Zipper stop and method for manufacturing zipper stop
By setting a recess on the inner side of the foot of the zipper stop, the problem of poor adhesion of the stop during the painting process is solved, thus improving the painting quality and appearance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- YKK CORP
- Filing Date
- 2021-07-20
- Publication Date
- 2026-07-24
AI Technical Summary
Existing zipper stoppers are prone to sticking or producing uncolored parts during the coating process due to overlapping of the stoppers, resulting in a high defect rate.
A recess is provided on the inner side of the foot of the stop, and the depth of the recess is more than 3.8% and less than 18.9% of the thickness of the foot, so as to reduce the contact area of the stop during painting.
It effectively reduces the uncolored parts caused by adhesion or peeling of adhesive during the coating process, thus improving the coating quality of the stops.
Smart Images
Figure CN117295432B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a zipper stop and a method for manufacturing the zipper stop, and particularly to a stop such as an upper stop for limiting the sliding range of the zipper pull in a zipper, and a method for manufacturing the same. Background Technology
[0002] The zipper includes a pair of left and right zipper bars, a zipper pull for the user to slide and open or close between rows of zipper teeth on opposite edges of the zipper tape on the left and right zipper bars, and a stop such as an upper stop for limiting the sliding range of the zipper pull.
[0003] Japanese Patent Publication No. 58-98810 (Patent Document 1) and Utility Model Registration No. 3164407 (Patent Document 2) disclose a stop member installed in front of a zipper. This stop member has a head and a pair of forked legs protruding from the head. When installing the stop member onto the zipper tape, the opposing edges of the zipper tape are positioned between the two legs, and then the legs of the stop member are tightened to close them. Thus, the stop member is fixed to the zipper tape.
[0004] In metal stops, the stops are typically coated before being installed onto the zipper tape. This coating process involves placing several stops in a cylindrical container and spraying paint onto the stops from the outside of the container while rotating the container.
[0005] In the above painting process, there is a situation where two of the several randomly moving stops inside the barrel-shaped container overlap each other. (Refer to...) Figure 7 This is a state where the head (11A) of one stop (10A) overlaps with the two legs (12B) of the other stop (10B). At this time, the two curved head corners (11c) of the head (11A) of one stop (10A) contact the inner surfaces 12b of each leg (12B) of the other stop (10B). Therefore, there is a possibility that the two stops are bonded together through the paint at the contact points. There is also a possibility that such bonded portions may peel off during or after the painting process, resulting in uncolored areas and causing defects in the stops.
[0006] Existing technical documents
[0007] Patent documents
[0008] Patent Document 1: Japanese Patent Implementation License No. 58-98810
[0009] Patent Document 2: Japanese Utility Model Registration No. 3164407. Summary of the Invention
[0010] The problem that the invention aims to solve
[0011] The present invention was developed in view of the above-mentioned problems, and its purpose is to provide a zipper stop that can reduce the mutual adhesion or defect rate in the coating process, and a method for manufacturing the zipper stop.
[0012] means for solving problems
[0013] To solve the above problems, according to one aspect of the present invention, a zipper stop is provided, which is a coated metal stop for zippers, characterized in that it has a head and a pair of feet extending from the head in a bifurcated manner, each foot having a recess in the center of its inner side, the depth of the recess being more than 3.8% and less than 18.9% of the thickness of the feet of the stop.
[0014] In this invention, the recesses of the stop are processed before the painting process, and the stop is installed on the zipper tape after the recesses are processed. In this invention, by providing recesses on the inner surfaces of each foot of the stop, even if two stops overlap during the painting process, the bonding area between the two stops can be reduced, thus lowering the proportion of defects caused by adhesion or peeling, resulting in uncolored portions. In particular, when the ratio of the depth of the recess to the thickness of the foot of the stop is set to 3.8% or more and 18.9% or less, the contact area between the two stops during the painting process can be reduced. When the ratio is less than 3.8%, it has little effect on reducing adhesion between the two stops during the painting process. Furthermore, when a recess exceeding 18.8% is formed using a groove forming mold, noticeable raised indentations appear on the outer surfaces of each foot of the upper stop corresponding to the recess, damaging the appearance of the upper stop.
