JP6987369B2 - Sole sheet - Google Patents

Description

The present invention relates to a sole sheet, and more particularly to a sole sheet used by being attached to the sole of a worker who performs waterproofing work or the like.

A waterproof function is imparted by forming an impermeable coating film on a wide area that requires waterproofing, such as the roof or roof of a building. As one of such coating film waterproofing methods, there is a waterproofing work using a paint (urethane paint) containing a urethane resin. Urethane coating is widely used because it is relatively inexpensive, has good workability and finish, and can be applied to a wide range of applications.

In urethane coating, usually, the undercoat material is first applied to the part (base material) where waterproofing is required, and then the topcoat paint is applied on the undercoat material. Further, in order to secure a sufficient film thickness and to improve the finish, the topcoat paint is applied in a plurality of times. At this time, it takes a long time (for example, about half a day to several days) until the previously formed coating film is sufficiently dried and the surface is not sticky. For this reason, if the next coating is performed after waiting until the coating film is no longer sticky, the construction period will be long.

On the other hand, in order to shorten the construction period, it is conceivable to perform the next coating with the coating film sticky. However, when forming a coating film on a wide area such as a roof, the operator needs to perform the next coating while walking on the coated surface. Therefore, if the coating film is sticky, it may be difficult to walk on the coated surface or the finish of the coating may be affected.

In order to avoid the above-mentioned inconveniences, workers have conventionally applied a polyethylene adhesive tape to the back of their shoes or a sealant made of silicone (silicone sealant). , The coating work is done while devising measures such as giving mold releasability to the soles of shoes. Further, as a sheet member to be attached to the back of the shoes of a worker who performs urethane coating, a first layer containing acrylic acid ester resin as a main component, and acrylic acid ester resin and silicone resin as main components are used on a cloth. A releasable sheet member in which a second layer containing the resin is laminated has been proposed (see, for example, Patent Document 1).

Japanese Patent No. 5913964

However, if a method of attaching a polyethylene adhesive tape to the sole of the shoe is used to impart releasability to the sole of the shoe, a deteriorated substance of the adhesive tape (for example, an adhesive of the tape) adheres to the coating film. It is easy to do, and there is a concern that the quality of the finished coating will deteriorate. In addition, with the method of applying silicone sealant to the back of shoes, it takes a long time (about 3 days) for the applied sealant to dry, and the oil contained in the sealant seeps out, which affects the finish of the coating. There is concern that it will reach.

When the releasability is imparted by forming a resin film on the cloth as in the sheet member described in Patent Document 1, there is a concern that the anti-slip performance is not sufficient.

The present invention has been made in view of the above problems, and the main object of the present invention is to provide a shoe sole sheet that has high releasability with respect to the floor surface and is not slippery to the user.

In order to solve the above problems, the present invention has adopted the following means.

The first configuration is a sole sheet to be attached to the sole of a shoe, which is a laminated body including an adhesive layer and a rubber layer formed of silicone rubber. The rubber layer has the adhesive layer. It has a ground contact surface that comes into contact with the floor surface when attached to the sole of the shoe, and a large number of protrusions formed of silicone rubber and projecting in the thickness direction of the laminated body are formed on the ground contact surface. It is characterized by being done.

The ground contact surface of the sole sheet having the above configuration is formed of silicone rubber, and a large number of protrusions protruding in the thickness direction of the sole sheet are formed on the ground contact surface. With such a configuration, a shoe sole sheet having high releasability and non-slip can be obtained. Therefore, by attaching the sole sheet to the sole of the shoe so that the rubber layer is on the outside, the user can walk on the sticky coating film and the safety of the user is improved. Can be secured. Further, since the mold release property is high, even if the user walks on the coated surface, the influence on the coating film is small, and the finish of the film can be well maintained.

Further, since a large number of protrusions formed of silicone rubber are grounded to the floor surface, good grip can be exhibited not only on the coated surface but also on the floor surface of various materials. As a result, the user does not have to change shoes or remove the sole sheet from the sole of the shoe during work depending on where he / she walks.

