JPH01158195A - Moving formwork device - Google Patents

Abstract

PURPOSE: To improve application ability by engaging a rod of a second jack with a recessed part in an already formed concrete wall to hold a frame, and forming a concrete wall from a formwork body at the tip of a rod of a first jack. CONSTITUTION: A first jack 2 is radially placed in the periphery of one end of a frame 1, and a second jack 6 is radially placed in the periphery of another end of the frame 1. An engaging element 7 at the tip of a rod of the second jack 6 is engaged with a recessed part 9 in an already formed concrete wall A with expanding or shrinking the frame 1 to hold the frame 1, formwork bodies 4b-4e at the tip of a rod 2a of the first jack 2 define a concrete wall C which has a recessed part. By repeating this operation, concrete walls are formed sequentially.

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Industrial Application Field The present invention relates to a mobile formwork apparatus suitable for shaft construction, caisson construction, and the like.

(2) Conventional technology A tightening device comprising a tightening shaft screwed into an anchor bolt and a drive source thereof is provided radially in the upper and lower parts of the frame, and a form body is provided in the lower part of the frame. At the same time, the tip of the tightening shaft of the lower tightening device penetrates the form body and protrudes forward thereof, and a mold removal device for the form body is provided in the lower part of the frame, The frame is suspended by a crane or other lifting equipment, the head of the anchor bolt is tightened and fixed to the tightening shaft of the lower tightening device, concrete is poured into the formwork body, and after curing and hardening, the above tightening is performed. At the same time, the shaft is removed from the anchor bolt, the formwork body is demolded by a demolding device, and the frame is lowered a predetermined distance by a lifting machine, and then the upper tightening device is activated so that the tightening shaft is attached to the anchor bolt. Set the screw-fixed groove frame, tighten another anchor bolt to the tightening shaft of the lower tightening device, pour concrete into the formwork body, and then repeat the above operations to construct the shaft, etc. What it does is known.

According to this conventional moving device, a lifting machine is required for the movement, and anchor bolts are required to set the frame and the formwork body, and a separate demolding machine is required for demolding the formwork body. There are problems in that the equipment is complicated and expensive, and it is difficult to automate it.

An object of the present invention is to solve these problems and provide a simplified mobile formwork device.

(4) Means for Solving the Problems In order to achieve this object, the present invention includes a frame capable of controlling expansion and contraction, first jacks arranged radially around one end of the frame, and other parts of the frame. a second jack arranged radially around the end; a formwork body fixed to the tip of the rod of the first jack and having a convex portion on the front; and a formwork body fixed to the tip of the rod of the second jack and said It is characterized by comprising an engaging body that can be secured to four parts of a concrete wall formed by convex parts.

(5) holding the frame by engaging the engaging bodies at the tips of the rods of the second jack with the four parts of the concrete wall already formed by the convex parts of the form body while expanding and contracting the working frame;
Concrete walls such as shafts are successively formed by repeatedly forming concrete walls having recesses using the form body at the tip of the rod of the first jack.

(6) Examples An embodiment of the device of the present invention will be described with reference to the drawings.

(1) indicates a frame, and the frame (1) includes an annular upper frame (1a), a lower frame (1b), and an upper inner and outer cylinder (lc) (!) hanging from the upper frame (1a).
d) and a lower inner/outer cylinder (le) (erected from the lower frame (lb) and slidingly in contact with these upper inner/outer cylinders (lc) (ld) (
if), the upper frame (1a) and the lower frame (
1b) Lifting jacks (1
g)...(1g), and these lifting jacks (
According to the operation of (1g)...(1g), the upper inner and outer cylinders (lc
) (ld) and the lower inner and outer cylinders (1e) (if), the frame (1) is made to expand and contract while making sliding contact.

(2)...(2) indicates the first jack;
The jacks (2)...(2) are provided radially on the lower frame (ib) so that their lofts (2a) move outward and backward, and each of these first jacks (2)
A formwork main body (4) is fixed to the tip of the rod (2a) via a support (3), and the formwork main body (4) has a curved backing plate (4a) divided into a plurality of parts and its lower end. A receiving plate (4b) pivotally connected to the supporting plate (4b), an auxiliary jack (4C) that rotates the receiving plate (4b) for setting and demolding, and a guide roller (4d) attached to the upper end of the contact plate (4a). ) and the receiving plate (4
b) and a seal (4e) provided at the tip of the support plate (4a), and a protrusion (5) protruding forward is formed at the support (3).

(6)...(6) indicates the second jack, and these second
The jacks (6)...(6) are provided radially on the upper frame (1a) so that their rods (6a) move outward and back, and each of these second jacks (6)
The engaging body (7) was fixed to the tip of the rod (6a).