[0015] In one embodiment of the present invention, the length of the recess in the longitudinal direction is 13.5% or more and 23.5% or less relative to the length of the stop in the longitudinal direction. Therefore, when the two stops overlap during the painting process, the bonding area between the two stops can be reduced, effectively reducing adhesion between the stops or the generation of uncolored portions.
[0016] The stop of the present invention is made of aluminum, aluminum alloy, copper, copper alloy, titanium, titanium alloy, nickel, nickel alloy, magnesium, magnesium alloy, etc., but is not limited to these.
[0017] In one embodiment of the present invention, the recess, in a cross-section along the length direction of the stop member, includes a bottom that is deepest from the inner side surface and two concave curved surface-shaped corners that taper from the bottom surface towards the inner side surface, wherein the radius of curvature of the corners is 0.6 mm or more. In another embodiment of the present invention, the recess, in a cross-section along the width direction of the stop member, includes a bottom that is deepest from the inner side surface and two concave curved surface-shaped corners that taper from the bottom surface towards the inner side surface, wherein the radius of curvature of the corners is 0.6 mm or more. When the radius of curvature of the corners is less than 0.6 mm, the convex indentations on the outer surfaces of each foot of the stop member are also noticeable, which may damage the appearance of the stop member.
[0018] In one embodiment of the present invention, the depth of the recess is 0.02 mm or more and 0.1 mm or less. Furthermore, in other embodiments of the present invention, the length of the recess in the longitudinal direction is 0.512 mm or more and 1.294 mm or less.
[0019] According to another aspect of the present invention, a method for manufacturing a zipper stop is provided, characterized by comprising: step A, providing a recess at the center of the inner surface of each of the inner surfaces of the feet of a metal stop having a head and a pair of feet extending from the head in a bifurcated manner; and step B, after step A, storing a plurality of the stops in a container and coating the stops while moving the container. In one embodiment of the present invention, the depth of the recess is in a ratio of 3.8% or more and 18.9% or less to the thickness of the feet of the stop.
[0020] Invention Effects
[0021] In this invention, by providing a recess in the center of the inner side of each foot of the stop member, and setting the depth of the recess to a ratio of 3.8% to 18.9% of the thickness of the foot of the stop member, the bonding area between the two stop members can be reduced even when they overlap during the painting process. Therefore, the proportion of stop member defects caused by adhesion or peeling of the adhesive can be reduced. Attached Figure Description
[0022] Figure 1 This is a top view showing a zipper including the stop element of the present invention cut along its length.
[0023] Figure 2 This is a cross-sectional view of the zipper tape installed at the opposite edge.
[0024] Figure 3 It is a three-dimensional view showing the top stop in the state before it is installed on the zipper tape;
[0025] Figure 4 It is a cross-sectional view of the top end, which is the midpoint along the length direction of the top end;
[0026] Figure 5 It means along Figure 3 A cross-section of the concave part of the SS line (a cross-section along the length direction);
[0027] Figure 6 yes Figure 4 The enlarged view of the concave part is a cross-section along the width direction of the concave part;
[0028] Figure 7 This is a front view showing two overlapping stops in the painting process. Detailed Implementation
[0029] The following describes embodiments of the zipper stopper according to the present invention based on the accompanying drawings; however, the present invention is not limited to such embodiments. Figure 1 This is a top view showing the zipper 1 broken along its length. The zipper 1 includes two top stops 10, 10 according to one embodiment of the zipper stop of the present invention. In this embodiment, the top stops 10 are made of aluminum alloy, but are not limited thereto.
