JPS6231510Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a positioning device for a cart of a rock drilling machine used for tunnel excavation, and more particularly to a positioning device for determining the lateral position of the cart.

(Prior art) Rock drilling equipment for tunnel excavation, in which a rock drill for drilling a charge hole for blasting explosives is mounted on a trolley running on wheels or tracks, has been widely put into practical use. . Recently, this type of rock drilling equipment has been developed in which a boom supporting the rock drill moves according to a memorized predetermined drilling pattern, and the rock drill is automatically set at a predetermined position on each face. It has become common to drill holes as
When using a rock drilling machine that automatically drills holes in this way, the cart loaded with the rock drilling machine must be
It is necessary to set it accurately at the specified position on each face.

Recently, as a method of setting the rock drill truck at the specified position as described above, a laser beam that travels parallel to the tunnel axis is emitted at a predetermined position on the tunnel cross section, and the laser beam is placed in front and behind the rock drill truck. A method is used in which the targets are fixed one by one and the cart is moved vertically and horizontally so that both targets are accurately irradiated with the laser beam.
When carrying out such a cart positioning method, the cart is brought close to a specified position and stopped, but it is usually impossible to accurately set the cart at the specified position. Therefore, the trolley has outriggers (for example,
(Refer to Japanese Utility Model Application Publication No. 57-56884), the outrigger lifts the truck off the ground and finely moves the truck in vertical and horizontal directions so that the two targets are irradiated with a laser beam.

To determine the vertical position of the cart floating above the ground, it is sufficient to adjust the amount of vertical movement of the outriggers, but in order to move the cart laterally on the outriggers, a separate positioning device is required.
Conventionally, as a positioning device for moving a truck laterally on an outrigger, an outrigger connection frame, which is provided with outriggers at both ends and extends in the left-right direction of the truck, is arranged between guide plates extending from the front and rear of the truck. The outrigger connection frame and the truck are connected to each other so that they can move laterally and swing in a substantially horizontal plane, and lateral movement cylinders, one end of which is supported by the outrigger and the other end connected to the truck, are connected to the front and rear outrigger connection frames, respectively. A device is known in which a pair of devices are arranged along each other. In this device, the outriggers are grounded to lift the truck off the ground, and the lateral movement cylinders are activated to move the truck laterally.Moreover, by making a difference in the amount of movement of these cylinders, the truck can be moved in a substantially horizontal plane. Since it swings so as to be tilted in the left-right direction with respect to the tunnel axis, it is possible to perform lateral positioning of the truck, including correction of inclination.

However, the conventional truck positioning device having the above-mentioned structure uses a slide that is slidable along the outrigger connecting frame in order to allow the outrigger connecting frame and the truck to move laterally relative to each other and swing in a substantially horizontal plane. The other end of the lateral movement cylinder was supported by a member, and the slide member and the carriage were connected via pins arranged almost vertically, making the structure of this connection complicated. . Furthermore, since the lateral movement cylinder is installed outside the frame along with the outrigger connection frame, there is a risk that this lateral movement cylinder may be damaged by rocks, etc. when the trolley runs on extremely uneven rock. It was also expensive. Furthermore, in the conventional device, in order to automatically return the outrigger connection frame to the initial position when the outrigger is released from the ground and the truck is ready to travel, the side opposite to the pin is placed on both the left and right ends of the truck. There are two leaf springs between the guide plates that resiliently abut against the outrigger connection frame, but since these two leaf springs are attached to the guide plate with bolts, maintenance such as replacement of the leaf springs is required. The work had become extremely complicated.

(Purpose of the invention) The present invention was made in view of the above circumstances, and is to provide a lateral positioning device for a rock drilling truck that has a simple structure, easy maintenance work, and has a low risk of damage. The purpose is to provide

(Structure of the Invention) As described above, the rock drilling truck positioning device of the present invention uses a pair of lateral movement cylinders to move the truck laterally when the outrigger touches the ground, and the difference in the amount of movement of these cylinders causes the truck to be moved horizontally. In a positioning device designed to swing in a horizontal plane, a pair of lateral movement cylinders are housed inside an outrigger connection frame, one end of which is supported by the outrigger, and the other end is directly connected to a truck via a nearly vertical pin. At the same time, a swing guide member is provided on the trolley in order to support the outrigger connecting frame on the trolley, and an arcuate contact surface that allows the outrigger connecting frame to swing in a substantially horizontal plane abuts one front and rear side of the frame; A pair of pressing members are provided on both left and right end sides of the truck from the swinging guide member and are disposed so as to be movable in the front and back direction of the truck so as to abut the other surface of the frame from the side opposite to the guide member, and these pressing members are each biased toward the frame by coil springs supported by the truck.

