JPH07158274A - Concrete placing device - Google Patents

Abstract

PURPOSE:To prevent the formation of an useless projection on a structure surface at the time of removing a form after concrete curing and solidification, and improve placing workability. CONSTITUTION:A discharge pipe 10 which is a concrete charging means is mounted on an injection port 2 opened in a form 1 in such a manner as to be attachable and detachable from the outside. The discharge pipe 10 is formed into a forked pipe shape consisting of a straight pipe 11 and a branched pipe 13 branched from the course of the straight pipe 11 through a communicating hole 12, and a force-feed pipe 3 from a concrete supplying source is connected to the opening end part 13a of the branched pipe 13 which is a force-feed port. A shielding piece body 15 capable of being slid in the watertightly press-fitted state toward the discharge port 10a is provided on the other end opening part 11b side in the straight pipe 11, and a pushing mechanism 20 is provided on the shielding piece body 15 in such a manner as to be removable from the outside of the straight pipe 11. With this pushing mechanism 20, the shielding piece body 15 can be slid to the opening position B of the communicating hole 12 at force feeding concrete, and also slid to and stopped in the protruding end surface of the discharge port 10a of the discharge pipe 10 opposed to the inner part of the form 1 and the blocking shielding position C of the communicating hole 12 after placing the concrete in the form 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete pouring device used for pouring and pouring ready-mixed concrete (including mortar) into a construction mold for constructing a concrete structure such as office buildings. In particular, when the mold is removed after the curing and hardening of concrete, no protrusion is formed in the portion corresponding to the injection port of the mold so as to improve the workability of placing.

[0002]

2. Description of the Related Art Conventionally, in this type of concrete pouring apparatus, for example, when a side wall is constructed between pre-cast concrete columns, a plurality of injection ports are provided in a wall construction formwork framed between the columns. Open, and a discharge pipe is detachably inserted from the outside of the mold into each of these inlets and arranged,
The discharge port faces the inside of the mold.

[0003] A pumping pipe to which fresh concrete is pumped from a concrete supply source such as a concrete pump car is connected to the pumping port of each discharge pipe, and the fresh concrete is pumped and filled into the formwork through this pumping pipe. By doing so, concrete is placed.

Further, on the discharge port side of such a discharge pipe,
A shutter is provided so as to close the injection port of the formwork, and this shutter shuts off the fresh concrete from the pressure-feeding pipe after placing the concrete, and the fresh concrete in the formwork flows out from the injection port to the outside. To prevent it.

[0005]

However, in the concrete placing device having the above-described conventional structure, when the mold is removed after the concrete is cured and solidified, the cylindrical projections corresponding to the thickness of the mold form In order to impair the appearance of the structure, the work of removing and removing them is formed on the surface of the structure of the injection port traces, and such protrusions are formed according to the number of injection ports of the formwork. However, there is a problem that it takes a lot of time and effort and is very troublesome.

[0006]

An object of the present invention is to prevent the formation of useless protrusions on the surface of the structure during the removal of the formwork after the curing and hardening of the concrete, and to improve the workability of placing. To provide a concrete placing device.

[0007]

In order to solve the above-mentioned problems, the present invention provides a concrete filling means at an injection opening opened in a mold, and the concrete filling means supplies concrete into the mold. In a concrete pouring device which pumps and fills fresh concrete that is pumped from a source, the concrete filling means is such that the discharge port faces the injection port of the mold in a protruding state from the outside to the inside and the pumping port has the above-mentioned structure. It is equipped with a detachably attached discharge pipe to which a pressure pipe for feeding fresh concrete from a concrete supply source is connected, and this discharge pipe is a straight pipe which is used as a discharge port with one end opening facing the inside of the mold. And a branch pipe branched from the middle of this straight pipe through a communication port to form a bifurcated pipe, and the pressure feed pipe can be connected to the opening end portion which is the pressure feed port of the branch pipe. At the same time, a blocking piece that is slidable in a watertight manner toward the discharge port is provided on the opening side of the other end of the straight tube, and the pushing mechanism is removed from the outside of the straight tube to the blocking piece. A discharge pipe facing the inside of the mold after the concrete is poured into the mold while the blocking piece is slid to the open position of the communication port when the concrete is pumped by this pushing mechanism. It is configured such that it can be stopped by sliding it to the blocking end position of the projecting end face of the discharge port and the communication hole.

