JPH0816396B2 - Formwork for 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 form, and more particularly to a staircase formwork into which cement paste kneaded into a paste is poured when constructing a concrete staircase.

[0002]

2. Description of the Related Art Conventionally, in concrete stairs, a concrete frame (hereinafter sometimes referred to as a control panel) is used to assemble a stair formwork on a construction surface for constructing the stairs, and then cement paste which is kneaded into a paste is used. It is formed by a series of procedures in which the mold is poured into the mold, and after the poured cement is solidified, the mold is removed.

[0003]

Conventionally, it is necessary to assemble a mold with a control panel for each concrete staircase to be constructed. The work of assembling such a formwork depends on the scale of the stairs to be formed, but usually requires a formworker of four people for about two days. But like recently,
In the state where civil engineers, especially formworkers, are short, the formwork making process is becoming the rate-determining process of stair construction, and the period of the formwork making process greatly affects the delivery date of staircase construction. Further, in the conventional construction method, it is necessary to create substantially the same formwork for each staircase even when constructing a plurality of staircases having substantially the same staircase dimensions such as inclination angle and step width. It is necessary to set the process of. Also, in winter etc.
Is a heating device to prevent freezing of concrete
The concrete is heat-recovered and cured using
According to the law, in this case as well, a heating appliance is installed at each step of the stairs.
It was necessary to do so, and efficiency was poor. Therefore,
An object of the present invention is that, when constructing a plurality of concrete stairs, the concrete stairs can be reused and the process of forming a form can be substantially unnecessary, and the concrete can be constructed in winter or the like.
It is to provide a formwork for stairs that can be easily kept warm .

[0004]

[Means for Solving the Problems ]
Therefore, the present invention has the following configuration. That is, the present invention, when constructing a concrete staircase, in the staircase mold into which the cement paste kneaded into a paste is poured, in the formwork, the inclination angle equal to that of the staircase to be constructed. A frame that is placed on a building surface for building stairs, a template that projects from the back surface of the frame in the building surface direction of the stairs to form each step wall surface of the stairs, and the front side of the frame Multiple
Several sheets are projected and cover the frame when the sheet is hung
The upper surface of the cement paste that is poured to support the
The sheet so as to form an inner space between the sheet and the sheet.
And a chevron portion for receiving.

[0005]

The staircase formwork of the present invention is a template plate that projects from the frame body toward the construction surface side by placing it on the construction surface for constructing the staircase at an inclination angle equal to the inclination angle of the staircase for constructing the frame body. Is the wall surface position of the step of each step of the stairs. Then, the cement paste kneaded in a paste form is poured and filled into the gap between the mold and the construction surface, the upper surface of each step portion is flattened, and then the filled cement paste is solidified. In winter, etc.
In the inner space formed between the surface and the sheet covering the frame,
Insert the tassel and remove the concrete from each step of the stairs.
At the same time, you can keep warm. By lifting the formwork with a crane after the cement paste is solidified, the formwork can be easily released from the concrete stairs and removed. The removed formwork is placed again at a predetermined angle on the construction surface for constructing another staircase, and is reused as a formwork for another staircase.

[0006]

The present invention will be described in more detail with reference to the drawings.
FIG. 1 is a plan view showing an embodiment of the present invention.
Reference numeral 0 is a frame body in which a plurality of vertical rails 14 and horizontal rails 12 are combined. The vertical crosspiece 14 and the horizontal crosspiece 12 forming such a frame body
As shown in FIG. 2 which is a side view of FIG. 1, I type steel is used. The formwork 10 is provided with a support base 20 on each lower surface side of both ends of the horizontal rail 12. The support base 20 is placed on a construction surface for constructing stairs, and the formwork 10 is set to a predetermined inclination angle. Support to become. A vertical rail 14 that is orthogonal to the horizontal rail 12 is provided on the lower surface side of the horizontal rail 12.
On the lower surface side of the template 16 is a template 16 extending in the longitudinal direction of the cross rail 12.
Is protruding. As shown in FIG. 1, the template 16 is provided at a predetermined interval while being orthogonal to the vertical rails 14. The template 16 is a member that forms the stepped wall surface of the step portion of the stairs, and the interval between the template 16 is the step width of the stairs. Further, as shown in FIG. 3, one end of the steel plate 16a of the template 16 is welded to the vertical bar 14 so that the angle of the steel plate 16a with respect to the vertical bar 14 becomes a projecting angle θ. Further, the steel plate 16a is reinforced by a rib 15 having one end welded to the vertical rail 14 and a reinforcing plate 16b welded to the rib 15. The projecting angle θ of the steel plate 16a with respect to the vertical rail 14 in the present embodiment is an angle that is perpendicular to the step surface of the stairs when the formwork 10 is placed on the building surface that constructs the stairs. Such a steel plate 16a is provided with a chamfering member 16c for chamfering the corner portion of the formed step portion. Further , as shown in FIG. 2 , the mold 10 is formed with a chevron portion 18 on the upper surface of each horizontal rail 12 .
In winter, etc., a heating device such as a stove is inserted into a space formed by hanging a sheet or the like on the mountain-shaped portion 18, and the form 10
It is possible to prevent the freezing of the concrete poured inside. Further, since the horizontal rails 12 constituting the mold 10 of this embodiment use I-shaped steel, each of the end faces of the horizontal rails 12 is
As shown in FIG. 4, it is I-shaped. Therefore, in FIG.
The hanging tool 22 having a U-shaped cross section shown in can be inserted into each end of the cross rail 12, and the formwork 10 can be hung by a crane or the like.

