JPH0749711B2 - Form clamping device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a mold clamping device.

[Prior art and its problems]

For example, in concrete dams, spillways of rock fill dams, caisson, coastal construction, marine construction, etc., concrete pouring is carried out in stages. For example, as shown in FIG. The formwork 1 is fastened to the anchor bolts 3 embedded in the existing concrete 2 via the sea bolts 4, and the formwork 1 is made by the jack bolts 5.
The formwork 1 is set up according to the procedure of adjusting the posture of
Another anchor bolt 3 supported via a dummy bolt 6 is embedded in the concrete to be cast next to solidify the concrete, and then the dummy bolt 6 and the sea bolt 4 are removed when the formwork 1 is removed. The procedure of disassembling from the anchor bolt 3 and removing the formwork 1 is repeated.

Conventionally, the anchor bolt 3 and the dummy bolt 6 or the sea bolt 4 are connected by a screw structure. That is,
As shown in FIG. 5, a male screw 7 is formed at the tip of the anchor bolt 3, and a female screw 8 that is screwed to the male screw 7 is formed at the tip of the dummy bolt 6 (or the seabolt 4). Alternatively, the anchor bolt 3 and the dummy bolt 6 (or the sea bolt 4) are joined or disassembled by screwing the sea bolt 4).

However, when pouring concrete, mortar (concrete) may infiltrate and solidify between the male screw 7 of the anchor bolt 3 and the female screw 8 of the dummy bolt 6, and in such a case, it is very strong. If you do not turn the dummy bolt by force, replace the dummy bolt 6 with the anchor bolt 3
Can no longer be disassembled. In addition, solidified concrete remains on the surface of the male screw 7 of the anchor bolt 3 from which the dummy bolt 6 has been removed, or mortar is attached to the male screw 7 of the anchor bolt 3 from which the dummy bolt 6 has been removed during concrete pouring work at other locations. May adhere, and in such a case, it is necessary to screw the seabolt 4 with a very strong force to connect the seabolt 4 to the anchor bolt 3, and sometimes the seabolt 4 cannot be connected. is there.

Further, in the case of dam form work, as the concrete pouring progresses in stages, the work of attaching and detaching the form 1 becomes work at a high place, and as described above, the dummy bolt 6 and the sea bolt 4 are pushed by a strong force. The operation of screwing is not preferable for improving safety.

The present invention has been proposed in view of the above circumstances,
It is an object of the present invention to provide a mold clamping device capable of safely and quickly connecting and disassembling a dummy bolt or a sea bolt to an anchor bolt.

Further, in addition to the above first object, the present invention has a second object to provide a mold clamping device capable of reducing energy consumption during mold clamping.

[Means for solving problems]

The mold clamping device according to the present invention employs the following means in order to achieve the above object. That is, it is a form clamp device for tightening the form frame to the anchor bolt embedded in the existing concrete through the sea bolt, and first, at the tip of the anchor bolt, there is a hook-shaped engaging portion for engaging the sea bolt. A divergent case covering the engagement portion is provided, and a hook-shaped engagement portion that engages with the engagement portion of the anchor bolt is formed at the tip of the sea bolt, and the sea bolt is engaged with the anchor bolt. A wedge that enters the case along the seabolt and fixes the anchor bolt and the seabolt in an engaged state is provided along the circumferential surface of the seabolt so as to be able to advance and retract in the axial direction.

Then, while the middle portion of the seabolt is slidably supported by the formwork and the base end portion of the seabolt is swingably supported via a swing support device, the wedge is advanced and retracted with respect to the seabolt. A drive device is provided.

Further, in addition to the above structure, a fixing means is provided for fixing the wedge to a working position where the wedge fixes the anchor bolt and the sea bolt in an engaged state.

