JPS6114307B2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a self-lifting formwork device for constructing high-rise structures such as dams by sequentially placing multi-story concrete while automatically moving the formwork up. It is.

Conventional formwork equipment of this type involves fixing the lower part of the vertical end of the formwork to the underlying concrete using Siebolds, driving wedges between the formwork and the vertical end, and installing the formwork on the concrete pouring surface. something is known.

However, with this conventional device, the work of driving or removing a wedge is required when installing or peeling off the formwork, which is complicated, and the wedge does not provide sufficient separation space, so it is difficult to attach the wedge to the formwork when it is lifted. There were other difficulties, such as the face timbers becoming an obstacle to the ascent, and the angle of the formwork being difficult to adjust when installing it.

In order to solve the above-mentioned conventional problems, this invention
It is an object of the present invention to provide a self-lifting formwork device in which the formwork can be easily installed and peeled off, a sufficient peeling space can be secured, and the formwork can be easily lifted and angled.

The present invention will be described below with reference to the illustrated embodiment.Fixed end pieces 2 are fixed to the left and right sides of the back surface of the formwork 1, and a movable end piece 3 is fixed to the middle portion thereof with the lower portion thereof protruding downward.

The fixed end piece 2 and the movable end piece 3 are provided with mounting hardware 5, 5' for the dummy bolt 4 at the formwork attachment part, and furthermore, the mounting hardware 7 for the Siebold 6 and the jack bolt 8 are provided at the lower part of the moving end piece 3. A mounting hardware 9 is provided.

A movable fixing device 10 is provided at the lower part of the fixed end piece 2 for moving it forward and backward and fixing it. The main body of this movable fixing device 10 includes a hollow fixing frame 11 that can be fixed to a concrete surface, and is loosely inserted into the hollow fixing frame 11 so as to be swingable, and its rear end is connected to the fixing frame 11.
1, and a hollow guide frame 12 is swingably attached to the rear of the fixed end 2, and the lower part of the fixed end 2 is slidably inserted into the guide frame 12. A hydraulic cylinder 13 is loaded in the lower part of the fixed end 2, and the pivot 14 at the rear end is inserted into the elongated hole 15 of the fixed frame 11 through the through hole of the guide frame 12, and movably locked with a nut 16. The telescopic rod 13' at the tip has a fixed end thickness of 2
installed on.

Therefore, this fixed end thick 2 slides back and forth within the guide frame 12 by the hydraulic cylinder 13, and the guide frame 12 swings (e.g. (approximately 10cm).

A long hole 17 is provided in the side surface of the fixed frame 11 along its longitudinal direction, and anchor bolts 19 and 19' are inserted through the long hole 17 at the fixed portions 18 provided at both ends of the long hole 17, and the concrete is removed. The fixed frame 11 is fixed by tightening into an anchor A embedded in the frame. In addition, each fixing part 18 is provided with a bolt through hole 18' on a mutually opposing surface.

A swinging means 20 for the guide frame 12 is provided at the tip of the fixed frame 11 . This swinging movement means 20 is composed of a hydraulic jack 21 such as a center hole jack attached to the upper surface of the fixed frame 11, and a gate-shaped hanging hardware 22 attached to the upper end of the telescopic rod 21'.
The left and right lower ends of the guide frame 12 are connected to pins 24 that protrude from both sides of the guide frame 12 through the long holes 23 of the fixed frame 11, and by extending and contracting the hydraulic jack 21, the guide frame 12 is moved through the hanging hardware 22. It swings with the fixed end.

A fixing bolt 25 is inserted into the center hole of the hydraulic jack 21 from above the hanging hardware 22, its lower part is screwed into the jack base 26, and a clamping body 27 is attached to its tip. This clamping body 2
A through hole 28 through which the clamping body 27 can pass is formed in the part of the guide frame 12 immediately below the clamping body 27, and by tightening the fixing bolt 25, the clamping body 27 passes through the through hole 28 and is placed on the fixed end thick 2. Crimp and tighten to secure. The clamping body 27 is arranged to be housed in a space 27' above the fixed frame when the fixing bolt 25 is raised.

