Gap cover and method for closing a gap

Abstract

To securely block a gap between a bridgeboard and a wall finishing member with one kind of cover member even if dimension of the gap is not constant and to seek workability improvement and cost reduction.SOLUTION: A gap cover 10 comprises: a mounting part 11 that is mounted on an edge part 4a of a bridgeboard 4 of a staircase 3; a projecting plate part 12 that projects to one lateral side from one side surface of the mounting part 11; and a corrugation plate part 13 further projecting to one lateral side from a projecting direction tip of the projecting plate part 12 and formed in the state in which a ridge-folding and a valley-folding are alternately repeated with a constant width. The mounting part 11, the projecting plate part 12 and the corrugation plate part 13 are formed integrally, and continuously have the same cross-sectional shape in a lengthwise direction.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a gap cover and a method for closing a gap.

Background Art

[0002] Conventionally, there are many examples in which various evacuation stairs such as special evacuation stairs adopted in multi-story buildings are made of steel frame stairs. In this case, a gap may be formed between the stringer that supports the tread (step board) and the wall finishing material in the building, for example, for the purpose of ensuring a clearance during construction. Further, such a gap may be closed by a gap cover for ensuring safety and improving appearance. For example, the gap cover of Patent Document 1 includes an angled cover body disposed in the gap, a plurality of vertical pieces attached to the cover body, and a support tool bolted to the stringer and located on the wall side. Then, by the support tool, the vertical piece inserted from above between the support tool and the stringer is tightened and held, and the cover body is fixed to the stringer, so that the gap can be closed.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] According to the conventional gap cover, since the vertical piece can be tightened and held by bolt tightening from the staircase side, it has excellent workability. However, a plurality of types of members and fixtures such as bolts are required, and an increase in cost is inevitable. In addition, for the sazara girder, it is also necessary to form holes through which bolts pass and holes into which claws for preventing rotation formed on the support are inserted, so consideration must also be given to the labor and cost in the manufacturing stage. Therefore, it is required to easily and inexpensively close the gap between the sazara girder and the wall finishing material with a single type of cover member. However, the gap formed between the sazara girder and the wall finishing material is not necessarily of a constant dimension for each floor or each wall finishing material of the building, for example, and there has been a problem that it is difficult to close the gap with only a single type of cover member.

[0005] The present invention has been made in view of the above circumstances, and the problem thereof is to be able to reliably close the gap between the sazara girder and the wall finishing material with a single type of cover member even if the gap is not of a constant dimension, and to improve workability and reduce costs.

Means for Solving the Problems

[0006] In order to solve the above problems, the invention according to claim 1 includes a mounting portion mounted on an edge portion of a sazara girder of a staircase, a projecting plate portion projecting laterally from one side surface of the mounting portion, and a corrugated plate portion projecting further laterally from the tip end in the projecting direction of the projecting plate portion and formed in a state where mountain folds and valley folds are alternately repeated at a constant width, wherein the mounting portion, the projecting plate portion, and the corrugated plate portion are integrally formed, and the same cross-sectional shape is continuous in the length direction.

[0007] The invention according to claim 2 is the gap cover according to claim 1, wherein the corrugated plate portion has a plurality of mountain fold portions and a plurality of valley fold portions, and the plurality of mountain fold portions are located on the extension line of the projecting plate portion.

[0008] The invention described in claim 3 is the gap cover described in claim 1 or 2, The protruding plate portion is characterized in that a holding portion is integrally formed on the rear side surface thereof, into which a rod-shaped joint member is inserted and which holds the joint member.