[Action]

The mold clamping device according to the present invention, the mold is located at a position where the anchor bolt and the sea bolt in the existing concrete are opposed to each other, the sea bolt is directed in a predetermined direction by the swing support device, The sea bolt is advanced to the anchor bolt side, and the tip of the sea bolt is inserted into the case at the tip of the anchor bolt to engage the engaging portion of the anchor bolt and the engaging portion of the sea bolt, and further, the wedge is driven by the advancing / retreating drive device. After entering the case, and by fixing the wedge to the working position where the anchor bolt and the sea bolt are fixed in a combined state by the fixing means, it is necessary to carry out manual labor when mounting the sea bolt and the dummy bolt, and The danger can be eliminated.

〔Example〕

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a side view of a mold clamping device according to an embodiment of the present invention, FIG. 2 is a front view thereof, and FIGS. 3 (1) to 3 (6) show anchor bolts thereof. It is a schematic diagram which shows the connection procedure of the Siebold to.

Here, a cantilever slide form is used as a formwork.
10 is used. In this slide form 10, a plurality of barrier plates 32 are arranged flush with each other and connected to horizontal flaps 33 arranged at appropriate intervals in the vertical direction, and each horizontal flap 33 is provided at appropriate intervals in the horizontal direction. It is connected to the arranged vertical flap 18, and is configured to be lifted by a crane (not shown) or the like and to be connected to the anchor bolt 11 embedded in the existing concrete 2 via the sea bolt 12,
The inclination of the jack bolt 5 can be adjusted.

At the tip of the anchor bolt 11, a hook-shaped engaging portion 13 for engaging the sea bolt 12 is formed, and the engaging portion
A flared case 14 is provided to cover 13.

In addition, an anchor bolt is attached to the tip of the sea bolt 12.
A hook-shaped engaging portion 15 that meshes with the engaging portion 13 of 11 is formed. Further, the sea bolt 12 is provided with a wedge 16 for fixing the anchor bolt 11 and the sea bolt 12 in an engaged state so as to be movable along the peripheral surface of the sea bolt 12 in the axial direction of the sea bolt 12.

The rear end of the Siebold 12 is supported by the vertical flap 18 of the slide form 10 via a swing support device 17, and an intermediate portion thereof is slidable on a support plate 19 installed between a pair of vertical flaps 18. It is supported.

The swing support device 17 includes a support rod 20 which is swingably supported by the vertical flap 18, and a swing drive cylinder 21 which swings the support rod 20. An intermediate portion of the support rod 20 is pivotally supported by the vertical flap 18, and a swing drive cylinder 21 is mounted between the free end portion of the upper end of the support rod 20 and the vertical flap 18. At the lower end of the support rod 20, a tubular shape 24 of an advancing / retreating drive cylinder 22 composed of a backward hydraulic cylinder is swingably supported via a hanging rod 20 '. The hanging rod 20 'and the support rod 20 are connected so as not to form a dogleg shape, although an inverted dogleg condition can be formed. Further, the piston rod 23 of the cylinder 22 and the sea bolt 12 are formed in an integral shaft shape.

A hydraulic cylinder is used as the swing drive cylinder 21 and the forward / backward drive cylinder 22, but a pneumatic cylinder,
It is possible to use an electric cylinder or the like. Further, as shown in FIGS. 3 (1) to 3 (5), the Siebold 12
In order to make the engaging portion 13 of the anchor bolt 11 and the engaging portion 15 of the sea bolt 12 mesh with each other when being advanced to a predetermined position, the recess 23 is formed in the lower surface portion of the sea bolt 12 in sliding contact with the support plate 19. Is formed.

The cylinder 24 of the advance / retreat drive cylinder 22 is a piston rod 25.
Also, the rear end of the wedge 16 is pushed out in the front end direction via a seat plate 26 slidably fitted on the sea bolt 12. The rear end of the wedge 16 is fixed to the seat plate 26, and is driven backward by the return spring 27 (FIG. 1) against the forward / backward drive cylinder 22.

This form clamping device is provided with fixing means 28 for fixing the wedge 16 in an operating position where it fixes the anchor bolt 11 and the sea bolt 12 in the engaged state.

