SLIDE

Abstract

A slide (1, 2) according to the present invention comprises a slide body (10, 70), an elastic part (40, 100) and a pull tab (50, 110), wherein the slide body (10, 70) is made of an aluminum alloy, the composition of which is represented by a general formula: Al a Mg b Mn c Cr d (a, b, c and d are given in wt.%, a is a residue, 3.9 ≤ b ≤ 6.5, 0 < c ≤ 0.4, 0 < d ≤ 0.3, where an unavoidable impurity may be present) or a general formula: Al e Mg f Si g Cu h Cr i(e, f, g, h and i are in wt.%, e is a residue, 0.8 ≤ f ≤ 2.0, 0.4 ≤ g ≤ 0.9, 0.15 ≤ h ≤ 0.8, 0 < i ≤ 0.45, where an unavoidable impurity may be present), wherein a receiving area (30, 90) for the part is provided on the guide column (12, 72) of the slide body (10, 70), wherein the receiving area (30, 90) comprises a concave insertion groove area (31, 91), wherein the average Vickers hardness of the guide column (12, 72) is greater than or equal to 100 Hv. Accordingly, it is possible to ensure that the slide body (10, 70) does not easily deform and become unusable, even if a sliding operation of the slide is repeated.

Description

Technical area

[0001] The present invention relates to a slider for a zipper. Background technology

[0002] A copper alloy (copper-zinc alloy), such as brass, is commonly used as the metallic component for forming a zipper. For example, International Publication No. 2012 / 032657 (Patent 1) describes a slider in which the slider body is made of a copper-zinc alloy as a slider for a zipper.

[0003] In particular, the slide in patent specification 1 is formed from three components: the slide body, a leaf spring part attached to the slide body, and a pull tab. The slide body and the pull tab are formed by pressing a plate-shaped material made of a copper-zinc alloy.

[0004] Furthermore, the slider in patent specification 1 features a stop mechanism that holds the slider in the stop position and prevents it from moving when it is stopped relative to rows of coupling links of the zipper. Specifically, the leaf spring part in patent specification 1 is provided with a stopper claw section, and this stopper claw section can, for example, when a sliding action of the slider is stopped and the pull tab is moved downwards relative to the slider body, engage with a coupling link guide passage of the slider body. Accordingly, the stopper claw section of the leaf spring part engages with the coupling links, thus making it possible to block the slider so that it does not move from the stop position of the coupling link rows.

[0005] Meanwhile, for example, the unexamined Japanese patent application Publication No. 2004-250760 (Patent 2) and the unexamined Japanese patent application Publication No. 2006-291298 (Patent 3) describe the use of an aluminum alloy for components that include coupling links, a stopper, a slider, a pull tab, etc., which form a zipper. Reference list of patent literature Patent specification 1: International Publication No. 2012 / 032657 Patent specification 2: Unexamined Japanese patent application Publication No. 2004-250760 Patent specification 3: Unexamined Japanese patent application Publication No. 2006-291298 Summary of the invention; Technical task

[0006] When forming a slide body for a slide by pressing a plate-like material from a metal, as described in patent specification 1, a copper alloy (copper-zinc alloy) is usually used which is suitable for processing and with which a strength suitable for use as a slide can easily be ensured.

[0007] On the other hand, as described in patent specifications 2 and 3, forming a slide body from an aluminum alloy allows for an increased range of products with slides and enables weight and cost reductions for the slide body. However, under normal circumstances, when a slide body is formed by pressing a sheet-like material from an aluminum alloy, there is the disadvantage that, compared to a copper-zinc alloy, the pressing process in the aluminum alloy can cause deformations, such as cracks.

[0008] Furthermore, for example, during the sliding action of a zipper slider, if a load is applied to the slider, the slider body can deform slightly because a slider body made of an aluminum alloy has lower strength than one made of a copper-zinc alloy. As a result, the slider may not function correctly. Therefore, sliders with a slider body made from an aluminum alloy produced by pressing have not typically been marketed.

[0009] The present invention was developed in light of the problems mentioned above, and one objective of the present invention is to provide a slide in which a slide body is formed by pressing an aluminum alloy and in which it is possible to ensure that the slide body does not easily deform and become unusable, even when a sliding process is repeated. Solution to the task

[0010] To achieve the aforementioned objective, a slider is provided according to the present invention, which is a slider for a zipper, wherein the slider comprises a slider body in which an upper plate and a lower plate are coupled to each other with a guide column, an elastic part attached to the slider body, and a pull tab comprising a shaft section held between the slider body and the elastic part, wherein the slider body is made of an aluminum alloy, the composition of which is represented by a general formula: Al a Mg b Mn c Cr d (a, b, c and d are given in wt.%, a is a residue, 3.9 ≤ b ≤ 6.5, 0 < c ≤ 0.4, 0 < d ≤ 0.3, where an unavoidable impurity may be present) or by a general formula: Al e Mg f Si g Cu h Cr i(e, f, g, h and i are in wt.%, e is a residue, 0.8 ≤ f ≤ 2.0, 0.4 ≤ g ≤ 0.9, 0.15 ≤ h ≤ 0.8, 0 < i ≤ 0.45, where an unavoidable impurity may be present), wherein a receiving area (for the part) is provided at least on the guide column of the slide body, wherein the part receiving area comprises a concave insertion groove area into which a section of the elastic part is inserted, and wherein the average Vickers hardness of the guide column is greater than or equal to 100 Hv.

[0011] In the slide according to the present invention, the slide body preferably has a pair of left and right shoulder openings arranged at a front end section of the slide body where the guide column is attached, and a rear opening arranged at a rear end section of the slide body, wherein the pair of left and right shoulder openings is arranged such that the guide column is located between the pair of left and right shoulder openings, and wherein, when a tension test is performed in which the pull tab is pulled with a load of 120 N in an up / down direction orthogonal to the upper shield plate and the lower shield plate in order to separate from the lower shield plate, in a state in which the slide body is supported, the slide body has a strength with which a difference between the extension of the rear opening with respect to the up / down direction,before the stress test is performed, and the expansion of the rear opening in the up / down direction after the load is removed is less than 1 mm.

[0012] In the present invention, preferably, when a cross-section of the receiving area is viewed orthogonally to the top / bottom direction at a position midway between the upper shield plate and the lower shield plate with respect to the top / bottom direction, and when an extension of the receiving area with respect to the longitudinal direction of the slide at a central position with respect to the width direction of the slide is designated as the central longitudinal extension A, and an extension of the receiving area from a position at a front edge to a position at a rear edge with respect to the longitudinal direction of the slide is designated as a maximum longitudinal extension B of the receiving area, the receiving area has an arrangement relationship in which "the central longitudinal extension A < (the maximum longitudinal extension B - the central longitudinal extension A)".

[0013] In this case, the recording area preferably has an arrangement relationship where “0.60 ≤ (the maximum length B - the central length A) / the maximum length B ≤ 0.75”.

[0014] In the present invention, preferably, if a maximum value of an extent of the receiving area with respect to a width direction of the slide at a position in the middle between the upper shield plate and the lower shield plate with respect to an up / down direction is designated as maximum width extent W1, and an extent of the rear opening of the slide body with respect to a width direction of the slide is designated as opening width W2, the slide body has an arrangement relationship in which "the maximum width extent W1 < the opening width W2". Advantageous effect of the invention

[0015] A slide according to the present invention comprises a slide body formed by pressing an aluminium alloy and is capable of causing the slide body not to deform easily and become unusable, even when a sliding operation is repeated. Brief description of the drawings [ Fig. 1] Fig. Figure 1 is a perspective view schematically representing a slider according to a first embodiment of the present invention. [ Fig. 2] Fig. 2 is a perspective exploded view showing an exploded state of the in Fig. The slide shown in Figure 1 is a schematic representation. [ Fig. 3] Fig. 3 is a rear view of a slide body of the in Fig. 1 illustrated slider, which schematically represents it. [ Fig. 4] Fig. 4 is a sectional view showing a cross-section along the Fig.The 3 displayed IV-IV line schematically represents this. [ Fig. 5] Fig. 5 is a sectional view showing a cross-section along the Fig. The 4 displayed VV line schematically represents this. [ Fig. 6] Fig. Figure 6 is an explanatory view to explain the measurement procedure for measuring the opening resistance of a slide valve. [ Fig. 7] Fig. Figure 7 is a top view schematically illustrating a slide according to a second embodiment of the present invention. [ Fig. 8] Fig. 8 is a sectional view showing a cross-section along the Fig. The VIII-VIII line shown in section 7 is shown schematically. [ Fig. 9] Fig. 9 is a sectional view showing a cross-section of the slide body along the in Fig. The IX-IX line is shown schematically in the 8 displayed diagram. Description of the embodiments

[0016] As described above, since a typical slide body made of aluminum alloy has lower strength than one made of a copper-zinc alloy, a problem arises: the slide body easily deforms when the load required for sliding is applied during the slide's operation. Therefore, the inventors conducted various tests and evaluations of slide bodies made of aluminum alloys and discovered that, for example, when a load is applied during a sliding operation, deformation easily occurs, increasing the rear opening of the slide body in the up / down direction. They concluded that if the occurrence of such deformation can be prevented or reduced, it becomes possible to practically utilize a slide body made of aluminum alloy.

[0017] Furthermore, the inventors of the present invention, based on serious studies and considerations regarding slide bodies made of aluminium alloys, have found that by improving the hardness and stiffness of a receiving area (in particular a guide column) which receives a section of an elastic part of the slide body, a deformation as described above does not simply occur, and have completed the present invention by continuing the development of a structure, a manufacturing process, etc. of a slide body in order to improve the deformation resistance of the slide body.

