JP7183112B2 - Tread material with protective sheet - Google Patents

Description

This invention is a precut tread plate material that becomes a tread plate (tread plate) of a staircase by construction on site, and a protective sheet having a function as a packing material and a function as a curing material at the time of construction at the site is attached. It relates to a tread member with a seat.

A surface curing material is affixed to the portion of the stair tread packaging that covers the surface of the tread, and a front surface curing material is affixed to the portion that covers the front of the tread. Patent Document 1 discloses a tread surface and a tread front surface of an installed tread that are covered with a portion of the packing material to which the surface curing material is attached and a portion of which the front surface curing material is attached. .

However, the one disclosed in Patent Document 1 also serves as a curing material for the tread on which the packing material is installed, but upon installation, it is necessary to cut the packing material and fix it to the tread with an adhesive tape that is separately prepared. It was necessary to do.

Japanese Unexamined Patent Application Publication No. 2001-2158

The main problems to be solved by the present invention are to make it possible to install this type of tread board with a protective sheet, which is a packing material and a curing material, as a tread board for stairs while being properly protected by the protective sheet. The protective sheet can be easily removed from the tread plate material after the construction work is completed.

In order to achieve the above object, according to the present invention, a tread plate member with a protective sheet is a tread plate member constituting a tread plate of a staircase,
A protective sheet comprising at least a first protective surface portion for the surface of the tread plate material and a second protective surface portion for the front end surface of the tread plate material, which is continuous with the first protective surface portion via a fold line,
An anti-slip surface is formed on the back surface of the first protective surface portion of the protective sheet with a gap between it and the edge of the first protective surface portion, and the anti-slip surface is surrounded by the gap. An adsorption surface is formed.

The surface of the tread board installed as a tread board is covered with the first protective surface part of the protective sheet, the front end surface is covered with the second protective surface part, and the protective sheet is attached to the surface of the tread board material by the adsorption surface of the first protective surface part. Since the protective sheet is adhered to the tread, the design surface of the tread can be stably protected from damage and staining until the construction work is completed. The suction surface is formed so as to surround the anti-slip surface in the first protective surface portion, making it easier to remove the protective sheet from the tread board compared to the case where the suction surface is formed over the entire first protective surface portion. becomes. As a result, it is possible to temporarily remove the protective sheet at the time of inspection before construction of the stairs and to remove the protective sheet after the completion of construction work. On the other hand, the non-slip surface can prevent the protective sheet from slipping, thereby stably securing the cured state in which the protective sheet is adhered to the tread plate material at the desired position. In addition, since the suction surface is formed so as to surround the anti-slip surface, until the construction work is completed, there will be no dust or debris between the anti-slip surface of the first protective surface and the surface of the tread. It is possible to prevent, as much as possible, the situation in which the surface of the tread plate material is damaged by the worker's walking on the tread plate material.

The protective sheet may be provided with a third protective surface portion for the rear surface of the tread plate material, which is continuous with the second protective surface portion via a fold line on the side opposite to the continuous side with the first protective surface portion. , is one aspect of the present invention.

In addition, the protective sheet includes a fourth protective surface portion that is continuous with the first protective surface portion via a fold line on the side opposite to the continuous side with the second protective surface portion and that can be folded into the back side of the tread plate material. It is one of the aspects of the present invention to keep it as it is.

Further, it is one aspect of the present invention that the folding line between the fourth protective surface portion and the first protective surface portion is formed by half-cutting or pressing from the back side of the protective sheet. be done.

Further, it is possible to fold the second protective surface portion in two using an intermediate folding line attached to the second protective surface portion, and to allow the third protective surface portion to be superimposed on the first protective surface portion. , is one aspect of the present invention.

Further, it is one aspect of the present invention that the anti-slip surface is formed by adhering anti-slip paper to the protective sheet.

Further, it is one aspect of the present invention that the adsorption surface is formed by attaching the other surface of an adsorption tape having one surface as the adsorption surface to the protective sheet.

According to the present invention, a tread plate material with a protective sheet can be installed as a tread plate of a stair while being properly protected by the protective sheet, and the tread plate becomes a tread plate after the construction work is finished with the protective sheet. It can be easily removed from the material.

