrs are crushed on the upper surface of the side wall of the rotating body while the locking claw is crimped by the crimping surface of the rotating body. FIG. 7 is an explanatory diagram of a process of attaching the hook body to the cloth, and shows a state where the fastening of the locking claws has been completed.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the drawings. However, the invention is not limited to the embodiments, and modifications and the like can be made within the scope of the claims and the equivalent scope thereof. . 1 and 2 are a perspective view and a partial cross-sectional side view showing an arrangement state of the hook body 10 and the backing plate 20 immediately before being attached to the fabric 1. In the following description, the upper and lower sides are based on the paper surface of FIGS. Further, the front and rear and the left and right are based on the referenced drawings, and in FIG. 2, the right side of FIG. The hook body 10 and the backing plate 20 are constituent parts of a latch, both of which are made of metal. The hook body 10 has a front plate portion 11 having an arcuate front end, a back plate portion 12 parallel to the front plate portion 11, a rear end of the front plate portion 11, and a rear end of the back plate portion 12. A connecting portion 13 that is bent while being bent, and two locking claws 14 that extend downward from the left and right sides of the back plate portion 12 (on the opposite side to the front plate portion 11). The back plate portion 12 has a shorter length from the connecting portion 13 to the front end than the front plate portion 11, and the front end of the back plate portion 12 is linear along the left-right direction. Each locking claw 14 has a claw body portion 14b having a rectangular horizontal cross section, and a pointed tip portion (lower end portion) 14a that tapers from the lower end of the claw body portion 14b. The thickness of the claw trunk 14b in the front-rear direction is larger than the thickness in the left-right direction.

  The backing plate 20 has a front plate portion 21 whose front end is arc-shaped, and slightly protrudes upward from the rear end of the front plate portion 21, and then extends rearward in parallel (that is, horizontally) to the front plate portion 21. A ridge 22 that falls downward and a rear end 23 that extends slightly rearward from the rear end of the ridge 22 are provided. The raised portion 22 extends over the entire length of the backing plate 20. Further, the raised portion 22 includes a front side portion 22 a that is raised from the rear end of the front plate portion 21, and a rear side portion 22 b that is raised from the front end of the rear end portion 23. As can be seen from FIG. 2, the front side portion 22a is inclined upward and the rear side portion 22b is inclined upward and forward. In addition, the rear end portion 23 is also inclined upward and the angle thereof is slightly smaller than that of the front side portion 22a. The raised portion 22 has two thin portions 24 through which the locking claws 14 pass when the hook body 10 is attached to the fabric 1. The thin portion 24 is set as a region including the horizontal cross section of the locking claw 14 and has a rectangular shape in the front-rear direction rather than the left-right direction corresponding to the locking claw 14 thicker in the front-rear direction than the left-right direction. The thin portion 24 is made thinner than the other portions of the hook body 10. The thickness of the thin portion 24 is set to such an extent that the locking claw 14 can be pierced when the hook body 10 is attached to the fabric 1. When the portion corresponding to the thin portion 24 is opened without providing the thin portion 24, the dough is caught from the opening to the lower side of the backing plate 20 by the locking claw 14 when the hook body 10 is attached to the fabric 1. The amount that can be increased. In order to reduce the entrainment of the dough 1, a thin portion 24 is provided. Each thin portion 24 is formed so as to be recessed upward from the lower surface of the raised portion 22, and the upper surface of the thin portion 24 is the same as the upper surface of the raised portion 22.

  When attaching the hook body 10 to the fabric 1, although not shown, the hook body 10 is held by the upper die, the backing plate 20 is held by the lower die, and the fabric 1 is arranged on the backing plate 20. Next, in this embodiment, when the upper die descends toward the lower die, the hooking claws 14 of the hook body 10 penetrate the fabric, and then break through the thin portion 24 of the backing plate 20, and then a rotation described later. The hook body 10 is attached to the fabric 1 by crimping the left and right two locking claws 14 in a direction approaching each other by a moving die (caulking member) 30. It can be said that both the locking claws 14 are thinner in the left-right direction than the front-rear direction in FIG. 2 so that they can bend in the direction approaching each other. There may be cases where the lower die rises relative to the upper die. The attachment device for a latch according to the present invention corresponds to the lower die itself or a part thereof.