[0018] An example of a suitable embodiment of a slide according to the present invention is described in detail below with reference to the drawings. It should be noted that the present invention is not limited to the embodiments described below and various modifications are possible, provided that the modifications result in substantially the same configuration as that of the present invention and achieve similar effects. (First embodiment)

[0019] Fig. Figure 1 is a perspective view schematically representing a slider according to a first embodiment, and Fig. Figure 2 is an exploded view showing the exploded state of the slide. Fig. Figure 3 is a rear view that schematically represents the slide body of a slide valve. Fig. 4 and Fig. 5 are sectional views, each showing a cross-section along the in Fig.3 shown IV-IV line and a cross-section along the in Fig. 4. Schematically represent the VV line shown.

[0020] It should be noted that in the following description, the top / bottom direction refers to the vertical direction of the valve perpendicular to a flat outer surface (top surface) of an upper plate and / or a flat outer surface (bottom surface) of a lower plate of the valve body. In this case, along the top / bottom direction, the direction in which a pull tab is attached relative to the valve body is "top," and the opposite direction is "bottom."

[0021] The forward / backward direction refers to a direction that extends along the sliding direction of the slider when the slider is attached to a zipper and is moved relative to the rows of coupling links; in other words, a longitudinal direction of the slider. In this case, the direction in which the slider is moved to couple the rows of coupling links of the zipper together is forward, and the direction in which the slider is moved to separate the rows of coupling links is backward.

[0022] The left / right direction refers to a direction orthogonal to the up / down direction and to the forward / backward direction, in other words a width direction of the slider.

[0023] A slider 1 for a zipper according to the first embodiment comprises a stop mechanism supported by a stopper claw section 43 of an elastic part 40, which will be described later. The slider 1 according to the first embodiment comprises a slider body 10 formed by pressing (press forming) an aluminum alloy material, an elastic part 40 attached to the slider body 10, and a pull tab 50 containing a shaft section 53 that is attached between the slider body 10 and the elastic part 40. Additionally, the slider 1 according to the first embodiment is a snap-in type slider, in which the elastic part 40 is attached to the slider body 10 using the elastic force of the elastic part 40.

[0024] The slide 1 according to the first embodiment has the slide body 10 as its main feature, and the elastic part 40 and the pull tab 50 used in the slide 1 are not specifically limited. Accordingly, in the first embodiment, the elastic part 40 and the pull tab 50 are described briefly.

[0025] The elastic part 40 of the first embodiment is a leaf spring part made of metal and is designed to be elastically deformable. This elastic part (leaf spring part) 40 is formed by pressing the metal sheet material so that it has a shape in which a vertical section extending along the longitudinal direction of the slide is bent essentially into a C-shape.

[0026] For example, in Fig.As shown in Figure 2, the elastic part 40 comprises a base plate area 41 that presses down on the shaft section 53 of the pull tab 50, a coupling piece area 42 that extends elongately from the front end of the base plate area 41, and the stopper claw section 43 that extends downwards from the rear end of the base plate area 41 and that can be inserted and executed with respect to a coupling element guide passage 17 of the slide body 10.

[0027] The base plate area 41 is provided with a first opening area 41a, which extends through the base plate area 41 along the thickness direction of the base plate area 41, and with a contact area 41b, which extends obliquely from a rear lateral edge opening of the first opening area 41a to the underside and is in contact with a first column section 21 of the slide body 10, which will be described later. The contact area 41b is provided with a second opening area 41c, which extends through the contact area 41b. On the rear side (the side that is closer to the stop claw section 43) of the contact area 41b of the base plate area 41, a third opening area 41d is provided.

[0028] The coupling section 42 of the elastic part 40 comprises a neck section 42a extending from the base plate section 41 and curved downwards, a head section 42b formed integrally with a tip section of the neck section 42a, and an engagement projection section (not shown) projecting posteriorly from the head section 42b. The head section 42b is designed such that its extent in the left / right direction is greater than that of the tip section of the neck section 42a.

[0029] The pull tab 50 according to the first embodiment comprises a thin, plate-like pull tab section 51 in which a through-hole 51a is provided, a pair of left and right arm sections 52 extending from the pull tab section 51, and the shaft section 53, which couples the tip regions of the left and right arm sections 52 together. In the pull tab 50, a pull tab opening region 54, which passes through the pull tab 50 in the thickness direction or in the forward / backward direction of the pull tab 50, is formed by being enclosed by the pull tab section 51, the left and right arm sections 52, and the shaft section 53.

[0030] The slide body 10 of the first embodiment is formed by pressing a material from an aluminum alloy having a composition represented by the general formula: Al a Mg b Mn c Cr d(a, b, c, and d are in wt.%, a is a remainder, 3.9 ≤ b ≤ 6.5, 0 < c ≤ 0.4, 0 < d ≤ 0.3, where an unavoidable impurity may be present). The aluminum alloy is an alloy in which aluminum is the main component. By using an aluminum alloy as the material for the slide body 10, it is possible to achieve a reduction in weight and cost of the slide body 10 compared to the usual slide body, which is made, for example, from a copper-zinc alloy. Additionally, the aluminum alloy, which has a composition represented by the aforementioned general formula, can be referred to as an Al-Mg-based alloy.

[0031] In the first embodiment, the slide body 10 is formed by cold pressing a plate-like material made of an Al-Mg-based alloy, which, for example, has a composition as described above. In this case, it is possible to effect work hardening in an area that undergoes plastic deformation in the slide body 10 due to the aforementioned pressing, and it is thus possible to increase the hardness and strength (in particular the hardness and strength of the receiving area 30 of the slide body 10 described later) of the slide body 10.

[0032] In the aluminum alloy (Al-Mg-based alloy) according to the first embodiment, Mg (magnesium) is present at a concentration of more than 3.9 wt.% and less than or equal to 6.5 wt.%, preferably more than or equal to 4.5 wt.% and less than or equal to 6.0 wt.%. Mg enhances the mechanical properties (strength and hardness) of the Al alloy by dissolving in the Al, which acts as a matrix. By dissolving Mg at a concentration of more than or equal to 3.9 wt.%, it is possible to effectively improve the mechanical properties of the slide body 10. By dissolving Mg at a concentration of less than or equal to 6.5 wt.%, it is possible to ensure stable work hardening of the aluminum alloy. However, if the percentage of Mg exceeds 6.5 wt.%, it becomes impossible to adequately ensure work hardening of the aluminum alloy.

[0033] Manganese (Mn) is present in the aluminum alloy at a concentration of less than 0 wt% and less than or equal to 0.4 wt%. Because the Mn is located within the aluminum matrix, the mechanical properties (strength and hardness) of the aluminum alloy are improved, and the crystal grains are micronized. By keeping the Mn concentration at less than or equal to 0.4 wt%, stable work hardening of the aluminum alloy can be ensured. However, if the Mn concentration exceeds 0.4 wt%, adequate work hardening of the aluminum alloy becomes impossible.

[0034] Chromium (Cr) is present in the aluminum alloy at a concentration of less than 0 wt.% and less than or equal to 0.3 wt.%. Because the Cr is located within the aluminum matrix, the mechanical properties (strength and hardness) of the aluminum alloy are improved, and the crystal grains are broken up into smaller structures. By keeping the Cr content at less than or equal to 0.3 wt.%, it is possible to ensure stable work hardening of the aluminum alloy. However, if the Cr content exceeds 0.3 wt.%, it becomes impossible to adequately ensure work hardening of the aluminum alloy.

[0035] An unavoidable impurity is a permissible impurity present in a minute quantity in the aluminum alloy, arising from its presence in a raw material, from unavoidable mixing during a manufacturing process, etc., and which does not affect the properties of the aluminum alloy. In the present invention, the proportion of impurities permitted as unavoidable impurities is less than or equal to 0.1 wt.%, preferably less than or equal to 0.05 wt.%.

[0036] The slide body 10 according to the first embodiment comprises an upper shield plate 20, a lower shield plate 11 which is arranged at a position away from the upper shield plate 20 parallel to the upper shield plate 20, a guide column 12 which couples a front end section of the upper shield plate 20 and a front end section of the lower shield plate 11 together, a left and a right upper flange area 13 which are arranged on side edge sections of the upper shield plate 20 on the left and on the right side, and a left and a right lower flange area 14 which are arranged on side edge sections of the lower shield plate 11 on the left and on the right side.

[0037] A front end section of the slide body 10 is provided with two shoulder openings 15, arranged on both the left and right sides of the guide column 12. A rear end section of the slide body 10 is provided with a rear opening 16. Additionally, a coupling guide passage 17, essentially Y-shaped, connecting the left and right shoulder openings 15 to the rear opening 16, is formed between the upper shield plate 20 and the lower shield plate 11 of the slide body 10.

[0038] Regarding the rear opening 16 of the slide body 10, the size of a gap between the upper plate 20 and the lower plate 11 along the top / bottom direction is shown, for example, in a rear view ( Fig.3) viewed from the side of the rear opening 16, the opening height (or opening height extent) of the rear opening 16 is referred to as the opening height (or opening height extent). Furthermore, the size of any gap between the left and right upper flange regions 13 or between the left and right upper flange regions 14 in the left / right direction is referred to as the opening width W2 (or opening width extent W2) of the rear opening 16.

