JP4525466B2 - Variable angle staircase - Google Patents

Description

  The present invention relates to a variable angle staircase provided in a building and corresponding to an installation place having a different slope.

Many common staircases in buildings are equipped with girders and treads. In the construction of stairs, it is necessary to fix the treads horizontally, but naturally, the slopes differ if the installation location of the stairs is different. Therefore, in a staircase having a conventional girder and a tread board, it is necessary to measure the installation location of the staircase and to individually design and process the girder and the tread board according to the gradient of the installation location. Therefore, it takes time for processing and takes time for manufacturing.
On the other hand, Japanese Utility Model Laid-Open No. 3-71030 discloses a variable gradient staircase in which a tread is rotatably held by a girder and the tread is fixed by a connecting plate. This eliminates the need to individually design and process the stairs even if the slopes of the stairs are different. However, since this structure is complicated, there is a problem that construction is troublesome, and the inclination of the tread can be adjusted only in steps, and the tread inclination cannot be finely adjusted.
Japanese Utility Model Publication No. 3-71030

  This invention is invented in view of the said background art, The subject is corresponding to all gradients and providing the angle variable staircase which can be constructed easily.

In order to solve the above problems, the present invention provides a variable angle staircase in which a plurality of tread board support members are provided at intervals in the longitudinal direction of a girder, and the tread board is rotatably attached to the girder via the tread board support member. in, step board support member Ri is Na and a vertical piece mounted rotatably on horizontal plate and column for mounting on the treadle, the vertical piece, and the upper end of the stairs down direction is substantially right-angled triangle having a substantially right angle In addition, a lower end of the vertical piece staircase in the descending direction is provided with a support shaft attachment hole for attaching a bolt as a support shaft, and a plurality of attachment holes for attaching a nail for fixing the rotation of the vertical piece. This is a variable angle staircase characterized in that it is provided with a fixing means for fixing the vertical piece so as not to rotate with respect to the girder.

  In the variable angle staircase of the present invention, the tread support member for attaching the tread to the girder comprises a horizontal piece for mounting the tread and a vertical piece that can be pivotally attached to the girder. Even if the slope of the installation location of the stairs is different, the same member can be used. In addition, since the fixing means for fixing the vertical piece so as not to rotate with respect to the girder is provided, the mounting gradient of the tread plate can be determined freely and then fixed so as to have a fixed mounting gradient.

FIG. 1 shows an angle variable staircase that is an embodiment corresponding to all of claims 1 to 4 of the present application. As shown in FIG. 1, the variable angle staircase of this embodiment is provided with a plurality of tread board support members 2 spaced in the longitudinal direction of the girder 1, and the tread board 3 is rotated with respect to the girder 1 via the tread board support member 2. In the variable angle staircase attached movably, the tread board support member 2 includes a horizontal piece 4 on which the tread board 3 is mounted and a vertical piece 5 that is pivotably attached to the girder 1. Fixing means is provided for fixing so as not to rotate.

  Further, a fixing hole 6 is provided in the vertical piece 5 of the tread board support member 2 and the nail 7 is inserted into the beam 1 through the mounting hole 6 to fix the vertical piece 5 so as not to rotate with respect to the beam 1. It is a means.

Further, the tread board support member 2 is a substantially U-shape comprising a plate-like horizontal piece 4 and two vertical pieces 5 which are formed in a plate shape and are substantially suspended from the horizontal piece 4. The girder 1 is sandwiched between the U-shaped opening 8 side, and the tread plate support member 2 is rotatable with respect to the girder 1 through a support shaft 9 provided in the U-shaped opening 8 and extending in the thickness direction of the girder 1. Is attached.
A reinforcing rib 10 parallel to the longitudinal direction of the girder 1 is provided below the horizontal piece 4 of the tread support member 2.

  Further, the horizontal piece 4 of the tread board support member 2 is provided with a concave notch 11 which opens 8 in the ascending direction of the stairs and fits above the beam 1.

  Hereinafter, the variable angle staircase of this embodiment will be described in more detail. The variable angle staircase of this embodiment comprises a wooden girder 1 and a wooden tread board 3 and a metal tread board support member 2 for attaching the tread board 3 to the girder 1. The tread board support member 2 is generally U-shaped, and comprises a plate-like horizontal piece 4 on which the tread board 3 is mounted, and two vertical pieces 5 that protrude substantially downward from the horizontal piece 4 and are substantially parallel to each other. Yes. The horizontal piece 4 is substantially rectangular and is provided with a substantially rectangular notch 11 that opens in the upward direction of the staircase and substantially matches the width dimension of the beam 1. Further, the vertical piece 5 has a substantially triangular plate shape. The shape of the vertical piece 5 will be described in detail.

