JPS6350520B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a work vehicle used in tunnel construction for spraying concrete such as mortar onto the walls of the tunnel, or for cleaning such as washing the walls with water, and its purpose. The object of the present invention is to provide a tunnel construction work vehicle that can perform concrete spraying, cleaning work, etc. inside a tunnel extremely safely and efficiently.

Hereinafter, the illustrated embodiment embodying the present invention will be described in detail. In the figure, reference numeral 1 indicates a truck-type vehicle, and a frame 3 for a guide rail is placed on a deck 2 of the loading platform. The body 3 has guide rails 4, 4 each having a U-shaped cross section formed in the front-rear direction (in the left-right direction in FIG. 1) on both inner edges thereof, and an auxiliary rail 5 parallel to the guide rails 4 approximately in the center. It is formed. Then, in the auxiliary rail 5 there is a first
A fluid pressure cylinder 6 is arranged, and this first fluid pressure cylinder 6 is located at the tip of its piston rod 7 (the third
The right end in the figure) is supported by the frame 3 via a bracket 8, and is moved forward and backward along the auxiliary rail 5 by the action of supplying and discharging fluid.
Further, the first fluid pressure cylinder 6 has its front and rear ends (third
Guide pulleys 10 to 10 are rotatably supported on both sides (left and right ends in the figure) via brackets 9, 9, and these guide pulleys 10 to 10 are located on both sides of the auxiliary rail 5 and are connected to the first fluid pressure cylinder 6. At the same time, connecting cables 11, 11 such as chains, which are moved along both sides of the auxiliary rail 5 and whose ends are fixed to the frame body 3 and a support frame to be described later, are spanned.

The support frame 12 has a triangular shape on both sides, a vertical front and bottom surface, a horizontal square shape, and an oblique rear surface, and is placed on the frame 3 so as to be movable back and forth. A plurality of guide rollers 14 to 14 are rotatably attached to the side members 13 and 13 on both sides forming the bottom surface, respectively, and these guide rollers 14 to 14 can roll within the guide rails 4 and 4 of the frame body 3. The supporting frame 12 is guided in its longitudinal movement with respect to the guide rails 4, 4. A part of the bottom surface of this support frame 12 is provided with the connecting cable 1.
1 is attached to one end of the support frame 12, so that the support frame 12 can be moved back and forth via the connecting cable 11 by the forward and backward movements of the first hydraulic cylinder 6. The amount of movement is set to be about twice as much as the amount of movement of . Additionally, brackets 16 are provided at the upper and lower portions of the support members 15, 15 on both sides forming the front surface of the support frame 12.
A set of two swing arms 17, 17 via 16
are supported so as to be swingable in the vertical direction, and the tips of the swinging arms 17, 17 on both sides extend to the rear (left side in Fig. 1) of the deck 2 of the vehicle 1, and are used for high-altitude driving. Two swing arms 17, 17 are respectively supported on the deck 18 so as to constitute a parallel link mechanism. Thus, the swing arms 17, 17 on both sides are connected to piston rods 20, 2 of two second fluid pressure cylinders 19, 19 swingably supported on a part of the front surface of the support frame 12.
0 tip is pivotally connected to this second fluid pressure cylinder 1
The deck 18 for high-altitude operation is always kept horizontal with respect to the support frame 12 by being swung parallel to the vertical direction by the forward and backward movement of the piston rods 20 and 20 associated with the supply and discharge of fluid to and from the piston rods 9 and 19. It is designed to move up and down while holding the button.

The deck 18 for high-altitude operation is formed in the shape of a box with a bottom, and a support member 21 on the front side of the deck 18 (left side in FIGS. 1 and 5) is provided with a support member 21 for rotating a boom 28, which will be described later. A support shaft 22 is rotatably supported, and an eccentric mounting plate 23 for attaching a boom eccentrically to the axis of the support shaft 22 is fixed to the tip of the support shaft 22 protruding from the support member 21. A balance weight 24 is fixedly suspended from the mounting plate 23, and a bifurcated bracket 25 for mounting a boom is fixed to a portion eccentric to the support shaft 22. Note that a worm wheel 26 is fixed to the outer periphery of the support shaft 22, and this worm wheel 26
Two worms 27, 27 rotated by hydraulic motors 62, 62 are engaged with the outer periphery of the
As a result, the support shaft 22 reciprocates, and the eccentric mounting plate 2
3 is designed to be reciprocated about the support shaft 22 integrally with the bracket 25 and the balance weight 24.