The second configuration is characterized in that, in the first configuration, an intermediate layer having a cushioning property is provided between the adhesive layer and the rubber layer. Depending on the shape of the sole (degree of unevenness) and the skill of the user to attach the sole sheet, when attaching the sole sheet to the sole of the shoe, attach the sole sheet well so that it adheres to the sole. It may not be possible to attach it. In this case, there is a concern that the finish of the coating may be affected by the sole sheet attached to the sole of the shoe being easily peeled off from the sole of the shoe or the flat surface of the sheet being wavy. In this respect, by interposing a layer having a cushioning property between the rubber layer and the adhesive layer, flexibility can be imparted to the laminated body having the rubber layer, and the laminated body can be easily deformed in the thickness direction. In addition, the sole sheet can be made to follow the shape of the sole of the shoe and can be easily attached so as to be in close contact with the sole of the shoe.

In the third configuration, in the first or second configuration, a resin film is further provided, and the rubber layer is formed on one surface of the resin film, which is opposite to the rubber layer with the resin film interposed therebetween. The adhesive layer is arranged on the side.

When a shoe sole sheet is used, when a force is applied in the surface direction of the sheet, the rubber layer is easily deformed by extending in the surface direction due to rubber elasticity. Further, silicone rubber tends to have lower tear resistance than, for example, isoprene rubber or natural rubber. In consideration of these points, by further providing the resin film as in the third configuration, it is possible to suppress the elongation of the rubber layer and improve the tear resistance. As a result, the strength and durability of the sole sheet can be increased, and the product life can be extended. In addition, deterioration of the sole sheet can be suppressed, and the influence of deterioration of the sole sheet on the finish of coating can be reduced.

In the fourth configuration, in any of the first to third configurations, the outer shape of the laminated body corresponds to the outer shape of the sole of the shoe when viewed from the thickness direction of the laminated body, and the laminated body has the outer shape. The size of the shoe is larger than that of the sole of the shoe, and at least the toe portion of the outer edge of the laminate has a notch extending from the outer periphery to the inside and opening to the outer peripheral side. ..

In the above configuration, when the sole sheet is attached to the sole of the shoe so that the sole sheet protrudes from the tip of the shoe, a notch extending inward from the outer circumference is formed in the protruding portion. For this reason, when the protruding portion of the toe portion of the sole sheet is bent along the peripheral surface of the shoe, the sole sheet is firmly attached to the peripheral surface of the shoe so that the sole sheet covers the tip portion of the shoe. be able to. In addition, by attaching the sole sheet to the toe part of the shoe, for example, even when the user crouches so as to put his / her weight on the toe during work, the sole sheet covering the toe part of the shoe can be used. It is possible to prevent the toe portion of the user's shoes from coming into direct contact with the coated surface. As a result, it is possible to prevent problems from occurring on the coated surface and deterioration of workability of the user.

The perspective view which shows the state of the shoe which the sole sheet of 1st Embodiment is attached to the sole of a shoe. The plan view of the sole sheet of 1st Embodiment. The portion surrounded by the alternate long and short dash line is a partially enlarged view of the rubber layer. FIG. 2 is a sectional view taken along the line AA of FIG. The plan view of the sole sheet of the 2nd Embodiment. The perspective view which shows the state of the shoe which the sole sheet of 2nd Embodiment is attached to the sole.

<First Embodiment>
Hereinafter, the sole sheet of the first embodiment will be described with reference to the drawings. In FIG. 3, for convenience of explanation, the thickness dimension is shown larger than the actual thickness dimension.

As shown in FIGS. 1 and 2, the sole sheet 10 is a sheet-like member used by being attached to the sole of the shoe 30 (hereinafter referred to as “sole 31”). The sole sheet 10 is particularly attached to the sole 31 of the shoe 30 (for example, work shoes, athletic shoes, safety shoes, etc.) of a worker who performs waterproofing work on the roof, rooftop, veranda, balcony, etc. of a building. Used. In the following description, of the shoe sole sheet 10, the surface (attachment surface 11) side to be attached to the shoe sole 31 is the "back side", and the sole sheet 10 is attached to the ground in a state of being attached to the shoe sole 31. The side to be contacted (ground plane 12) is referred to as the "front side".

As shown in FIG. 2, the shoe sole sheet 10 has an outer shape corresponding to the shape of the shoe sole 31. The size of the sole sheet 10 is one size larger than the average shoe size of an adult man (for example, a shoe size of 27 cm). Specifically, the length L is 34 cm cm and the width W is. It is 14 centimeters. The thickness D of the sole sheet 10 is, for example, about 1.2 mm.

