JP2004268385A - Reinforcing structure for vamp backer body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide the reinforcing structure for a vamp backer body mounted on the toe part of a safety shoe or a work shoe in order to protect the toe of a wearer from pressure or an impact. <P>SOLUTION: In the vamp backer body for constituting a reinforcing vamp backer built in the toe part of the safety shoe, the vamp backer body has a rib provided to the inner surface thereof and a plurality of projections are provided to the whole or a part of the rear end part of the vamp backer body. Further, if necessary, flash formed at the time of molding is left on the whole or a part of the rear end part of the vamp backer body. A toe cap supporter is fixed by thermal welding using the rib, the projections and a protruded part to constitute the reinforcing vamp backer of the safety shoe. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a reinforcing structure of a forehead main body constituting a reinforcing forehead to be attached to a toe part of safety shoes or work shoes in order to protect a toe of a wearer from pressure and impact.
[0002]
[Prior art]
Conventionally, it is required by JIS to insert a reinforcing tip in order to protect the toe of a wearer in the toe of the safety shoe. FIG. 1 shows a partially cutaway cross-sectional view thereof (Patent Document 1).
[0003]
[Patent Document 1] Japanese Patent No. 2821515 (FIG. 1 on page 1-3)
[0004]
In FIG. 6, the reinforcing core includes a core body 11a and a step prevention tape (hereinafter referred to as a toe cap supporter) 16, and the core body 11a is provided inside the toe of the sole 12a. An upper 13 is attached to the front core body 11a and the sole 12a. An insole 14 and an insole 15 are laminated on the upper surface of the sole 12a, and a toe cap supporter 16 is adhered to the inner surface of the core body 11a with an adhesive. . FIG. 7 shows the configuration of the leading core body 11a and the detailed relationship between the leading core body 11a and the toe cap supporter 16.
[0005]
In FIG. 7, the front core body 11a is made of a fiber reinforced resin material using carbon fiber, glass fiber, or the like as a reinforcing material, and is formed by, for example, injection molding, and the front core body 11a protects the wearer's toes. And a curved lower part 22 which is bent inward from the lower side of the arch part 21 and is buried between the shoe sole 12a and the midsole 15. The arch portion 21 has a top wall 21a, both side walls 21c, 21c, and a rear end surface 21d. A plurality of ridge portions 23 provided along the width direction are provided on the inner surface of the arch portion 21 to provide pressure resistance and pressure resistance. Improves impact strength.
In the case of this conventional example, since the leading core body 11a is formed by injection molding of a hard plastic by a mold or the like, burrs are generated at the rear end of the molded leading core body 11a. The burrs are removed, and the toe body 11a is attached to the toe of the safety shoe. When the toe body with the burr removed is attached to the toe of the safety shoe, the back end of the toe body and the upper of the upper are removed. When a step is formed between the upper and lower parts, the upper is often dented and impaired in appearance, or the foot contact due to the trailing edge of the leading core is often deteriorated. Therefore, in order to eliminate the step that occurs between the rear end of the front core body of the safety shoes and the upper and to eliminate the contact with the foot, usually, an elastic body such as rubber or soft synthetic resin is used at the rear end of the front core body. The toe cap supporter 16 is attached by bonding with an adhesive or an adhesive tape.
[0006]
[Problems to be solved by the invention]
However, the above-described conventional reinforcing core has the following problems.
When molding the core body using a resin material, burrs are generated at the rear end portion of the core. However, there are troublesome operations such as an operation of removing the burrs and an operation of bonding the core body and the toe cap supporter with an adhesive. . In particular, the deburring operation and the bonding operation not only increase the cost, but also have various problems such as disposal of the burr generated by the deburring operation and deterioration of the working environment due to the use of the adhesive. Further, when the toe cap supporter and the toe core main body are peeled off due to the deterioration of the adhesive, the toe cap supporter and the toe core main body play, and the feet are rubbed with shoes.
In addition to the above-mentioned conventional example, there is a leading core body in which a ridge (rib) is provided on the inner surface of the leading core body to achieve pressure resistance and impact resistance (for example, Patent Document 2). The backing material eliminates the step due to the front core body, so that a sufficient effect of eliminating the step cannot be obtained.
