JP2512372B2 - Inlet blocking device for concrete pressure feeding - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is to cure a concrete (including mortar in the present invention) through a pressure-feeding pipe in a concrete pump car or the like, and then to cure the concrete. The present invention relates to a concrete pressure feed inlet blocking device for preventing concrete from flowing out of the concrete inlet.

[0002]

2. Description of the Related Art A conventional concrete pressure-feeding cutoff device of this type is a retractable plate or a connecting pipe for connecting or disconnecting a concrete pressure-feeding pipe, which is capable of blocking or opening the concrete pressure-feeding passage. Some had multiple pins.

[0003]

However, in the above-described conventional concrete pressure-feeding shutoff device, a concrete pump is used to drive the concrete through the pressure-feeding pipe into the structure form, and then the concrete is pushed. Even if the plate or a plurality of pins of the pressure feeding shutoff device is advanced into the concrete pressure feeding path and the concrete pressure feeding path is blocked, the concrete is cured from the inner surface of the building mold by curing and solidifying the concrete. A cylindrical concrete protrusion corresponding to the length of the plate or the blocking portion of the pin is formed.

Therefore, the projecting columnar concrete projections must be cut or scraped from the surface of the concrete structure, not only damaging the surrounding concrete structure but also the projecting columnar structure. The work of removing concrete protrusions occurred at each injection site of concrete, and the removal work was difficult. The present invention has been made in view of the above points, and the purpose thereof is that after pouring concrete, the concrete injection port does not project in a columnar shape from the inner surface of the structure for the structure, and the inner surface of the structure for the structure. In a connection pipe that is finished in a state that is almost the same as or recessed from that, and that the concrete and the barrier are easily peeled off, and after the concrete is poured into the formwork, it is connected to the injection pipe attached to the construction formwork. The inside of the connecting pipe can be cleaned in the process of the extruded body moving inside the connecting pipe and closing the concrete inlet without washing the concrete residue of the above with water, and only one detachable pushing mechanism is attached to each connecting pipe and removed. The concrete inlet can be shut off at any time, which is extremely economical, and the elastic member that slides on the inner wall of the pipe can be adjusted to bulge in the radial direction for long-term use. And to provide a concrete pumping for inlet shutoff apparatus.

[0005]

SUMMARY OF THE INVENTION An injection port blocking device for concrete pumping according to the present invention connects one end side of a connecting pipe to an injection pipe attached to a construction formwork, and concrete pumping is performed in the middle of the connecting pipe. Providing a retractable plate or a plurality of pins for blocking or opening the passage, the other end side of the connecting pipe is detachably connected to either the concrete pumping pipe or the tubular body having the same diameter as the connecting pipe, Also, the push-out mechanism including the tubular body, a nut portion provided at the end side axial center portion of the tubular body, and a long screw rod that is screwed into the nut portion and enters and retracts in the connection pipe is provided, and the connection is performed. At the time of connecting the pipe and the tubular body, a rubber is provided between the front end face of the metal tubular body whose both ends are slightly smaller than the inner diameter of the connecting pipe and the circular metal plate whose diameter is slightly smaller than the inner diameter of the connecting pipe. , Sandwich the elastic member such as synthetic resin, and put it in the center of the circular metal plate. An extrusion body is provided which bulges the elastic material in the radial direction by elastic adjustment of the tightening of the countersunk screw that is threadedly attached to the front end surface of the metal tubular body through the circular elastic material to elastically press the inner wall surface of the connecting pipe. The extruded body is separated and brought into contact with the extruding mechanism.

[0006]

Operation: One end of the connecting pipe is connected to the injection pipe attached to the construction mold, and the other end of the connecting pipe is connected to the pressure feeding pipe.
Concrete is pumped by a concrete pump car or the like so as to pass through each of the pumping pipe, the connecting pipe and the injection pipe. After placing concrete on the formwork for construction in this way,
The concrete pressure feeding path is cut off by advancing a retractable plate or a plurality of pins for blocking or opening the concrete pressure feeding path into the connecting pipe. Next, the pressure feed pipe connected to the other end of the connecting pipe is removed, and the pushing mechanism according to the present invention is attached to the other end of the connecting pipe, and an elastic member that separates and abuts on the pushing mechanism and slides on the inner wall of the connecting pipe. The extruded body equipped with is attached.