As shown in FIG. 3, the sole sheet 10 is a laminated body composed of a plurality of layers. The sole sheet 10 has a resin film 13 as a core material, a rubber layer 14 provided on the front surface of the resin film 13, an intermediate layer 15 provided on the back side of the resin film 13, and a sticking surface 11. An adhesive layer 16 is provided, and these plurality of layers are integrated.

The resin film 13 is made of a hard resin material, specifically polyethylene terephthalate (PET). The resin film 13 has a shape corresponding to the shape of the shoe sole 31. The thickness of the resin film 13 is, for example, about 0.1 mm. The resin film 13 may be formed of a resin material other than polyethylene terephthalate, and may be formed of, for example, polyethylene (PE), polypropylene (PP), or the like.

The rubber layer 14 is formed on one surface of the resin film 13 in the form of a sheet over the entire surface. The rubber layer 14 is formed of a room temperature curable type or heat curable type silicone rubber, and exhibits rubber elasticity at room temperature. The rubber layer 14 is formed by using a rubber composition containing polysiloxane (for example, dimethylpolysiloxane having a high degree of polymerization) and silica, and curing the rubber at room temperature or heating. The rubber layer 14 is formed to have substantially the same outer shape as the outer shape of the resin film 13. The thickness of the rubber layer 14 is larger than the thickness of the resin film 13 and is about 0.5 mm. In addition, in order to improve the adhesion between the resin film 13 and the rubber layer 14, a pressure-sensitive adhesive layer such as a silicone-based pressure-sensitive adhesive or an acrylic-based pressure-sensitive adhesive is further provided between the resin film 13 and the rubber layer 14. You may.

As shown in FIG. 3, the rubber layer 14 constitutes the outermost layer portion of the sole sheet 10. The surface 14a of the rubber layer 14 is a ground contact surface 12 in contact with the floor surface when the shoe sole sheet 10 is attached to the shoe sole 31 (see FIG. 1). A large number of protrusions 17 projecting in the thickness direction of the sole sheet 10 are formed on the surface 14a (see FIG. 3). These protrusions 17 are made of silicone rubber and are integrated with the main body portion of the rubber layer 14. Specifically, the rubber layer 14 is embossed on the surface of the layer as shown in the portion surrounded by the alternate long and short dash line in FIG. As a result, the rubber layer 14 is a silicone rubber sheet on which a large number of convex portions 17a are formed.

The shape of the embossing formed on the rubber layer 14 (that is, the shape of the convex portion 17a) is circular or elliptical. A large number of these convex portions 17a are formed at predetermined intervals over the entire surface 14a. The size of the convex portion 17a is about 1 mm in diameter and about 0.1 to 0.2 mm in height. The shape of the embossing is not limited to a circle or an ellipse, and may be, for example, a triangle or a quadrangle. Further, it may be a pattern or a linear convex portion.

The intermediate layer 15 is a cushion layer formed by using a foam material, and is formed over the entire back surface of the resin film 13. Here, the intermediate layer 15 is formed of foamed polyethylene. The intermediate layer 15 constitutes the inner layer portion of the sole sheet 10 by covering the entire surface portion thereof with the resin film 13 and the rubber layer 14. The thickness of the intermediate layer 15 is larger than the thickness of the resin film 13 and is about 0.5 mm. The intermediate layer 15 is deformed following the deformation of the rubber layer 14.

The intermediate layer 15 may be formed of a foaming material other than foamed polyethylene, and may be formed of, for example, foamed polyurethane, foamed polypropylene, EVA (ethylene vinyl acetate) foam, or the like.

The intermediate layer 15 is adhered to the surface of the resin film 13 opposite to the surface on which the rubber layer 14 is formed, with the adhesive layer 18 interposed therebetween. The adhesive layer 18 is formed by applying a synthetic resin adhesive such as a silicone adhesive.

The adhesive layer 16 is formed on the surface (back surface) of the intermediate layer 15 opposite to the surface on which the rubber layer 14 is formed, over the entire back surface thereof. The adhesive layer 16 is formed by applying an adhesive to the back surface of the intermediate layer 15. Here, the adhesive layer 16 is formed by an acrylic adhesive. The back surface of the adhesive layer 16 is a sticking surface 11 for sticking the sole sheet 10 to the shoe sole 31. A release paper 19 is provided on the sticking surface 11.

