JP6328601B2 - Nose member and construction method thereof - Google Patents

Description

  The present invention relates to a nose member and a construction method thereof.

  Conventionally, a nose member is generally attached to the front end portion of a tread for the purpose of preventing slipping on the tread when moving up and down stairs.

  In Patent Document 1, a base portion fixed to the front end portion of the upper surface of the step board of the staircase, and a substantially L-shaped cross section that is fitted to the base portion and covers the upper surface of the base portion and the front end surface of the tread plate in this state. A nose member with a cover portion is shown.

JP 2005-207063 A

  However, since the cover part of the nose member of Patent Document 1 is bent in an L-shaped cross section, when cutting according to the shape of the tread with an electric tool at the construction site, if a batten is not used, There is a problem that cracks and chips are likely to occur, and that the cutting work is troublesome.

  Also, even if a batten is used, it is difficult to cut to the desired dimensions, and when the gap between the nose member and the side girders, walls, etc. is caused by the dimensional error of the cover part, the appearance of the staircase construction looks worse To do.

  The present invention has been made in view of the above points, and its main purpose is to improve the structure of the nose member, thereby facilitating the attachment work of the nose member to the tread during construction of the staircase, and a beautiful construction appearance. Is to be obtained.

  In order to achieve the above object, in the present invention, the base part fixed to the tread and the cover part assembled to the base part are made of different materials, and the base member is made of hard resin, but the cover part is easily cut. It was made of soft resin.

Specifically, the first invention is directed to a nose member attached and fixed to the front end portion of the step board of the staircase, and the nose member is fixed to the front end portion of the upper surface of the step board and has a base portion having an engaging portion. And a cover portion that has an engaged portion engageable with the engaging portion, and is removably assembled to the upper surface of the base portion by engagement with the engaging portion of the engaged portion, while the base portion is made of a hard resin, the cover portion ing from soft resin. Furthermore, on the upper surface of the base portion, at least two first and second groove portions extending in the length direction of the base portion as the engaging portion are formed side by side in the width direction of the base portion. On the surface of the cover portion that faces the base portion, at least first and second protrusions extending in the length direction of the cover portion as the engaged portion are arranged in the front-rear direction in the width direction of the cover portion. The cover portion is assembled to the base portion by fitting the first and second ridge portions into the first and second groove portions, respectively. The first ridge portion is provided with a retaining portion that prevents the first ridge portion from slipping out of the first groove portion when the first ridge portion is fitted into the first groove portion. The ridge portion has a larger cross-sectional area and a lower protrusion height than the first ridge portion . In the present invention, the front side is defined as “front” and the back side is defined as “rear” in the depth direction (climbing direction) of the stairs.

In the first aspect of the invention, the base portion of the stair nosing member is fixed to the front front end portion of the step board of the staircase, the cover portion is engaged with the base portion, and the engaged portion of the cover portion is engaged with the engaging portion of the base portion. It is assembled by combining. At this time, the first and second concave grooves formed on the upper surface of the base portion are respectively fitted with the first and second convex ridge portions formed on the cover portion, so that the cover portion becomes the base portion. It is assembled in the mounted state. If the first and second ridges have the same shape, and the soft resin cover part has a slight twist, the first and second ridges are respectively base parts. There is a possibility that the first and second concave groove portions are displaced and simultaneously difficult to be smoothly fitted. However, in the present invention, the cross-sectional area of the second ridge is larger than that of the first ridge, and the height thereof is lower than that of the first ridge, so even if the two ridges are slightly misaligned. The second ridge portion is preferentially fitted into the second groove portion. The cover portion is positioned with respect to the base portion by fitting the second ridge portion into the second groove portion, and the first ridge portion having a small cross-sectional area and a high height is also formed by this positioning. It can be easily fitted to the concave groove. And since this 1st protruding item | line protrudes thinly and largely compared with the 2nd protruding item | line part, if it fits into a 1st recessed groove part, it will become difficult to remove | deviate from a 2nd protruding item | line part. In addition, since the first protruding portion is provided with a retaining portion, the retaining portion prevents the first protruding portion from coming out of the first groove portion. By these, the cover part of a soft resin can be assembled | attached to a base part reliably and smoothly.

In addition, although the base part is made of hard resin, the cover part is soft resin and softer than the base part. Therefore, when the cover part is cut according to the shape of the tread, the cover part can be deformed and cut. Therefore, the cutting becomes easier as compared with the hard resin, and accordingly, the workability of the nose member and the staircase can be improved.

  In addition, since the cover part can be easily cut in this way, it can be accurately cut to a desired dimension, and a gap is hardly generated between the nose member and the side beam, the wall, etc. due to the dimensional error of the cover part. The appearance of the stairs can be improved and its appearance can be improved.

  Moreover, since the cover portion is made of a soft resin, the touch when the stairs are raised and lowered is softer than that of the hard resin cover portion.

