JP4165469B2 - Staircase - Google Patents

Description

  The present invention relates to a staircase using a resin tread.

  In stairs such as indoor stairs in wooden houses and wooden balconies and decks provided in the garden, it is preferable to use natural wood for the tread board in consideration of harmony with the surroundings in terms of design. However, in recent years, a resin material is often used instead of wood because of a decrease in wood resources, and a resin material is also used for a stair tread (see Patent Documents 1 and 2, for example). Resin-made treads can be manufactured at low cost by extrusion molding or injection molding, are lightweight, and have the characteristics that they are less likely to change over time even when installed outdoors. The resin tread is mixed with wood powder or colored with colored pellets to give it a wooden texture.

When a resin tread is used, the strength of the tread alone is insufficient to support the weight of a person going up and down the stairs, so the tread is reinforced with a metal support member. Conventionally, in consideration of the design surface, a recessed portion is provided on the back side of the tread plate so that the metallic supporting member is not visually recognized from the outside, and the supporting member is accommodated in the recessed portion.
Japanese Utility Model Publication No. 5-83143 Japanese Patent Laid-Open No. 7-34627

  As mentioned above, even when a resin tread is reinforced with a metal support member, the front end of the most loaded tread is made of only resin, so the front end is cracked, etc. Damage sometimes occurred. The present invention has been made in view of the circumstances described above, and an object of the present invention is to provide a staircase that does not cause the tread to be damaged even when a resin tread is used.

  In order to achieve the above object, the staircase of the present invention includes left and right side plates, a resin tread, a metal tread support member, and a mounting bracket. And a rear locking portion at the lower part of the rear side wall, and the tread support member has a hollow reinforcing part at the front part and a hollow supporting part at the lower part, Locked portions are provided at the front and rear, and the tread plate has the front lock portion and the rear lock portion locked to the locked portions of the tread plate support member, and is placed on the support portion of the tread plate support member. The top of the front side wall of the tread is in contact with the reinforcement of the tread support, and the top of the tread is equal to or lower than the upper of the reinforcement of the tread support. The brackets are attached to the left and right side plates respectively, and the tread support members are mounted on the left and right mounting brackets and fixed to the mounting brackets. And wherein the Rukoto.

  In the staircase of the present invention, the resin tread board and the metal tread board support member are firmly and well coupled, and the reinforcing portion of the tread board support member is disposed on the front side of the tread board where a heavy load is concentrated. Since it is firmly reinforced, there is no risk of damage to the tread even when a resin tread is used. In addition, since the upper part of the front side wall of the tread comes into contact with the reinforcing part, and the upper surface of the tread is equal to or lower than the upper surface of the reinforcing part, the load is mainly supported by the reinforcing part to prevent a strong load from being applied to the tread. The breakage of the tread can be reliably prevented, and the design of the stair tread is excellent.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 to FIG. 5 show an embodiment of the staircase of the present invention, which is a staircase for ascending and descending to a balcony 12 installed in a garden. In this stairs, two upper and lower treads 2 and 2 are attached between the left and right side plates 1 and 1, and the tread 2 is reinforced by a resin tread 2 with a metal tread support member 3.

  As the step board 2, a resin tread 2 made by extruding and mixing wood powder with resin is used. As shown in FIG. 1, the tread plate 2 has a rectangular cross section and is formed in a hollow plate shape with vertical ribs 13 provided therein. As shown in FIGS. 1 and 4, the front side wall 5 of the tread 2 has a vertical part 5 a at the upper part, and has an inwardly inclined part 5 b at the lower part of the vertical part. 6 is formed to protrude forward. The front-end | tip of the front side latching | locking part 6 is located in the back side a little rather than the vertical part 5a of the front side wall. The rear side wall 7 is formed symmetrically with the front side wall 5, and has a vertical portion 7 a, an inwardly inclined portion 7 b, and a rear side locking portion 8 protruding rearward in the same manner as the front side wall 5. Various resins such as polyethylene resin, polypropylene resin, ABS resin, and polyvinyl chloride resin can be used as the footboard 2 and waste plastics can also be used. Various woods such as hardwoods and conifers can also be used as the wood powder blended in the resin. However, material costs can be reduced by using construction wastes, thinned woods, and wood chips from wood factories.

