JP3020331B2 - Concrete type spraying machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete-type spraying machine used for projecting and spraying concrete on the inner surface of a tunnel, the wall and floor of a building, the slope of the ground, and the like. .

[0002]

2. Description of the Related Art Conventionally, as a concrete spraying machine,
2. Description of the Related Art There is known an apparatus in which concrete is pumped through a pipe and a hose by compressed air, and the concrete is blown toward a sprayed portion from a nozzle connected to a tip of the hose.

[0003]

In the case of the above-mentioned conventional concrete spraying machine, since the concrete is sprayed using compressed air, the sprayed powder is scattered and the visibility of the worker becomes poor. And also has a negative effect on the human body. Further, in order to perform long-distance injection or strong injection, the pressure of the compressed air must be significantly increased, so that the influence on the field of view of the operator and the human body is further deteriorated.

[0004]

SUMMARY OF THE INVENTION In order to advantageously solve the above-mentioned problems, in the concrete type spraying machine according to the present invention, a plurality of spaced apart main pulleys 1 having the same diameter are arranged around a pair. , At least one auxiliary pulley 2 is connected to a pulley driving device 3, and an endless belt 4 is wound around the main pulley 1 and the outer periphery of each auxiliary pulley 2. A pair of support frames 11 and 12 for supporting the auxiliary pulley 2 are connected to a concrete supply device 5 at the center so that the concrete can be projected in an arbitrary direction.
Can be rotated by the frame driving device 13 on the same center line as the rotation center of the main pulley 1. Further, in the concrete projecting spraying machine according to the first aspect, a concrete supply device 5 is passed through a central portion of the main pulley 1 to reliably supply concrete between the pair of main pulleys 1 by mechanical force. A supply outer cylinder 6 for supplying concrete between the pair of main pulleys 1; a screw conveyor 8 accommodated in the supply outer cylinder 6 and rotated by a conveyor driving device 7; It is composed of a concrete supply pipe 9 and a quick-setting agent supply pipe 10 connected to the cylinder 6, and a pair of support frames 11, 12 are rotatably fitted to the supply outer cylinder 6.

[0005]

1 to 4 show a concrete type spraying machine according to an embodiment of the present invention. A pair of main pulleys 1 having the same diameter are arranged at an interval, and each main The center of the pulley 1 is arranged on the same straight line,
Around the pair of main pulleys 1, a plurality (four in the illustrated case) of auxiliary pulleys 2 are arranged, and the central axis 14 of each auxiliary pulley 2 is arranged parallel to the center line of each main pulley 1. The central shaft 14 of at least one auxiliary pulley 2 is connected to a pulley driving device 3 comprising a motor with a transmission.
A rubber endless belt 4 is wound around the pair of main pulleys 1 and the auxiliary pulleys 2 in a tensioned state.

The distal end portion of the supply outer cylinder 6 having a circular cross section is
Each of the main pulleys 1 is rotatably supported by a supply outer cylinder 6 through a bearing 16, and is fitted into a through hole 15 provided at the center of the pair of main pulleys 1. At the close position, support frames 11 and 12 are rotatably fitted to the distal end side of the supply outer cylinder 6, and the center shaft 14 of each auxiliary pulley 2 is supported by the support frames 11 and 12 via a bearing 17. The pulley driving device 3 is fixed to a receiving table 18 provided integrally with the support frame 12.

A frame driving device 13 composed of an electric motor with a speed reducer is fixed to a support member 19 provided integrally with an intermediate portion of the supply outer cylinder 6, and a driving gear fixed to an output shaft of the frame driving device 13. 20 is the support frame 12
The annular gear 21 is arranged concentrically with the main pulley 1, and the support frames 11, 12 are provided with bearings 37 provided outside the supply outer cylinder 6 and a main It is supported and rotated by the pulley 1. Both ends of the shaft of the screw conveyor 8 disposed in the supply outer cylinder 6 are supported by bearings by the supply outer cylinder 6, and the shaft of the screw conveyor 8 is a conveyor driving device 7 composed of an electric motor with a reduction gear. The conveyor driving device 7 is fixed to a support base 22 provided integrally with the base end of the supply outer cylinder 6, and further, on the base end side upper part of the supply outer cylinder 6, The concrete supply pipe 9 and the quick-setting agent supply pipe 10 are connected to each other, and a discharge port 23 is provided between the pair of main pulleys 1 at a lower portion on the distal end side of the supply outer cylinder 6. An arm 25 having a plurality of pin holes 24 is fixed to a lower portion of the arm 6. A plurality of discharge blades 36 are radially fixed at equal angular intervals around the axis of the screw conveyor 8 at a position facing the discharge port 23 at the end of the supply outer cylinder 6.

The turning support 27 in the traveling vehicle 26
The base end of the first boom 29 raised by the hydraulic cylinder 28 is pivotally connected by a horizontal axis, and the second boom 3 rotated by the hydraulic cylinder 30 is attached to the distal end of the first boom 29.
A base end of the first boom 31 is pivotally connected by a horizontal shaft 32, a distal end of the second boom 31 is joined to the arm 25 by a pin, and a bracket provided on the base end of the second boom 31 and the arm 25 is connected by a hydraulic cylinder 33 for rotation.