Furthermore, if the cover part to be assembled to the base part is made of a hard resin, the engaged part of the cover part may collide with other parts during transportation or the like, or may be displaced to the engaging part of the base part during construction. There is a risk of breakage if engaged in a closed state. However, in the cover part made of a soft resin as in the present invention, they can be prevented .

A second invention is characterized in that, in the first invention, the first ridge is disposed on the rear side of the second ridge.

In the second aspect of the invention, since the first ridge portion having the retaining portion is located on the rear side of the second ridge portion, the cover portion can be more reliably and smoothly assembled to the base portion. it can.

A third invention is the first or second inventions in Oite, the cover portion integrally continuous with a mounting portion to be mounted removably on the upper surface of the base portion, the front end portion of said mounting portion, a cover It is characterized by having a substantially L-shaped cross section having a front surface portion that covers the front end surface of the tread plate in a state where the portion is assembled to the base portion.

In the third aspect of the invention, the cover portion has a mounting portion that is assembled to the upper surface of the base portion and a front surface portion that is integrally continuous with the front end portion of the mounting portion, so that the cover portion is assembled to the base portion. The front end surface of the tread board can be covered with the front portion, and the appearance of the staircase can be improved.

According to a fourth invention, in any one of the first to third inventions, the cover portion is continuous with the rear end portion of the mounting portion and is attached to the base portion of the cover portion in the front portion of the top surface of the tread plate. It has the coating part which covers.

In this 4th invention, since the front part of the tread board upper surface is covered with the coating | coated part in the assembly | attachment state to the base part of a cover part, the external appearance of a staircase can be made excellent.

A fifth invention is a method of constructing any one of the first to fourth invention nosing members, wherein the base portion is fixed to the upper surface of the tread board by at least sticking with a double-sided tape, and then the cover portion is covered. The cover portion is assembled to the base portion by engaging the engaging portion with the engaging portion of the base portion.

In the fifth aspect of the invention, the base portion of the nosing member is fixed to the upper surface of the tread plate by sticking with a double-sided tape, and then the cover portion is engaged with the engaged portion and the engaging portion with respect to the base portion, respectively. Assembled. As described above, the engagement of the engaged portion and the engagement portion and the fixing with the double-sided tape are used in combination to construct the nosing member, so that the workability is excellent and the nosing member can be securely fixed to the tread. it can.

According to the present invention, in the nose member comprising a base portion fixed to the front end portion of the upper surface of the tread plate and a cover portion that is removably assembled to the upper surface of the base portion by an engagement structure, the base portion is made of hard resin, The cover portion is made of a soft resin, and at least two concave groove portions are formed on the upper surface of the base portion so as to be arranged in the front-rear direction in the width direction of the base portion, while at least two ridges are covered on the surface facing the base portion of the cover portion. It is formed side by side in the width direction of the part, so that the cover part can be assembled to the base part by fitting with both concave groove parts of both convex ridge parts, and from one concave groove part to the corresponding convex ridge part The other protrusions have a larger cross-sectional area and a lower protrusion height than the one protrusions. By this , cutting of a cover part becomes easy compared with hard resin, and the construction property of a nose member or a staircase can be improved. Moreover, it becomes difficult to produce a gap between the nose member due to the dimensional error of the cover portion and the side beam, the wall, etc., and the appearance of the construction of the staircase can be made beautiful and its appearance can be improved. In addition, the soft resin cover part softens the touch when the stairs are raised and lowered. Furthermore, the engaged portion of the cover portion can be prevented from being damaged during transportation or construction. Even if the cover portion of the soft resin is somewhat twisted and the two ridge portions of the cover portion are displaced from the two concave groove portions of the base portion, the cover portion of the soft resin can be securely and securely Can be smoothly assembled to the base.

FIG. 1 is a side view of a nose member. FIG. 2 is a side view of the base portion. FIG. 3 is a perspective view when the base portion is viewed from above. FIG. 4 is a side view of the cover portion. FIG. 5 is a perspective view when the cover portion is viewed from below. 6 is an enlarged sectional view taken along line VI-VI in FIG. FIG. 7 is a perspective view of a staircase. FIG. 8 is a side view of the side beam.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The following description of the embodiments is merely illustrative in nature and is not intended to limit the present invention, its application, or its use at all.

  FIG. 7 shows a staircase S on which the nose member 12 according to the embodiment of the present invention is constructed, and this staircase S constitutes a straight staircase. That is, the staircase S is spanned between the left and right side girders 1 and 1 (only the left side is shown) and the side girders 1 and 1 which are arranged and fixed so as to face the base wall W, for example, left and right. And a plurality of kick plates 10, 10,... Provided between a front end portion of the lower surface of the upper step plate 5 and a rear side portion of the upper surface of the lower step plate 5. It is. In the present embodiment, the front side in the depth direction (climbing direction) of the staircase S will be described as “front”, the back side as “rear”, the left side as “left”, and the right side as “right”. .