[0009] The invention described in claim 4 is a method for filling a gap formed between a wall finishing material of a building and the brazier by the method described in claim 1. 3 A method for closing a gap using the gap cover according to any one of the preceding claims, Depending on the size of the gap, The method is characterized in that the corrugated plate portion is partially cut off from the tip side in the projection direction and then the mounting portion is attached to the end edge portion of the stringer, or the corrugated plate portion is contracted while the mounting portion is attached to the end edge portion of the stringer. Effect of the Invention

[0010] According to the present invention, even if the gap between the truss and the wall finishing material is not of a uniform dimension, it can be reliably closed with a single type of cover material, thereby improving workability and reducing costs. [Brief description of the drawings]

[0011]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

[0012] Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, although various technically preferable limitations are imposed on the embodiments described below for carrying out the present invention, the technical scope of the present invention is not limited to the following embodiments and illustrated examples. Note that the directions in the following embodiments and illustrated examples are set only for convenience of explanation.

[0013] In FIG. 1, reference numeral 1 indicates a staircase room. This staircase room 1 is a space formed indoors in a building where a staircase 3 is installed, and is surrounded by walls on all sides. The surrounding walls are finished with a wall finishing material 2 exposed inside the staircase room 1. The staircase 3 is a steel-frame folded staircase having a dance floor 3a, and includes a pair of stringers 4 arranged in parallel, and a plurality of treads 5 and a plurality of risers 6 provided between the pair of stringers 4 and supported thereby. Further, a frame plate 3b continuous with the stringers 4 is provided around the dance floor 3a. Note that the staircase 3 in the present embodiment is a steel-frame folded staircase provided indoors, but is not limited thereto. That is, an outdoor staircase not provided in the staircase room 1 may be used, or a type of staircase other than a folded staircase may be used. Further, a wooden staircase may be used, or the risers 6 may not be provided. In any case, the staircase 3 shall include stringers 4 and a plurality of treads 5.

[0014] The stringer 4 located on the side of the wall finishing material 2 is arranged with a gap S left between it and the wall finishing material 2. Further, the stringer 4 is inclined along the ascending and descending direction of the staircase 3, and the inclined edge portion 4a thereof protrudes above the upper surfaces of the plurality of treads 5. The gap S is formed, for example, for the purpose of ensuring a clearance during the construction of the staircase 3. Such a gap S is closed by a gap cover 10 for ensuring safety and improving the appearance.

[0015] As shown in FIG. 2, the gap cover 10 includes a mounting portion 11, a protruding plate portion 12, and a corrugated plate portion 13. The mounting portion 11, the protruding plate portion 12, and the corrugated plate portion 13 are integrally formed and are an extruded product with the same cross-sectional shape continuously in the length direction. Note that the material of the gap cover 10 in this embodiment is a vinyl chloride resin, but other materials capable of extrusion molding may be used.

[0016] The mounting portion 11 is a portion mounted on the edge portion 4a of the slat 4, and has a central plate portion 11a, a first side plate portion 11b, and a second side plate portion 11c, and is formed in a substantially U-shaped (concave-shaped, J-shaped) cross section. The central plate portion 11a is a plate portion that contacts the end face of the slat 4 (the upper surface of the edge portion 4a). The first side plate portion 11b is a plate portion integrally formed at one end portion (left end portion) of the central plate portion 11a and contacting one side surface (left side surface) of the slat 4. The second side plate portion 11c is a plate portion integrally formed at the other end portion (right end portion) of the central plate portion 11a and contacting the other side surface (right side surface) of the slat 4.

[0017] The first side plate portion 11b is formed longer downward than the second side plate portion 11c. That is, it is set to be long in the direction away from the central plate portion 11a. This is because the protruding plate portion 12 and the corrugated plate portion 13 are provided to protrude on the first side plate portion 11b side, and it is possible to support the weight of the protruding plate portion 12 and the corrugated plate portion 13 and the movement of the corrugated plate portion 13 that has elasticity and bends.

[0018] Note that the mounting portion 11 is adhesively fixed to the edge portion 4a of the slat 4 with an adhesive such as a modified silicone-based adhesive. The distance between the first side plate portion 11b and the second side plate portion 11c is set to be substantially equal to or slightly wider than the thickness dimension of the edge portion 4a of the slat 4 so that the adhesive can be reliably filled.

