JP3013338B2 - Temporary scaffold stairs - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a staircase for a temporary scaffold used for elevating and lowering a construction site, and more particularly to a staircase capable of changing its inclination.

[0002]

2. Description of the Related Art A temporary scaffold stair is generally formed by fixing a plurality of treads to a pair of parallel inclined members at a predetermined angle by welding. The stairs are assembled between temporary scaffolds around a building. It forms a hoistway. However, in the stairs in which the treads are fixed at a predetermined angle, the stairs do not become horizontal if the gradient of the stairs changes.
No. 003, a plurality of treads are pivotally mounted between a pair of parallel inclined supports, and each tread is connected to a pair of link members by a connecting member, and the angles of the treads are linked. There has been proposed one that can be changed freely. In this step, the lower end of the inclined member and the link member are connected by a base plate, and the angle of the tread plate is set to the angle of the base plate by bringing the base plate into close contact with the ground or the like.

[0003]

However, in the above-mentioned conventional stairs for temporary scaffolding, the stairs can be adjusted almost in parallel with the ground or the like simply by bringing the base plate into close contact with the ground or the like, and the stairs are installed on a horizontal support portion. Although sometimes convenient, there is a problem in that when the ground or floor is inclined, the tread plate is also inclined.

[0004] Further, although the footboard can be folded down to make it compact, when the footboard is folded, the link material overlaps with the inclined support, and furthermore, the end of the folded footboard or base plate is bent by the link material or the slope. If multiple stairs are to be stacked during transportation and storage to protrude from the support, stable stacking cannot be performed due to the effects of the tread and base plate edges and link materials, making transport and storage difficult. Has problems.

[0005] In view of the above, the present invention can always adjust the tread plate horizontally without being affected by the ups and downs of the ground or floor of the installation place, and can fold the tread plate during transportation and storage to make it compact. It is another object of the present invention to provide a temporary scaffold stair that can be easily stacked.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention solves the above-mentioned problem by pivotally pivoting the front end both sides of a plurality of tread plates between a pair of parallel inclined columns having locking metal fittings at both ends. At the same time, the rear end sides of the tread plate are rotatably mounted on a pair of link members that are arranged slightly parallel to and slightly smaller than the width between the inclined columns, and the height of the link members is equal to the height of the inclined columns. It is characterized in that an angle fixing device for fixing the tread plate at an arbitrary angle position with respect to the inclined column is provided while the length is shorter than the width and can be stored in the inclined column.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION In a staircase for a temporary scaffold according to the present invention, when a staircase is used at a construction site, a horizontal member such as a pipe or the like is provided with a locking metal fitting at an upper end portion of an inclined column. In addition to the above, the lower end of the metal fitting is locked with a horizontal member such as a pipe located below, or placed directly on a plate laid on the ground or the like. In this state, the treads and the link material can be moved freely,
Hold one of the treads by hand, rotate it horizontally, and fix it with the angle fixing device. In this way, if one of the treads is rotated and adjusted after the stairs are installed, the angles of all the treads can be adjusted in conjunction with this, so that the treads are not affected by the undulating condition of the ground, floor, etc. Can always be adjusted horizontally.

[0008] Further, since the locking fittings are fixed to both ends of the stairs, the stairs can be easily installed anywhere by locking the locking fittings at both ends to a horizontal member such as a pipe which is appropriately installed at a construction site. In addition, it is possible to install two or more stairs continuously by combining with a horizontal member such as a pipe, and it is possible to cope with ascending and descending to a high place.

Further, when the tread plate is folded, the tread plate and the link member can be accommodated inside the inclined column,
Since the treads and link members do not protrude in the height and width directions of the inclined columns, they are compact and easy to carry, and can be stably stacked without obstacles when stacking stairs.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

Reference numeral 1 in the figure denotes a temporary scaffold staircase according to the present invention, which is made of a wide aluminum molding material having a substantially U-shaped cross section to which locking metal members 2 for locking the staircase 1 are fixed at both ends. A pair of inclined columns 3 are arranged in parallel at a predetermined interval, and a step plate 4 having a predetermined thickness is arranged between the pair of inclined columns 3 at a predetermined interval along the longitudinal direction of the inclined columns 3.
The shaft 5 protruding from both sides of the front end of the tread plate 4 is
Is fitted into a through hole formed in the side surface of the shaft and is rotatably mounted on the shaft.

