JP7355581B2 - temporary scaffolding stairs - Google Patents

Description

The present invention relates to temporary scaffolding stairs used for ascending and descending at construction sites.

Conventionally, temporary scaffolding and stairs for temporary scaffolding installed on slopes of construction sites, etc., have been designed so that each tread can be adjusted approximately horizontally, even if the slope of the stairs changes depending on the installation site, and it is possible to adjust the treads to the left and right sides of the stairs. The angle and height of the handrail supports installed on both sides can be adjusted to make it easier for workers to grasp the handrails when going up and down stairs, so that they can go up and down the stairs safely (Patent Document 1, (see 2).

Japanese Patent Application Publication No. 11-22181 Japanese Patent Application Publication No. 2000-145166

However, in the conventional device described above, each footboard can be adjusted horizontally with a single touch, but the angle and height of the handrail support can be adjusted by using bolts, nuts, fixing pins, etc. that fix and support the support. It was necessary to make adjustments while individually tightening and loosening each column, which was cumbersome and required some effort.

In view of the above-mentioned points, it is an object of the present invention to provide a temporary scaffolding staircase that is easy to use and has a handrail that can be easily adjusted and installed according to the slope of the staircase and is easy for a worker to grasp.

In order to solve the above problems, in the temporary scaffolding staircase according to claim 1 of the present invention, a plurality of treads are arranged at predetermined intervals between a pair of parallel inclined members, and both sides of the front end of each of the treads are A staircase main body is pivoted to the inclined member, and a pair of tread link members are pivoted to both sides of the rear end, and a plurality of pillars are pivoted to the lower part of the straight tubular handrail member at predetermined intervals, and each of the above-mentioned It is composed of a handrail that is freely foldable by connecting the middle parts of the pillars with a handrail link material, and the lower end of the pillar of the handrail is fitted into both left and right ends of the upper surface of the tread of the stairway body for fixed support. A cylindrical socket portion is provided, the socket portion is disposed at the rear end of the footboard, and when the footboard is folded, the socket portion is accommodated together with the footboard between the pair of inclined members. .

Further, in the temporary scaffolding staircase according to claim 2 of the present invention, the support of the handrail is bent at the middle part, and the width between each handrail fixedly supported at both left and right ends of the upper surface of the tread is increased from the lower side of the support to the upper part. It is characterized by a configuration in which the sides are wider.

According to the temporary scaffolding staircase according to claim 1 of the present invention, a plurality of columns are pivoted at a predetermined interval to the lower part of a straight pipe-shaped handrail member, and the middle portions of each column are connected with each other with a handrail link material. The stair main body has a handrail that can be connected and folded, and a substantially cylindrical socket portion is provided at both left and right ends of the upper surface of the tread of the stair main body to fit and fixedly support the lower end of the column of the handrail, and the socket portion is connected to the tread. The socket part is arranged at the rear end, and when the tread is folded, the socket part is arranged to fit between the pair of inclined members together with the tread, so that after adjusting the tread of the stair main body supported at an inclination to be approximately horizontal, the handrail can be folded. By folding and inserting the lower end of each pillar so that it faces the socket of the tread, each of the pillars is held substantially vertically, and the handrail member is held substantially parallel to the sloped member of the stair main body, Handrails that are easy for workers to grasp can be adjusted and installed relatively easily depending on the slope of the stairs, making them easy to use.

Further , the socket portion is disposed at the rear end of the tread, and when the tread is folded, the socket portion fits between the pair of inclined members together with the tread, so that when stacking the stair main bodies, the socket portion is arranged between the inclined members. The socket part does not protrude and can be stacked stably and compactly, making it convenient for transportation and storage.

Further, according to the temporary scaffolding staircase according to claim 2 of the present invention, the support of the handrail is bent at the middle part, and the width between each handrail fixedly supported at both left and right ends of the upper surface of the tread is set to the lower side of the support. Since the width is wider on the upper side, the top of the tread can be used widely while supporting the handrail support directly on the top surface of the tread, making it easy for workers to pass through and making it easy to use.

FIG. 1 is a front view of a temporary scaffolding staircase according to the present invention. 2 is a left side view of FIG. 1. FIG. FIG. 2 is an enlarged view of the vicinity of the socket portion in FIG. 1; FIG. 2 is an enlarged view of the vicinity of the angle fixture in FIG. 1; It is a front view of the stair main body in a state where the treads are folded. FIG. 6 is a plan view of FIG. 5; 7 is an enlarged view of the vicinity of the socket portion in FIG. 6. FIG. 7 is an enlarged view of the vicinity of the angle fixture in FIG. 6. FIG. It is a front view of the handrail in an extended state. FIG. 3 is a diagram showing a stacked state of a plurality of stair bodies with treads folded. It is an explanatory view showing a state where a plurality of temporary scaffolding stairs are arranged side by side on the left and right. FIG. 10 is a view corresponding to FIG. 9 in which the middle portion of the handrail support is bent. 13 is a sectional view taken along line AA in FIG. 12. FIG. 13 is a view corresponding to FIG. 2 in which the handrail of FIG. 12 is fixedly supported on the stair body; FIG.

