JP7142469B2 - Footboard device for scaffolding for circular frame - Google Patents

Description

TECHNICAL FIELD The present invention relates to a scaffold tread device for a circular frame in a horizontal state with respect to horizontal rods of a building frame that are spaced apart in a circle so as to correspond to the circular frame.

2. Description of the Related Art Conventionally, when forming scaffolding for construction of a building, it is known to erect scaffolding treads in a horizontal state between respective construction frames facing each other with a required number of intervals. However, for a circular frame in plan view such as a cylindrical building, a standard frame in which a pair of standard gate-shaped building frames are connected by cross bracing and footboards are placed on the horizontal pipes of the building frame Inconvenience such as gaps occurring between scaffoldings occurs.
In order to solve this problem, the Applicant (Prior Art) filed a tread device with a unique configuration that connects between the standard framework scaffolds.

Japanese Patent Application Laid-Open No. 9-4217

The above technology solves the conventional problems, but due to the arrangement of the treads, the treads without grips are placed on the treads of the standard frame scaffolding. In order to prevent this, it was necessary to fix the step board and the tread board with a wire or the like. (See (0011), etc.)

In addition, in order to correspond to the circular frame, a footboard device that connects a specially structured footboard such as a trapezoidal shape with a short side on the inside of the frame in the gap between the scaffolds erected on the building frame is also envisioned. However, there is a problem with the production cost of the treads that exhibit a special structure.

SUMMARY OF THE INVENTION The present invention has been devised in view of the above-mentioned problems, and provides an economical tread device that does not require fixing work to prevent it from falling off due to blowing up and that utilizes an existing tread structure. is.

The present invention, as described in claim 1,
In a stepping device for a scaffolding for a circular frame, in which a stepping plate for a scaffolding is erected in a horizontal state on a horizontal rod of a building frame that is spaced apart in a circular shape,
a first tread plate having a rectangular tread plate main body and a step plate having C-shaped cross-sectional installation grip fittings protruding from both sides of an end face;
Consists of a rectangular tread plate body and a second tread plate continuously provided with a step plate having gripping ribs for installation on both sides of the end face,
The step plate of the second tread plate is placed on the horizontal rod of the construction frame, and the first tread plate is placed on the second tread plate so that the erection grips are placed on the construction frame. It is characterized in that it is arranged in a state of being engaged with the horizontal rod of the

According to the second aspect of the present invention, there is provided a scaffolding footboard device for a circular frame, in which scaffolding footboards are installed in a horizontal state on horizontal rods of a building frame spaced apart in a circular shape,
a first tread plate having a rectangular tread plate main body and a step plate having C-shaped cross-sectional installation grip fittings protruding from both sides of an end face;
a second tread plate having a rectangular tread plate main body and a step plate protruding from both sides of an end surface of the tread plate;
A third tread plate comprising a rectangular tread plate main body and a step plate having a notch formed in one corner of the end face and a step plate protruding from both sides of the end face with gripping ribs for installation,
The second tread and the third tread are connected in a state where the long side of the second tread and the side of the third tread where the notch is formed are in contact, and the second and third tread are connected. The step board is placed on the horizontal rod of the frame, the first step board is placed on the second step board and the third step board, and the erection grips are placed on the frame. It is characterized by being arranged in a state of being engaged with a horizontal rod.

According to the third aspect of the present invention, there is provided a treadboard device for a scaffold for a circular frame as set forth in the second aspect, wherein the second tread plate is provided with a slip prevention fitting for connecting the second tread plate and the third tread plate. It is characterized by

Since the present invention adopts the configurations as described in claims 1 to 3 , it is possible to arrange the treads provided with the grip fittings as a mechanism for preventing falling off due to blowing up from the upper part of the adjacent treads. It is possible to provide an economical tread board device that does not require fixing work to prevent it from coming off and utilizes an existing tread board structure.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory perspective view showing an embodiment of a scaffolding footboard device for a circular frame according to the present invention; 1 is a perspective view of a first footboard in a footboard device for a scaffold for a circular frame according to the present invention; FIG. FIG. 4 is a perspective view of a second tread plate in the tread plate device for a scaffold for a circular frame according to the present invention; FIG. 10 is a perspective view of a third tread plate in the tread plate device for a scaffold for a circular frame according to the present invention; 1 is a plan view of a first footboard in a footboard device for a scaffold for a circular frame according to the present invention; FIG. FIG. 2 is a side view of a first tread in the tread plate device for a scaffold for a circular frame according to the present invention; FIG. 4 is a plan view of a second tread plate in the tread plate device for a scaffold for a circular frame according to the present invention; FIG. 3 is a side view of a second footboard in the footboard device for a scaffold for a circular frame according to the present invention; FIG. 3 is a plan view of a third tread in the scaffolding tread device for a circular frame according to the present invention; FIG. 3 is a side view of a third tread plate in the tread plate device for a scaffold for a circular frame according to the present invention; BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view showing an embodiment of a scaffolding footboard device for a circular frame according to the present invention;