The boom 28 is connected to the outer boom 29 and the outer boom 2.
The end of the outer boom 29 is swingably supported by a support pin 31 to the upper part of the bracket 25, and a part of the outer boom 29 is The tip of a piston rod 34 of a third hydraulic cylinder 33, which is swingably supported by a support pin 32, is pivotally attached to the lower side of the piston rod 25. It is oscillated by the movement of the piston rod 34 back and forth. The inner boom 30 also has a piston rod 36 distal end of a fourth fluid pressure cylinder 35 pivotably attached in the outer boom 29 to a part of the inner boom 30. The piston rod 36 extends and retracts relative to the outer boom 29 as the piston rod 36 moves forward and backward, and a bifurcated support protrusion 37 is provided at the tip of the inner boom 30 in a slightly bent shape as shown in the figure. A shaft 38 is rotatably supported, and brackets 39 and 40 are provided at both ends of the shaft 38 to protrude from the support protrusion 37 to both sides.
A pair of arms 41 are integrally protruded from an intermediate portion of the shaft 38 which is supported by the support protrusion 37 . Bracket 39 on one side of shaft 38
A cylinder bracket 42 is supported by a support pin 43 so as to be able to swing in a direction perpendicular to the axis 38, and a fifth fluid pressure cylinder 44 is attached to this cylinder bracket 42, and a plurality of guide members 45 are further attached to the cylinder bracket 42. The guide member 45 is supported so that it can move forward and backward linearly, that is, along the cylinder bracket 42 while being held between the support pieces 46, 46 of The guide member 45 is moved forward and backward relative to the cylinder bracket 42 by the movement of the piston rod 47 back and forth as fluid is supplied and discharged from the cylinder 44.
A sixth hydraulic cylinder 48 is swingably supported substantially at the tip of the inner boom 30, and the tip of a piston rod 49 is pivotally connected to the arm 41 of the shaft 38 by a support pin 50. The cylinder bracket 42 together with the guide member 45 is rotated about its axis 38 with respect to the inner boom 30 by the movement of the piston rod 49 back and forth as fluid is supplied and discharged from the fluid pressure cylinder 48 of No. 6. A seventh fluid pressure cylinder 51 is swingably supported on the other bracket 40 of the shaft 38, and its piston rod 52 faces obliquely toward the cylinder bracket 42 and is supported at the end of the cylinder bracket 42. The piston rod 52 is pivotally connected by a pin 53, and the cylinder bracket 42 swings together with the guide member 45 in a direction perpendicular to the rotational direction as the piston rod 52 moves forward and backward as fluid is supplied and discharged from the cylinder 51. be done.

A spray nozzle 54 is provided at the tip of the guide member 45.
is removably fixed via a mounting member 56,
The spray nozzle 54 is connected to air and mortar supply sources (not shown), respectively, via an air hose 56 and a mortar supply member (not shown).

In addition, in the figure, 57 is a hydraulic unit attached to the support frame 12, 58 is also a staircase, 59 is a tesli provided on the swing arm 17, and 60 is also arranged between the support frame 12 and the deck 18 for high-altitude operation. 61 indicates a hydraulic operating unit attached to the deck 18 for high-altitude operation.

Further, the first to seventh fluid pressure cylinders 6, 1
9, 33, 35, 44, 48, 51 and two hydraulic motors 62, 62, as shown in FIG. The manual switching valves 64a to 64h are attached to the hydraulic operation unit 61.

This embodiment is constructed as described above, and its operation will be explained.

