JP2019005495A - Multi-layer leather member - Google Patents

Abstract

To obtain a multi-layer leather member that can prevent wear due to external friction of a thread line sewing a circumferential edge of the multi-layer leather member, without lowering strength of an outer-most layer of the surface side of the multi-layer leather member for forming leather products, and also without asking the nature of the leather for use in the surface side outer-most layer.SOLUTION: A multi-layer leather member 1 has an outer-most layer comprising the leather at sides of front and rear surfaces, and is formed in an integral laminate where a circumferential edge is sewn. A recessed groove 4 by pressing force is formed along a preset sewing-scheduled line L in a lower surface of a surface side outer-most layer 2 of the multi-layer leather member. A step-forming floor material 6 is provided at intervals of a length being equal to or more than a thickness of the step-forming floor material 6 from an inner edge of the recessed groove 4 along the recessed groove 4 at the inside from the recessed groove 4.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a multilayer leather member for molding leather products, which has outermost layers made of leather on the front and back sides, and has a peripheral edge sewn to form an integrated laminate.

  Conventionally, when manufacturing leather products such as wallets, card cases, key cases, bags, etc., it has an outermost layer made of leather on the front and back sides, and is used for forming leather products that are sewn at the periphery and formed into an integral laminate. A multilayer leather member is used. Multi-layered leather members are durable because they can be formed by stacking multiple leathers, and if necessary, by laminating intermediate layers, and because they have good shape retention, they form basic shapes such as the body of leather products. It is often used as a base material. For example, it is used as a main body of a wallet, or for forming a body part or a bottom part of a main body part that forms a bag housing part.

  In many cases, the multilayer leather member used as the base material of the leather product is the outer surface of the leather product. Therefore, if the thread stitching the multi-layer leather member appears as protruding from the surface of the outermost layer on the surface side, which is the outer surface of the leather product, it will receive friction due to contact with the outside when using the leather product. There is a risk that the leather product will be worn out.

  Therefore, conventionally, as a means for preventing such a situation, along the planned sewing line set on the surface of the multilayer leather member, the upper surface of the outermost layer on the surface side is cut to form a concave groove, and the thread is formed into the concave line. By forming the groove in the groove, the yarn is not rubbed when the leather product is used to prevent the yarn from being worn out (see, for example, Patent Document 1). Further, along the planned sewing line set on the surface of the multilayer leather member, the upper surface of the outermost layer on the surface side is pressed to form a concave groove, and a thread is formed in the concave groove, thereby producing a leather product. For example, Japanese Patent Application Laid-Open No. 2003-26083 has been made to prevent the yarn from being worn out by preventing the yarn from being subjected to friction during use.

JP 2010-59342 A Japanese Patent No. 120433

  The sewn part of the multilayer leather member is a part where the sewing holes are continuously formed, and is a part that receives pressure by sewing, so it is desirable that the strength is higher. However, since the multilayer leather member as described in Patent Document 1 performs the formation of the groove at the sewing line by cutting, the strength of the groove portion of the outermost layer on the surface side decreases, and aged As a result, the sewing hole is widened, and the groove portion is easily extended or deteriorated. In addition, there may be a case where breakage occurs such as a break between the sewing holes, and there is a problem that the service life may be shortened.

  Further, as described in Patent Document 2, in order to form a concave groove that does not protrude from the surface of the outermost layer by pressing, the leather to be used needs to have sufficient thickness and softness. Therefore, there is a problem that a concave groove having a sufficient depth cannot be formed, for example, when a high-density and strong leather is used for the outermost layer of the multilayer leather member.

  The object of the present invention is to reduce the strength of the outermost layer on the surface side of the multilayer leather member for molding the leather product, and the peripheral edge of the multilayer leather member regardless of the nature of the leather used for the outermost layer on the surface side. An object of the present invention is to provide a multilayer leather member that can prevent fraying due to external friction of stitches that are sewn.

