JPH0765394B2 - Mortar injection device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a mortar injection device used in prepacked construction, marine platform prepacked construction, and the like.

[Conventional technology]

Conventionally, what is shown in FIG. 3 is known as a means for injecting mortar into the clearance of the aggregate packed in the mold.

That is, as shown in FIG. 3, first, the peripheral wall 2a is formed in the mold 1.
After installing the pipe 2 having a large number of holes 2b in the
The aggregate 3 is packed inside. Next, a large number of injection pipes 4 formed of steel pipes of a fixed length are connected and inserted into the pipe 2. Next, the mortar 5 is discharged from the tip of the injection pipe 4,
The mortar 5 is injected through the hole 2b of the pipe 2 from the lowermost part so that air is not mixed in the clearance between the aggregates 3. When the injection height of the mortar reaches a predetermined level during the injection, the injection is stopped and the connected injection pipe 4 is moved to the arrow P.
By pulling a certain amount in the direction, and removing the injection pipe 4 by a length corresponding to the pulled height. Next, the mortar 4 is discharged from the tip of the injection pipe 4 to inject the mortar into the gap between the aggregates. As described above, the mortar 5 is injected from the lowermost part to the uppermost part while repeating the injection of the mortar and the pulling up and removal of the injection pipe 4.

[Problems to be solved by the invention]

By the way, in the above-mentioned conventional means for injecting the mortar 5 into the gap between the aggregates 3, the injection pipe 4 has to be pulled up and removed every time the mortar 5 is injected up to a predetermined height, which is inefficient. There was a problem. Also,
There is a problem in that a lifting machine for pulling up the injection pipe 4 is required and a wide space for placing the injection pipe 4 is required.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a mortar injecting device that has good construction efficiency and does not require any other supporting machine and can be constructed even in a narrow space.

[Means for solving problems]

The present invention is directed to a pipe having a large number of holes in its peripheral wall, which are inserted so as to extend vertically by dividing an aggregate, a flexible tube inserted into the pipe, and a winder for raising and lowering the tube. And is provided.

Furthermore, a cable for detecting the injection height of the mortar can be wound around the winder.

〔Example〕

1 and 2 are views showing an embodiment of the present invention. In FIG. 1, reference numeral 6 is a mortar injection device. The mortar injection device 6 includes a pipe 7 and a winder 9.
, Drive unit 10, tube 11, mortar position detection unit 12
It consists of and.

The pipe 7 is a long steel pipe having many holes 13 in the peripheral wall portion. The pipe 7 is installed so as to extend in the vertical direction in the mold 14 formed of the steel shell 14a.

The winder 9 comprises a reel portion 15 and a swivel joint 16. The reel unit 15 has a shaft as shown in FIG.
17, a reel 18 whose center of rotation is fixed to the shaft 17, and support plates 19, 19 which rotatably support both ends of the shaft 17. The reel 18 is formed by coaxially connecting a tube take-up reel 18a and a cable take-up reel 18b. The swivel joint 16 is a hollow joint formed by rotatably connecting a suction port 16a and a discharge port (not shown). The suction port 16a side is fixed to the support plate 19, and the discharge port side is a shaft. It is fixed at the end of 18.

The drive unit 10 is composed of an electric motor 10a and a speed reducer 10b, and is connected to the reel 18 via a chain 20.

The winder 9 and the drive unit 10 are fixed on the base 21 and installed on the upper portion of the steel shell 14a.

The tube 11 is formed of a flexible material into a tubular shape. On the outer periphery near the tip of this tube 11,
A cylindrical packer 11a is fitted and fixed.

The tube 11 is wound around a tube take-up reel 18a, the packing side of the packer 11a is suspended inside the pipe 7, and the end of the taken-up side is swivel joint 16 inside the tube take-up reel 18a. Of the discharge port (not shown).

The mortar position detection unit 12 is composed of a cable 23, an electrode type level detector 24 attached to one end of the cable 23, and an encoder 26 attached to a bracket 25 fixed to the upper portion of the support plate 19. is there. A guide roller 27 is attached to the rotary shaft of the encoder 26. In the mortar position detecting unit 12, one end of the cable 23 is wound on the cable winding reel 18b, and the level detector 24 at the other end is
The side is suspended in the pipe 8 via the guide roller 27. The pipe 8 has a hole 13 in the peripheral wall,
It is installed in the formwork 14 so as to extend vertically. In FIG. 1, reference numeral 28 is a pipe connecting a mortar supply portion (not shown) and the suction port portion 16a of the swivel joint 16, and reference numeral 3 is an aggregate filled in the mold 14. The reference numeral 5 is a mortar filled in the clearance between the aggregates 3.

When the foundation of the marine platform is constructed by the mortar injection device 6 having the above structure, the following procedure is performed.

First, the mold 14 is constructed by the steel shell 14a over the bottom surface and the side surface.

Next, after installing the pipes 7 and 8 at predetermined positions in the mold 14 so as to extend vertically from the lowermost part to the uppermost part, the aggregate 3 is packed in the same mold 14 .

