Synthetic resin rivet components for snap fasteners

Abstract

To provide a synthetic resin rivet member for a snap fastener, which can make the difference in appearance between a button and a sewing thread clearer and can also be expected to improve handling properties. [Solution] A synthetic resin rivet element 1 for a snap fastener has a head 2 and a crimping projection 3 provided in the center of its back surface, and the crimping projection 3 is pierced through the fabric of clothing from the front side and crimped into a through hole in a fitting element located on the back side of the fabric, thereby attaching the fitting element to the fabric. On the surface of the head 2, a three-dimensional pattern 4 resembling sewing thread and a recessed portion 5 resembling a thread hole through which the sewing thread passes are formed, thereby forming the head 2 into a shape similar to a button sewn to clothing with thread, and the surface of the head 2 in the area other than the three-dimensional pattern 4 and recessed portion 5 is rougher than the surface of the three-dimensional pattern 4.

Description

[Technical Field]

[0001] This invention relates to a synthetic resin rivet element for a snap fastener, which has, for example, a head and a crimping protrusion located in the center of the back surface of the head, and which is pierced through the fabric of clothing from the front side and crimped into a through hole in a fitting member located on the back side of the fabric, thereby attaching the fitting member to the fabric.More specifically, this invention relates to a synthetic resin rivet element for a snap fastener, whose head is formed in a shape similar to a button sewn to clothing with thread. [Background technology]

[0002] Generally, snap fasteners are attached to a sheet-like member (flexible substrate) such as clothing fabric using a snap fastener attaching machine. As shown in Figure 2, this snap fastener attaching machine comprises a receiving tool 52 that holds a rivet member 51 with its protrusion 51a facing upward, and a driving tool 53 that is driven to move up and down relative to the receiving tool 52. The driving tool 53 comprises an elevating member 54 that moves up and down relative to the receiving tool 52 using the power of an elevating drive device (not shown), a crimping punch 56 (an example of a crimping punch for attaching a snap fastener) fixed to the elevating member 54 with a set bolt 55, a cylindrical guide punch 57 that can slide up and down relative to the crimping punch 56, and a spring 58 that serves as a biasing means for biasing the guide punch 57 to slide downward.

[0003] The guide punch 57 is configured to be able to hold a male or female fitting member 59 having a through hole 59a formed in the center for inserting the protrusion 51a of the rivet member 51. Here, the guide punch 57 shown in Fig. 2 has a shape suitable for holding a male fitting member 59, and by removing the snap pin 57A and replacing it with a guide punch 57 having a shape suitable for holding a female fitting member 59, it is possible to hold a female fitting member 59 (see Fig. 3(A)). In other words, a guide punch 57 that holds a male fitting member 59 is used when forming a male snap, and a guide punch 57 that holds a female fitting member 59 is used when forming a female snap.

[0004] Then, with fabric C, such as a cloth, placed between rivet member 51 held by receiver 52 and fitting member 59 held by driving tool 53, as driving tool 53 moves toward receiver 52 (driving tool 53 descends), guide punch 57 attached to driving tool 53 presses fitting member 59 against fabric C. As a result, protrusion 51a of rivet member 51 breaks through fabric C and also penetrates through through-hole 59a of fitting member 59. The tip of protrusion 51a is struck by crimping punch 56 to expand and deform, thereby crimping rivet member 51 and fitting member 59 together with fabric C sandwiched therebetween. The male and female snaps can then be fitted together as shown in FIG. 3(B).

[0005] Incidentally, as described in paragraph 0007 of Patent Document 1, the present applicant has succeeded in commercializing a synthetic resin rivet member for snap fasteners, which is formed into a shape similar to a button that is sewn onto clothing with thread by forming a three-dimensional pattern of sewing thread on the surface of the head. Furthermore, in paragraph 0012 of Patent Document 1, the present applicant states that a rivet member, which is a single-color injection-molded product, cannot meet the design demand of changing the colors of the button and sewing thread, and therefore proposes in paragraph 0025 of the same document a technology for changing the color of the three-dimensional pattern from the rest by using a two-color molding method. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Utility Model Registration No. 3187024 Summary of the Invention [Problem to be solved by the invention]

[0007] The applicant has taken a different perspective from the circumstances under which the above technology was proposed and has succeeded in developing a technology that can make the difference in appearance between the button and the sewing thread more clear, even when a single-color injection-molded product is used for the rivet member, and is also expected to improve handleability.