[0007]
[Patent Document 2] Japanese Utility Model Laid-Open No. 5-82302 (Page 1-2, FIG. 1 and 2)
[0008]
Therefore, in the present invention, in the front core body, the front core body is provided with a rib on the inner surface and a plurality of protrusions formed on the whole or a part of the rear end to protect the toe of the wearer from compression and impact. It is an object of the present invention to provide a reinforcing structure of a leading core body that can perform the following. For this reason, the tip core body and the toe cap supporter can be integrated by fusion using the ribs and projections provided on the tip core. In addition, by providing reinforcing ribs in the horizontal or vertical direction inside the core body, it is possible to give sufficient strength to the core body and reduce the weight without increasing the thickness and shape of the core body. In addition, the toe cap supporter can be firmly fixed by heat fusion using the reinforcing ribs on the inner surface of the front core body, so that it is excellent in pressure resistance and impact resistance, and reduces cost It is possible to constitute a reinforcing core of a safety shoe that can achieve the following.
[0009]
[Means for Solving the Problems]
For this reason, the technical solution adopted by the present invention is:
In a forehead body constituting a reinforcing forecore built into a toe portion of a safety shoe, the forebody body has a rib on an inner surface and a plurality of protrusions on the whole or a part of a rear end. It is a reinforcing structure of the leading core body which is a feature.
Further, there is provided a reinforcing structure for a front core body, characterized in that the entire rear end portion or a part of the front core body has burrs generated during molding.
Further, the tip core body is a reinforcing structure of the tip core body, wherein the tip core body is made of a hard synthetic resin or a metal.
Further, the rib formed on the inner surface of the leading core body is a reinforcing structure for the leading core body, wherein the rib is formed in a horizontal direction or a vertical direction of the inner surface.
Further, there is provided a reinforcing structure for a front core body, wherein the reinforcing ribs provided in the longitudinal direction are gradually reduced in thickness toward a toe portion.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described in detail with reference to FIGS.
FIG. 1 is an external view of a first embodiment of a front core body 1 of a safety shoe front core manufactured by molding.
[0011]
The leading core body 1 is made of a fiber reinforced resin material using carbon fiber, glass fiber, aramid fiber or the like as a reinforcing material, and is formed by, for example, injection molding. The forehead body 1 has a curved arch portion 2 for protecting a wearer's toes, and a lower edge which is bent inward from a lower side of the arch portion 2 and buried between a shoe sole and an insole. A bent portion 3 is provided.
[0012]
The arch portion 2 has a top wall 4, both side walls 5, 5 and a rear end face 6, and a plurality of projections 7 are formed on the rear end face 6, and the width, length, and interval of the projections 7 are formed. Can be changed as appropriate. Also, depending on the accuracy of the mold, burrs 8 may be formed on the rear end surface 6 of the leading core body during molding, and the burrs 8 can be used for fusion with the toe cap supporter.
Ribs 9 are provided on the inner wall of the leading core body 1 in the lateral direction (the left-right direction of the shoe) to reinforce the leading core body 1, and a portion of the rib 9 extends from an appropriate position of the rib 9 in a vertical direction. It has a protruding shape. The number of ribs 9 and the number of ribs in the vertical direction can be set as appropriate.
[0013]
FIG. 2 is an external view of the second embodiment of the forehead body 1, in which the thickness of the vertical ribs 9 formed on the inner wall of the forehead body 1 is from the rear end of the forehead body 1 to the toe of the foot. A rib 9a which is formed so as to decrease gradually within a range in which foot contact does not occur, and which has an appropriate length in the front-rear direction so as to intersect with the rib 9 formed in the lateral direction (the lateral direction of the shoe) as necessary. This is an example in which is formed. It is desirable that the height of the rib 9a be reduced toward the front.
[0014]
FIG. 3 is an external view of a third embodiment of the leading core body 1, in which, for example, a plurality of (two in this example) ribs formed on the inner wall of the leading core body 1 in the lateral direction (lateral direction of the shoe). This is a working example.
Further, these ribs 9 can be formed in a plurality of rows and in an arc shape, a square shape, a combination thereof, or the like as necessary according to the product shape.
FIG. 4 is an external view of the toe cap supporter 10 fixed to the leading core body 1. The toe cap supporter 10 made of a soft synthetic resin material has a top wall 11 similar to the shape of the rear end face 6 of the leading core body 1. And an arched shape composed of the side walls 12 and 12.
[0015]
The connection between the leading core body 1 and the toe cap supporter 10 is performed as follows.
The toe cap supporter 10 is inserted into the inner surface of the top wall 4 of the forehead main body 1, and the ribs 9, the protrusions 7, and the jagged burrs 8 formed on the forebody main body 1 are placed on the upper surface of the toe cap supporter 10 Then, heat is applied to that location to bring both members into a molten state. As a result, the toe cap supporter 10 made of a soft synthetic resin material enters between the plurality of projections 7 and between the jagged burrs 8, and the inner surfaces of the top core body 1 and the top wall of the toe cap supporter 10 are also in a molten state. The tip core body 1 and the toe cap supporter 10 are firmly fixed to the space between the ribs 9 to form a reinforcing tip for safety shoes.
