JP5824713B1 - Breaker and crushing method using the breaker - Google Patents

Abstract

An object of the present invention is to provide a piston at a rear end portion of a wedge member in which a tapered tip portion is inserted between a plurality of pressing members inserted into a drilling hole formed in a processing object such as a rock, bedrock or concrete structure. The operation of moving the plurality of pressing members to the outside in the radial direction of the drilling hole by hitting them and crushing the periphery of the drilling hole is performed while preventing the occurrence of idle driving. A cylinder portion in which an insertion space into which a rear end portion of a wedge member can be loosely inserted is provided at a tip portion, a piston that reciprocates in the front-rear direction inside the cylinder portion, a piston and an insertion space inside the cylinder portion, A striking transmission member that transmits the striking by the piston to the wedge member by receiving the striking by the piston while the front end surface abuts the rear end surface of the wedge member loosely inserted in the insertion space. One of the front end surface of the impact transmission member and the rear end surface of the wedge member has a curved concave surface and the other has a curved convex surface, and the front end surface of the impact transmission member and the rear end surface of the wedge member can be in sliding contact with each other It has become. [Selection] Figure 4

Description

  The present invention provides a piston at a rear end portion of a wedge member in which a tapered tip end portion is inserted between a plurality of pressing members inserted in a drilling hole formed in a processing object such as a rock mass, a rock, or a concrete structure. The present invention relates to a breaker that crushes the periphery of the hole by moving a plurality of pressing members radially outward of the hole by giving an impact by, and a crushing technique that crushes a processing object using the breaker.

  Conventionally, a wedge member (sometimes called a wedge) and a blade member (sometimes called a liner) are used as a split rock tool for splitting a processing object such as a rock, bedrock, or concrete structure. The so-called Seri-ya has been known. For example, in Patent Document 1, a drilling hole is previously formed in a rock drill with a rock drill, and a wedge rock (arrow) and a blade member (blade) are combined into a drilling rock tool (seri arrow), and then a wedge is inserted. The rear end of the member is struck by a breaker and the wedge member is press-fitted, so that a plurality of blade members slide relative to the inclined surface formed at the front end of the wedge member while radially outside the hole. The inner wall of the drilling hole is pressed, and the rock is crushed by splitting.

Japanese Patent Laying-Open No. 2006-225925 (FIG. 3)

  However, in the invention described in Patent Document 1, since the wedge member set in the drilling hole is directly hit by the piston of the breaker, it is difficult to perform the hit accurately and stably, There is a possibility that a so-called “empty shot” may occur. This is because it is difficult to form a drilling hole in the planned direction, that is, in the hole forming direction with respect to the object to be processed, and even if the hole is formed in the hole forming direction, the blade member or wedge In many cases, the member is set to be inclined with respect to the drilling hole, and in such a situation on the spot, the piston advancing / retreating direction (corresponding to the “front-rear direction” in the present invention) is completely set with respect to the direction in which the wedge member is pressed. Because it is difficult to match.

  The present invention has been made in view of the above problems, and a tapered tip portion is inserted between a plurality of pressing members inserted into a drilling hole formed in a processing object such as a rock, rock, or concrete structure. The operation of crushing the periphery of the drilling hole by moving the plurality of pressing members radially outward of the drilling hole by hitting the rear end of the wedge member with the piston is performed while preventing the occurrence of idle driving It is an object of the present invention to provide a breaker capable of cutting and a crushing method capable of efficiently crushing the periphery of a drilling hole using the breaker.

  In one aspect of the present invention, the rear end portion of a wedge member having a tapered front end portion is hit, and the front end portion of the wedge member is press-fitted between a plurality of blade members inserted into a hole to be processed. Thus, while sliding the plurality of blade members relative to the inclined surface formed at the tip of the wedge member, the blade member is moved radially outward of the drilling hole to press the inner wall of the drilling hole. A breaker for crushing the surroundings, a cylinder part in which an insertion space in which the rear end part of the wedge member can be loosely inserted is provided at the tip part, a piston that reciprocates in the front-rear direction inside the cylinder part, and an inside of the cylinder part The impact of the piston is transmitted to the wedge member by receiving the impact of the piston at the rear end surface while the front end surface is in contact with the rear end surface of the wedge member that is disposed between the piston and the insertion space and is loosely inserted into the insertion space. And a tip of the hit transmission member. One of the surface and the rear end surface of the wedge member has a curved concave surface and the other has a curved convex surface, and the front end surface of the impact transmitting member and the rear end surface of the wedge member are slidable in contact with each other. Yes.

