JPH0736008Y2 - Concrete press fitting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a press-fitting device for placing concrete from the side of a formwork.

[Prior art]

Conventionally, in order to place concrete in a mold, a method of pouring concrete from above the mold is generally used. For example, pouring concrete for pillars and walls is done from above the slab formwork. However, such pouring from above tends to cause junkers at the feet of columns and walls, which is an important issue for quality control of concrete.

In order to solve such a problem, the applicant has a practical application as a device for press-fitting concrete from the lower side surface of the formwork.
The press-fitting device according to No. 21 is disclosed. In this press-fitting device, a pressure-feeding pipe containing a piston reciprocally moved by a jack and an injection pipe are connected to the side of the pressure-feeding pipe. The concrete sent from the injection pipe is pressed into the form by a piston.

[Problems to be solved by this device]

When pouring concrete into the formwork with such a press-fitting device, the concrete is placed from one side surface of the formwork, so if the formwork is thick, the press-fitting side inevitably rises and the facing side becomes low. . Therefore, it was difficult to press-fit evenly in the thickness direction of the mold.

In addition, if there are a large number of pouring holes on the top, bottom, left and right of the side surface of the formwork, connecting a hose for flowing concrete makes it difficult to work unless the hose orientation is free. In other words, troubles such as trouble and closing of the driving holes are likely to occur, resulting in poor press-fitting efficiency.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a concrete press-fitting device capable of uniformly placing concrete in the entire formwork.

Another object of the present invention is to provide a concrete press-fitting device that can be easily switched to a plurality of pouring holes and does not deteriorate the press-fitting efficiency.

[Means for Solving the Problems]

The concrete press-fitting device of this invention employs means for guiding concrete to the middle portion in the thickness direction of the form.

A piston, which can be press-fitted and moved by a jack, is housed in the pressure feed pipe. The jack that operates the piston may be a hydraulic cylinder or the like.

An injection pipe is connected to the side of the pressure feeding pipe, and the injection pipe and the pressure feeding pipe are continuous. Concrete is sent to the pumping pipe through the injection pipe.

This placing device is connected to the placing hole opened in the dam plate of the formwork. As the mold, a mold for constructing various structures such as walls and columns can be used.

A cylindrical introduction pipe is arranged in the mold, and the introduction pipe is detachably connected to the tip of the pressure feed pipe. The leading end of the introduction tube reaches the middle portion in the thickness direction of the mold. Various materials such as steel and plastic can be used as the material of the introduction tube, and fibers such as aramid fibers may be wound around the outer circumference of the steel.

It is preferable to connect a hose to the pouring pipe of the placing device via a rotatable connection tool and send concrete to the placing device. As a rotatable connector, one having a ball joint, a swivel joint, or the like can be considered. Further, a coupler having a screw or the like may be adopted as the connector. The hose may be connected to the injection tube using a bent tube, or a flexible hose may be used.

[Action]

When placing concrete, tighten the piston. The concrete sent from the pressure pump is the injection pipe-the pressure pipe-
It is guided to the middle portion in the thickness direction of the mold through the introduction pipe and is press-fitted into the mold. Since concrete is pressed into the mold from the middle part of the mold, the concrete is poured uniformly over the whole.

When the pouring of a specified amount of concrete from the pouring hole is completed, the piston is extended and the residual concrete in the pumping pipe is pushed into the formwork, and the pouring hole is closed by the tip of the piston, and the tip surface is a dam plate. Flush with the inner surface of the. Cure the concrete while maintaining the piston position. After the concrete has hardened, the pressure pipe is removed from the introduction pipe and the formwork. The lead-in pipe remains buried in the concrete.

Since the injection pipe is connected to the concrete pressure hose via a rotatable connection tool, the work of attaching and detaching the injection pipe and the concrete pressure hose can be performed in a place where there is no obstruction by the surrounding formwork, etc. It is possible to smoothly proceed with the work of switching the hose to each driving hole. Since it is easy to switch, it is possible to use a plurality of casting holes, the press-fitting work can be smoothly carried out without making the lateral pressure of the mold excessive, and the finish is also good.

〔Example〕

Hereinafter, the present invention will be described in detail based on the embodiments shown in the drawings.

In FIG. 1, reference numeral 1 is a driving device, and a cylindrical injection pipe 3 is also connected to the side of a cylindrical pressure feed pipe 2.
A piston 5, which can be reciprocated by a cylinder 4 which is a jack, is housed in the pressure feed pipe 2.

A collar 6 projects from the outer circumference of the tip of the pressure-feeding pipe 2. A cylindrical introduction pipe 7 is detachably attached to the collar 6 by a bolt. The introduction pipe 7 is attached so as to be continuous with the pressure feeding pipe 2. The introduction pipe 7 is formed with a plurality of holes 8 for venting water and air.