  In order to achieve the above object, the invention according to claim 1 is a multilayer leather member having outermost layers made of leather on the front and back sides, and having a peripheral edge sewn to form an integrated laminate. The outermost layer on the surface side is formed with a depression groove by pressing along a predetermined sewing line on the lower surface thereof, and the lower surface of the outermost layer on the surface side is provided with the groove on the inner side of the groove. A step-formed floor material is provided along the inner edge of the concave groove with a distance equal to or greater than the thickness of the step-formed floor material.

  The invention according to claim 2 is characterized in that the outermost layer on the surface side according to claim 1 is formed with a scribe line along the outer edge of the step forming floor material on the lower surface thereof. .

  The invention according to claim 3 is characterized in that the step forming floor material according to claim 1 or 2 is formed in a band shape.

  The invention according to claim 4 is characterized in that the stepped floor material according to claim 3 is formed in a tapered shape in which the thickness of the inner edge is ½ or less of the thickness of the outer edge. And

  The invention according to claim 5 is characterized in that the step forming floor material according to claim 1 or 2 is formed in a sheet shape.

According to the multilayer leather member according to claim 1, since the outermost layer on the surface side is formed with the concave groove by pressing along a predetermined sewing line on the lower surface thereof, the multilayer leather member. Are sewn along the planned sewing line, the concave groove formed in the lower surface of the outermost layer on the front surface side is crushed by receiving the sewing pressure from the upper and lower sewing threads, and the outermost layer on the front surface side is crushed. The upper surface is depressed according to the crushing of the concave groove, and the thread appearing on the upper surface of the outermost layer on the surface side sinks in the thickness direction from the upper edge of the peripheral edge of the multilayer leather member.
Further, since the step forming floor material is provided along the concave groove inside the concave groove on the lower surface of the outermost layer on the surface side, when sewing the peripheral edge of the multilayer leather member, Bending the front side outermost layer from the outer edge of the step forming floor material along the outer end surface, and sewing the front side outermost layer and the back side outermost layer without bending the back side outermost layer, By the bent outermost layer on the surface side, a bulging step portion that bulges in the thickness direction along the inner side of the thread on the surface of the multilayer leather member is formed.
Thereby, a concave portion is formed between the bulging step portion and the upper edge of the peripheral edge of the multilayer leather member on the upper surface of the outermost layer on the surface side, and the thread is located in the deepest portion of the concave portion and is stored in the concave portion, It can be set as the state where a thread does not protrude from the surface of a multilayer leather member. It is possible to prevent a situation in which the thread that is stored in the recess and does not protrude from the surface of the multilayer leather member does not easily come into contact with the outside and is worn out by friction with the outside.
Further, the step forming floor material provided on the lower surface of the outermost layer on the surface side is provided with an interval of a length equal to or greater than the thickness of the step forming floor material from the inner edge of the concave groove. Therefore, without bending the outermost layer on the back surface side, the outermost layer on the front surface side is bent along the outer end surface from the outer edge of the step forming floor material to be formed on the lower surface of the outermost layer on the front surface side. The concave groove is brought into contact with the upper surface of the back-side outermost layer, and the front-side outermost layer and the back-side outermost layer can be sewn along the concave groove. Thereby, the bulging step part can be reliably formed on the surface of the multilayer leather member.
And, as described above, the formation of the concave portion for storing the yarn is not cut as in Patent Document 1, and the fraying of the yarn is prevented without reducing the strength of the outermost layer on the surface side. It is possible to prevent the service life from being shortened.

  According to the multilayer leather member according to claim 2, the surface-side outermost layer according to claim 1 has a ruled line formed on the lower surface thereof along the outer edge of the stepped portion forming floor material. Therefore, when the peripheral edge portion of the multilayer leather member is sewn, the outermost layer on the surface side can be easily and reliably bent from the outer edge of the stepped portion forming floor material by a scribe line. In addition, when the ruled lines are formed, the outermost layer on the surface side using the strong leather can be bent reliably, so that the sewing work of the peripheral portion of the multilayer leather member can be easily performed. it can.

  According to the multilayer leather member according to claim 3, since the step forming floor material according to claim 1 or 2 is formed in a band shape, the step forming is performed to form the bulging step. A flooring can be provided in a necessary width at a necessary location, and material can be saved.