First, to explain the forward and backward movement of the support frame 12, when the manual switching valve 64a in the first fluid pressure cylinder 6 is operated to supply fluid, the cylinder 6 itself moves against the piston rod 7 as shown in FIGS. 1 and 3. Because it moves forward to the left (forward),
The support frame 12 is guided along the guide rails 4, 4 of the frame body 3 via the guide pulleys 10 to 10 and the connecting cables 11, 11, and moves at a movement amount approximately twice that of the cylinder 6. (advance in the same direction), and by supplying fluid to the first fluid pressure cylinder 6 in the opposite direction to the aforementioned direction by switching the manual switching valve 64a, the support frame 12 is moved in the aforementioned opposite direction. Moved (backward).

Next, to explain the vertical movement of the deck 18 for high-altitude operation, the two second fluid pressure cylinders 1
When fluid is supplied into the cylinders 19, 19 by operating the common manual switching valve 64b in the cylinders 9, 19, the respective piston rods 20,
20 are moved simultaneously, and the pair of swinging arms 17, 1
7 is swung upward while maintaining the parallel state, the deck 18 for high-altitude operation is attached to the support frame 12.
It is lifted up while maintaining a horizontal state against the ground, and is capable of high-altitude operation by supplying fluid to the second fluid pressure cylinders 19, 19 in the opposite direction to the above-mentioned direction by switching the manual switching valve 64b. The deck 18 is lowered while remaining horizontal (see Figure 1).

Next, the rotation and swinging of the boom 28 and the expansion and contraction of the inner boom 30 will be explained.
When the hydraulic motors 62, 62 are operated to supply fluid to the hydraulic motors 62, 62, both the hydraulic motors 62, 62 are driven and the worms 27, 27 are rotated. The support shaft 22 is slowly rotated, and along with this, the eccentric mounting plate 23 and the bracket 2
5, the entire boom 28 is rotated around the support shaft 22, and the hydraulic motors 62, 62 are rotated by supplying fluid in the opposite direction to the above-mentioned direction by switching the manual switching valve 64c. Since 62 and 62 are driven in the opposite direction to the above,
Boom 28 is rotated in the opposite direction. In addition,
When the boom 28 rotates, it rotates together with the balance weight 24, that is, rotates around the support shaft 22, thereby smoothing the rotation of the boom 28. Then, when the manual switching valve 64d in the third fluid pressure cylinder 33 is operated to supply fluid to the cylinder 33, the piston rod 34 advances, so that the entire boom 28 is supported by the support pin 31 with respect to the bracket 25. By supplying fluid in the opposite direction to the above-mentioned direction to the third fluid pressure cylinder 33 by switching the manual switching valve 64d, the entire boom 28 is swung in the opposite direction to the above-mentioned direction. It is swung back (see Figure 5). In addition, by switching the manual switching valve 64e in the fourth fluid pressure cylinder 35 in the forward or reverse direction, the direction of fluid supply to the cylinder 35 is controlled, and the piston rod 36 advances or retreats, so that the inner boom 30 is extended and retracted relative to the outer boom 29 (see FIG. 5).

Next, the guide member 45 for the inner boom 30
To explain the rotation and swing of the sixth fluid pressure cylinder 48, by operating the manual switching valve 64g in the sixth fluid pressure cylinder 48 in the forward or reverse direction, the direction of fluid supply to the cylinder 48 is controlled and the piston rod 49 is controlled. When the arm 41 moves forward and backward, the shaft 38 is reciprocated together with the arm 41, so that the guide member 45 along with the cylinder bracket 42 is reciprocated about the shaft 38 (see FIGS. 5 and 6). In addition, the seventh fluid pressure cylinder 51
When the manual switching valve 64h is operated in the forward or reverse direction to control the direction of fluid supply to the cylinder 51 and move the piston rod 52 forward or backward, one end of the cylinder bracket 42 is pulled or pulled. As a result, the cylinder bracket 42 is swung along with the guide member 45 about the support pin 43 relative to the shaft 38 in a direction (left and right) perpendicular to the aforementioned rotational direction (see FIG. 6). Then, by switching the manual switching valve 64f in the fifth fluid pressure cylinder 44 in the forward or reverse direction, the direction of fluid supply to the cylinder 44 is controlled and the piston rod 47 is moved forward or backward. The guide member 45 moves the spray nozzle 5 while being guided by the support piece 46 with respect to the cylinder bracket 42.
4 and move forward and backward in a straight line.