Further, according to the present invention, an elbow pipe is fitted and connected to a discharge port of a discharge pipe facing the inside of the mold, and an opening end serving as a discharge port of the elbow pipe is arranged upward and the mold is provided. When removing the frame after the curing and hardening of concrete, the discharge pipe can be removed from the outside while leaving the elbow pipe.

Further, the present invention is characterized in that the elbow pipe is fitted and connected to the discharge port of the discharge pipe through a connecting pipe.

Further, according to the present invention, the tip of the discharge piece of the blocking piece slidable in the straight tube of the discharge pipe is formed of an elastic body, and at least one protrusion is formed on the outer peripheral surface of the elastic body. The ridge is provided along the circumferential direction, and the ridge can be slidably contacted with the inner peripheral surface of the straight pipe of the discharge pipe.

Further, according to the present invention, a pressure contact plate is fastened to the end face of the elastic body on the discharge port side, and the outer peripheral surface of the elastic body can be bulged outward in the radial direction by the pressure contact plate. It is a feature.

[0012]

That is, according to the present invention, by adopting the above-mentioned structure, the discharge pipe, which is the concrete filling means, has a straight pipe as the discharge port with one end opening facing the inside of the mold, and the straight pipe. It is formed in a bifurcated tubular shape with a branch pipe branched from the way through the communication port, and at the opening end that is the pressure feed port of this branch pipe, it becomes possible to connect the pressure feed pipe,
A blocking piece that is watertightly slidable in a press-fitted state toward the discharge port is provided on the other end opening side in the straight tube, and the pushing mechanism can be detached from the outside of the straight tube to the blocking piece. With this pushing mechanism, the breaking piece can be slid to the open position of the communication port when concrete is being pumped so that it can be stopped. Is discharged from the mold into the mold, and the fresh concrete can be pumped and filled into the mold smoothly.

The shut-off piece is slid to the projecting end face of the discharge port of the discharge pipe and the closed shut-off position of the communication hole facing the inside of the mold by the pushing mechanism after the concrete is poured into the mold and stopped. In order to make it possible, keep the tip blocking surface of the blocking piece inside the injection hole of the mold during concrete curing, and when the mold is removed after the concrete is hardened by concrete curing, the trace of the injection hole of the mold Are formed as dents on the surface of the structure, which prevents the formation of protrusions as in the past, and the work of embedding the dents formed on the surface of the structure of the injection mark of such a mold is Since the work can be performed more easily than the work of removing the protrusions, the processing work after the placing can be performed easily.

Further, an elbow pipe is fitted and connected to a discharge port of the discharge pipe facing the inside of the mold, and an opening end serving as a discharge port of the elbow pipe is arranged to face upward. Since the discharge pipe can be removed from the outside of the form while leaving the elbow pipe when removing after the concrete is cured and hardened, the fresh concrete is discharged in a blow-up state from the discharge port of the elbow pipe during concrete pumping. , Even when the fresh concrete is filled up to the position above the discharge pipe, the discharge pressure does not directly act on the inner wall of the form, which prevents the form from being destroyed during concrete pumping as before. Smooth filling of fresh concrete into the formwork is possible.

Furthermore, since the elbow pipe is connected to the discharge port of the discharge pipe through the connection pipe, the length of the connection pipe is adjusted so that the center of the opening end of the elbow pipe in the frame. Positioning adjustment to parts can be performed easily.

Further, the tip of the discharge piece of the blocking piece slidable in the straight pipe of the discharge pipe is formed of an elastic body, and at least one ridge is formed on the outer peripheral surface of the elastic body. Since it is provided along the circumferential direction and this ridge can be slidably contacted with the inner peripheral surface of the straight pipe of the discharge pipe, the sealability can be improved and smooth filling of fresh concrete into the form can be performed by pressure. Can be done.

