JPS6241113Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a rock drilling device.

Rock drilling equipment, especially rock drilling equipment used for drilling vertical or nearly diagonal holes such as the bench cut method in mining or civil engineering work, has recently tended to become larger and larger.
Along with this, there is a need for sophisticated equipment that can handle tasks associated with drilling by remote control. One such example is a joint rod changer used for drilling long holes.

Prior to this application, the present applicant had proposed a rod storage and attachment/detachment device to be installed in a rock drilling device as shown in Utility Model Publication No. 53-49764. The rod storage and attachment/detachment device installed in this rock drilling device has a support arm with a notch in the center for storing the rods in parallel, which is attached to two brackets at the top and bottom of a guide cell established on the ground. a rod alignment plate which is attached to rotate concentrically with each other and has a radial convex portion formed at the free end of each support arm to cooperate with the end of the notch to sandwich the rod;
A clamp lever having a stopper piece is rotatably provided, and a support piece for supporting the lower end of the front row rod stored in this notch is placed below a notch cut into the end of the lower support arm. Rotatably installed,
The bracket and the arm, the arm and the clamp lever, and the arm and the branch piece are rotated relative to each other by a drive motor such as a hydraulic cylinder supported by the bracket and arm. That is.

The rod storage and attachment/detachment device described in Utility Model Publication No. 53-49764 has the above structure and can smoothly and accurately guide and send out the held rod when drilling a vertical or nearly vertical hole. The shaft 13 is aligned with the axis of the rock drilling machine's shaft, which simplifies the feed operation of the rock drilling machine, and allows the rod to be attached and detached in a short time and reliably, improving the drilling efficiency of the rock drilling machine. This can be significantly improved.

However, this rod storage and attachment/detachment device uses a clamp lever that has a stopper piece on the outside of the support arm in order to prevent the rod from moving in the axial direction when storing and holding the rod and guiding it out. This has the disadvantage that the configuration of the drive system etc. for that purpose becomes complicated.

SUMMARY OF THE INVENTION An object of the present invention is to provide a rod changer for rock drilling equipment that has a simple structure and can accurately and reliably hold the rod without moving in the axial direction.

The present invention is a rock drilling rod changer which holds a plurality of rods which are arranged in a guide cell and have a constricted portion in part, and which sequentially connects the plurality of rods to the rock drilling machine. a pair of arms swingably supported on one side of the guide cell in substantially alignment with each other around an axis parallel to the axis; an actuator for driving the pair of arms;
It consists of a substantially fan-shaped rod holding plate supported by each of the arms so as to be swingable about an axis parallel to the guide cell, and an actuator for swinging the rod holding plate, and the outer circumferential portion of the rod holding plate is a plurality of substantially L-shaped notches are formed at intervals from each other for supporting the plurality of rods, and the rod retaining plate has a plurality of notches extending radially outwardly therein; A presser spring that biases the rod to the inner part of the notch is provided in each notch, and the outer end of this presser spring is bent in the opposite direction to the biasing direction. The rod constitutes a receiving guide part that guides the rod into the notch, and the deep part of the notch of at least one of the pair of rod holding plates matches the diameter of the constricted part of the rod. The rod has an arcuate radius, and the rod is held while being prevented from moving in the axial direction by the presser spring and the inner part of the notch of the rod holding plate. It is something.

As explained above, according to the present invention, a plurality of approximately L-shaped notches are formed in the rod holding plate, focusing on the fact that a constricted part, that is, a reduced diameter part, is inevitably formed in a part of the rod. , the inner part thereof forms an arc shape with a diameter corresponding to the diameter of the constriction of the rod, and the above-mentioned presser springs are provided close to each notch, and the rod is held in the notch by this spring. The rod is guided and held at its constriction by the spring and the inner part of the notch, so that the rod can be accurately and reliably held without moving in the axial direction with a simple structure. Can be done.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a rod changer for a rock drilling device according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

1 and 2 are a front view and a side view, respectively, showing a rock drilling device incorporating the rod changer of the present invention.

In the figure, reference numeral 1 indicates a guide cell, and a rock drill 2 is mounted above the guide cell, which is moved over the guide cell 1 by a feed motor (not shown). A centralizer 3 is attached to the tip of this guide cell 1.
Using this centralizer 3, a sleeve (not shown) is attached to the shank rod (not shown) of the rock drill 2.
A rod R as shown in FIG. 3 is connected via. As shown in FIG. 3, this rod R is provided with threaded portions T at both ends thereof, and has a reduced diameter portion, that is, a constricted portion S adjacent to the threaded portion T for the purpose of explanation later. It is formed. Note that the centralizer 3 may have the same structure as a known centralizer, so further explanation will be omitted.