[0030] Zipper 1 has a pair of left and right zipper beams 2, 2 and a zipper pull 3. The user slides the zipper pull 3 to open or close the left and right zipper beams 2, 2. The zipper pull 3 has a pull tab 3a for the user to grip. Each zipper beam 2 has a strip-shaped zipper band 4 and a tooth row 5 composed of several metal teeth 5a, which are arranged along the opposite edge (the edge facing the opposite side of the zipper band 4) in the width direction of the zipper band 4. The left and right top stops 10, 10 are installed on the opposite edge of each zipper band 4 in a manner that abuts the upper end of each tooth row 5. The opposite edge of each zipper band 4 is woven with a core cord 6, thereby making the opposite edge thick-walled. Figure 2 This is a cross-sectional view of the zipper tape 4 with the top stop 10 installed behind the opposite edge. The top stop 10 and the zipper teeth 5a are fastened to the zipper tape 4 by means of an inner core cord 6, thereby increasing the installation strength of the top stop 10 and the zipper teeth 5a. Regarding the zipper 1, if the user slides the zipper pull 3 upward, the zipper teeth rows 5, 5 of the left and right zipper longitudinal beams 2, 2 close; if the user slides the zipper pull 3 downward, the zipper teeth rows 5, 5 open. The top stop 10 restricts the upward movement of the zipper pull 3. The zipper 1 includes a bottom stop 7 that restricts the downward movement of the zipper pull 3. The bottom stop 7 is installed across the lower ends of the left and right zipper teeth rows 5, 5.
[0031] Figure 3 This is a perspective view showing the top stop 10 in its position before being installed on the zipper tape 4. Figure 3 The upper limit 10 is the upper limit after the painting process. Figure 4It is along the length direction LD of the top stop 10 (refer to) Figure 3 A cross-sectional view of the upper stop 10 at the midpoint of the ) . Hereinafter, for ease of explanation, the vertical and horizontal directions with respect to the upper stop 10 are based on Figure 4 The design is based on the paper. The upper stop 10 has a head 11 and left and right feet 12, 12 extending downward from the head 11 in a bifurcated shape. The upper stop 10 has two end faces 10a, 10a in the length direction LD (see reference). Figure 3 Each end face 10a is parallel to each other. The length of the stop 10 in the longitudinal direction LD is defined as L1. L1 is the distance between the two end faces 10a, 10a. The cross-section of the two feet 12, 12 expands approximately in a V-shape downwards from the head 11. Each foot 12 is a generally plate-shaped part, having an outer surface 12a and an inner surface 12b. The midpoint of the inner surface 12b of the left and right feet 12 in the left-right direction (refer to...) Figure 3 The imaginary lines M are connected to each other. In other words, the imaginary lines M are the boundaries between the left and right inner surfaces 12b. Each foot 12 has a recess 20 in the center of its inner surface 12b. As will be explained later, the recess 20 is processed before the painting process of the top stop 10. The recess 20 on the inner surface 12b is a roughly elliptical shape that is longer in the length direction LD of the top stop 10, with its major axis along the length direction LD and its minor axis along the width direction (the direction in which the foot body 13 widens and is perpendicular to the length direction, as described later). In addition, the length direction LD is consistent with the length direction of the zipper strap 4 on which the top stop 10 is installed.
[0032] Reference Figure 4 The head 11 of the upper stop 10 has a generally horizontal top surface 11a and generally vertical left and right side surfaces 11b, 11b. Furthermore, the upper stop 10 includes head corners 11c between the top surface 11a and the left and right side surfaces 11b, 11b. Each head corner 11c is defined by a convex curved surface 11d that smoothly connects the top surface 11a and each side surface 11b. The radius of curvature of the head corner 11c is preferably set to be greater than the radius of curvature R2 of the corner 22 in the width direction of the concave portion 20 described later (see reference). Figure 6 The foot 12 includes a foot body 13 extending obliquely downward from the head 11, and foot ends 14 extending substantially vertically downward from the lower end of the foot body 13. A recess 20 is configured to include the midpoint of the foot body 13 in both the length and width directions on the inner surface 12b of the foot 12. The outer surface 14a and inner surface 14b of each foot end 14 are substantially parallel to the left and right sides 11b, 11b of the head 11. (See reference...) Figure 2 With the upper stop 10 fastened to the zipper strap 4, the two foot bodies 13 are nearly parallel to each other on the front and back sides of the zipper strap 4, and the two foot ends 14 press against the front and back sides of the zipper strap 4.