Moreover, since the pressure contact plate is fastened to the end face of the elastic body on the discharge port side, and the outer peripheral surface of the elastic body can be bulged outward in the radial direction by this pressure contact plate, Even if the outer peripheral surface wears due to frequent use, the elastic body swells by tightening the pressure contact plate, so that the sliding contact state with the inner peripheral surface of the straight tube can be reliably maintained, which prevents the deterioration of sealing performance. In addition, the elastic body can be used for a long period of time.

[0018]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIGS. 1 to 5 show a first embodiment of a concrete placing apparatus according to the present invention, which is shown in FIG. In the figure, 1 is a construction mold, 2 is an injection port opened in the mold 1, and 10 is a discharge pipe as a concrete filling means attached to the injection port 2 of the mold 1.

The discharge pipe 10 is formed into a bifurcated pipe by a straight pipe 11 and a branch pipe 13 branched from the middle of the straight pipe 11 through a communication port 12.
Is detachably attached and fixed to the outer wall surface 1a corresponding to the injection port 2 of the mold 1 through a support plate 14 provided on the outer periphery of the one end opening 11a side by a bolt or the like (not shown). There is.

Further, one end opening 11a of the straight tube 11 is provided.
Is the discharge port 10a of the discharge pipe 10 which is inserted into the injection port 2 of the mold 1 and faces the inside thereof in a protruding state, while the open end 13a of the branch pipe 13 is a concrete pump not shown. A pressure-feeding pipe 3 to which fresh concrete PC is pressure-fed from a concrete supply source such as a car is a pressure-feeding port 10b of the discharge pipe 10 connected via a connection fitting 4.

Then, as shown in FIG. 2, on the other end opening 11b side in the straight tube 11 forming the discharge tube 10, as shown in FIG.
The shutoff piece 15 is inserted so as to be slidable in a watertight manner toward the discharge port 10a side, and the discharge port side tip portion 15a of the shutoff piece 15 is formed by a columnar elastic body 16 such as rubber. In addition, the outer peripheral surface 16a of the elastic body 16 is
At least one (two in the illustrated embodiment) ridge portion 1
7 and 17 are integrally provided along the circumferential direction, and these ridges 17 and 17 can be slidably contacted to the inner peripheral surface of the straight tube 11 in a pressed state.

Further, reference numeral 18 in the drawing denotes a pressure contact plate which is fastened to the end face 16b of the elastic body 16 on the discharge port side with a tightening bolt 19, and the pressure contact plate 18 is made by the tightening force of the tightening bolt 19 to make the elastic body. The outer peripheral surface of 16 can be bulged toward the outer radial direction.

Reference numeral 20 in the drawing denotes a pushing mechanism for the blocking piece 15. The pushing mechanism 20 is provided with the discharge pipe 10.
A connecting member 21 formed of a cylindrical coupling fitted to the outer periphery of the other end opening 11b of the straight tube 11 and detachably fixed via the connecting fitting 5, and a central axis in the connecting member 21. A pushing member 22 made of a spiral rod, which is inserted along with and has a front end portion 22a abutting against the rear end surface 15b of the blocking piece 15 in an abutting state.
And a holding member 23 formed of a female screw ring for holding the pushing member 22 in a screwed state, and a handle 24 detachably provided at a rear end portion 22b of the pushing member 22 held by the holding member 23. Has been done.

That is, in the pushing mechanism 20 described above, the straight pipe 11 of the discharge pipe 10 is, as shown in FIG. 1, caused by the tip 22a of the pushing member 22 which is rotationally moved by the rotating operation of the handle 24 during concrete pumping.
The blocking piece 15 placed in the initial standby position A in FIG.
As shown in FIG.
The sliding member 22 can be stopped by sliding to the open position B. At this time, the moving distance of the pushing member 22 is set by the moving distance of the spiral rod (for example, 5 mm / 1 rotation) depending on the rotation speed of the handle 24. It is supposed to be done.