Next, a method of attaching the sole sheet 10 to the shoe sole 31 and an operation when the sole sheet 10 is attached to the shoe sole 31 will be described.

In places where waterproofing is required, such as roofs, rooftops, balconies, balconies, etc. of buildings, waterproofing functions are given by forming an impermeable coating film on those places. ing. Waterproofing work using urethane paint is relatively inexpensive, has good workability and finish of coating, and can be applied to a wide range of applications, so it imparts waterproofness to a large area of floor surface. It is widely used as a construction method for.

Before using the sole sheet 10, the release paper 19 is still attached to the sticking surface 11. The worker who performs the waterproofing work first peels off the release paper 19 from the sticking surface 11 and sticks the sticking surface 11 and the shoe sole 31 together. At this time, the operator attaches the sole sheet 10 to the sole 31 so that the entire surface of the sole 31 is covered with the sole sheet 10 (see FIG. 1). Then, if necessary, the portion of the sole sheet 10 protruding from the sole 31 is cut with scissors or the like. Note that FIG. 1 shows a state in which the protruding portion of the shoe sole sheet 10 is cut to a slightly larger size along the outer shape of the shoe sole 31. In this way, the entire surface of the sole 31 is covered with the sole sheet 10 with the silicone rubber sheet having a large number of protrusions 17a on the surface facing outward.

Here, in urethane coating, usually, an undercoat material (also referred to as a primer, a filler, etc.) is first applied to the substrate for the purpose of strengthening the adhesiveness and rust preventive property of the coating film and adjusting the unevenness of the substrate. It is applied and then a topcoat paint is applied on top of it. In addition, the topcoat paint may be applied in multiple times. At this time, in order to shorten the working time, the operator forms the next coating film on the coating film having the stickiness before the stickiness (tack) on the surface of the previously formed coating film disappears. There is. In this case, when forming a coating film on a wide area such as a roof or a rooftop, the operator will apply the coating film while walking on the sticky coating film. Even in such a case, it is necessary for the operator to be able to walk smoothly and safely on the sticky coating film, and to prevent the finish of the coating film from being affected.

On the other hand, the worker who performs the waterproofing work attaches the sole sheet 10 to his own shoe sole 31, and performs the coating work with the attached state, so that the coating film formed earlier is still sticky. Even in the presence of, the operator can easily and safely walk on the sticky surface while maintaining the good finish of the previously formed coating film. Further, since the ground contact surface 12 of the sole sheet 10 is provided with a large number of convex portions 17a formed of silicone rubber, it slides not only on the urethane-coated portion but also on other floor surfaces. Hateful. Therefore, even if the worker tries to move from the coated place to another place, the worker does not slip easily and the safety of the worker can be ensured. Further, in order to prevent slipping, the worker does not have to bother to change shoes or peel off the sole sheet 10 every time he / she moves from the coated place to another place.

According to the present embodiment described in detail above, the following excellent effects can be obtained.

The ground contact surface of the sole sheet 10 was formed of silicone rubber, and a large number of convex portions 17a protruding in the thickness direction were formed on the ground contact surface. As a result, the shoe sole sheet 10 can be made into a shoe sole sheet 10 that has high mold releasability on the coated surface coated for waterproofing work and is not slippery by the operator.

Further, since it is configured to be grounded to the floor surface by a large number of convex portions 17a formed of silicone rubber, good grip can be exhibited not only on the coated surface but also on the floor surface of various materials. Therefore, the user does not have to bother to change shoes or remove the sole sheet 10 from the sole 31 during work depending on the place where he / she walks.

Since a large number of convex portions 17a are formed on the surface of the rubber layer 14 by embossing, the fine convex portions 17a can be provided on the surface of the rubber sheet by a relatively simple method. As a result, the cost of the sole sheet 10 can be reduced. Further, since a large number of convex portions 17a are formed in a state of being integrated with the main body portion of the rubber layer 14, it is difficult to remove the convex portions 17a even if the sole sheet 10 is used repeatedly, and the convex portions 17a are formed on the surface of the rubber layer 14. The state in which the convex portion 17a is formed can be continuously maintained.