Furthermore, a lifting means is provided at the tip of the fixed frame 11 to lift it off the concrete surface when moving it upward. This lifting means consists of a cam lever 30 attached to a pivot shaft 29 supported at both ends on a bracket, and a pusher 31 protruding from the guide frame 12 directly below the cam at the tip of the cam lever 30. When 19' is loosened, the cam lever 30
The end cam presses the pusher 31 projecting onto the fixed frame, and the fixed frame 11 can be lifted somewhat above the concrete surface using the guide frame 12 as a reaction force.

A jack bolt 32 is screwed into the middle part of the upper surface of the fixed frame 11 toward the guide frame 12, and by tightening this screw, the angle of the guide frame 11 and the fixed end thick 2 is adjusted using the pin 24 as a fulcrum, and the formwork is fixed. 1 can be rebuilt.

A roller cam lever 35 rotatably attached to a shaft 34 supported by a bracket 33 is provided at the front middle rear portion of the fixed frame 11, and is supported by the bracket 33 with some play just below the tip cam. A pusher 37 attached to a shaft 36 is provided. A support post 39 supporting a roller 38 is attached to both ends of the shaft 34, and this roller 38 is supported by a support post 39.
Also, the holding parts 4 provided on both sides of the fixed frame 11
It is slidably disposed within 0. Therefore, when the anchor bolt 19' is removed, the anchor bolt 19' is loosened, and the fixed frame 11 is moved, when the lever 35 is lifted and the pusher 37 is pressed by the cam at the tip, the roller 38 is moved to the fixed frame via the shaft 34 and the column 39. 11
can be moved by floating it off the concrete surface.

In addition, numeral 41 in the figure is a facing board attached to the upper part of the formwork 1.

In the above configuration, FIG. 6 shows the moving and fixing device 1.
0 anchor bolts 19, 19' are used to secure the lower layer of concrete C ₁ and C ₂ , and the upper layer of concrete C ₃ is poured.
Peel off the formwork 1 as shown in the figure. For this separation, first loosen the tightened jack bolts 8 and 32, remove the Siebold 6 of the movable end 3, and then loosen the fixing bolt 25 of the rocking movement means 20 for fixing the fixed end 2. In this state, the hydraulic jack 21 is extended and the guide frame 12 and fixed end thick 2 are lifted up via the hanging hardware 22, thereby peeling the formwork 1 from the concrete _C3 surface.

Next, when placing the upper layer of concrete, the hydraulic jack 13 is extended in the above state to extend the fixed end thick 2, and the formwork 1 is moved to the upper layer concrete placement position (No. 8 figure).
Then, the hydraulic jack 21 is contracted to lower the hanging hardware 22, the fixed end piece 2 is lowered together with the guide frame 12, the lower end of the formwork 1 is attached to the concrete surface _C3 , and the movable end member 3 is attached to the concrete surface _C3. It is fixed by screwing the Siebold 6 into the anchor buried in the (Fig. 9).

Next, remove the anchor bolt 19' fixing the rear part of the fixed frame 11 from the anchor A,
Loosen the front anchor bolt 19, raise the roller lever 35 to push the roller 38 below the fixed frame 11, and raise the lever 30 to lift the fixed frame 11 off the concrete surface.

This makes the fixed frame 11 movable, and by contracting the hydraulic cylinder 13, the fixed frame 11 moves upward to the concrete _C3 as shown in FIG. At this position, lever 3
0 and 35 to attach the fixed frame 11 to the concrete surfaces C ₂ and C ₃ , and then tightened the anchor bolts 19 and 19' into the anchor A through the elongated hole 17.
Fix it by.