Then, in this state, the ready-mixed concrete PC is passed through the pressure feed pipe 3 from the concrete supply source such as the concrete pump car connected to the opening end portion 13a of the branch pipe 13 serving as the discharge port 10a of the discharge pipe 10. The mold 1 is pressure-fed into and filled from the discharge port 10a of the discharge pipe 10.

In this way, when the concrete placing by the pressure-filling of the fresh concrete PC into the mold 1 is completed, as shown in FIG. 4, the handle 24 of the pushing mechanism 20 is rotated to push the concrete again. The member 22 is rotated, and the blocking piece 15 is slid to the closing blocking position C of the projecting end face of the discharge port 10a of the discharge pipe 10 facing the inside of the mold 1 and stopped, and simultaneously with the discharge port 10a, The communication hole 12 between the straight pipe 11 and the branch pipe 13 forming the discharge pipe 10 is blocked and closed, and in this state, curing and solidification of concrete is performed.

At this time, when the blocking piece 15 slides to the closed blocking position C, the fresh concrete PC remaining in the discharge port 10a side of the discharge pipe 10 is pushed into the mold 1 and remains. The pushing action of the ready-mixed concrete PC fills the voids formed between the upper surface of the ready-mixed concrete PC filled in the formwork 1 and the upper formwork surface, thus enabling the complete filling of the ready-mixed concrete PC.

After such concrete curing and hardening, as shown in FIG.
As shown in FIG.
From the mold 1 to remove the discharge pipe 10,
And in this case the construct 100
The surface of the mold has a recess 101 as an injection mark of the mold 1.
The pit 101 is formed, but the recess 101 is configured to be embedded with mortar or the like.

In the figure, 31 and 32 are the discharge pipes 10.
Which is provided by being screwed onto the outer peripheral surface of the straight tube 11 forming the
The second fixing bolt makes it possible to fix the blocking piece 15 stopped at the open position B of the communication port 12 shown in FIG. 2 with the first fixing bolt 31, while the second fixing bolt is used. The discharge port 1 of the discharge pipe 10 shown in FIG.
The blocking piece 15 stopped at the closed blocking position C on the protruding end face of 0a can be fixed, and the pushing mechanism 20 can be removed at these stopped positions.

By making the pushing mechanism 20 detachable in this manner, the use of the individual pushing mechanism 20 for the discharge pipe 10 attached to each of the injection ports 2 of the mold 1 is eliminated, and one pushing mechanism is provided. Formwork 20 at 20 other places
The blocking piece 15 of the discharge pipe 10 attached to the injection port 2 can be operated.

6 to 8 show a second embodiment according to the present invention. As shown in FIG. 6, an elbow pipe 40 is fitted to a discharge port 10a of the discharge pipe 10 facing the inside of the mold 1. The elbow pipe 40 can be detached from the outside of the mold 1 by the bolt 33 and the nut 34 by connecting the
The opening end 41 serving as the discharge port is located at the center of the mold 1 and is arranged upward.

That is, in the elbow pipe 40, by arranging the opening end 41 of the elbow pipe upward, the concrete concrete PC is discharged in a blow-up state at the time of pumping concrete, whereby, as shown in FIG. Even when the fresh concrete PC is filled up to the position above the discharge pipe, the discharge pressure P is dispersed upward so as to prevent the discharge pressure P from being directly applied to the inner wall surface 1b of the mold 1. As shown, the elbow pipe 40 is left in the structure 100 as it is after the curing and solidification of the concrete.

FIG. 9 shows a third embodiment according to the present invention,
The elbow pipe 40 in the second embodiment described above is replaced by the discharge pipe 10.
When connecting to the discharge port 10a of the discharge pipe 10 of the above, the connection pipe 50 is used, and the discharge port 10 of the discharge pipe 10 is connected through this connection pipe 50.
The elbow pipe 40 by fitting and connecting to a.
The opening end 41 is positioned and adjusted at the center of the mold 1.

In the above embodiment, the discharge pipe 10
As the pushing mechanism 20 for sliding the shutoff piece 15 in the inside,
Although the spiral rod rotated and moved by the rotating operation of the handle 24 is used as the pushing member 22, a driving device such as a hydraulic cylinder or an air cylinder can be used, and its selection is arbitrary.

