JP2847451B2 - 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 needs to 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, the surroundings between a pair of spaced apart main pulleys 1 having the same diameter are provided. A plurality of blades 2 are arranged, the blades 2 are fixed to each main pulley 1, and a plurality of auxiliary pulleys 3 are arranged around each main pulley 1 connected by the blades 2.
And at least one auxiliary pulley 3 is connected to a pulley driving device 4, and an endless belt 5 is wound around the main pulley 1 and the outer periphery of each auxiliary pulley 3. The supply device 6 is connected. In addition, in order to obtain a uniform concrete projectile material property by regulating the projection angle of the concretes so as to reduce the projection area, the concretes projected in front of the concrete projection side end of the endless belt 5 are projected. Is provided.

[0005]

1 to 5 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 blades 2 are radially arranged at equal intervals, and both ends of each blade 2 are welded to the main pulleys 1 by welding. A pair of main pulleys 1 fixed and connected by a wing plate 2
Around the auxiliary pulley 3 (four in the figure)
Are arranged, and the center axis 8 of each auxiliary pulley 3 is arranged in parallel with the center line of each main pulley 1, and at least one
The central shaft 8 of the auxiliary pulley 3 is connected to a pulley driving device 4 composed of an electric motor with a transmission, and annular guide grooves 9 are provided on both sides of each auxiliary pulley 3 in the longitudinal direction.
Is provided.

A rubber endless belt 5 is wound around the pair of main pulleys 1 and the auxiliary pulleys 3 in a tensioned state, and guide ridges 10 provided integrally on both sides in the width direction of the inner surface of the endless belt 5. A plate-shaped projection guide member 7 for guiding concrete to be projected is disposed in front of the concrete-projection end of the endless belt 5 in the annular guide groove 9 of each auxiliary pulley 3.
The distal end portion of the supply outer cylinder 11 having a circular cross section is fitted into a through hole 12 provided at the center of the pair of main pulleys 1, and each main pulley 1 is connected to the supply outer cylinder 11 through a bearing 13. It is supported rotatably.

At a position close to the outer side of each main pulley 1, a supporting frame 14, 1
5 is rotatably fitted, and the center shaft 8 of each auxiliary pulley 3
Is supported by support frames 14 and 15 via bearings 17, and the pulley driving device 4 is fixed to a pedestal 18 provided integrally with the support frame 15. Both ends of the projection guide member 7 are fixed to the support frames 14 and 15.

A frame driving device 20 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 11, and the frame driving device 20
The drive gear 21 fixed to the output shaft of the support frame 1
5, the ring gear 22 is arranged concentrically with the main pulley 1, and the support frames 14, 15 are provided with bearings 23 provided outside the outer cylinder 11 for supply. It is supported and rotated by the main pulley 1.

Both ends of the shaft of the screw conveyor 24 disposed in the supply outer cylinder 11 are supported via bearings by the supply outer cylinder 11, and the shaft of the screw conveyor 24 is a conveyor comprising a motor with a reduction gear. The conveyor driving device 25 is connected to an output shaft of a driving device 25, and the conveyor driving device 25 is fixed to a support base 26 provided integrally with a base end portion of the supply outer cylinder 11, and furthermore, an upper portion of the supply outer cylinder 11 on the base end side. Is connected to a concrete supply pipe 27 and a quick-setting agent supply pipe 28, and a discharge port 29 is provided at a lower portion on the distal end side of the supply outer cylinder 11 between a pair of main pulleys 1. An arm 31 having a plurality of pin holes 30 is fixed to a lower portion of the outer casing 11 for use. Furthermore, a plurality of discharge blades 32 are radially fixed at equal angular intervals around the axis of the screw conveyor 24 at a position facing the discharge port 29 at the end of the supply outer cylinder 11.

The turning support table 34 of the traveling vehicle 33 includes:
The base end of the first boom 36 raised by the hydraulic cylinder 35 is pivotally connected by a horizontal axis, and the second boom 3 pivoted by the hydraulic cylinder 37 is attached to the distal end of the first boom 36.
8 is pivotally connected by a horizontal shaft 39, the distal end of the second boom 38 is joined to the arm 31 by a pin, and a bracket provided on the proximal end of the second boom 38 and the arm 31 is connected to the rotating hydraulic cylinder 40.

The pulley driving device 4 and the conveyor driving device 25 are operated, and concrete 41 is supplied from the concrete supply pipe 27 into the supply outer cylinder 11, and the quick-setting agent 42 is supplied from the quick-setting agent supply pipe 28. When supplied, the concretes 41 and the quick setting agent 42 are transported while being mixed by the screw conveyor 24, and fall from the discharge port 29 of the supply outer cylinder 11 to the inner surface of the endless belt 5,
Next, the concretes 41 which are forcibly transferred at a high speed by the blade plate 2 fixed to each main pulley 1 and the endless belt 5 driven by circulation and mixed with the quick-setting agent are guided by the projection guide member 7 to be tunneled. 43 inner wall surface 44
It is projected toward and sprayed.