[0008] The present invention was made with the above points in mind, and its purpose is to provide a synthetic resin rivet element for a snap fastener that can more clearly distinguish the appearance of the button from the sewing thread and is also expected to improve handling. [Means for solving the problem]

[0009] In order to achieve the above object, the synthetic resin rivet element for a snap fastener according to the present invention has a head and a crimping protrusion provided in the center of the back surface of the head, and the crimping protrusion is pierced into the fabric of a garment from the front side and crimped into a through hole in a fitting element located on the back side of the fabric, thereby attaching the fitting element to the fabric.The surface of the head is formed with a three-dimensional pattern that resembles a sewing thread and a recessed portion that resembles a thread hole through which the sewing thread passes, so that the head is shaped to resemble a button sewn to clothing with thread, and the surface of the head other than the three-dimensional pattern and the recessed portion is rougher than the surface of the three-dimensional pattern (Claim 1).

[0010] In the synthetic resin rivet member for the snap fastener, the peripheral edge of the back surface of the head is made to bulge out further toward the back side than the central part of the back surface located between the peripheral edge of the back surface and the crimping protrusion, and a plurality of small protrusions smaller than the crimping protrusions are formed around the crimping protrusions at the central part of the back surface of the head to dig into the fabric when the fitting member is attached to the fabric by the above-mentioned crimping, preventing the rivet member from rotating around its axis, and a protrusion extending from the peripheral edge of the back surface toward the central part of the back surface may be provided as a mark to indicate the orientation of the three-dimensional pattern on the surface of the head on the back side of the head (Claim 2).

[0011] In the above-mentioned synthetic resin rivet member for snap fasteners, the three-dimensional pattern may resemble two groups of threads crossing each other, and have a cross shape as a whole, and the protruding portion may be located at a position corresponding to one of the four ends of the three-dimensional cross-shaped pattern (Claim 3). [Effects of the Invention]

[0012] The present invention provides a synthetic resin rivet member for snap fasteners that can more clearly distinguish the appearance of the button and the sewing thread and is also expected to improve handling.

[0013] In other words, in the synthetic resin rivet element for snap fasteners according to the invention of each claim of this application, by varying the roughness of the surface of the three-dimensional pattern from that of the area other than the three-dimensional pattern and the recessed portion, it is possible to more clearly distinguish the appearance of the button expressed by the area other than the three-dimensional pattern and the recessed portion from that of the sewing thread expressed by the three-dimensional pattern. Furthermore, when setting this rivet element in a snap fastener setting machine, the area of ​​the head surface other than the three-dimensional pattern and the recessed portion will be held with the fingers, and if the surface of this area is appropriately roughened, it will be less likely to slip off, which is expected to contribute to improving the handleability of the rivet element.

[0014] In the synthetic resin rivet element for snap fasteners according to the inventions of claims 2 and 3, multiple small protrusions are provided in the center of the back surface of the head of the rivet element, so that when the rivet element is hammered into the fabric, i.e., when the crimping protrusions are pierced through the fabric from the front side and inserted into the through-holes of the fitting element located on the back side of the fabric, and then the tips of the protrusions are struck to crimp the rivet element, the multiple small protrusions dig into the fabric, acting as a non-slip surface and preventing the rivet element from rotating around its axis. Furthermore, when the rivet element is set in a receiving fixture of a snap fastener setting machine that holds the rivet element with the crimping protrusions facing upward, the three-dimensional pattern on the surface of the head, which faces downward, is inevitably hidden from the outside, but the orientation of the three-dimensional pattern can be determined by visually checking the protruding portion on the back surface of the head. This makes it easy to align the three-dimensional patterns of the sewing thread (the orientation of the heads shaped like buttons) in a garment where multiple snap fasteners are attached in a row, for example. [Brief explanation of the drawings]

[0015] [Figure 1] 1A and 1B are a front view (photograph) and a perspective view (photograph) from the rear side of a synthetic resin rivet member for a snap fastener according to one embodiment of the present invention. [Figure 2] 1 is a vertical cross-sectional side view showing a schematic configuration of a main part of an example of a snap fastener installation machine used to install snap fasteners. [Figure 3] 1A is a longitudinal side view showing the schematic configuration of the main parts of the snap fastener installation machine when holding a female fitting member, and FIG. 1B is a longitudinal side view showing the schematic mating state of the male and female snaps. DETAILED DESCRIPTION OF THE INVENTION

