JPS6224671Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] This invention is applicable to the preparation of manholes, etc., when special formwork pieces are used to embed protrusions such as ramps at the same time. This invention relates to a height adjuster for a formwork piece for embedding a ramp to adjust its position from the finished horizontal surface.

[Conventional technology]

Conventionally, when embedding a protrusion such as a ramp into a concrete structure, a large number of formwork pieces having flanges with connecting holes around them are combined to form a formwork such as a manhole. The method used was to pour fluid concrete, allow it to harden, remove the mold, scrape away the buried area, and then re-fill the legs of the protrusion and harden it with concrete.

This method is not only time-consuming but also has a negative effect on the strength of embedding the protrusion, so various methods have been proposed for embedding the protrusion at the same time as concrete pouring. In other words, it is a special formwork that can be removed from the mold after hardening and that allows concrete to be poured while holding the legs of the ramp. For example, Utsukai 56-
No. 73762, etc., where a window through which the ramp can pass is provided in the formwork piece, and the legs of the ramp are held between the windows.
There is a method of inserting an insert body that is divided into pieces, or a method of dividing the formwork piece into two horizontally and providing a leg holding part of the ramp on the horizontal flange itself.

[Problem that the invention attempts to solve]

However, the ramps are buried at the same spacing from top to bottom, and the position of the top ramp is defined at a constant spacing from the finished horizontal surface. On the other hand, formwork is assembled from the bottom, and if the ground is often sloped and piled up randomly from the bottom, the height of the top formwork from the ground will not be constant. In such cases, with conventional formwork, concrete can be poured to a specified height even if the formwork protrudes from the finished horizontal surface, but with special formwork for embedding ramps, such According to the method,
The position of the topmost ramp from the finished horizontal plane cannot be maintained accurately.

In such cases, a platform was provided at the bottom to accommodate the height difference so that the topmost ramp would be in the correct position. Since this work is quite complex, there has been a need for a method that allows for easy height adjustment of special formwork.

[Means of problem solving]

The purpose of this invention is to solve the above problem, and its configuration consists of a normal formwork piece with vertical and horizontal flanges around the periphery and a formwork piece for embedding the ramp, with holes drilled in the flange of each formwork piece. In the formwork that is assembled and connected by connecting holes, the interval between the connecting holes of the normal formwork pieces is an integral number of times larger than that of the formwork pieces for embedding the ramps, and the width is the same as the width of the formwork pieces for embedding the ramps. Or, at the lower end of a wider height adjustment plate, attach two vertical flanges that have connecting holes with regular formwork pieces to the height adjustment plate so that they have the same width as the formwork pieces for embedding the ramp. It is characterized by extending in the vertical direction and leaving a wide plate-shaped portion at the top of the vertical flange.

The height adjuster of the present invention consists of a plate-shaped part having a curved surface or a flat surface that matches the formwork piece for embedding the ramp, and two vertical flanges fixed at the same distance as the formwork for embedding the ramp provided at the lower end. It consists of. In the embodiment shown in FIG. 1, since the formwork for embedding a ramp is flat, the plate-like portion is also flat; however, if the formwork for embedding a ramp is a curved surface, a curved surface corresponding to this is used. It is preferable to provide a vertical flange at the lowermost end, and further provide horizontal flanges at both upper and lower ends of the reinforcing upper vertical flange. In some cases, it is preferable to further provide vertical and horizontal bars.

The width of the plate-shaped portion is preferably the same width as or more than the width of the formwork for embedding the ramp, and is preferably slightly wider than the formwork for embedding the ramp. The height is such that the top of the vertical flange provided at the lowest end of the plate-shaped part is greater than or equal to the vertical distance between the ramps.
Preferably, the distance is approximately twice the vertical distance between the ramps.

In a normal formwork, the distance between the centers of the connecting holes provided in the vertical flange is an integral multiple of that of the formwork for embedding the ramp, preferably 2 to 5 times.

The present invention can be applied to any formwork in which the ramp can be embedded at the same time as concrete is poured.

[Effect]

The present invention is a height adjustment tool consisting of a plate-like part on which the bottom platform piece for embedding a ramp can slide up and down, and a vertical flange having a connecting hole provided at the lower end of this plate-like part. At the lowest level, a normal formwork piece and the adjuster of the present invention are connected through a connecting hole in the vertical flange, and then any connecting hole in the flange of the formwork piece for embedding a ramp at the lowest level is connected to the normal mold. By connecting arbitrary connecting holes of the frame pieces, the height of the platform piece for embedding the ramp can be arbitrarily adjusted while leaving a plate-shaped portion in the center. For example, in the case shown in FIG. 1, the ratio of the intervals between the connecting holes provided in the vertical flanges of the ramp embedding form piece and the normal form piece is 1:3. That is, by sliding the ramp embedding mold piece up and down, the adjustment width of the height of the lowermost mold piece can be reduced to 1/3 of the conventional height according to the position of the uppermost ramp.

