JPH05280205A - Dismantling method for form supported by provisionally installed column - Google Patents

Abstract

PURPOSE:To dismantle a form, which is supported with a head spindle installed on the top of a provisionally installed column in such a way as capable of emerging and retracting and a jack for dismantling installed thereupon, wherein the jack works to release the load and is formed in an easy-to-handle arrangement. CONSTITUTION:An emerging/retracting screw shaft 21 of a jack for dismantling 10 is lifted by a hydraulic jack, and a handle 23 is turned in the condition that the load applied between the screw jack 21 and the handle 23 in engagement therewith is reduced, and it is made possible for the screw shaft 21 to retract. Then the load on the dismantling jack 10 is released by disengaging the lifting-up with the hydraulic jack, and a head spindle 7 is retracted to secure a space in the part under a form 6, and the form 6 is dismantled.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of disassembling a mold supported by a temporary support, and more particularly, when the load is released and the dismantling jack at the upper end of the temporary support is withdrawn to release the mold. The present invention relates to a method of dismantling a formwork while securing a space under the frame.

[0002]

2. Description of the Related Art Conventionally, for example, when placing a slab of an elevated road on concrete, the main pipe columns 2 formed by connecting pipe column members 2a are arranged at four corners as shown in FIG. In addition, the square column-shaped temporary columns 1 assembled by connecting the horizontal joint members 3 and the braces 4 are arranged at appropriate intervals between the piers (not shown), and as shown in FIG. It supports the frame 6. Since the floor slab 5 is usually wide, a plurality of temporary columns 1, 1 are arranged at appropriate intervals in the width direction of the floor slab 5 as shown in FIG. It is connected.

As shown in detail in FIG. 5, the structure of the supporting portion of the mold 6 is such that a head spindle 7 which can be operated to move in and out by an operation handle 8 is arranged at the upper end of each main pipe post 2.
The dismantling jack 10 is arranged on the upper part of the pedestal 9 via the pedestal 9, and the inclined pedestal 11 is further arranged thereon. Then, the pillow girders 12 extending in the width direction of the floor slab 5 are arranged on the inclined pedestal 11, and the main girders 13 extending in the longitudinal direction of the floor slab 5 are arranged on the pillow girders 12. It supports the formwork 6. The upper ends of the head spindles 7 are supported by the spindle stiffener 14 after being adjusted in projection amount so as to support the mold 6 mutually and connected to the main pipe post 2.

Since a large load is applied between the formwork 6 and each main pipe post 2 when the formwork 6 is dismantled after the concrete is placed in the formwork 6 thus supported, The load is released by operating the dismantling jack 10 to retract the withdrawal screw shaft, and then the operation handle 8 of the head spindle 7 is operated to retract the head spindle 7 largely, and the pillow girder 12 and the main The girder 13 is lowered to secure a large space between the girder 13 and the mold 6, and the mold 6 is disassembled.

[0005]

In the method of disassembling the mold 6 supported by the temporary support 1 as described above, the load acting on each main pipe post 2 is first released by using the dismantling jack 10. By doing so, the operation of the operation handle 8 is facilitated, and it is possible to easily retract the head spindle 7 to secure a space for dismantling. Nevertheless, when operating the operation handle of the dismantling jack 10, it is natural. However, there is a problem that the operation is very difficult because the load is applied.

In view of the above problems of the prior art, it is an object of the present invention to provide a disassembling method in which the dismantling jack for releasing the load at the time of disassembling the formwork supported by the temporary support can be operated easily. ..

[0007]

DISCLOSURE OF THE INVENTION The present invention is a method for disassembling a form frame supported through a head spindle which is arranged at the upper end of a temporary support column and which can be operated to move in and out, and a disassembling jack on the head spindle. The push-in / push-out screw shaft is pushed up by a hydraulic jack to allow the push-in / pull-out screw shaft to move in and out by operating the operation handle while reducing the load acting between the push-in / pull-out screw shaft and the operation handle screwed to this. , The hydraulic jack is released to release the load acting on the dismantling jack, the head spindle is retracted to secure a space under the mold, and the mold is disassembled.

[0008]

According to the structure of the present invention, when the disassembling jack is operated to release the load, the push-out screw shaft is pushed up by the hydraulic jack, so that the push-out screw shaft is pushed between the dismantling jack and the operation handle. Since the applied load is reduced, the operating handle can be easily operated, and by releasing the pushing up by the hydraulic jack after that, the load applied to the temporary support column can be released via the dismantling jack,
The head spindle can be easily retracted and the formwork can be disassembled.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. Since the overall structure of the support structure for the mold 6 in this embodiment is the same as that described in the conventional example based on FIGS. 5 and 6, the same reference numerals are used for common components. Attached and incorporated the explanation,
Only the main part will be described here.