Further, a pair of link members 6 are arranged in parallel with each other slightly narrower than the width between the inclined columns 3, and shaft members 7 projecting from both sides of the rear end of the tread plate 4 are formed on the side surfaces of the link members 6. When the one of the step plates 4 is rotated, all the step plates 4 are rotated in conjunction with each other via the link member 6 when the one of the step plates 4 is rotated. The height of the link member 6 is shorter than the height of the inclined column 3, that is, the link member 6 is made thinner than the inclined column 3, and the step plate 4 is folded so that the axis of the step plate 4 and the inclined column 3 are aligned. When the angle with the direction is reduced, both the tread plate 4 and the link member 6 are accommodated between the pair of inclined columns 3 as shown in FIG.

An angle fixing device for fixing the tread plate 4 at an arbitrary angle position with respect to the inclined column 3 is provided. As an example of the angle fixing device, a side surface of the inclined column 3 is arranged along the longitudinal direction. A bolt fixing plate 9 in which a long hole 8 is formed and a round through hole is formed at predetermined intervals in a long hole having the same shape as the long hole 8 is inserted into the long hole 8.
The large diameter portion 11 of the fastening bolt 10
The angle fixing member 13 is disposed between the elongated hole 8 and the link member 6, and one end of the angle fixing member 13 is placed at a predetermined position of the link member 6. And the other end is screwed to the nut 15 fixed to the angle fixing member 13 with the other end inserted into the elongated hole 8, and tightened and loosened by the fastening bolt 10. The step board 4 can be adjusted to an arbitrary angle.

Next, a procedure for installing the temporary scaffold stairs will be described.

First, the locking fitting 2 on the upper end side of the inclined column 3 of the stairs 1 is locked to, for example, a horizontal member of a scaffolding frame installed on an upper level, and the locking fitting 2 on the lower end side of the inclined column 3 is provided. Is locked to the horizontal member of the scaffold frame installed below. At this time, when installing on the ground, it is also possible to lay a floor plate or the like, and directly mount the locking fitting 2 thereon.

When the locking of the inclined column 3 is completed, the fastening bolt 10 provided on the side surface of the inclined column 3 is loosened, and the large-diameter portion 11 of the bolt is formed by the recess 12 formed by the elongated hole 8 and the bolt fixing plate 9. The fastening bolt 10 is removed and the long hole 8
To be slidable along.

Next, one of the tread plates 4 is turned so as to be horizontal with the hand. When one of the treads 4 is turned horizontally, the other treads 4 connected by the link members 6 also become horizontal. At this time, the angle fixing member 13 connected to the link member 6 also moves together, and the fastening bolt 10 for fixing the angle fixing member 13 also slides along the long hole 8.

When the tread plate 4 is horizontal, the fastening bolt 1
After the large-diameter portion 11 is fitted into the recess 12 formed by the elongated hole 8 and the bolt fixing plate 9, the fastening bolt 10 is tightened to fix the angle fixing member 13, and the installation of the stairs 1 is completed.

Thus, the temporary scaffold stairs of the present invention
Since the angle of the tread plate 4 is adjusted after the inclined support 3 is hooked at a predetermined place, the tread plate 4 can always be adjusted horizontally without being affected by the ups and downs of the ground or floor supporting the stairs 1.

Further, since the locking fittings 2 are fixed to both ends of the stairs 1, the locking fittings 2 at both ends are fixed to a horizontal member such as a pipe which is appropriately installed at a construction site, so that the stairs can be set anywhere. Can be easily installed, and two or more stairs can be installed continuously to form a long staircase by combining with a horizontal member such as a pipe, so that it is possible to cope with ascending and descending to a high place.

