JPS58166954A - Operating device of concrete spraying nozzle - Google Patents

Abstract

PURPOSE:To spray concrete to uniform thickness, to reduce its splash-back quantity, and to smooth its finished face, by rocking a nozzle like a circular arc on the same plane, and also constituting so that one of rocking radiuses of the tip and the base end of the nozzle can be adjusted. CONSTITUTION:Length of a connecting rod 48 is adjusted so that a nozzle 51 is always orthogonal to a concrete spraying face, and after that, a sub-arm 34 is moved in the direction as indicated with an arrow D, rocking the nozzle 51 by driving oil pressure rocking motors 43, 47, and simultaneously, by driving a concrete supplying device, concrete is sprayed to the spraying face. Thereafter, the sub-arm 34 is made to execute a reciprocating motion in the directions as indicated with arrows C, D, turning a main arm 31 in the direction as indicated with an arrow B, and also the nozzle 51 is rocked, by which concrete spraying is executed extending over the whole circumference of a tunnel wall W. Accordingly, concrete is sprayed so as to be always orthogonal to the spraying face, therefore, the splash-back quantity of concrete is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an operating device for a concrete spraying nozzle for swinging a concrete spraying nozzle along a concrete spraying surface of a tunnel pile machine or the like.

As a method for excavating tunnels, the so-called NATM method is widely known, in which a hole is made in the tunnel wall, a rock bolt is pushed into the hole to stabilize it, and concrete is sprayed on the tunnel shaft, and this is used as a support. It is being

In the NA'l'M construction method, concrete spraying is a very one-step process, and conventionally, concrete spraying company members hold the nozzle in their hands and discharge concrete from the nozzle. This was done by transferring the dye.

However, with this conventional concrete spraying method, companies and workers have to worry about concrete splashing,
Suddenly, the powder layer flies up! # There was a risk of writing a 911 pIL because the harvest had to be carried out within the boundaries. In addition, it takes a considerable amount of time to spray concrete to a uniform thickness on the sprayed surface, and the thickness of shotcrete is greatly influenced by the ability of the worker, so there is a certain level of quality as shotcrete. There was a lull.

For this reason, companies have recently introduced concrete spraying guards, such as those shown in Figures 1 (Xun, (b) to 3 (B), respectively) to keep all workers away from the concrete spraying site. !I'm trying to cut out the four boundaries.

However, each company has its own drawbacks when it comes to concrete spraying as mentioned above. In other words, Yuu 1 (
The concrete spraying machine driven in a) and (b) has heavy wheels 1 (
Z) The base end of an arm 2 constituting a horizontally extending rank structure is attached to the base so as to be movable about a horizontal axis 5, and the nozzle support 3 is attached horizontally to the tip of the arm 2, A concrete spraying nozzle 4 is vertically attached to a nozzle support 3 so as to be slidable in the front and rear directions with respect to the bracket nozzle support 3, and the nozzle is inserted while rotating the arm 2 in the left-right direction of the vehicle 1. 4 is reciprocated in the forward and backward direction of the wheel 10 while spraying concrete from the tip of the nozzle 4 into the tunnel @ excavation W. Since the configuration is only to reciprocate the nozzle 4 at a rate, the nozzle 4Q is placed at the turning point. There was a drawback that the thickness of the concrete on the corresponding spraying surface became thicker.

In addition, the concrete spraying machine shown in gzW(a) and (b) has a nozzle support 9 or a horizontal direction via a main arm 7 and -M8 on a base 6 mounted on a vehicle 5 in a horizontal direction. The nozzle is mounted on the nozzle support base 9 so as to be movable in the vertical direction, and is pivotable in the vertical direction about an axis disposed in the longitudinal center of the nozzle so as to be horizontally movable on the nozzle support 9. It is movably attached, and concrete is sprayed into the tunnel shaft iW while swinging the nozzle 11 while moving the nozzle support stand 9 in the front-back direction.

That is, in order to reduce the concrete thickness of the spraying surface corresponding to the swing turning point of the nozzle 11, the nozzle l] is inclined with respect to the spraying surface in the vicinity of the swing turning point. By the way, in the case of concrete spraying, there is a problem in that when concrete is applied diagonally to the spraying surface, a portion of the concrete will bounce off and fall onto the road, resulting in a large number of concrete splashers. Therefore, the concrete spraying machine described by MiJ has the disadvantage that the amount of concrete splashing increases on the spraying surface corresponding to the swing turning point, resulting in a large amount of material being wasted.

In addition, a nozzle gripping member is connected to a base 13 which is rotatable in the horizontal direction and is electrically loaded with Vc through a bendable arm 14 on the concrete spraying frame 12 shown in M31# (a) and (b). 15 is attached to the nozzle gripping member 15, and a concrete spraying nozzle 16 is movably attached to the nozzle gripping member 15. As shown in Fig. 3(b), the concrete spraying nozzle 16 is attached to Concrete is sprayed onto the tunnel TA wall w by rotating the nozzle 16 so that the lIL mark at the tip of the nozzle 16 continuously draws the character "no".