[0016]
FIG. 5 is a cross-sectional view showing a state in which the leading core body 1 and the toe cap supporter 10 are combined. When the toe cap supporter 10 is fused using the burrs 8 on the rear end surface 6 of the leading core body 1. At the same time, the projections 7 are fused together, and both are in a firmly fixed state.
In the embodiment, the leading core body 1 is a fiber reinforced resin material using carbon fiber, glass fiber, aramid fiber or the like as a reinforcing material, and the toe cap supporter 10 is a soft synthetic resin material. The metal and the toe cap supporter 10 may be made of rubber or a foamed plastic material.
[0017]
Further, in the above-described embodiment, an example in which the leading core body and the toe cap supporter are connected to each other using the projections provided on the entire rear end surface and the jagged burrs 8 (when molded) has been described. In the case where there is not, it is also possible to fuse with the toe cap supporter by using the projection on the rear end surface. Further, it is also possible to fuse with the toe cap supporter by using burrs formed positively without forming protrusions. In this case, the mold is such that a projection and a burr are formed on a part of the rear end face.
Thereby, the leading core body and the toe cap supporter can be firmly joined, and the strength of the leading core body can be increased.
[0018]
As described above, according to the present invention, the toe cap supporter can be heated without using an adhesive without removing the burr generated on the front core body of the safety shoe front core manufactured by die molding. Can be fused and fixed.
By using the reinforcing structure of the front core body configured as described above, it is possible to provide safe and comfortable safety shoes.
[0019]
【The invention's effect】
As described above, since one or two ribs and a plurality of ribs are provided on the inner wall of the leading core body in the width direction and the vertical direction, the weight of the entire leading core body can be reduced without increasing the thickness and shape. Therefore, the compression resistance and the impact resistance can be improved, and the material can be saved and the cost can be reduced. By using a plurality of protrusions formed at the rear end of the front core body, the toe cap supporter can be firmly fixed to the front core body. Also, if necessary, the toe cap supporter can be fixed by using burrs generated when the tip core body is molded, so that troublesome deburring work can be omitted, and the working time can be significantly reduced. The cost can be realized. In addition, conventionally, since the toe cap supporter and the toe cap main body are fixed using an adhesive, when the adhesive is deteriorated, play occurs between the toe cap body and the toe cap main body, and in addition to inferior comfort, Although this was also a cause of shoe rubbing, the present invention does not have the above-mentioned concern because it is heat-sealed without using an adhesive. A comfortable shoe can be manufactured by designing a plurality of projections formed at the rear end of the front core body while appropriately considering the weight, balance and the like at the time of design. Further, since the weight can be reduced, the balance of the center of gravity when the shoes are mounted can be improved. Further, the rib formed at the rear end portion of the front core body has a cross-shaped shape, so that it is possible to prevent misalignment of the fused toe cap supporter. And other excellent effects.
[Brief description of the drawings]
FIG. 1 is an external view of a first embodiment of a leading core body of the present invention.
FIG. 2 is an external view of a second embodiment of a leading core body of the present invention.
FIG. 3 is an external view of a third embodiment of a leading core body of the present invention.
FIG. 4 is an external view of a toe cap fixed to a leading core body.
FIG. 5 is a cross-sectional view showing a state in which the leading core body and the toe cap supporter are connected in the present invention.
FIG. 6 is a partially cutaway sectional view of a conventional safety shoe having a front core.
FIG. 7 is a cross-sectional view of a front core provided in a conventional safety shoe.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Lead core body 2 Arch part 3 Lower side bent part 4 Top wall 5 Side wall 6 Rear end face 7 Projection 8 Burr 9 Rib 10 Toe cap supporter

Claims (5)

In a forehead body constituting a reinforcing forecore incorporated in a toe portion of a safety shoe, the forebody body has a rib on an inner surface and a plurality of protrusions on the whole or a part of a rear end. Characteristic reinforcement structure of tip core body. The reinforcing structure for a front core body according to claim 1, wherein the whole or a part of the rear end portion of the front core body has burrs generated during mold molding. The reinforcing structure for a leading core body according to claim 1 or 2, wherein the leading core body is made of a hard synthetic resin or a metal. The rib structure formed on the inner surface of the leading core body is formed in a horizontal direction or a vertical direction of the inner surface, and the reinforcing structure for the leading core body according to any one of claims 1 to 3. The reinforcing structure for a front core body according to claim 4, wherein the reinforcing ribs provided in the longitudinal direction are gradually reduced in thickness toward a toe portion.

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