[0039] In the slide body 10 of the first embodiment, the guide column 12 is designed to be so thin that a maximum value W1 (maximum width W1) of the extent of the guide column 12 in the left / right direction at a central position with respect to the up / down direction as in Fig.Figure 3 shows that the opening width W2 of the rear opening 16 is smaller. Therefore, in the zipper, when the slider 1 is pushed in one direction to couple the left and right coupling link rows, the left and right coupling links can be stably coupled alternately. Furthermore, if the guide column 12 has an average Vickers hardness of 100 Hv or higher, as described later, even if the guide column 12 is thin in the first embodiment, it is possible to ensure a suitable strength with which the guide column 12 of the slider body 10 can withstand the use of the slider 1.

[0040] On the top plate 20 of the slide body 10, a first column section 21, which is provided to project out at a front end section of the top plate 20, a base area 22, which is provided to surround a base end section of the first column section 21, and on which the base plate area 41 of the elastic part 40 is placed, and a second column section 23, which is provided to project out at a position on the rear of the first column section 21, are provided.

[0041] On the rear side of the base end section of the first column section 21 on the top plate 20, an insertion hole 24 is provided into which the contact section 41b of the elastic part 40 is inserted. On the rear side of the base end section of the second column section 23, a claw hole 25 is provided into which the stop claw section 43 of the elastic part 40 is inserted. The insertion hole 24 and the claw hole 25 extend from the upper surface of the top plate 20 through the coupling element guide passage 17.

[0042] The first column section 21 rises upwards from the upper surface of the upper shield plate 20 and has a hook-shaped form, in which the tip area (upper end area) is bent backwards (see Fig.4) A tip area of ​​the first column section 21 is provided with a protruding section that is inserted into the second opening area 41c of the elastic part 40. The second column section 23 is arranged, with respect to the forward / reverse direction, at a position between the insertion hole 24 and the claw hole 25 of the top shield plate 20. The second column section 23 rises so that it is inclined backward with respect to the upper surface of the top shield plate 20 and is formed in a hook-shaped form, with a tip area (upper end area) bent backward.

[0043] A front end section of the slide body 10 is provided with a receiving area 30 that receives and holds a section (coupling section 42) of the elastic part 40. As, for example, in Fig. 2 and Fig.As shown in Figure 4, the receiving area 30 is formed at a front end section of the upper shield plate 20, at the guide column 12, and at a front end section of the lower shield plate 11. Furthermore, the receiving area 30 is positioned between the left and right shoulder openings 15 in the width direction of the slide such that it extends continuously from the upper surface of the upper shield plate 20 to the lower surface of the lower shield plate 11 along the top / bottom direction.

[0044] The receiving area 30 of the slide body 10 is provided with a concave insertion channel 31, which is recessed towards the rear. This concave insertion channel 31 is provided continuously along the top / bottom direction on at least one section of the front end section of the upper shield plate 20, on the guide column 12, and on at least one section of the front end section of the lower shield plate 11. Furthermore, the concave insertion channel 31 includes a left and a right first inner wall section 32, which are arranged on a front (opening side), a left and a right second inner wall section 34, which are arranged on the rear (deep side) of the first inner wall sections 32 by means of a stepped section 33, and a channel bottom section 35, which is arranged between the rear end sections of the left and the right second inner wall section 34.

[0045] Within the concave inlet channel area 31, a receiving space 39 is provided, which is enclosed by the left and right first inner wall area 32, the left and right step area 33, the left and right second inner wall area 34, and the channel bottom area 35. Since, in the first embodiment, the concave inlet channel area 31 is provided at the receiving area 30, the thickness (wall thickness) of the receiving area 30 is smallest with respect to the front / back direction at a central position or a position near the midpoint between the upper shield plate 20 and the lower shield plate 11 along the top / bottom direction, for example, if a cross-section ( Fig. 4) is viewed orthogonally to the left / right direction, which is located at a central position of the recording area 30 with respect to the left / right direction.

[0046] The concave inlet channel area 31 is designed such that the channel width (the space between the left and right first inner wall area 32) gradually tapers from the first inner wall area 32 on the left side to the first inner wall area 32 on the right side towards the channel bottom area 35.

[0047] The step area 33 supports at least part of the coupling piece area 42 of the elastic part 40 when the elastic part 40 is attached to the slide body 10. For example, if the Fig.As the cross-section shown in Figure 4 is considered, the step section 33 comprises a first step section 33a, which slopes downwards and forwards from an upper end section of the step section 33; a second step section 33b, which extends backwards as a curved section from a lower end section of the first step section 33a; and a third step section 33c, which slopes downwards and forwards from a lower end section of the second step section 33b. In this case, part of the neck section 42a of the coupling section 42 is supported at the elastic part 40 by the first step section 33a of the step section 33.

[0048] The channel bottom area 35 of the concave insertion channel area 31 is provided with a concave inclusion area 35a, which is arranged in a boundary area between the guide column 12 and the lower shield plate 11 and in their vicinity, and has a shape that, viewed in the cross-section of the receiving area 30 shown in the figure, is recessed to the rear. In the first embodiment of the concave insertion channel area 31, a head inclusion area is formed, which encloses the head area 42b and the dome extension area of ​​the elastic part 40, and which is formed by the second step area 33b of the step area 33 and the concave inclusion area 35a of the channel bottom area 35.

[0049] At the bottom of the channel 35 of the concave inlet channel 31, if in the Fig.As shown in the cross-section of the receiving area 30 in Figure 4, a central swell area 35b, where the channel base of the concave insertion channel 31 is formed to swell forward, is provided in an area between the upper shield plate 20 and the lower shield plate 11, and a lower swell area 35c, where the channel base of the concave insertion channel 31 projects forward, is provided at a lower end section of the receiving area 30. Furthermore, the channel base area 35 has a shape that is slightly curved towards the upper surface of the upper shield plate 20 and is relatively smooth throughout with respect to the upper surface of the upper shield plate 20. A curved area 35d, bent at an acute angle, is provided between the channel base area 35 of the concave insertion channel 31 and the lower surface of the lower shield plate 11.

[0050] For example, if a section is considered that results when the receiving area 30 is cut along a direction orthogonal to the top / bottom direction at the midpoint between the upper shield plate 20 and the lower shield plate 11 along the top / bottom direction, the channel bottom area 35 of the concave inlet channel area 31 is as shown in Fig. Figure 5 is shown, arranged in a central part of the recording area 30 with respect to the left / right direction. In the first embodiment, the Fig. The section shown in Figure 5, which results when the recording area 30 is cut in a direction orthogonal to the top / bottom direction at a position in the middle between the upper shield plate 20 and the lower shield plate 11 with respect to the top / bottom direction, is referred to as the “reference cross section” as described above.

[0051] In the first embodiment, the channel bottom area 35 of the concave inlet channel area 31 has a reference cross-section which is in Fig. Figure 5 shows a concave first bottom surface, which is designed to be concave in a central area in the left / right direction with respect to the receiving space 39, and a left and a right concave second bottom surface, which are arranged on both, the left and the right sides of the first bottom surface, and which are designed to swell towards the receiving space 39. It should be noted that in the present invention, the bottom surface of the channel bottom area 35 of the concave inlet channel area 31 can be designed as a concave continuously curved surface, in which the entire bottom surface in the aforementioned section area with respect to the receiving space 39 can be recessed into a circular arc shape.

[0052] Additionally, at the Fig.Figure 5 shows a reference cross-section of the receiving area 30 with a bent or curved section between the first inner wall sections 32 and the step sections 33, between the step sections 33 and the second inner wall sections 34, and between the second inner wall sections 34 and the channel bottom section 35, wherein the bent and curved sections significantly alter the angle of inclination of the inner wall surface of the concave inlet channel section 31 with respect to the forward / backward direction. For example, in the first embodiment, the angle of inclination with respect to the forward / backward direction is altered by more than or exactly 30° at each of the bent or curved sections of the receiving area 30, relative to the inner wall surface at the front of the bent or curved section and the inner wall surface at the rear of the bent or curved section.

[0053] In the first embodiment, in Fig. The reference cross-section shown in Figure 5 of the receiving area 30, with respect to the central position of the slide body 10, is formed in a left-right symmetrical shape along the left / right direction and is essentially U-shaped. The left and right front end sections of the reference cross-section each have a curved surface that curves forward in a convex shape.

[0054] In the reference cross-section, the left and right step sections 33 provided at the receiving area 30 are arranged parallel or substantially parallel to the left / right direction. With step sections 33 provided in this way, a stable gap between the left and right first inner wall sections 32 can be ensured. Additionally, it is possible to ensure a suitable thickness (in particular, the thickness of a region on the back side of the step sections 33) of the receiving area 30 between the inner wall surface facing the receiving space 39 and the outer surface facing the dome member guide passage 17, and it is possible to increase the strength of the receiving area 30.

[0055] This involves the following: Fig.In the reference cross-section shown in Figure 5, the extent of the receiving area 30 (guide column 12) in the forward / backward direction at a central position with respect to the width of the slide is designated as "central length extent A", and the extent of the receiving area 30 (guide column 12) in the forward / backward direction from the position of the front edge to the position of the rear edge is designated as "maximum length extent B". Furthermore, the extent of the receiving area 30 (guide column 12) in the forward / backward direction from the position of the front edge to the curved area between the first inner wall areas 32 and the step areas 33 is designated as "receiving area extent C". Finally, as described above, the maximum value of the extent of the receiving area 30 with respect to the left / right direction is designated as "maximum width extent W1".

[0056] In the reference cross-section, the receiving area 30 (guide column 12) of the first embodiment has an arrangement relationship such that "central longitudinal extent A < (maximum longitudinal extent B - central longitudinal extent A)". Because the receiving area 30 (guide column 12) is designed according to this arrangement relationship, it is possible, as described later, to press a sheet material made of an aluminum alloy during the forming of the slide body 10 in such a way that processing hardening of the aluminum alloy effectively occurs, thereby increasing the strength of the receiving area 30 (in particular the guide column 12) of the slide body 10.