  Another aspect of the present invention is a crushing method, wherein a wedge is interposed between a step of inserting a plurality of blade members into a hole formed in a processing object and a plurality of blade members inserted into the hole. A step of inserting a tapered tip portion of the member, and a rear end portion of a wedge member, the tip portion of which is inserted between a plurality of blade members, being inserted into the insertion space of the breaker to wedge the tip end surface of the impact transmission member The step of sliding contact with the rear end surface of the member and the rear end portion of the wedge transmission member are slid against each other while striking the rear end portion of the wedge member with the breaker piston through the impact transmission member. And a step of crushing the periphery of the drilling hole.

  As described above, according to the present invention, the impact transmission member is disposed between the piston and the insertion space. The impact transmission member is provided inside the cylinder portion together with the piston, and receives impact of the piston at the rear end surface. Further, the front end surface of the impact transmitting member is a curved concave surface (or curved convex surface), and is in sliding contact with the rear end surface of the wedge member having the curved convex surface (or curved concave surface). For this reason, not only when the front-rear direction of the piston is completely coincident with the press-fitting direction of the wedge member, the piston surely strikes the impact transmission member even if it is slightly inclined, and the impact force is It is transmitted to the wedge member via the transmission member. As a result, the periphery of the drilling hole can be crushed without causing idle shots.

It is a figure which shows the rock rock tool and breaker used when implementing one Embodiment of the crushing method concerning this invention. It is a figure which shows the structure of the split rock tool used when implementing one Embodiment of the crushing method concerning this invention. It is a figure which shows typically the internal structure of the breaker used when implementing one Embodiment of the crushing method concerning this invention. It is a figure which shows the insertion state of the wedge member to the front-end | tip part (insertion space) of the breaker shown in FIG. It is a figure which shows typically the internal structure and drawing process of a drawing tool used when implementing one Embodiment of the crushing method concerning this invention. It is a figure which shows typically the split rock process of the process target object using a split rock tool and a breaker. It is a figure which shows typically the extraction process of the wedge member by an extraction tool. It is a figure which shows typically other embodiment of the crushing method concerning this invention.

The crushing method according to the present invention includes the following steps (1) to (6),
Step (1): forming a hole in a processing object such as rock, bedrock or concrete structure,
Step (2): preparing a split rock tool composed of a wedge member, a plurality of blade members, and a connecting mechanism for connecting the plurality of blade members to each other;
Step (3): Inserting a plurality of blade members into the drilling hole,
Step (4): inserting the tip of the wedge member between the plurality of blade members,
Step (5): The front end surface of the hitting transmission member of the breaker is brought into sliding contact with the rear end surface of the wedge member, and the wedge member is hit through the hitting transmission member with the piston of the breaker while maintaining the sliding contact state. Press-fit the tip of the wedge member,
Step (6): After removing the breaker, a pulling tool is set at the rear end of the wedge member, and the wedge member is pulled out by using the pulling tool, and then a plurality of blade members connected to each other by a connecting mechanism are provided. to recover,
Is used to smash the object to be processed and crush the periphery of the drilling hole. In particular, in order to increase the crushing efficiency, the following explained swarf tools, breakers, and extraction tools are used. Hereinafter, after explaining the apparatus configuration with reference to FIGS. 1 to 5, the crushing method will be described in detail.

  FIG. 1 is a view showing a swarf tool and a breaker used in carrying out an embodiment of a crushing method according to the present invention. The split rock tool 1 can be inserted / removed between two blade members 11 and 12, a connecting mechanism 13 that connects the rear ends of the blade members 11 and 12, and between the blade members 11 and 12. And a wedge member 14 formed on the surface. The two blade members 11 and 12 are connected to each other by the connecting mechanism 13. In this specification, the direction X in which the hole 21 is formed with respect to the processing object 2 is referred to as a “hole forming direction”, the side proceeding in the X direction is referred to as the “front end side”, and the opposite side is referred to as the “rear end”. Referred to as “side”. Further, a direction Y in which the blade members 11 and 12 are arranged in a direction orthogonal to the hole forming direction X is referred to as an “arrangement direction”.

  FIG. 2 is a diagram showing a configuration of a swarf tool used when an embodiment of the crushing method according to the present invention is executed. In the same figure, the (a) to (e) drawings shown in the direction of the one-dot chain line are respectively a top view of the blade member, a sectional view of the blade member at three different height positions in the X direction, and the blade. It is a bottom view of a member. In this split rock tool 1, the blade members 11 and 12 have the same shape and the same dimensions. Therefore, while the configuration of the blade member 11 will be described below, the components of the blade member 12 are denoted by the same reference numerals and the description thereof is omitted.

