JPS6338933Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fiber conveying device that continuously conveys fiber pieces from a distance to be sprayed together with a wet mixture such as concrete or mortar.

The inventor of this invention had previously filed Utility Application No. 113324 (July 28, 1987), but this "wet spraying device" mainly involves the nozzle man directly stopping the device at hand.
It was a wet-type spraying device that pumped the spraying material directly to the nozzle for starting operation, giving the nozzle the amount of air necessary for spraying, and the fiber sprayer was still installed above the spray gun. (Figure 1). Therefore, in this conventional product, since the nozzle man has a spray gun equipped with a cutting device such as a fiber nozzle, an air motor, and a roving cutter, it is heavy and inconvenient to handle.

○ It is necessary to transport the fiber roving wrapped with fiber yarn to the spraying work area.
Not only is it troublesome, but it also gets in the way of work, as it hangs on your feet.

○C Especially when handled in a humid place such as inside a tunnel, the fiber threads tend to break easily, the roving cutter becomes clogged, and stone powder adheres to the fiber threads, damaging the fiber cutter.

The present invention was researched and improved in order to eliminate the above-mentioned drawbacks, and is a fiber transport system in which only a fiber nozzle is installed near the spray gun, and a cutting device such as an air motor and a roving cutter is placed far back. A first secondary air conduit is provided so that a part of the primary air from the compressor is ejected from the nozzle of the spray gun, and a rapid setting agent and a main agent are supplied to the spray gun installed at a distance. , a second secondary air conduit for blowing out fiber pieces from a fiber nozzle installed near the spray gun and spraying the fiber pieces together with the quick-setting agent and the main agent onto the spraying surface; A third secondary air conduit is provided to cut the fiber yarn into fiber pieces by rotating a motor, and the rapid setting agent and the main agent are injected from the nozzle of the spray gun by opening a valve in the spray gun. As a result, when the pressure inside the first secondary air conduit decreases, the third secondary air conduit is opened and the fiber piece is formed in the third secondary air conduit. When the pressure inside the first secondary air line increases due to the blowing from the fiber nozzle and the closing of the valve in the spray gun, the third secondary air line is closed to stop the rotation of the fiber cutter. Accordingly, it is an object of the present invention to provide a fiber conveying device comprising an electric control section for controlling the blowing out of fiber pieces from a fiber nozzle.

A preferred embodiment of the present invention will be explained based on the accompanying drawings. Fig. 2 is a plan view of the carrier box of the present invention with the lid removed, Fig. 3 is a left side view of Fig. 2, and Fig. 4 is a view of the transport machine box of the present invention with the lid removed. 5 is a system diagram of the conveying device of the present invention, and FIG. 6 is a vertical sectional view of a spray gun and a fiber nozzle installed above it.

In FIGS. 2 to 6, reference numeral 11 denotes a compressor which is an air pressure source, and the primary air pumped through a hose 30 is passed through an air inlet 33 to the box body 13 by a manual valve 12 that controls air opening/closing and pressure adjustment. The liquid is then dried and filtered through a filter 14 with an automatic discharger. The filtered pressurized air is
A first secondary air pipe is provided so that the rapid setting agent and the main agent, which are branched at the tee 15 and a part of which is supplied via a hose 31 to a spray gun 100 installed at a distance, are ejected from a nozzle 101 of the spray gun. Road 102
Then, the fiber piece is branched from the first secondary air pipe line 102 by the second tee 29, passes through an ejector, and blows out the fiber piece from a fiber nozzle 105 connected and installed near the spray gun with a hose 32. The air is configured to be sent to a second secondary air conduit 103. Further, the remainder of the compressed air branched at the first tee 15 is used as the second secondary air, which rotates the air motor 17 and the fiber cutter 19 interlocked with the air motor 17 to cut the fiber thread 21 into fiber pieces. It is configured to be connected to the pipe line 103 and sent to a third secondary air pipe line 104 having an ejector 22 at its tip.