The pulley driving device 3 and the conveyor driving device 7 are operated, and concrete 34 is supplied from the concrete supply pipe 9 into the supply outer cylinder 6 and the quick-setting agent 35 is supplied from the quick-setting agent supply pipe 10. When supplied, the concretes 34 and the quick setting agent 35 are transported while being mixed by the screw conveyor 8, fall from the discharge port 23 of the supply outer cylinder 6 to the inner surface of the endless belt 4, and are then driven in circulation. By the belt 4, concrete 34 mixed with a quick-setting admixture is projected and sprayed toward the inner wall surface 39 of the tunnel 38.

The frame driving device 13 is operated to rotate the supporting frames 11 and 12 and the parts supported thereby around the supply outer cylinder 6 so that the inner wall 39 of the tunnel 38 can be rotated. Concrete 34 mixed with quick-setting agent 35 can be projected and sprayed over the entire side and upper part, and the hydraulic cylinder 33 for rotation can be extended or shortened so that the tip of the second boom 31 is centered. By rotating the concrete type spraying machine as above, even in a state where the traveling vehicle 26 is stopped, the projection spraying position of the concrete 34 mixed with the quick setting agent 35 can be changed.
It can move over a certain width in the longitudinal direction of the tunnel. With the traveling vehicle 26 stopped, concrete 34 mixed with quick-setting agent 35 is projected and sprayed over a fixed width in the longitudinal direction of the tunnel, and then the traveling vehicle 26 is moved forward by a distance corresponding to the fixed width. Move and stop,
Again, the concrete 34 mixed with the quick-setting agent 35 is sprayed and sprayed.

Although the above embodiment is an example in which the present invention is applied to a concrete-type spraying machine for tunnels, the present invention can also be applied to concrete-type spraying machines other than tunnels.

[0012]

According to the present invention, since compressed air is not used, powder is not scattered at the spraying site of concretes, so that the visibility is good, the human body is not adversely affected, and the compression is not performed. It is not necessary to use expensive equipment for generating air, and furthermore, by changing the circulation speed of the endless belt 4, it is possible to easily adjust the projection spraying distance and the projection spraying force of concrete, and furthermore, it is possible to compress the concrete. Since concrete is projected and adhered without using air, the adherence of concrete is good, and the pair of support frames 11 and 12 supporting the auxiliary pulley 2 are arranged at the same center as the rotation center of the main pulley 1. Since it is configured to be rotatable by the frame driving device 13 on a line, it is possible to project concrete in any direction. The pair of support frames 11 and 12
Is rotatably fitted to the supply outer cylinder 6, so that concrete can be projected in an arbitrary direction with a simple structure.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view showing a concrete type spraying machine according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a partially longitudinal side view showing an example in which the present invention is applied to a concrete-type projection spraying machine for tunnel.

FIG. 4 is a partial vertical front view of FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main pulley 2 Auxiliary pulley 3 Pulley drive device 4 Endless belt 5 Concrete supply device 6 Supply outer cylinder 7 Conveyor drive device 8 Screw conveyor 9 Concrete supply tube 10 Quick-setting agent supply tube 11 Support frame 12 Support frame 13 Frame drive Apparatus 14 Central shaft 20 Drive gear 21 Ring gear 23 Discharge port 25 Arm 26 Traveling vehicle 27 Swivel support base 28 Hydraulic cylinder 29 First boom 30 Hydraulic cylinder 31 Second boom 33 Rotating hydraulic cylinder 34 Concrete 35 Rapid connection Agent 36 Discharge vane plate 37 Bearings

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tomoya Yasu 2-3-3 Kandajicho, Chiyoda-ku, Tokyo Obayashi Corporation Tokyo Head Office (72) Inventor Norio Kashimura 2-28 Asahimachi, Omuta-shi, Fukuoka Prefecture Mitsui Miike Works Co., Ltd. Miike Works (72) Inventor Isamu Isama 2-28 Asahimachi, Omuta-shi, Fukuoka Prefecture Mitsui Miike Works Miike Works (56) References JP-A-63-600 (JP, A) No. 382504 (JP, Y1) (58) Fields investigated (Int. Cl. ⁷ , DB name) E04G 21/02 103 E21D 11/10

Claims (2)

(57) [Claims] 1. A plurality of auxiliary pulleys 2 are provided around a pair of spaced apart main pulleys 1 having the same diameter, and at least one auxiliary pulley 2 is connected to a pulley driving device 3. And an endless belt 4 is wound around the outer periphery of each auxiliary pulley 2, and a concrete supply device 5 is connected to the center between the main pulleys 1.
A pair of support frames 11, which support the auxiliary pulley 2,
12 on the same center line as the rotation center of the main pulley 1
A concrete type spraying machine configured to be rotatable by a frame driving device 13 . 2. A concrete supply device 5 comprising: a supply outer cylinder 6 which is penetrated through the center of the main pulley 1 and supplies concrete between the pair of main pulleys 1; A screw conveyor 8 accommodated and rotated by a conveyor driving device 7, a concrete supply pipe 9 and a quick-setting agent supply pipe 10 connected to the supply outer cylinder 6, and a pair of support frames 11 and 12. For supply
The concrete type spraying machine according to claim 1, which is rotatably fitted to the outer cylinder 6 .