JPH02131702A - Injection molding boots having gas permeability - Google Patents

Abstract

PURPOSE:To obtain the injection molding boots having gas permeability which is inexpensive and comfortable to wear by inclining ribs in the heel direction, providing a vent groove communicating with vent grooves provided between the ribs, inserting a hard inner sheet with many vent holes into the upper face of the ribs, and forming vertical vent grooves which communicates with the sole vent grooves at the sole part and directed to the wearing port direction on the inside surface of a drum part. CONSTITUTION:Ribs 21, 21... directed in the short direction are provided as one body with the boots sole 2 through lining cloth 1 on the bottom face in the boots, the ribs 21, 21... are inclined in the sole direction, and also, its center part is notched, a vent groove 23 communicating with vent grooves 22, 22... formed between the ribs 21, 21... is provided, moreover, a hard inner sheet 3 provided with many vent holes 31, 31... are inserted into the upper face of the ribs 21, 21..., and also, on the inside surface of a drum part 4, vent grooves 41, 41... which communicates with the vent grooves 22, 22... at the sole part and directed in the wearing port direction are formed.

Description

[Detailed description of the invention] (Industrial application field) This invention relates to breathable injection molded boots.

(Prior Art) Conventionally, in Utility Model Publication No. 10483/1983, the applicant provided a large number of ribs on the lower surface of the insole that were inclined toward the toe, and created ventilation grooves formed between the ribs in the toe and heel portions. We have proposed an insole that communicates with a provided ventilation hole and is inserted into a shoe for use.

Shoes with such insole inserts have excellent breathability, but the cost is high as the insole mold must be carved and prepared for each size. When used with boots that have a torso, laces, and toes with plenty of room, the movement of the foot inside the shoe causes the ventilation grooves formed between the ribs to become bending grooves or bending grooves. As a result, the insole bends inside the shoe, making it less comfortable to wear. Further, in the case of boots, since the torso is long, the hem of the pants or the like comes into close contact with the inner surface of the torso, which impedes ventilation within the shoe, resulting in a significant decrease in breathability.

(Problems to be Solved by the Invention) The present invention aims to provide injection molded boots that are inexpensive, comfortable to wear, and breathable. (Means for solving problems, embodiments) Explained below with reference to actual drawings,
In this invention, ribs 21, 21, . In the one provided, the ribs 21, 21... are inclined toward the heel, and the center part thereof is notched to form a ventilation groove 23 that communicates with the ventilation grooves 22, 22... formed between the ribs 21, 21...
Further, a hard insole 3 having a large number of ventilation holes 31.31 is inserted into the upper surface of the ribs 21.21, and the inner surface of the heel portion of the torso 4 communicates with the ventilation grooves 22.22. The gist of the invention is to provide breathable injection molded boots characterized by forming ventilation grooves 41, 41, . . . oriented toward the shoe opening. In this invention, the lining fabric 1 means a sock-like lining fabric. In this invention, the ribs 21, 21... are integrally molded with the sole 2 of an elastic material that can be used for injection molding of boots, such as soft vinyl chloride, EVA, 1.2 polybutadiene, styrene-butadiene block copolymer, or polyurethane. It is something that

These ribs 21.21... have ribs 21.21 on the bottom surface.
If the lining fabric 1 is hung by a conventional method on the last with grooves formed in accordance with the shape of 21..., and the sole 2 integrated with the upper part 4 is injection molded by a conventional method, the structure of the lining fabric 1 will be changed. A portion of the sole molding material is filled into the groove through a gap or a hole made in the lining cloth 1 as necessary, and a rib 2 is integrated with the sole 2.
1.21... is easily molded. It is preferable that the inclination angle α of the ribs 21, 21... with respect to the heel direction is set to 30° to 606°.