Hereinafter, a step board device for a scaffold for a circular skeleton according to the present invention will be described in detail.

The basic configuration of the present invention consists of a first tread and a second tread in claim 1, and a first tread, a second tread and a third tread in claims 2 and 3. The present invention relates to a footboard device for a circular frame for arranging each of these footboards on the horizontal rods of the frame that are spaced apart from each other on the circular frame.

The first footboard 1 has a rectangular overall shape in plan view, and comprises a footboard body 1a and step plates 1b connected to both ends of the short side of the footboard body 1a.

As shown in the figure, the tread plate body 1a is formed in a rectangular shape in a plan view, and the step plate 1b is connected so that the long side portions of the step plate 1b are in contact with the short side portions of the tread plate body 1a.

On both sides of the end surface of the step plate 1b (that is, at the four corners of the first step plate when connected to the step plate body), erection grips K1 to K4 projecting in the longitudinal direction are provided.

The gripping fittings K1 to K4 are formed in a cross-sectional shape C so as to engage with the horizontal rods P of the construction frame.

The step plate 1b is made of a thinner plate than the step plate main body 1a. This is because, as will be described later, the first footboard is placed above the second and third footboards and placed over the horizontal rod, so that the grips can be securely engaged.

The second footboard 2 has a rectangular overall shape in a plan view, and is composed of a footboard body 2a and a step board 2b connected to the footboard body 2a.

As shown in the drawing, the tread plate body 2a is formed in a rectangular shape in a plan view, and the step plate 2b is connected with the long side portions of the step plate 2b in contact with the short side portions of the tread plate body 2a.

The step plate 2b is made of a thinner plate than the step plate body 2a. For example, the step plate has a thickness of about 18 mm compared to the thickness of the step plate body of about 50 mm. Such a configuration is to eliminate the step between the frames, as shown in the above-mentioned known technology.

At both ends of the step plate 2b (that is, at the four corners of the second step plate 2 when connected to the step plate body 2a), erection gripping ribs F1 to F4 projecting in the longitudinal direction are provided. The gripping ribs are formed, for example, in the shape of hook pieces that are vertically provided downward when placed on the horizontal rod P. As shown in FIG.
Such a grip rib makes it possible to prevent the second tread plate arranged on the horizontal rod from falling even when it skids.

That is, the second tread does not need to have a C-shaped grip like the first tread. This is because, as will be described later, since the second tread is arranged under the first tread, there is no need to provide a drop-off prevention mechanism due to blow-up. As a result, the member manufacturing cost is significantly reduced.

The overall shape of the third footboard 3 is formed in a substantially convex hexagonal shape in a plan view, and is composed of a footboard body 3a and a step board 3b connected to the footboard body 3a.

As shown in the figure, the tread plate main body 3a is formed in a rectangular shape in a plan view. It abuts on the short side and is continuously installed.

The step plate 3b is made of a thinner plate than the step plate main body 3a. For example, the step plate has a thickness of about 18 mm while the step plate main body has a thickness of about 50 mm. Such a configuration is to eliminate the step between the frames, as shown in the above-mentioned known technology.

The step plate 3b of the third step plate 3 has a notch portion H formed at one corner of the end face.

As in the embodiment, a rectangular notch in plan view is assumed, and the mode in which the step plate main body and the step plate are continuously provided (the entire third step plate) has a convex hexagonal shape in plan view.

On both ends of the step plate, gripping ribs F5 to F8 for installation are provided to protrude in the longitudinal direction. The gripping ribs are formed, for example, in the shape of hook pieces that are vertically provided downward when placed on the horizontal rod P. As shown in FIG.
Such a grip rib makes it possible to prevent the third footboard placed on the horizontal rod from falling even when it skids.