[0033] Figure 5 Show along Figure 3 The cross-section of the concave part 20 of the SS line. Figure 5 It is a cross-section along the major axis of the recess 20, i.e., the length direction. In contrast, Figure 4 The cross-section of the recess 20 shown is along its minor axis (width direction). Figure 6 yes Figure 4 The enlarged view of the recess 20 is a cross-section along the width direction of the recess 20. The recess 20 includes a bottom 21 that is deepest from the inner side 12b of the foot 12, and two corners 22 that gradually become shallower from the bottom 21 towards the inner side 12b. The bottom 21 is longer in the length direction of the recess 20 (see reference). Figure 5 The recess 20 is shorter in the width direction (see reference). Figure 6 The cross-sectional shape of the recess 20 in the width direction is arc-shaped due to the two substantially adjacent corners 22.
[0034] To manufacture the top stop 10, firstly, the raw material for the top stop 10, namely a long strip of aluminum alloy with a circular cross-section, is rolled into a V-shaped cross-section. This cross-section is essentially the cross-section of the top stop 10. Secondly, for the inner side of the V-shaped cross-section of the metal wire, recesses 20 are machined at predetermined intervals along the length direction using a groove forming die (step A). Next, the metal wire is cut along its length to obtain several top stops 10 before coating. The end face 10a of the top stop 10 is the cut surface of the metal wire. Then, the several top stops 10 are coated (step B). In this coating step, the several top stops 10 are placed in a barrel-shaped container, and while rotating the barrel-shaped container, paint is sprayed onto the top stops 10 from the outside of the barrel-shaped container, and then allowed to dry. This coating and drying process is repeated multiple times. Afterward, the top stops 10 are installed on the zipper belt 4. With the top stop 10 installed on the zipper tape 4, after the opposing edges (core cord 6) of the zipper tape 4 are positioned between the two feet 12, the two feet 12 of the top stop 10 are fastened by a mold to close them. Thus, as... Figure 2 As shown, the upper stop 10 is fixed to the zipper tape 4.
[0035] In the above coating process, there is a situation where two of the several top stops 10 that move randomly inside the barrel-shaped container overlap each other. Figure 7 This is a front view showing two identical top stops 10, namely top stops 10A and 10B, that overlap during the painting process. Figure 7In this configuration, the head 11A of one upper stop 10A overlaps with the two legs 12B of the other upper stop 10B. At this time, the two head corners 11c of the head 11A of the upper stop 10A contact the inner surfaces 12b of the two legs 12B of the upper stop 10B. However, the contact area between the two upper stops 10A and 10B is reduced by the recesses 20 provided on the inner surfaces 12b of each leg 12B of the upper stop 10B. This reduces the proportion of defects in the upper stops 10A and 10B caused by paint adhering to each other at the contact points, or by uncolored portions resulting from paint peeling off during or after the painting process.
[0036] Reference Figure 5 The thickness of the foot 12 of the upper stop 10 is set to "E", and the depth of the recess 20 is set to "D". The thickness E of the foot 12 is the interval between the outer side 12a and the inner side 12b of the foot 12. The depth D of the recess 20 is the interval between the inner side 12b and the bottom 21 of the recess 20. In this embodiment, the ratio D / E of the depth D of the recess 20 to the thickness E of the foot 12 is set to 3.8% or more and 18.8% or less. This reduces the contact area between the two upper stops 10A and 10B during the painting process, and reduces the proportion of uncolored portions resulting from paint adhesion between the two upper stops 10A and 10B at the contact points, or from the peeling off of such adhered portions. When the ratio D / E is less than 3.8%, it has little effect on reducing adhesion between the two upper stops 10A and 10B during the painting process. Furthermore, when the recess 20 is formed using a groove forming mold with a ratio D / E exceeding 18.8%, the convex indentations on the outer surface 12a of each foot 12 of the upper stop 10 corresponding to the recess 20 are obvious, and the appearance of the upper stop 10 is damaged.