  According to the multilayer leather member according to claim 4, the step forming floor material according to claim 3 is formed in a tapered shape in which the thickness of the inner edge is ½ or less of the thickness of the outer edge. Therefore, the step formed between the outermost layer on the front surface side and the outermost layer on the back surface side can be reduced inside the step forming floor material formed in a band shape, and the surface of the leather product is floated, It is possible to prevent the appearance of a step on the surface corresponding to the inner edge of the part-forming floor material, thereby preventing a situation in which the design of the leather product is impaired.

  According to the multilayer leather member according to claim 5, since the step forming floor material according to claim 1 or 2 is formed in a sheet shape, the step forming floor material is provided with the step forming floor material. Prevents a situation where a step occurs between the outermost layer on the front surface side and the outermost layer on the back surface side, prevents the surface of the leather product from floating or appears on the surface, and prevents the design property of the leather product from being impaired. be able to. Moreover, the multi-layer leather member is highly integrated, and a multi-layer leather member suitable for use in a bent portion can be obtained.

It is a surface side top view which shows the 1st example of embodiment of the multilayer leather member which concerns on this invention. It is an AA line expanded sectional view of FIG. It is a partially expanded plan view which shows the lower surface side of the surface side outermost layer before sewing except the back surface side outermost layer of the multilayer leather member shown in FIG. FIG. 4 is a sectional view taken along line BB in FIG. 3. FIG. 2 is an exploded explanatory view of the multilayer leather member shown in FIG. 1 before sewing. It is a partially expanded sectional view which shows the 2nd example of embodiment of the multilayer leather member which concerns on this invention. It is a partially expanded sectional view which shows the 3rd example of embodiment of the multilayer leather member which concerns on this invention. It is a partially expanded plan view which shows the lower surface side of the surface side outermost layer before sewing except the back surface side outermost layer of the multilayer leather member shown in FIG. It is CC sectional view taken on the line of FIG. It is a perspective view which shows an example of the leather product shape | molded using the multilayer leather member which concerns on this invention.

Hereinafter, a first example of an embodiment of a multilayer leather member according to the present invention will be described in detail with reference to FIGS.
FIG. 1 is a plan view of the front surface side showing a first example of the embodiment of the multilayer leather member of this example, FIG. 2 is an enlarged sectional view taken along line AA of FIG. 1, and FIG. 3 is the back surface of the multilayer leather member shown in FIG. FIG. 4 is a partially enlarged plan view showing the lower surface side of the outermost surface layer before sewing, excluding the outermost layer, FIG. 4 is a cross-sectional view taken along line BB of FIG. 3, and FIG. 5 is a sewing of the multilayer leather member shown in FIG. It is decomposition | disassembly explanatory drawing before wearing.

  The multilayer leather member 1 of the first example is a multilayer leather member for molding leather products, which has a front side outermost layer 2 and a rear side outermost layer 3 made of leather on the front and back sides and is integrally formed by sewing the peripheral edge. is there. The multilayer leather member 1 is a member that forms the basic shape of a leather product such as the main body of a wallet or the trunk or bottom of a bag, and the upper surface of the outermost layer 2 on the surface side is the outer surface of the leather product to be manufactured. The leather used for the outermost layer 2 on the front surface side and the outermost layer 3 on the back surface side is selected according to the leather product to be manufactured, and its properties are not particularly limited.

In the outermost surface 2 that appears on the outer surface side of the leather product, a depression by pressing along a planned sewing line (not shown), which is a line on which the multilayer leather member 1 is to be sewn, is formed on the lower surface. A groove 4 is formed (see FIGS. 3 and 4).
In the first example, the concave groove 4 is formed by first pressing a V-shaped trowel or the like along the planned sewing line against the lower surface of the outermost surface layer 2 to form a V-shaped groove. The V-shaped groove formed is expanded by pushing the tip with a U-shaped spatula or the like. The formation method by the press of the concave groove 4 is not restricted to this, The formation method by another press may be used.