The present invention has been made in view of the above-mentioned circumstances, and it is possible to create a layer that makes the concrete thickness uniform, reduces the amount of rebound of the concrete, and provides a layer that makes the finished surface smooth. The object of the present invention is to provide an IJ device for producing a spray nozzle.

Hereinafter, practical examples of the present invention will be explained with reference to FIGS. Figure 4 shows an example of a concrete spraying machine equipped with a concrete spraying phase nozzle according to the present invention. It is.

Traveling trolley 2111'i, base 23, operator 24 and hydraulic unit) 25t each are south, and i platform 23
It moves in the front and back direction by being driven by a caterpillar 26 attached to the lower part 114 or a small φm&7j source. Outriggers 27 are attached to the four corners of the base 23 to securely support the traveling platform 21, and mounting plates 28 and 29 are attached to predetermined upper parts 1 at intervals in the front direction. The -Jb end of the main arm 31 is attached between the mounting plates 28 and 29 via @30 so that it can be driven vertically. It is designed to be rotated in the direction. The main arm 31 is
The U-shaped receiver consists of a base 32, and a plate-like plate (not shown) that is slidably fitted into a hole extending vertically in the figure, which is formed in each of the twin pillars of the base 32. By being moved by a driving source, it can be extended and operated in the length direction as a metal rod.

A support stand 34 having a tapered shape at the tip of the main arm 31 is attached parallel to the shaft 30, and
An i-long secondary arm 3s is fitted into the taper #lIK and is supported so as to be movable in the length direction, and this secondary arm 35 is operated to move in the direction of lightness by being driven by a drive source of no small amount. It has become so. Light projectors 36 and 37 are attached to the narrow arm 35, one end and the center of which are respectively attached, and a sensor 38 is fixed to another part of the center. The sensor 38 includes an electrical circuit (not shown) and an electric circuit (not shown).
An ultrasonic wave wiA-needle is formed in the groove, and the distance between the concrete spraying nozzle 51 and the concrete spraying surface, which will be described later, can be adjusted to the needle side.

A direction control device 39 is attached to the other end of the secondary arm 35. The direction control device '149 has a rotary body 40 which is movable with respect to the thin arm 35 via the axis a, and a rotary body 40 which is movable with the narrow arm 35, as shown in FIG. It consists of a mounting ridge 42 that is movably attached to a rotating body 41 via an axis β that intersects with the axes α and β in Hirayama via @l that are perpendicular to the axes α and β, respectively, These members 40, 41, and 42 are simultaneously operated by a drive source (not shown), so that the direction of the mounting plate 42 relative to the narrow arm 35 can be set arbitrarily.

Next, the output shaft 4 of the hydraulic swing motor 43 protrudes from the other side of the concrete spraying nozzle actuator 22 and the pile plate 42.
One end of a connecting rod 44 is fixedly attached to the connecting rod 44, and a nozzle mounting member 4s is attached to the other end of the connecting rod 44 via a shaft 46 that is parallel to the output shaft of the hydraulic swing motor 43. Attached for simultaneous movement. In addition, the mounting plate 42
At the bottom thereof, a hydraulic swing motor 47, which has an output shaft 47a in the same manner as described above, and swings in synchronization with the hydraulic swing motor 43, a linked shaft 1148, a shaft 49, and a nozzle mounting auxiliary material 5° are attached. Tell.

The connecting rod 48 is formed by, for example, a piston at the tip of a piston rod inserted into a cylinder, and its length can be automatically adjusted by external operation.

A concrete spraying nozzle 51 is attached to the nozzle mounting member 45.50, and this concrete spraying nozzle 51 is connected to the supporting ship hydraulic swing motor 43.4.
By driving 7, the sweetfish 6 diagram (&) or the viewing 6
As shown in &u(b), it becomes ψ as if it were a ``wiper'' on a wheel. In addition, the nozzle 51 is connected to a concrete supply device via a 7-hour pipe pipe 52, and concrete is discharged from the tip of the nozzle 51.

Next, taking as an example the case of spraying concrete onto the tunnel wall W using the concrete spraying machine with the above configuration, we will explain how to make a concrete spraying nozzle.
The traveling bogie 2 is moved so that the long axis of 5 is along the longitudinal diagram of the tunnel.
1, and then the outrigger 27 controls the horizontal posture of the traveling carriage 21. Next, the main arm 31 is simultaneously moved in the direction of arrow 1=IJAjj in Fig. 4, so that the narrow arm 34 faces the surface to which concrete will be first sprayed, and the sub arm 34 is moved to the movement limit position in the direction of arrow C. Adjust the length of main N31 as follows. Also, tunnel pit *
When the W O cross section is elliptical and the center of curvature of the concrete spraying surface is shifted from the center position of the tunnel @ wall W where the traveling trolley stops, direction 11KII
[Operate the direction of the nozzle 510 by position 39 so that it intersects iIl with respect to the concrete spraying surface.