The pushing mechanism slides the pushing body in the connecting pipe and the filling pipe, and the pushing body is located at the inner surface of the mold in the filling pipe attached to the mold or at a position projecting from the inner surface of the mold to the concrete casting side. Extrude until. At this time, since the elastic member of the extruded body slides while elastically contacting the inner wall of the pipe, the intrusion of concrete from the front end surface of the extruded body into the rear pipe is eliminated. Further, when the push-out mechanism is operated to advance the push-out body into the pipe, the plate or the plurality of pins are naturally moved outside the pipe so as not to interfere with the advance of the push-out body. After curing and curing the concrete, the mold may be removed and the extruded body may be removed from the concrete.

[0008]

An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a concrete pressure feed injection port blocking device according to an embodiment of the present invention, in which a connecting pipe 3 connected to a concrete pressure feed pipe 2 is provided with a retractable plate 4 for blocking or opening a pipeline. (In this example, the case of the plate 4 is shown, but a plurality of pins (not shown) may be arranged in a row at a predetermined interval.), And the end side of the connection pipe 3 is provided. The push-out mechanism 5 is detachably attached to the push-out mechanism 5, and the push-out body 6 is provided with an elastic member 7 which is in separate contact with the push-out mechanism 5 or is in contact with the push-out mechanism 5 and slidably contacts the inner wall of the connecting pipe 3.

The plate 4 advances into the pipe from the outside through a hole formed in the connecting pipe 3 to block the inflow of concrete,
Alternatively, the rack 7 and the pinion 8 can be retracted and retracted in order to secure a passage for the inflow of concrete outside the pipe. The means for moving the plate 4 and the pins into and out of the connecting pipe 3 is not limited to the above means, and may be manual or automatic. The push-out mechanism 5 includes a flange 3a on the end portion side of the connecting pipe 3 and a flange 9a formed on a tubular body 9 having the same diameter as the connecting pipe 3 from the outside to fix the metal fitting
Securely attach and detach with. A nut portion 12 into which the long screw rod 11 is screwed and inserted is provided at an axial center portion of the tubular body 9, and a rotation handle 13 is provided at an end portion of the long screw rod 11 screwed into the nut portion 12. A circular push plate 14 is attached to the tip of the long screw rod 11.

Further, the extrusion mechanism 5 can extrude an extruded body 6 which will be described later to a position on the inner surface of the mold inside the injection pipe 16 attached to the construction mold 15 or to a position projecting from the inner surface of the mold to the concrete casting side. Long screw rod with a stroke length like this
1 is formed. The extruded body 6 including the elastic member 17 is axially clamped so that a circular elastic material such as rubber and synthetic resin having oil resistance, water resistance, chemical resistance, etc. can be bulged in the radial direction. Has been done. That is, the rubber which is the elastic member 17 is provided between the front end face of the metal tubular body 18 with both ends having a diameter slightly smaller than the inner diameter of the connecting pipe 3 and the circular metal plate 19 having a diameter slightly smaller than the inner diameter of the connecting pipe 3. , A circular plate-shaped elastic member 17a such as a synthetic resin is sandwiched, a circular plate-shaped metal plate 19 is penetrated through the circular elastic member 17a, and a plate screw 20 screwed to the front end surface of the metal cylinder 18 is provided. The circular elastic material 17a swells in the radial direction due to the degree of tightening, and slides while elastically pressing the inner wall surface of the connecting pipe 3.

The elastic member 17 is not necessarily circular as in this example, and may be ring-shaped as long as it can swell in the radial direction by tightening.
The pushing mechanism 5 and the pushing body 6 including the elastic member 17 are separated from each other, and the connecting pipe 3
Either the structure may be such that they abut each other, or they may be connected to each other. When the pushing mechanism 5 and the pushing body 6 provided with the elastic member 17 are separated, only the pushing body 6 is concreted.
The extrusion mechanism 5 is detached from the connecting pipe 3 and is attached to the connecting pipe on the next concrete inlet side, and another extruding body is used, so that each concrete unit can be installed in one device. -The inlet can be shut off at any time,
It is extremely economical.