  The depth of the concave groove 4 is such that the thread 5 appearing on the upper surface of the outermost surface layer 2 when the peripheral portions of the laminated outermost layer 2 and the outermost layer 3 are sewn, as described later. There is no particular limitation as long as it has a depth that allows the thread 5 to be accommodated in the recess formed by the bulging step portion swelled in the thickness direction from the peripheral edge upper edge 1a and the peripheral edge upper edge 1a of the multilayer leather member 1. The depth of the upper part of the thread 5 is preferably the same as or less than that of the upper edge 1a of the multilayer leather member 1.

  In addition, on the lower surface of the outermost layer 2 on the front surface side, a strip-shaped step forming floor material 6 is formed along the concave groove 4 on the inner side of the concave groove 4, and is equal to the thickness of the step forming floor material 6 from the inner edge of the concave groove 4. Alternatively, they are provided with an interval longer than that (see FIGS. 3 and 4).

As the material for the stepped portion forming flooring 6, a material that can maintain a thickness equal to or greater than a certain thickness even when pressure from sewing is applied from above and below, for example, leather, urethane, or the like is used.
Here, the fixed thickness is the height of the bulging step portion formed on the surface of the multilayer leather member 1 when the peripheral portions of the front surface side outermost layer 2 and the back surface side outermost layer 3 are sewn as described later. The thread 5 is accommodated in a recess formed between the top of the bulging step and the upper edge of the peripheral edge of the multilayer leather member 1 so that the thread 5 does not protrude from the surface of the multilayer leather member 1. This means the thickness of the step forming floor material 6 that can be formed.
Moreover, the width | variety of the strip | belt-shaped step part formation flooring 6 will not be specifically limited if it is a width | variety which can form the bulging step part mentioned later reliably. However, the step forming floor material 6 of the first example is formed in a tapered shape whose thickness decreases from the outer edge to the inner edge, and the step is formed on the surface of the multilayer leather member 1 corresponding to the position of the inner edge of the step forming floor material 6. In order not to occur, it is preferable that the tapered surface 6a has such a width that the inclination is so gentle that it can be reasonably brought into contact with the upper surface of the rear surface side outermost layer 3.

  Further, the surface-side outermost layer 2 has ruled lines 9 formed on the lower surface thereof along the outer edge of the stepped portion forming flooring 6. The ruled line 9 is formed by bending the outermost surface layer 2 from the outer edge 6b to the outer edge 6c of the step forming floor material 6 when sewing the peripheral edge of the multilayer leather member 1 described later. It is formed for the sake of simplicity, and is shallow enough not to affect the decrease in strength of the surface side outermost layer 2 (see FIGS. 3 and 4).

  The outermost layer 2 on the front surface side of the multilayer leather member 1 configured as described above is laminated on the upper surface of the outermost layer 3 on the rear surface side, and is sewn to the outermost layer 3 on the back surface side along the planned sewing line at the periphery. In sewing, a sewing hole is formed in advance along a planned sewing line using a diamond pattern or the like. Then, the front surface side outermost layer 2 and the back surface side outermost layer 3 are sewn through the formed sewing holes through the thread, and the multilayer leather member 1 is integrated. At this time, the peripheral edge portion of the outermost layer 2 on the front surface side is bent along the outer end surface 6c from the outer end edge 6b of the step forming floor material 6 to perform sewing (see FIG. 2). At this time, it is necessary that the back surface side outermost layer 3 does not bend along the step forming floor material 6.

  When sewing is performed in this manner, the concave groove 4 formed along the planned sewing line on the lower surface of the outermost layer 2 on the front surface side is crushed by receiving the sewing pressure from the vertical direction by the sewing thread, and the outermost surface side outermost layer 2 is crushed. The upper surface of the outer layer 2 is depressed according to the crushing of the concave grooves 4, and the thread appearing on the upper surface of the outermost layer on the surface side sinks in the thickness direction from the upper edge of the peripheral edge of the multilayer leather member.