In the temporary scaffolding staircase according to the present invention, a plurality of treads are arranged at predetermined intervals between a pair of parallel inclined members, and both sides of the front end of each of the treads are rotatably attached to the inclined members. On the other hand, there is a staircase body whose rear end sides are rotatably pivoted to a pair of tread link members arranged parallel to the inclined member, and a straight pipe-shaped handrail member which is held by a worker when going up and down. The upper ends of a plurality of columns are rotatably attached to the lower part at predetermined intervals along the longitudinal direction of the column, and the intermediate portions of each column are connected by a handrail link material arranged parallel to the handrail member. It consists of a handrail that can be folded freely.

Furthermore, socket portions are provided at both left and right ends of the upper surface of a predetermined tread of the stair main body, into which the lower ends of the pillars of the handrail are fitted and fixedly supported. The socket part has a substantially cylindrical structure with a diameter slightly larger than the outer diameter of the lower end of the pillar and slightly shorter than the height and width of the sloped member, and the longitudinal direction (pillar insertion direction) of the socket part is Provided perpendicularly to the top surface of the tread.

Preferably, the socket portion is arranged at the rear end of the tread, which is the free end side, and when the tread is folded, the socket portion is accommodated together with the tread between the pair of inclined members. Even when the stair bodies are stacked, the socket portions do not protrude from the sloped members, and they can be stacked stably and compactly, making them convenient for transportation and storage and convenient to use.

More preferably, the support of the handrail is bent into a substantially S-shape at the middle part, and the width between the handrails fixedly supported on both left and right ends of the upper surface of the footplate is wider on the upper side than on the lower side of the support. As a result, the top of the tread can be widely used while directly fixing and supporting the handrail support on the top surface of the tread, making it easy for workers to pass through and making it easy to use.

When installing the temporary scaffolding stairs having the above configuration, first, the stair main body is installed and fixed at an arbitrary inclination angle depending on the installation site. Next, one of the footboards is held by hand and rotated to a horizontal position. At this time, the other footboards are also interlocked by the link members and adjusted to the horizontal state in the same manner as described above.

Then, in this state, the handrail is slightly folded and adjusted so that the lower end of each support column faces the socket part of the upper surface of the tread of the stair body, and then the handrail is fitted and fixedly supported. At this time, each of the pillars is held substantially perpendicular to the tread which has been adjusted to a horizontal state, and the handrail member pivoted to the upper end of each of the pillars is an inclined member of the stair body installed at an arbitrary angle. is held approximately parallel to the

As described above, according to the temporary scaffolding staircase of the present invention, by rotating and adjusting the treads of the stairs installed at an inclination to a substantially horizontal position, the handrails fixedly supported on the base of the treads can also be adjusted according to the slope of the stairs. It can be adjusted and installed in an appropriate state that is easy to grip, and the work is relatively easy and convenient.

In addition, since the handrail supports are supported and fixed inward from both the left and right edges of the tread, the worker remains on the upper side of the tread even when installing or dismantling the handrail (with his/her body on the outside of the sloped material). In addition to allowing workers to work more safely (without having to step on the footboard), it is also expected to have the effect of preventing unforeseen situations such as a worker accidentally stepping off the left and right ends of the footboard while climbing or descending.

An embodiment of the present invention will be described below based on FIGS. 1 to 11.

1 in the figure is a temporary scaffolding staircase according to the present invention, which is composed of a staircase main body 3 equipped with locking fittings 2 for locking the stairs at both ends, and a handrail 4 that is held by a worker while going up and down. are doing. The stair main body 3 includes a pair of slope members 5 made of aluminum molded material having a substantially U-shaped cross section and arranged in parallel at a predetermined interval, and a plurality of slope members 5 having a predetermined thickness between the pair of slope members 5. Stepboards 6 are arranged at predetermined intervals along the longitudinal direction of the inclined member 5.

Further, a shaft body 7 protruding from both sides of the front end of each of the footboards 6 is fitted into a through hole drilled in a side surface of the inclined member 5 and rotatably attached thereto. Further, in the gap between the sloped members 5 and the footboards 6, a pair of footboard link members 8 are disposed in parallel and at an interval slightly narrower than the width between the pair of sloped members 5. A shaft body 9 protruding from both sides of the rear end is fitted into a through hole drilled in the side surface of the tread plate link material 8 and is rotatably attached to the tread plate link material 8, so that the inclination angle of any one of the tread plates 6 can be adjusted. When the adjustment is made, the inclination angles of all the footboards 6 are adjusted accordingly.