Such a placing device 1 is attached to the placing hole 9 opened in the dam plate 12 of the form. The collar 6 of the driving device 1 is brought into contact with the driving hole 9 to close it, and the introduction pipe 7 protruding from the pressure feeding pipe 2 is housed in the mold. At this time, the tip of the introduction pipe 7 reaches the middle portion in the thickness direction of the mold.

A bending pipe 11 is connected to the injection pipe 3 via a rotatable connecting tool 10. A ball joint mechanism is adopted as the connecting tool 10 so that it can be rotated and displaced by a predetermined angle. The bent pipe 11 is a pipe bent at a predetermined angle.
A hose that sends concrete to is connected.

The concrete placing work by the above press-fitting device will be described.

The piston 5 is in the retracted position. Hose and bent pipe 11
The concrete that has been sent via the above enters the pressurizing pipe 2 through the injection pipe 3, and is press-fitted into the form via the introducing pipe 7. Since the tip of the introduction pipe 7 is located at the middle portion in the thickness direction of the mold,
Concrete is poured uniformly in the thickness direction.

Concrete accumulates in order from the bottom of the form, but even if the top end is higher than the height of the casting hole 9, the concrete is being pumped by a pressure pump (not shown), so fill the form. become.

At the time when a predetermined amount of concrete has been poured from the casting hole 9, the piston 5 is extended to push the concrete remaining in the pressure feed pipe 2 into the form, and the tip of the piston 5 is moved to the inside of the weir plate 12. Be flush with the sides. In this state, the cylinder 4 is stopped to prevent the piston 5 from moving backward. Since the concrete hardens in this state, the concrete around the casting hole 9 does not have irregularities.

When the pouring of a predetermined amount of concrete is completed, the hose is removed from the bending pipe 11, and the hose is switched to the bending pipe 11 of the pouring device 1 attached to another pouring hole 9. Since the bending pipe 11 is connected to the driving device 1 through the rotatable connecting tool 10, the hose attachment / detachment work can be performed at a place without any obstruction, and the switching work can proceed smoothly.

After the concrete is hardened, the connecting bolt between the pressure feed pipe 2 and the introduction pipe 7 is removed, the placing device 1 is removed from the mold, and the mold is removed from the mold. The introduction pipe 7 remains buried in the concrete.

2 and 3 show another embodiment, in which the connector 10
A threaded insertion tube or coupler is used as the injection tube 3 and the bending tube 11 are rotatable by a threaded portion.

[Effect of device]

The present invention has the above-mentioned configuration and can obtain the following effects.

(A) Since the tip of the introduction pipe arranged in the mold reaches the middle portion in the thickness direction of the mold, the concrete can be uniformly filled in the thickness direction.

(B) By extending the piston to close the driving hole, and the piston surface is flush with the inner surface of the dam plate,
No unevenness occurs on the concrete surface, and no post repair is required.

(C) Since the rotatable connection tool is interposed between the injection pipe and the hose connection part, the work of attaching and detaching the injection pipe and the hose can be performed in a place not disturbed by the surrounding formwork. It is possible to smoothly proceed with the work of switching the hose to each driving hole. Since it is easy to switch, it is possible to use a plurality of casting holes, the press-fitting work can be smoothly carried out without making the lateral pressure of the mold excessive, and the finish is also good.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the concrete press-fitting device according to the present invention, and FIGS. 2 and 3 are sectional views of other embodiments. 1 ... Placing device, 2 ... Pumping pipe, 3 ... Injection pipe, 4 ...
Cylinder, 5 ... Piston, 6 ... Tsuba, 7 ... Introduction tube,
8 ... hole, 9 ... casting hole, 10 ... connector, 11 ... curved pipe.

Claims (2)

[Scope of utility model registration request] 1. A placing hole, which is formed on a weir plate of a form, with a placing device including a pressure feeding pipe accommodating a piston press-fittable by a jack and an injection pipe connected to the side of the pressure feeding pipe. A cylindrical introduction pipe was placed inside the formwork and was detachably connected to the tip of the pressure feed pipe, and the tip of the introduction pipe was extended to the middle portion in the thickness direction of the formwork. Concrete press-fitting device. 2. A placing device comprising a pressure feed pipe accommodating a piston that can be press-fitted and moved by a jack, and an injection pipe connected to the side of the pressure feed pipe via a connecting tool rotatable to the injection pipe. The hose and the casting hole opened in the dam plate of the form, and a cylindrical introduction pipe is placed inside the form and detachably connected to the tip of the pumping pipe. A concrete press-fitting device characterized in that the tip of the pipe reaches the middle portion in the thickness direction of the form.