(8) shows the concrete supply pipe.

Next, construction of a circular shaft using the apparatus of the above embodiment will be explained.

As shown in Fig. 1 (a), after forming the concrete wall at section C, the second jack (6)...(6) rod (6a)...
(6a) is moved backward to separate each engaging body (7) from the four parts (9) of the inner surface of the concrete wall in section A. After that, actuate the lifting jack (Ig) (1g) to move the rod back, retract the frame (1), and lower the upper frame (la) a predetermined distance to the state shown in Figure 1 (b). Make it. Then, actuate the second jacks (6)...(6) to advance the rods (6a)...(6a) and engage each engaging body (7) with the four parts (9) of the concrete wall in section B. and frame (1
) in the shaft, and then use the auxiliary jack (4C)...
・Activate (4C) to lower the tips of the receiving plates (4b)...(4b)' to remove and mold them, and also remove the first jack (2).
...(2.) also operates and rod (2a)...(2a
) and remove the contact plate (4a)...(4a) from the mold.
Set it to the state shown in (C) in the figure. After that, lift and lower the jack (1g)
...(1g) to extend the frame (1) to a predetermined length, and then actuate the first jack (2)...(2) to extend its rod (2a)...(2a) Advance to this board (l
a) ...(1a) (7) Touch the upper end to the lower end of the concrete wall of part 0 and attach the auxiliary jack (4C
)...(4C) to operate the receiving plate (4b)...(4b
) is moved upward to bring the seal (4e) into contact with the ground, bringing it into the state shown in FIG. 1(d). Thereafter, concrete is supplied from the supply pipe (8) and poured into the form body (4). Then, as the concrete cures and hardens, a concrete wall is formed below the 0 part, and at this time, the convex part (
5), four parts (9)...(9) are also formed on the front surface of the concrete wall below the part 0. Thereafter, the above-mentioned construction is repeated in order to form the inner wall of the shaft downward.

FIG. 3 shows another embodiment, in which the first
The jacks (2)...(2) are attached to the rods (2) of these jacks (2)...(2) on the periphery of the lower frame (1b).
2a)...(2a) are provided so as to move inwardly, and the formwork body is attached to the tips and ends of these rods (2a)...(2a) via supports (3). (4) is provided, and convex portions (5)...(5) are formed on the contact plate (4a) of the form body (4) to protrude toward the inner surface thereof, and a second jack ( 6)...(6) also these rods (6a
)...(6a) are provided radially so as to advance and retreat inward, and the engaging bodies (7) are provided at the tips of these rods (6a)...(6FL), as in the previous embodiment. The expansion and contraction of the frame (1) and the first jack (2)...(
2) and the operation of the second jacks (6)...(6), etc., it is possible to create a structure such as a columnar body.

Note that, unlike the above embodiment, the frame is formed into a rectangular cylindrical telescoping type, and a rectangular cylindrical form body is provided at the tip of the rod of the first jack provided at a predetermined interval on the lower frame of the frame, Further, engaging bodies may be provided at the ends of rods of second jacks provided at predetermined intervals on the upper frame to form a concrete wall of a rectangular object such as a caisson.

(7) Effects of the Invention As described above, according to the present invention, while expanding and contracting the frame, the engaging body at the tip of the rod of the second jack is engaged with the concave part of the concrete wall that has already been formed by the convex part of the form body. By repeating the process of holding the frame by holding the frame and forming a concrete wall with a concave part using the formwork body at the end of the rod of the first jack, the concrete walls of the shaft etc. were formed one after another. The lifting machine, anchor bolts, etc. required in the mobile formwork equipment of It has various effects that can be applied to shield work, construction work of tunnels, pillar-like structures, etc.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view showing the operating state of an apparatus according to one embodiment of the present invention, FIG. 2 is a cross-sectional view, and FIG. 3 is a cross-sectional view of the apparatus according to another embodiment. (1)...Frame (2)...Il jack (4)...Form body (5)...Protrusion (6)
...Second jack (7)...Engagement body "('9)
... Concave portions (A) to (C) ... Concrete patent applicant Mitsui Construction Co., Ltd. (C)

Claims (1)

[Scope of Claims] A frame capable of controlling expansion and contraction, first jacks arranged radially around one end of the frame, and second jacks arranged radially around the other end of the frame. a formwork body that is fixed to the tip of the rod of the first jack and has a convex portion on the front surface; and a formwork body that is fixed to the tip of the rod of the second jack and can be engaged with a recess in the concrete wall formed by the convex portion. A movable formwork device comprising an engaging body.