A rod changer 4 is disposed on the guide cell 1 between the rock drill 2 and the centralizer 3 at the position shown in the figure. This rod changer 4 has a guide cell 1 in the vicinity of the rock drill 2.
A first part 7a is pivotally connected by a shaft 6 to a bracket 5 attached to the guide cell 1, and a second part is pivotally connected by a shaft 9 to a bracket 8 attached to the guide cell 1 in the vicinity of the centralizer 3. It starts from 7b. The first part 7a and the second part 7b of this rod changer 4 have almost the same structure,
They are arranged in alignment with each other on one side of the guide cell 1.

The first part 7a of the rod changer 4 has an arm 10a pivotally connected to the bracket 5 by a shaft 6 as shown in FIG. 8, each having an arm 10b pivotally connected to the arm 10b. Arm 10
On the backs of arms a and 10b, guide members 11a and 11b are connected to shafts 6 and 9, respectively, in the same way as these arms.
It is pivotally connected to brackets 5 and 8 by. The shafts 6 and 9 are arranged coaxially, and the arms 10a and 10b and the guide members 11a and 11b are
These arms 10a, 10b and the guide member 11 are connected by a book rod 12.
a and 11b can be rotated simultaneously about shafts 6 and 9. These arms 10a, 1
0b and the guide members 11a, 11b are rotated by a cylinder device 14, which is attached at one end to the rod 12 and at the other end to a rod 13 arranged parallel to the guide cell 1.

Between arm 10a and guide member 11a, arm 1
Rod holding plates 15a and 15b are arranged between the guide member 11b and the guide member 11b, respectively. These rod holding plates 15a, 15b are approximately fan-shaped, and are each pivotally connected to the shaft 12 at their bases, and have approximately L-shaped notches 1 at their outer peripheries.
A plurality of 6a and 16b are formed. These notches 16a, 16b are for accommodating and holding the rod R, and the deep parts 17a, 17b are the constricted parts S of this rod R, as shown in FIG.
It has an arc shape with a diameter corresponding to the diameter of. The rod holding plates 15a, 15b have extensions 18a, 1 extending in a direction opposite to the main body side with respect to the shaft 12.
8b. Rod holding plates 15a, 15b
Cylinder devices 19, 20 are provided in order to rotate only the shaft 12 about the shaft 12. The cylinder device 19 has one end attached to the free end of the extension 18a of the rod holding plate 15a, and the other end attached to a bracket 21 fixed to the shaft 6.
The cylinder device 20 has one end connected to the rod holding plate 1.
The free ends of the extensions 18b of 5b are respectively attached to brackets 22 whose other ends are fixed to the shaft 9.

Each rod holding plate 15a, 15b has a notch 1.
6a, 16b, a rod pushing spring 23 that pushes the rod R toward the inner part 17a, 17b of the notch.
a, 23b are provided. The rod pushing springs 23a, 23b extend radially outward of the rod retaining plates 15a, 15b, as shown in FIGS. It is bent in the opposite direction to the inner parts 17a and 17b, and forms a guide receiving part for guiding the rod R into the notch.

The arms 10a and 10b arranged on one side of the rod holding plates 15a and 15b have notches 25a and 25b (notches 16a and 16b) so that the rod R can be received in the notches 16a and 16b of the rod holding plates. 25b (not shown) is formed. On the other hand, the guide members 11a and 11b arranged on the other side of the rod holding plates 15a and 15b have notches 16a and 16b in which the rod holding plates 15a and 15b are arranged to hold the rods in the rod R.
When the rod R is held and rotated around the shaft 12, guide grooves 26a and 2 are provided to guide the rod R for safety.
6b (note that the guide groove 26a is not shown)
is formed. Note that this guide member 11a,
11b is used only for the purpose of ensuring safety, and therefore is not necessarily necessary.

Hereinafter, the operation of the rod changer 4 having the above structure will be explained with reference to FIGS. 6 to 9. Since the functions of the first part 7a and the second part 7b of the rod changer 4 are the same, only the first part 7a will be explained, and the explanation of the second part 7b will be omitted.