Then, tighten the fixing bolt 25 to fix the fixed end thick 2, and operate the jack bolts 8 and 32 to re-pass the formwork 1 (angle adjustment), and attach the anchor A at the tip to the mounting hardware 5, 5'. Insert the dummy bolt 4 with attached.

After the formwork is set in this way, the upper layer of concrete _C4 is poured. Thereafter, the same steps as above are repeated to successively place concrete on the upper layer.

As described above, according to the present invention, the fixed end of the formwork is inserted into the guide frame loosely inserted into the fixed frame so as to be able to move forward and backward by a hydraulic cylinder, and the guide frame is connected vertically to the fixed frame at its rear end. Since it is attached so that it can swing freely in the width direction,
In response to the swinging operation of the guide frame, the fixed end piece can be swung together with the formwork, and its angle can also be freely adjusted.

The fixed frame is provided at its tip with a swinging means for swinging the guide frame using a hydraulic jack, and a jack bolt is screwed into the intermediate part of the guide frame so that the guide frame can be press-adjusted. By lifting or lowering the guide frame, the formwork can be easily and quickly moved into contact with and away from the concrete surface along with the fixed end thickness, and sufficient peeling space can be secured, and the guide frame can be adjusted by tightening the jack bolts. The angle of the guide frame is adjusted using the connecting portion of the swinging means at the tip of the frame as a fulcrum, thereby making it possible to easily adjust the angle of the formwork together with the fixed end.

Further, the fixed frame is provided with a fixing means that can press and fix the fixed end piece through the through hole provided in the guide frame, so that when the fixed end piece is extended, it can be kept fixed.

Therefore, according to the present invention, the formwork can be easily peeled off with a simple operation, a sufficient separation space can be secured, and the work of raising and installing the formwork and its angle adjustment can be easily performed. Further, since the present invention allows easy installation and removal of the formwork, it can be operated even by non-skilled workers, and can be operated by a small number of people. Furthermore, the present invention facilitates the raising operation of the formwork, so that it can shorten the process time for execution, and exhibits effects not found in conventional devices.

[Brief explanation of the drawing]

Figure 1 is a front view showing an embodiment of the invention, Figure 2 is a front view showing an embodiment of the invention.
The figure is a partially cutaway perspective view of the movable fixing device according to the present invention, FIG. 3 is a vertical cross-sectional view of the swinging means according to the present invention, and FIG. FIG. 5 is a longitudinal sectional view of a jack bolt portion according to the present invention, and FIGS. 6 to 10 are side views showing construction steps using the apparatus of this invention. 1... Formwork, 2... Fixed edge thickness, 11... Fixed frame, 12... Guide frame, 13... Hydraulic cylinder, 21... Hydraulic cylinder, 21'... Telescopic rod, 22... Hanging hardware, 23...Long hole, 24
... Pin, 25 ... Fixing bolt, 27 ... Clamping member, 28 ... Through hole, 29 ... Shaft, 30 ... Cam lever, 31 ... Pusher, 32 ... Jack bolt,
33... Bracket, 34... Shaft, 35... Cam lever, 36... Shaft, 37... Pusher, 38... Roller, 39... Support column, 40... Holding section.

Claims (1)

[Claims] 1. A hollow fixed frame for fixing to a concrete surface with bolts, a hollow guide frame that is loosely inserted into the fixed frame and whose rear part is pivoted to the fixed frame so as to be swingable in the longitudinal direction; a hydraulic cylinder that is inserted into a guide frame and whose rear end is pivotally connected to the fixed frame; a fixed end of the formwork whose rear end is attached to the tip of a telescopic rod of the hydraulic cylinder; a swinging movement means for raising and lowering the guide frame in the longitudinal width direction of the fixed frame via a hanging hardware by means of an installed hydraulic jack; A self-lifting formwork device comprising: a fixing means for crimping and fixing the fixed end thick through a through hole provided in the frame; and a jack bolt screwed into the fixed frame toward the intermediate portion of the guide frame.