JPH0638952Y2 - Rock crusher - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a rock crusher for crushing objects having high strength such as rocks and concrete structures (these are collectively referred to as rocks in the present application). More specifically, it relates to a rock crusher using a shape memory alloy.

"Prior Art" Previously, the present applicants proposed a rock crusher as shown in Fig. 4 as Japanese Patent Application No. 63-160262.

In the above prior application example, a concave portion 2a is provided on the inner surface of each of the loading plates 2 and 2'opposed to each other, and a distance between the both end faces 1a and 1a due to a temperature change is provided between the loading plates 2 and 2 '. A block-shaped shape memory alloy 1 that recovers its shape is increased by accommodating both end faces 1a, 1a into the respective recesses 2a of the loading plate 2, and is stored. The outer surface of the loading plate 2, 2 ' A borehole H (see FIG. 2) in which 20 is drilled into a rock has a curved surface obtained by vertically dividing an inner peripheral cylinder. The rock crusher is inserted into the borehole H and a shape-memory alloy 1 is formed by heating means (not shown). Is heated to expand the bore hole H from the inside by recovering the shape of the shape memory alloy 1 to crush the rock. In addition, in FIG.
Reference numeral 3 shows an expansion and contraction connecting body for connecting both loading plates 2 and 2 '.

[Problems to be solved by the device] As a result of the additional test of the rock crusher, a recovery stress sufficient for rock crushing is obtained by the shape recovery of the shape memory alloy 1, and the crushing time is several tens of seconds to one minute tens of seconds. It was confirmed that it can be remarkably shortened compared with the conventional hydraulic rock crusher.

However, in this rock crusher shown in FIG. 4, the heating means is not yet satisfactory, and the heater wire is wound around each shape memory alloy 1, or the shape memory alloys 1, 1, 1 ... Although it was wound and energized, it was found that this method has a drawback that the assembly is complicated, and that the heater wire is exposed and there is a risk of damage.

Therefore, the present invention has been made in view of the above problems, and it is an object of the present invention to provide a rock crusher which is easy to assemble and is less likely to damage a heater wire.

[Means for Solving Problems] In order to solve the above-mentioned problems, the configuration of the present invention based on the above-mentioned utility model registration claim is in line with the above-mentioned purpose, and a loading plate 2 vertically opposed to each other is provided. , 2 ', an appropriate number of vertical insertion holes 4 are provided, a heater wire 5 is embedded near each insertion hole 4, and a lead wire 5a of the heater wire 5 is extended to the outside. A heat-resistant heater block 6 is provided, and the upper and lower end surfaces 1a, 1a in the insertion hole 4 are subject to temperature changes.
The technical means is adopted in which the block-shaped shape memory alloys 1 each of which recovers its shape so as to increase the distance therebetween are housed.

[Operation] Therefore, the rock crusher of the present invention firstly drills the borehole H in the rock.

Then, the rock crusher of the present invention is inserted into the borehole H such that both end surfaces of the shape memory alloy 1 face the radial direction of the borehole H.

Then, the heater block 6 is energized to heat the shape memory alloy 1. It is the same as the conventional one that the shape memory alloy 1 recovers its shape by this energization and pushes the bore hole H from the inside to exhibit the action of crushing rocks.
In the present invention, the heater block 6 holds the shape memory alloy 1 and the heater wire 5, and the heater block 6 also functions as a shield body in which the heater wire 5 does not directly contact rocks or the like.

[Embodiment] An embodiment of the present invention will be described below with reference to the accompanying drawings.

In the figure, 2 and 2'denotes loading plates that also serve as casings of the rock crusher of the present invention.The loading plates 2 and 2'are vertically (in use, the vertical direction in the figure may be rotated in an appropriate direction when used). Of course it does not matter). It is needless to say that the packing plates 2 and 2'described above are made of a hard material such as iron.

Further, the above-mentioned load plates 2 and 2'are provided with recesses 2a on their inner surfaces, and the upper and lower ends of the heater block 6 described later are fitted into the recesses 2a. May be omitted and may be 1.