  As shown in FIG. 8, a tread fitting that extends in the horizontal front-and-rear direction for fitting the left and right end portions (end portions in the length direction) of each tread plate 5 to the opposing surfaces of the left and right side girders 1 and 1 The grooves 2, 2,... And the kick plate fitting grooves 3, 3,... Extending in the vertical direction for fitting the left and right end portions (end portions in the length direction) of the respective kick plates 10 are alternately continued. It is formed as follows.

  As shown in FIG. 6, each of the treads 5 has a tread base material 6 having a predetermined strength, and a surface material 7 integrally attached to the upper surface of the tread base material 6. The tread board substrate 6 is made of a plate material having a predetermined thickness (for example, 36 mm). The material is not particularly limited, and the same material as that used in a general staircase is used. Examples thereof include plywood, particle board, composite plywood, laminated wood, and solid wood. A fitting groove 6 a for fitting the upper end portion of the kick plate 10 is formed at the front end portion of the lower surface of the tread board substrate 6.

  The surface material 7 is a thin plate having a predetermined thickness (for example, 7.5 mm), and includes, for example, a decorative material and at least one of a vibration damping material and a cushion material, which is attached to the back surface thereof. As the decorative material, a woody base material such as MDF or hardboard, a material in which these are impregnated with a resin, or the like is used. As the damping material, a PVC mat, a rubber mat, an asphalt mat, an insulation board, or the like is used. As the cushion material, a non-woven fabric, a resin foam such as urethane, or the like is used. The surface material 7 is not limited to these, and may be a single material or a composite material, and a resin decorative sheet, a resin base material, a wood base material, or the like can be used.

  Further, the means for adhering the surface material 7 to the tread base material 6 is not limited, but particularly when the renewability of the tread plate 5 is required, the surface material 7 may be cleanly peeled off from the tread base material 6 when remodeling. It is desirable to use an adhesive or double-sided tape. The adhesive is preferably a low-tack adhesive or an elastic adhesive. For example, a silylated urethane adhesive, a special silicone resin adhesive, or a modified silicone resin adhesive is used, and an adhesive whose adhesive peel strength is appropriately adjusted is used. Also good. As the double-sided tape, a tape or the like whose one side has low adhesiveness is used.

  Further, the width of the tread base material 6 and the surface material 7 is different from each other in the front-rear direction (step depth direction), and the width of the surface material 7 is greater than the width of the tread base material 6 before and after the base portion 13 in the nose member 12. Is reduced by a width dimension (for example, 26 mm).

  The kick plate 10 is made of the same material as the kick plate used for a general staircase, and is, for example, plywood, particle board, MDF, composite plywood, laminated wood or the like.

  The left and right end portions of each tread plate 5 are fitted into the corresponding tread plate fitting grooves 2 and 2 of the left and right side girders 1 and 1, and the tread plate 5 is connected to the side girders 1 and 1 by a wedge (not shown). It is fixed. That is, each tread board fitting groove 2 has a lower groove side surface inclined rearwardly downward, and the groove width increases toward the rear side, and the tread board 5 is fitted into the tread board fitting groove 2. In some cases, a gap is formed between the rear end of the lower surface of the tread plate 5 and the lower groove side surface of the tread plate fitting groove portion 2, and the tread plate 5 is fixed by driving a wedge into the gap.

  Also, the left and right end portions of each kick plate 10 are fitted into the corresponding kick plate fitting grooves 3 and 3 of the left and right side girders 1 and 1, and the upper end portion of the kick plate 10 is the lower surface of the upper tread base material 6. The lower end portion is fixed to the rear end portion of the lower tread plate 5.

  As shown in FIG. 6, the nose member 12 according to the embodiment of the present invention for preventing a person who ascends and descends the stairs S from slipping on the tread plate 5 is provided at the front end portion (the nose portion) of each tread plate 5. The surface material 7 is attached to the upper surface of the tread base material 6 in the rear (back side) range of the nose member 12, that is, the region excluding the front end portion of the upper surface of the tread base material 6. .

  As shown in FIG. 1, the nose member 12 includes a base portion 13 that is fixed to the upper front end portion of the tread base material 6 in the tread plate 5, and a cover portion 25 that is removably assembled to the base portion 13. Yes. The base portion 13 is made of, for example, an extruded material of hard resin such as ABS, PP, PS in addition to PVC resin.

  As shown in FIGS. 2 and 3, the base portion 13 is a flat plate whose lower surface is fixed to the upper front end portion of the tread base material 6, and the upper surface of the base portion 13 has a widthwise direction. A first concave groove portion 15 extending in the length direction of the base portion 13 is formed at the rear end portion (right end portion in FIG. 2) which is one end side, and a second concave portion extending in the length direction of the base portion 13 at a substantially center in the width direction. The groove portion 16 further has a third concave groove portion 17 extending in the length direction of the base portion 13 at the front end portion (left end portion in FIG. 2) which is the other end side in the width direction. The base portion 13 is formed in parallel with each other so as to be lined up in the front-back direction. On both the front and rear sides of the opening of the first groove 15, plate-like protrusions 19, 19 that protrude toward the center of the opening are integrally formed over the entire length of the first groove 15. Since the projecting portions 19 and 19 project at the opening, the first recessed groove portion 15 has a groove width that is narrower than the intermediate portion in the groove depth direction, so that the groove is a medium-expanded groove. Is formed.