FIG. 1 is a perspective configuration view showing a protective sheet and a tread member separately constituting a tread member with a protective sheet (first example) that constitutes a straight tread portion of a staircase. FIG. 2 is a perspective configuration view of the protective sheet of the first example as seen from the back side. FIG. 3 is a perspective view of the first example. 4 is a cross-sectional view taken along line AA in FIG. 3. FIG. FIG. 5 is a perspective view showing a protective cover used when collectively packing a plurality of footboard members with protective sheets according to the first example, and a plurality of footboard members with protective sheets separated from each other. . FIG. 6 is a perspective configuration diagram showing a state in which a plurality of footboard members with protective sheets according to the first example are packed together. FIG. 7 is a side configuration diagram showing a procedure for unpacking the protective sheet for allowing the protective sheet to function as a curing material when the tread member with the protective sheet of the first example is installed in construction of stairs. FIG. 8 is a perspective view of a main part of a stair constructed using the tread plate member with the protective sheet of the first example as a tread plate. FIG. 9 is a perspective configuration diagram showing the protective sheet and the tread plate material that constitute the tread plate member with the protective sheet (lower stage/second example) that constitutes the turn-back portion of the round staircase. FIG. 10 is a perspective configuration view of the protective sheet of the second example as seen from the back side. FIG. 11 is a perspective view of the second example. 12 is a cross-sectional view at BB position in FIG. 11. FIG. FIG. 13 is a perspective view of a protective sheet-attached tread member (middle stage/third example) that constitutes a turn-back portion of a circular staircase. FIG. 14 is a perspective configuration view of a tread member with a protective sheet (upper stage/fourth example) that constitutes a turn-back portion of a circular staircase. FIG. 15 shows separation of a protective cover used when packing together the second to fourth example tread members with protective sheets and the second to fourth example tread members with protective sheets. It is a perspective block diagram represented by. FIG. 16 is a perspective view showing a state in which the footboard members with protective sheets according to the second to fourth examples are packed together. FIG. 17 is a side configuration diagram showing a procedure for unpacking the protective sheet for allowing the protective sheet to function as a curing material when the tread member with the protective sheet of the second example is installed in construction of stairs. FIG. 8 is a perspective view of a main part of a staircase constructed using the tread plate material with a protective sheet of the second example as treads, and the protective sheet of the tread plate material with a protective sheet of the third example located on the upper tier. is omitted.

A typical embodiment of the present invention will be described below with reference to FIGS. 1 to 18. FIG. The tread plate material 1 with a protective sheet according to this embodiment is a pre-cut tread plate material 2 that becomes a tread plate Sa (tread plate) of the stairs S by construction on site, and functions as a packing material and as a curing material at the time of construction at the site. and a protective sheet 3 is attached.

The protective sheet 3 functions as a packing material during storage and transportation until site construction. A tread board material 2 is installed as a tread board Sa of a staircase S in a state of being protected by a protective sheet 3, and protects the design surface of the tread board Sa from being damaged or soiled until construction work is completed at the time of site construction. In addition, the protective sheet 3 can be easily removed from the tread board material 2 which has become the tread board Sa after the construction work is completed.

As the protective sheet 3, a thick paper material such as corrugated cardboard or cardboard, or a synthetic resin sheet can be used.

(Tread member 1 with a protective sheet that constitutes the straight tread portion of the stairs S)
1 to 8 show a tread member 1 with a protective sheet that constitutes a straight tread portion of a staircase S. FIG. The tread plate member 2 has a rectangular front surface 2a, a rear surface 2b, and a front end surface 2c, a rear end surface 2d, a left end surface 2e, and a right end surface 2f, which are surfaces in the thickness direction.

On the other hand, the protective sheet 3 has the following first to fourth protective surface portions 3a to 3d. Each of the following first to fourth protective surface portions 3a to 3d has a square shape.
(1) A first protective surface portion 3a for the surface 2a of the tread member 2
(2) A second protective surface portion 3b for the front end surface 2c of the tread plate member 2, which is continuous with the first protective surface portion 3a via a folding line (hereinafter referred to as a first folding line 3e).
(3) The tread plate material 2 that is continuous with the second protective surface portion 3b on the side opposite to the continuous side with the first protective surface portion 3a via a folding line (hereinafter referred to as a second folding line 3f). Third protective surface portion 3c for back surface 2b
(4) The tread plate material 2 that is continuous with the first protective surface portion 3a on the side opposite to the continuous side with the second protective surface portion 3b via a folding line (hereinafter referred to as a third folding line 3g). A fourth protective surface portion 3d that can be folded into the back surface 2b side

As shown in FIG. 3, the dimension of the protective sheet 3 in the left-right direction x is slightly shorter than the dimension of the tread plate member 2 in the left-right direction x.