Next, a method of using this device will be described. Injection pipe 1 in which one end side of the connection pipe 3 is attached to the construction mold 15
6, and the other end of the connecting pipe 3 is connected to the concrete pressure feeding pipe 2. The pressure feeding pipe 2, the connecting pipe 3 and the injection pipe 16
Concrete so that concrete passes through each of
Forced pumping with a pump car. In this way, after the concrete is cast on the building form frame 15, the pinion 8 meshed with the rack 7 is rotated to move the retractable plate 4 or a plurality of pins for blocking the concrete pressure feeding path into the pipe. Then, the plate 4 or a plurality of pins are advanced into the connecting pipe 3 to shut off the concrete pressure feeding path. Next, the pressure feeding pipe 2 connected to the other end of the connecting pipe 3 is removed, and the pushing mechanism 5 according to the present invention is attached to the other end of the connecting pipe 3 so as to be in separate contact with or connected to the pushing mechanism 5. Then, the push-out body 6 provided with the elastic member 17 that slidably contacts the inner wall of the connecting pipe 3 is mounted.

That is, when the extruded body 6 is formed in a separated state from the extruding mechanism 5, the extruded body 6 is loaded in the connecting pipe 3 in advance. When the extruded body 6 is formed in a state of being connected to the extruding mechanism 5, the extruded body 6 is first loaded into the connecting pipe 3. Then, after the extruded body 6 is loaded, the flange 3a on the end side of the connecting pipe 3 and the connecting pipe 3
The flanges 9a formed on the cylindrical body 9 having the same diameter as that of the push-out mechanism 5 are detachably fixed from the outside by the fixing metal fittings 10.
Is attached to the end of the connecting pipe 3. After the push-out mechanism 5 is mounted, when the push-out mechanism 5 is operated to advance the push-out body 6 into the pipe, the plate 4 or the plurality of pins are naturally moved outside the pipe to prevent the push-out body 6 from moving forward. Try not to be. When the rotating handle 13 is turned, the long screw rod 1
1 is rotated and is guided by a nut portion 12 that is screwed into the connecting pipe 3
Circular push plate 1 at the tip of the long screw rod 11
4 pushes the rear end surface of the metal tubular body 18 constituting the extruded body 6, and advances the extruded body 6 in the connecting pipe 3. At this time, since the elastic member 17 slides while elastically contacting the inner wall of the connecting pipe 3, the intrusion of concrete from the front end surface of the extruded body 6 into the rear pipe is eliminated.

The rotating handle 13 is further rotated to move the long screw rod 11 forward so that the tip of the extruded body 6 is filled with the injection pipe 16.
Position of the inner surface of the construction mold 15 to which is attached or the mold 15
Extrude from the inner surface to the position where it projects toward the concrete casting side. After curing and solidifying the concrete, the construction mold 15 may be removed and the extruded body 6 may be removed from the concrete.
Therefore, the cured and solidified concrete inlet is formed to be the same as or recessed from the surface of the concrete construct. The inlet of the recessed portion may be filled with concrete later.

When the push-out mechanism 5 and the push-out body 6 having the elastic member 17 are separated, only the push-out body 6 is loaded into the concrete inlet, and the push-out mechanism 5 is connected to the connecting pipe 3 It is possible to shut off each concrete injection port with one device at any time by attaching it to the connecting pipe on the side of the next concrete injection port and using another extrusion body, which is extremely economical. is there. When the elastic member 17 is worn due to use, the plate screw 20 is tightened so that the elastic member 17 is attached to the metal cylindrical body 1 by the circular metal plate 19.
As a result of being strongly pressed to the front end face side of 8, the elastic member 1
7 will swell in the radial direction and will be elastically pressed against the inner wall surface again, and adjustment of tightening will enable long-term use.

[0016]

