JP2002266587A - Rock cutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rock cutter which can apply a cutting or breaking force to a location deep in a rock while keeping a wedge member thereof to a thickness that is resistant to breakage. SOLUTION: The rock cutter has the wedge member 11 and a pair of outer members 12. The wedge member 11 includes a plurality of inclined surfaces 14a, 14b which are longitudinally punctuated and taper from a rear end 11a to a front end 11b. The outer members 12 each have a plurality of inner inclined surfaces 18a, 18b which are longitudinally punctuated and conform to the respective inclined surfaces 14a, 14b of the wedge member 11. The outer members 12 separably pinch the wedge member 11 with the rear edge of the wedge member 11 protruding therefrom.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rock breaking tool for breaking rock at a mine or the like.

[0002]

2. Description of the Related Art As a conventional rock splitting device, there is a rock splitting device in which a wedge is sandwiched between a pair of outer members. When breaking a rock,
Drill a hole in the rock, insert a rock splitter into the hole, hit the rear end of the wedge with a hammer, and the outer member will open outward, breaking the rock.

[0003]

The rock breaking device is preferably longer in order to apply a breaking force to a deeper position of the rock. However, with conventional rock splitters, the wedge is thinner from the rear end to the tip, so if you make it longer,
There was a problem that the tip side became too thin and was easily broken. There is a way to increase the diameter in order to make the tip side hard to break, but this requires the diameter of the hole to be drilled in the rock, which places a burden on the work of drilling the rock .

The present invention has been made in view of such a conventional problem, and provides a rock breaking device which can apply a force for breaking a rock to a deeper position while maintaining a wedge member at a thickness which is not easily broken. It is intended to provide.

[0005]

According to a first aspect of the present invention, there is provided a rock splitting device comprising: a wedge member;
A pair of outer members, wherein the wedge member has a plurality of inclined surfaces intermittently in the length direction so as to become thinner from the rear end side to the distal end side, and each outer member has a respective inclined surface of the wedge member. A plurality of matching inner inclined surfaces are provided intermittently in the longitudinal direction, and the rear end of the wedge member is projected so as to sandwich the wedge member so as to be separable from each other.

The rock breaking device according to the first aspect of the present invention is used by inserting a tip end into a hole previously drilled in a rock. When the rear end of the wedge member protruding from the outer member is hit with a hammer or the like, the force is applied from the inclined surface of the wedge member to the inner inclined surface of the outer member. A force that opens in the lateral direction acts on the outer member due to the force applied to the inner inclined surface from the rear end side. This allows the rock to be broken. Since the wedge member has a plurality of inclined planes intermittently in the length direction, the sum of the lengths of the inclined planes is longer than in the case where the inclined plane has a continuous inclined plane under the same condition. In addition, the thickness of the tip can be further increased. For this reason, while keeping the wedge member at a thickness that is difficult to break,
The sum of the lengths of the slopes can be increased, and a force can be applied that breaks deeper into the rock. In addition, it is preferable that all the inclined surfaces have the same inclination angle with respect to the central axis. The plurality of inclined surfaces may have two steps or three or more steps.

According to a second aspect of the present invention, there is provided a rock splitting instrument according to the first aspect, further comprising a binding member.
The binding member is stretchable and expands when an external force is applied, and binds the distal ends of the outer members with a force that can be separated from each other. In the rock splitting device according to the second aspect of the present invention, since the distal end side of the outer member is bound by the binding member, the work of inserting into the hole or pulling out from the hole can be facilitated. Because the binding member can expand and contract, when the outer member opens sideways by hitting the rear end of the wedge member with a hammer or the like, the binding member extends and does not prevent the outer member from opening instantaneously, breaking the rock. Do not disturb. After the rock breaks, the binding member shrinks back to its original state and binds the outer members again. For this reason, the work of pulling out the rock splitter from the hole can be facilitated. Preferably, the binding member is made of rubber or another elastic material.

