JP2524336Y2 - Shape memory alloy holder for rock crushing - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a holder of a shape memory alloy for rock crushing.

[Prior Art] The applicant of the present invention has previously disclosed a rock crusher for crushing concrete or rock (hereinafter simply referred to as "rock") using a shape memory alloy (Japanese Utility Model Application No. 63-160262, Japanese Utility Model Application No. 2). −8966
Proposed as No. 5.

In the above conventional example, the former has a pair of loading plates disposed on both sides of the shape memory alloy, and the shape memory alloy is inserted into a borehole formed by drilling the rock together with the pair of loading plates to recover the shape of the shape memory alloy. Crushed,
In the latter, when inserted into the borehole, the clearance between the inner peripheral surface of the borehole and the outer peripheral surfaces of the pair of loading plates causes a reduction in crushing efficiency, so that the distance between the two loading plates cannot be increased by the wedge mechanism. Thus, the generation of the clearance is avoided.

[Problem to be solved by the present invention] In the above conventional example, even if sufficient crushing force is obtained in each case, the crushed rock does not always fall apart, and the degree to which a fine crack is generated Also, if the drilling interval of boreholes and the shape recovery dimension of the shape memory alloy are economically set, the rock will be crushed to the extent that thin cracks are generated, and then impact such as hitting with a hammer will be given. Turned out to be more practical.

However, if the rock is crushed to the extent that small cracks are generated, it is reasonable to recover the shape memory alloy in that state, but in this state, the shape memory alloy is firmly fitted in the borehole in this state It is impossible to pull it out easily, and the shape memory alloy cannot be collected without breaking the rock apart. Further, it is very troublesome to crush a large amount of rocks separately and to find and recover a shape memory alloy from among them, and there is a drawback that it is difficult to recover the entire amount.

[Purpose] In view of the above, the present invention has been made in view of the above, and is a rock crushing shape capable of easily recovering the shape memory alloy in a state where the rock is crushed to the extent that a thin crack is generated by shape recovery of the shape memory alloy. It is intended to provide a memory alloy holder.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the configuration of the present invention can be inserted into a borehole H formed in a rock R in order to solve the above-mentioned problems. A window hole 2 is provided in the upper part of the outer peripheral tip side of a cylindrical main body 1 having a diameter. A slider 3 which is moved by a feed screw 4 is housed in the cylindrical main body 1, and the slider 3 is heated by heating. Provided with a storage space 3a into which shape memory alloys 5, 5, 5,... Which recover shape so as to increase the vertical dimension can be inserted from above, and a slider lid 7 having a wedge slope 7a on the upper surface, Further, a window hole cover 6 having an upper surface serving as an outer peripheral fitting surface 6a of the cylindrical body 1 and a lower surface serving as a slope 6b contacting the wedge slope 7a is detachably provided in the window hole 2 of the tubular body 1. It has taken technical measures.

[Operation] Therefore, the rock memory crushing shape memory alloy holder positions the sliding position of the slider 3 such that the window hole cover 6 is positioned closest to the center of the cylindrical main body 1. The tip portion is inserted into a borehole H having a hole drilled in a rock R as shown in FIG.

When the slider 3 is slid by the feed screw 4 (in the illustrated example, the slider 3 is slid leftward in FIG. 1), the window hole lid 6 is moved in the radially expanding direction by the wedge slopes 7a and 6b. It has the effect of filling the clearance with the borehole H for moving.

When the shape memory alloys 5, 5, 5,... Are heated by conventionally known means, the rock R is crushed as in the related art.
Even if a reciprocating transformation type is used as the shape memory alloy 5, since the shape memory alloy does not undergo shape transformation in the shrinkage direction immediately after cooling, a small crack is generated in the rock R in this state. This cylindrical body 1 is still firmly fitted in the borehole,
It is difficult to extract this. Therefore, by sliding the slider 3 in the original position direction (to the right in FIG. 1) by the feed screw 4, the window hole lid 6 has an action of having a play that can move in the diameter reducing direction. It is.

Next, an embodiment of the present invention will be described with reference to the accompanying drawings.

In the figure, R is a rock to be crushed, and drilling of bore holes H at appropriate intervals in this rock R is the same as in the prior art.

Reference numeral 1 denotes a cylindrical main body. The cylindrical main body 1 has a diameter that can be inserted into the bore hole H formed in the rock R, and a window hole 2 is provided in an upper portion on the outer peripheral tip side.

The cylindrical body 1 is inserted into the bore hole H at the tip end,
The rear end side is formed using a steel pipe or the like having a length that protrudes out of the rock R. In particular, the front end portion inserted into the borehole H is hard so as not to be deformed even when a large force is applied. In this embodiment, it is desirable to use a hard steel pipe 1a on the front end side and a normal steel pipe 1b on the rear end side, and screw the hard steel pipe 1a and the normal steel pipe 1b in the middle. It is composed by connecting with 1c. The tubular body 1 may be formed in a straight tubular shape. In the illustrated embodiment, a handle portion 10 is provided on the rear end side in a state orthogonal to the tubular body 1 and the handle portion 10 is gripped. The cylindrical body 1 can be prevented from rotating when the bored hole H is inserted into or removed from the bored hole H and the feed screw 4 is rotated. In the present embodiment, a borehole is provided at the tip of the cylindrical body 1. In order to facilitate the insertion into the tapered end, a tapered pointed portion 1d having a gradually decreasing diameter on the distal end side is provided.