The quick setting agent and main agent supplied from the first tee 15 to the spray gun 100 are transferred to the nozzle 1 of the spray gun.
1st secondary air pipe line 10 for blowing out from 01
2 includes a pressure reducing valve 24 for keeping the pressurized air constant.
Pressure gauge 2 with contacts that measures air pressure
an electric control unit that detects the pressure with a pressure detector such as No. 5 and converts it into an electric signal, and controls the opening and closing of the solenoid valve 26 in the third secondary air pipe 104 with this signal;
That is, by opening the valve 107 in the spray gun 100, the quick-setting agent and the main agent supplied by the pump to the spray gun 100 are ejected from the nozzle 101 of the spray gun, thereby causing a drop in the pressure inside the first secondary air pipe 102. At this time, the solenoid valve 26 is opened to rotate the air motor 17 and the fiber cutter 19 to cut the fiber thread 21 and blow out the fiber pieces from the fiber nozzle 105. When the pressure inside the first secondary air line 102 rises rapidly due to the closure, the solenoid valve 26 is closed to close the third secondary air line 104 and disconnect the air motor 17 and fiber cutter 19. By stopping the rotation, blowing out the fiber pieces from the fiber nozzle 105 is stopped. The second secondary air line 103 is connected to the first air line by the second tee 29.
It further branches from the secondary air pipe of filter 1.
The compressed air filtered in step 4 is sent to the ejector 22 and cut by the fiber cutter 19 in the third secondary air pipe 104, and the fiber pieces blown to the ejector 22 by centrifugal force are passed through the hose 32 to the fiber nozzle 105. I try to make it come out. The third secondary air pipe transfers the remainder of the air filtered by the filter 14, which is sent to the first and second secondary air pipes, to an oiler 16, adds oil thereto, and then removes the oil. The air motor 17 is rotated by air without burning. In this way, the air motor 17 rotates the fiber cutter 19 by the motor shaft, cuts the fiber yarn 21 supplied from the separately prepared fiber roving 20 into fiber pieces,
At the same time, centrifugal force forces the fiber pieces into the ejector 22.
The fiber pieces are blown out from the fiber nozzle 101 by the ejector 22 using the air pressure from the second secondary air line 103, and the quick setting agent and the main agent are blown out from the fiber nozzle 105 using the air pressure from the first secondary air line. Mix it with the sprayed material and spray it on the inner wall of the tunnel, etc.

In the present invention, fiber refers to fiber made of glass, various plastics, or steel, the main agent refers to a hardening agent such as cement milk or mortar gypsum-based hardening resin, and the quick-setting agent refers to calcium sulfo aluminate-based hardening agent. , includes inorganic salts, etc. Further, it is desirable to select a hose 32 that prevents the generation of static electricity caused by transporting a large number of fiber pieces. Furthermore, in the present invention, when transporting fiber pieces over long distances, the second
For example, the ejector 22 in the secondary air line of 10
They can also be arranged in series every m.

When using the fiber conveying device of the present invention having the above configuration, the compressor 11 is operated and the manual valve 12 (an automatic valve may also be used) is used.
Leave lever 1 of spray gun 100 open.
When 06 is pulled one step, the valve 107 simultaneously retreats and opens the introduction passage 108, allowing the air forced through the hose 31 to flow from the branch passage 109 and the injection passage 110 into the nozzle 101 of the spray gun 100. Spray from the tip. In this way, the lever 106
the first secondary air line 10 by air injection by
The pressure inside the pipe No. 2 suddenly drops, and this is input as a signal by the pressure gauge with contacts, which is an electrical control unit.This signal starts the quick setting agent pump (not shown), and after a few seconds, the main agent pump starts. (not shown). When the quick-setting agent pump is activated, the quick-setting agent is force-fed through the hose 111 to the supply port 112, and then flows through the flow path 113 and the discharge port 1.
14 and flows into the tip of the nozzle 101 of the spray gun, and is injected from the tip of the nozzle 101 by air jet from the injection path 110. In this state, when the lever 106 is pulled to the second stage, the valve 115 moves back and the discharge pipe 116 is opened, so that the base agent from the base agent pump (not shown) flows through the hose 117, the supply port 118, and the discharge pipe 116. Similarly, the liquid is ejected from the tip of the nozzle 101 while being mixed with the quick setting agent by air from the injection path 110.