  The blade member 11 includes a flange portion 11a and a pressing portion 11b extending from the lower surface of the flange portion 11a in a direction parallel to the hole forming direction X. As can be seen from FIGS. 2A and 2E, the flange portion 11a has a sufficiently larger planar size than the pressing portion 11b. More specifically, the plane size combined with the flange portions 11a and 12a has a larger plane size than the drilling hole 21, whereas the plane size combined with the pressing portions 11b and 12b has a smaller plane size than the drilling hole 21. Have.

  The flange portion 11a is provided with two through holes 11c and 11d spaced apart from each other by a certain distance in a direction perpendicular to the XY plane, and the flange portion 12a is provided with two through holes 12c and 12d by a certain distance from each other. They are spaced apart in the direction orthogonal to the XY plane. By arranging the inclined surfaces to face each other as described above, the through holes 11c and 12c are arranged in a straight line in the Y direction, and the through holes 11d and 12d are arranged in a straight line in the Y direction.

  The surface of the pressing portion 11b that faces the inner wall of the hole 21 is formed with an arc surface along the hole forming direction X as a basic shape, and as a pressing surface that presses the inner wall of the hole 21 as will be described later. Function. Note that the arc surface here does not need to be strictly a part of a circle, and includes a case where the cross section is a part of an ellipse. Moreover, in the press part 11b, the inclined surface is formed in the opposite side to a circular arc surface (press surface). The two blade members 11 and 12 are integrated by connecting the flange portions 11a and 12a to each other by the connecting mechanism 13 described in detail below in a state where the inclined surfaces face each other.

  The coupling mechanism 13 is formed by coil springs 131 to 133, a bolt 134, a nut 135, and two washers 136. A coil spring 132 is arranged so as to be sandwiched between through holes 11c and 12c formed in the flange portions 11a and 12a, respectively. A coil spring 131 is disposed on the (−Y) direction side of the through hole 11c, and a coil spring 133 is disposed on the (+ Y) direction side of the through hole 12c. The bolt 134 is inserted through the (−Y) side washer 136, the coil spring 131, the through hole 11c, the coil spring 132, the through hole 12c, the coil spring 133, and the (+ Y) side washer 136, and the tip of the bolt 134 is inserted. A nut 135 is screwed into the male screw portion. In addition, coil springs 131 to 133, bolts 134, nuts 135, and two washers 136 are also provided on the through holes 11d and 12d side as described above.

  The coil spring 132 urges the blade members 11 and 12 to be separated from each other in the Y direction. The head of the bolt 134 restricts the movement of the blade member 11 in the (−Y) direction, and the nut 135 restricts the movement of the blade member 12 in the (+ Y) direction. The coil spring 131 is disposed between the blade member 11 and the head of the bolt 134 to urge the blade member 11 in the (+ Y) direction with respect to the head of the bolt 134. Further, the coil spring 133 is disposed between the blade member 12 and the nut 135 to urge the blade member 12 against the nut 135 in the (−Y) direction.

  By providing the connecting mechanism 13 in this manner, the blade members 11 and 12 are connected to each other while being guided by the cylindrical portion of the bolt 134 so as to be movable in the Y direction. Can be adjusted by a nut 135. Further, when the tip portions of the blade members 11 and 12, that is, the pressing portions 11 b and 12 b are inserted into the hole 21, the flange portions 11 a and 12 a are locked to the peripheral surface of the hole 21, and further insertion is possible. Due to the restriction, the split rock tool 1 can be set to the drilling hole 21. Furthermore, the space sandwiched between the inclined surfaces by the integration of the blade members 11 and 12 has a tapered shape that becomes thinner toward the tip side of the blade members 11 and 12. A wedge member 14 having a tapered shape is inserted into this tapered space in the same manner as this space.

  FIG. 3 is a diagram schematically showing the structure of the wedge member and the internal structure of the breaker used when carrying out one embodiment of the crushing method according to the present invention. FIG. 4 is a view showing a state in which the wedge member is inserted into the tip portion (insertion space) of the breaker shown in FIG. Here, after describing the configuration of the wedge member 14 with reference to FIG. 3, the configuration of the breaker 3 will be described with reference to FIGS. 3 and 4.