Further, as shown in FIG. 1, the dimension of the protective sheet 3 in the front-rear direction y in the unfolded state (the state in which the protection sheet 3 is flattened without being folded) is twice the dimension in the front-rear direction y of the tread member 2. is slightly larger than the sum of the dimension that is equal to and the dimension that is twice the dimension of the tread plate material 2 in the thickness direction.

Specifically, the dimension of the first protective surface portion 3a in the longitudinal direction y and the dimension of the third protective surface portion 3c in the longitudinal direction y are substantially equal, and are slightly smaller than the dimension of the tread plate member 2 in the longitudinal direction y. ing.
The first protective surface portion 3a is attached to the surface 2a of the tread plate member 2 with the first folding line 3e between the second protective surface portion 3b and the upper corner 2g between the surface 2a of the tread plate member 2 and the front end surface 2c. It is attached to the surface with the adsorption surface 5 described later.
A third folding line 3g between the first protective surface portion 3a and the fourth protective surface portion 3d is located slightly forward of the upper corner 2h between the surface 2a of the tread plate 2 and the rear end surface 2d (see FIG. 4). .
The dimension of the second protective surface portion 3 b in the front-rear direction y is substantially equal to the thickness dimension of the footboard member 2 .
An intermediate folding line 3h that divides the second protective surface portion 3b into upper and lower portions is attached to the middle position of the second protective surface portion 3b in the front-rear direction y.
A fourth folding line 3i and a fifth folding line 3j are attached to the fourth protective surface portion 3d between the third folding line 3g and the end of the fourth protective surface portion 3d. The dimension in the front-rear direction y between the fourth folding line 3i and the fifth folding line 3j is substantially equal to the dimension in the thickness direction of the footboard member 2. As shown in FIG.

All of the first to fifth folding lines 3e to 3j are formed on the protective sheet 3 across the horizontal direction x of the protective sheet 3. As shown in FIG. In addition, the first to fifth folding lines 3e to 3j protect the protective sheet 3 from various linear processes such as half-cutting, pressing lines (ruled lines), perforations, etc., which make the protective sheet 3 easy to fold at those points. It is formed by applying it to the sheet 3 .

In addition, on the back surface of the first protective surface portion 3a, which is part of the back surface 3′ of the protective sheet 3, a non-slip surface 4 is formed with a gap 6 between the edge portion of the first protective surface portion 3a. In addition, a suction surface 5 is formed in the space 6 so as to surround the anti-slip surface 4 .

In the illustrated example, the anti-slip surface 4 has a rectangular contour smaller than that of the first protective surface portion 3a (see FIG. 2). A gap 6 is formed between each side of the anti-slip surface 4 and the edge of the first protective surface portion 3a. That is, the edge that is the side of the first protective surface portion 3a on the first folding line 3e side, the edge that is the side of the first protective surface portion 3a that is on the third folding line 3g side, and the edge that is the left side of the first protective surface portion 3a A space 6 is formed anywhere around the anti-slip surface 4 between the anti-slip surface 4 and the right side edge of the first protective surface portion 3a. As a result, a quadrangular anti-slip surface 4 and a square frame-shaped space 6 surrounding it are formed on the back surface of the first protective surface portion 3a.

In this embodiment, the anti-slip surface 4 is formed by adhering an anti-slip paper 4a to the protective sheet 3. As shown in FIG. The anti-skid paper 4a is made by coating the paper to increase the coefficient of friction on the surface of the paper so that it is difficult to slip on the paper. In this embodiment, one surface of the anti-skid paper 4a, which is formed so as to have a rectangular outline smaller than the first protective surface portion 3a, is placed on the back surface of the first protective surface portion 3a so that the gap 6 as described above is formed. The anti-slip surface 4 is formed by adhering to.

On the other hand, in the illustrated example, the attraction surface 5 is band-shaped and formed at intervals 6 of the rectangular frame. The attraction surface 5 is formed so as to surround the anti-slip surface 4, and the attraction surface 5 as a whole also exhibits the shape of a square frame. The suction surface 5 has a concave portion functioning as a fine suction cup, and when pressed against the surface 2a of the footboard material 2, the suction surface 5 adheres to the surface 2a.

