JPH04189506A - Form for manufacturing concrete segment - Google Patents

Abstract

PURPOSE:To safely and smoothly perform the swinging operation of side forms a small number of workers in a short period of time by a method wherein both the side forms, which form the side faces on the tunneling direction side, are swinging journaled to a pedestal, which supports the bottom form for forming an inner peripheral surface and, further, swinging motion supporting devices are provided to both the side forms. CONSTITUTION:A form 1 consists of a pedestal 4, which supports the bottom form 10 for forming the inner peripheral surface of a concrete sigment 2, and both side forms 3 and 3, which form the side faces on the tunneling direction side of the segment 2 and are swingingly journaled to the pedestal 4. Further, to each of both the side forms 3 and 3, a swinging motion supporting device 5, which supports said side form 3 at all times under the condition being energized to the direction to bring the side form to the position under production state and guides said swinging motion, is provided. Since the side form 1 is energized with the swinging motion supporting device 5 at all times to the direction to bring the side form to the position under the production state of the concrete segment 2, the swinging operation of the side form 1 can be performed safely and smoothly by a small number of workers in a short period of time.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a formwork used in manufacturing concrete segments that constitute a tunnel by connecting and fixing a large number of concrete segments.

(Prior art) Conventionally, this type of formwork is generally known in which both sides of the concrete segment forming the tunnel-direction side are pivoted so as to be swingable. When demolding the completed mold and assembling it as a mold, the side frames are swung.

[Problems to be Solved by the Invention] However, in the conventional formwork described above, the work of demolding the side frame and swinging it during assembly is difficult because the side frame itself is long and quite heavy, so it is necessary to use wires etc. It is necessary to carry out the work while supporting it in a suspended state, and since it is carried out while supporting it, several workers are required for the swinging work. This becomes noticeable when assembling the side frame in a lifted state and swinging it.

Therefore, it takes a lot of time to demold and assemble the side frame, and this work requires several workers, which creates problems such as high labor costs. Ru.

This invention □゛1 was devised in view of the above-mentioned circumstances, and its purpose is to manufacture concrete segments that can easily and quickly swing the side frame during demolding and assembly with less force. Our purpose is to provide formwork for

[Means to solve the problem]

The formwork for producing concrete segments according to this invention is
Both side frames, which form the side surfaces of the concrete segment in the tunnel direction, are swingably pivoted to a pedestal that supports a bottom frame for forming the inner circumferential surface of the concrete segment. Further, the both side frames are provided with a swing support device that supports the twenty side frames in a state where they are always biased toward the manufactured position of the concrete segment and guides the swing thereof.

Since the side frame is always urged toward the manufactured position of the concrete segment by the swing support device, the side frame is always urged toward the manufactured position of the concrete segment, so that the side frame is always urged toward the manufactured state position of the concrete segment, and therefore, when the formwork is demolded and assembled. The swinging work of the side frame can be performed safely, smoothly, and in a short time with less force, that is, fewer workers.

(Example) The concrete segment manufacturing formwork of the present invention will be described below with reference to an example illustrating the formwork.

A formwork 1 (see Figures 1 to 3) used when manufacturing concrete segments 2 that form a tunnel by combining a large number of them is a pedestal that supports a bottom frame 10 for forming the inner peripheral surface of the concrete segment 2. 4, both side frames 3, 3 forming the side surfaces of the concrete segment 2 in the tunnel direction are pivotally attached to the concrete segment 2 so as to be swingable.

Further, the both side frames 3, 3 are provided with a swing support device 5 that supports the 20 side frames 3 in a state where it is always biased in the direction of the manufactured state position of the concrete segment 2 and guides its swing. ing.

The swing support device 5 in this embodiment includes a swing guide bar 6 that is swingably pivoted to the pedestal 4 in a state of penetrating the side frame 3 and protruding outward from the formwork 1; A pressing plate 8 is fixed by a nut 7 screwed into a threaded portion 6a formed at the protruding end of the swinging guide bar 6, and the swinging guide bar is fixed between the pressing plate 8 and the side frame 3. 6 and a compression spring 9 interposed therethrough.

Since the pressing plate 8 is fixed to the pedestal 4 by the swinging guide bar 6, the compression spring 9 always moves the side frame 3 toward the pedestal 4 even in the swinging state due to the force of returning from the compressed state to the extended state. In other words, the force is being applied in the direction of the manufactured state position of the concrete segment 2. Further, this compression spring 9 is attached to the threaded portion 6a of the swinging guide bar 6 of the nut 7.
The compression state of the compression spring 9 can be changed by changing the screwing state of the compression spring 9 and the distance between the press plate 8 and the side frame 3.

Furthermore, the swing guide bar 6 here is pivoted inside the pedestal 4 at a position below the pivoting part of the side frame 3, and extends through the round hole 4a of the pedestal 4 and the elongated hole 3a of the side frame 3. It penetrates and projects outward from the formwork 1.

Since the side frame 3 of the concrete segment production form l having such a configuration is biased and supported by the compression spring 9 of the swing support device 5 during demolding, it does not swing under its own weight. The mold can be easily demolded by smoothly rocking it with little force.

Also, when assembled, the side frame 3 is attached to the compression spring 9 of the swing support device 5.
Since the concrete segment 2 is biased in the direction of the production state position, it can be lifted and swung with a small amount of force, making it easy to assemble the formwork 1 after setting it in the production state position with a small number of workers. can be done.

In this way, according to the formwork 1 for producing concrete segments of the present invention, the work of swinging the side frame 3 during demolding and assembly can be done with less force.

In other words, the process can be carried out safely and smoothly in a short time with a small number of workers, and concrete segments can be manufactured easily and in a short time.

〔Effect of the invention〕

In the formwork for producing a concrete segment of the present invention, both side frames for forming the side surface of the concrete segment on the tunnel direction side are pivotably pivoted on a pedestal supporting a bottom frame for forming the inner peripheral surface of the concrete segment. It will be worn. Further, each side frame is provided with a swing support device that supports the side frame in a state where the side frame is always biased in the direction of the manufactured state position of the concrete segment and guides the swing of the side frame. .

According to this configuration, the side frame is always urged in the direction of the manufactured state position of the concrete segment by the swing support device, so that the work of swinging the side frame when demolding and assembling the formwork can be avoided. , can be performed safely, smoothly, and in a short time with less force, that is, fewer workers.

Therefore, the concrete segment can be manufactured easily and in a short time, and the concrete segment can be provided at low cost.

[Brief explanation of the drawing]

FIG. 1 is a sectional view taken along the line A-A in FIG.
FIG. 2 is an enlarged detailed view of part B in FIG. 3, and FIG. 3 is a front view showing the formwork for producing concrete segments of the present invention. 1...Formwork, 2...Concrete segment, 3.
... Side frame, 3a... Long hole, 4... Pedestal, 4a...
Round hole, 5... Swinging support device, 6... Swinging guide bar, 6a... Threaded part, 7... Nand, 8... Pressing plate, 9... Compression spring, work 0 ...Bottom frame. il1 figure

Claims (1)

[Claims] In a formwork used when manufacturing concrete segments that form a tunnel by combining a large number of them, a pedestal supporting a bottom frame for forming the inner peripheral surface of the concrete segment is provided with a mold for forming a tunnel. Both side frames forming the side faces in the tunnel direction are pivotally attached to each other so as to be able to swing freely, and the side frames are supported by the side frames in a state where they are always biased in the direction of the manufactured position of the concrete segment. ,
A formwork for producing a concrete segment, characterized in that it is provided with a swinging support device that guides its swinging.