  Further, the front surface side outermost layer 2 is bent along the outer end surface 6c from the outer edge 6b of the stepped portion forming flooring 6, and the front surface side outermost layer 2 and the rear surface side outermost layer 3 are not bent. Is formed on the surface of the multilayer leather member 1 along the inside of the thread 5 so as to bulge beyond the thread 5 in the thickness direction.

  In this way, the upper surface of the outermost layer 2 on the surface side is depressed and the bulging step portion 7 is formed, so that the upper surface of the outermost layer 2 on the surface side has the upper edge of the peripheral edge of the bulging step portion 7 and the multilayer leather member 1. A recess 8 is formed between 1a and 1a. The thread 5 is located at the deepest part of the recess 8 and is accommodated in the recess 8 so that the thread 5 does not protrude from the surface of the multilayer leather member 1.

  According to the multilayer leather member 1 of the first example configured as described above, the thread 5 is accommodated in the recess 8 and the thread 5 does not protrude from the surface of the multilayer leather member 1. It is possible to prevent a situation in which they are not easily brought into contact with the outside and are worn out by friction with the outside.

  Further, on the lower surface of the outermost layer 2 on the front surface side, the step forming floor material 6 is equal to or equal to the thickness of the step forming floor material 6 from the inner edge of the groove 4 along the groove 4 inside the groove 4. Since the distance of the above length is provided, the width from the position in contact with the outer edge 6b of the step forming flooring 6 of the surface side outermost layer 2 to the planned sewing line is the stepped portion. The outer end surface 6c is equal to or longer than the width of the outer end surface 6c of the formed floor material, and the outermost surface layer 2 is moved from the outer edge 6b of the step forming floor material 6 to the outer end surface without bending the outermost layer 3 on the back surface side. It can be bent along 6c and sewn.

  And since the scribe line 9 is formed along the outer edge of the step forming floor material 6, it becomes easy to bend the surface side outermost layer 2 along the step forming floor material 6.

  Furthermore, since the step forming floor material 6 is formed in a band shape, the material can be saved.

  Further, since the step portion forming floor material 6 is formed in a tapered shape whose thickness is attenuated from the outer edge to the inner edge, the step portion forming floor material 6 is generated between the front surface side outermost layer and the back surface side outermost layer inside the step portion forming floor material. The level difference can be reduced, and it is possible to prevent the design from being lost due to floating or level differences appearing on the surface of the leather product.

FIG. 6 is a partially enlarged sectional view showing a second example of the embodiment of the multilayer leather member according to the present invention.
About the multilayer leather member of 2nd example, about the structure same as 1st example, the same code | symbol is attached | subjected, the description is abbreviate | omitted, and only a structure different from 1st Example is demonstrated.

In the second example, the multilayer leather member 1 includes an intermediate layer 10 that is a core material between the outermost layer 2 on the front surface side and the outermost layer 3 on the rear surface side.
Moreover, the strip | belt-shaped step part formation flooring 6 formed in the taper shape is provided in the lower surface of the surface side outermost layer 2 of this example similarly to the 1st example.
The intermediate layer 10 has a tapered surface 10a corresponding to the tapered surface 6a of the stepped floor material 6 at the peripheral edge thereof, and is laminated so that the tapered surface 10a overlaps the tapered surface 6a.
Since the other configuration is the same as the first example, the first example is used and the description thereof is omitted.

According to the multilayer leather member 1 of this example configured as described above, it is possible to reliably prevent a step from being generated between the outermost layer 2 on the front surface side and the outermost layer 3 on the back surface side on the inner edge side of the step forming floor material 6. It is possible to prevent a situation in which a float or a step appears on the surface of the leather product and the design properties are impaired. Moreover, the core material according to a leather product can be laminated | stacked, and the multilayer leather member 1 corresponding to various leather products can be obtained.
Since the other effects are the same as those of the first example, the first example is used and the description thereof is omitted.