In this embodiment, the adsorption surface 5 is formed by adhering the other surface of an adsorption tape 5a having one surface as the adsorption surface 5 to the protective sheet 3 by adhesion.

By combining the protective sheet 3 with the tread board material 2 as follows, the tread board material 2 is packed with the protective sheet 3 .
(1) The first protective surface portion 3a is adhered to the surface 2a of the footboard material 2 with the suction surface 5, with the first folding line 3e along the upper corner 2g between the surface 2a and the front end surface 2c of the footboard material 2. wear.
(2) The protective sheet 3 is folded along the first folding line 3e so that the second protective surface portion 3b covers the front end surface 2c of the tread plate member 2;
(3) The protective sheet 3 is folded along the second folding line 3f so that the third protective surface portion 3c covers the back surface 2b of the tread plate member 2. As shown in FIG.
(4) The protective sheet 3 is folded along the fourth folding line 3i and further folded along the fifth folding line 3j so that the fourth protective surface portion 3d covers the rear end surface 2d of the tread plate member 2, and the fourth protective surface portion 3d covers the rear end surface 2d. The portion ahead of the five-fold line 3j is made to enter the rear surface 2b side of the tread plate material 2. - 特許庁

The dimension in the front-rear direction y of the protective sheet 3 in the unfolded state as described above is twice the dimension in the front-rear direction y of the footboard member 2 and the dimension in the thickness direction of the footboard member 2. Therefore, the fourth protective surface portion 3d overlaps the third protective surface portion 3c on the back surface 2b of the tread plate member 2 (see FIG. 4).

Further, as described above, the dimension of the protective sheet 3 in the lateral direction x is slightly shorter than the dimension of the tread plate member 2 in the lateral direction x. 2 is designed to be packed at locations other than the left and right ends.

In the illustrated example, a plurality of footboard members 2 packed with protective sheets 3 as described above are stacked in the same direction. The sides are positioned on one imaginary vertical plane, and the front surface 2a side of the lower footboard member 2 of the vertically adjacent footboard members 2 is stacked so as to face the back surface 2b side of the upper footboard member 2. Protective covers 7 are attached to the left and right ends of the tread board members 2 thus superimposed, respectively, and the entire tread board members 2 superimposed as described above are covered by the protective covers 7 and the protective sheet 3. I am trying to cover it (see FIGS. 5 and 6). In FIG. 6, reference numeral 8 denotes a binding band.

At the construction site, the treads 2 packed as described above are unbound by the binding band 8, the protective cover 7 is removed, and the staircase S is constructed using the treads 2. As shown in FIG.

When constructing the stairs, the third folding line 3g is bent, and the fourth protective surface portion 3d is raised toward the front surface 2a of the tread plate 2 using the third folding line 3g as a hinge (Fig. 7(a)). from (b)). Next, the second protective surface portion 3b is folded in two while causing the intermediate folding line 3h to fold (FIGS. 7(b) to (c)), and the third protective surface portion 3c is superimposed on the first protective surface portion 3a ( FIG. 7(d)). In this state, the tread plate material 2 is installed. By such installation, the tread board material 2 becomes the tread board Sa constituting the stairs S. As shown in FIG.

The surface 2a of the tread plate 2 installed in this manner is covered with the first protective surface portion 3a of the protective sheet 3, the front end surface 2c is covered with the second protective surface portion 3b, and the protective sheet 3 is covered with the first protective surface portion Since the surface 2a of the tread plate material 2 is adsorbed by the adsorption surface 5 of 3a, the protective sheet 3 stably protects the design surface of the tread Sa from damage and staining until the construction work is completed. can be done.

The suction surface 5 is formed so as to surround the anti-slip surface 4 on the first protective surface portion 3a, and the protective sheet 3 can be easily attached to the tread compared to the case where the suction surface 5 is formed on the entire first protective surface portion 3a. It becomes possible to remove from the material 2. As a result, it is possible to temporarily remove the protective sheet 3 at the time of inspection before constructing the stairs and to remove the protective sheet 3 after the completion of construction work. On the other hand, the anti-slip surface 4 can prevent the protective sheet 3 from slipping, and a cured state in which the protective sheet 3 is adhered to the tread plate member 2 at a desired position is stably ensured. In addition, since the suction surface 5 is formed so as to surround the anti-slip surface 4, there is no space between the anti-slip surface 4 of the first protective surface portion 3a and the surface 2a of the tread material 2 until the construction work is completed. This prevents as much as possible a situation in which wood chips, dust, and the like enter into the tread plate member 2 and cause damage to the surface 2a of the tread plate member 2 when a worker walks on the tread plate member 2 or the like. Further, the riser Sb constituting the stairs S can be cured by the fourth protective surface portion 3d raised as described above (see FIG. 8).