  Further, plate-like projecting portions 19 and 19 projecting toward the center of the opening portion are formed integrally on the front and rear sides of the opening portion of the second groove portion 16 over the entire length direction of the second groove portion 16. As a result of the protrusions 19 and 19 projecting from the opening, the second recessed groove 16 also has a groove width of the opening that is narrower than the intermediate portion in the groove depth direction. Is formed. It should be noted that plate-like projecting portions 19 and 19 projecting toward the center of the opening portion are formed integrally on both sides of the opening portion of the third groove portion 17 over the entire length direction of the third groove portion 17. As a result of the protrusions 19 and 19 projecting from the opening, the third recessed groove 17 is also formed as a groove having a middle width, with the groove width of the opening being narrower than the intermediate portion in the groove depth direction. ing. The only difference between the first and third concave groove portions 15 and 17 on the both sides and the central second concave groove portion 16 is the groove width including the opening, and the other portions are the same, and are located in the front and rear. The first and third groove portions 15 and 17 have the same groove width, and the groove width of the second groove portion 16 at the front and rear center is larger than that of the first and third groove portions 15 and 17. The third concave groove portion 17 is not involved in the assembly of the cover portion 25.

  Further, a positioning piece 20 having a thin thickness extending downward is integrally provided at the front end portion of the lower surface of the base portion 13 so as to protrude in the whole length direction of the base portion 13. It is flush with the front end face. In addition, a concave portion 21 is formed at the bottom portion of the second concave groove portion 16 in the central portion in the groove width direction so as to indicate a position through which the staples and screws are penetrated.

  On the other hand, the cover portion 25 is also made of an extruded material of resin, but the cover portion 25 is made of soft resin such as TPE (for example, TPO, TPU) in addition to PVC resin, for example. The cover portion 25 made of a soft resin is, for example, a PVC base material, and is subjected to an annealing treatment. In order to suppress expansion and contraction due to temperature, the cover portion 25 is forcibly contracted by applying a heat treatment after extrusion. For the soft resin cover 25, a soft material having a hardness of less than 100 degrees is preferably used as a soft material as a raw material for extrusion molding, for example, a cover material of 85 degrees is used.

  As shown in FIGS. 4 and 5, the cover portion 25 includes a flat mounting portion 26 that is removably assembled to the upper surface of the base portion 13 on the lower surface (the surface facing the base portion 13), and the mounting portion 26. And a flat plate-like front surface portion 27 that extends downward in a direction perpendicular to the mounting portion 26, and is formed integrally with the front end portion (one end in the width direction). The cover part 25 has a substantially L-shaped cross section. And the double-sided tape T is stuck to the upper and lower intermediate part of the back surface of the front part 27, and as shown in FIG. 6, the nose member 12 is attached to the tread board 5 of the staircase S, and the base part 13 thereof. Is fixed to the front end portion of the upper surface of the tread plate 5, and the front surface of the cover portion 25 is in the assembled state in which the cover portion 25 is assembled to the base portion 13 by fitting with the groove portions 15 and 16 of the protruding ridge portions 33 and 35 described later. The portion 27 covers the front end surface of the tread base material 6 of the tread plate 5, and the front surface portion 27 is fixed to the front end surface of the tread base material 6 with the double-sided tape T in that state.

  A locking portion 28 extending toward the rear side is integrally formed at the lower end portion of the front surface portion 27. In the free state where the nosing member 12 is not attached to the tread board 5, the locking portion 28 is inclined rearward and upward toward the rear side, and as shown in FIG. When the front surface portion 27 of the cover portion 25 is attached to the tread plate 5 and covers the front end surface of the tread plate base material 6 of the tread plate 5, the locking portion 28 at the lower end thereof is elastically pressed against the lower surface of the tread base material 6 and locked. It has come to be.

  A concave portion 29 for accommodating the front end portion of the base portion 13 and the positioning piece 20 extending downward therefrom is formed at the upper portion of the rear surface (back surface) of the front surface portion 27. The rear surface of the positioning piece 20 is set to be flush with the rear surface of the front surface portion 27 other than the concave portion 29 in a state where the front end portion of the base portion 13 and the positioning piece 20 are accommodated in the concave portion 29. When the cover portion 25 is assembled to the base portion 13 fixed to the tread base material 6, the double-sided tape T is bonded between the rear surface of the front portion 27 of the cover portion 25 and the front end surface of the tread base material 6. So that there is not a large gap that would impede the process.