7 to 9 show a third example of the embodiment of the multilayer leather member according to the present invention, FIG. 7 is a partially enlarged sectional view of this example, and FIG. 8 shows the multilayer leather member shown in FIG. FIG. 9 is a cross-sectional view taken along the line CC of FIG. 8, showing a partially enlarged plan view showing the lower surface side of the front surface side outermost layer before sewing, excluding the back surface side outermost layer.
About the multilayer leather member of the 3rd example, the same numerals are attached about the same composition as the 1st example, the explanation is omitted, and only the composition different from the 1st example is explained.

In the third example, in the multilayer leather member 1, a sheet-like step forming floor material 11 is laminated between the front surface side outermost layer 2 and the back surface side outermost layer 3.
The step forming floor material 11 is equal to or more than the thickness of the step forming floor material 11 from the inner edge of the groove 4 so that the periphery of the step forming floor material 11 is along the inner edge of the groove 4 on the lower surface of the outermost surface layer 2. It is laminated at a position where the length is spaced around the periphery.
Since the other configuration is the same as the first example, the first example is used and the description thereof is omitted.

According to the multilayer leather member 1 of this example configured as described above, the step-forming floor material 11 is in the form of a sheet, so that a floating or step appears on the surface of the multilayer leather member 1 and the design property is impaired. Can be prevented. Moreover, since the step part formation flooring 11 becomes a core material of the multilayer leather member 1, the multilayer leather member 1 in which the core materials are easily laminated can be obtained.
Since the other effects are the same as those of the first example, the first example is used and the description thereof is omitted.

  From here, the form of use of the multilayer leather member according to the present invention will be described by taking as an example a wallet molded using the multilayer leather member according to the present invention. FIG. 10 is a perspective view showing a wallet as an example of a leather product formed using the multilayer leather member according to the present invention.

The wallet 12 is a long wallet molded using the multilayer leather member 1 according to the present invention as a base material forming the main body. The wallet 12 has an outer surface on the front surface side of the multilayer leather member 1 and an inner surface on which a housing portion such as a pocket is provided on the back surface side. As shown in FIG. 10, the wallet 12 has a peripheral edge attached to form a thread 5. The thread 5 includes a bulging step 7 formed so as to bulge beyond the thread 5 in the thickness direction along the inside of the thread 5 on the surface of the wallet 12, and the upper edge of the peripheral edge of the multilayer leather member 1. It is formed in the deepest part of the recessed part 8 formed between the peripheral edge of the surface of the wallet 12 which is 1a. As a result, when the wallet 12 is taken in and out of the pocket or bag, it is possible to prevent a situation in which the thread 5 and the outside do not easily come into contact with each other and are worn by friction.
In addition, since a structure that reduces the strength of the leather is not required to prevent fraying of the thread 5, the sewn portion of the wallet 12 can be used for a long time without stretching or tearing. Can do.

DESCRIPTION OF SYMBOLS 1 Multilayer leather member 1a Peripheral edge upper edge 2 Front surface side outermost layer 3 Back surface side outermost layer 4 Concave groove 5 Thread line 6 Step part formation flooring 6a Tapered surface 6b Outer edge 6c Outer end surface 7 Swelling step part 8 Concave part 9 Line 10 Middle layer 10a Tapered surface 11 Step forming floor material 12 Wallet

Claims (5)

  A multilayer leather member having an outermost layer made of leather on the front and back sides and having a peripheral layer sewn to form an integrated laminate, the outermost layer on the front side being sewn in advance on its lower surface A groove is formed by pressing along a predetermined line, and a step forming floor material is formed on the lower surface of the outermost surface side outer layer along the groove from the inner edge of the groove. A multilayer leather member, wherein the multilayer leather member is provided at an interval equal to or greater than the thickness of the step forming floor material.   2. The multilayer leather member according to claim 1, wherein a ruled line is formed on the lower surface of the surface side outermost layer along an outer edge of the step forming floor material.   The multilayer leather member according to claim 1 or 2, wherein the step forming floor material is formed in a band shape.   4. The multilayer leather member according to claim 3, wherein the stepped floor material is formed in a tapered shape in which the thickness of the inner edge is ½ or less of the thickness of the outer edge. The multilayer leather member according to claim 1 or 2, wherein the step forming floor material is formed in a sheet shape.

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