  3-7 is explanatory drawing of the process of attaching the hook body 10 to the dough 1. FIG. FIG. 3 shows a point in time when the locking claw 14 of the hook body 10 is close to the fabric 1, and the thin portion 24 of the backing plate 20 shown here is an A line arrow of the left and right thin portions 24 of FIG. 1. It is a visual cross section. Hereinafter, the thin portion 24 shown in FIG. 3 and the locking claw 14 corresponding to the thin portion 24 are referred to as the right thin portion 24 and the locking claw 14. The mounting apparatus for a latch metal, that is, a lower die according to the present invention includes a rotating die 30 as two right and left caulking members for caulking the two left and right engaging claws 14 of the hook body 10. The rotating die 30 corresponds to the curling member 6 described in Japanese Utility Model Publication No. 3-24572. As for the rotating die 30, only the right rotating die 30 is shown in FIG. The rotating die 30 includes a rotating body 32 that can rotate around a shaft portion 31. 5 and 6 are cross-sectional views taken along line B in FIG. As can be seen from these drawings, the rotating body 32 has a caulking surface 34 for caulking the locking claw 14 on its upper side surface (hereinafter referred to as “upper surface”), and the paper surface of the caulking surface 34 in FIGS. It has side walls 35 that rise upward on both the left and right sides (in the axial direction of the shaft portion 31) and serve as a crushing portion for crushing a burr 24a described later. Here, “both sides of the crimping surface” refers to both sides of the crimping surface in a direction perpendicular to the direction in which the locking claws are crimped, that is, bent. Here, the caulking surface 34 is parallel to one plane including the axis of the shaft portion 31, and the crushing portion 35 rises on both sides of the caulking surface 34 along the axis (axial direction). . In this regard, referring to FIG. 5, the direction in which the locking claw 14 is crimped is from the front to the back in FIG. 5, and the direction of the crimping surface 34 is perpendicular to the direction in which the locking claw 14 is crimped. Are the left and right sides of FIG. Therefore, the crushing portion (side wall) 35 rises from both the left and right sides of the caulking surface 34 in FIG. The caulking surface 34 is a flat surface parallel to one plane including the axis of the shaft portion 31, and the side wall 35 has an upper surface 35 a parallel to the caulking surface 34. The caulking surface 34 is set to be parallel to one of the infinite number of planes including the axis of the shaft portion 31 that is the center of rotation of the caulking member 30.

  The rotating die 30 can be rotated clockwise about the shaft portion 31 from the inclined initial position shown in FIG. 3 to the substantially horizontal crimping completion position shown in FIG. The rotation of the rotating die 30 is performed, for example, after the locking claw 14 of the hook body 10 held by the descending upper die is in contact with the fabric 1, and then the descending upper die is moved downward via the fabric 1 and the like. When the rotating die 30 is pushed downward, the stationary portion of the lower die abuts against the free end 32b of the rotating body 32, whereby the free end 32b of the rotating body 32 is relatively lifted upward and rotated. The die 30 can be configured to rotate.

  Next, the process of attaching the hook body 10 to the fabric 1 will be described. When the hook body 10 further descends from the time point of FIG. 3, the locking claws 14 of the hook body 10 penetrate the fabric 1, and then the thin portion 24 of the backing plate 20 is moved downward as shown in FIGS. Break through. At this time, a burr 24a that is rolled down is generated in the thin-walled portion 24 that has been pierced. The burr 24a protrudes on the opposite side of the hook body 10 and occurs on the left and right sides of the rectangular thin portion 24 of the backing plate 20 and on both the front and rear sides of FIG. 2. FIG. 4 shows the burr 24a generated on the left and right sides. 5 shows burrs 24a formed on both the front and rear sides. Since the locking claw 14 is thin in the left-right direction and thick in the front-rear direction, the burr 24a (FIG. 5) on both the front and rear sides is larger than the burr 24a on both the left and right sides (FIG. 4). Since the burr 24a (FIG. 4) on both the left and right sides is small and hardly protrudes below the lower surface of the raised portion 22 of the backing plate 20, it is not targeted for crushing by a crushing portion (side wall) 35 described later.