Next, the nozzle 51 hits WK against the concrete spraying surface.
After adjusting the length of the connecting rod 48 so that they are perpendicular to each other, the hydraulic swing motors 43 and 47 are driven to move the nozzle 51 as shown in FIG.
a) Move the hJ arm 34 in the direction of the arrow while swinging as shown in K, and at the same time, swing the concrete supply equipment to spray concrete as shown in Figures 7 and 8. Spray on the surface. Thereafter, while the main arm 31 is moved 1g1Ill+ in the direction of arrow B in the shaft 41, the narrow arm 34 is reciprocated in the directions of arrows 0 and D, and the nozzle 51 is swung to spray concrete over the entire surface of the tunnel borehole 1. I do.

According to such concrete spraying, since the concrete discharged from the tip of the nozzle 51 is always sprayed perpendicular to the spraying surface, the amount of concrete splashing is greatly reduced.

In addition, as shown in Figure 7, as the tip of the nozzle 51 moves left and right from the center of swing, it gradually moves away from the spraying direction. The concrete discharged from the concrete spreads over a wide area, so the thickness of both sides where the concrete is sprayed is thinner, as shown in No. a□□□. Therefore, the thickness of the concrete in the spraying direction can be made almost uniform by making the thickness of the next concrete sprayed part overlap the port of the already sprayed part.

Furthermore, if we look at the locus of the tip of the nozzle 51, it has a zigzag shape, so that
The finished surface can be made smoother than the one that draws a J-shaped locus in the U.S. example.

In addition, when the concrete spraying surface is flat, the length of the connecting rod 4'8 is set to be equal to the length of the connecting rod 44.
t, When the nozzle '51 swings as shown in FIG. 6 (0), the nozzle 51 is always perpendicular to the flat concrete dog surface.

In addition, FIGS. 9 and 10 (&) and (b) show other *'1M examples of the present invention. In this embodiment, the mounting plate 4
The swing motor 6 is connected to the swing motor 6 through a bracket 61 having an angled cross-section.
2 is attached to the output shaft 62 & of this swing motor 62.
A connecting rod 63 is fixedly attached to the connecting rod 63, and a connecting rod 64 is connected to the other end of the connecting rod 63 and rotates vertically within one plane of the connecting rod 63 and IWI via an in, etc. Also, one end of the connecting rod 649 is attached to the other end of the rod 649 through a pin or the like so that it rotates in the vertical force direction within the same plane as the connecting rod 63.64. Furthermore, the moving FI6 material 66 is connected to the other end of Gan Tsumugi @65 via a bottle etc. 4! It is attached so that it can rotate in the same plane as #63, 64, and 65, and this moving member 66 is attached as shown in Fig. 10 (b) via the attachment plate 427. It is mounted so that it can be moved horizontally. That is, the swing motor 62, the connecting rod 63.64.6
5 and the moving J member 66 constitute a link 68. Further, a concrete spraying nozzle 70 is fixedly attached to the central portion of the connecting rod 64 via a nozzle attachment member 69 so as to be perpendicular to the retarder 64 . Then, by horizontally moving the moving material 66 in the direction indicated by the arrow in FIG. IIL is now available. Incidentally, if the configuration is made as shown in FIG.

As explained above, according to the concrete spraying nozzle operating device according to the present invention, the concrete spraying nozzle is swung in an inner arc shape on a regular plane, and the oscillating radius of the tip of the nozzle and the nozzle base y- Because the structure is such that at least one of the swing radii of In addition, the configuration is very simple.

[Brief explanation of the drawing]

= s l tW (a), (b) ~ s s IV (a),
(b) is a diagram showing each side of a conventional concrete spraying machine, and FIGS.
The figure is a perspective view showing a concrete spraying machine with an excellent concrete spraying nozzle actuation device according to the present invention, and Fig. 5 is a perspective view of the concrete spraying machine.
The enlarged plan view of part j2, Figures 6 (&) 4, (b), and 7 are diagrams shown to explain the operation of the concrete spraying machine, respectively, and Figure 8 is a diagram showing the concrete spraying machine. Figure #149 is a cross-sectional view of the seasoned concrete sprayed using the same method.
Figures 810 and 810 (&) and (b) are diagrams of each work [excluded for explanation]. W″°゛°°°゛°°Concrete mine river° running script, 2
2. Operation of concrete spraying nozzle, 4
3.47... Hydraulic swing motor, 44.48 Connecting rod, 51... Concrete spraying nozzle, 62
...°・Swing motor, 63.64.65・Curved connection extension,
66 Pa°°・Moving piece, 68...Link Gase, 7
0...6. Nozzle for concrete spraying. Figure 5 Figure 6 (a) (b)

Claims (1)

[Claims] A synchronous rocking mechanism is provided between the nozzle support stand and the concrete spraying nozzle to plow the nozzle in an arc shape on the same plane for N periods, and a half-pole of the nozzle is provided with a half-pole of rocking at the tip of the nozzle. An actuating device for a concrete spraying nozzle, in which at least one of the swing radius of the base end of the concrete spraying nozzle is IIIEL, and the plowing half 1I14 is 01m.