JPS6355268A - Mold frame apparatus of reverse winding construction method - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a formwork device used in a reverse winding method in which concrete is sequentially poured from the top to the bottom along an earth retaining wall.

(Prior art) As a technique for simplifying the work of installing formwork for the reverse winding method, the ``Method for installing shoring in the reverse winding method'' of Japanese Patent Publication No. 11015/1983 is well known. There is. In this conventional technology, the vibrators are buried vertically in concrete at each level from the top to the bottom, and the vibrators at each level are added together. A wire or the like is passed through this vibrator, the bottom form is suspended and supported by this wire, and the bottom form is moved from above using a crane or the like.

(Problems to be Solved by the Invention) According to the above-mentioned conventional technology, the workability is considerably improved compared to the traditional method of building scaffolding from the ground level of the construction site and installing and removing formwork. will get better. However, it is still necessary to bury the vibrator, to pass a wire etc. through the buried vibrator, and to attach and remove the wire etc. and the bottom formwork, and there is a need for further labor saving. Furthermore, the deeper the bottom formwork is installed, the more difficult it is to receive instructions from the crane operation sounds on the ground, making it more difficult to accurately position the bottom formwork.

This invention was made in view of the above-mentioned conventional problems, and is a formwork device for the upside-down construction method that enables efficient and accurate movement, positioning, and fixation of the body of the formwork and bottom formwork in the reverse-winding construction method. Our goal is to provide the following.

<Means for Solving Problem 12'1) The formwork device according to the present invention comprises a side formwork plate suspended and supported almost perpendicularly to the earth retaining wall body at a predetermined interval, and this side formwork. a slider that is guided and movable in the vertical direction along the plate; a drive mechanism that moves the slider in the vertical direction;
The slider is provided with a bottom frame plate which is detachably attached to the slider and projects like a shelf from the side frame plate.

(Function) The above side formwork board is suspended using a crane vehicle or the like and placed in the designated position. The bottom frame plate is attached to the side frame plate via the slider, and projects like a shelf from the bottom frame plate. This bottom frame plate is moved in the vertical direction by the drive mechanism, placed at a predetermined position, and fixed with hanging reinforcing bars.

(Example) Fig. 1 and Fig. 2 show the configuration of a formwork device according to an embodiment of the present invention, and Fig. 3 shows how it is used! It shows.

Reference numeral 1 denotes a side form plate of a predetermined size and approximately flat plate shape (for example, when constructing an underground tank, it will have a curved shape), and a bracket 2 is integrally provided on the upper edge of the side form plate, and a wire is connected to the side form plate 1. 3 and hang it with a crane 4 as shown in Fig. 3. When the device is in use, crane 4
As shown in FIG. 3, the side formwork board 1 suspended from the earth retaining wall 5 is disposed substantially perpendicularly to the retaining wall 5 at a predetermined distance J3.

Two screw shafts 6 are attached to the outer surface of the side formwork plate 1 in parallel in the vertical direction. The lower end of the screw shaft 6 is supported by the side form plate 1 by a bearing 7, and the upper end of the screw shaft 6 is connected to the output shaft of a motor 8 mounted on the side form plate 1.

A slider 9 is screwed onto the two-piece screw shaft 6. Two screw nuts 10 are built in the slider 9 in parallel, and the screw shaft 6 passes through the screw nuts 10. motor 8.8
When they are rotated at the same speed and in the same direction, the screw shaft 6 rotates at the same speed and in the same direction, and the slider 9 moves upward or downward according to the lead of the screw shaft 6. In other words, the position of the slider 9 relative to the side frame plate 1 can be freely changed in the vertical direction by electrically controlling the motor 8.

In addition, the side formwork board 1 has two wooden slits 1 that are parallel to each other in the vertical direction.
1 is formed, and the side form plate 1 is inserted through this slit.
A bottom frame plate 12 disposed on the inner surface of the slider 9 is detachably attached to the slider 9.