[0057] Additionally, the guide column 12 preferably has an arrangement relationship such that "0.60 ≤ (maximum linear expansion B - central linear expansion A) / maximum linear expansion B ≤ 0.75". With a value for (maximum linear expansion B - central linear expansion A) / maximum linear expansion B of more than or equal to 0.60, it is possible to further improve the hardening properties and stiffness of the aluminum alloy. Furthermore, with a value for (maximum linear expansion B - central linear expansion A) / maximum linear expansion B of less than or equal to 0.75, it is possible to design the guide column 12 with a suitable wall thickness, thus ensuring stable strength of the guide column 12.

[0058] In the first embodiment, the receiving area 30 (guide column 12) has an arrangement relationship such that "0.2 × maximum linear expansion B ≤ receiving area expansion C ≤ 0.6 × maximum linear expansion B". With a receiving area expansion C that is more than or equal to 20% of the maximum linear expansion B, it is possible to stably receive the coupling section 42 of the elastic part 40 within the receiving area 30. This protects the elastic part 40 within the receiving area 30 and prevents it from easily deforming. Additionally, it allows for effective hardening of the aluminum alloy during processing.

[0059] With a receiving area dimension C that is less than or equal to 60% of the maximum linear dimension B, it is possible to ensure a suitable wall thickness of the guide column 12 and to ensure that the guide column 12 has stable strength. In the present invention, the receiving area 30 of the slide body 10 can be designed without provided step sections 33.

[0060] According to the first embodiment, the receiving area 30 (guide column 12) has an arrangement relationship such that "maximum lateral extent W1 ≥ maximum longitudinal extent B". Accordingly, it is easily possible to design the guide column 12 with a suitable thickness in the lateral direction and to ensure its stability. Furthermore, since it is possible to prevent excessive longitudinal extension of the guide column 12 in the forward / reverse direction, it is possible to stably couple the left and right coupling elements alternately by sliding the slider 1 on the zipper and to easily separate the coupled left and right coupling elements from each other.

[0061] Next, a method for manufacturing the slide body 10 according to the first embodiment is described.

[0062] First, a round wire (wire material) made of an aluminum alloy (Al-Mg-based alloy), whose composition is given by the general formula described above, is prepared. This round aluminum alloy wire is then processed, including single or multiple cold rolling, hot rolling, or similar operations, to produce a sheet-like material of a predetermined thickness for pressing (raw material).

[0063] The next step involves an annealing process in which the sheet-like material produced for pressing is subjected to an annealing treatment. In this annealing step, the sheet-like material is heat-treated in an electric furnace at a temperature of 200°C or higher and 400°C or lower for a treatment time of 60 minutes or more and 600 minutes or less, immediately before pressing to form the slide body 10. By subjecting the sheet-like material to an annealing (heat treatment) under these conditions, it is possible to remove residual stresses that arise in the sheet-like material from rolling and similar processes.This makes it possible, when forming the slide body 10 by pressing, as described later, to prevent the formation of shape defects, such as cracks, in the sheet-like material for pressing that has undergone the annealing treatment. It should be noted that the present invention does not specifically restrict a particular method and means for carrying out the annealing treatment, and that the sheet-like material for pressing can be heated, for example, by means of a heating device other than an electric oven.

[0064] After the annealing treatment described above has been carried out, a pressing step is performed on the sheet-like material that has undergone the annealing process. This pressing step involves multiple pressing operations, including at least one shearing and one bending operation. During this pressing step, multiple pressing operations are performed under cold conditions (for example, at room temperature) according to a predetermined sequence, resulting in a slide body 10, such as the one described above. Fig. 2 to 5 are shown, and are manufactured.

[0065] In particular, to form the receiving area 30 of the slide body 10 according to the pressing step of the first embodiment, at least one cold pressing (cold plastic deformation) is carried out, wherein, with respect to the plate-like material for pressing or with respect to a shaped intermediate body formed from the plate-like material for pressing, the pressing is carried out locally from one direction of the front of the slide body 10. By carrying out such cold pressing, whereby the aluminum alloy partially deforms plastically, it is possible to stably form the receiving area 30 of the slide body 10 into the predetermined shape described above.Furthermore, because the receiving area 30 is plastically deformed during this cold pressing, in particular because the receiving area is plastically deformed in such a way that the reference cross-section mentioned above has a shape and size as described above, it is possible to effectively effect a processing hardening of the receiving area 30 and to increase the hardness of the receiving area 30 of the slide body 10.

[0066] By performing a pressing step as described above, it is possible to manufacture the slide body 10 from the aluminium alloy by providing the receiving area 30 at the front end section.

[0067] It is then possible to use slider 1, as for example in Fig. 1 shown, to be produced by attaching the pull tab 50 and the elastic part 40 to the manufactured slide body 10.

[0068] According to the first embodiment, for example, when the slide 1 is assembled from the slide body 10, the pull tab 50 and the elastic part 40, the pull tab 50 is first placed on the surface side of the top plate 20 of the slide body 10. At this point, the shaft section 53 of the pull tab 50 is inserted between the first column section 21 and the second column section 23 of the slide body 10.

[0069] Subsequently, the elastic part 40 is placed on the slide body 10 in a direction in which the shaft section 53 of the pull tab 50 is covered by the base plate area 41 of the elastic part 40, and in which the contact piece area 41b of the stopper claw section 43 of the elastic part 40 is inserted into the insertion hole 24 and the claw hole 25 of the top shield plate 20, respectively.

[0070] Subsequently, the base plate area 41 of the elastic part 40 is pressed towards the slide body 10, and the contact piece area 41b of the elastic part 40 is pressed downwards as it elastically deforms and thus penetrates the insertion hole 24 of the upper shield plate 20, establishing pressure contact with the first column section 21. At the same time, the coupling piece area 42 of the elastic part 40 is pressed downwards as it is guided along the concave insertion groove area 31 of the receiving area 30, which is provided at the front end section of the slide body 10.

[0071] At this time, the head section 42b, provided at the elastic part 40, is guided through the first step section 33a provided at the receiving area 30. As the coupling section 42 moves downwards while elastically deforming, the head section 42b continues to move over the first step section 33a to the lower side of the first step section 33a, and the coupling section 42 thereby elastically returns to its original shape. Accordingly, the head section 42b and the dome extension section (not shown) of the coupling section 42 are each enclosed by the second step section 33b and the concave inclusion section 35a at the receiving area 30 of the slide body 10.As described above, in the first embodiment of the slider 1 it is possible to easily attach the elastic part 40 to the slider body 10 by snapping it into place using the elastic force of the elastic part 40, without the slider body 10 being plastically deformed by pressing.

[0072] In the case of the slide 1 manufactured as described above according to the first embodiment, which is in Fig.As shown in Figure 1, the hardness of the receiving area 30 provided on the slide body 10 is increased throughout the entire receiving area 30 by the work hardening of the aluminum alloy due to the cold pressing described above. More precisely, the hardness of the receiving area 30 can be described as follows: if the Vickers hardness of the guide column 12, which forms the receiving area 30 on the slide body 10, is measured at several points on the guide column 12 in the first embodiment, the guide column 12 will have an average Vickers hardness greater than or equal to 100 Hv.

[0073] It should be noted that the Vickers hardness of the guide column 12 comprises a measurement obtained by measuring the Vickers hardness on the outer surface of the guide column 12, and a measurement obtained by measuring the Vickers hardness on a section of the guide column 12, which is created, for example, when the slide body 10 is cut along a predetermined direction (for example, the forward / backward direction or the left / right direction).

[0074] In this case, the average Vickers hardness of the guide column 12 is obtained by measuring the Vickers hardness of areas at at least two locations, preferably at at least three or more locations on the guide column 12, and calculating the average of these measurements. Using the average Vickers hardness of the guide column 12 obtained in this way, it is possible to determine the Vickers hardness of the guide column 12 as a whole, even if the Vickers hardness measured at different locations on the guide column 12 varies.

[0075] For example, in the first embodiment of the slide body 10, a central area of ​​the guide column 12 with respect to the left / right direction is largely plastically deformed by pressing during the manufacture of the slide body 10, and the Vickers hardness of the guide column 12 is thus preferably at a section sector (see Fig.4) measured, which is obtained when the slide body 10 is cut along the forward / backward direction and the up / down direction at a point in the central region of the guide column 12 with respect to the left / right direction. Furthermore, the average Vickers hardness of the guide column 12 is preferably obtained by measuring the Vickers hardness at, for example, each region at two points on an upper end section and a lower end section of the guide column 12, each region at three points on an upper end section, a central end section and an end section of the guide column 12, or each region at four or more points in the aforementioned cutting sector ( Fig. 4) of the guide column 12, which differ from each other. In this case, it is possible to determine this by measuring the Vickers hardness at a large number of areas in the aforementioned cutting sector ( Fig.4) and by calculating an average from a large number of measurements, it is possible to obtain a more accurate average value of the Vickers hardness. It should be noted that the Vickers hardness of the guide column 12 can be measured at a different section of the guide column 12 than the section shown in the figure, for example, at a section that results when the slide body 10 is cut in the forward / backward and left / right directions at a point in the central region of the guide column 12 with respect to the top / bottom direction.

[0076] In the first embodiment, the Vickers hardness of the guide column 12 is measured using a micro Vickers hardness tester (HM-103, manufactured by Mitutoyo Corporation) under test conditions where the test load is 100 gf and the load time is 15 seconds.