〔Example〕

FIG. 1 is a perspective view showing an assembled state of one embodiment of the present invention. 1 is a plate-shaped portion having a vertical flange 2, a horizontal flange 3, and a vertical bar 7 at its lower end. A connecting hole 4 is bored in the center of the vertical flange 2, and the connecting hole 4a provided in the vertical flange 2a of an adjacent ordinary formwork piece 5 is connected to the connecting hole 4a using a U clip or the like.
6 is a formwork piece for embedding the ramp, and the vertical flange 2b
In this case, connect the connecting holes 4b to 3 of the connecting holes 4a of the ordinary formwork piece.
The holes were drilled at twice the density. In this figure, the connection hole 4a of the normal formwork piece and the bottom connection hole 4b are connected, so the connection hole directly above 4a of the normal formwork piece and the bottom of the formwork piece for ramp embedding are connected. to the fourth connecting hole. Thereafter, the formwork is completed by connecting and stacking each formwork piece from the bottom in this manner. The holes to be connected to the normal formwork pieces in the formwork piece 6 for embedding the ramp can be arbitrarily selected according to the situation at the site.

In this embodiment, the connecting holes 4a of the regular formwork pieces 5 are provided at 150 mm intervals, and the connecting holes 4b of the ramp embedding formwork pieces 6 are provided at 50 mm intervals, so that the height of the ramp embedding formwork pieces 6 is The height adjustment can be finely adjusted in 1/3 intervals, making it even easier to adjust the embedding position of the ramp.

FIGS. 2 and 3 show an embodiment of a formwork for embedding a manhole ramp. 6 is a formwork piece for embedding the ramp, and in this example, the height is 600 mm.
mm was used. A vertical flange 2 and a horizontal flange 3 each having a width of about 50 mm were provided around the periphery. The spacing between the connecting holes 4b in the vertical flange is the same as in the first embodiment. 8
is a frame body, and the concrete contact surface is the back side of the figure, and the space surrounded by the frame body 8 has a shape close to a trapezoid with the concrete contact surface as the base. If the legs 11 of the ramp 9 are held between the two pieces of the insert 10 and inserted into the frame 8 from the concrete contact surface, the insert 10 will have the same shape as the space formed by the frame 8. Therefore, it fits tightly and there is almost no difference in level between it and the formwork piece for embedding the ramp.

After curing, when removing the mold, use U clips, bolts,
Since the thumbscrews and other flange connection means are removed and the form piece 6 is moved from the concrete surface, the insert 10 naturally separates from the frame 8 and the frame 8
The insert 10 separated from the concrete surface naturally splits into two, leaving only the ramp 9 on the concrete surface.

This invention is not limited to the above-mentioned formwork for embedding the ramp.
It can also be applied to other forms for embedding ramps.

[Effect of idea]

The present invention makes it easy to adjust the position of the topmost ramp from the finished horizontal surface even when using a formwork for embedding the ramp.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a perspective view showing an assembled state, FIG. 2 is an elevational view with a partial cutout, and FIG. 3 is a cross-sectional explanatory view of FIG. 2. In the drawings, reference numeral 1 indicates a plate-shaped portion, 2 indicates a vertical flange, and 3
is a horizontal flange, 4 is a connecting hole, 5 is a normal formwork piece,
6 is a mold piece for embedding a ramp, 8 is a frame, 9 is a ramp, 10 is an insert, and 11 is a leg of the ramp.

Claims (1)

[Scope of utility model registration request] In a formwork that is used by assembling a normal formwork piece with vertical and horizontal flanges around its periphery and a formwork piece for embedding a ramp through connection holes drilled in the flanges of each formwork piece, the normal formwork The connecting hole interval of the frame piece is an integral number of times larger than that of the formwork piece for embedding a terrace, and a normal formwork piece is placed at the lower end of the height adjustment plate that is the same as or wider than the width of the formwork piece for embedding the terrace. Two vertical flanges each having a connecting hole are extended perpendicularly to the height adjustment plate so as to have the same width as the formwork piece for embedding the ramp, leaving a wide plate-like part at the top of the vertical flanges. Height adjustment tool for formwork pieces for embedding a ramp.