In FIG. 1A, a dismantling jack 10 as shown in FIGS. 2 to 4 is provided on a pedestal 9 provided on the head spindle 7 at the upper end of the temporary support 1. ing. An inclined pedestal 11 is arranged on the dismantling jack 10, a pillow girder 12 is fixed thereto via a chuck 15, and a main girder 13 is further fixed thereto via a chuck 15. A form frame 6 composed of steel flaps 16a and concrete panels 16b arranged vertically and horizontally is arranged on the main girder 13.

In FIGS. 3 and 4, the dismantling jack 10 is shown.
Is a pedestal 17 including a base 18 and a gate-shaped mount 19,
The lead-out screw shaft 21 and the lead-out screw shaft 2 which are arranged so as to penetrate through the opening 20 formed in the center of the upper surface of the pedestal 17 and to which the mounting plate 22 for mounting the tilted pedestal 11 is fixed.
1 and an operation handle 23 that engages with the upper surface of the pedestal 17 and has a space 24 in the pedestal 17 in which the portable hydraulic jack 25 is arranged, as indicated by a phantom line in FIG. Has been formed.

In the above structure, concrete is placed in the form 6 supported by the temporary support 1, and then the form 6 is formed.
When dismantling, the portable hydraulic jack 2 is placed in the space 24 inside the pedestal 17 of the dismantling jack 10, as shown in FIG.
5 is arranged, and a hand pump 26 is attached to the hydraulic jack 25.
The hydraulic pressure is sent to push up the push-out screw shaft 21 of the dismantling jack 10 as shown by the white arrow. Then, the load acting between the projecting / retracting screw shaft 21 and the operation handle 23 screwed thereto is reduced or released. In this state, the operation handle 23 is rotated to be separated from the upper surface of the pedestal 17, The retractable screw shaft 21 in the pedestal 17 is, for example, 20 to 30 mm.
It is possible to move in and out. Since the load is hardly applied when the operation handle 23 is operated, it can be easily operated. next,
When the pushing up by the hydraulic jack 25 is released, the push-out screw shaft 21 retracts accordingly and the load acting on the dismantling jack 10 is released. Thus, the load acting on the top spindle 7 at the upper end of the temporary support column 1 is released via the dismantling jack 10, and the head spindle 7
The pillow girder 12 and the main girder 13 are lowered by operating the operation handle 8 to retreat largely, and a space is secured between the main girder 13 and the formwork 6. In that state, the work of disassembling the mold 6 is performed.

As described above, according to the present embodiment, when the dismantling jack 10 is operated to release the load, the push-out screw shaft 21 is pushed up by the hydraulic jack 25.
The load acting on the operation handle 23 screwed to this can be reduced, the operation handle 23 can be easily operated, and thus the load acting on the temporary support 1 can be easily released. be able to.

In the above embodiment, the portable hydraulic jack 2 is placed in the pedestal 17 of the dismantling jack 10 when the mold 6 is dismantled.
Although 5 is arranged, it goes without saying that the dismantling jack 10 may be equipped with a hydraulic jack.

[0015]

According to the method of disassembling the formwork supported by the temporary support of the present invention, the hydraulic jack is used when the dismantling jack is operated as described above to release the load acting on the temporary support. By pushing up the push-out screw shaft, the load acting between it and the operation handle screwed onto it can be reduced, and the operation handle of the dismantling jack can be easily operated. Therefore, it is possible to facilitate the dismantling work of the formwork supported by the temporary support columns.

[Brief description of drawings]

FIG. 1 is a front view showing a main part of a method for disassembling a formwork supported by temporary columns in an embodiment of the present invention.

FIG. 2 is a front view showing a load releasing operation for the disassembling jack in the embodiment.

FIG. 3 is an enlarged front view of the disassembling jack in the embodiment.

FIG. 4 is a perspective view of the disassembling jack according to the embodiment.

FIG. 5 is a perspective view of a conventional installation pillar.

FIG. 6 is a front view showing a state in which a formwork is supported by an erection column of a conventional example.

[Explanation of symbols]

 1 Temporary Support 6 Formwork 7 Top Spindle 10 Jack for Dismantling 21 Retracting Screw Shaft 23 Operating Handle 25 Portable Hydraulic Jack

Claims (1)

[Claims] 1. A method of disassembling a form frame supported by a head spindle which can be operated to move in and out arranged on an upper end portion of a temporary column and a disassembling jack on the head spindle, wherein a screw shaft of the disassembling jack is used. Push up with a hydraulic jack and operate the operating handle to reduce the load acting between the push-in / push-out screw shaft and the operation handle that is screwed onto it. Release the load acting on the jack for dismantling, retract the head spindle to secure a space under the formwork, and dismantle the formwork, dismantling the formwork supported by temporary columns ..