  Further, a plurality (three in the illustrated example) of anti-slip grooves 30, 30,... Extending parallel to each other in the length direction are formed on the upper surface of the mounting portion 26 side by side in the width direction. Yes. At the rear end portion (the right end portion in FIG. 4) which is the other end of the mounting portion 26 in the width direction, a covering portion 31 whose thickness decreases toward the front end is integrally formed over the entire length direction of the mounting portion 26. Is formed. In the free state in which the nose member 12 is not attached to the tread board 5, the covering portion 31 has a tip that is curved downward, and when the nose member 12 is attached to the tread board 5 as shown in FIG. The tip is pressed against the upper surface of the surface material 7 of the tread plate 5 by elasticity to cover the front part.

  On the lower surface of the mounting portion 26, one plate-like first protrusion as an engaged portion extending in the length direction of the cover portion 25 (mounting portion 26) is provided at the rear end portion on the opposite side to the front surface portion 27. The second protrusion 35 as an engaged part extending in the length direction of the cover part 25 (mounting part 26) protrudes downward in the center part of the width part 33 in the width direction. The protrusions 33 and 35 are provided so as to be arranged in the front-rear direction in the width direction of the cover portion 25 over the entire length direction of the mounting portion 26. In other words, the first ridge 33 is disposed behind the second ridge 35.

  The first ridge portion 33 has a taper-shaped cross section at the tip side portion, and the thickness of the first ridge portion 33 in the front-rear direction (left-right direction in FIGS. 1 and 4) is the first groove portion of the base portion 13. 15, which is smaller than the groove width of the opening 15 and has a downward projecting height set to be smaller than the groove depth of the first groove 15, and the first ridge 33 is formed as the first groove 13 of the base 13. It is comprised so that it can fit in the inside of 15 from the opening part.

  In addition, a retaining portion 34 is integrally formed at the tip of the first ridge 33. The retaining portion 34 has a square cross section integrated with the tip of the first ridge 33, and the sectional shape of the entire first ridge 33 forms an arrow shape by the retaining portion 34. Yes. The thickness of the first ridge 33 at the retaining portion 34 is set larger than the groove width of the opening of the first groove 15, and the first ridge 33 is fitted to the first groove 15. The retaining portion 34 is deformed so that the thickness of the first protruding strip portion 33 at the retaining portion 34 is reduced, and the opening portion of the first recessed groove portion 15 is submerged and fitted therein. In this fitting state, the retaining portion 34 is caught by the projecting portions 19 and 19 on both sides of the opening portion of the first concave groove portion 15, thereby preventing the first convex strip portion 33 from coming out of the first concave groove portion 15. I am doing so.

  On the other hand, unlike the 1st protruding item | line part 33, the 2nd protruding item | line part 35 is thicker than the thickness (the dimension of the front-back direction) of the 1st protruding item | line part 33, and is lower than the protrusion height of the 1st protruding item | line part 33. It has a rectangular cross-section and has a large cross-sectional area and a low protruding height as compared with the first protruding strip portion 33. The thickness of the second ridge 35 is set to be smaller than the groove width of the opening of the second groove 16 of the base portion 13, and the protruding height is set to be smaller than the groove depth of the second groove 16. The second ridge portion 35 can be fitted into the second concave groove portion 16 of the base portion 13 through the opening. And when this 2nd protruding item | line part 35 is fitted to the 2nd recessed groove part 16, the protrusion part 19 of the both sides | surfaces of the thickness direction of the 2nd protruding item | line part 35 and the opening both-sides edge of the 2nd recessed groove part 16 is provided. 19 between the front side surface in the thickness direction of the second ridge 35 and the front edge of the opening of the second groove 16 (left side in FIG. 1). However, it is comprised so that it may become larger than the clearance gap (gap on the right side) between the rear side surface of the thickness direction of the 2nd protruding item | line part 35, and the opening part rear side edge of the 2nd recessed groove part 16. FIG.

  In FIGS. 1 and 4, reference numeral 37 denotes a decorative covering layer integrally formed over the entire outer surfaces of the mounting portion 26, the front surface portion 27, the covering portion 31, and the locking portion 28 of the cover portion 25. The cover layer 37 is formed by being extruded integrally with the cover portion 25 when the cover portion 25 is extruded.

  With the above structure, in the present embodiment, the first and second concave groove portions 15 and 16 on the upper surface of the base portion 13 are both engaging portions, and the first and second convex ridges on the lower surface of the mounting portion 26 in the cover portion 25. The portions 33 and 35 constitute engaged portions that can be engaged with the engaging portion, respectively, and the first and second protrusions 33 and 35 of the cover portion 25 are the first and first portions of the base portion 13, respectively. The cover portion 25 is detachably assembled to the base portion 13 by fitting into the two concave groove portions 15 and 16 (engagement with the engaging portion of the engaged portion).