Form 10 of this embodiment shown in FIGS. 1 and 2.
Is placed on an inclined surface A for constructing stairs, as shown in FIG. At that time, adjust the position and height of the support base 20,
The inclination angle of the mold 10 is made equal to the inclination angle of the stairs to be constructed. In this embodiment, when the inclination angle of the vertical rail 14 and the inclination angle of the stairs to be formed are equal, the template 16 is formed.
Angle 16 of the steel plate 16a with respect to the vertical cross-piece 14 so that the steel plate 16a of FIG.
Has been adjusted. As described above, the time required for mounting the formwork 10 of the present embodiment on the inclined surface A and adjusting the inclination angle of the formwork 10 can be about two hours by two civil engineering workers. Next, the cement paste kneaded in a paste form is poured and filled into the gap between the mold 10 and the inclined surface A, and the upper surface of the step portion is flattened. At that time, the template 1 of the template 10
6 forms the step part wall surface of the step part. Next, the mold 10 is left as it is until the filled cement paste (concrete) is solidified. At this time,
When the concrete may freeze during the winter, etc., a sheet or the like is hung on the chevron portion 18 of the formwork 10 to form an internal space formed between the concrete surface and an oil stove or the like. insert the heating means it is possible to prevent freezing or the like of the concrete. Each step of the stairs
Since it is possible to heat and cure the uncret at the same time,
is there. Once the filled concrete has solidified, formwork 1
Release 0 from concrete stairs. In this embodiment, the hanging tool 2 shown in FIG.
2 can be mounted and the mold 10 can be lifted by a crane or the like to be easily released from the concrete stairs. If the concrete stairs and the formwork 10 are in close contact with each other and it is difficult to release the formwork 10 from the concrete stairs by a crane or the like, use a jack or the like in advance to form the formwork 10.
After slightly lifting and releasing from the concrete stairs,
The formwork 10 may be lifted by a crane or the like. In the concrete staircase constructed in this manner, the corners of the step portion are chamfered, and the removed formwork 10 can be reused as a formwork of another staircase. Also,
The construction method using the mold 10 of the present embodiment can shorten the construction period as compared with the conventional method using a mold using a control panel because the mold step of forming the mold can be eliminated. It is possible and the required personnel can be significantly reduced.

In the embodiment described above, the template 16 forming the step wall surface of the stairs is fixed to the vertical bar 14 and the rib 15 by welding, but the end of the template 16 is connected to the vertical bar. The template 16 may be rotatably attached to the shaft 14, and the template 16 may be connected to the other end of a turnbuckle or the like having one end fixed to the vertical rail 14. According to the template 16, the vertical rail 14 and the template 1
The projecting angle θ with respect to 6 can be changed to a desired angle by a turnbuckle or the like. In addition, when the cement paste is filled in the gap between the inclined surface A and the mold 10, a flat plate may be placed in advance on the step surface. By placing the flat plate in this manner, it is possible to eliminate the work of flattening the step surface after the cement paste is filled. Such a plate may have a surface engraved or the like.

[0009]

According to the method of using the staircase formwork of the present invention, since the formwork can be reused, the process of forming the formwork can be omitted. Also, during winter, etc.
Inner space formed between the strike upper surface and the sheet covering the frame
Insert the heating device into the
It is possible to heat and cure the mat at the same time. For this reason, at the present time when civil engineering workers, especially formworkers are insufficient, by using the staircase formwork of the present invention, a staircase made of concrete is constructed as compared with the conventional method of forming a formwork by a control panel. It is possible to shorten the construction period and reduce the required number of personnel.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is a partial cross-sectional view showing how the mold plate 16 is attached to the mold frame.

FIG. 4 is an explanatory diagram illustrating a suspender that suspends the form frame illustrated in FIG. 1.

FIG. 5 is an explanatory diagram illustrating a usage state of the frame body in FIG. 1.

[Explanation of symbols]

 Reference Signs List 10 Form frame 12 Horizontal beam forming frame body 14 Vertical beam forming frame body 16 Form plate 18 Mountain portion 20 Supporting base θ Projection angle

Claims (1)

[Claims] 1. When constructing concrete stairs,
In a staircase formwork into which a cement paste kneaded into a paste is poured, in the formwork form, a frame body placed on a construction surface for constructing the staircase so that the inclination angle is equal to that of the staircase to be constructed, a mold plate forming each of the stepped wall surface of the stepped projecting the construction plane direction of the stairs from the rear surface of the frame body, a plurality of projecting from the surface side of the frame body, the sheet covers the frame
It was poured while supporting the sheet from the inside when hanging
Form an inner space between the top surface of the cement paste and the sheet.
And a chevron portion for receiving the sheet to form a staircase formwork.