Further, on the side surface of the inclined member 5, an angle fixing device 10 for fixing each of the footboards 6 to the inclined member 5 at an arbitrary angular position is disposed. The angle fixing device 10 has a long hole 11 bored in the side surface of the inclined member 5 along its longitudinal direction, and an angle fixing member 12 is arranged between the long hole 11 and the tread link material 8. At the same time, one end of the angle fixing member 12 is rotatably attached to a predetermined position of the footboard link member 8, while the other end is a fixing member slidably inserted along the elongated hole 11. They are screwed onto bolts 13, and each footboard 6 can be fixed at any inclination angle by tightening or loosening the fixing bolts 13.

Reference numeral 14 in the figure is a stopper that restricts the sliding of the fixing bolt 13 in the elongated hole 11, and its base end is rotatably attached to a shaft body 15 provided near the elongated hole 11. When the free end portion rotates under its own weight and comes into contact with the flange portion 5a of the inclined member 5, as shown in FIG. It is configured to remain at a position intersecting the elongated hole 11. As a result, when adjusting the angle of the tread plate 6 or folding the tread plate 6, when the worker loosens the fixing bolt 13, the tread plate 6 is accidentally folded all at once, and the slope member 5 and the tread plate are folded together. This is designed to prevent fingers or the like from getting caught between the link material 8 and the link material 8.

Further, as shown in FIG. 9, the handrail 4 has a plurality of support pieces 17 fixed at predetermined intervals along the longitudinal direction to the lower part of a straight pipe-shaped handrail member 16 that is held by the worker while going up and down. The upper ends of a pair of columns 18 having the same length are rotatably attached to the support pieces 17 at both ends, and the intermediate portions of the columns 18 are arranged parallel to the handrail member 16. They are connected by a handrail link material 19 and configured to be foldable. In addition, intermediate portions of the respective handrail link members 19 are connected and reinforced by short intermediate supports 20 disposed parallel to the support posts 18. In addition, by connecting a plurality of handrail link members 19 near the approximate middle portion of each support 18 as in this embodiment, the gap between the handrail member 16 and each footboard 6 can be reduced, which is more suitable in terms of work safety. Become something.

Further, on the rear end side (the free end side of the tread plate 6) of the left and right ends of the upper surface of the predetermined (top and bottom tread plate in this embodiment) tread plate 6 provided in the stair body 3, the handrail 4 is provided. A socket portion 21 is provided into which the lower end of each support column 18 is fitted and fixedly supported. The socket part 21 has a substantially cylindrical structure with a diameter slightly larger than the outer diameter of the lower end of the support 18 and slightly shorter than the height and width of the slope member 5, and (insertion direction) is provided in a direction perpendicular to the upper surface of the footboard 6. Further, as shown in FIG. 7, the bottom of the socket portion 21 is provided with a support pin 22 that supports the lower end portion of the fitted column 18.

Further, the side surface of the socket portion 21 facing the free end side (the front side in FIG. 2) of the footboard 6 is provided with a tightening bolt 23 for tightening and fixing the lower end portion of the fitted column 18 from the side. There is. This allows the operator to tighten or loosen the tightening bolt 23 of the socket portion 21 of the upper step board 6 while remaining on the upper side of the step board 6 (without leaning outside the inclined member 5). .

Although the socket portion 21 can be placed on the front end side of the footboard 6 (on the proximal end side of the footboard 6), as in this embodiment, by placing it on the rear end side of the footboard 6, When the tread board 6 is folded, the socket part 21 can be accommodated together with the tread board 6 between the pair of inclined members 5, thereby making the plurality of stair main bodies 3 stable and compact, as shown in FIG. They can be stacked on top of each other, making them convenient for transportation and storage.

Next, a procedure for installing the temporary scaffolding stairs 1 will be explained.

First, the locking metal fittings 2 at both ends of the staircase main body 3 are respectively locked to a pair of horizontal members A1 and A2, such as a single pipe, which are provided with a predetermined step on a temporary scaffold or a slope at a construction site. Install at an angle. Next, after loosening the fixing bolt 13 disposed on the side surface of the inclined member 5 so that the fixing bolt 13 can freely slide along the elongated hole 11 (the footboard 6 can freely rotate), Pick up one of the footboards 6 and adjust its rotation so that it is in a horizontal position. At this time, since each of the footboards 6 is connected by the footboard link material 8, the other footboards 6 are also rotated in conjunction with each other and are uniformly adjusted to a horizontal state. When the step board 6 has been adjusted to a horizontal state, the fixing bolt 13 is tightened and fixed, and the installation of the stair main body 3 is completed.