Next, the steel shell 14a is installed on the upper surface of the mold 14 to close the mold 14. However, a hole for removing air is provided on the upper surface of the mold 14.

Then, the winder 9, the drive unit 10 and the like are installed on the upper surface steel shell 14a of the mold 14.

Next, the tube 11 and the cable 23 are connected to the pipe 7 respectively.
And 8 and insert the tip of tube 11 and cable 23
The level detector 24 at the tip of is installed at a predetermined position.

Next, the mortar 5 is supplied from a mortar supply unit (not shown) through the pipe 28, the swivel joint 16 and the tube 11. The mortar 5 is supplied from the bottom of the mold 14,
It is injected into the gap between the aggregates 3 through the holes 13 of the pipe 7. At this time, the tip of the tube 11 is set to be immersed in the injected mortar 5 by a predetermined amount or more in order to prevent air from being mixed into the mortar 5. The mortar 5, which rises by backflowing in the pipe 7 during injection, is prevented from rising by the packer 11a.

Next, when the mortar 5 is injected to a predetermined position, the level detector 24 detects the position of the mortar 5 and emits a signal.
This signal causes the electric motor 10a of the drive unit 10 to rotate, and the reel 18 of the winder 9 to rotate via the chain 20. As a result, the tube 11 and the cable 23 are wound around the reel 18, and the tip of the tube 11 and the level detector 24 are raised. The tip of the tube 11 and the amount of rise of the level detector 24 are detected by an encoder 26 equipped with a guide roll 27 that rotates in contact with the cable 23. When a predetermined amount of increase is reached, a signal from a counter (not shown) counting the pulse signal of the encoder 26 is used to drive the driving unit 10.
Electric motor 10a stops, tube 11 and cable 2
Winding of 3 stops. While the tube 11 is being wound, the mortar 5 is being injected from the tip of the tube 11.

Next, when the mortar 5 is filled up to the predetermined position again,
The electric motor 10a operates to wind the tube 11 and the cable 23.

As described above, the mortar 5 is injected into the clearance between the aggregates 3 from the lowermost part to the uppermost part in the mold 14 while repeating the winding of the tube 11 at a certain interval.

By the above, the foundation of the marine platform is constructed.
However, in an actual marine platform, a large number of formwork 14 as described above are combined and constructed, and the same construction as described above is repeated for each formwork 14 ...

According to the mortar injecting device 6 having the above structure, the mortar 5 is continuously wound between the aggregates 3 while automatically winding the tube 11.
Since it is possible to inject, it is possible to significantly improve the construction efficiency, reduce the number of personnel required for construction work, and shorten the construction period. Further, since it is possible to continuously and automatically inject, it is possible to administer a large number of automatic mortar injecting devices 6 at the same time and inject into a large number of places. Furthermore, since the device itself is unitized, it has good mobility and can be installed immediately if installed. Furthermore, since the space for the injection pipe 4 which is required in the conventional injection means is not required and the lifting machine is not required, construction can be performed even if the work site is narrower than in the past.

〔The invention's effect〕

According to the present invention, a pipe having a large number of holes in a peripheral wall inserted so as to vertically extend by dividing the aggregate into a predetermined space, and a flexible tube inserted in the pipe, Since this tube was equipped with a winder, the mortar was discharged from the tip of the tube to inject the mortar into the gap between the aggregates, and the tube was wound up according to the injection height of the mortar to lower the tube from the bottom. Mortar can be continuously and efficiently injected into the gap between the aggregates up to the upper part. Therefore, the work of removing the injection pipe, which is required in the conventional mortar injection means, becomes unnecessary, the work efficiency is significantly improved, and the number of personnel required for the construction work and the work period can be shortened.
Moreover, since the place for the injection pipe, which is required in the conventional injection means, is not required and the lifting machine is not required, the construction can be performed even when the work site is narrower than the conventional work site. further,
Since the device itself is unitized, it can be installed immediately if it is installed with good mobility.

[Brief description of drawings]

FIG. 1 is a front view of a mortar injecting apparatus shown as an embodiment of the present invention, FIG. 2 is a right side view of an essential part of the mortar injecting apparatus, and FIG. 3 is a conceptual view showing a conventional mortar injecting means. . 3 ... aggregate, 5 ... mortar, 7 ... pipe, 9 ... winder, 11 ... tube.

Claims (3)

[Claims] 1. A device for injecting mortar into a clearance of an aggregate that is previously packed in a predetermined space, wherein the aggregate is separately inserted so as to extend vertically to form a large number of holes in a peripheral wall. A mortar injecting device comprising: the pipe, a flexible tube inserted into the pipe, and a winder for raising and lowering the tube. 2. The mortar pouring apparatus according to claim 1, wherein a cable for detecting the height of mortar pouring is wound around the winder. 3. The mortar pouring apparatus according to claim 2, wherein the tube is automatically wound according to the detected value of the height of the mortar pouring.