  As shown in FIG. 3B, the tip of the wedge member 14 has a rectangular shape in a cross section orthogonal to the X direction, and has a tapered shape in which the thickness in the Y direction decreases toward the tip. The (−Y) side surface and the (+ Y) side surface are inclined surfaces. Further, at the rear end portion 14 b of the wedge member 14, a gripped portion 14 c that is gripped by the engaging members 44 and 45 (FIG. 5) of the extraction tool 4 is provided. In the gripped portion 14c, concave portions 14d are provided on the (−Y) direction side surface and the (+ Y) direction side surface, and the engagement members 44 and 45 of the extraction tool 4 are inserted into the concave portions 14d so as to be sandwiched between the wedge members 14. Is held by the extraction tool 4. On the other hand, when the engaging members 44 and 45 are disengaged from the recesses 14d, the holding of the wedge member 14 by the extraction tool is released. Each inclined surface 14a of the wedge member 14 is provided with a groove portion 14f so as to communicate with oil reservoirs 11e and 12e formed on the upper surfaces of the flange portions 11a and 12a. In FIG. 3A, only the groove 14f formed on the (+ Y) side inclined surface 14a is shown, but the same groove is formed on the opposite inclined surface 14a. Further, as shown in FIGS. 2A to 2D, the groove portions 11f and 12f are also formed in the oil reservoir portions 11e and 12e on the inclined surfaces of the blade members 11 and 12 that are in sliding contact with the inclined surfaces 14a. It is provided to communicate. For this reason, the lubricating oil is stored in the oil reservoirs 11e and 12e before the split rock treatment, so that the lubricating oil slides between the wedge member 14 and the blade members 11 and 12 through the grooves 11f, 12f and 14f. Supplied to the surface. In addition, in this embodiment, although the groove part is provided in both the blade members 11 and 12 and the wedge member 14, you may provide a groove part only in any one. In addition, the number of groove portions is also formed on each inclined surface, but the number and shape of the groove portions are arbitrary. Moreover, you may comprise so that oil supply may be performed along an inclined surface, without providing a groove part. Further, reference numerals 137 and 137 in FIG. 2 are hooks for suspending a connecting body formed by connecting the blade members 11 and 12 by the connecting mechanism 13, and the hooks 137 and 137 are upper surfaces of the flange portions 11a and 12a, respectively. It is possible to attach a wire (not shown).

  Further, the rear end portion 14b of the wedge member 14 has a tapered shape in the (−X) direction, and is formed at the front end portion 311 of the cylinder portion 31 which is one of the components of the breaker 3 described below. The insertion space SP can be loosely inserted. Further, the end surface of the rear end portion 14b, that is, the rear end surface 14e of the wedge member 14 is finished to be a curved convex surface, and can slide with respect to the front end surface of the impact transmission member 33 constituting the breaker 3 described below. ing.

  The breaker 3 functions to hit the rear end portion 14b of the wedge member 14 configured as described above and press-fit the front end portion of the wedge member 14 between the blade members 12. More specifically, the breaker 3 is attached to an arm 51 of a construction vehicle 5 such as a hydraulic power shovel via a bracket 52 as shown in FIG. Therefore, the operator can control the position and posture of the breaker 3 by operating the operation lever of the construction vehicle 5 and controlling the position and angle of the arm 51.

As shown in FIGS. 3 (c) and 4, the breaker 3 has a cylinder portion 31 that functions as a main body portion of the breaker 3, and a recess is provided at the tip of the cylinder portion 31. An insertion space SP in which the rear end portion 14b of the wedge member 14 can be loosely inserted is formed by the recess. Further, on the rear end side, that is, the (−X) direction side with respect to the insertion space SP, the piston 32 is provided so as to be capable of reciprocating in the front-rear direction inside the cylinder portion 31. Further, the impact transmission member 33 is disposed between the piston 32 and the insertion space SP. The front end surface 331 of the impact transmission member 33 is finished to be a curved concave surface. In this embodiment, the curvature radius r33 of the front end surface 331 of the impact transmission member 33 and the curvature radius r14 of the rear end surface 14e of the wedge member 14 are:
r33 = −r14
The front end surface 331 of the impact transmission member 33 and the rear end surface 14e of the wedge member 14 are slidable with each other. Therefore, as shown in FIG. 4A, the axis AX3 of the piston 32 (the rotational symmetry of the piston 32) with respect to the axis AX1 of the wedge member 14 (the axis extending from the front end of the wedge member 14 to the center of rotation of the rear end surface 14e). 4), the axis AX3 of the piston 32 is inclined with respect to the axis AX1 of the wedge member 14 as shown in FIG. 4B, for example. Even when the angle between the front-rear direction and the press-fitting direction of the wedge member 14 is not zero, the front end surface 331 of the impact transmission member 33 and the rear end surface 14e of the wedge member 14 are in contact with each other.