  The rotating die 30 starts to rotate from the point of FIG. FIG. 5 shows a point in time when the distal end portion 14 a of the locking claw 14 on the right side of the hook body 10 is in contact with the caulking surface 34 of the rotating body 32 of the rotating die 30. At this time, the locking claw 14 is pushed downward by the upper die and is pushed upward by the caulking surface 34 of the rotating body 32 of the rotating die 30 that is rotating clockwise from the state shown in FIG. As a result, the right locking claw 14 is bent toward the left locking claw 14 (not shown) while sliding on the caulking surface 34 of the rotating body 32. That is, the caulking surface 34 comes into contact with the locking claw 14 and the rotating body 32 further rotates, so that the caulking surface 34 moves upward, thereby applying pressure to the locking claw 14, and the pressure is applied. The pawl 14 is deformed so as to be bent. The locking claw 14 is bent in a direction in which the claw trunk portion 14b of the locking claw 14 has a larger thickness in the front-rear direction than the thickness in the left-right direction. The caulking surface 34 at the initial position before the movement is an inclined surface that faces downward as it goes from the shaft portion 31 toward the tip of the rotating body 32, and the locking claw 14 is bent and deformed along the inclined surface. Since it is like this, the crushing part 35 is provided in the both sides with respect to the direction which slides on the caulking surface 34 at the time of caulking of the latching claw 14. That is, the crushing portion 35 is provided on the upper surface of the rotating body 32 so as to be separated along the axial direction of the shaft portion 31, and the crimping surface 34 is provided between the pair of crushing portions 35. Similarly, the left locking claw 14 is also crimped to the right by the left rotating die. FIG. 7 shows a state where the caulking of the right locking claw 14 has been completed.

  FIG. 6 is a partially enlarged cross-sectional view showing a state in which the locking claw 14 is being crimped by the crimping surface 34 of the rotating body 32. As can be seen from this figure, the rotating die 30 is formed by the upper surfaces 35a of the two side walls 35 on the left and right sides of FIG. 6 can be crushed by pressing the burrs 24a on the left and right sides (front and rear in FIG. 2) against the lower surface of the raised portion 22 of the backing plate 20. As a result, it is possible to avoid a situation in which the burr 24a damages the back fabric (not shown) that sandwiches the backing plate 20 with the fabric 1 or protrudes from the back fabric and damages the user's skin. Further, the caulking surface 34 and the two side walls 35 of the rotating body 32 serve as a guide when caulking the locking claws 14 and help to ensure that the left and right locking claws 14 are bent in the mutual direction. The caulking member 30 moves in the vertical direction from the lower side of the backing plate 20 toward the backing plate 20 in addition to rotating around the shaft portion 31, so that the caulking member 30 is moved. Further, the caulking surface 34 can be brought into contact with the locking claw 14 so that the locking claw 14 can be bent. At this time, it is preferable that the caulking surface 34 has a curved surface shape so as to guide the tip 14a in a bending direction from a position where the tip 14a of the locking claw 14 first contacts.

DESCRIPTION OF SYMBOLS 1 Material 10 Hook body 14 Locking claw 20 Backing plate 24 Thin part 24a Burr 30 Rotating die (caulking member)
31 Shaft portion 32 Rotating body 34 Caulking surface 35 Crushing portion (side wall)
35a Upper surface (of the crushed part)

Claims (5)

A hook for attaching the hook body (10) having the locking claw (14) to the fabric (1) using the backing plate (20) having the thin wall portion (24) to be pierced by the locking claw (14). A fastener mounting device,
A caulking member (30) for caulking the locking claw (14) that broke through the thin wall portion (24);
The caulking member (30) has a caulking surface (34) for caulking the locking claw (14),
When the locking claw (14) breaks through the thin wall portion (24), a part of the thin wall portion (24) protrudes to the opposite side of the hook body (10), and the burr (24a) may be generated. (24a) A crushing bracket mounting device (35) including a crushing portion (35) standing up with respect to the caulking surface (34) in order to crush (24a).   The attachment device for a latch according to claim 1, wherein the caulking member (30) is rotatable about an axis portion (31) between an initial position and a caulking completion position.   The attachment device for a latch according to claim 1 or 2, wherein the crushing portion (35) rises on both sides of the caulking surface (34). The caulking surface (34) is parallel to one plane including the axis of the shaft portion (31), and the crushing portion (35) is opposite to the caulking surface (34) in the direction along the axis. The mounting device for a latch according to claim 3 , which rises at the point.   The hook body (10) has two locking claws (14), and the backing plate (20) has two thin portions (24) which are respectively pierced by the two locking claws (14). The mounting device for a latch according to claim 1, wherein the mounting device for a latch is provided with two of the caulking members (30).

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