This fixing means 28 is a slit formed in the seabolt 12.
29 and a wedge-shaped fixture 30 that is inserted into and removed from the slit 29 to receive the rear surface of the seat plate 26 that has advanced to the operating position.
And a fixture driving cylinder 31 that drives the fixture 30 forward and backward.
It has and. As the fixture driving cylinder 31, a hydraulic cylinder, a pneumatic cylinder, an electric cylinder, or the like is used. Further, here, the fixture driving cylinder 31 is constituted by a double-acting cylinder, but it may be constituted by a single-acting cylinder having a built-in automatic return spring.

A dummy bolt 34 is supported above the vertical flap 18 of the slide form 10 via another swing support device 17. The dummy bolt 34 is formed in the same manner as the sea bolt 12, and is engaged with the anchor bolt 3 embedded in the concrete to be subsequently poured. The wedge 36 for fixing the dummy bolt 34 and the anchor bolt 3 in the engaged state is driven forward / backward by another forward / backward drive device 22 and the return spring 27 via the seat plate 26 similarly to the wedge 16 of the seabolt 12. It has become so.

Further, a pressure oil supply source (not shown) and a drive control device (not shown) for supplying pressure oil to the cylinders 21, 22, 31 are slide forms.
It is mounted on a scaffold 35 connected to the bottom of 10.

Next, the procedure for clamping the mold by this mold clamping device will be described with reference to FIGS. 1 (1) to 3 (6).

The slide form 10 is suspended by a crane or the like (not shown) so as to be positioned at a position where the anchor bolt 11 and the sea bolt 12 in the existing concrete 2 face each other, and as shown in FIG. By pulling the rocking drive cylinder 21, as shown in FIG. 3 (1), the direction of the sea bolt 12 is oriented substantially parallel to the tip of the anchor bolt 11.
Next, the advancing / retreating drive cylinder 22 is operated against the pressing force of the rocking drive cylinder 21 (at this time, the hanging rod 20 'is linear with respect to the support rod 20 as shown in FIG. As shown in FIG. 3 (2), the sea bolt 12 is advanced to the anchor bolt 11 side, and the engaging portion 15 at the tip thereof is inserted into the case 14 at the tip of the anchor bolt 11. The engaging portion 15 of the sea bolt 11 and the engaging portion 13 of the anchor bolt 3 are
When the seabolt 12 is inserted into the case to a position where it can be engaged, the support plate 19 comes to support the recess 23 of the seabolt 12, and the seabolt 12 swings by its own weight,
The engaging portion 15 of 11 and the engaging portion 13 of the anchor bolt 3 are engaged with each other.

After engaging the engaging portion 13 of the anchor bolt 11 and the engaging portion 15 of the sea bolt 12 in this manner, the advancing / retreating drive cylinder 22 is resisted against the spring 27 as shown in FIG. 3 (3). The wedge 16 into the case 14 via the tubular shape 24 and the seat plate 26, and the wedge 16 is moved to the case 14 and the sea bolt.
The anchor bolt 11 and the sea bolt 12 are fixed to each other by being bitten between the anchor bolt 11 and the sea bolt 12. Then, as shown in FIG. 3 (4), the fixture driving cylinder 31 of the fixing means 28 is extended to insert the fixture 30 into the slit 29 formed in the seabolt 12 to fix the wedge 16 to the working position. To do. In this way, the wedge 16 is fixed in the working position. In this way, after the wedge 16 is fixed in the working position, the cylinders 21 and 22 other than the fixture driving cylinder 31 can be set in a free state to reduce the load on the drive source and reduce energy consumption. .

When the concrete cast on the upper side of the existing concrete 2 is solidified to some extent, the slide bolt 10 can be suspended by a crane and the sea bolt 12 can be removed by the following procedure.

That is, first, the fixture driving cylinder 31 is operated in the reverse direction to extract the fixture 30 from the slit 29, the advancing / retreating drive cylinder 22 is operated, and the return spring 26 wedges the wedge.
Remove 16 from case 14. At this time, since the swing drive cylinder 21 is in the free state, the rear end of the advance / retreat drive cylinder 22 is lowered by its own weight, and conversely the tip of the seabolt 12 is lifted as shown in FIG. 3 (5). As a result, the engagement between the two engaging portions 13 and 15 is released. Next, the forward / backward drive cylinder 22
To move the Siebold 12 forward and backward
By pulling it toward the 22 side, the Siebold 12 moves to the case 14
Pulled from. The dummy bolt 34 is also removed from the case in the same manner.
The slide form 10 is removed from the concrete by releasing the connection between the 11 and the sea bolt 12 (or the dummy bolt 34).

