JP4344047B2 - Safety shoes and rain boots - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to safety shoes and rain shoes used for foot protection in various industrial workplaces.
[0002]
[Prior art]
In general, workers wearing safety shoes have a heavy labor, and the shoes are likely to be stuffy due to sweating of the feet when worn for a long time. In particular, although the toe of the foot has good sweating properties, the tip of the safety shoe has a toe made of a hard material to protect the wearer's toe. In addition, the safety shoes are unsanitary and more uncomfortable because the inside of the shoes is easily stuffy and generates a bad odor.
In order to improve the breathability, it is conceivable to provide a vent in the upper of the safety shoe, but there is an inconvenience that rainwater, dust and earth and sand enter the shoe from the vent, so far, No good safety shoes are known.
[0003]
In addition to the safety shoes described above, leather shoes, synthetic leather shoes, and athletic shoes that are exclusively used for walking in town are known to have a ventilation structure. For example, according to JP-A-7-327706, JP-A-8-56704, JP-A-10-57103, JP-A-10-248604, etc. A breathable shoe having a structure in which pores are covered with a liquid water-impermeable and water-vapor permeable membrane material is known. However, since the air containing steam and hot air in the shoes tends to stay above the inside of the shoes, these shoes having no vent holes on the back side of the shoes have a problem in terms of air permeability. Yes. Further, since the membrane material is disposed on the sole, it is directly subjected to the load of the wearer and is easily damaged.
[0004]
Japanese Patent Application Laid-Open No. 7-303503 discloses a shoe in which a tape having air permeability is provided on the side surface of the front bottom. However, the tape is exposed to the outside and is easily damaged or damaged.
Further, according to Japanese Patent Laid-Open No. 10-179202, shoes having vent holes on the side surfaces are also known, but even if vent holes are provided near the ankle just because they do not come into contact with water or dust, The improvement of the ventilation effect cannot be expected.
[0005]
Rain shoes are usually made of synthetic resin or rubber with the entire upper skin such as upper leather, and a water-impermeable skin is formed. However, although the device for ventilation or ventilation of the toe portion having a large sweating action is based on the pump means (JP-A-7-194408, JP-A-8-84603), the structure of the pump means is complicated. There are difficulties in long-term reliability, and currently no rain shoes that satisfy the ventilation performance are known.
[0006]
[Problems to be solved by the invention]
As described above, the tiptoe part of the tip of the safety shoe is most likely to be steamed, but there are no safety shoes that take into consideration the breathability of the upper toe part due to the restriction due to the tip being attached. . An object of the present invention is to provide safety shoes and rain shoes excellent in breathability and waterproof measures in rainy weather.
[0007]
[Means for Solving the Problems]
In the safety shoe according to the present invention, a water channel having an end portion as a drainage hole is formed inside the tip of the tip to open to the outer surface of the tip, and a plurality of air inlets that penetrate the tip and reach the channel are provided. The air holes are formed at intervals, and a vent hole that communicates the water channel with the inside of the shoe is provided so that the water channel side opening of the vent hole does not face the air guide port.
The opening on the water channel side is preferably covered with a liquid water impermeable and water vapor permeable membrane.
It is preferable to provide an opening / closing means that can prevent rainwater from entering by closing the air inlet and the drain hole.
Preferably, the water channel is formed in the foot width direction, and both ends of the water channel are opened as drain holes on the outer surface side of the tip.
[0008]
The rain boots according to the present invention form a water channel that opens to the outer surface side of the upper with an end portion as a drainage hole inside the upper, and spaces a plurality of air inlets that penetrate the upper and reach the water channel And a vent hole communicating the water channel with the inside of the shoe is provided so that the water channel side opening of the vent hole does not face the air guide port.
The opening on the water channel side is preferably covered with a liquid water impermeable and water vapor permeable membrane.
It is preferable to provide an opening / closing means that can prevent rainwater from entering by closing the air inlet and the drain hole.
Preferably, the water channel is formed in the foot width direction, and both end portions of the water channel are opened as drainage holes on the outer surface side of the upper.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the best mode of safety shoes according to the present invention will be described with reference to the drawings.
FIG. 2 is a side view showing the toe portion of the safety shoe in a longitudinal direction. The outer shape is an upper 10 which is the upper side of the shoe, a waist leather (not shown) which is the side, and an outsole which is the sole. 20.
An insole 22 made of a thin plate material and having substantially the same shape as the foot shape is laid on the upper surface of the bottom surface 20 and plays a role of protecting the inner foot.