  A plurality of reinforcing ribs 10 parallel to the longitudinal direction of the beam are provided below the horizontal piece 4, that is, inside the U-shaped opening 8. Furthermore, the horizontal piece 4 protrudes outward from the vertical piece 5, and tread plate fixing holes 12 for fixing the tread plate 3 are provided at the four corners in the protruding portion. Further, a lower end of the vertical piece 5 in the descending direction of the staircase is provided with a support shaft attachment hole 14 for attaching a bolt 13 that becomes the support shaft 9 and a nail 7 for fixing the rotation of the vertical piece 5. A plurality of mounting holes 6 are provided.

  Further, the beam 1 is provided with support holes 15 for supporting the support shaft 9, and the support holes 15 are provided at regular intervals along the longitudinal direction.

  Subsequently, the construction method of the variable angle staircase of this embodiment will be described with reference to FIG. First, both ends of the elongated girder 1 having a substantially rectangular cross section are cut obliquely in accordance with the gradient of the place where the staircase is to be constructed (FIG. 2 (a)). Next, a plurality of support holes 15 for inserting the support shafts 9 into the processed girders 1 are provided in accordance with the interval between the step plates 3 (FIG. 2B). Subsequently, the girder 1 is sandwiched between the U-shaped opening 8 side of the tread board support member 2, and the position of the support shaft mounting hole 14 of the tread board support member 2 and the position of the support hole 15 of the girder 1 are matched. Here, the bolt 13 through the washer 16 is inserted, and the nut 17 is tightened and temporarily fixed. At this time, the bolt 13 serves as the support shaft 9, and the tread board support member 2 is attached to the beam 1 so as to be rotatable (FIG. 2C). Subsequently, the tread board support member 2 that is rotatably attached is adjusted using a level or the like so that the horizontal piece 4 is horizontal, and a nail 7 is inserted from the attachment hole 6 to rotate the tread board support member 2. After fixing so as not to move, the bolt 13 is also securely fixed. Then, the tread board 3 is mounted and the nail 7 is inserted through the tread board fixing hole 12 from the back side of the horizontal piece 4 of the tread board support member 2 to fix the tread board 3 (FIG. 2 (d)). At this time, the nail 7 used to fix the rotation of the tread board support member 2 or to fix the tread board 3 includes not only the driving nail 7 but also a screwed nail 7 such as a screw. Further, the beam 1 may be processed and shipped at a factory or the like before construction, but can also be processed at a construction site.

Therefore, in the variable angle staircase of this embodiment, the tread board support member 2 includes the horizontal piece 4 on which the tread board 3 is mounted and the vertical piece 5 that is rotatably attached to the beam 1. Can be freely adjusted. Therefore, even if the installation location of the stairs is different, the angle of the tread plate 3 can be adjusted according to various slopes according to the construction location of the stairs, so the same member should be used even if the installation location of the stairs is different. Can do. Further, since a fixing means for fixing the vertical piece 5 so as not to rotate with respect to the girder 1 is provided, after the tread plate 3 is freely rotated with respect to the girder 1 and the angle is adjusted, the tread plate 3 is horizontal. It can be fixed at the right angle according to the correct position.
Further, a fixing hole 6 is provided in the vertical piece 5 of the tread board support member 2 and the nail 7 is inserted into the beam 1 through the mounting hole 6 to fix the vertical piece 5 so as not to rotate with respect to the beam 1. Since it is a means, the tread board support member 2 can be fixed easily. This is particularly easy when the girder 1 is made of wood. In this case, since the nail 7 can be inserted at any position of the girder 1, the angle can be adjusted and fixed steplessly.
Further, the tread board support member 2 is a substantially U-shape comprising a plate-like horizontal piece 4 and two vertical pieces 5 which are plate-like and provided substantially in a suspended manner from the horizontal piece 4. Since the girder 1 is sandwiched on the U-shaped opening 8 side, the tread board support member 2 is sandwiched and fixed from both sides of the girder 1 and can be firmly fixed. Further, since the tread board support member 2 is rotatably attached to the girder 1 through a support shaft 9 provided in the U-shaped opening 8 and extending in the thickness direction of the girder 1, the tread board is supported by the support shaft 9. Not only is the member 2 provided rotatably, but the load applied to the tread plate support member 2, the tread plate 3 and the tread plate 3 is supported by the support shaft 9, and the support shaft 9 is not visible from the outside, so that it looks good.
In addition, since the reinforcing rib 10 parallel to the longitudinal direction of the girder 1 is provided below the horizontal piece 4 of the tread support member 2, the tread support member 2 is prevented from being bent in the up and down direction due to the load applied when the stairs are raised and lowered. The tread board 3 is firmly fixed, and the stairs can be moved up and down safely.