[0019] The protruding plate portion 12 is a plate-like portion that protrudes from one side surface (left side surface) of the mounting portion 11 to one side (left side). The overhanging plate portion 12 of the present embodiment is integrally formed at a corner formed by the central plate portion 11a and the first side plate portion 11b of the mounting portion 11, and the surface (upper surface) of the overhanging plate portion 12 and the surface (upper surface) of the central plate portion 11a are flush. However, it is not limited to this, and the overhanging plate portion 12 may be provided below the central plate portion 11a, and a step may be formed between the overhanging plate portion 12 and the central plate portion 11a. Also, the inner corner portion formed by the mounting portion 11 and the overhanging plate portion 12 is a curved surface, and accordingly, the plate thickness is slightly increased. This makes it easier to support the weight of the overhanging plate portion 12 and the corrugated plate portion 13, and the movement of the corrugated plate portion 13 that has elasticity and bends.

[0020] A rod-shaped joint member J is inserted into the back surface of the overhanging plate portion 12, and a holding portion 12a for holding the joint member J is integrally formed. The joint member J is used when connecting two gap covers 10 in the length direction. The holding portion 12a is composed of one and the other holding pieces formed in a hook shape, and these one and the other holding pieces are arranged at intervals. Therefore, the one and the other holding pieces have some elasticity, making it easier to insert the joint member J.

[0021] The corrugated plate portion 13 projects further to one side (left side) from the tip in the projecting direction (left end portion) of the overhanging plate portion 12, and is a portion formed in a state where mountain folds and valley folds are alternately repeated at a constant width. Therefore, the corrugated plate portion 13 is easy to expand and contract in the projecting direction and the opposite direction (left - right direction), and is easy to swing on the front and back sides (up - down direction) of the overhanging plate portion 12. That is, the corrugated plate portion 13 has a shape that exhibits elasticity in a direction orthogonal to its own length direction. Therefore, when the corrugated plate portion 13 is contracted in the direction opposite to the projecting direction (toward the overhanging plate portion 12 side), it tries to return to the projecting direction (toward the wall finishing material 2 side).

[0022] More specifically, the corrugated plate portion 13 is in a state where the plate is formed into a waveform (bellows-like, accordion-like), and has a plurality of mountain-fold portions 14 located above and a plurality of valley-fold portions 15 located below. In the present embodiment, the plate constituting the corrugated plate portion 13 bends downward from the tip of the overhanging plate portion 12 in the overhanging direction, and the plate extending downward bends upward at a predetermined position, so that the first valley-fold portion 15 from the right is formed. Then, the plate extending upward bends downward at a predetermined position, so that the first mountain-fold portion 14 from the right is formed. By repeating such mountain-fold and valley-fold forms alternately with a certain width, the corrugated plate portion 13 as shown in FIG. 2 is formed. In addition, the plurality of mountain-fold portions 14 are located on the extension lines of the central plate portion 11a and the overhanging plate portion 12 in the mounting portion 11. That is, the uppermost position where the plate constituting the corrugated plate portion 13 bends is set to be equal to the height positions of the central plate portion 11a and the overhanging plate portion 12 in the mounting portion 11.

[0023] The width dimension W1 of the surface (upper surface) on the outer corner side of the mountain-fold portion 14 is set to be longer than the width dimension W2 of the surface (lower surface) on the outer corner side of the valley-fold portion 15. That is, the surface on the outer corner side of the mountain-fold portion 14 is formed wider. The mountain-fold portion 14 located on the extension line of the central plate portion 11a in the mounting portion 11 becomes a portion exposed on the surface like the central plate portion 11a and the overhanging plate portion 12, so that light is likely to be reflected and the appearance may be improved.