[0010]
A tip 30 is attached to the toe of the safety shoe in order to maintain its impact resistance and pressure resistance. The tip 30 can be made of a material such as metal or synthetic resin, fiber reinforced plastic, ceramic, and the like, and a cloth tip / back 24 is attached to the inside of the tip 30.
[0011]
FIG. 1 is a perspective view of the tip 30 viewed obliquely from the front, and a plurality of air guide holes 32 are formed at intervals in the foot width direction. In the present embodiment, the two air guide hole groups 32, 32,... Are formed, but the number of the air guide hole groups 32, 32,. The plurality of air introduction holes 32 are not necessarily provided in the foot width direction, and may be in the foot length direction or any other direction.
[0012]
FIG. 3 is a partial side view taken along the line III-III in FIG. In FIG. 3 (1), a water channel 34 extending in the foot width direction is formed inside the tip 30 sandwiched between the upper 10 and the front and back 24, and the aforementioned air guide holes 32 are formed at the top of the water channel 34. It has been drilled.
Although there is no restriction | limiting in particular about the magnitude | size of the air guide hole 32, It is preferable to set it as about 2-6 mm. Although there is no special restriction | limiting also in the number of the air guide holes 32, about several to about 20 is preferable about 1 line | wire. The shape of the air introduction hole 32 is not limited to the circular shape as illustrated, and may be an ellipse or a polygon.
In the upper 10, an opening 12 having the same size as the air guide hole 32 is provided at a position overlapping the air guide hole 32.
[0013]
The water channel 34 is formed in the inside along the curved shape of the tip 30, and in the case of the foot width direction as in this embodiment, both ends of the water channel 34 open to the outer surface side as drain holes 36, 36. Yes. The size of the drain hole 36 is substantially the same as that of the air guide hole 32.
The cross-sectional shape of the water channel 34 is arbitrary, and can be a square, a U-shape, a circle, or the like. The depth or diameter of the water channel 34 is preferably about 2 to 8 mm. The position in the thickness direction of the tip 30 where the water channel 34 is formed is not particularly limited as long as the strength of the tip 30 is not lowered.
[0014]
A vent hole 38 that penetrates the tip 30 is formed in the bottom wall of the water channel 34, and the water channel 34 communicates with the inside of the safety shoe through the vent hole 38. There is a possibility that a plurality of ventilation holes 38 may enter from the air introduction holes 32 by making a plurality of vent holes 38 so that the positions in the extending direction of the water channel 34 (the foot width direction in this embodiment) do not coincide with the positions of the air introduction holes 32. It can be avoided that the granular material or the needle-shaped material damages the film described below.
[0015]
In the present embodiment, a liquid water impermeable and water vapor permeable film 40 is adhered to the bottom wall of the water channel 34, and as a result, the water channel side opening 38 a of the vent hole 38 is sealed with the film 40. .
The liquid water impervious and water vapor permeable membrane 40 has a property of allowing gas such as water vapor and air to permeate, but not allowing solid fine particles and liquid such as water and aqueous solution to permeate. And porous membranes such as tetrafluoroethylene resin and urethane resin. These porous membranes have pores with a diameter of about 0.1 μm to 3.0 μm. When the pore diameter is less than 0.1 μm, the air permeability is lost, and when it exceeds 3.0 μm, the waterproof property is lost. Specific examples of the ultra-high molecular weight polyethylene resin include Microtex and SUNMAP (both are trademarks) manufactured by Nitto Denko Corporation, and Tyvek (trademark) manufactured by DuPont USA as a high-density polyethylene fiber. Further, as the tetrafluoroethylene resin, Gore-Tex (trademark) manufactured by Japan Gore-Tex is suitable.
[0016]
In the above embodiment, the inside of the safety shoe communicates with the outside through the vent hole 38, the water channel 34, the air guide hole 32, and the opening 12, and the membrane 40 is gas permeable. . Accordingly, moisture, odor and heat generated inside the safety shoe are released to the outside of the safety shoe, and fresh air is taken into the safety shoe from the outside. During rainy weather, rainwater or the like enters the water channel 34 through the opening 12 and the air guide holes 32, but flows down along the slope in the width direction of the water channel 34 and is discharged to the outside through the drain hole 36. At this time, since the vent hole 38 of the water channel 34 is sealed by the membrane 40, water does not enter the safety shoe from the vent hole 38. In this way, the water channel 34 functions as a drainage channel for rainwater and an air flow passage.
Particulate matter such as earth and sand that has entered from the air introduction holes 32 is also blocked by the film 40 and therefore does not enter the safety shoes. Further, even if needles such as these granular materials and nails enter from the air introduction holes 32, the positions of the air introduction holes 32 and the vent holes 38 are deviated from each other, so that direct contact of these entry objects is prevented. As a result, the membrane 40 in the vent hole 38 is not damaged.