Using the intermediate folding line 3h attached to the second protective surface portion 3b, the second protective surface portion 3b can be folded in half, and the third protective surface portion 3c can be superimposed on the first protective surface portion 3a. Therefore, the upper side of the surface 2a and the front end surface 2c of the footboard member 2 is strongly protected by the two-layered protective sheet 3 until the construction work is completed (see FIG. 8).

In the illustrated example, the free end side of the third protective surface portion 3c is provided with an adhesive tape 9 that is adhered to the surface 2a of the first protective surface portion 3a in a superimposed state on the first protective surface portion 3a. The combined state can be stably maintained. In FIG. 1, reference numeral 9a denotes a release sheet that covers the adhesive surface of the adhesive tape 9 before use.

Further, in this embodiment, the third folding line 3g between the fourth protective surface portion 3d and the first protective surface portion 3a is half-cut or pressed from the back surface 2b side of the protective sheet 3. are forming. As a result, the fourth protective surface portion 3d, which is raised on the surface 2a side of the tread plate member 2 with the third folding line 3g as a hinge as described above, is tilted in the direction opposite to the raising direction. It can be applied to the fold line 3g. As a result, even if the fourth protective surface portion 3d is not fixed to the riser Sb with a curing tape or the like indicated by reference numeral 10 in FIG. It is now possible to create

(Tread member 1 with a protective sheet that constitutes the folded part of the round staircase S)
9 to 18 show a tread member 1 with a protective sheet, which constitutes a turn-back portion of a circular staircase S. FIG. In the illustrated example, the tread member 2 is shown when the turn-back portion of the circular staircase S is three steps. In FIG. 18, the symbol Sc indicates the inner peripheral side of the folded portion of the winding staircase S, and the symbol Sd indicates the outer peripheral side. The lower step plate member 20 (FIG. 9) and the upper step plate member 21 (FIG. 14) are substantially trapezoidal in plan view, and the middle step plate member 22 (FIG. 13) is substantially pentagonal in plan view.

In this example, the protective sheet 3 for each tread member 2 consists of a first protective surface portion 3a, a second protective surface portion 3b connected to the first protective surface portion 3a via a first folding line 3e, and a The third protective surface portion 3c is continuous with the second protective surface portion 3b on the side opposite to the continuous side with the first protective surface portion 3a.

The first protective surface portion 3 a and the third protective surface portion 3 c have a shape that substantially follows the planar shape of the tread plate member 2 . The first protective surface portion 3a and the third protective surface portion 3c of the protective sheet 3 for the lower and upper tread plate members 20 and 21 are substantially right-angled triangular in plan view. The first protective surface portion 3a and the third protective surface portion 3c are substantially rhombic in plan view.

On the rear surface of the first protective surface portion 3a of the protective sheet 3 for each tread member 2, an anti-slip surface 4 is formed with a gap 6 between it and the edge of the first protective surface portion 3a. A suction surface 5 is formed in the space 6 so as to surround the anti-slip surface 4 .

In this example, the footboard material 2 is packed with the protective sheet 3 by combining the protective sheet 3 with the footboard material 2 as follows.
(1) The first protective surface portion 3a is adhered to the surface 2a of the footboard material 2 with the suction surface 5, with the first folding line 3e along the upper corner 2g between the surface 2a and the front end surface 2c of the footboard material 2. wear.
(2) The protective sheet 3 is folded along the first folding line 3e so that the second protective surface portion 3b covers the front end surface 2c of the tread plate member 2;
(3) The protective sheet 3 is folded along the second folding line 3f so that the third protective surface portion 3c covers the back surface 2b of the tread plate member 2. As shown in FIG.