  Next, a method for constructing the nosing member 12 will be described. Prior to the construction of the stair nosing member 12, the tread plates 5 and the kick plates 10 of the staircase S are constructed on the side girders 1 and 1. For these constructions, first, a plurality of tread plate fitting grooves 2, 2,... And a plurality of kick plate fitting grooves 3, 3 into which the tread plate 5 is fitted on the opposing surfaces of the left and right side girders 1, 1, respectively. ,... Are formed, and the side girders 1 and 1 are fixed to the base wall surface W with their heights adjusted to each other. Next, the left and right ends of the tread base material 6 of each tread plate 5 are fitted into the tread board fitting grooves 2, 2 of the left and right side girders 1, 1. A wedge is driven into the gap between the side surfaces to fix the tread base material 6. In parallel with the fixing of the tread base material 6 to the side girders 1, the kick plate 10 is fixed between the upper and lower tread base materials 6, 6, and the left and right ends of the kick plate 10 are connected to the side girders 1, 1. Are inserted into the fitting grooves 6a of the upper tread board base 6 and the lower end of the kick board 10 is placed at the rear end of the lower tread base board 6. Fix it. Then, after fixing the plurality of tread base materials 6, 6,... And the kick plates 10, 10,... To the side girders 1, 1, an adhesive is applied to the upper surface of each tread base material 6, A surface material 7 is attached to the upper surface of the tread base material 6 with a front end portion being opened.

  Thereafter, the nose member 12 is applied to each tread plate 5. Specifically, first, the base portion 13 of the nose member 12 is placed on the front end portion of the top surface of the tread base material 6 in the tread plate 5, and the base portion 13 is fixed to the top surface of the tread base material 6 with the double-sided tape T. At this time, the positioning piece 20 at the front end portion of the lower surface of the base portion 13 is brought into contact with the front end surface of the tread base material 6 so that the base portion 13 is positioned on the tread base material 6. Thereby, the positioning can be easily performed. Further, the base 13 may be fixed to the upper surface of the tread base material 6 by using a fixing tool (not shown) such as staples or screws. Since the groove width of the second groove portion 16 of the base portion 13 is wider than the other first and third groove portions 15, 17, it is preferable that the fixture is fixed by penetrating the bottom portion of the second groove portion 16. It suffices to pass through the recess 21 formed at the bottom.

  When the base portion 13 is fixed to the tread plate 5 in this way, the cover portion 25 is assembled to the base portion 13 by the mounting portion 26. Specifically, the first ridge 33 on the lower surface of the mounting portion 26 is the first concave groove portion 15 on the upper surface of the base portion 13, and the second ridge portion 35 on the lower surface of the mounting portion 26 is the second concave groove on the upper surface of the base portion 13. The groove portions 16 are respectively fitted (the engaged portions of the cover portion 25 are engaged with the engaging portions of the base portion 13). In addition, while the front end portion of the base portion 13 and the positioning piece 20 are accommodated in the recessed portion 29 of the front surface portion 27 in the cover portion 25, the front surface portion 27 is attached to the front end surface of the tread base material 6 of the tread plate 5 by the double-sided tape T. Fix it. As a result, the cover portion 25 is assembled to the base portion 13.

  In this assembled state, the front surface portion 27 of the cover portion 25 covers the front end surface of the tread base material 6 of the tread plate 5, and the locking portion 28 at the lower end thereof is elastically pressed and locked to the bottom surface of the tread base material 6. . For this reason, the front surface portion 27 is locked and held on the tread base material 6 by the lower end locking portion 28, and in combination with the fixing structure by the double-sided tape T, the front surface portion 27 covers the front end surface of the tread base material 6. The covered state can be kept stable.

  In addition, since the covering portion 31 is provided at the rear end of the mounting portion 26 of the cover portion 25, the covering portion 31 is elastically attached to the base portion 13 in front of the surface material 7 on the upper surface of the tread 5 by the elasticity. It comes into pressure contact with the surface and covers the front part of the surface material 7.

  As described above, when the nosing member 12 is constructed, the base portion 13 is adhered to the upper surface of the tread base material 6 of the tread plate 5 by the double-sided tape T, and then the first and second convex strip portions 33 and 35 ( The engaged portion) is fitted into the first and second recessed groove portions 15 and 16 (engaging portion) of the base portion 13 to assemble the cover portion 25 to the base portion 13, and the front portion 27 of the cover portion 25 is a tread plate. Since it sticks to the front end surface of the base material 6 with the double-sided tape T, the fitting of the both convex strips 33 and 35 and the both concave groove portions 15 and 16 and the sticking with the double-sided tapes T and T are used in combination. Thus, the workability is improved, and the nose member 12 can be securely fixed to the tread plate 5.

  When it is necessary to replace the surface material 7 of the tread 5 for the renovation of the constructed stair S, the tread base 6 remains fitted in the tread fitting groove 2 of the side beam 1. The old surface material 7 is peeled off from the tread base material 6, and then the new surface material 7 is pasted on the upper surface of the original tread base material 6.