[0077] Because the slide body 10 in the first embodiment is made of the aluminum alloy, the strength of the guide column 12 can be increased, since the guide column 12 of the receiving area 30, as described above, has a high average Vickers hardness greater than or equal to 100 Hv. This guide column 12 has a higher Vickers hardness than the top plate 20 (in an area other than the first column section 21 and the second column section 23) and the bottom plate 11. Additionally, in the first embodiment, the Vickers hardness and the strength of an area (an area encompassing the guide column 12) along the concave insertion groove 31 of the receiving area 30 are also increased, since the concave insertion groove 31 of the receiving area 30 is formed by pressing. In this case, the strength of the guide column 12 and the strength of the receiving area 30 include tensile strength.

[0078] In the first embodiment, the strength of the slide body 10 can be expressed quantitatively, for example, by performing a strength test (tensile test) in which the change in the opening height of the rear opening 16 of the slide body 10 is measured, as described, for example, below. In the strength test, the slide body 10 of the first embodiment, made of the aluminum alloy, has a strength such that the change (quantity of change) in the opening height of the rear opening 16 is less than 1 mm, preferably less than or equal to 0.8 mm.

[0079] Here, the strength test (tensile test), in which the change in the opening height of the rear opening 16 is measured, is specifically described with reference to Fig. 6 described.

[0080] A test device 60, with which the strength test is carried out, comprises a slide mounting area 61, on which the slide body 10 to be tested is attached and fastened so that the upper plate 20 and the lower plate 11 are parallel to the horizontal direction, a pull tab holding area 62, which is arranged so that it can be moved along the up / down direction with respect to the slide mounting area 61 and which holds the pull tab 50, and a measuring area (not shown) which measures a load acting on the pull tab 50 through the pull tab holding area 62.

[0081] When carrying out the strength test with the in Fig. In the test device 60 shown, the opening height (the size of a gap between the upper shield plate 20 and the lower shield plate 11 of the rear opening 16 with respect to the top / bottom direction) of the rear opening 16 of the slide body 10, which is to be measured, is first measured.

[0082] After the opening height of the rear opening 16 has been measured, the slide body 10 to be measured is attached to a tip area of ​​the slide mounting area 61 as shown in Fig. Figure 6 shows the slide body 10 attached and fastened. At this time, the slide body 10 is attached to the slide mounting area 61 such that the tip of the slide mounting area 61 is inserted through the rear opening 16 of the slide body 10 into the coupling element guide passage 17. Furthermore, when attaching the slide body 10 to the slide mounting area 61, the tip of the slide mounting area 61 is inserted on the deep side (front side) with respect to the position of the pull tab 50. It should be noted that when the slide body 10 is attached to the slide mounting area 61, the tip of the slide mounting area 61 and the guide column 12 of the slide body 10 are preferably located apart from each other.

[0083] Next, the pull tab 50 of the slide 1 is attached to the pull tab retaining area 62, and the pull tab 50 is held by the pull tab retaining area 62 with respect to the vertical direction so that it forms an angle of 90° with the horizontal direction (or the top plate 20 of the slide body 10). At this point, as in Fig.Figure 6 shows the pull tab 50 being held by the pull tab retaining area 62 such that a value “L2 / L1”, which denotes a ratio between the pull tab retaining distance L2 and a total length L1 of the slide body 10, is greater than or equal to 0.50 and less than or equal to 0.65, wherein the total length L1 of the slide body 10 is an extension of the slide body 10 from the front end position to the rear end position in the forward / backward direction and the pull tab retaining distance L2 is an extension of the slide body 10 from the front end position to the central position of the shaft section 53 of the pull tab 50 in the forward / backward direction.

[0084] The pull tab retaining area 62 is then moved upwards and the pull tab 50 is pulled towards the upper side, thereby exerting a load on the pull tab 50, and the load acting on the pull tab 50 is then gradually increased. At the same time, the load acting on the pull tab 50 is measured at a measuring range (not shown).

[0085] When the load acting on the pull tab 50 reaches a predetermined and preset value, the application of the load to the pull tab 50 is stopped by the pull tab retaining area 62. In the first embodiment, the maximum load acting on the pull tab 50 is set to 120 N, and the application of the load to the pull tab 50 is stopped when the load acting on the pull tab 50 reaches 120 N.

[0086] After the application of the load has stopped, the acting load is removed and the pull tab 50 is separated from the pull tab retaining area 62. Then, the opening height of the rear opening 16 of the slide body 10 is measured after the application of the load, and a difference between the opening height of the rear opening 16 before the application of the load (in other words, before the pull test) and the opening height of the rear opening 16 after the application of the load (in other words, after the pull test) is calculated, whereby a difference in the opening height of the rear opening 16 results from the deformation of the slide body 10.

[0087] It should be noted that the change in the opening height of the rear opening 16 between the time before and after the application of the load to the slide body 10 can be referred to as the opening quantity of the rear opening 16. Furthermore, when measuring the opening quantity of the rear opening (16) of the slide body (10), it may be difficult to hold the pull tab (50) in place by the pull tab holding area 62 of the test device 60 in such a way that the value of the "L2IL1" described above is in the range of more than or equal to 0.50 and less than or equal to 0.65, depending on the attachment position of the pull tab (50) relative to the slide body (10). In this case, the measured opening quantity increases when the value “L2 / L1” increases, and the measured opening quantity decreases when the value “L2 / L1” decreases, even if, for example, the strength of the guide column (12) of the slide body (10) remains the same.Therefore, if the value “L2 / L1” described above is outside the range of more than or equal to 0.50 and less than or equal to 0.65, it is necessary to take the value “L2 / L1” into account and, for example, to correct the strength (strength of the guide column (12)) of the slide body (10), which follows from the measured opening quantity of the slide body (10).

[0088] In the first embodiment of the slider body 10, made of aluminum alloy, the guide column 12 of the slider body 10 has a high Vickers hardness of 100 Hv or higher, as described above. Therefore, when a strength test is performed as described above, in which the opening of the rear opening 16 of the slider body 10 is measured, the slider body 10 of the first embodiment can exhibit high strength (opening strength) such that the opening of the rear opening 16 is less than 1 mm, preferably less than or equal to 0.8 mm. The slider 1 of the first embodiment with such high opening strength can prevent the slider body 10 from deforming to such an extent that the opening height of the rear opening 16 increases to the point of rendering it unusable when a load is applied to the slider body 10 during the sliding action of the slider 1 in the zipper.

[0089] Accordingly, the slider 1 of the first embodiment, even when used in a zipper, can perform its function appropriately for a long period of time. Furthermore, since the slider body 10 is formed by pressing an aluminum alloy, it is easily possible to achieve a weight reduction of the slider body 10 compared to conventional general slider bodies, which are made, for example, of a copper-zinc alloy, and thus to supply the slider 1 at a low price. Moreover, since a recycled alloy can also be used as the aluminum alloy forming the slider body 10, it is possible to supply the slider 1 with consideration for the global environment. (Second embodiment)

[0090] Fig. Figure 7 is a top view schematically illustrating a slide according to a second embodiment. Fig.8 is a sectional view showing a cross-section along the Fig. 7 shows line VIII-VIII schematically represents, and Fig. 9 is a sectional view showing a cross-section along the Fig. The line IX-IX shown in section 8 schematically represents a sliding body.

[0091] A slider 2 for a zipper, according to the second embodiment, comprises a slider body 70 formed by pressing (press forming) a material made of an aluminum alloy, an elastic part 100 attached to the slider body 70, and a pull tab 110 comprising a shaft section 113 fixed between the slider body 70 and the elastic part 100. The slider 2 according to the second embodiment is a caulking slider 2, in which, when the elastic part 100 is in the state in which it is attached to the slider body 70, a portion of the slider body 70 is compressed to plastically deform, thus attaching the elastic part 100 to the slider body 70.

[0092] The elastic part 100 of the second embodiment is a leaf spring part made of a metal designed to deform elastically. The elastic part 100 comprises a substantially U-shaped pull tab retaining area 101, which presses the shaft section 113 of the pull tab 110 from above; a base plate area 102, which extends forward from the pull tab retaining area 101; a coupling section 103, which extends longitudinally from the front end of the base plate area 102; and a stopper claw section 104, which extends downward from the rear end of the pull tab retaining area 101 and which is insertable and extrudable with respect to the coupling element guide passage of the slide body 70.

[0093] The pull-tab retaining area 101 of the elastic part 100 is provided with an opening area 101a that extends through the pull-tab retaining area 101 in the thickness direction of the elastic part 100. In a side view, where the elastic part 100 is viewed from one side, the coupling area 103 is substantially L-shaped, extending forward from the base plate area 102 and continuing downward by curving. The coupling area 103 is designed such that its left / right extension from a base end section connected to the base plate area 102 to a tip section located on a front end section of a bottom shield plate 71 is constant or substantially constant.

[0094] The pull tab 110 of the second embodiment comprises a thin, plate-like pull tab section 111 in which a through-hole 111a is provided, a pair of left and right arm sections 112 extending from the pull tab section 111, and the shaft section 113, which couples the tip regions of the left and right arm sections 112 together. A pull tab opening region 114 is formed by being enclosed by the pull tab section 111, the left and right arm sections 112, and the shaft section 113 of the pull tab 110.

[0095] It should be noted that in the second embodiment of the slider 2, the elastic part 100 and the pull tab 110 are not specifically restricted.

[0096] In the second embodiment, the slide body 70 is formed by pressing a material made of an aluminum alloy (Al-Mg-based aluminum alloy) similarly to the slide body 10 in the first embodiment. Accordingly, as with the slide body 10 of the first embodiment, it is also possible in the second embodiment to achieve processing hardening in a portion of the plate material made of an Al-Mg-based alloy that has been plastically deformed by cold pressing.