In the illustrated example, the footboard material 2 packed with the protective sheet 3 as described above is viewed from the inner peripheral side Sc with the middle footboard material 22 positioned at the center. 2, the lower tread plate member 20 is positioned on the right side, and the upper tread plate member 21 is positioned on the left side. and the rear end face 2d of the middle tread plate member 22 and the front end face 2c of the upper tread plate member 21 are brought into contact with each other. The plate-like body 11 is configured so that three footboards Sa can be transported as a set (see FIGS. 15 and 16). In the figure, reference numeral 12 denotes a long protective cover having a substantially U-shaped cross section in the width direction for the rear end face 2d of each tread plate member 2, and reference numeral 8 in FIG. 16 denotes a binding band. is.

In the illustrated example, each side of the plate-like body 11 is further covered with a long protective cover 13 having a substantially U-shaped cross section in the width direction, and three footboard members 2 are packed. It's like In the illustrated example, the bent inner side of the protective cover 13 is directed forward, and the lower portion of the protective cover 13 is brought into contact with the second protective surface portion 3b superimposed on the first protective surface portion 3a of the protective sheet 3. By fixing the upper part of the protective cover 13 to the riser board Sb with the protective tape 10, the riser board sb constituting the stairs S can be cured by the protective cover.

In this example, a portion of the protective sheet 3 positioned on the inner peripheral side Sc of the turn-back portion of the winding staircase S is provided with a perforation indicated by reference numeral 14 in the figure, and this perforation 14 is used. Then, a portion of the protective sheet 3 located on the inner peripheral side Sc is separated, and the tread plate member 2 is exposed from the protective sheet 3 at the end of the tread plate member 2 on the inner peripheral side. is to be installed.

The rest of the configuration of the tread member 1 with the protective sheet that constitutes the turn-back portion of the circular staircase S described above is the same as or substantially the same as the configuration of the tread member 1 with the protective sheet that constitutes the straight tread portion of the staircase S. Since they are the same, the same or substantially the same components are denoted by the same reference numerals, and descriptions thereof are omitted.

It goes without saying that the present invention is not limited to the embodiments described above, but includes all embodiments capable of achieving the objects of the present invention.

S Stair S' Round Stair Sa Tread Sb Risers Sc Inner Peripheral Side Sd Outer Peripheral Side 1 Tread Board Material with Protective Sheet 2 Tread Board Material 2a Front 2b Back 2c Front end face 2d Rear end face 2e Left end face 2f Right end face 2g Upper corner 2h Upper corner 3 protective sheet 3' back surface 3a first protective surface portion 3b second protective surface portion 3c third protective surface portion 3d fourth protective surface portion 3e first folding line 3f second folding line 3g third folding line 3h middle folding line 3i fourth folding line 3j fifth folding line 4 Anti-slip surface 4a Anti-slip paper 5 Adsorption surface 5a Adsorption tape 6 Spacing 7 Protective cover 8 Binding band 9 Adhesive tape 9a Release sheet 10 Curing tape

Claims (7)

a tread material constituting a tread of a stair;
A protective sheet comprising at least a first protective surface portion for the surface of the tread plate material and a second protective surface portion for the front end surface of the tread plate material, which is continuous with the first protective surface portion via a fold line,
An anti-slip surface is formed on the back surface of the first protective surface portion of the protective sheet with a gap between it and the edge of the first protective surface portion, and the anti-slip surface is surrounded by the gap. A footboard material with a protective sheet that forms an adsorption surface. 2. The protective sheet comprises a third protective surface portion which is continuous with the second protective surface portion via a fold line on the side opposite to the continuous side with the first protective surface portion and which faces the rear surface of the tread plate material. tread material with a protective sheet as described in . The protective sheet is provided with a fourth protective surface portion which is continuous with the first protective surface portion via a fold line on the side opposite to the continuous side with the second protective surface portion and which can be folded into the rear surface side of the tread plate material. 3. The tread member with a protective sheet according to claim 2. 4. The tread member with a protective sheet according to claim 3, wherein the folding line between the fourth protective surface portion and the first protective surface portion is formed by half-cutting or pressing from the back side of the protective sheet. Using the intermediate folding line attached to the second protective surface portion, the second protective surface portion can be folded in two, and the third protective surface portion can be superimposed on the first protective surface portion. The tread member with a protective sheet according to claim 4.
The tread member with a protective sheet according to any one of claims 1 to 4, wherein the anti-slip surface is formed by adhering anti-slip paper to the protective sheet. The tread member with a protective sheet according to any one of claims 1 to 4, wherein the suction surface is formed by adhering the other surface of the suction tape having one surface as the suction surface to the protection sheet. .

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