(Embodiments) Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

1 and 2 are a plan view and an elevation view showing the front part of a rock drill truck positioning device according to an embodiment of the present invention. As an example, one or more rock drills (not shown) are loaded on a truck 2 that travels in the front-rear direction (vertical direction in FIG. 1) on an endless track 1. Two upper and lower guide plates 2a and 2b extending substantially horizontally are provided at the front of the truck 2, and an outrigger connection frame 3 extending in the left-right direction of the truck is disposed between these guide plates 2a and 2b. . Lower surface of guide plate 2a, guide plate 2b
A sliding surface on which a lubricant such as grease is applied is formed on the upper surface of the outrigger connecting frame 3, and the outrigger connection frame 3 is in contact with the sliding surface.
It is possible to smoothly slide in a substantially horizontal plane with respect to b.

On the rear side of the outrigger connection frame 3, one swing guide member 4 facing toward the front of the truck is fixed to the widthwise central portion of the truck 2.
Further, on the front side of the outrigger connection frame 3, the bogie 2 is supported by a pair of pressing members 5 and 6, which are located away from the center in the width direction of the bogie 2 toward the left and right ends of the bogie, and each face toward the rear of the bogie. has been done.

FIG. 3 shows the swinging guide member 4 and one pressing member 5.
FIG. 2 is a cross-sectional view taken along the line -- in FIG. 1, showing the details. As shown in FIG. 3, the swing guide member 4 is disposed between the guide plates 2a and 2b of the truck 2, and its front end has a horizontal cross-sectional shape of an arc, as shown in FIG. The contact surface 4a has a circular arc shape. A grease supply hole 4b that penetrates the inside of the guide member 4 in the front-rear direction is opened in this arcuate contact surface 4a, and a grease nipple is connected to the rear end side of the grease supply hole 4b through, for example, a grease pipe. It is connected to grease supply means such as. The pressing member 5 also includes a holder 7 fixed to the trolley 2.
One end (the front end of the truck) is biased toward the rear, that is, toward the outrigger connection frame 3 by a coil spring 9 that abuts against the holder lid 8 . A grease supply hole 5a is opened at the tip of the pressing member 5,
This grease supply hole 5a protrudes from the holder lid 8 and has a grease nipple (not shown) at its tip.
It communicates with the pipe member 10 to which the pipe member 10 is attached. Although not shown in FIG. 3, the other pressing member 6 is also formed in the same manner as the pressing member 5 described above.

Therefore, the two pressing members 5 and 6 push the outrigger connection frame 3 rearward, and the frame 3
The rear surface 3a of the swing guide member 4 is elastically pressed against the arcuate contact surface 4a of the swing guide member 4. Therefore, the outrigger connection frame 3 is resiliently supported at three points by the swinging guide member 4 and the pair of pressing members 5, 6, and slides on the swinging guide member 4 and the pair of pressing members 5, 6. It is movable in the lateral direction (in the direction of arrow A in FIG. 1). At the same time, the frame 3 has a rear surface 3a that is connected to the arcuate contact surface 4.
a, and can swing in the direction of arrow B in FIG. 1 with respect to the trolley 2 within a substantially horizontal plane while pushing one of the pressing members 5 and 6 forward against the biasing force of the coil spring. .

Outriggers 12 are attached to both left and right ends of the outrigger connection frame 3, respectively. This outrigger 12 has been conventionally used to raise and fix various types of vehicles above the ground, and includes an outer case 13 fixed to the frame 3, and an inner inner case that is vertically slidable within the outer case 13. It consists of a case 14 and a cylinder 15 whose upper end is supported by the outer case 13 and whose lower piston rod is connected to the inner case 14.

The outrigger connection frame 3 is formed into a hollow rectangular tube shape, and a lateral movement cylinder 16 is housed inside thereof. This lateral movement cylinder 16 is disposed close to one of the outriggers 12, and its cylinder end is rotatably supported by the outer case 13 of the outrigger 12 via a substantially vertically disposed pin 17. A ring 18 is fixed to the tip of the piston rod 16a of the cylinder 16 facing toward the center of the truck.
A pin 19 protrudes into the frame 3 through a long hole 3b formed in the lower surface of the outrigger connection frame 3, which is fixed upright to the lower guide plate 2b, and is rotatably engaged.

Although not shown in the figure, outriggers are supported at both left and right ends in the same manner as the outrigger connection frame 3 explained above at the rear of the truck 2, and three elastic points are supported by a swing guide member and a pair of pressing members. An outrigger connection frame is provided which is supported and has a lateral displacement cylinder therein.

The operation of the apparatus of this embodiment having the above structure will be explained below. As shown in FIG. 1, a target 2 is fixed at a predetermined position at the front of the truck 2, and another target (not shown) is fixed at the rear of the truck 2 at a distance from this target 20. Ru.
A laser light source that emits a laser beam L toward the face side is installed in the tunnel being excavated, and the laser light source is set so that the laser beam L advances at a predetermined position on the tunnel cross section. Therefore, if the bogie 2 is set so that the laser beam L irradiates the above pair of targets, it can always take a prescribed position with respect to the tunnel cross section, and the rock drill to be loaded can be set at a predetermined position on the face. As described above, automatic drilling is possible with the drilling machine.