  On the other hand, regardless of whether the angle AX1 of the wedge member 14 and the axis AX3 of the piston 32, that is, the inclination angle is zero, the impact transmission member 33 and the piston 32 are provided inside the cylinder portion 31, The rear end surface 332 of the impact transmission member 33 faces the front end surface 321 of the piston 32. That is, in this embodiment, the piston 32 and the impact transmission member 33 are arranged in a line in the direction of the axis AX3 inside the cylinder portion 31, and the axis (not shown) of the impact transmission member 33 always coincides with the axis AX3. ing. Therefore, even if the axes AX1 and AX3 are inclined with respect to each other within a range in which the posture of the rear end portion 14b of the wedge member 14 fluctuates in the insertion space SP, the piston 32 reciprocates back and forth in the front-rear direction. The impact is applied to the rear end surface 332 of the impact transmitting member 33 without being generated. The striking force is applied to the wedge member 14 via the striking transmission member 33.

  As described above, in the present embodiment, the rear end portion 14b of the wedge member 14 is loosely inserted into the insertion space SP, and the recess provided in the distal end portion 311 of the cylinder portion 31 and the rear end portion 14b of the wedge member 14 are arranged. There is a gap between them. Therefore, in the present embodiment, as shown in FIGS. 3C and 4, the O-ring 34 is provided around the inner peripheral surface of the recess so as to surround the insertion space SP in the vicinity of the opening of the insertion space SP. Yes. Thus, in a state where the rear end portion 14b of the wedge member 14 is loosely inserted into the insertion space SP, the O-ring 34 elastically contacts the peripheral surface of the rear end portion 14b and the rear end portion 14b of the wedge member 14 The gap with the recess is closed. In this way, the O-ring 34 functions as a seal member that closes the insertion space SP from the distal end side of the cylinder portion 31, that is, the (+ X) direction side. As a result, it is possible to suppress the impact sound generated inside the cylinder part 31 from leaking and to efficiently suppress the noise caused by the impact.

  1, 3 </ b> C, and 4, reference numeral 35 denotes a direction parallel to the axis AX <b> 3 of the piston 32 by engaging with a notch 333 formed on the side surface of the impact transmission member 33. The reference numeral 36 designates a switching valve that controls the reciprocating motion of the piston 32 in the front-rear direction by alternately switching the high-pressure oil passage and the low-pressure oil passage. .

  FIG. 5 is a view schematically showing an internal structure of a drawing tool and a drawing process used when carrying out an embodiment of the crushing method according to the present invention, and FIG. The configuration before gripping 14b and performing the pulling process is shown, and FIG. 5B shows the configuration when the rear end portion 14b of the wedge member 14 is gripped. This extraction tool 4 has a cap member 41 so as to cover the gripping portion 14c of the rear end portion 14b of the wedge member 14 from above. Openings 42 and 43 are provided on the (−Y) side surface and the (+ Y) side surface of the cap member 41. And the engaging members 44 and 45 are attached with respect to the opening parts 42 and 43 so that advancing and retreating to a Y direction, respectively. The (+ Y) side end of the engaging member 44 and the (−Y) side end of the engaging member 45 can enter the recesses 14d and 14d through the openings 42 and 43, respectively, and FIG. ), The gripped portion 14c of the wedge member 14 is sandwiched and gripped from the Y direction by the engagement members 44 and 45 entering. Therefore, the wire 48 is attached to the hook 47 provided on the top 46 of the cap member 41 in this gripped state, and the wedge member 14 is lifted upward by winding up the wire 48 by a crane car (not shown), thereby the blade member 11. , 12 can be pulled out.

  Next, a method for splitting and crushing the processing object 2 using the split rock tool 1, the breaker 3 and the extraction tool 4 configured as described above will be described with reference to FIGS. FIG. 6 is a diagram schematically showing the split rock processing of the processing object using the split rock tool and the breaker. Further, FIG. 7 is a diagram schematically showing the extraction process of the wedge member by the extraction tool.