Similarly, when the nose member 12 needs to be replaced, the base portion 13 remains fixed to the tread base material 6 of the tread plate 5, and the first and second of the lower surface of the mounting portion 26 of the cover portion 25. The protrusions 33 and 35 are respectively removed from the first and second concave groove portions 15 and 16 of the base portion 13 and the double-sided tape T between the rear surface of the front surface portion 27 and the front end surface of the tread base material 6 is peeled off, thereby covering the cover. The part 25 is removed from the base part 13, and then a new cover part 25 may be assembled to the original base part 13. At that time, since the cover portion 25 is made of a soft resin, the cover portion 25 can be easily detached from the base portion 13.

  In this embodiment, a retaining portion 34 is provided on the first ridge 33 on the lower surface of the mounting portion 26 in the cover portion 25 of the nose member 12, and the second ridge 35 is compared to the first ridge 33. Since it has a large cross-sectional area and a low protruding height, the following effects can be obtained.

  That is, if the first and second ridges 33 and 35 have the same shape, if the cover 25 has some twist due to the characteristics of the soft resin, the mounting portion 26 of the cover 25 is removed. When assembled to the base portion 13, the first and second convex ridge portions 33 and 35 are displaced from the first and second concave groove portions 15 and 16 of the base portion 13 and smoothly fit at the same time. It can be difficult. On the other hand, since the cross-sectional area of the 2nd protruding item | line part 35 is larger than the 1st protruding item | line part 33 like this embodiment, and the height is also lower than the 1st protruding item | line part 33, two protruding item | line parts Even if the positions 33 and 35 are slightly misaligned, the second protrusion 35 is preferentially fitted into the second groove 16. And when this 2nd protruding item | line part 35 fits into the 2nd recessed groove part 16, positioning of the cover part 25 with respect to the base part 13 is performed, and by this positioning, cross-sectional area is small and 1st height is high. The ridge 33 is also easily fitted to the first groove 15. Since this 1st protruding item | line part 33 protrudes thinly and largely compared with the 2nd protruding item | line part 35, if it just fits into the 1st ditch | groove part 15, it will become difficult to remove | deviate from the 2nd protruding item | line part 35. FIG. In addition, since the retaining portion 34 is provided at the tip of the first ridge portion 33, the retaining portion 34 prevents the first ridge portion 33 from coming out of the first groove portion 15. . Accordingly, the mounting portion 26 of the soft resin cover portion 25 can be reliably and smoothly assembled to the base portion 13.

  Further, since the first ridge 33 on the lower surface of the mounting portion 26 of the cover 25 is arranged behind the second ridge 35, the cover 25 can be more securely and smoothly attached to the base 13. Can be assembled.

  And since the thickness of the 2nd protruding item | line part 35 in the front-back direction is thicker than the thickness of the 1st protruding item | line part 33, by any chance, the retaining part 34 at the front-end | tip of the 1st protruding item | line part 33 fracture | ruptures by the effect | action of a strong impact. Even if it is damaged due to aging or the like, and the locking effect of the first ridge 33 on the first groove 15 is reduced, the thick second ridge 35 is replaced by the second groove The locking effect can be maintained by fitting and holding in the cover 16, and the cover portion 25 is not easily dropped from the base portion 13.

  Further, when it is necessary to cut the cover portion 25 according to the length of the tread board 5 (width of the staircase S), the shape, or the like during construction of the nose member 12, the soft resin cover portion 25 is cut off. Since the cover portion 25 can be deformed and cut, the cutting is easier than the case of cutting the hard resin. As a result, the workability of the nose member 12 and the staircase S is improved. be able to.

  Further, since the cover portion 25 can be easily cut, it can be accurately cut to a desired size, and the gap between the nose member 12 and the side girders 1, 1 and the wall due to a dimensional error of the cover portion 25 can be achieved. It becomes difficult to generate a gap, and the appearance of the construction of the staircase S can be made beautiful and its appearance can be improved.

  In addition, if the cover portion 25 to be assembled to the base portion 13 is made of hard resin, the first and second ridge portions 33 and 35 (engaged portions) of the cover portion 25 are also made of hard resin. The hard resin ridges 33 and 35 are damaged when they collide with other parts during transportation or when they are engaged with the hard resin concave grooves 15 and 16 of the base part 13 during construction. There is a risk of doing. However, such a breakage can be effectively prevented in the cover portion 25 made of a soft resin as in the present embodiment.

  Further, the cover portion 25 of the nose member 12 has a substantially L-shaped cross section having a mounting portion 26 that is removably assembled to the upper surface of the base portion 13 and a front surface portion 27 that is integrally continuous with the front end portion of the mounting portion 26. Therefore, in the assembled state of the cover portion 25 to the base portion 13, the front end surface of the tread base material 6 of the tread plate 5 can be covered by the front surface portion 27, and the appearance of the staircase S is made excellent. Can do.