The frame driving device 20 is operated to rotate the support frames 14 and 15 and the parts supported thereby around the supply outer cylinder 11 so that the inner wall surface 44 of the tunnel 43 is Concrete 41 mixed with quick-setting agent 42 can be projected and sprayed over the entire side and upper part, and the hydraulic cylinder 40 for rotation can be extended or shortened so that the tip of the second boom 38 is centered. By rotating the concrete type spraying machine as above, even in a state where the traveling vehicle 33 is stopped, the projection spraying position of the concrete 41 mixed with the quick-setting binder 42 is
It can move over a certain width in the longitudinal direction of the tunnel. In a state where the traveling vehicle 33 is stopped, concrete 41 mixed with the quick-setting agent 42 is projected and sprayed over a certain width in the longitudinal direction of the tunnel, and then the traveling vehicle 33 is moved forward by a distance corresponding to the predetermined width. Move and stop,
Again, the concrete 41 mixed with the quick setting agent 42 is sprayed and sprayed.

As in the above embodiment, each auxiliary pulley 3 is provided with an annular guide groove 9 and a guide ridge 10 integrally provided on the inner surface of the endless belt 5 is provided with the annular guide groove 9.
, The meandering of the endless belt 5 can be prevented.

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.

[0015]

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. There is no need to use expensive equipment for generating air, and a plurality of blades 2 are arranged around a pair of spaced apart main pulleys 1 of the same diameter. 2 is fixed to each of the main pulleys 1, so that the concrete supply device 6
Can supply the concretes 41 almost uniformly to the endless belt 5 between the main pulleys 1 and the concretes 41 supplied to the endless belt 5
Can be forcibly transported and projected, and by changing the circulation speed of the endless belt 5, the projected spray distance and the projected spray force of concrete can be easily adjusted, and compressed air is used. Since the concretes are projected and adhered without being used, the adhesion of the concretes is good. In addition, by providing the projection guide member 7 for guiding the concrete to be projected in front of the concrete-projection side end of the endless belt 5, the projection angle immediately after the projection of the concrete is regulated, and the projection area can be reduced. Therefore, it is possible to make the material properties of the concrete adhered by projection uniform.

[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 longitudinal sectional side view showing a part of FIG. 1 in an enlarged manner.

FIG. 3 is a sectional view taken along line AA of FIG. 1;

FIG. 4 is a partially longitudinal side view showing an example in which the present invention is applied to a concrete-type projection spraying machine for tunnels.

FIG. 5 is a schematic front view partially in vertical section of FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main pulley 2 Blade plate 3 Auxiliary pulley 4 Pulley drive device 5 Endless belt 6 Concrete supply device 7 Projection guide member 8 Center shaft 9 Annular guide groove 10 Guide ridge 11 Supply outer cylinder 12 Through hole 14 Support frame 15 Support frame Reference Signs List 20 frame drive device 21 drive gear 22 ring gear 24 screw conveyor 25 conveyor drive device 27 concrete supply pipe 28 quick-setting agent supply pipe 29 discharge port 31 arm 32 discharge blade plate 33 traveling vehicle 34 turning support base 35 hydraulic cylinder 36 First boom 37 Hydraulic cylinder 38 Second boom 40 Hydraulic cylinder for rotation 41 Concrete 42 Quick setting agent 43 Tunnel 44 Inner wall surface

Continuation of front page (72) Inventor Tomoya Yasu 2-3-3 Kandaji-cho, Chiyoda-ku, Tokyo Obayashi Corporation Tokyo Head Office (72) Inventor Yoshiro Aihara 2-1-1 Nihonbashi-Muromachi, Chuo-ku, Tokyo Co., Ltd. Inside the Mitsui Miike Works (72) Inventor Norio Kashiwamura 2-28 Asahimachi, Omuta-shi, Fukuoka Prefecture Co., Ltd. (56) References JP-A-2-285150 (JP, A) (58) Fields studied (Int. Cl. ⁶ , DB name) E21D 11/10 E04F 21/08 E04G 21/02 103

Claims (2)

(57) [Claims] 1. A plurality of blades 2 are arranged around a pair of main pulleys 1 having the same diameter arranged at an interval, and the blades 2 are fixed to each of the main pulleys 1. 2
A plurality of auxiliary pulleys 3 are provided around each of the main pulleys 1 connected to each other, and at least one auxiliary pulley 3 is connected to a pulley driving device 4, and an endless belt 5 is provided around the outer circumferences of the main pulley 1 and each of the auxiliary pulleys 3. And a concrete type spraying machine in which a concrete type supply device 6 is connected to the center between the main pulleys 1. 2. A concrete-type spraying machine according to claim 1, wherein a projection guide member 7 for guiding the concrete to be projected is provided in front of the concrete-projecting end of the endless belt 5.