  In this embodiment, as shown in FIG. 6A, a hole 21 having an inner diameter d is formed in the processing object 2 in the (+ X) direction (a hole forming step). In parallel with this, a coupling body (= blade members 11, 12 + coupling mechanism 13) to be inserted into the hole 21 is prepared (preparation step). In this preparation process, the blade members 11 and 12 are disposed so that the inclined surfaces face each other, and the coil spring 131, the through hole 11c, the coil spring 132, the through hole 12c, and the coil spring 133 are arranged. After penetrating and inserting the bolt 134, the nut 135 is screwed into the male screw portion at the tip of the bolt 134. At this time, as shown in FIG. 6A, the nut 135 is fed to the head side of the bolt 134 while resisting the urging force of the coil springs 131 to 133, and the separation distance between the bolt 134 and the nut 135 is set to a distance W10 (> d ), The width W of the pressing portions 11b and 12b is adjusted to be narrower than the inner diameter d of the hole 21. In this embodiment, coil springs 131 to 133 having substantially the same spring characteristics are used, and the coil springs 131 to 133 at the time of completion of the adjustment have lengths W11 to W13 (W11 = W12 = W13), respectively. Have. Of course, the use of the same coil springs 131 to 133 is not an essential requirement, and is optional. For example, the coil springs 131 and 133 are the same while the coil spring 132 is different from the coil springs 131 and 133. It may be used.

  The connecting body in which the widths W of the pressing portions 11b and 12b are adjusted to be less than the inner diameter d is suspended by a crane truck or the like, and the pressing portions 11b and 12b are inserted into the hole 21 as shown in FIG. To do. When the flanges 11a, 12a and the connection mechanism 13 reach the surface of the object 2 to be processed, the suspension of the connection body by the crane truck is released, and then the nut 135 is loosened to increase the distance between the bolt 134 and the nut 135 by the distance. Adjust to W20 (> W10). During this adjustment, the pressing portions 11 b and 12 b are moved in the (−Y) direction and the (+ Y) direction by the biasing force of the coil spring 132, respectively, and the arc surfaces (pressing surfaces) of the pressing portions 11 b and 12 b are moved to the hole 21. It is made to contact | abut to an inner wall (FIG.6 (b)). For this reason, the circular arc surfaces of the pressing portions 11 b and 12 b can be brought into close contact with the inner wall of the hole 21. Note that the lengths W21 to W23 of the coil springs 131 to 133 at this time are all the same value, and the lengths W21 to W23 are longer than the lengths W11 to W13 immediately before insertion along with the adjustment.

  When the insertion of the blade members 11 and 12 into the hole 21 is completed in this way, as shown in FIG. 6C, a substantially inverted triangular prism (wedge shape) space (illustrated) formed between the pressing portions 11b and 12b. The tip of the wedge member 14 is inserted into (omitted). Accordingly, the inclined surfaces of the pressing portions 11b and 12b are positioned on the inclined surface 14a (see FIG. 3) of the wedge member 14, and the pressing portions 11b and 12b can slide relative to the wedge member 14. Yes. Note that the lengths W31 to W33 of the coil springs 131 to 133 at the time when the leading end portion of the wedge member 14 is inserted into the space are all the same value and substantially the same as the lengths W21 to W23.

  Here, in order to make the pressing portions 11b and 12b slide smoothly on the inclined surface 14a, the oil reservoir portion 11e, after inserting the wedge member 14 between the blade members 11 and 12 or during the insertion, It is desirable to inject lubricating oil into 12e and store it. That is, the lubricating oil stored in the oil reservoirs 11e and 12e is supplied to the tip side through the inclined surface 14a, and the lubricating oil spreads over the entire sliding surface, so that the next wedge member 14 is smoothly pressed. In addition, as will be described later, it is also easy to extract from between the pressing portions 11b and 12b.

  When the insertion of the connecting body (= blade members 11, 12 + connecting mechanism 13) into the drilling hole 21 currently targeted for the split rock and the insertion of the tip of the wedge member 14 between the pressing portions 11b, 12b are completed, the operator Positions the breaker 3 so that the insertion space SP is positioned immediately above the rear end portion 14 b of the wedge member 14. At this time, as shown in FIG. 4B, the axis AX1 of the wedge member 14 and the axis AX3 of the piston 32 may not coincide with each other. The breaker 3 is moved toward the rear end portion 14b of the wedge member 14, the rear end portion 14b is inserted into the insertion space SP, and the front end surface 331 of the impact transmission member 33 and the rear end surface 14e of the wedge member 14 are brought into sliding contact. . Thus, in this embodiment, as shown in FIG. 4, the rear end surface 332 of the impact transmission member 33 faces the front end surface 321 of the piston 32, and the front end surface 331 of the impact transmission member 33 is the rear end surface of the wedge member 14. 14e is in sliding contact. Therefore, the striking force of the piston 32 is reliably applied to the wedge member 14 via the striking transmission member 33 without causing an idling.