In the sole sheet 10, since the intermediate layer 15 having a cushioning property is interposed between the rubber layer 14 and the adhesive layer 16, flexibility can be imparted to the laminate having the rubber layer 14, and it is easy to be deformed in the thickness direction. can do. As a result, it is possible for the operator to easily attach the shoe sole sheet 10 so as to follow the shape of the shoe sole 31 and to be in close contact with the shoe sole 31. Further, by deforming the intermediate layer 15 following the deformation of the shoe 30 during work, the sole sheet 10 can be made to follow the movement of the shoe 30, and the movement of the operator can be less likely to be hindered.

Since the rubber layer 14 is formed on the surface of the resin film 13 in the sole sheet 10, it is possible to suppress the elongation of the rubber layer 14 and improve the tear resistance. As a result, the strength and durability of the sole sheet 10 can be increased, and the product life can be extended. Further, the deterioration of the sole sheet 10 can be suppressed, and the influence of the deterioration of the sole sheet on the finish of the coating can be reduced.

In order to secure the strength and durability of the sole sheet 10, it is desirable that the sole sheet 10 has a certain thickness. On the other hand, if an attempt is made to secure the thickness of the sole sheet 10 by increasing the thickness of the rubber layer 14, the strength and durability of the sole sheet 10 can be ensured, but the flexibility is not sufficient, and the sole 31 Depending on the shape (degree of unevenness) and the skill of the operator, it is conceivable that the shoe sole sheet 10 cannot be attached well so as to be in close contact with the shoe sole 31. In this respect, since the inner layer of the sole sheet 10 is configured such that a cushioning layer (intermediate layer 15) is interposed between the rubber layer 14 and the adhesive layer 16, the strength, durability and flexibility are well-balanced. It is possible to obtain a shoe sole sheet 10 that also has a combination.

<Second Embodiment>
Next, the second embodiment will be described focusing on the differences from the first embodiment. The second embodiment is different from the first embodiment in that a notch is formed in the outer edge of the sole sheet 10. In the description of the present embodiment, the same reference numerals are given to the same configurations as those of the first embodiment, and the description thereof will be omitted.

As shown in FIG. 4, a plurality of (five in FIG. 4) notches 21 are formed on the outer edge of the sole sheet 10 from the outer end to the inside. Each notch 21 has an acute V-shape so as to be opened from the inside to the outside. Further, each notch 21 is provided only on the toe portion 22 of the outer edge of the sole sheet 10. The number of cuts 21 is not limited to 5, and may be 4 or less, or 6 or more.

When the sole sheet 10 is attached to the sole 31, the operator moves the shoe sole sheet 10 to a position retracted from the outer edge end of the toe portion (for example, the inner end portion of the notch 21) with respect to the attachment surface 11 of the shoe sole sheet 10. The sole 31 is applied (so that the tip of the shoe 30 is located on the sole), and the sole sheet 10 is attached to the sole 31. After that, the protruding portion of the sole sheet 10 formed on the toe portion is bent along the peripheral surface of the shoe 30 and attached to the tip portion of the shoe 30. As a result, as shown in FIG. 5, the tip portion (toe portion) of the shoe can be covered with the sole sheet 10. In this case, when the worker crouches while putting his / her weight on the toes, the sole sheet 10 covering the toes of the shoes 30 prevents the toes of the shoes 30 from coming into direct contact with the coated surface. can do. As a result, it is possible to prevent problems from occurring on the coated surface and deterioration of the workability of the operator.

In particular, the sole sheet 10 has a sheet made of silicone rubber, which is less flexible and less likely to bend than, for example, a non-woven fabric. In this respect, by providing the notch 21 in the toe portion of the sole sheet 10 as in the present embodiment, the sole sheet 10 can be easily bent when the sole sheet 10 is attached so as to cover the toe portion of the shoe 30. , The adhesion between the sole sheet 10 and the shoe 30 can be improved.

After the sole sheet 10 is attached to the sole 31, and before or after covering the tip of the shoe 30 with the sole sheet 10, the shoe sole sheet 10 protrudes from the sole 31 as necessary. You may cut the part with a scissors or the like.

<Other embodiments>
The present invention is not limited to the above embodiment, and may be implemented as follows, for example.