  Further, since the notch 11 is provided in the horizontal piece 4 of the tread support member 2 so as to open in the ascending direction of the stairs and the upper part of the girder 1 can be accommodated, the depth of the tread 3 can be increased and the elevating and lowering is easy. It will be a safe staircase. Moreover, the vertical piece 5 can also be enlarged in the stair ascending / descending direction, and the load applied to the tread board support member 2 can be firmly supported.

FIG. 3 shows a variable angle staircase that is another embodiment corresponding to all of claims 1 to 4 of the present application. In the variable angle staircase of this embodiment, as shown in FIG. 3, the lower portions of the two vertical pieces 5 have an R shape, and a support shaft 9 is installed on each vertical piece 5. That is, in this embodiment, the support shaft 9 is formed integrally with the tread board support member 2. Further, in the thickness direction of the beam 1, a substantially semicircular recess (support hole 15) whose cross section is opened upward is provided as the support hole 15. With the above configuration, in this embodiment, the tread board support member 2 is attached to the girder 1 by fitting the support shaft 9 of the tread board support member 2 into the recess (support hole 15) provided in the girder 1. It is pivotally attached.

Therefore, in the variable angle staircase of this embodiment, the tread board support member 2 can be easily attached to the beam 1 only by fitting the support shaft 9 into the recess (support hole 15). Therefore, compared with the said embodiment, the effort which matches the position of the support shaft attachment hole 14 of the tread board support member 2 and the position of the support hole 15 of the beam 1 can be saved. In addition, about the structure and construction method other than that, it is the same as that of the said embodiment, and there exists the same effect also about an effect.
In the variable angle staircase of the present invention, a pair of girders 1 are provided facing each other, a tread board support member 2 is provided at the same height of each girder 1, and the tread board support member 2 is spanned to attach the tread board 3 Alternatively, the tread board support member 2 may be attached to one girder 1 and the tread board 3 may be attached to the approximate center of one tread board support member 2.

  In the present invention, the tread board 3 is not limited to a flat plate. For example, when a recess having the same width as the beam 1 is provided on the back side of the plate-shaped step board 3, the step board 3 is fitted to the upper portion of the horizontal piece 4 of the beam 1 by the recess provided in the step board 3. It can be attached to the tread board support member 2, and the dimension in the depth direction of the tread board 3 can be further increased. That is, without changing the shape of the tread board support member 2, the tread board 3 can be greatly provided in the depth direction of the girder 1, that is, in the ascending direction of the stairs. Therefore, the stairs are safe and easy to move up and down.

(A) which shows the angle variable staircase which is one Embodiment of this invention is a principal part perspective view, (b) is a principal part disassembled perspective view. (A)-(d) which shows each step of the construction method in the same angle variable staircase is a principal part perspective view. The principal part disassembled perspective view which shows other embodiment of this invention.

Explanation of symbols

1 digit 2 tread support member 3 tread 4 horizontal piece 5 vertical piece 6 mounting hole 7 nail 8 opening 9 support shaft
10 Strengthening rib
11 Notch
12 Tread plate fixing hole
13 volts
14 Support shaft mounting hole
15 Support hole
16 Washer
17 Nut

Claims (4)

In a variable angle staircase in which a plurality of tread plate support members are provided at intervals in the longitudinal direction of the girder and the tread plate is rotatably attached to the girder via the tread plate support member, the horizontal piece on which the tread plate support member mounts the tread plate a digit rotatably Ri Na and a vertical piece is attached, the vertical piece, the upper end of the down stairs direction is a substantially right-angled triangle substantially right, the lower end of the down direction of the stairs of the vertical piece Is provided with a support shaft mounting hole for mounting a bolt as a support shaft, and a plurality of mounting holes for mounting a nail for fixing the rotation of the vertical piece. A variable angle staircase characterized in that it is a fixing means for fixing so as not to move. The treadboard support member is a substantially U-shaped plate composed of a plate-like horizontal piece and two vertical pieces provided in a plate shape and substantially suspended from the horizontal piece, on the opening side of the U-shape of the treadboard support member 2. The angle according to claim 1, wherein a tread plate support member is rotatably attached to the girder via a support shaft provided in the U-shaped opening and extending in the thickness direction of the girder while sandwiching the girder. Variable staircase. Below the horizontal plate of the treadle support member, according to claim 1 or claim 2 Symbol placement variable angle staircase, characterized in that a parallel reinforcing ribs in the longitudinal direction of the girder. The angle variable stairs according to any one of claims 1 to 3, wherein a concave notch that opens in a rising direction of the stairs and fits the upper side of the girder is provided in a horizontal piece of the tread board support member.

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