Next, the handrail 4 in the extended state as shown in FIG. 9 is slightly folded as shown in FIG. 1 to narrow the distance between the respective supports 18, and the handrail 4 is placed on a predetermined tread 6 of the stair main body 3 installed at an angle. The spacing between the sockets 21 is adjusted to match the spacing between the sockets 21 provided in the Then, in this state, lift the handrail 4 above the stair main body 3 so that the lower end of each post 18 of the handrail 4 faces the socket part 21 of the tread 6, and then lower the handrail 4 to fit it in and tighten it. Installation of the handrail 4 is completed by sequentially fixing and supporting it with bolts 23. At this time, the operator can fit each support column 18 of the handrail 4 into the socket part 21 and fixedly support it while remaining on the upper side of the footboard 6 (without leaning outside the inclined member 5).

Since each support column 18 of the handrail 4 is fixedly supported based on each tread 6 which is rotatably adjusted approximately horizontally, as shown in FIG. At the same time, the handrail member 16, which is pivoted to the upper end of each support column 18, is held approximately parallel to the inclined member 5, so that the handrail member 16 is adjusted to an appropriate state that is stable and easy to grip for the worker while ascending and descending. The installation process is relatively simple and easy to use. Furthermore, since the handrail 4 is foldable, even if it becomes necessary to adjust the slope of the stair main body 3 to some extent after the stair main body 3 has been installed on an incline, the stair main body 3 can be left in the installed state without removing the handrail 4. You can also adjust the slope.

In the above embodiment, the handrail 4 has two columns 18, and the socket portions 21 for fixing and supporting the lower ends of the columns 18 are provided only on the top and bottom treads 6 of the stair main body 3. However, the invention is not necessarily limited to this. For example, the number of columns 18 may be the same as the number of steps of the treads 6 of the stair main body 3, and the socket portions 21 may be arranged on all the treads 6. In this case, the strength of the handrail 4 can be expected to be improved by increasing the number of columns 18.

In addition, although the above embodiment has been described assuming that the temporary scaffolding staircase 1 is installed alone, the socket part 21 that fixedly supports the lower end of the column 18 of the handrail 4 is arranged between the pair of inclined members 5. Therefore, for example, even if a plurality of stair main bodies 3 are arranged side by side, the socket parts 21 of each stair main body 3 will not interfere with each other and can be arranged without leaving any gaps. As a result, as shown in FIG. It is also possible to construct stairs that are easy to use.

Further, in FIGS. 12 to 14, each support column 18' of the handrail 4' is bent into a substantially S-shape at its intermediate portion (lower part of the connecting portion with the lower handrail link material 19), and the upper surface of the footboard 6 is bent. 18 is a diagram showing another embodiment in which the width between the handrails 4' fixedly supported at both left and right ends of the column is wider on the upper side than on the lower side of the column 18'. FIG. According to this, as shown in FIG. 14, while the support column 18' of the handrail 4' is directly fixedly supported on the upper surface of the footboard 6, the top of the footboard 6 can be widely used, and it is easy for workers to pass through. This makes it even more user-friendly, as it allows workers to pass each other.

TECHNICAL FIELD The present invention relates to a temporary scaffolding staircase whose treads can be adjusted horizontally regardless of the slope of the staircase, and in particular can be widely used in temporary scaffolding stairs having handrails.

1... Stairs for temporary scaffolding 3... Stair body 4, 4'... Handrail 5... Inclined material 6... Tread board 8... Link material for tread board 10... Angle fixture 16... Handrail member 18, 18'... Support 19... Link material for handrail 21...Socket part

Claims (2)

A plurality of treads are arranged at predetermined intervals between a pair of parallel sloped members, both sides of the front end of each of the treads are pivoted to the sloped members, and both sides of the rear end are pivoted to a pair of links for the treads. A stairway body consisting of a staircase body, and a handrail that is freely foldable by having a plurality of pillars pivoted at a predetermined interval to the lower part of a straight handrail member, and connecting the intermediate parts of each of the pillars with a handrail link material. a substantially cylindrical socket portion is disposed at both left and right ends of the upper surface of the tread of the stair main body, and the lower end of the column of the handrail is fitted into and fixedly supported , and the socket portion is disposed at the rear end of the tread; A staircase for temporary scaffolding, characterized in that when the tread is folded, the socket part is accommodated together with the tread between the pair of inclined members . Claim 1 characterized in that the pillars of the handrail are bent at an intermediate portion, and the width between the handrails fixedly supported on both left and right ends of the upper surface of the footboard is wider on the upper side than on the lower side of the pillars. Stairs for temporary scaffolding as described.

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