[0008] In a third aspect of the present invention, there is provided the rock splitting device according to the first or second aspect, wherein the wedge member has an edge protruding around the rear end. Since the rock splitting device according to the present invention has an edge protruding around the rear end of the wedge member, it is easy to hit the rear end of the wedge member with a hammer, and in particular, a machine such as a breaker hammer. To facilitate tapping.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, first to third embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a first embodiment of the present invention. FIG. 1 (A),
As shown in (B), the rock splitting device 10 includes a wedge member 11, a pair of outer members 12, and a binding member 13. The wedge member 11 has an elongated rod shape, and has two pairs of inclined surfaces 14a and 14 so as to become thinner from the rear end side 11a to the front end side 11b.
b intermittently in the length direction. Therefore, the thickness d of the wedge member 11 on the rear end side of the inclined surface 14a on the front end side (see FIG. 1)
(See FIG. 1D) is thicker than the thickness c (see FIG. 1C) of the wedge member 11 on the front end side of the inclined surface 14b on the rear end side.

The inclined surfaces 14a and 14b have the same inclination angle with respect to the center axis of the wedge member 11. A shoulder 15 is formed between the inclined surfaces 14a and 14b arranged in the length direction. The shoulder 15 has a rear end 11a to a front end 1a.
A reinforcing portion 16 that becomes thicker toward 1b is formed. On the side surface of the rear end side 11a of the wedge member 11, a through hole 17 for lifting is formed.

As shown in FIGS. 1C and 1D, the pair of outer members 12 are cylindrical and have two pairs of inner inclined surfaces coinciding with the inclined surfaces 14a and 14b of the wedge member 11. 18a,
18b intermittently in the length direction. Each outer member 12
Is formed by projecting a rear end side 11a of the wedge member 11 from the rear end side 12a by a length suitable for hitting with a hammer, and sandwiching the wedge member 11 so as to be separable from each other. A ring-shaped groove 19 is formed around the distal end side 12 b of the outer member 12.

The binding member 13 is fitted in the groove 19. The binding member 13 is made of rubber, is extendable and contractable, and expands when an external force is applied to bind the distal ends 12b of the outer members 12 with a force that can be separated from each other. For this reason,
When the wedge member 11 is lifted, the outer members 12 bound by the binding member 13 are lifted together.

The rock splitter 10 is used by inserting the tip end 12b into a hole H previously drilled in a rock. A plurality of holes H are formed in the rock at predetermined intervals, for example, at intervals of 20 cm, along a line to be cut. When the rear end side 11a of the wedge member 11 protruding from the outer member 12 is hit with a hammer or the like, the force is applied from the inclined surfaces 14a, 14b of the wedge member 11 to the inner inclined surfaces 18a, 18b of the outer member 12. In the outer member 12,
The force applied to the inner inclined surfaces 18a and 18b from the rear end side 11a exerts a force to open in the lateral direction. This allows the rock to be broken.

The wedge member 11 has a plurality of inclined surfaces 14a, 14
Since b has intermittently in the length direction, the inclination angle of the inclined surface is the same under the same condition, compared with the case of having a continuous inclined surface,
The sum of the lengths of the inclined surfaces can be made longer and the thickness of the tip can be made thicker. For this reason, the sum of the lengths of the inclined surfaces can be increased while maintaining the wedge member 11 at a thickness that does not easily break, and a force for breaking the rock at a deeper position can be applied.

Since the distal end side 12b of the outer member 12 is bundled by the bundling member 13 in the rock splitting device 10, the work of inserting it into the hole or pulling it out of the hole can be facilitated. Since the binding member 13 can be expanded and contracted, the wedge member 1
When the outer member 12 is opened in the lateral direction by hitting the rear end side 11a of the outer member 1 with a hammer or the like, the binding member 13 extends to
It does not prevent the 2 from opening momentarily or breaking the rock.
After the rock breaks, the binding member 13 contracts and returns to its original state, and binds the outer member 12 again. For this reason, the work of pulling out the rock breaking device 10 from the hole can be facilitated.
If a wire or the like is passed through the through-hole 17 for lifting, the rock breaking device 10 can be more easily pulled out with a crane truck or the like.