[0097] According to the second embodiment, the slide 70 comprises an upper shield plate 80 and a lower shield plate 71 arranged parallel to each other, a guide column 72 that couples a front end section of the upper shield plate 80 and a front end section of the lower shield plate 71, a left and a right upper flange region 73 arranged on side edge sections on the left and right sides of the upper shield plate 80, and a left and a right lower flange region 74 arranged on side edge sections on the left and right sides of the lower shield plate 71. In the second embodiment, the guide column 72 is designed to be so thin that the maximum width W1 at the position in the middle of the guide column 72 with respect to the top / bottom direction is smaller than the opening width of a rear opening 76 of the slide body 70.

[0098] On the top plate 80 of the slide body 70, a pair of left and right first column sections 81 are arranged, which are provided to project from a front end section of the top plate 80, and a second column section 82 is arranged, which is provided to project from a position on the rear side of the first column sections 81. On the rear side of a base end section of the second column section 82, a claw hole 85 is provided, into which the stop claw section 104 of the elastic part 100 is inserted. The left and right first column sections 81 and the second column section 82 rise upwards from the upper surface of the top plate 80 and each have a hook-like shape, with a tip region (upper end region) bent backwards (see Fig. 8).

[0099] A front end section of the slide body 70 is provided with a receiving area 90 that receives and holds part of the elastic part 100. For example, in Fig. As shown in Figure 8, the receiving area 90 is formed at a front end section of the upper shield plate 80, at the guide column 72, and at a front end section of the lower shield plate 71. The receiving area 90 is formed at a position between the left and right shoulder openings with respect to the width direction of the slide, extending continuously from the upper surface of the upper shield plate 80 to the lower surface of the lower shield plate 71 along the top / bottom direction.

[0100] The receiving area 90 is provided with a concave insertion groove area 91, which is recessed at the rear. For example, if a cross-section of the receiving area 90 is viewed orthogonally to the top / bottom direction at a position midway between the upper shield plate 80 and the lower shield plate 71 along the top / bottom direction (see Fig.9) This concave inlet channel area 91 comprises a left and a right first inner wall area 92, arranged on the front side, a left and a right second inner wall area 94, each arranged by means of a step area 93 on the rear side of the first inner wall areas 92, and a channel bottom area 95, which is formed as a curved area extending from the rear end sections of the left and the right second inner wall areas 94. Additionally, a receiving space 99 is provided within the concave inlet channel area 91, which is enclosed by the left and the right first inner wall areas 92, the left and the right step areas 93, the left and the right second inner wall areas 94, and the channel bottom area 95.

[0101] The concave inlet channel area 91 is designed such that the channel width gradually tapers from the first inner wall area 92 on the left side to the first inner wall area 92 on the right side towards the channel bottom area 95. The step area 93 supports at least part of the coupling section 103 of the elastic part 100 when the elastic part 100 is attached to the slide body 70.

[0102] Furthermore, in the second embodiment of the slide body 70, the following applies: Fig. The section sector shown in Figure 9, which results when the recording area 90 is cut along a direction orthogonal to the top / bottom direction at a position midway between the upper shield plate 80 and the lower shield plate 71 along the top / bottom direction, is referred to as the "reference cross-section". It should be noted that in the Fig.9 shown reference cross-section of the second embodiment, the reference cross-section has a shape that corresponds to that before the elastic part 100 is attached to the slide body 70, in other words, a shape of the reference cross-section before the receiving area 90 is pressed and plastically deformed.

[0103] In the reference cross-section shown in the figure, the receiving area 90, according to the second embodiment, has a shape that is symmetrical left-right with respect to the central position of the slide body 70 in the left / right direction and is essentially U-shaped. Furthermore, in the reference cross-section, the left and right front end sections of the receiving area 90 each have a curved surface that curves forward into a convex shape. The left and right step sections 93 are arranged parallel or substantially parallel to the left / right direction.

[0104] As described above, the slide body 70 according to the second embodiment is designed as a slide body 70 of a plastic deformation type, in which a part of the slide body 70 plastically deforms and the elastic part 100 is attached. Therefore, when the elastic part 100 is to be attached to the receiving area 90 of the slide body 70 as described below in a state in which the coupling section 103 of the elastic part 100 is in contact with the left and right step sections 93 provided on the receiving area 90, the left and right front end sections of the receiving area 90 are pressed backwards from the front and inwards with respect to the left / right direction, and the left and right front end sections of the receiving area 90 are, as indicated by the solid lines in Fig.9 indicated, each plastically deformed into a shape that extends inwards in a wider direction than the first inner wall areas 92. Accordingly, a part of the dome section 103 of the elastic part 100 is held by the left and right step sections 93 of the receiving area 90 and the plastically deformed left and right front end sections of the receiving area 90, and it is thus possible to attach the elastic part 100 to the slide body 70 in such a way that it is elastically deformable.

[0105] As in the case of the reference cross-section of the first embodiment, the “central longitudinal extent A”, the “maximum longitudinal extent B”, the “receiving area extent C” and the “maximum lateral extent W1” are each defined for the reference cross-section of the second embodiment (see Fig.9) It should be noted that in the second embodiment, the respective values ​​of the “central length expansion A”, the “maximum length expansion B”, the “receiving area expansion C” and the “maximum width expansion W1” denote the size in a state in which the elastic part 100 is attached to the slide body 70.

[0106] In this case, the receiving area 90 (guide column 72) of the second embodiment has an arrangement relationship at the reference cross-section where "central longitudinal extent A < (maximum longitudinal extent B - central longitudinal extent A)". Additionally, as in the case of the first embodiment, the receiving area 90 (guide column 72) has an arrangement relationship where "0.60 ≤ (maximum longitudinal extent B - central longitudinal extent A) / maximum longitudinal extent B ≤ 0.75", an arrangement relationship where "0.2 × maximum longitudinal extent B ≤ receiving area extent C ≤ 0.6 × maximum longitudinal extent B", and an arrangement relationship where "maximum lateral extent W1 ≥ maximum longitudinal extent B". With these arrangement relationships, the receiving area 90 (guide column 72) can lead to similar effects as the effects of the sliding body 10 of the first embodiment.

[0107] Such a slide body 70 according to the second embodiment can be manufactured using a manufacturing process that is essentially similar to the manufacturing process used to manufacture the slide body 10 of the first embodiment.

[0108] In particular, a plate-like material (raw material) of a predetermined thickness is first produced for pressing by cold rolling or hot rolling a round wire (wire material) made of an aluminum alloy (Al-Mg based alloy) that is the same as that of the first embodiment.

[0109] Next, an annealing treatment is performed on the produced plate-like material for pressing under the same conditions as in the first embodiment, thereby removing any residual stresses in the plate-like material. The plate-like material for pressing, which has undergone the annealing treatment, is then pressed multiple times, with each pressing step comprising at least shearing and bending, thereby producing the slide body 70 according to the second embodiment. In this pressing step of the second embodiment, it is possible to stably form the receiving area 90 of the slide body 70 by performing at least one cold pressing operation, and to effect work hardening of the receiving area 90 and increase its hardness.

[0110] Then the slider 2, as for example in Fig. 7 and Fig.8 shown, produced by attaching the pull tab 110 and the elastic part 100 to the manufactured slide body 70.

[0111] In the second embodiment, when assembling the slide 2 using the slide body 70, the pull tab 110, and the elastic part 100, the pull tab 110 is first placed on the top plate 80 of the slide body 70. Subsequently, the elastic part 100 is placed on the slide body 70 in a direction in which the shaft section 113 of the pull tab 110 is covered by the pull tab retaining area 101 of the elastic part 100, and in which the stop claw section 104 of the elastic part 100 is inserted into the claw hole 85 of the top plate 80. Furthermore, at this time the coupling section 103 of the elastic part 100 is inserted into the concave insertion channel section 91, which is provided at the receiving area 90 of the slide body 70, and brought into contact with the left and right step sections 93 of the receiving area 90.

[0112] Subsequently, the left and right front end sections of the receiving area 90 are pressed backwards from the front and inwards along the left / right direction, causing the left and right front end sections of the receiving area 90 to deform plastically, as indicated by the solid lines in the figure. Accordingly, a portion of the coupling section 103 of the elastic part 100 is held by the left and right step sections 93 of the receiving area 90 and the plastically deformed left and right front end sections of the receiving area 90, and the elastic part 100 can be attached to the slide body 70 in such a way that it is elastically deformable.

[0113] In the second embodiment of the slide body 2, manufactured as described above, the guide column 72 formed on the slide body 70 can have an average Vickers hardness of 100 Hv or higher. Furthermore, the guide column 72 has a higher Vickers hardness than the upper shield plate 80 (at a different point than the first column section 81 and the second column section 82) and the lower shield plate 71. Therefore, in the second embodiment, it is possible to increase the strength of the guide column 72 and the strength of a section along the concave insertion groove 91 of the receiving area 90. In particular, the slide body 70 according to the second embodiment can have a strength such that a change in the opening height of the rear opening 76 is less than 1 mm (preferably less than or equal to 0.8 mm) when a strength test similar to that performed in the first embodiment is carried out (see Fig. 6).

[0114] Accordingly, as with slider 1 of the first embodiment, slider 2 of the second embodiment can also perform its function appropriately for a long period of time when used on a zipper. Furthermore, since the slider body 70 is formed by pressing an aluminum alloy, it is possible to achieve a reduction in the weight of the slider body 70 and a reduction in the cost of the slider 2.