[0016] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

[0017] The rivet member 1 shown in Figures 1(A) and (B) is a synthetic resin rivet member for a snap fastener, which has a head 2 and a crimping projection 3 provided in the center of the back surface of the head 2, and is designed to be attached to the fabric C of clothing (see Figures 2 and 3) by piercing the crimping projection 3 from the front side and crimping it through a through-hole 59a in a fitting member 59 (see Figures 2 and 3) arranged on the back side of the fabric C. This crimping (attachment) can be performed by a method using the snap fastener attaching machine described with reference to Figures 2 and 3 (the receiving tool 52 may be given a shape capable of holding the rivet member 1, for example).

[0018] As shown in Figure 1(A), the surface of the head 2 of the rivet member 1 (the surface shown in Figure 1(A)) is formed with a three-dimensional pattern 4 that resembles a sewing thread and a recessed portion 5 that resembles a thread hole through which the sewing thread passes, thereby forming the head 2 into a shape that resembles a button sewn with thread to clothing (fabric C), and the surface of the head 2 in the areas other than the three-dimensional pattern 4 and the recessed portion 5 (in this example, the outer peripheral surface of the head 2 is a tapered surface whose outer diameter decreases from the back side to the front side of the head, and the surface of the head 2 also includes the outer peripheral surface of the head 2) is rougher than the surface of the three-dimensional pattern 4 (and the recessed portion 5). Such differences in roughness depending on the areas on the surface of the head 2 can be easily achieved by technical means, for example, by applying a texturing process (etching, blasting, etc.) to a predetermined area of ​​the mold used to injection mold the rivet member 1 and leaving other areas untextured. In this example, the surfaces of the three-dimensional pattern 4 and the recessed portion 5 are smooth, and the surface of the head portion 2 other than the three-dimensional pattern 4 and the recessed portion 5 is rough.

[0019] In the rivet member 1 configured in this manner, by varying the roughness of the surface of the three-dimensional pattern 4 and the surface of the portion other than the three-dimensional pattern 4 and the recessed portion 5, it is possible to more clearly distinguish the appearance of the button represented by the portion other than the three-dimensional pattern 4 and the recessed portion 5, from the appearance of the sewing thread represented by the three-dimensional pattern 4. Furthermore, when setting this rivet member 1 into a snap fastener setting machine, the portion of the surface of the head 2 other than the three-dimensional pattern 4 and the recessed portion 5 will be held with the fingers, and if the surface of this portion is made appropriately rough, it will be less likely to slip off, which is expected to contribute to improving the handleability of the rivet member 1.

[0020] As shown in Figure 1 (B), the back surface peripheral edge 6 of the head 2 is made to bulge out further toward the back side than the back surface central part 7 located between the back surface peripheral edge 6 and the crimping protrusion 3 (in other words, the back surface central part 7 is made to be recessed), and the back surface central part 7 of the head 2 has a plurality of small spike-shaped protrusions 8 (six in the illustrated example) formed around the crimping protrusion 3, which dig into the fabric C when the fitting member 59 is attached to the fabric C by the above-mentioned crimping, preventing the rivet member 1 from rotating around its axis, and a protrusion part 9 extending from the back surface peripheral edge 6 toward the back surface central part is provided as a mark to indicate the orientation of the three-dimensional pattern 4 on the surface of the head 2 on the back side of the head 2.

[0021] Here, as shown in Figure 1(A), the three-dimensional pattern 4 resembles two groups of threads crossing each other, and has a cross shape overall, and the protruding portion 9 is located at a position corresponding to one of the four ends (or four recessed portions 5) of the three-dimensional pattern 4 that has a cross shape (the end or recessed portion 5 located on the lower side in Figure 1(A)), as shown in Figure 1(B). In other words, if the lower recessed portion 5, the right recessed portion 5, the upper recessed portion 5, and the left recessed portion 5 in Figure 1(A) are located at positions of 0°, 90°, 180°, and 270° around the central axis of the rivet member 1, respectively, then the protruding portion 9 is located at a position of 0° around the central axis of the rivet member 1.