  Thus, the wedge member 14 that has been hit by the piston 32 is press-fitted in the hole forming direction X. On the other hand, the blade members 11 and 12 move in the (−Y) direction and the (+ Y) direction while sliding relative to the inclined surface 14 a of the wedge member 14, respectively, and press the inner wall of the hole 21. As a result, the processing object 2 is split and the periphery of the drilling hole 21 is crushed. Further, as the blade members 11 and 12 move in the Y direction, the length W42 of the coil spring 132 becomes longer than the length W32 before press-fitting, whereas the lengths W41 and W43 of the other coil springs 131 and 133 are It becomes shorter than the lengths W31 and W33 before press-fitting. Such crushing processing is continued while moving the breaker 3 in the X direction, and the crushing range is expanded in the (+ X) direction. Thereafter, the piston 32 is moved in the direction opposite to that when the breaker 3 is loosely inserted after stopping the forward / backward movement of the piston 32, and the distal end portion 311 of the cylinder portion 31 is separated from the rear end portion 14 b of the wedge member 14.

  Next, as shown in FIG. 7A, the extraction tool 4 suspended from a crane truck (not shown) is moved to the rear end portion 14 b of the wedge member 14, and the wedge member 14 has a rear end portion 14 b. Cover the gripped portion 14c with the cap member 41 from above. Then, the (+ Y) side end portion of the engaging member 44 and the (−Y) side end portion of the engaging member 45 are advanced into the recesses 14d and 14d, and the gripped portion 14c of the wedge member 14 is sandwiched from the Y direction and gripped. (FIG. 7B). As a result, only the wedge member 14 is held by the extraction tool 4. In this state, the wedge member 14 is pulled out from the blade members 11 and 12 together with the pulling tool 4 by pulling up the pulling tool 4 with a crane truck. Therefore, although the wedge member 14 and the blade members 11 and 12 are relatively firmly in close contact with each other at the end of the crushing process, the wedge member 14 can be removed from the hole 21 by overcoming the contact force by using the extraction tool 4. It can be easily recovered. Since the wedge member 14 is pulled out, there is no pressing force applied to the inner wall of the hole 21 by the blade members 11 and 12, and the periphery of the hole 21 has already been crushed. 12+ coupling mechanism 13) can be recovered from the object to be treated 2 in one piece. Of course, the coupling body may be recovered after the nut 135 is fed to the head side of the bolt 134 and the width W of the pressing portions 11b and 12b is adjusted to be less than the inner diameter d. It becomes possible.

  As described above, in the present embodiment, the breaker 3 corresponds to the provision of the piston 32 and the impact transmission member 33 inside the cylinder portion 31 and the rear end surface 14e of the wedge member 14 being finished to a curved convex surface. Thus, the front end surface 331 of the impact transmission member 33 is finished to be a curved concave surface. Therefore, regardless of whether the axis AX1 of the wedge member 14 and the axis AX3 of the piston 32 coincide with each other, the front end surface 331 of the impact transmission member 33 is in sliding contact with the rear end surface 14e of the wedge member 14, and the piston 32 is idled. The hit transmission member 33 is hit without being hit, and the hitting force is applied to the wedge member 14 via the hit transmission member 33. Therefore, it is possible to efficiently crush the periphery of the hole 21 while reliably preventing the occurrence of idling in the breaker 3.

  Further, since the gap between the rear end portion 14b of the wedge member 14 and the concave portion forming the insertion space SP is closed by the O-ring 34, it is possible to suppress the impact sound generated inside the cylinder portion 31 from leaking and Noise can be efficiently suppressed.

  The present invention is not limited to the above-described embodiment, and various modifications other than those described above can be made without departing from the spirit of the present invention. For example, in the above-described embodiment, the above steps (2) to (6) are continuously executed for one drilling hole 21, but all or a part of these steps may be performed in parallel. For example, as shown in FIG. 8, a plurality of drill holes 21 may be formed and five sets of the split rock tool 1 may be prepared, and the following steps may be performed in parallel.