[0037] Furthermore, in the upper stop 10, the radius of curvature R1 of the corner portion 22 in the cross-section along the length direction of the recess 20 is set to 0.6 mm or more. If the radius of curvature R1 of the corner portion 22 is less than 0.6 mm, the convex indentation on the outer surface 12a of the foot portion 12 corresponding to the recess 20 is also noticeable, damaging the appearance of the upper stop 10. Similarly, the radius of curvature R2 of the corner portion 22 in the cross-section along the width direction of the recess 20 is also preferably set to 0.6 mm or more.
[0038] (Table 1)
[0039] *One batch of paint treatment = 5,000g (approximately 125,000 pieces)
[0040]
[0041] Table 1 shows the results of measuring the proportion of two stops that bonded together during the coating process (bonding failure rate) and the proportion of defects caused by bonding peeling after coating in a batch of 5000g (approximately 125,000 pieces) of the upper stop 10 of the present invention (Examples 1-6) and a stop with the same dimensions as the upper stop 10 but without a recess (Comparative Example). The dimensions of the upper stop 10 in this case are as follows. The length L1 of the upper stop 10 in the longitudinal direction (refer to...) Figure 3 The length L2 of the recess 20 in the longitudinal direction is 3.80mm to 4.00mm. Figure 5 The depth D of the recess 20 is 0.512 mm to 1.294 mm, and the ratio of the length L2 of the recess 20 in the longitudinal direction to the length L1 of the upper stop 10 in the longitudinal direction is 13.5% to 23.5%. The thickness E of the foot 12 of the upper stop 10 is 0.53 mm. The depth D of the recess 20 is 0.03 mm in Example 1, 0.06 mm in Example 2, 0.10 mm in Example 3, 0.02 mm in Example 4, 0.04 mm in Example 5, and 0.10 mm in Example 6. The ratio D / E of the depth D of the recess 20 to the thickness E of the foot of the upper stop 10 is 5.7% in Example 1, 11.3% in Example 2, 18.9% in Example 3, 3.8% in Example 4, 7.5% in Example 5, and 18.9% in Example 6. Furthermore, the radii of curvature R1 and R2 of the corners 22 in both the length and width directions of the recess 20 are absent in Examples 1-3, but are all 0.6 mm in Examples 4-6. Further, the volume of the recess 20 is 0.002 mm. 3 ~0.058mm 3 As shown in Table 1, compared with the non-recessed stop of the comparative example, the bonding failure rate and the bonding detachment failure rate are significantly reduced in the upper stop 10 with recess 20 in Examples 1 to 6.
[0042] (Table 2)
[0043] R1 R2 Depth of recess D Recess length L2 concavity volume Stopper appearance Stamping formability Poor adhesion Example 7 0.0mm 0.6mm 0.100mm 1.294mm <![CDATA[0.058mm 3 ]]> × ○ ○ Example 8 0.0mm 0.6mm 0.060mm 1.214mm <![CDATA[0.026mm 3 ]]> × ○ ○ Example 9 0.0mm 0.6mm 0.030mm 1.150mm <![CDATA[0.009mm 3 ]]> × ○ ○ Example 10 0.6mm 0.6mm 0.100mm 0.892mm <![CDATA[0.057mm 3 ]]> ○ ○ ○ Example 11 0.6mm 0.6mm 0.040mm 0.702mm <![CDATA[0.010mm 3 ]]> ○ ○ ○ Example 12 0.6mm 0.6mm 0.020mm 0.512mm <![CDATA[0.002mm 3 ]]> ○ ○ ○
[0044] Table 2 shows observations on the appearance of the outer side 12a of the foot portion 12 of the upper stop 10, the stamping formability of the recess 20, and whether the two upper stops 10 are difficult to bond during the painting process, by changing the radius of curvature R1 and R2 of the corner portion 22 of the recess 20, the length L2 of the recess 20, and the volume of the recess 20 for the upper stop 10 (i.e., Examples 7-9), where R1 is 0.0 mm, obvious convex indentations are produced on the outer side 12a of the foot portion 12 of the upper stop 10, and the appearance of the upper stop 10 is damaged. In Examples 10-12, where both R1 and R2 are 0.6 mm, such convex indentations are not obvious. In addition, the stamping formability of Examples 7-12 is good, and there is almost no poor bonding.