[0024] Also, among the mountain-fold portion 14 and the valley-fold portion 15, at least on the surface on the outer corner side of the mountain-fold portion 14, a notch groove 14a is formed along the length direction. In the present embodiment, a notch groove 14b is also formed along the length direction on the surface on the inner corner side of the mountain-fold portion 14. Further, a notch groove 15a is formed along the length direction on the surface on the outer corner side of the valley-fold portion 15. The cutout grooves 14a, 14b, and 15a function as lines serving as marks when partially cutting off the corrugated plate portion 13 from the tip side in the protruding direction. That is, for example, at the site, a cut can be made along the cutout grooves 14a, 14b, and 15a with a cutter, and the corrugated plate portion 13 can be separated from the portion where the cut is made. Alternatively, depending on the depth of the cutout grooves 14a, 14b, and 15a, the corrugated plate portion 13 can be separated manually without inserting a cutter.

[0025] In the present embodiment, in a normal state, the corrugated plate portion 13 includes three mountain-fold portions 14 and four valley-fold portions 15. Also, among the corrugated plate portions 13, the end portion located at the tip (left end portion) in the protruding direction is the closest to the wall finishing material 2, and thus is referred to as the wall-side end portion 140. This wall-side end portion 140 is pressed against the wall finishing material 2 by the elasticity of the corrugated plate portion 13. When the gap cover 10 is attached to the edge portion 4a of the lattice 4, the gaps between the mountain-fold portions 14 in the corrugated plate portion 13 are exposed. Therefore, for example, a caulking material (wet sealing material) may be filled in the gaps between the mountain-fold portions 14 to fill the gaps and make the surface flush with the surfaces of the central plate portion 11a and the protruding plate portion 12. The caulking material to be filled is preferably the same color as the gap cover 10 or transparent (colorless), but a device may be made to enhance the design by filling with a caulking material of a different color.

[0026] Note that the position of the wall-side end portion 140 changes depending on which mountain-fold portion 14 of the corrugated plate portion 13 the tip in the protruding direction is cut off. When partially cutting off the corrugated plate portion 13 from the tip side in the protruding direction, basically, it is cut off at the position of the mountain-fold portion 14. If it is cut off at the position of the mountain-fold portion 14, a wide upper surface remains after cutting off, and the wall-side end portion 140 will also be located on the extension line of the central plate portion 11a in the mounting portion 11, so it looks good. However, it is not limited to this, and it may be cut off at the position of the valley-fold portion 15.

[0027] Since the corrugated plate portion 13 is shaped to exhibit elasticity in a direction orthogonal to its own length direction as described above, for example, when the staircase 3 sways due to an earthquake or the like and moves closer to or farther away from the wall finishing material 2, the corrugated plate portion 13 may only need to expand and contract. That is, the influence of the sway of the staircase 3 on the overhanging plate portion 12 and the mounting portion 11 is less likely to occur, so damage to the overhanging plate portion 12 and the mounting portion 11 can be prevented. As described above, even if the gap between the mountain-fold portions 14 is filled with a caulking material, since the caulking material exhibits a certain degree of elasticity, it does not significantly inhibit the expansion and contraction deformation of the corrugated plate portion 13.

[0028] In order to close the gap S formed between the stud 4 located on the side of the wall finishing material 2 and the wall finishing material 2 by the gap cover 10 configured as described above, as shown in FIG. 3, according to the dimension of the gap S, the corrugated plate portion 13 is partially cut off from the tip side in the overhanging direction and then the mounting portion 11 is mounted on the edge portion 4a of the stud 4, or the mounting portion 11 is mounted on the edge portion 4a of the stud 4 while contracting the corrugated plate portion 13. That is, the corrugated plate portion 13 functions as a part for adjusting the distance between the overhanging plate portion 12 and the wall finishing material 2. When adjusting the distance, there are a pattern of partially cutting off the corrugated plate portion 13 from the tip side in the overhanging direction, a pattern of contracting the corrugated plate portion 13 without cutting it off, and a pattern of cutting off the corrugated plate portion 13 and then contracting it. In addition, when the length from one side surface of the stud 4 to the wall-side end portion 140 of the corrugated plate portion 13 in the gap cover 10 is equal to the dimension of the gap S, it is not necessary to contract the corrugated plate portion 13.