On the other hand, by pulling the lever 106 one step, the pipe internal pressure of the first secondary air pipe line 102 suddenly drops, and an electric control unit consisting of a pressure gauge 25 with contacts and a solenoid valve 26 electrically interlocked with the pressure gauge 25 causes Solenoid valve 26
is opened to drive the fiber cutter 19 of the third secondary air conduit, and the supplied fiber thread 21 is
is cut, and the fiber nozzle 105 blows out the mixture of the quick-setting agent and the main agent, and the mixture is continuously sprayed onto the sprayed surface such as the inner wall of the tunnel, and is rapidly hardened.

Next, when spraying is interrupted or completed, when the lever 106 is returned by the elasticity of the spring 119, the valve 107 closes the introduction passage 108 and closes the injection passage 110.
The injection of air is stopped, and the fiber cutter 19 is stopped by the electric control section due to a sudden increase in the pressure inside the first secondary air line, and the valve 115 is also returned by the spring 120 to close the discharge pipe 116. Due to this closure, the main agent pumping pressure increases rapidly,
This is detected by a separately provided detector, and the electric control device inputting the signal stops driving the main agent pump, and after a few seconds also stops driving the quick setting agent pump.

In this way, the lever 1 of the spray gun 100
By performing the operation 06, the nozzle man can easily start and stop spraying at his hand,
Moreover, it is possible to prevent clogging of the inside of the nozzle 101 due to mixing and curing of the main resin and quick-setting agent when stopping.
In addition, in the present invention, the conveyance of the fiber pieces is stopped even if the pressure feeding path is clogged with the main agent and quick-setting agent.

As described above, the present invention installs a fiber nozzle in a spray gun that sprays the main agent and quick-setting agent,
This is made so that the fiber pieces are continuously discharged from a remote location at the rear, making the spray gun equipped with a fiber nozzle lighter and easier to handle. In addition, the present invention eliminates the need for fiber roving as well as the need for a narrow conveying device such as an air motor to be transported to a humid spraying work site, thereby eliminating operational inconveniences such as tangles of fiber threads. This also prevents yarn breakage due to moisture adhesion to the fiber yarn and damage to the fiber cutter due to stone powder adhesion. Furthermore, the present invention has a wide range of applications, such as not only the fiber conveying device being used for spraying the main compound and quick-setting agent onto the spraying surface, but also the conveying device alone can be used in concrete mixers and the like.

[Brief explanation of drawings]

Figure 1 is a longitudinal sectional view of a spray gun equipped with a conventional fiber sprayer, Figure 2 is a plan view of the conveyor box of the present invention with the lid removed, Figure 3 is a left side view of Figure 2, and Figure 4. 2 is a front perspective view of FIG. 2, FIG. 5 is a system diagram of the conveying device of the present invention, and FIG. 6 is a vertical sectional view of a spray gun and a fiber nozzle installed above it. 11...Compressor, 100...Spray gun, 101...Spray gun nozzle, 102
...First secondary air conduit, 105...Fiber nozzle, 22...Ejector, 103...Second secondary air conduit, 17...Air motor, 19...
Fiber cutter, 21...Fiber thread, 1
04...Third secondary air pipe line, 107...Spray gun valve.

Claims (1)

[Scope of utility model registration request] a first secondary air conduit provided so that a part of the primary air from the compressor is used to eject an accelerating agent and a main agent supplied to a spray gun installed at a distance from a nozzle of the spray gun; and a second secondary air conduit for blowing out the fiber piece from a fiber nozzle installed near the spraying surface together with the quick-setting agent and the main agent, and rotating the fiber cutter with the remainder of the primary air. The third step is to cut the fiber thread into fiber pieces.
A secondary air pipe is provided, and the quick-setting agent and the main agent are injected from the nozzle of the spray gun by opening a valve in the spray gun.
When the internal pressure of the secondary air pipe decreases, the third secondary air pipe is opened to blow out the fiber piece from the fiber nozzle, and the valve in the spray gun is closed to blow out the fiber piece from the first air pipe. When the internal pressure of the secondary air pipe increases, the third secondary air pipe is closed and the rotation of the fiber cutter is stopped, thereby controlling the blowing out of the fiber piece from the fiber nozzle. A fiber conveying device consisting of an electric control section.