[0045] Symbol explanation:
[0046] 1. Zipper
[0047] 2 Zipper longitudinal beams
[0048] 3. Pull the screwdriver
[0049] 4 Zipper tape
[0050] 5 Chain teeth
[0051] 6-core rope
[0052] 10, 10A, 10B (stop parts)
[0053] 11. Head
[0054] 11c Head corner
[0055] 12 Feet
[0056] 12a Outer side of the foot
[0057] 12b Inner side of the foot
[0058] 20 concavity
[0059] 21 Bottom
[0060] 22 corner
[0061] D Depth of the recess
[0062] E. Foot thickness
[0063] L1 length of the stop component
[0064] L2 Length of the concave part
[0065] The radius of curvature along the length of the corner of the concave portion R1
[0066] The radius of curvature in the width direction of the corner of the R2 concave portion.
Claims
1. A zipper stop, comprising a pre-coated metal stop (10) for zippers, characterized in that, It has a head (11) and a pair of feet (12) extending from the head (11) in a bifurcated manner. The foot (12) has a recess (20) at the center of its inner side (12b). The depth (D) of the recess (20) is 3.8% or more and 18.9% or less relative to the thickness (E) of the foot (12) of the stop (10). Each foot (12) includes a foot body (13) extending obliquely downward from the head (11) and a foot end (14) extending downward substantially vertically from the lower end of the foot body (13). The recess (20) is configured to include the midpoint of the foot body (13) in the length direction and the midpoint of the foot body (13) in the width direction on the inner side (12b) of each foot (12).
2. The zipper stop according to claim 1, characterized in that, The length (L2) of the recess (20) in the longitudinal direction is more than 13.5% and less than 23.5% of the length (L1) of the stop (10) in the longitudinal direction.
3. The zipper stop according to claim 1 or 2, characterized in that, The recess (20) in a cross section along the length direction of the stop (10) includes a bottom (21) that is deepest from the inner side surface (12b) and two concave curved surfaces (22) that become shallower from the bottom (21) toward the inner side surface (12b), the radius of curvature of the corner (22) being 0.6 mm or more.
4. The zipper stop according to claim 3, characterized in that, The recess (20) includes a bottom (21) that is deepest from the inner side surface (12b) and two concave curved surfaces (22) that become shallower from the bottom (21) toward the inner side surface (12b) on a cross section along the width direction of the stop (10), the corner (22) having a radius of curvature of 0.6 mm or more.
5. The zipper stop according to any one of claims 1 to 4, characterized in that, The depth (D) of the recess (20) is more than 0.02 mm and less than 0.1 mm.
6. The zipper stop according to any one of claims 1 to 5, characterized in that, The length (L2) of the recess (20) in the longitudinal direction is more than 0.512 mm and less than 1.294 mm.
7. A method for manufacturing a zipper stop, characterized in that, include: In step A, a recess (20) is provided at the center of the inner surface (12b) of each of the feet (12) of a metal stop (10) having a head (11) and a pair of feet (12) extending from the head (11) in a bifurcated manner; and Step B, after step A, involves placing several of the stop pieces (10) into a container and painting the stop pieces (10) while moving the container. The depth (D) of the recess (20) is 3.8% or more and 18.9% or less relative to the thickness (E) of the foot (12) of the stop (10). Each foot (12) includes a foot body (13) extending obliquely downward from the head (11) and a foot end (14) extending downward substantially vertically from the lower end of the foot body (13). The recess (20) is configured to include the midpoint of the foot body (13) in the length direction and the midpoint of the foot body (13) in the width direction on the inner side (12b) of each foot (12).
8. The method for manufacturing a zipper stop according to claim 7, characterized in that, The length (L2) of the recess (20) in the longitudinal direction is more than 13.5% and less than 23.5% of the length (L1) of the stop (10) in the longitudinal direction.