[0029] FIG. 3 shows the closed state of the gap S by the gap cover 10. Each of the gaps S shown in FIGS. 3(a) to (d) has different dimensions, and the dimensions become shorter in order from FIG. 3(a). FIG. 3(a) shows an example of closing the gap S by the gap cover 10 without cutting off the corrugated plate portion 13. The wall-side end portion 140 is in contact with the wall finishing material 2. FIG. 3(b) shows an example in which the corrugated plate portion 13 is partially cut off at the positions of the notch grooves 14a and 14b in the middle of the three mountain-fold portions 14. The wall-side end portion 140 is in contact with the wall finishing material 2. FIG. 3(c) shows an example in which the corrugated plate portion 13 is partially cut off at the positions of the notch grooves 14a and 14b in the mountain-fold portion 14 located closest to the overhanging plate portion 12 among the three mountain-fold portions 14. The wall-side end portion 140 is in contact with the wall finishing material 2. FIG. 3(d) shows an example in which the corrugated plate portion 13 is partially cut off at the position of the notch groove 15a in the valley-fold portion 15 located closest to the overhanging plate portion 12 among the four valley-fold portions 15. The slightly remaining corrugated plate portion 13 shrinks to the opposite side of the overhanging direction and is in contact with the wall finishing material 2 as a whole. In any of the examples shown in FIG. 3, the gap S can be surely closed by the gap cover 10. In other words, even if the dimensions of the gap S are different, it can be closed with one type of gap cover 10.

[0030] Further, the gap cover 10 is, for example, a long member about 2000 to 3000 mm in length for one piece. And, as shown in FIGS. 4 and 5, there are cases where a plurality of such long gap covers 10 are used and abutted straight in the length direction to be continuous, or abutted at different angles to be continuous. That is, it is possible to make the gap S not appear from the upper entrance portion to the lower entrance portion of the staircase 3 extending from the lower floor to the upper floor of the building by making a plurality of gap covers 10 continuous.

[0031] FIG. 4 shows an example in which a plurality of gap covers 10 are attached to the edge portion 4a of the sazara beam 4 formed such that the lower end portion and the upper end portion extend horizontally and the portion between the lower end portion and the upper end portion extends obliquely, and the gap S between the gap cover 10 and the wall finishing material 2 is closed. When attaching the gap cover 10 to the edge portion 4a of the rattan-shaped rung 4 that changes its angle vertically in the middle in this way, the end portion in the length direction of the gap cover 10 is cut at a predetermined angle. When the angle of the diagonal portion with respect to the horizontally extending portion of the rattan-shaped rung 4 is set to, for example, 130 degrees (step gradient 50 degrees), if the adjacent end portions of the plurality of gap covers 10 are cut at 65 degrees in a side view, when the plurality of gap covers 10 are made continuous, they can be made continuous at a desired set angle. That is, it may be cut at an angle that is half of the set angle. When making the plurality of gap covers 10 continuous straight in the length direction, there is no need to cut, but it is preferable to connect them with the joint member J to enhance the integrity. If an angled joint member J is adopted, it is also possible to connect the plurality of gap covers 10 that are continuous at different angles.

[0032] FIG. 5 shows a state in which a plurality of gap covers 10 are continuous when closing the gap S between a portion where the angle changes in a direction intersecting in a plan view, such as the frame plate 3b at the corner of the dance floor 3a, and the wall finishing material 2. Also in the case of making continuous at different angles along the horizontal direction in this way, the end portion in the length direction of the gap cover 10 is cut at a predetermined angle. For example, when changing the angle at a right angle in a plan view, if the adjacent end portions of the plurality of gap covers 10 are cut at 45 degrees in a plan view, when the plurality of gap covers 10 are made continuous, they can be made continuous at a right angle. If an angled joint member J is adopted, it is also possible to connect the plurality of gap covers 10 that are continuous at different angles.

[0033] The gap cover 10 as described above is to be attached to the upper edge portion 4a of the rattan-shaped rung 4, but it may be attached to the lower edge portion 4a of the rattan-shaped rung 4. Thereby, the gap S between the rattan-shaped rung 4 and the wall finishing material 2 when looking up at the staircase 3 from below can be closed by the gap cover 10, so it looks good.