As can be seen from the above description, the present invention has the following unique effects. A concrete pumping inlet blocking device according to the present invention connects one end side of a connecting pipe to a filling pipe attached to a building formwork, and cuts off or opens the concrete feeding route in the middle of the connecting pipe. A plate or a plurality of pins that can be retracted and provided is provided, and the other end of the connecting pipe is detachably connected to either the concrete pumping pipe or a tubular body having the same diameter as the connecting pipe, and the tubular body and the tubular body are connected. An extruding mechanism including a nut portion provided at the end side axial center portion and a long screw rod that is screwed into the nut portion to enter and retract in the connecting pipe is provided, and at the time of connecting the connecting pipe and the tubular body. , An elastic member such as rubber or synthetic resin is sandwiched between a front end face of a metal cylinder body whose both ends are slightly smaller than the inner diameter of the connecting pipe and a circular metal plate having a diameter slightly smaller than the inner diameter of the connecting pipe. , Made of metal penetrating the circular elastic material from the center of the circular metal plate An extruding body is provided by elastically bulging the elastic material in the radial direction to elastically press the inner wall surface of the connecting pipe by adjusting the tightening of a countersunk screw that is screwed to the front end surface of the body, and the extruding body is separated to the extruding mechanism. Since they are in contact with each other, after pouring concrete, the concrete injection port does not project in a cylindrical shape from the inner surface of the building formwork, and it is finished in a state that is approximately the same as or recessed from the inner surface of the building formwork. In addition, the concrete can be easily separated from the barrier, and after the concrete is poured into the formwork, the concrete residue in the connecting pipe that is connected to the injection pipe attached to the building formwork is washed with water each time. The troublesome work of cleaning is eliminated, and the present invention has an excellent effect that the inside of the connecting pipe can be cleaned during the process in which the extruded body moves inside the connecting pipe to close the concrete injection port. In addition, one detachable push-out mechanism can be attached to each connection pipe and each concrete injection port can be shut off at any time simply by removing it, which is extremely economical. Moreover, since the elastic member that is in sliding contact with the inner wall of the connecting pipe can be adjusted to bulge in the radial direction, even if the elastic member is worn by use, it can be repeatedly used by bulging the elastic member in the radial direction, and long-term use is possible ..

Further, in the concrete-pressure-feeding inlet blocking device according to the present invention, a connecting pipe connected to the concrete pressure-feeding pipe is provided with a retractable plate or a plurality of pins for blocking or opening the concrete pressure-feeding passage, Since an extruding mechanism provided with an extruding mechanism detachably attached to the end portion side of the connecting pipe and an elastic member that separates and abuts on the extruding mechanism and slides in contact with the inner wall of the connecting pipe, concrete is put after the concrete is poured. The workability is very good, because the pressurization path can be shut off immediately and the concrete inlet without projection can be shut off quickly. Further, the extruded body provided with the elastic member has a good peeling property from concrete, and the removing work is easy.
Furthermore, since the extrusion mechanism and the extrusion body provided with the elastic member are separated, only the extrusion body is loaded in the concrete inlet, the extrusion mechanism is removed from the connection pipe, and the next concrete inlet side connection is made. By mounting on a pipe and using a separate extrusion, one concrete device can shut off each concrete inlet at any time, which is extremely economical.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view of a concrete pressure-feeding inlet blocking device showing an embodiment of the present invention.

FIG. 2 is a partial cross-sectional side view showing a mounted state of a concrete pressure-feeding inlet blocking device.

FIG. 3 is a plan view of FIG. 2;

4 (a) and 4 (b) are schematic cross-sectional views showing traces of blocking the concrete injection port after concrete casting.

[Explanation of symbols]

1 Concrete pressure feed injection port blocking device 2 Concrete pressure feed pipe 3 Connection pipe 4 Plate 5 Extrusion mechanism 6 Extrusion body 11 Long screw rod 15 Construction formwork 16 Injection pipe 17 Elastic member

Claims (1)

(57) [Claims] 1. A connecting pipe to an injection pipe attached to a construction formwork.
Connect one end side of the
A plate or compound that can be retracted freely to block or open the feeding path
Number of pins, and connect the other end of the connecting pipe with concrete pressure.
Removably connect with either a pipe or a cylinder with the same diameter as the connecting pipe.
And a cylinder provided at the end of the cylinder and the axial center of the cylinder.
It is screwed into the nut part and the nut part to enter and retract inside the connecting pipe.
A push-out mechanism consisting of a long screw rod
When connecting the connection pipe and the cylinder, make sure that the inside diameter of the connection pipe
The front end face of a metal cylinder with both ends of a slightly smaller diameter sealed
And a circular metal plate with a diameter slightly smaller than the inner diameter of the connecting pipe.
Place an elastic member such as rubber or synthetic resin between the
From the center, pierce the circular elastic material and screw it onto the front end face of the metal cylinder.
Adjust the tightening of the countersunk screw that is worn to the radial direction of the elastic material.
Extrusion that bulges in the opposite direction and represses the inner wall surface of the connecting pipe
Body is provided, and the extruded body is separated and brought into contact with the extruding mechanism.
Concrete pumping for inlet shutoff and wherein the meta.