[0017]
FIG. 3B shows a modification regarding the structure of the tip 30. In this figure, the same members as those in FIG. 3A are denoted by the same reference numerals as those in FIG. In addition, the upper 10 and the front and back 24 are not shown in the figure. In this figure, the point which provided the straight ventilation hole 38b and the curved ventilation hole 38c in the side wall of the water channel 34 is different from embodiment of FIG. 3 (1).
[0018]
In the embodiment shown in FIG. 3 (3), the tip 30 is composed of two members, that is, an upper layer 30 a having the air inlet 32 and a lower layer 30 b having the water channel 34 and the vent hole 38. This makes hole processing easy. Further, by using two members, a material suitable for the tip core 30 can be selected in terms of strength. The vent hole 38 is bent at a right angle and communicates the side wall of the water channel 34 and the inside of the shoe.
[0019]
The safety shoes of the present invention may include opening / closing means (not shown) that can close the air inlet 32 and the drain hole 36 through which the water channel 34 communicates with the outside. When the opening / closing means is closed, it becomes a safety shoe that completely blocks the intrusion of rainwater. On the other hand, when the opening / closing means is opened, it becomes a safety shoe with high breathability. In particular, in the case of safety shoes used exclusively for indoor work, the above-described liquid water-impermeable and water-vapor-permeable membrane 40 is not adhered to the water channel 34, thereby making the safety shoes more excellent in breathability. it can. Examples of the opening / closing means include an elongated plate material along the water channel 34, a stretchable sheet or bag that closes the air inlet 32 and the drain hole 36, and a stopper.
[0020]
Unlike safety shoes, rain shoes do not have a tip. The rain boot of the present invention is different from the safety shoes described above from the water channel 34, the air guide hole 32, the drain hole 36, the vent hole 38, and the liquid water impervious and water vapor permeable film 40 formed in the tip 30. The above structure differs only in that it is formed on the upper of a rain boot. And the effect acquired by the structure formed in the said upper is also equivalent to the case of safety shoes.
[0021]
【The invention's effect】
As a result of considering the breathability of the upper toe part of the safety shoes of the present invention, the steamed air staying in the vicinity of the upper is replaced with fresh fresh air, so the ventilation efficiency is excellent and the shoes do not stuffy . Further, since the arrangement of the air introduction holes and the air holes is devised, the liquid water impermeable and water vapor permeable film is not broken or damaged. In addition, although the upper is provided with a vent hole, rainwater and the like do not enter the inside of the shoe, and waterproofing measures in rainy weather etc. are perfect.
The rain shoes of the present invention can achieve the same effects as the safety shoes.
[Brief description of the drawings]
FIG. 1 is a perspective view of a tip of the present invention as viewed obliquely from the front.
FIG. 2 is a side view showing a toe portion of a safety shoe in a longitudinal section.
FIG. 3 is a partial side view of the tip core taken along the line III-III in FIG. 1;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Upper 30 Lead core 32 Air guide hole 34 Water channel 36 Drain hole 38 Vent hole 38a Water channel side opening 40 of a vent hole Liquid water impervious and water vapor permeable membrane

Claims (8)

A water channel is formed in the front core with an end portion as a drainage hole and opened to the outer surface of the front core, and a plurality of air inlets that penetrate the front core and reach the water channel are formed at intervals. A safety shoe comprising a vent hole communicating the water channel with the shoe interior so that the water channel side opening of the vent hole does not face the air guide port. The safety shoe according to claim 1, wherein the opening on the water channel side is covered with a liquid water impermeable and water vapor permeable membrane. The safety shoe according to claim 1, further comprising opening / closing means capable of preventing intrusion of rainwater by closing the air inlet and the drain hole. The safety shoe according to claim 1, wherein the water channel is formed in a foot width direction, and both end portions of the water channel are opened to the outer surface side of the tip as drainage holes. A water channel is formed inside the upper with an end as a drainage hole and opened to the outer surface of the upper, and a plurality of air inlets that penetrate through the upper and reach the water channel are formed at intervals. A rain boot comprising a vent hole communicating the water channel with the shoe interior so that a water channel side opening of the vent hole does not face the air guide port. 6. The rain boot according to claim 5, wherein the opening on the water channel side is covered with a liquid water impermeable and water vapor permeable film. The rain boots according to claim 5, further comprising an opening / closing means capable of preventing intrusion of rainwater by closing the air inlet and the drain hole. 8. The rain boots according to claim 5, wherein the water channel is formed in a foot width direction, and both end portions of the water channel are opened to the outer surface side of the upper as drainage holes.

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