FIG. 2 shows a second embodiment of the present invention. As shown in FIG. 2, the rock breaking device 20 includes a wedge member 21, a pair of outer members 22, and a binding member 23.
The rock splitting device 20 has three pairs of inclined surfaces 24a and 2 so that the wedge member 21 becomes thinner from the rear end 21a to the front end 21b.
4b and 24c are intermittently provided in the length direction. For this reason,
The rock splitter 20 of the second embodiment is different from the rock splitter 10 of the first embodiment described above in which the slopes are two pairs.
While maintaining the wedge member 21 at a thickness that is difficult to break, the sum of the lengths of the inclined surfaces can be made longer, and a force for breaking the rock at a deeper position can be applied. Other configurations and effects of the rock breaking device 20 of the second embodiment are the same as those of the rock breaking device 10 of the first embodiment, and duplicate description will be omitted.

FIG. 3 shows a third embodiment of the present invention. As shown in FIG. 3, the rock splitting device 30 includes a wedge member 31, a pair of outer members 32, and a binding member 33.
The wedge member 31 has an edge 34 protruding around the rear end. As a result, the rear end of the wedge member 31 has a dish-shaped diameter larger than that of the front end side. For this reason, the rock splitting device 30 of the third embodiment is different from the rock splitting devices 10 and 20 of the first or second embodiment in that the wedge member 3
This makes it easier to hit the rear end side 31a with a hammer, and in particular, it is easier to hit using a machine such as a breaker hammer. When a breaker hammer is used, the rock splitter 30 can be inserted into a plurality of holes spaced at a predetermined interval, and the wedge member 31 of each rock splitter 30 can be hit continuously. Other configurations and effects of the rock breaking device 30 of the third embodiment are the same as those of the rock breaking device 10 of the first embodiment, and a duplicate description will be omitted.

[0018]

According to the rock splitting device of the present invention, a force for splitting a rock at a deeper position can be applied while maintaining the wedge member at a thickness that is not easily broken.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a use state of a rock splitting device according to a first embodiment of the present invention before hitting a wedge member, and FIG.
Sectional drawing which shows the use condition after hitting the wedge member, (C)
It is a sectional view taken on line CC of (A), and a sectional view taken on line DD of (D) and (A).

FIG. 2 is a sectional view showing a rock breaking device according to a second embodiment of the present invention.

FIG. 3 is a sectional view showing a rock breaking device according to a third embodiment of the present invention.

[Description of Signs] 10, 20, 30 Rock splitting equipment 11, 21, 31 Wedge member 12, 22, 32 Outer member 13, 23, 33 Bundling member 14a, 14b Inclined surface 17 Through hole 18a, 18b Inner inclined surface 19 Groove

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2D065 EA02 EA03 3C069 AA05 BA10 BB01 CA01 EA03

Claims (3)

[Claims] 1. A wedge member and a pair of outer members, wherein the wedge member has a plurality of inclined surfaces intermittently in a length direction so as to become thinner from a rear end side to a front end side. Has a plurality of inwardly inclined surfaces that coincide with the respective inclined surfaces of the wedge member intermittently in the length direction, and the rear end of the wedge member is projected so as to sandwich the wedge member so as to be separable from each other. The feature of rock splitting equipment. 2. The apparatus according to claim 1, further comprising a tying member, wherein said tying member is stretchable and expands when an external force is applied, and ties the distal ends of the outer members together with a force capable of separating them from each other. Item 6. The rock splitting device according to Item 1. 3. The rock breaking device according to claim 1, wherein the wedge member has an edge projecting around the rear end.