If the inclination angle is less than that, the repulsion action after bending of the ribs 21,21... will be reduced, and its pumping action will be reduced, and if the inclination angle is greater than that, the flexibility of the ribs 21,21... will be reduced. As a result, the ventilation effect of the shoelaces tends to decrease due to the decrease in the pollutant effect. In this invention, the breathable insole 3 has ventilation holes 31.31.
It is composed of hard boards such as synthetic resin boards, fiberboards, leather boards, cork, etc., and if necessary, these hard boards 301 are used as substrates, and a soft foam layer 302 is laminated on the top surface. , cushioning properties may be provided.

In this invention, the ventilation grooves 41.41... are the ribs 21.2.
1... may be integrally molded with protrusions 42, 42... through the lining fabric 1, and formed between the protrusions 42, 42..., or linear depressions 411, 411... may be formed on the inner surface of the trunk. It may be configured by forming. This ventilation groove 41
．． 41... are provided at appropriate locations on the inner surface of the heel portion of the body portion 4, but if they are formed on the inner surface of the side portion 401 of the heel portion of the body portion, excluding the area where the ankle of the foot comes into contact, the shoes can be easily worn. When using the bag, the grooves 41, 41, etc. do not interfere with foot contact, making it convenient.

These ventilation grooves 41, 41... are the projections 4 that constitute the ventilation grooves.
2.42... or corresponding to the depression 411.411...
By forming grooves or protrusions on the side of the last, the body 4 can be easily molded during injection molding.

(Operations and Effects of the Invention) Since the present invention is constructed as described above, when walking or running while wearing the shoes, as the weight pressure is transferred from the heel of the foot toward the toes, The ribs 21.21... are sequentially bent in the heel direction from the heel part to the toe part through the hard insole 3, and due to the pumping action, the ribs 21.21...
The air in the ventilation grooves 22, 22, which are formed between them, is transmitted through the ventilation grooves 23 that communicate with these, and is strongly pushed out toward the heel inside the boots through the ventilation holes 31, 31, which are formed in the insole 3. and a ventilation groove 41 formed on the inner surface of the heel portion of the body portion 4.
41..., and is forcibly pushed out toward the opening of the boots.

Therefore, ventilation inside the boots is not obstructed by the hem of the pants, etc., and breathability is good.

Furthermore, since the insole 3 is made of a hard plate and is separate from the ribs 21, 21, . . . , it does not fold up inside the shoe and is comfortable to wear. Furthermore, the ribs 21.2l are molded integrally with the sole 2 through the lining fabric 1 during injection molding of the sole, making molding easy and inexpensive. In addition, when the completed shoe is attached to the last after sole injection molding and is removed from the last from the heel direction, the ribs 21, 21... are slanted toward the heel, making it extremely easy to mold the shoe. be.

It's easy.

[Brief explanation of the drawing]

The drawings show an embodiment, and FIG. 1 is a partially cutaway sketch thereof, FIG. 2 is a sectional view taken along line A-A in FIG. 1, and FIG. 3 is a cross-sectional view taken along line A-A in FIG. FIG. 1. Lining cloth 22. Ventilation groove 31...Vent hole 302...Soft foam layer 401...Torso heel side part 411...Description of recess second opening code 2. Sole 21. Rib 23. Ventilation groove 3. Insole 301...hard board {. Body 4l...Groove 42...Protrusion 1 mouth #(qJji)

Claims (1)

[Claims] In a shoe in which ribs 21, 21... oriented in the transverse direction are provided integrally with the sole 2 through the lining fabric 1 on the bottom surface of the shoe, the ribs 21, 21... are inclined toward the heel, and the central portion thereof is A ventilation groove 23 is provided by cutting out the ribs 21, 21, and communicates with the ventilation grooves 22, 22 formed between the ribs 21, 21.
A hard insole 3 having... is inserted, and ventilation grooves 41, 41... are formed on the inner surface of the heel portion of the torso 4, communicating with the ventilation grooves 22, 22..., and oriented toward the shoe opening. Breathable injection molded boots.