[0115] It should be noted that, as described above, the slide body 10 of the first embodiment and the slide body 70 of the second embodiment are both formed from an Al-Mg-based alloy. However, in the present invention, the slide body can be made from an aluminum alloy instead of an Al-Mg-based alloy, having a composition given by the following general formula: Al e Mg f Si gCu h Cr i (e, f, g, h and i are in wt.%, e is a residue, 0.8 ≤ f ≤ 2.0, 0.4 ≤ g ≤ 0.9, 0.15 ≤ h ≤ 0.8, 0 < i ≤ 0.45, and an unavoidable impurity may be present). The aluminum alloy represented by such a general formula can be called an Al-Mg-Si-based alloy.

[0116] Together with Si, Al and Cu, or Al, Cu and Si, Mg (magnesium) forms a tiny intermetallic compound in the Al-Mg-Si-based alloy. When subjected to heat treatment, it can improve the mechanical properties (strength and hardness) of the Al alloy. Additionally, by dissolving Mg in Al, which acts as a matrix, the effect of improving the mechanical properties (strength and hardness) of the Al alloy can be achieved.

[0117] Furthermore, Mg is present in the Al alloy at a concentration of more than or equal to 0.8 wt.% and less than or equal to 2.0 wt.%, preferably more than or equal to 0.8 wt.% and less than or equal to 1.2 wt.%. The presence of Mg in this range prevents softening of the Al alloy in a step (washing, drying, or similar) where heat treatment is applied after cold working. In particular, a reduction in the strength of the Al alloy due to heat treatment can be prevented, since the intermetallic compound arranged in the Al matrix, achieved through thermal heat treatment, prevents the movement of a dislocation originating from cold rolling. Moreover, since the percentage of Mg is more than or equal to 0.8 wt.%, the effect of preventing strength loss can be reliably achieved. With a percentage of Mg of less than or equal to 2.0 wt.%, the effect of preventing strength loss is significantly reduced.-% The work hardening of the aluminium alloy can be stably ensured, whereas if the percentage of Mg is more than 2.0 wt.%, the aluminium alloy has a lower work hardenability and is therefore not suitable as a material for the slide bodies 10 and 70.

[0118] Together with Mg, or together with Al, Cu, and Mg, Si (silicon) forms a very small intermetallic compound when subjected to thermal hardening after being dissolved in the Al matrix, and can improve the mechanical properties (strength and hardness) of the Al alloy. Si is present in the Al alloy at more than or equal to 0.4 wt.% and less than or equal to 0.9 wt.%, preferably at more than or equal to 0.4 wt.% and less than or equal to 0.8 wt.%. With a percentage of Si in the range described above, softening of the Al alloy in a step (washing, drying, or similar) in which heat is applied after cold working can be prevented.In particular, a reduction in the strength of the aluminum alloy due to heat treatment can be prevented because silicon (atoms) arranged in the aluminum matrix by thermal hardening, or an intermetallic compound of silicon and magnesium, prevents the movement of a dislocation originating from cold rolling. With a silicon content of more than or equal to 0.4 wt.%, the effect of preventing a reduction in strength can be reliably achieved, and the mechanical properties (strength and hardness) of the aluminum alloy can be effectively improved. With a silicon content of less than or equal to 0.9 wt.%, coarse arrangement or crystallization of the elemental silicon can be prevented, and expansion during plastic deformation can be easily ensured, whereas with a silicon content of more than 0.9 wt.%...-% the aluminum alloy has a lower workability and is therefore not suitable as a material for the slide bodies 10 and 70.

[0119] As a simple element, or in combination with Al and Mg, or with Al, Mg, and Si, Cu (copper) forms a minute deposit or an intermetallic compound when subjected to thermal hardening after it has dissolved in the Al matrix, and can improve the mechanical properties (strength and hardness) of the Al alloy. Cu is present in the Al alloy at more than or equal to 0.15 wt.% and less than or equal to 0.8 wt.%, preferably at more than or equal to 0.15 wt.% and less than or equal to 0.4 wt.%. The percentage of Cu in the range described above prevents softening of the Al alloy in a step (washing, drying, or similar) where heat is applied after cold working.In particular, a reduction in the strength of the aluminum alloy due to heat treatment can be prevented, since copper atoms arranged in the aluminum matrix by thermal hardening prevent the movement of dislocations originating from cold rolling. With a copper content of more than or equal to 0.15 wt.%, the effect of preventing a reduction in strength can be reliably achieved. With a copper content of less than or equal to 0.8 wt.%, the work hardening and corrosion resistance of the aluminum alloy can be reliably ensured, whereas with a copper content of more than 0.8 wt.%, the aluminum alloy has lower work hardening and poorer corrosion resistance and is therefore unsuitable as a material for the slide bodies 10 and 70.

[0120] Chromium (Cr) is present in the aluminum alloy at a concentration of more than 0 wt.% and less than or equal to 0.45 wt.%. Because the Cr is located on the inside of the alloy, with the aluminum acting as a matrix, the mechanical properties (strength and hardness) are improved, and the effect of the crystal grains breaking up into small structures is achieved. If the Cr content in the aluminum alloy exceeds 0.45 wt.%, adequate work hardening of the aluminum alloy is not possible.

[0121] When such an Al-Mg-Si based alloy is used to manufacture, for example, the slide body of a first modification which has a shape similar to the shape of the slide body 10 of the first embodiment, a plate-like material with a predetermined thickness is produced for pressing by cold rolling or hot rolling of a round wire from an Al-Mg-Si based alloy.

[0122] Next, the resulting sheet-like material for pressing is heat-treated in an electric furnace at a temperature of 450°C or higher and 600°C or lower for a treatment time of 60 minutes or more and 300 minutes or less. Afterwards, the sheet-like material for pressing is made solutionized by rapid cooling with water or a similar liquid. It should be noted that, according to the present invention, the method and means for achieving solutionization are not specifically restricted, and the sheet-like material for pressing can be heated, for example, by using a heating device other than an electric furnace.

[0123] Furthermore, by repeatedly performing a pressing step on the plate-like material that has undergone heat treatment (treatment for solubility), wherein the pressing includes at least shearing and bending, the slide body (see Fig. 2 to Fig. 5), which has a shape similar to the shape in the first embodiment, shall be produced.

[0124] Subsequently, according to the first modification, a hardening treatment (aging hardening treatment) is performed on the resulting slide body at a temperature of 100°C or higher and 250°C or lower for a treatment time of 30 minutes or higher and 24 hours or lower. This hardening treatment hardens the slide body and effectively increases its hardness (especially the hardness of the receiving area). After this hardening treatment, the slide body can be manufactured according to the first modification.

[0125] Then, as in the first embodiment, a pull tab and an elastic part are attached to the manufactured slide body of the first modification, and thus the slide is manufactured according to the first modification.

[0126] The slide manufactured according to the first modification, like the slide 1 of the first embodiment, has a slide body with an arrangement relationship where "central length A < (maximum length B - central length A)" applies, an arrangement relationship where "0.60 ≤ (maximum length B - central length A) / maximum length B ≤ 0.75" applies, an arrangement relationship where "0.2 × maximum length B ≤ receiving area extension C ≤ 0.6 × maximum length B" applies, and an arrangement relationship where "maximum width extension W1 ≥ maximum length extension B" applies, these relationships referring to the reference cross-section.

[0127] As a result of performing a hardening treatment as described above in the manufacturing process of the slide body of the first modification with the arrangement relationships described above, the hardness and strength of the receiving area (guide column) of the slide body can be effectively increased, and the guide column of the slide body can thus have an average Vickers hardness of 100 Hv or higher. Consequently, if a strength test similar to that of the first embodiment is performed (see Fig. 6) the slide body according to the first modification has a strength such that a change (amount of change) in the opening height of the rear opening is less than 1 mm (preferably less than or equal to 0.8 mm).

[0128] Accordingly, like the slide 1 of the first embodiment, the slide with a slide body according to the first modification can perform the function of a slide appropriately for a long time. Furthermore, it is possible to achieve a weight reduction of the slide body and a cost reduction of the slide.

[0129] Furthermore, according to the present invention, a slide body of a second modification, having a shape similar to that of the slide body 70 of the second embodiment, can be manufactured using the Al-Mg-Si-based alloy described above in the same manner as in the first modification. A slide having this slide body according to the second modification can also achieve essentially similar effects to those of the slide 2 of the second embodiment. [Examples]

[0130] The present invention is described in more detail below by means of Example 1 to Example 6 and Comparative Example 1 to Comparative Example 3.

[0131] As examples 1 to 6 and comparative examples 1 to 3, slide bodies were manufactured using aluminum alloys having the composition specified in Table 1 below. For example, in each of examples 1 to 6, the slide body 10 was made with the alloy specified in Fig. 2 to Fig. 5 form shown, produced using the manufacturing process of the first embodiment or the first modification.

[0132] Meanwhile, in each of Comparative Examples 1 to 3, the receiving area (guide column) provided on the slide body was formed in a shape that satisfies the arrangement relationship where "the central length A < (the maximum length B - the central length A)" and / or the arrangement relationship where 0.60 ≤ (the maximum length B - the central length A) / the maximum length B ≤ 0.75", and the slide body in each of Comparative Examples 1 to 3 is essentially similar to the slide body 10 in the first embodiment, except that the shape of the receiving area does not satisfy the arrangement relationship described above.

[0133] Furthermore, in each of Comparative Examples 1 and 2, the slide body was manufactured using a method that is essentially similar to the manufacturing method described for the first embodiment. The slide body in Comparative Example 3 was manufactured by performing a pressing step on a plate-like material for pressing, which was made from a round wire of an aluminum alloy, without performing the annealing step described for the first embodiment.