[0035]

As is apparent from the above description, according to the present invention, a discharge pipe, which is a concrete filling means, has a straight pipe whose one end opening faces the inside of the mold to form a discharge port, and a straight pipe of this straight pipe. It is formed in a bifurcated tubular shape with a branch pipe branched from the middle through a communication port, and the pressure feed pipe can be connected to the opening end portion which is the pressure feed port of this branch pipe, and the other end opening in the straight pipe On the side of the section, there is provided a shut-off piece body which is slidable in a watertight manner toward the discharge port in a press-fitted state, and the push-in mechanism is detachably provided on the shut-off piece body from the outside of the straight pipe. Since the blocking piece can be stopped by sliding it to the open position of the communication port when concrete is being pumped, fresh concrete at the time of concrete pumping is discharged from the discharge port into the formwork through the branch pipe of the discharge pipe. Can and formwork The pumping and filling of fresh concrete to can be smoothly performed.

After the concrete is poured into the mold, the shut-off piece is slid to a shut-off position where the discharge end of the discharge pipe of the discharge pipe facing the inside of the form and the communication hole are blocked by a pushing mechanism. Since it is possible, the tip blocking surface of the blocking piece remains inside the mold injection port during concrete curing, and when the mold is removed after concrete curing, the injection mark on the mold is removed. Are formed on the surface of the structure as depressions, which can prevent the formation of protrusions as in the past, and the embedding treatment of the depression formed on the surface of the construction of the injection mark of such a formwork. Since the work can be performed more easily than the work of removing the protrusion, the processing work after the placing can be performed easily.

Further, in claim 2, the elbow pipe is fitted and connected to the discharge port of the discharge pipe facing the mold, and the opening end serving as the discharge port of the elbow pipe is arranged upward. In addition, since the discharge pipe can be removed from the outside of the mold leaving the elbow pipe when removing the mold after curing and hardening the concrete, the raw concrete is blown up from the discharge port of the elbow pipe during concrete pumping. Even if the concrete is discharged to the upper position of the discharge pipe, the discharge pressure does not directly act on the inner wall of the form,
It is possible to prevent the former form from being broken during the concrete concrete is being pressure-fed, and it is possible to smoothly perform the filling and filling of the concrete with fresh concrete.

Furthermore, in the present invention, since the elbow pipe is connected to the discharge port of the discharge pipe through the connection pipe, the opening end of the elbow pipe is adjusted by adjusting the length of the connection pipe. Positioning adjustment to the center of the mold can be easily performed.

Further, in the present invention, the tip of the discharge piece of the blocking piece slidable in the straight tube of the discharge pipe is formed of an elastic body, and at least one protrusion is formed on the outer peripheral surface of the elastic body. Since the ridges are provided along the circumferential direction, and the ridges can be slidably contacted with the inner peripheral surface of the straight pipe of the discharge pipe, the sealability can be improved and the protrusions can be kept in the mold. The fresh concrete can be more smoothly pumped and filled.

Further, in the present invention, the pressure contact plate is fastened to the end surface of the elastic body on the discharge port side, and the outer peripheral surface of the elastic body can be bulged outward in the radial direction by the pressure contact plate. , Even if the outer peripheral surface of the elastic body wears due to frequent use,
Since the elastic body can be expanded by tightening the pressure contact plate, it is possible to reliably maintain the slidable contact state with the inner peripheral surface of the straight tube, and thereby to prevent the deterioration of the sealability. Long-term use of the elastic body can be expected.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view of essential parts showing a first embodiment of a concrete pouring device according to the present invention.

FIG. 2 is an enlarged half sectional view of the blocking piece.

FIG. 3 is a schematic sectional view showing a sliding state of the blocking piece to the communication port opening position by the pushing mechanism.

FIG. 4 is a schematic cross-sectional view showing a sliding state of the blocking piece by the pushing mechanism to the discharge port closing blocking position.

FIG. 5 is an explanatory view showing a detached state of the formwork after the concrete pouring and curing is solidified.