Now, in this example, each operation is performed as described above to perform mortar spraying work. To explain the procedure, in a tunnel excavated to a predetermined size, the wall surface H of the tunnel is The truck-type vehicle 1 of this embodiment is placed near the area in order to spray mortar onto the area. After that, the spray nozzle 5 is applied to the wall surface H of the tunnel.
4 facing each other. That is, as described above, the support frame 12 is positioned at the front end (the left end in FIG. 1) of the deck 2 of the vehicle 1, and the boom 28 is mounted on the eccentric mounting plate 23 in front of the deck 18 for high-altitude driving. The support shaft 22 rotatably supported through the tunnel is raised to approximately the center position of the tunnel. Then, the spray nozzle 54 of the guide member 45 is turned upward by the rotation of the boom 28 itself and the operation of the sixth fluid pressure cylinder 48, and the guide member 45 is moved together with the spray nozzle 54 into the seventh fluid. By operating the pressure cylinder 51, the boom 28 is made perpendicular to the wall surface H of the tunnel, and the boom 28 itself is swung, the inner boom 30 is extended, and the guide member 45 is moved back and forth with respect to the cylinder bracket 42. By combining these operations, the distance between the tip of the spray nozzle 54 of the guide member 45 and the wall surface H of the tunnel is set as desired. Therefore, air and mortar are supplied to the spray nozzle 54 and the mortar is sprayed from the spray nozzle 54 onto the tunnel wall surface H. During this spraying work, the boom 28 itself reciprocates, the boom 28 is guided The guide member 45 is moved by the swinging of the member 45 and further by the backward movement of the support frame 12 with respect to the frame body 3.
At the same time, the spray nozzle 54 is sequentially applied to the tunnel wall H.
The spraying work is carried out in a predetermined range by moving the sprayer along the In particular, the support shaft 22, which is the center of rotation of the boom 28, can be set approximately at the center of the tunnel, and by setting the elevation angle of the boom 28 to an angle corresponding to the wall surface H of the tunnel, nozzle 54 can be supported. The turning radius from the center extension line of the shaft 22 to the nozzle 54, that is, the wall surface H
Since the boom 28 can rotate around the support shaft 22, the nozzle 54 can work along the wall surface H extremely efficiently. Thereafter, the vehicle 1 is moved again and the mortar is sprayed in a predetermined range as described above, and the above-described operations are then sequentially repeated to complete the spraying of mortar onto the entire tunnel wall surface H. .

It should be noted that the operations of the above-mentioned members are performed by an operator using the hydraulic operation unit 61 while riding on the deck 18 for high-altitude operation, and remote control is possible. It goes without saying that this method can be applied to tunnels in the form of upper half advanced excavation, full section excavation, etc., and for example, even if crushed stones, etc. remain in a sloping manner on the floor of the tunnel, the position of the nozzle 54 can be adjusted. Since the boom 28 has a longer horizontal distance to the center of rotation, that is, a foot portion, by rotating the boom 28 around the support shaft 22, spraying work on the wall surface H can be performed efficiently without any hindrance.

Further, although this embodiment has been described for the case of mortar spraying work, it can also be easily applied to cleaning work such as washing with water, and in this case, the nozzle 54
What is supplied to the cleaning device is water or a cleaning liquid, and a cleaning brush is separately attached, and this cleaning brush is preferably of a rotating type.