-In the above embodiment, the sole sheet 10 further has a resin film 13, a rubber layer 14, an intermediate layer 15, an adhesive layer 16, and a layer other than the release paper 19 as long as the effect of the present invention is not impaired. You may. For example, an adhesive layer and a second resin film may be further interposed between the intermediate layer 15 and the adhesive layer 16 in order from the intermediate layer 15 side.

In the second embodiment, the shape of the notch 21 formed on the outer edge of the sole sheet 10 is not limited to the acute-angled V-shape as shown in FIG. For example, a linear or curved notch extending inward from the outer circumference may be formed on the outer edge of the sole sheet 10. Alternatively, a curved notch bulging inward of the notch may be formed on the outer edge of the sole sheet 10. Even with these configurations, the protruding portion formed on the toe portion of the sole sheet 10 is bent along the peripheral surface of the shoe 30 and attached to the tip portion of the shoe 30, whereby the tip portion of the shoe 30 is attached. It can be easily covered with the shoe sole sheet 10. As a result, even when the worker crouches and stands on the tiptoe, the rubber layer 14 is interposed between the tip of the shoe 30 and the coated surface, so that the tip of the shoe 30 comes into direct contact with the coating film. It can be suppressed.

-In the second embodiment, the notch 21 is provided only in the toe portion 22 of the outer edge of the sole sheet 10, but the notch 21 may be provided in a portion other than the toe portion 22. For example, the sole sheet 10 is configured to have a large number of notches 21 formed at predetermined intervals over the entire outer peripheral direction. In this case, the entire outer circumference of the lower part of the shoe 30 can be covered with the sole sheet 10 by sequentially bending and attaching the protruding portion between the two notches 21 in the sole sheet 10 along the outer circumference of the shoe 30. ..

A display unit may be provided on the back surface of the shoe sole sheet 10, that is, on the surface of the release paper 19 opposite to the adhesive layer 16 to teach the user the position to attach the shoe sole 31. By providing such a display unit, the user can easily imagine a state in which the shoe sole sheet 10 is attached to the shoe sole 31 before the release paper 19 is peeled off. Therefore, even for a user who uses the sole sheet 10 for the first time, the sole sheet 10 can be easily attached to the sole 31 correctly.

-In the above embodiment, the intermediate layer 15 is formed of a foam material, but the intermediate layer 15 is formed of a non-woven fabric made of polyethylene fiber, polypropylene fiber, acetate fiber, etc., whereby the intermediate layer 15 has cushioning properties. May be.

-In the above embodiment, the shape of the sole sheet 10 is an outer shape corresponding to the shape of the shoe sole 31, but the sole sheet 10 having another outer shape may be used. For example, it may have an outer shape such as a rectangular shape (rectangular shape) or an elliptical shape.

10 ... sole sheet, 12 ... ground plane, 13 ... resin film, 14 ... rubber layer, 15 ... intermediate layer, 16 ... adhesive layer, 17 ... protrusion, 21 ... notch, 30 ... shoes, 31 ... sole.

Claims (4)

A sole sheet for waterproof work that is used when walking on a sticky paint film that has been coated for waterproofing and is attached to the back of shoes.
Adhesive layer and
A rubber layer formed of silicone rubber in order to improve the releasability of the coating film,
It is a laminated body equipped with
The rubber layer has a ground contact surface that is in contact with the floor surface in a state where the adhesive layer is attached to the back of the shoe.
A sole sheet in which a large number of protrusions formed of silicone rubber and projecting in the thickness direction of the laminated body are formed on the ground contact surface. The shoe sole sheet according to claim 1, wherein an intermediate layer having a cushioning property is provided between the adhesive layer and the rubber layer. With more resin film,
The sole according to claim 1 or 2, wherein the rubber layer is formed on one surface of the resin film, and the adhesive layer is arranged on the side opposite to the rubber layer with the resin film interposed therebetween. Sheet. When viewed from the thickness direction of the laminate, the outer shape of the laminate corresponds to the outer shape of the sole of the shoe, and the size of the laminate is larger than that of the sole of the shoe.
The sole sheet according to any one of claims 1 to 3, wherein at least the toe portion of the outer edge of the laminated body has a notch extending inward from the outer circumference and opening to the outer peripheral side.

Images