Therefore, when drilling a new face, the trolley 2 first drives the endless track 1 and advances to a position where both targets are irradiated with the laser beam L, but of course, normally it is not necessary to precisely reach such a prescribed position. It cannot be stopped. After approaching the specified position and stopping the truck 2, the cylinder 15 of the outrigger 12 is activated, its piston rod is extended, and the inner case 14 is lowered. The inner case 14 extends further below the lower surface of the endless track 1, and the truck 2 is lifted off the ground by four outriggers 12. Inner case 14 of this outrigger 12
By adjusting the length of the downward protrusion, the vertical position of the trolley 2 can be controlled.

After the truck 2 is lifted off the ground, if the lateral movement cylinder 16 is activated to move the piston rod 16a in the left and right direction, the truck 2 moves along the outrigger connection frame 3, and the lateral position of the truck 2 can be controlled. . At this time, if the piston movement amount of the illustrated lateral movement cylinder 16 and the lateral movement cylinder at the rear of the truck (not shown) are made the same,
The truck 2 moves straight laterally (in the direction of arrow A in Figure 1), and if a difference is given to the amount of piston movement in both cylinders, the truck 2 swings to the left and right in a substantially horizontal plane, so the pistons in both cylinders By controlling the respective amounts of movement, it is possible to position the truck 2 in the lateral direction so that the laser beam L irradiates the front and rear two targets.

As mentioned above, the outrigger connection frame 3 is swingable relative to the truck 2 in the direction of arrow B in FIG.
6a and the truck 2 are connected by the ring 18 and the pin 19, so that the truck 2 can swing in a substantially horizontal plane as described above. Further, grease is supplied to the sliding surfaces of the swing guide member 4, the pressing members 5, 6, and the outrigger connection frame 3 through the aforementioned grease supply holes 4b, 5a, and the lateral movement of the truck 2 is performed smoothly.

As explained above, the cart 2 is set at a specified position by the four outriggers 12, and after drilling holes in the face in a specified pattern with a rock drill, the inner case 14 of the outrigger 12 is raised. When the endless track 1 is lowered to the ground and the lateral movement cylinder 16 is returned to its initial state, the outrigger connection frame 3, which had been tilted in the direction of arrow B in FIG. Then, it is elastically pressed and returns to the initial position where it extends straight in the left-right direction of the trolley.

(Effects of the Invention) As explained above, in the rock drill truck positioning device of the present invention, the outrigger connecting frame is elastically moved to three points by the swinging guide member and the pair of biased pressing members. Since the outrigger is supported, the structure is much simpler and costs can be reduced compared to a device in which a slide member that slides on the outrigger connection frame is provided and the slide member is connected to the truck. Furthermore, since the pressing member is biased by a coil spring, the coil spring can be installed and removed from the outside of the truck, making maintenance work for the spring easy. Furthermore, in the present device, since the lateral movement cylinder is housed within the outrigger connection frame, the lateral movement cylinder is not damaged by rock or the like.

[Brief explanation of the drawing]

FIG. 1 is a partial plan view showing one embodiment of the present invention;
FIG. 2 is a partially cutaway elevational view of the above embodiment, and FIG. 3 is a sectional view taken along the line -- in FIG. 2... Dolly, 2a, 2b... Guide plate, 3... Outrigger connection frame, 3a... Rear surface of outrigger connection frame, 4... Swinging guide member, 4a... Arc-shaped contact surface, 5, 6... Pressing member, 7, 11 ... Holder, 9 ... Coil spring, 12 ... Outrigger, 16 ... Lateral movement cylinder, 16a ... Piston rod, 18 ... Ring, 19 ... Pin.

Claims (1)

[Scope of utility model registration request] An outrigger connection frame, which has outriggers at both ends and extends in the left-right direction, is supported at the front and rear of the rock drill truck so that it can move laterally with respect to the truck and swing in a substantially horizontal plane. A pair of front and rear lateral movement cylinders, one end of which is supported by the outrigger and the other end connected to the truck, move the truck laterally when the outrigger touches the ground, and also swing the truck by the difference in the amount of movement of these cylinders. In the rock drilling truck positioning device, the pair of lateral movement cylinders are each housed inside an outrigger connection frame, and the other end is pin-coupled to the truck via a substantially vertical pin. , a swinging guide member whose arcuate contact surface that allows the swinging of the outrigger connection frame contacts one front and rear side surface of the frame; A pair of pressing members supported so as to be movable in the longitudinal direction of the truck so as to come into contact with the other surface of the frame from the opposite side, and a coil spring each urging these pressing members toward the frame are provided. Positioning device for rock drill truck.