Further, the outer surface 20 of the loading plate 2, 2'is a curved surface formed by vertically dividing the inner peripheral surface cylinder of the bore hole H (see FIG. 2) formed in the rock, and at least in the illustrated embodiment. On the outer surface of the one side loading plate 2 ', a slope 21 is provided which is inclined in the longitudinal direction thereof. That is, in FIG. 1, the upper one side loading plate 2'is provided with a groove 22 extending over the entire length, and the bottom surface of the groove 22 is a slope 21 that rises to the right in the drawing. Reference numeral 21 is formed so that the tip end side in the longitudinal direction when inserted into the bore hole H is in a normal height state. The slope 21 is provided outside the one side loading plate 2 '.
A wedge plate 30 having a slope 31 having a wedge sliding slope is arranged. As shown in FIG. 1, the wedge plate 30 is extended on the rear end side (left side in FIG. 1) so that the overall longitudinal dimension is longer than the one side loading plate 2'and one side loading plate 2 '. Is wedge plate 30 even if it is completely inserted into the bore hole H.
The rear end side can be projected from the bore hole H, and the wedge plate 30 can be directly driven from the outside of the bore hole H by the rear end side protruding portion of the wedge plate 30. In addition, at the time of implementation, both slopes 21 and 31 are provided with small intervals such that the cross-section along the longitudinal direction has a fine sawtooth shape, and once the wedge plate 30 is driven in, it does not fall off even if external force is applied. It is also effective to prepare for the future. Further, in the illustrated example, the wedge plate 30 is arranged only on the one side loading plate 2 ′ side, but it goes without saying that the other side loading plate 2 may be similarly provided with the wedge plate 30.

An appropriate number of vertical insertion holes 4 are provided between the load plates 2 and 2'described above, a heater wire 5 is embedded near the insertion hole 4a, and the lead wire 5a of the heater wire 5 is externally provided. A heat-resistant heater block 6 is provided so as to extend to the above.

It is needless to say that the heater block 6 has heat resistance, but it is desirable to use a heater having excellent heat conductivity. In this embodiment, aluminum was used. Unlike the illustrated example, the insertion hole 4 may have a bottomed shape in which only one of the upper and lower ends is opened without communicating with the upper and lower ends, but the heater block 6 is made of a relatively soft material such as aluminum.
When forming, the recovery stress of the shape memory alloy described later is transmitted to the loading plate 2 through the bottom portion thereof, and the efficient use of the recovery stress is hindered. Therefore, it is desirable that the shape communicates to the back side. .

Then, in order to arrange the heater block 6 between the loading plates 2 and 2 ', both loading plates 2 and 2', the heater block 6 and the shape memory alloy 1 which will be described later are separately prepared and used at the site of use. These may be assembled and used, but if this assembly work is still complicated, they may be assembled in advance,
In the illustrated embodiment, foot columns 2b are provided so as to project from both ends of both loading plates 2, 2 ', while the heater block 6 is provided with an arm plate 7 having a through hole 8 through which the foot columns 2b are inserted. Projectingly, the foot post 2b penetrates the arm plate 7 and is prevented from coming off by a snap ring 9, and both loading plates 2 and 2'are connected to the heater block 6 so that they can come into contact with and separate from the heater block 6 within a predetermined range. There are two loading plates,
2'is connected by the expansion joint 3 of the fourth conventional example, and both loading plates 2,
The heater block 6 may be clamped in an elastically stopped state by 2 '.

In addition, it goes without saying that the heater wire 5 embedded in the heater block 6 and the lead wire 5a extending to the outside of the heater block 6 are insulated from each other by a conventional technique without leakage.

In addition, the block-shaped shape memory alloy 1 is housed in the insertion hole 4 so as to recover its shape so that the distance between the upper and lower end surfaces 1a, 1a increases due to temperature change. The shape memory alloy 1 may have a unidirectional property in which it recovers its shape only when a temperature change is applied and is not deformed again even if the temperature is returned to room temperature.
It is desirable to use a bidirectional material that returns to its original shape when the temperature returns to room temperature because it can be used repeatedly. Further, the shape memory alloy 1 may be accommodated in a desired number between the loading plates 2 and 2 '.

"Effect of device" As described above, the device of the present invention uses the both loading plates 2, 2 ', the heater block 6, and the plurality of shape memory alloys 1 as the main constituent parts, so that the temporary use of them Even if it is assembled on site, the work is extremely simple and efficient rock crushing can be performed, and it is possible to provide a rock crusher that can be easily assembled in advance in a factory.

Further, in the present invention, since the heater wire 5 is embedded in the heater block 6, there is no risk of the heater wire 5 being damaged,
It is possible to provide a rock crusher that is safe even if the rock that has been crushed from a high place at the rock crushing site is dropped and reused.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the rock crusher of the present invention, FIG. 2 is a side view, and FIG. 3 is a perspective view of a shape memory alloy used in the embodiments of FIGS. 1 and 2. FIG. 4 is a front view of a conventional example. 1-shape memory alloy, 1a-end face, 2-loading plate, 2'-one side loading plate, 4-insertion hole, 5-heater wire, 5a-lead wire,
6-heater block

Claims (1)

[Scope of utility model registration request] 1. Between the loading plates 2, 2'opposed in the vertical direction,
A heat-resistant heater block 6 having an appropriate number of vertical insertion holes 4, a heater wire 5 embedded in the vicinity of each insertion hole 4, and a lead wire 5a of the heater wire 5 extending to the outside. The upper and lower end faces 1a, 1a are disposed in the insertion hole 4 due to temperature changes.
A rock crusher that stores block-shaped shape memory alloys 1 that recover their shapes so that the distance between them increases.