[0034] In addition, since the corrugated plate portion 13 is manufactured from a material such as vinyl chloride resin or other extrudable materials as described above, a portion cut off according to the dimension of the gap S in the corrugated plate portion 13 may be recyclable. If recycled, it is preferable because cost reduction can be achieved.

[0035] According to the present embodiment, the following excellent effects are obtained. That is, the gap cover 10 includes a mounting portion 11 mounted on the edge portion 4a of the stringer 4 of the step 3, a projecting plate portion 12 projecting from one side surface of the mounting portion 11 to one side, and a further projection from the tip of the projecting plate portion 12 in the projecting direction to one side. And a corrugated plate portion 13 formed in a state where mountain folds and valley folds are alternately repeated at a constant width. The mounting portion 11, the projecting plate portion 12, and the corrugated plate portion 13 are integrally formed, and the same cross-sectional shape is continuous in the length direction. Therefore, by simply mounting the mounting portion 11 on the edge portion 4a of the stringer 4, the gap S formed between the stringer 4 and the wall finishing material 2 can be closed by the projecting plate portion 12 and the corrugated plate portion 13. Since the corrugated plate portion 13 is formed in a state where mountain folds and valley folds are alternately repeated at a constant width, it is easy to expand and contract in the projecting direction and the opposite direction, and it is easy to swing on the front surface side and the back surface side of the projecting plate portion 12. That is, the corrugated plate portion 13 has a shape that exhibits elasticity in a direction orthogonal to its own length direction. Therefore, even if the dimension of the gap S between the stringer 4 and the wall finishing material 2 is short, if the corrugated plate portion 13 is contracted, the projecting plate portion 12 and the corrugated plate portion 13 can be arranged in the gap S. Therefore, the space between the stringer 4 and the wall finishing material 2 can be closed by the projecting plate portion 12 and the corrugated plate portion 13. When the dimension of the gap S is shorter, the corrugated plate portion 13 may be partially cut off from the tip side in the projecting direction. Thereby, even if the gap S between the stringer 4 and the wall finishing material 2 is not of a constant dimension, it can be surely closed by the gap cover 10 which is a kind of cover member, and the workability can be improved and the cost can be reduced. In addition, since no processing for mounting the gap cover 10 is required on the step 3 side, it can also contribute to the reduction of the overall labor and cost related to the manufacture and installation of the step 3.

[0036] Further, the mounting portion 11 has a central plate portion 11a that contacts the end face of the bamboo-shaped rod 4, a first side plate portion 11b that is integrally formed at one end of the central plate portion 11a and contacts one side surface of the bamboo-shaped rod 4, and a second side plate portion 11c that is integrally formed at the other end of the central plate portion 11a and contacts the other side surface of the bamboo-shaped rod 4. The overhanging plate portion 12 is integrally formed at the corner formed by the central plate portion 11a and the first side plate portion 11b of the mounting portion 11, and the surface of the overhanging plate portion 12 and the surface of the central plate portion 11a are flush. Therefore, the surface from the central plate portion 11a to the overhanging plate portion 12 of the mounting portion 11 can be presented as one surface, which looks good.

[0037] Also, the corrugated plate portion 13 has a plurality of mountain-fold portions 14 and a plurality of valley-fold portions 15. Since the plurality of mountain-fold portions 14 are located on the extension line of the overhanging plate portion 12, the surfaces of the plurality of mountain-fold portions 14 in the corrugated plate portion 13 can be presented in a state where continuity is felt from the overhanging plate portion 12, which looks good.

[0038] Also, among the mountain-fold portion 14 and the valley-fold portion 15, at least on the surface of the outer corner side of the mountain-fold portion 14, a notch groove 14a is formed along the length direction. Therefore, the notch groove 14a can be used as a mark when partially cutting off the corrugated plate portion 13 from the tip side in the overhanging direction. Furthermore, the notch groove 14a can also function as a guide when making a cut with a cutter or the like. Thus, the operation of partially cutting off the corrugated plate portion 13 from the tip side in the overhanging direction can be easily performed, contributing to the improvement of workability.