The bottom frame plate 12 is a structure made by combining two plates at an appropriate angle, and when it is attached to the slider 9,
As shown in FIG. 2, the bottom frame plate 12 is disposed so as to protrude from the side frame plate 1 in the form of a shelf or a sash.

On the joint end side of the bottom frame plate 12, there is a shaft part (not shown) that fits into the mounting hole of the slider 9 through the slit 11, and this shaft part is fixed on the back side of the slider 9 with a fastener 13. ing. By removing this fastener 3, the bottom frame plate 12 can be removed from the slider 9.

With the bottom frame plate 12 attached to the slider 9, if the slider 9 is moved up and down by the motor 8,
bottom! The frame plate 12 also moves up and down integrally.

In FIG. 3 showing the usage state of the above formwork device, C1
indicates the first stage of concrete poured first, C2 indicates the second stage of concrete poured below it, and C3 indicates the third stage of concrete poured below it. The formwork apparatus in the state shown in the figure is in preparation for pouring the fourth stage of concrete. The entire device (side form board 1) is suspended by the crane 4, and as shown in Figure 3 (a> The reinforcing bars 14 are connected and extended downward.

Next, the motor 8 moves the slider 9 downward fJJ,
The bottom frame plate 12 attached to the slider 9 is placed in the fourth stage concrete placement position! After determining the position while making adjustments, fix it with the hanging iron fII 14 (see Fig. 3(b)).

In this state, a reinforcing steel cage is placed in a space surrounded by the retaining wall 5, the side bar 1 frame plate 1, the lower surface of the third stage concrete C3, and the bottom frame plate 12. When installing this reinforcing cage,
As shown in FIG. 3(C), the slider 9 and the bottom frame plate 12
is removed once, the side formwork plate 1 is moved upward by the crane 4, and the space created by this is used to perform the work of arranging the reinforcing bar cage.

After the reinforcing cage is installed, the side form board 1 is suspended again, the slider 9 and the bottom form board 12 are connected, and concrete is poured into the above space.

Once the fourth stage concrete has hardened, repeat the above procedure once again to prepare for pouring the fifth stage concrete.

(Effects of the Invention) As explained in detail above, in the formwork device for the inverted construction method according to the present invention, the side formwork plate and the bottom formwork plate are integrally suspended by a crane or the like, and the entire structure is suspended. In addition to being able to move the bottom frame to the side, the position can be adjusted by finely moving the bottom frame board up and down relative to one frame, making it possible to work with the upside-down construction method, which involves successively pouring from the top to the bottom. The work of removing, moving, and reexamining the formwork as it progressed was extremely efficient.

[Brief explanation of drawings]

FIGS. 1 and 2 are perspective views of a formwork apparatus according to an embodiment of the present invention, viewed from different directions, and FIG. 3 is a schematic diagram showing the state in which the above formwork apparatus is used. １・・・・・・・・・Side formwork board ３・・・・・・・・・
・・Y V-4・・・・・・・・・Crane 5・
・・・・・・Earth retaining wall 6・・・・・・Screw shaft 7・・・・・・Bearing 8
...Motor 9 ...Slider 10 ...Screw nut 11 ...Slit 12 ...Bottom frame plate 13 ...... Fastener 14...
Applicant for revision of hanging reinforcing bars: Daihai Daidai Co., Ltd. Patent attorney - Shiro Kenhido
Patent attorney Masatoshi Matsuki M3 diagram (d)

Claims (1)

[Claims] (1) A side formwork plate suspended and supported almost perpendicularly to the retaining wall body at a predetermined interval, and a slider provided so as to be movable while being guided in the vertical direction along the side formwork plate; A formwork device for the reverse winding method, comprising a drive mechanism that moves the slider in the vertical direction, and a bottom form plate that is detachably attached to the slider and projects like a shelf from the side form plate. .