  The tread board support member 3 is an extruded shape of an aluminum alloy, has a hollow reinforcing part 9 at the front part, and has a hollow support part 10 that supports the tread board 2 at the lower part on the rear side. On the front side and the rear side of the upper part of the support part 10, there are provided locked parts 11 to which the front side locking part 6 and the rear side locking part 8 of the tread plate 2 are respectively locked. The tread plate 2 and the tread plate support member 3 are made to slide in the longitudinal direction of the member from the side end portions of the tread plate 2 and the rear side lock portion 8 so that the front and rear locked portions 11 of the tread plate support member 3 are engaged. The bottom surface of the tread plate 2 comes into close contact with the top surface of the support portion 10 and the two members are integrally coupled. Further, the tread plate 2 is fixed to the support portion 10 with screws 14 so as not to be displaced from each other. In the state in which the tread board 2 and the tread board support member 3 are combined in this way, as shown in FIG. 1, the front side wall 5 of the tread board 2 is in contact with the reinforcing portion 9 at the upper vertical portion 5 a, and the tread board 2 The upper surface is the same height as the upper surface of the reinforcing portion 9 of the tread board support member 3. An anti-slip material mounting groove 15 is provided on the upper surface of the reinforcing portion 9, and a belt-like anti-slip material 16 made of rubber or soft resin is fitted into the groove 15. The upper surface of the anti-slip material 16 may be higher than the upper surface of the tread plate 2.

  The left and right side plates 1 are formed in a hollow shape having a rectangular cross section by extruding an aluminum alloy. On the inner side surface of the side plate 1, two rows of nut receiving grooves 18 that slidably receive the nuts 17 are formed along the longitudinal direction. As shown in FIG. 3, the vertical wall of the angle-shaped mounting bracket 4 abuts on the inner surface of the side plate 1, and a bolt 19 is screwed into the nut 17 received in the nut receiving groove 18, so that the mounting bracket 4 is It is fixed to the side plate 1. A side end portion of the tread board support member 3 is placed on the horizontal wall of the mounting bracket 4 and fixed with bolts 20. A recess 24 into which the horizontal wall 25 of the mounting bracket 4 is fitted is provided on the lower surface of the tread board support member 3. If the bolt 19 that attaches the mounting bracket 4 to the side plate 1 is loosened, the nut 17 can slide in the nut receiving groove 18 and the height can be adjusted easily, and the number of steps of the step board 2 to be installed can be changed. Easy to do. Each side plate 1 has an upper opening fixed to an outer peripheral surface of a frame 22 of the balcony by a fixture 21 having a U-shaped cross section. The lower opening of the side plate 1 is closed with a lid 26.

  The staircase is configured as described above, and the resin tread 2 is mounted on the support 10 in a state where the front locking portion 6 and the rear locking portion 8 are locked to the locked portion 11 of the tread support member 3. Furthermore, since the reinforcing part 9 of the tread board support member is provided on the front side of the tread board 2 and is firmly reinforced, the reinforcing part 9 mainly bears the load when going up and down the stairs, Even if the tread 2 is made of resin mixed with powder, there is no fear of the tread 2 being damaged. Moreover, since the anti-slip | skid material 16 is attached to the upper surface of the reinforcement part 9, it can prevent sliding a leg | foot when going up and down the stairs.

  The step board 2 used in this staircase is the same as the deck material 23 constituting the floor of the balcony 12, and as shown in FIG. 2, the step board 2 and the deck material 23 have a cross-sectional shape. , Dimensions such as width and height, material, color, texture, etc. are exactly the same. Thus, by using the deck material 23 for the step board 2, there is an advantage that the material cost can be reduced without newly preparing the step board 2, and the design of the floor surface of the balcony and the step board of the stairs can be unified.

It is sectional drawing to which the tread board and the tread board support member were expanded. It is a longitudinal cross-sectional view which shows one Embodiment of the staircase by this invention. It is a front view of the stairs by this invention. It is expanded sectional drawing shown in the state which isolate | separated the tread board and the front side part of the supporting member. It is a perspective view which shows the state which used the staircase of this invention as a staircase for balconies.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Side board 2 Tread board 3 Tread board support member 4 Mounting bracket 5 Front side wall 6 Front side locking part 7 Rear side wall 8 Rear side locking part 9 Reinforcement part 10 Support part 11 Locked part

Claims (1)

The left and right side plates, resin treads, metal tread plate support members, and mounting brackets are provided. The tread has a front locking portion at the lower portion of the front side wall, and the rear locking portions at the lower portion of the rear side wall. The treadle support member has a hollow reinforcing part at the front part and a hollow support part at the lower part, and a locked part is provided at the front and back of the upper part of the support part. The front side locking part and the rear side locking part are respectively locked to the locked parts of the tread board support member, placed on the support part of the tread board support member, and fixed to the tread board support member. The upper part is in contact with the reinforcement part of the tread board support member, and the upper surface of the tread board is equal to or lower than the upper surface of the reinforcement part of the tread board support member, and the mounting brackets are attached to the left and right side plates, respectively. A staircase characterized in that the member is mounted on the left and right mounting brackets and fixed to the mounting bracket.

Images