As described above, the present invention includes a support frame 1 mounted on a deck 2 of a working vehicle 1 so as to be movable back and forth.
2, a deck 18 for high-altitude operation that is installed on the tip side of a swinging arm 17 that constitutes a parallel link mechanism with respect to the support frame 12 and is always held horizontally and moved up and down; The vehicle 1 is rotatably supported at the front by a support member 21 of the same deck.
A boom 28 is attached to an eccentric mounting plate 23 that is attached to a support shaft 22 projecting from the rear and is always rotated in a vertical direction, and is extendable and retractable, and is attached so that it can be raised and raised. A bracket 39 provided on a shaft 38 rotatably attached to the distal end side is pivotally connected via a support pin 43, and is rotated about the shaft 38, and the shaft 38 is rotated about the support pin 43. A cylinder bracket 42 that swings in a direction perpendicular to the surroundings, and a nozzle 54 at the tip that can move forward and backward along the cylinder bracket 42.
a guide member 45 having a
8, it is possible to provide a radius of turning operation from the extension line of the support shaft 22 to the nozzle 54. Therefore, in particular, by setting the support shaft, which is the center of rotation of the boom, at almost the center of the tunnel, and by setting the boom's elevation angle to an angle corresponding to the tunnel wall surface H, the nozzle has no support. Since the radius of turning work from the center extension of the shaft to the nozzle, that is, the radius corresponding to the wall surface H, can be obtained, the nozzle can work extremely efficiently along the wall surface H by turning the boom around the support shaft. I can do it. It goes without saying that this method can be applied to Nozzle-like tunnels during upper-half advanced excavation and full-section excavation. Since the boom has a horizontal distance to the center of rotation, that is, a foot portion, spraying work on the wall surface H can be performed efficiently without any hindrance by rotating the boom around the support shaft. In addition, by moving the support frame relative to the deck as the boom radius is set, it is possible to further expand the fixed position work, making concrete spraying and cleaning work in tunnel construction extremely labor-saving. can. In addition, by the movement of the guide member and boom that support the tool, it is possible to work in an optimal state corresponding to the work area, and the movement of the tool during the work is also controlled by the guide member and boom. It can be done smoothly. Moreover, since the workers work on the deck for high-altitude operation, the safety of the workers can be ensured. In particular, when spraying concrete such as mortar on tunnel walls, the worker will not be exposed to concrete splashing, and the risk of personal injury due to falling concrete at the sprayed area will be reduced, and the work will be guided. Concrete can be sequentially sprayed onto the tunnel wall by the movement of the members and boom, which has the advantage of reducing the number of workers, significantly reducing fatigue, and enabling efficient work.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, in which Fig. 1 is a side view showing the whole, Fig. 2 is a front view, Fig. 3 is a plan view showing the relationship between the frame body and the support frame, and Fig. 4 is a third
5 is a perspective view showing a deck for high-altitude operation, FIG. 6 is a partially cutaway front view showing the relationship between the deck, boom, and guide member, and FIG. 7 is a sectional view taken along line A-A in the figure. It is a hydraulic circuit diagram. 1: Vehicle, 2: Deck, 12: Support frame,
17: Swing arm, 18: Deck for high-altitude operation,
28: Boom, 45: Guide member, 54: Spray nozzle, 22: Support shaft, 23: Eccentric mounting plate.

Claims (1)

[Claims] 1 A support frame 12 mounted on the deck 2 of the work vehicle 1 so as to be movable back and forth, and a swing arm 17 that is installed at the tip side of a swing arm 17 that constitutes a parallel link mechanism with respect to the support frame 12 so as to be always horizontal. A deck 18 for high-altitude driving is held and moved up and down, and the deck 18 is rotatably supported by a support member 21 of the deck on the front surface thereof, and is attached to a support shaft 22 protruding from the rear of the vehicle 1. A boom 28 is attached to the eccentric mounting plate 23, which is always positioned and rotated in the vertical direction, and is extendable and retractable, and is mounted so that it can be raised and raised.
The bracket 39 provided on a shaft 38 rotatably attached to the distal end side of the shaft 8 is pivoted via a support pin 43, and is rotated around the shaft 38. A cylinder bracket 42 swings in a direction perpendicular to the axis 38.
A guide member 4 having a nozzle 54 at its tip can move forward and backward along the cylinder bracket 42.
5, and is configured to provide a turning work radius extending from the extension line of the support shaft 22 to the nozzle 54 by raising and lowering the boom 28.