JPH0447095B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Field of Industrial Application This invention relates to a device that automatically fixes and demolds a formwork for pouring concrete.

(2) Conventional technology Conventionally, when setting a formwork for pouring concrete, the formwork was attached to fixed anchor bolts by tightening nuts, and the concrete was poured.

(3) Problems to be solved by the invention In the conventional case, when fixing and demolding the formwork, there were many rotating parts such as tightening bolts and nuts and heating, which resulted in poor work efficiency and poor safety. There was an inferior problem.

SUMMARY OF THE INVENTION An object of the present invention is to provide an apparatus that can automatically fix and demold concrete formwork, and can perform construction of formwork at several locations simultaneously in an efficient and safe manner.

(4) Means for solving the problem In order to achieve this object, the present invention has a cylindrical shape with a through hole in the center, and an anchor inserted into the through hole at the tip of the through hole. a holder protrudingly provided with an engaging protrusion that engages with an engaging portion of the root of the bar; a pressing means for pressing the anchor bar in a direction to push out the anchor bar provided on the root side of the through hole; and a pressure sensor that operates when the anchor bar is pressed by the pressing means and the engaging portion is pressed and fixed to the engaging protrusion, and the holder is provided in the form frame so as to be rotatable forward and backward. It is characterized by

(5) Action Insert the anchor bar having the engaging portion from the engaging convex side of the holder, and after it is fully inserted, rotate the anchor bar by a certain angle.

As a result of this rotation, the engagement protrusion of the holder, the anchor bar, and the engagement part come into contact with each other, and the engagement part is pressed and locked by the pressing means provided in the base of the holder, and this pressing is applied to the end of the pressing means. It is sensed by a pressure sensor installed in the anchor bar and can be confirmed outside the fixation of the anchor bar.

After the poured concrete has hardened, the holder is rotated by a certain angle, whereby the engaging protrusion of the holder and the engaging portion of the anchor bar are disengaged.

Then, by activating the advancing/retracting device, the holder is moved backward and detached from the anchor bar.

(6) Embodiment An embodiment of the present invention will be described with reference to FIGS. 1 to 4.

1 indicates a formwork, and frames 1a, 1 of the formwork 1
A holding cylinder 2 was fixed between the spaces a, and the holder 3 was inserted through the cylinder 2 and a through hole in the weir plate 1b of the formwork 1 so that it could move forward and backward and rotate freely. Here, the holder 3 has a cylindrical shape with a pointed tip, and has a through hole 3a in its center, and protrusions 3b, 3b are formed on the tip side of the through hole 3a as shown in FIG. There is.

A slip ring 4 is provided on the outside of the root of the holder 3 and is loosely fitted into the holder 3. A rod portion of a detachable jack 5 for advancing and retracting the holder 3 is connected to the spring 4, and a cylinder portion is connected to the frame 1a. There is. Further, a cylinder portion of a rotary jack 7 for rotating the holder 3 is pivotally connected to a shaft between a pair of arms 6, 6 protruding from the slip ring 4, and a cylinder portion of a rotary jack 7 for rotating the holder 3 is pivotally connected to a shaft between a pair of arms 6, 6 protruding from the slip ring 4. The tip of the rod portion of the rotary jack 7 is pivotally attached to the shaft between the arms 8, 8.

Further, in the through hole 3a of the holder 3, a pressing body 9 and a spring 10 for pressing the anchor bar 13 in the direction of pushing out are provided, and a plug 12 at the tail end of the through hole 3a is provided with a pressing body 9 and a spring 10. A pressure sensor 11 that senses pressure is fixed.

A protrusion 3c is provided in the middle of the through hole 3a of the holder 3 to prevent the pressing member 9 from moving forward by excessive pressure. Further, the anchor bar 13 used in this embodiment device has its tip bent in an L-shape,
Engagement parts 13a, 13a whose roots can be fitted into and engaged with the protrusions 3b, 3b on the distal end side of the holder 3 are formed, and a stopper ring 14 is fitted in the intermediate part.