[0022] In this way, since the multiple small protrusions 8 are provided on the center 7 of the back surface of the head 2 of the rivet member 1, when the rivet member 1 is hammered into the fabric C, that is, when the crimping protrusions 3 are pierced through the fabric C of the clothing from the front side and inserted into the through holes 59a of the fitting member 59 arranged on the back side of the fabric C, and the tips of the protrusions 3 are struck to crimp the rivet member 1, the multiple small protrusions 8 bite into the fabric C to prevent slippage and prevent the rivet member 1 from rotating around its axis. Furthermore, when the rivet member 1 is set in the receiver 52 of a snap fastener setting machine that holds the rivet member 1 so that the crimping protrusions 3 face upward during this crimping process, for example, the three-dimensional pattern 4 on the surface of the head 2, which faces downward, is inevitably hidden from the outside, but the orientation of the three-dimensional pattern 4 can be determined by visually checking the protruding portion 9 on the back surface of the head 2. This makes it easy to align the orientation of the three-dimensional pattern 4 of the sewing thread (the orientation of the heads 2, which are shaped like buttons) in a garment to which multiple snap fasteners are attached in a row, for example.

[0023] The small protrusions 8 may have a protruding height that is higher, lower, or equal to that of the rear peripheral edge 6, as long as they are able to dig into the fabric C and prevent the rivet member 1 from rotating about its axis as described above.

[0024] The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit and scope of the present invention. For example, the following modifications can be made:

[0025] The three-dimensional pattern 4 shown in FIG. 1(A) imitates two groups of threads intersecting each other in a crisscross pattern, but is not limited to this and may imitate groups of threads in other shapes.

[0026] Furthermore, the recesses 5 shown in FIG. 1(A) are provided in a total of four to make the surface of the head 2 resemble a four-hole button, but this is not limited thereto, and for example, two may be provided in total to make the surface of the head 2 resemble a two-hole button.

[0027] In the example of Figure 1(B), only one protrusion portion 9 is provided at the 0° position, but this is not limited to this and multiple protrusion portions may be provided.For example, only one protrusion portion may be provided at either the 90° position or the 270° position, or two protrusion portions may be provided at the 0° and 180° positions, or two protrusion portions may be provided at the 90° and 270° positions.

[0028] It goes without saying that the above modifications may be combined as appropriate. [Explanation of symbols]

[0029] 1 Rivet member 2 heads 3 Crimping protrusion 4. Three-dimensional patterns 5. Hollow entrance 6 Back edge 7 Center of the back 8 small protrusions 9. Protruding part 51 Rivet material 51a protrusion 52 Receptacle 53 Driving tool 54 Lifting member 55 sets of bolts 56 Crimping punch 57 Guide punch 57A Snap Pin 58 Spring 59 Fitting member 59a Through hole C Fabric

Claims

1. A synthetic resin rivet member for a snap fastener has a head and a crimping protrusion provided at the center of the back surface of the head, and the crimping protrusion is pierced through the fabric of a garment from the front side and crimped into a through-hole of a fitting member arranged on the back side of the fabric, thereby attaching the fitting member to the fabric, The head is formed into a shape resembling a button sewn onto clothing with thread by forming a three-dimensional pattern resembling a sewing thread and a recessed portion resembling a thread hole through which the sewing thread passes on the surface of the head, A synthetic resin rivet member for a snap fastener, in which the surface of the head portion other than the three-dimensional pattern and the recessed portion is rougher than the surface of the three-dimensional pattern.

2. The peripheral edge of the back surface of the head is bulged outward from the central part of the back surface located between the peripheral edge of the back surface and the crimping projection, The head has a central back surface, and a plurality of small protrusions smaller than the crimping protrusion are formed around the crimping protrusion to bite into the fabric when the fitting member is attached to the fabric by the crimping. A synthetic resin rivet member for a snap fastener as described in claim 1, wherein a protruding portion extending from the peripheral edge of the back surface toward the center of the back surface is provided as a mark to indicate the orientation of the three-dimensional pattern on the surface of the head on the back surface of the head.

3. The three-dimensional pattern is made up of two groups of threads crossing each other, creating a cross shape as a whole.

3. The synthetic resin rivet element for a snap fastener according to claim 2, wherein the protruding portion is located at a position corresponding to one of four ends of the three-dimensional cross-shaped pattern.

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