[0039] Also, the width dimension W1 of the surface of the outer corner side of the mountain-fold portion 14 is set to be longer than the width dimension W2 of the surface of the outer corner side of the valley-fold portion 15. Therefore, a wider exposed surface can be ensured compared to the valley-fold portion 15, light is more likely to be reflected, and the appearance can be improved in the same way as the central plate portion 11a and the overhanging plate portion 12 of the mounting portion 11.

[0040] In addition, on the back surface of the protruding plate portion 12, a rod-shaped joint member J is inserted, and a holding portion 12a for holding the joint member J is integrally formed. Therefore, when connecting a plurality of gap covers 10 continuously, the joint member J inserted into the holding portion 12a can be used for connection to enhance the integrity. Furthermore, if a plurality of gap covers 10 can be connected by the joint member J, the surfaces of the protruding plate portions 12 of the continuous plurality of gap covers 10 are less likely to shift, resulting in a good appearance. Moreover, since the joint member J can be held by the protruding plate portion 12 which is a plate-shaped portion, the gap cover 10 can be in a state where a core passes through it, and the gap cover 10 can be reinforced.

[0041] Also, when closing the gap S formed between the wall finishing material 2 and the sazara beam 4 with the gap cover 10, according to the dimension of the gap S, the corrugated plate portion 13 can be partially cut off from the tip side in the protruding direction and then the mounting portion 11 can be mounted on the edge portion 4a of the sazara beam 4, or a method of mounting the mounting portion 11 on the edge portion 4a of the sazara beam 4 while contracting the corrugated plate portion 13 can be adopted. Therefore, without using unnecessary members other than the gap cover 10 as much as possible, the gap S can be closed only by changing the form of the gap cover 10. As a result, even if the gap S between the sazara beam 4 and the wall finishing material 2 does not have a constant dimension, it can be surely closed by the gap cover 10 which is a kind of cover member, and the workability can be improved and the cost can be reduced.

Explanation of Reference Numerals

[0042] 1 Stairwell 2 Wall finishing material 3 Stairs 3a Dance floor 3b Frame board 4 Sazara beam 4a Edge portion 5 Step board 6 Kicking board 10 Gap cover 11 Mounting portion 11a Central plate portion 11b First side plate portion 11c Second side plate portion 12 sheet outlet part 12a holding part 13 corrugated plate part 14 mountain fold part 14a notch groove 14b notch groove 140 wall side end 15 valley fold part 15a notch groove S gap J joint member W1 width dimension W2 width dimension

Claims

1. a mounting portion mounted on an edge portion of a step tread; an overhanging plate portion projecting laterally from one side surface of the mounting portion; a corrugated plate portion projecting further laterally from the distal end in the overhanging direction of the overhanging plate portion and formed in a state where mountain folds and valley folds are alternately repeated at a constant width; and the mounting portion, the overhanging plate portion, and the corrugated plate portion are integrally formed, and a gap cover characterized in that the same cross-sectional shape is continuous in the length direction.

2. the corrugated plate portion has a plurality of mountain fold portions and a plurality of valley fold portions; the gap cover according to claim 1, characterized in that the plurality of mountain fold portions are located on an extension line of the overhanging plate portion.

3. the gap cover according to claim 1 or 2, characterized in that a rod-shaped joint member is inserted into a back surface of the overhanging plate portion, and a holding portion for holding the joint member is integrally formed.

4. A method of closing a gap formed between a wall finishing material of a building and the step tread with the gap cover according to any one of claims 1 to 3, according to the dimensions of the gap, either cutting off a part of the corrugated plate portion from the distal end side in the overhanging direction and then mounting the mounting portion on the edge portion of the step tread, or mounting the mounting portion on the edge portion of the step tread while contracting the corrugated plate portion, a method of closing the gap.

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