FIG. 6 is a schematic cross-sectional view of a main part showing a second embodiment of the concrete pouring device according to the present invention.

FIG. 7 is a schematic sectional view showing a state in which fresh concrete is pumped and filled.

FIG. 8 is an explanatory diagram showing a state where the elbow pipe remains in the structure after concrete curing and hardening.

FIG. 9 is a schematic cross-sectional view of essential parts showing a third embodiment of the concrete pouring device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Formwork, 1a ... Outer wall surface, 1b ... Inner wall surface, 2 ... Injection port, 3 ... Pumping pipe, 4, 5 ... Connection metal fittings, 10 ... Concrete filling Means (discharging pipe), 10a ... Discharging port, 10b ... Pumping port, 11 ... Straight tube, 11a ... One end opening (discharging port), 11b ... Other end opening, 12. ..Communication port, 13 ... Branch pipe, 13a ... Open end (pressure feed port), 14 ... Support plate, 15 ... Block piece, 15a ... Discharge port side tip part, 15b ... rear end surface, 16 ... elastic body, 16a ... outer peripheral surface, 16b ... discharge port side end surface, 17, 17 ... ridge portion, 18 ... pressure contact plate, 19 ... Tightening bolt, 20 ... Pushing mechanism, 21 ... Connection member (coupling,) 22 ... Pushing member (spiral rod), 2 2a ... Bumping front end, 22b ... Rear end, 23 ... Support member (female screw ring), 24 ... Handle, 40 ... Elbow pipe, 41 ... Open end (Discharge port) ), 50 ... Connection pipe, A ... Initial standby position of the blocking piece, B ... Communication port opening position of the blocking piece, C ... Discharge port closing blocking position of the blocking piece, PC ... ..Green concrete

Claims (5)

[Claims] 1. A concrete pouring method in which a concrete filling means is provided at an injection opening opened in a mold, and the concrete filling means pumps and fills the concrete into the mold with a fresh concrete pressure-fed from a concrete supply source. In the apparatus, the concrete filling means has a discharge port that faces the injection port of the mold in a protruding state from the outside to the inside, and a pumping pipe for pumping fresh concrete from the concrete supply source is connected to the pumping port. The discharge pipe is movably attached. The discharge pipe includes a straight pipe that has one end opening facing the inside of the mold and serves as a discharge port, and a branch that is branched from the middle of the straight pipe through the communication port. It is formed into a bifurcated tube with a pipe, and the pressure feeding pipe can be connected to the opening end portion which is the pressure feeding port of the branch pipe, and the other end opening side in the straight pipe is directed toward the discharge port. A shutoff piece that is slidable in a watertight and press-fit state is provided, and a push-in mechanism is provided on this shutoff piece so that the push-in mechanism can be removed from the outside of the straight tube. Sometimes it is slid to the open position of the communication port, while it is slid to the projecting end face of the discharge port of the discharge pipe and the closing blocking position of the communication hole facing the inside of the mold after placing concrete in the mold. The concrete pouring device is characterized in that it can be stopped. 2. An elbow pipe is fitted and connected to a discharge port of a discharge pipe facing the inside of the mold, and an opening end serving as the discharge port of the elbow pipe is arranged upward, and the concrete of the mold is formed. 2. The concrete placing device according to claim 1, wherein the discharge pipe can be removed from the outside while leaving the elbow pipe at the time of removal after curing and solidification. 3. The concrete pouring device according to claim 1, wherein the elbow pipe is connected to the discharge port of the discharge pipe through a connecting pipe. 4. A discharge piece side tip of a shut-off piece which is slidable in a straight tube of the discharge tube is formed of an elastic body, and at least one ridge portion is formed around the outer peripheral surface of the elastic body. 4. The concrete placing device according to claim 1, wherein the projecting ridge portion is provided along the direction and is slidable on the inner peripheral surface of the straight pipe of the discharge pipe. 5. A pressure contact plate is fastened to the end face of the elastic body on the discharge port side,
The concrete pouring device according to claim 4, wherein the outer peripheral surface of the elastic body is allowed to bulge outward in a radial direction by the press contact plate.