JPH0657950B2 - Long fiber reinforced spraying method for hydraulic materials - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method of spraying a hydraulic material such as mortar onto the ground and spraying it toward a hydraulic material spraying part while vibrating long fibers. Is.

[Conventional technology]

Conventionally, as a method of strengthening the ground surface, Japanese Patent Publication No. 53-47602
As disclosed in Japanese Laid-Open Patent Publication No. 2004-242242, a method is known in which mortars are sprayed from a nozzle toward the ground surface, and long fibers are continuously sent from a fiber feeder to a mortar spraying section.

[Problems to be Solved by the Invention]

In the case of the above-mentioned conventional method, since the long fibers are simply sent out from the fiber feeder toward the mortar spraying part, the long fibers cannot be dispersed almost uniformly in the mortar spraying part, and therefore, the sprayed fibers were sprayed. There is a problem that the mortar cannot be reinforced almost uniformly with long fibers.

It is an object of the present invention to provide a long fiber reinforced spraying method for a hydraulic material that can spray a hydraulic material such as mortar onto the ground and disperse the long fibers almost uniformly in the mortar spraying part. It is what

[Means for Solving the Problems]

In order to achieve the above-mentioned object, in the case of the long fiber reinforced spraying method for hydraulic material of the present invention, a nozzle for spraying hydraulic material 1
To the ground 2, and the fiber vibration spray nozzle 4 vibrated by the vibration drive device 3 sprays the long fibers 5 while vibrating them toward the hydraulic material spraying part.

[Action]

A hydraulic material such as mortar is sprayed from the spray nozzle 1 onto the ground 2, and the long fibers are sprayed from the fiber vibrating spray nozzle 4 toward the hydraulic material spraying portion almost uniformly.

〔Example〕

 The present invention will now be described in detail with reference to the illustrated example.

The drawings show an embodiment of the present invention in which a casing 6 and a spray nozzle 1 for spraying a hydraulic material are connected via a connecting member 7, and a rear portion of a fiber spray guide tube 8 is connected to the casing 6. On the other hand, an annular air injection chamber 11 is constituted by a fiber spray guide tube 8 and a rear end closing cylinder 10 fixed to the outer surface of the fiber spraying guide tube 8 so as to be swingable, and the rear end closing cylinder is further provided. A vibrating cam 13 rotated by an electric motor 12 with a speed reducer fixed to the casing 6 is in contact with one side surface of the casing 10 in the diametrical direction, and the diametrical other side portion of the rear end closed tubular body 10 and the casing 6 are connected. And a pressing spring 14 acting to press the rear end closed tubular body 10 against the vibration cam 13 in a compressed state, the vibration cam 13 rotated by the reduction gear motor 12 vibrates the vibration. Drive 3 It has been made. Further, one end of the air supply hose 15 is connected to the compressor 16, and the other end of the air supply hose 15 is connected to the air injection chamber 11, and is vibrated (swings) by the vibration drive device 3. A fiber vibrating spray nozzle 4 is constituted by the rear end closed cylinder 10 and the fiber spray guide tube 8 fixed through the rear end closed cylinder 10.

A supply drive device 18 including an electric motor with a speed reducer is fixed to the support base 17, a horizontal bottom plate 19 is fixed to the upper surface of the support base 17, and a large number of vertical holes 20 for storing hydraulic material are provided in the periphery. The rotating body 21 is placed on the bottom plate 19, and the driven shaft 22 is inserted and fixed in the center of the rotating body 21.
The driven pulley 23 is fixed, the transmission belt 25 is wound around the driven pulley 23 and the drive pulley 24 fixed to the output shaft of the supply drive device 18, and the position separated from the support base 17 on the bottom plate 19 is provided. And the rotating body 2
The discharge cylinder 26 communicating with the vertical hole 20 of 1 is integrally provided,
Further, an annular air supply chamber 28 is provided between the discharge cylinder 26 and a lower end open casing 27 surrounding the discharge cylinder 26.

Air pipe 30 whose one end is connected to the compressor 29
The other end portion of the lid plate 31 is connected to the annular air supply chamber 28, and the lid plate 31 disposed above the discharge tube 26 in contact with or close to the upper surface of the rotating body 21 connects the bottom plate 19 to the connecting member 32. The other end of the extruding air supply pipe 33, which is fixed via the air supply pipe 30 and has one end connected to the air supply pipe 30, has a cover plate 3
1 and is opened downward toward the vertical hole 20. Further, the spray nozzle 1 and the opening of the lower end open casing 27 are connected via a pressure-feeding hose 34,
A hopper 35 for supplying a hydraulic material is provided above the vertical hole 20 in the rotating body 21.