The formwork 1, in which the above-mentioned attachment/detachment devices are arranged vertically and horizontally at predetermined intervals, is set in a predetermined position, and the engaging portions 13a, 13a of the anchor bar 13 are connected to the tip protrusions 3b, 3b of the holder 3. The anchor bar 13 is inserted until the stopper ring 14 comes into contact with the front end surface of the holder 3. After the insertion is completed, the anchor bar 13 is rotated by a certain angle.

As a result, the engaging portion 13a of the anchor bar 13 comes into contact with the protrusion 3b of the holder 3, and the spring 10
The pressing body 9 pressed by the holder 3
The engaging portion 13 of the anchor bar 13 is inserted into the through hole 3a of the
The anchor bar 13 is fixed by pressing and fixing the anchor bar 13. This inserted state is the tail end plug 1 of the holder 3.
The pressure sensor 11 provided at 2 is used for sensing and confirmation from the outside.

Therefore, when the detachable jack 5 is operated, the cylinder of the detachable jack 5 is fixed to the form frame 1a and its rod is connected to the slip ring 4, so the holder 3 moves inside the cylinder 2 and advances to a predetermined position. Stop.

Then concrete will be poured.

Rotating jack 7 after the concrete has hardened
Activate. The rod of the rotating jack 7 is fixed by the holder 3, and the cinder is connected to the slip ring 4 via the arms 6, 6, and the slip ring 4 is connected to the rod of the detachable jack 5. 5 is fixed to the form frames 1a, 1a, so by rotating the rotary jack 7 by a certain angle, the tip can be turned to L.
Engagement parts 13a, 13a of anchor bar 13 bent in a letter shape and fixed to concrete and holder 3
The engagement with the protrusions 3b, 3b is in a disengaged state.

Next, by operating the attachment/detachment jack 5, the holder 3 is moved backward and detached from the anchor bar 13, and the formwork 1 is removed from the mold.

Therefore, the formwork 1 is raised to a predetermined height, and the formwork 1 is set in the next position by gripping the anchor bar 13, which is fixed to the already hardened concrete using a detachment device installed below the formwork 1. Then, the anchor bar 13 is attached and fixed to the attachment/detachment position of the upper device of the formwork 1 in the same manner as described above. Repeat the above method and pour concrete upwards in sequence.

FIG. 5 shows another embodiment, and the protrusions 3b, 3 have an elliptical opening in the through hole 3a on the distal end side of the holder 3.
The holder 3 is not limited to this.
The distal end portion can be arbitrarily formed into various shapes.

(7) Effects of the Invention As described above, according to the attachment/detachment device of the present invention, when setting a formwork for pouring concrete, the holder is cylindrical and has a through hole in the center and an engagement protrusion at the tip. An anchor bar can be inserted into the mold and held by a pressing means, and the holding can be detected by a sensor, so it is possible to automatically attach and detach the formwork, and it is also possible to attach and detach multiple places at the same time, which is highly safe. , it has a great economic effect.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view of the present invention, Fig. 2 is a plan sectional view, Fig. 3 is a perspective view of the tip of the holder, Fig. 4 is an enlarged perspective view thereof, and Fig. 5 is an enlarged holder of another embodiment. FIG. 1... Formwork, 3... Holder, 3a... Through hole, 3b... Engaging protrusion, 9, 10... Pressing means,
11...Pressure sensor, 13...Anchor bar.

Claims (1)

[Claims] 1 It has a cylindrical shape and has a through hole in its center, and an engaging protrusion is provided at the tip of the through hole to engage with the engaging part of the root of the anchor bar inserted into the through hole. a holder; a pressing means provided on the root side of the through hole for pressing the anchor bar in a direction to push it out; and a pressing means provided on the pressing means so that the pressing means presses the anchor bar so that the engaging portion is pressed against the engaging protrusion. 1. An anchor bar attachment/detachment device comprising a pressure sensor which is activated when the anchor bar is fixed by pressure contact, and the holder is provided on a mold crushing frame so as to be rotatable forward and backward.