First, FIG. 6 shows a state in which the rods R1 and R2 are housed and held by the first piece 7a of the rod changer 4. In this state, rods R1 and R2 are
As can be seen in FIG. 10, the inner part 17a of the notch 16a of the rod holding plate 15a is
Since it is held by the action of the spring 23,
It cannot be moved in the axial direction. From this state, the cylinder device 14 is operated to rotate the entire first portion 7a of the rod changer 4 clockwise in the figure around the shaft 6, and as shown by the chain line, the center of the rod R1 is drilled. center C. Next, as shown in FIG. 7, after connecting the first rod R1 to the rock drill 2, the cylinder device 19 is extended, and only the rod holding plate 15a is rotated clockwise in the figure around the shaft 12. , the rod R1 connected to the rock drill 2 is inserted into the inner part 1 of the notch 16a as shown in the figure.
Escape from 7a.

Next, the cylinder device 14 is inserted into the first portion 7a.
After bringing the whole thing to the position indicated by the chain line in Figure 7,
The cylinder device 19 is contracted and the rod holding plate 15 is
Only part a is rotated counterclockwise to the position shown by the solid line in FIG. After that, the tip of the rod R1 connected to the rock drill 2 is connected to a rod with a drilling bit (not shown) that is cut out in the hole at the front using a centralizer 3, etc., and in this state. Perform drilling.

After connecting the first rod R1 and drilling a hole, in order to connect the second rod R2 to the rock drilling machine 2, the cylinder device 14 is connected again and the first portion 7a is connected.
The whole is brought to the position shown by the chain line in FIG. 8, the center of the second rod R2 is aligned with the center C of the shank rod of the rock drill 2, and the rod R2 is connected to the rock drill 2. After this, as in the case of the first rod R1, the rod holding plate 15a is rotated clockwise as shown by the chain line in FIG. 9 to release the rod R2, and then the entire first portion 7a is Rotate counterclockwise to the position shown by the solid line in Figure 9. Finally, the tip of this rod R2 is connected to the rod R1, and a hole is drilled in this state.

The rods R2 and R1 can be recovered by reversing the connection process described above with reference to FIGS. 6 to 9.

[Brief explanation of the drawing]

Fig. 1 is a front view showing a rock drilling device incorporating the rod changer of the present invention;
Figure 3 is a side view of the rock drilling equipment shown in the figure, Figure 3 is a side view of the rod used in the rock drilling equipment shown in Figures 1 and 2, and Figure 4 is a cross section taken along the line - in Figure 2. 5 is a sectional view taken along the line - of FIG. 2, and FIGS. 6, 7, 8, and 9 are
FIG. 10 is an explanatory schematic diagram illustrating the process of connecting rods using the rod changer of the present invention, and FIG. 10 is an enlarged view of the main part of the rod held on a rod holding plate. DESCRIPTION OF SYMBOLS 1... Guide cell, 2... Rock drill, 4... Rod chain gear, 7a... First part, 7b... Second part, 10a, 10b... Arm, 14... Cylinder device, 15a, 15b... rod retaining plate,
16a, 16b...notch, 17a, 17b...
Back part, 19, 20...Cylinder device, 23a, 2
3b... Rod push spring, 24a, 24b... Outer end portion, R... Rod, S... Constricted portion.

Claims (1)

[Scope of utility model registration request] A rod changer for a rock drilling device that holds a plurality of rods arranged in a guide cell and having a constricted portion in part, and sequentially connects the plurality of rods to the rock drilling device, the rod having an axis parallel to the guide cell. a pair of arms supported substantially aligned with each other on one side of the guide cell so as to be swingable about the guide cell; an actuator that drives the pair of arms; an actuator that is swingable about an axis parallel to the guide cell; , a substantially fan-shaped rod holding plate supported by each of the arms, and an actuator for swinging the rod holding plate, and a plurality of rods for supporting the plurality of rods are provided on the outer periphery of the rod holding plate. substantially L-shaped notches are formed spaced apart from each other, and the rod retaining plate includes a rod retaining plate extending radially outward to push the rod deep into the notch. A pressure spring is provided in each cutout, and the outer end of the pressure spring is bent in a direction opposite to the biasing direction to form a receiving guide for guiding the rod into the cutout. The inner part of the notch in at least one of the pair of rod retaining plates has an arc shape with a radius matching the diameter of the constriction of the rod, and the presser spring and the rod A rod changer for rock drilling equipment, characterized in that the rod is held by the inner part of the notch of the holding plate while preventing it from moving in the axial direction.