The long fiber winding bobbin 36 is accommodated in a bobbin case 37 in a vertical orientation, and the bobbin case 37 has an upper portion on which the thread guide pipe 3
8 is attached, the yarn guide pipe 38 thereof extends toward the fiber spray guide pipe 8, and the long fibers 5 fed from the fiber winding bobbin 36 pass through the yarn guide pipe 38 to form fibers. It is supplied into the spray guide tube 8. The illustrated device is mounted on a traveling vehicle (not shown) having a traveling drive device, and is moved in a direction intersecting with the vibration direction of the fiber vibration spray nozzle 4.

In the illustrated apparatus, the electric motor 12 with reduction gear, the compressor 16, the supply drive device 18, and the compressor 29.
When a hydraulic material 39 such as mortar is supplied from the hydraulic material supply hopper 35 to the hydraulic material storage vertical hole 20 of the rotating body 21, the hydraulic material 39 is rotated.
When the hydraulic material 39 in the vertical hole 20 for storing the hydraulic material reaches the upper position in the discharge tube 26, it is pushed downward by the air pressure sent from the air pipe 33 for extrusion and then sent by the rotation of 1. The compressed air is supplied from the trachea 30 through the annular air supply chamber 28 into the pressure supply hose 34, and the compressed air is sprayed from the spray nozzle 1 onto the surface of the ground 2.

On the other hand, the long fibers 5 fed from the long fiber winding bobbin 36
Is sucked by the fiber vibration spray nozzle 4, and is sprayed by the vibration (swing) of the fiber vibration spray nozzle 4 while reciprocating in the direction parallel to the ground surface with respect to the spray part of the hydraulic material, and further spraying. The nozzle 1 and the fiber vibration spraying nozzle 4 are moved along the surface of the ground 2 in a direction intersecting the vibration direction of the fiber vibration spraying nozzle 4 (for example, a right angle direction), and the long fiber-reinforced hydraulic material is applied to the surface of the ground 2. Layer 40 is formed.

When carrying out the present invention, any device other than the illustrated device may be adopted as a device for feeding the hydraulic material to the spray nozzle 1 under pressure. Further, a plurality of sets of the fiber vibration spray nozzle 4, the long fiber winding bobbin 36 and the yarn path pipe 38 may be used in combination for one spray nozzle 1.

As the long fiber 5, for example, glass fiber or polyester fiber can be used, and the form of the long fiber 5 may be a non-twisted fiber bundle or a twisted yarn.

〔The invention's effect〕

Since the present invention is configured as described above, it has the following effects.

A hydraulic material such as mortar is sprayed from the spray nozzle 1 to the ground 2, and the long fibers are sprayed by being vibrated by the fiber vibration spray nozzle 4 while being dispersed substantially evenly toward the hydraulic material spraying part. The hydraulic material sprayed on can be reinforced almost uniformly by the long fibers.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a partially longitudinal side view showing a state in which long fiber reinforced spraying of a hydraulic material is performed, and FIG. 2 is a vicinity of a fiber vibration spray nozzle. FIG. 3 is a vertical cross-sectional side view showing the hydraulic material supply device, and FIG. 4 is a cross-sectional view taken along the line AA of FIG. In the figure, 1 is a spray nozzle, 2 is a ground, 3 is a vibration driving device, 4 is a fiber vibration spray nozzle, 5 is a long fiber, 6 is a casing, 8 is a fiber spray guide tube, 9 is a horizontal axis, and 10 is a rear. End closed cylinder, 11 air injection chamber, 12 electric motor with speed reducer, 13 vibration cam, 14 pressing spring, 15 air supply hose, 16 compressor, 17 support stand, 18 supply Drive device, 19 is a bottom plate, 20 is a vertical hole for storing hydraulic material, 21 is a rotating body, 22 is a driven shaft, 26 is a discharge tube, 2
7 is a lower end open casing, 28 is an annular air supply chamber, 29 is a compressor, 30 is an air supply pipe, 31 is a cover plate, 33 is an air supply pipe for extrusion, 34 is a pressure supply hose, 35 is a hopper for supplying hydraulic material, 36 Is a bobbin wound with long fibers, 38 is a yarn path pipe,
Reference numeral 39 is a hydraulic material, and 40 is a long fiber reinforced hydraulic material layer.

Claims (1)

[Claims] 1. A hydraulic material is sprayed from a spray nozzle 1 toward a ground 2, and a fiber vibration spray nozzle 4 vibrated by a vibration driving device 3 vibrates long fibers 5 toward a hydraulic material spray portion. Spraying method for long fiber reinforced spraying of hydraulic material.