  Further, since the cover portion 25 has a covering portion 31 that is continuous with the rear end portion of the mounting portion 26, the front portion of the surface material 7 on the top surface of the tread plate 5 is covered by the covering portion 31 in the assembled state of the cover portion 25 to the base portion 13. It will be covered and the external appearance of the staircase S can be made excellent.

  Moreover, in this embodiment, since the cover part 25 of the nose member 12 is a soft resin, the touch with respect to the nose member 12 at the time of raising / lowering of the staircase S becomes soft compared with the thing made from hard resin.

Further, in the above-described embodiment, the protrusions 33 and 35 (engaged portions) are provided on the lower surface of the mounting portion 26 of the cover portion 25, and the groove portions 15 and 16 (engagement portions) are provided on the upper surface of the base portion 13, respectively. ing. That is, suppose that the member which provides the protruding line parts 33 and 35 and the recessed groove parts 15 and 16 is reversed, the protruding line parts 33 and 35 are provided on the upper surface of the base part 13, and the recessed groove part 15 and the lower surface of the mounting part 26 of the cover part 25 are provided. When 16 is provided, during the construction of the nosing member 12, the state in which the base portion 13 of the hard member before the cover portion 25 is assembled remains fixed to the tread base material 6 of the tread plate 5 is left. Sometimes, the ridges 33 and 35 on the upper surface of the base portion 13 may hit other objects and be damaged. Moreover, it is easier to install the convex portions 33 and 35 made of soft resin in the concave grooves 15 and 16 made of hard resin than in the reverse case. For these reasons, it is configured as in the above embodiment.

(Other embodiments)
In the above-described embodiment, the two ridges 15, 35 are fitted on the bottom surface of the mounting portion 26 of the cover portion 25 of the nose member 12, and the two ridges 33, 35 are fitted on the top surface of the base portion 13. 16 may be provided, but the number of the ridges and the groove portions into which the ridges are fitted may be three or more .

  Furthermore, in the above embodiment, the cover portion 25 is configured by the mounting portion 26 and the front surface portion 27, but it may be composed of only the mounting portion 26.

  Moreover, in the said embodiment, although the nose member 12 is attached to the step board 5 of the staircase S which makes a straight staircase, the nose member 12 which concerns on this invention can be attached also to the step board of a surrounding staircase. .

  The present invention makes cutting of the cover part easier than hard resin, can improve the workability of the nose member, can improve the appearance of the staircase construction appearance, and is extremely useful and industrial. High availability on.

S Stair T Double-sided tape 1 Side girder 5 Tread plate 6 Tread plate base material 7 Surface material 12 Nose member 13 Base portion 15 First concave groove portion (engagement portion)
16 2nd groove part (engagement part)
DESCRIPTION OF SYMBOLS 20 Positioning piece 25 Cover part 26 Mounting part 27 Front surface part 31 Covering part 33 1st convex part 34 Detachment part 35 2nd convex part

Claims (5)

A nose member attached and fixed to the front end of the staircase tread,
A base portion fixed to the upper front end portion of the tread plate and having an engaging portion;
A cover portion that has an engaged portion engageable with the engaging portion, and is removably assembled to the upper surface of the base portion by engagement with the engaging portion of the engaged portion;
While the base portion is made of a hard resin, the cover portion is Ri Do from soft resin,
On the upper surface of the base portion, at least first and second concave groove portions extending in the length direction of the base portion as the engaging portion are formed side by side in the width direction of the base portion.
At least the first and second protrusions extending in the length direction of the cover portion as the engaged portion are arranged in the front-rear direction in the width direction of the cover portion on the surface of the cover portion facing the base portion. Formed,
The cover part is assembled to the base part by fitting the first and second ridges into the first and second groove parts, respectively.
The first ridge portion is provided with a retaining portion that prevents the first ridge portion from coming out of the first groove portion when the first ridge portion is fitted into the first groove portion,
The nose member, wherein the second ridge has a larger cross-sectional area and a lower protrusion height than the first ridge. In claim 1 ,
The nose member, wherein the first ridge is disposed on the rear side of the second ridge. Oite to claim 1 or 2,
The cover portion includes a mounting portion that is detachably assembled to the upper surface of the base portion, and a front surface portion that is integrally continuous with the front end portion of the mounting portion and covers the front end surface of the treadle in the assembled state to the base portion of the cover portion. A nose member having a substantially L-shaped cross section. In any one of Claims 1-3 ,
The nose member, wherein the cover portion includes a covering portion that is continuous with the rear end portion of the mounting portion and covers the front portion of the upper surface of the tread plate in an assembled state to the base portion of the cover portion. A method of construction of any one of the nosing member according to claim 1-4,
A nose characterized in that the base part is fixed to the upper surface of the tread board by at least sticking with double-sided tape, and then the engaged part of the cover part is engaged with the engaging part of the base part and the cover part is assembled to the base part. Construction method of members.

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