Although the cantilever type slide form 10 is used as the form in the above description, the form clamp device according to the present invention can be applied to a non-cantilever type slide form or an ordinary form.

Further, although only the case where the fixing means 28 is used has been described, the fixing means 28 can be omitted if the pressures of the forward / backward drive cylinder 22 and the swing drive cylinder 21 can be maintained for a long period of time.

〔The invention's effect〕

As described above, according to the mold clamping device of the present invention, the anchor bolt and the sea bolt are not coupled by screws, but the hook-shaped engaging portion is engaged and the coupled state is fixed by a wedge. Since it can be released, the connection between the anchor bolt and the sea bolt and the release of the connection can be performed easily and quickly. Also, since the connection and disconnection of the anchor bolt and the sea bolt are mechanically processed by the bolt drive device and the wedge drive device, it is not necessary for the worker to operate the sea bolt and the anchor bolt with a strong force. , Which is extremely advantageous in improving safety.

[Brief description of drawings]

FIG. 1 is a side view of a mold clamping device according to an embodiment of the present invention, FIG. 2 is a front view thereof, and FIGS. 3 (1) to 3 (6).
Fig. 4 is a schematic view showing in sequence the procedure for connecting the anchor bolt to the seabolt, Fig. 4 is a side view of a conventional mold clamping device, and Fig. 5
The figure is a side view showing a conventional joint structure of an anchor bolt and a sea bolt. In the figure, 10 …… Slide form, 11 …… Anchor bolt, 12…
… Sea bolt, 13 …… engagement part, 14 …… case, 15 …… engagement part, 16 …… wedge, 21 …… swing drive cylinder, 22 ……
Forward / backward drive cylinder, 27 ...... Fixing means.

Claims (2)

[Claims] 1. A formwork tightening device for tightening a formwork to an anchor bolt embedded in an existing concrete through a seabolt, wherein a hook-shaped engaging portion for engaging the seabolt at a tip end portion of the anchor bolt. And a flared case that covers the engagement portion, and the sea bolt is formed with a hook-shaped engagement portion that engages with the engagement portion of the anchor bolt at the tip of the sea bolt, and the sea bolt engaged with the anchor bolt. A wedge that enters the case and locks the anchor bolt and the sea bolt in an engaged state is provided along the peripheral surface of the sea bolt opposite to the engaging portion of the sea bolt so as to be able to advance and retreat in the axial direction. , The middle part of the seabolt is slidably supported on the formwork, and the base end of the seabolt is rockably supported by a rocking supporting device, while the wedge is supported on the seabolt. A reciprocating drive device for advancing and retracting, the wedge, which is the mold with frame clamping device, characterized in that provided with fixing means for fixing the working position for fixing the anchor bolt and Siebold in engagement. 2. A formwork tightening device for tightening a formwork to an anchor bolt embedded in an existing concrete through a seabolt, wherein a hook-shaped engaging portion for engaging the seabolt at a tip end portion of the anchor bolt. And a case that expands to cover the engagement portion, and the sea bolt is formed with a hook-shaped engagement portion that engages with the engagement portion of the anchor bolt at the tip of the sea bolt, and the sea bolt engaged with the anchor bolt. A wedge that enters into the case and fixes the anchor bolt and the sea bolt in an engaged state is provided along the peripheral surface of the sea bolt opposite to the engaging portion of the sea bolt so as to be able to advance and retreat in the axial direction. , The middle part of the seabolt is slidably supported by the mold, and the base end of the seabolt is rockably supported by a rocking support device, while the wedge is attached to the seabolt. Mold with frame clamping device, characterized in that provided a reciprocating drive device for advancing and retracting.