That is, the third step does not need to be formed with a C-shaped grip like the first step. This is because, as will be described later, since the third footboard is arranged under the first footboard, there is no need to provide a drop-off prevention mechanism due to blow-up.
As a result, the member production cost is reduced.

The arrangement relationship described in claim 1 will be described below.
The step plate on which the erection grip ribs of the second tread are protruded is placed on the horizontal rod of the construction frame, and the first tread is placed from above the second tread to perform the erection. The gripping metal fittings for the construction are arranged in a state of being engaged with the horizontal rods of the construction frame.
In addition, in the treadboard device for a scaffold for a circular skeleton according to the present invention, since the first treadplate is arranged at a certain angle with respect to the second treadplate as shown in the figure, the grip fittings of the first treadplate are aligned with the horizontal rod. To ensure positive engagement, the spacing of the grapples (eg K1 and K3) of the first tread is designed to be a dimension longer than the diagonal of the step plate of the second tread.

As described above, since the first tread plate with the grip fittings is placed on top of the second tread plate, it is possible to avoid the need for conventional wire fixing work to prevent the tread from falling off due to wind up. becomes.

Next, the arrangement relationship described in claim 2 will be described below.

The second tread and the third tread are connected when they are arranged on the horizontal rod of the building frame.

As shown in the figure, one long side of the second footboard and the side of the third footboard on which the notch is formed are connected in contact with each other.

Various forms of the connecting member are conceivable, but for example, a plurality of tongue-like connecting metal fittings are provided on one long side of the second tread, and the connecting metal fitting is inserted into one long side of the third tread. Therefore, it is possible to prevent mutual deviation.

By connecting the second and third treads in the manner described above, the overall shape of the second and third treads connected has a rectangular notch at approximately the center of both short sides. will be formed.

By adopting such a configuration, it is possible to secure a space for engaging the grip fitting provided on the first footboard with the horizontal rod.

For example, when two first footboards 1X1Y are arranged side by side as shown in FIG. The gripping fittings K1X and K2X of the first footboard 1X arranged outside the frame engage the horizontal rod P from the outside of the second footboard 2, and the gripping fittings K3X and K4X of the first footboard 1X and the first footboard 1Y are engaged. are engaged with the horizontal rod P through the space formed between the second tread 2 and the third tread 3, and the grips K3Y and K4Y of the first tread 1Y are engaged with the third tread 3 will be engaged with the horizontal rod P from the inside.

As described above, the first tread plate with the grip fittings is placed on top of the second tread plate and the third tread plate. It becomes possible to

1 First tread 2 Second tread 3 Third tread P Horizontal rod

Claims (3)

In a stepping device for a scaffolding for a circular frame, in which a stepping plate for a scaffolding is erected in a horizontal state on a horizontal rod of a building frame that is spaced apart in a circular shape,
a first tread plate having a rectangular tread plate main body and a step plate having C-shaped cross-sectional installation grip fittings protruding from both sides of an end face;
Consists of a rectangular tread plate body and a second tread plate continuously provided with a step plate having gripping ribs for installation on both sides of the end face,
The step plate of the second tread plate is placed on the horizontal rod of the construction frame, and the first tread plate is placed on the second tread plate so that the erection grips are placed on the construction frame. A footboard device for scaffolding for a circular frame, characterized in that it is arranged in a state of being engaged with a horizontal rod of a circular frame. In a stepping device for a scaffolding for a circular frame, in which a stepping plate for a scaffolding is erected in a horizontal state on a horizontal rod of a building frame that is spaced apart in a circular shape,
a first tread plate having a rectangular tread plate main body and a step plate having C-shaped cross-sectional installation grip fittings protruding from both sides of an end face;
a second tread plate having a rectangular tread plate main body and a step plate protruding from both sides of an end surface of the tread plate;
A third tread plate comprising a rectangular tread plate body and a step plate having a notch formed in one corner of the end face and a step plate protruding from both sides of the end face with gripping ribs for installation,
The second tread and the third tread are connected in a state where the long side of the second tread and the side of the third tread where the notch is formed are in contact, and the second and third tread are connected. The step board is placed on the horizontal rod of the frame, the first step board is placed on the second step board and the third step board, and the erection grips are placed on the frame. A footboard device for a scaffold for a circular frame, characterized by being arranged in a state of being engaged with a horizontal rod. 3. The treadle device for a scaffold for a circular frame according to claim 2, wherein the second treadplate is provided with an anti-slip fitting for connecting the second treadplate and the third treadplate.

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