[0134] For each of the slide bodies 10 produced for Example 1 to Example 6 and each of the slide bodies produced for Comparative Example 1 to Comparative Example 3, the appearance of each slide body was visually inspected, and the presence or absence of form defects, such as cracks, was determined. Additionally, the average Vickers hardness and the opening volume of the guide pillar in each slide body were measured using the method described for the first embodiment. The measurement results for the Vickers hardness measured in each slide body are shown in Table 1 below, and the measurement results for the Vickers hardness and opening volume are shown in Table 2 below. [Table 1] Alloy. Mg(w%) Mn (wt%) Si(wt%) Cu(w%) Cr (wt%) Vickers hardness (Hv) Example 1 Al-Mg based 4.78 0.06 0,12 0.02 0,06 107 Example 2 Al-Mg based 5.2 0.02 0.07 0,15 0 111 Example 3 Al-Mg based 5.5 0.24 0.07 0.03 0.03 115 Example 4 Al-Mg based 4.78 0.06 0.12 0.02 0.06 107 Example 5 Al-Mg-Si-based 1.08 0.03 0.76 0.34 0.12 105 Example 6 Al-Mg-Si-based 1.08 0.03 0.76 0.34 0.12 105 Comparative example 1 Al-Mg based 2.36 0.04 0.08 0.08 0.17 96 Comparative example 2 Al-Mg based 2.36 0.04 0.08 0.08 0.17 91 Comparative example 3 Al-Mg based 4.78 0.06 0.12 0.02 0.06 immeasurable [Table 2] Alloy Vickers hardness (Hv) Opening size (mm) Overall ranking Example 1 Al-Mg based 107 0.38 ◯ Example 2 Al-Mg based 111 0.33 ◯ Example 3 Al-Mg based 115 0.34 ◯ Example 4 Al-Mg based 107 0.15 ⊚ Example 5 Al-Mg-Si based 105 0.14 ⊚ Example 6 Al-Mg-Si based 105 0.06 ⊚ Comparative example 1 Al-Mg based 96 1.94 × Comparative example 2 Al-Mg based 91 2.48 × Comparative example 3 Al-Mg based not measurable not measurable ×

[0135] As a result, upon visual inspection of the appearance of each of the slide bodies 10 manufactured for Examples 1 to 6, no form defects, such as cracks, were observed, and each of the slide bodies 10 had an adequate quality of appearance. Additionally, it was confirmed that the average Vickers hardness of the guide pillar 12 in each of the slide bodies 10 in Examples 1 to 6 was greater than or equal to 100 Hv, and it was confirmed that in a stress test where the opening strength was measured, each of the slide bodies 10 exhibited a strength at which the change in the opening height of the rear opening 16 was less than or equal to 0.8 mm (specifically, less than or equal to 0.4 mm). In a comparison between Example 1 and Example 4, the opening height in Example 4 was smaller than in Example 1, while the Vickers hardness was the same for both Example 1 and Example 4.This is understood as an effect of the precedence relationship where “0.60 ≤ (the maximum length B - the midpoint length A) / the maximum length B ≤ 0.75”.

[0136] Accordingly, in each of examples 1 to 6, it is possible to ensure that the slider 1 with the slider body 10 does not easily deform and become unusable, even if the sliding action of the slider 1 is repeated in a zipper where the slider 1 is used. Therefore, the function of the slider 1 can be performed continuously for a long time.

[0137] Meanwhile, it was confirmed that for each of the slider bodies produced for Comparison Example 1 and Comparison Example 2, the average Vickers hardness of the guide column was less than 100 Hv. Additionally, it was also confirmed that in a stress test measuring opening strength, the rate of change in the opening height of the rear opening was greater than 1 mm. Accordingly, it was found that in a slider with the slider body from either Comparison Example 1 or Comparison Example 2, used in a zipper, the slider body deforms slightly.

[0138] As a result of a visual inspection of the appearance of the valve body, it was confirmed that the valve body produced for comparison example 3 had a quality defect in which a large number of cracks were created in the valve body (especially on the guide column). Reference symbol list 1, 2 sliders 10 slide bodies 11 Lower shield plate 12 Leadership pillar 13 Upper flange area 14 Lower flange area 15 Shoulder opening 16 Rear opening 17 Coupling link guide passage 20 Top plate 21 First leadership pillar 22 Basic area 23 First leadership pillar 24 insertion holes 25 jack holes 30 recording area 31 Concave inlet area 32 First interior wall area 33 step range 33a First stage area 33b Second stage area 33c Third stage 34 Second interior wall area 35 Gutter floor area 35a Concave Enclosure Area 35b Central threshold area 35c Lower threshold 35d Curved Area 39 Recording area section 40 Elastic part (leaf spring part) 41 Base area section 41a First opening area 41b Contact area 41c Second opening area 41d Third opening area 42 Coupling section 42a Neck area 42b Head area 43 Stopper claw section 50 pull tabs 51 Pull tab section 51a Through hole 52 Arm section 53 shaft section 54 Pull tab opening area 60 Testing device 61 Slider mounting area 62 Pull tab holding area 70 slide bodies 71 Lower shield plate 72 Guide pillar 73 Upper flange area 74 Lower flange area 76 Rear opening 80 Top plate 81 First column section 82 Second column section 85 jack holes 90 recording area 91 Concave inlet area 92 First interior wall area 93 step range 94 Second interior wall area 95 Gutter bottom area 99 Recording area section 100 Elastic part 101 Pull tab holding area 101a Opening area 102 Base area section 103 Coupling section 104 Stopper claw section 110 pull tab 111 Pull tab section 111a Through hole 112 arm section 113 Shaft section 114 Pull tab opening area A Central longitudinal extent B Maximum linear expansion C Recording area extent L1 Total length of the slide body L2 Holding distance of the pull tab W1 Maximum value (maximum width extent) in left-right direction in the middle of the dome rib W2 Opening width (width extent of the opening) of the rear opening QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] WO 2012 / 032657

[0002] JP 2004-250760

[0005] JP 2006-291298

[0005]

Claims

Slider, which is a slider (1, 2) for a zipper, wherein the slider comprises: a slider body (10, 70) in which an upper shield plate (20, 80) and a lower shield plate (11, 71) are coupled to each other via a guide column (12, 72); an elastic part (40, 100) which is attached to the slider body (10, 70); and a pull tab (50, 110) comprising a shaft section (53, 113) which is held between the slide body (10, 70) and the elastic part (40, 100), characterized in that the slide body (10, 70) is made of an aluminum alloy whose composition is represented by a general formula: AlaMgbMncCrd (a, b, c and d are given in wt.%, a is a remainder, 3.9 ≤ b ≤ 6.5, 0 < c ≤ 0.4, 0 < d ≤ 0.3, which may contain an unavoidable impurity) or by a general formula: AleMgfSigCuhCri (e, f, g, h and i are given in wt.%)-%, e is a residue, 0.8 ≤ f ≤ 2.0, 0.4 ≤ g ≤ 0.9, 0.15 ≤ h ≤ 0.8, 0 < i ≤ 0.45, where an unavoidable impurity may be present), wherein a receiving area (30, 90) for the part is provided at least on the guide column (12, 72) of the slide body (10, 70), wherein the receiving area (30, 90) comprises a concave insertion groove area (31, 91) into which a section of the elastic part (40, 100) is inserted, and wherein the average Vickers hardness of the guide column (12, 72) is greater than or equal to 100 Hv. Slide according to claim 1, characterized in that the slide body (10, 70) has a pair of a left and a right shoulder opening (15) arranged at a front end section of the slide body (10, 70) where the guide column (12, 72) is attached, and a rear opening (16, 76) arranged at a rear end section of the slide body (10, 70), wherein the pair of a left and a right shoulder opening (15) is arranged such that the guide column (12, 72) is located between the pair of left and right shoulder openings (15), and wherein, when a tension test is performed in which the pull tab (50, 110) is pulled with a load of 120 N in an up / down direction orthogonal to the upper shield plate (20, 80) and the lower shield plate (11, 71) to separate from the lower shield plate (11, 71) to separate, is carried out in a state in which the slide body (10, 70) is supported, the slide body (10,70) has a strength such that the difference between the expansion of the rear opening (16, 76) in the up / down direction before the stress test is carried out and the expansion of the rear opening (16, 76) in the up / down direction after the load is removed is less than 1 mm. Slide according to claim 1 or 2, characterized in that, when a cross-section of the partial receiving area (30, 90) is considered orthogonal to the top / bottom direction at a position midway between the upper shield plate (20, 80) and the lower shield plate (11, 71) with respect to the top / bottom direction, and when an extension of the receiving area (30, 90) with respect to the longitudinal direction of the slide at a central position with respect to the width direction of the slide is designated as the central longitudinal extension A, and an extension of the receiving area (30, 90) from a position at a front edge to a position at a rear edge with respect to the longitudinal direction of the slide is designated as a maximum longitudinal extension B of the receiving area (30, 90), the partial receiving area (30, 90) has an arrangement relationship in which the central Linear extent A < (the maximum linear extent B - the mean linear extent A)". Slide according to claim 3, characterized in that the partial receiving area has an arrangement relationship in which “0.60 ≤ (the maximum length extension B - the central length extension A) / the maximum length extension B ≤ 0.75”. Slide according to one of claims 1 to 4, characterized in that, if a maximum value of an extent of the partial receiving area (30, 90) with respect to a width direction of the slide at a position in the middle between the upper shield plate (20, 80) and the lower shield plate (11, 71) with respect to an up / down direction is designated as maximum width extent W1, and an extent of the rear opening (16, 76) of the slide body (10, 70) with respect to a width direction of the slide is designated as opening width W2, the slide body (10, 70) has an arrangement relationship in which "the maximum width extent W1 < the opening width W2".

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