The slider 3 that is moved by the feed screw 4 is housed in the tubular main body 1.

In the illustrated embodiment, the feed screw 4 has a screw rod 41 projecting from the rear end of the slider 3, and a screw cylinder 42 screwed to the screw rod 41 is formed in a through hole provided in the rear wall 1 e of the cylindrical main body 1. 1f, and the screw cylinder 42 has a cylindrical
A flange portion 43 is provided at an inner portion of the cylindrical body 1 and a screw rod portion 44 is provided at an outer portion of the tubular main body 1. The rear wall 1e is provided on both sides of the flange portion 43 and a fastening nut 46 screwed to the screw rod portion 44. The screw cylinder 42 is sandwiched and rotatably held through bearings 45, 45 provided. Further, a spanner hook 47 for rotating the screw cylinder 42 is continuously provided at the rear end of the screw cylinder 42. In addition, this feed screw 4
Is not limited to the illustrated example. For example, a screw rod is protruded from the rear end of the slider 3 via a rotary joint, and this screw rod is screwed to the cylindrical main body 1 and the rear end is formed on the rear wall 1e.
It is possible to change to a conventionally known configuration, such as by projecting further to the outside and connecting a spanner hook to the rear end of the screw bar.

The shape memory alloys 5,5,5, which recover shape so that the vertical dimension increases by heating, are provided on the slider-3.
.. Can be inserted from above.
And a slider lid 7 having a wedge slope 7a on the upper surface.

In the illustrated example, a plurality of the shape memory alloys 5, 5, 5,... Are housed in the plurality of storage space portions 3a, but the shape and the number thereof are not particularly limited. . The lower surface of the slider lid 7 has a shape memory alloy 5, 5,
.. Are fitted so as to be in contact with the upper surface of 5...

The slider 3 has heater insertion holes 3b, 3b, 3b
Are provided so that electric heater rods, not shown, can be inserted into the insertion holes 3b, 3b, 3b,. It is desirable that the energizing line W to the electric heater rod is not loosened even by sliding of the slider 3. In the illustrated example, the energizing line W is provided at one end in the handle portion 10. A pulley 13 fixed by a portion 11 and stopped by a spring 12 is provided on the other end side in the handle portion 10, and the energizing wire W is turned back from the holding portion 11 by the pulley 13 and connected to an electric heater rod. Even if the slider 3 slides a predetermined distance on the electric wire W, the pulley 13 is displaced so that tension always acts.

Further, the window hole 2 of the cylindrical main body 1 is detachably provided with a window hole lid 6 having an upper surface serving as an outer peripheral fitting surface 6a of the cylindrical main body 1 and a lower surface serving as a slope 6b contacting the wedge slope 7a. Do it.
When the slider 3 is at a predetermined position, the window cover 6 is adapted so that its outer peripheral surface 6a conforms to the extended line of the outer periphery of the cylindrical body 1. That is, when the cylindrical body 1 has a circular cross section, the outer peripheral The fitting surface 6a is a curved surface that forms a part of the peripheral surface of the tubular main body 1.

[Effects of the Invention] Since the present invention is as described above, the clearance with the inner peripheral surface of the borehole H can be appropriately changed by sliding the slider with the feed screw 4, and when the rock R is crushed, the clearance is reduced. It is possible to provide a holder for a rock-crushing shape memory alloy that enables efficient crushing without the crushing and reproduces the clearance portion after the crushing to easily recover the shape memory alloy 5 together with the cylindrical main body 1. It is.

Further, as described above, since the clearance between the cylindrical body 1 and the borehole H can be reproduced at the end of the rock R in the present invention, the shape memory alloy 5 is compared with the shape memory alloy 5 whose shape transformation is of the reciprocating direction. Inexpensive and unidirectional type can be used, which has a remarkable effect of enabling economical crushing by a shape memory alloy.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a shape memory alloy holder for rock crushing of the present invention, and FIG. 2 is a sectional view taken along line AA. R ~ rock, H ~ borehole, 1 tubular body, 2 window hole,
3-slider 3a-storage empty space, 4-feed screw, 5-shape memory alloy, 6-
Window hole lid, 6a-outer periphery fitting surface, 6b-slope, 7-slider lid 7a-wedge slope

Claims (1)

(57) [Scope of request for utility model registration] 1. A window hole 2 is provided in an upper portion of a cylindrical main body 1 having a diameter capable of being inserted into a bore hole H formed in a rock R, on an outer peripheral end side, and a feed screw 4 is provided in the cylindrical main body 1. The slider 3 has a storage space 3a into which a shape memory alloy 5, 5, 5,... That recovers the shape so that the vertical dimension increases by heating can be inserted from above. A slider lid 7 having a wedge slope 7a on the upper surface is provided. Further, the window hole 2 of the cylindrical body 1 has an upper surface corresponding to the outer peripheral fitting surface 6a of the cylindrical body 1 and a lower surface corresponding to the wedge slope 7a. A shape memory alloy holder for rock crushing, in which a window hole cover 6 formed as a contacting slope 6b is detachably provided.