Next, when the stairs 1 are transported or stored, the fastening bolts 10 on the side surfaces of the inclined columns 3 are loosened so that the large-diameter portions 11 of the bolts are detached from the recesses 12 of the bolt fixing plate 9. Is slidable along the elongated hole 8.

When the tread plate 4 is folded, the link member 6 is located inside the inclined struts 3 and its height is shorter than that of the inclined struts 3, so that as shown in FIG. In addition, the link member 6 can be stored between the inclined columns 3, and the appearance from the front is a compact one including only the inclined columns 3.

When the tread plate 4 and the link member 6 are stored between the inclined columns 3, the large-diameter portion 11 of the fastening bolt 10 is fitted into the recess 12 of the bolt fixing plate 9, and then the fastening bolt 10 is tightened to tighten the tread plate 4 and the link plate 6. The link member 6 is fixed.

When carrying the stairs 1, two people can easily carry them by hanging both ends of one of the inclined columns 3 and also stacking a plurality of stairs 1 at the time of carrying or storing. Sometimes lay stairs 1
There is no obstruction on the inclined support column 3 and the stairs can be stably piled up one after another.

The angle fixing device of the above embodiment can quickly and surely adjust and fix the angle of the tread plate 4, but the angle fixing device is not limited to the above embodiment, and other methods can be used. Needless to say, it may be adopted and fixed.

[0026]

As described above, according to the temporary scaffolding stairs according to the present invention, the front end sides of the plurality of tread plates are rotatably pivoted between a pair of parallel inclined supports having locking metal fittings fixed at both ends. At the same time, the rear end sides of the tread plate are rotatably mounted on a pair of link members that are arranged slightly parallel to and slightly smaller than the width between the inclined columns, and the height of the link members is equal to the height of the inclined columns. It is shorter than the width and can be stored in the inclined column, while the angle fixing device that fixes the tread plate at an arbitrary angle position with respect to the inclined column is arranged, so it affects the unevenness of the ground and floor surface etc. The tread can always be adjusted horizontally without being performed.
In addition, stairs can be easily installed anywhere by hooking on horizontal members such as pipes that are appropriately installed at the construction site by the metal fittings at both ends of the stairs, and two or more stairs can be installed continuously. It is possible and can correspond to the ascent and descent to a high place. Furthermore, when the step board is folded, the step board and the link member can be stored between the inclined columns, which makes transport and storage very easy.

[Brief description of the drawings]

FIG. 1 is a front view of a temporary scaffold staircase according to the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is an enlarged view of a main part of FIG. 1 with a part cut away.

FIG. 4 is a partially cutaway view of FIG.

FIG. 5 is a diagram showing a state in which a step board is stored in an inclined support.

[Description of sign]

DESCRIPTION OF SYMBOLS 1 ... Stairs 2 ... Locking bracket 3 ... Inclined support 4 ... Tread plate 6 ... Link material 8 ... Long hole 9 ... Bolt fixing plate 10 ... Fastening bolt 11 ... Bolt large diameter part 12 ... Depression 13 ... Angle fixing material

Continuation of the front page (56) References JP-A 52-83517 (JP, U) JP-A 56-10873 (JP, Y2) (58) Fields investigated (Int. Cl. ⁷ , DB name) E04G 1 / 26 E04G 1/30 E06C 1/00-9/14

Claims (1)

(57) [Claims] 1. A front end of each of a plurality of tread plates is rotatably mounted between a pair of parallel inclined struts having locking members fixed to both ends, and both rear end portions of a tread plate are connected between the inclined struts. A pair of link members, which are slightly smaller than the width, are rotatably mounted on a pair of link members, and the height of the link members is shorter than the height of the inclined columns so that they can be stored in the inclined columns. A stair for a temporary scaffold, wherein an angle fixing device for fixing a tread plate at an arbitrary angle position with respect to an inclined support is arranged.