-Insert the blade members 11 and 12 (illustration of the coupling mechanism 13 is omitted) into the first drilling hole 21a from the left in the front row,
-Insert the tip of the wedge member 14 between the blade members 11 and 12 inserted in the second drilling hole 21b from the left in the front row,
-For the third drilling hole 21c from the left in the front row, the rear end portion 14b of the wedge member 14 is struck by the piston of the breaker 3 (FIGS. 1 and 3) to press-fit the front end portion of the wedge member 14. Split rock,
The breaker 3 is removed from the rear end portion 14b of the wedge member 14 inserted into the fourth drilling hole 21d from the left in the front row,
The blade member 11 after the extraction tool 4 is set on the rear end portion 14b of the wedge member 14 inserted into the fifth drilling hole 21e from the left in the front row, and the wedge member 14 is extracted using the extraction tool 4. Collect 12
By performing these processes in parallel, the efficiency of the crushing process can be further increased.

  In addition, after inserting the blade members 11 and 12 into each of the plurality of drilling holes 21 provided in a row and inserting the tip of the wedge member 14 between the blade members 11 and 12, the wedges arranged in a row The operation of inserting the rear end portion 14b of the wedge member 14 into the front end portion 311 of the cylinder portion 31 while moving the breaker 3 sequentially from the wedge member 14 at one end of the member 14 toward the other end side. A wide range of crushing operations may be performed by performing an operation of striking the wedge member 14 and an operation of removing the front end portion 311 of the cylinder portion 31 from the rear end portion 14b of the wedge member 14.

  Moreover, in the said embodiment, this invention is applied to the technique which uses the split rock tool 1 containing the two blade members 11 and 12 and breaks and crushes the process target objects 2, such as a rock, a rock, and a concrete structure. However, the number of blade members is not limited to “2”, and the same applies to the case of 3 or more. In addition, the configuration of the blade member is also arbitrary, and a technique of pressing each blade member against the inner wall of the drilling hole by press-fitting the tip of the wedge member between the plurality of blade members, for example, Japanese Patent No. 4951574, This can also be applied to Japanese Patent No. 5033401. Further, it is not essential to connect the plurality of blade members to each other by the connecting mechanism 13.

  Further, in the above embodiment, the front end surface 331 of the impact transmitting member 33 is finished to be a curved concave surface corresponding to the rear end surface 14e of the wedge member 14 being formed to be a curved convex surface, but even if the surface shape is reversed. Good. That is, the rear end surface 14e of the wedge member 14 and the front end surface 331 of the impact transmission member 33 may be formed as a curved concave surface and a curved convex surface, respectively. Further, it is not essential that the curved concave surface and the curved convex surface have the same curvature radius, but in order to make the rear end surface 14e of the wedge member 14 and the front end surface 331 of the impact transmitting member 33 slide, the curvature radius of the curved concave surface is obtained. Must be set to be equal to or greater than the absolute value of the radius of curvature of the curved convex surface.

  As described above, in the above embodiment, the (−Y) direction corresponds to the “radially outer side of the drilling hole” of the present invention for the blade member 11, and the (+ Y) direction of the blade member 12 corresponds to the “cutting direction” of the present invention. This corresponds to “the radially outer side of the hole”. The (+ X) direction and the (−X) direction correspond to the “front-rear direction” of the present invention.

  In the present invention, a plurality of blade members are inserted into a drilling hole formed in a processing object such as a rock mass, a rock, or a concrete structure, and a tip portion of a wedge member having a tapered shape is provided between the blade members. By press-fitting, the blade member can be pressed against the inner wall of the drilling hole, and can be applied to all techniques for splitting rocks.

DESCRIPTION OF SYMBOLS 1 ... Split rock tool 2 ... Processing object 3 ... Breaker 11, 12 ... Blade | wing member 11b, 12b ... Press part 14 ... Wedge member 14a ... (Wedge member) inclined surface 14b ... (Wedge member) rear end part 14e ... ( Rear end surface of wedge member 31 ... Cylinder portion 32 ... Piston 33 ... Heat transmission member 34 ... O-ring (seal member)
311 ... Tip portion of cylinder portion 321 ... Tip surface of piston 331 ... Tip surface of hammering transmission member 332 ... Rear end surface of hammering transmission member 21, 21a to 21e ... Drilling hole SP ... Insertion space X ... Drilling direction

Claims (4)

The wedge member is hit by striking a rear end portion of a wedge member having a tapered tip portion and press-fitting the front end portion of the wedge member between a plurality of blade members inserted into a hole to be processed. While sliding a plurality of blade members relative to the inclined surface formed at the tip of the hole, the blade is moved radially outward of the hole to press the inner wall of the hole, and around the hole. A breaker to crush,
A cylinder portion in which an insertion space into which a rear end portion of the wedge member can be loosely inserted is provided at a tip portion;
A piston that reciprocates in the front-rear direction inside the cylinder portion;
Inside the cylinder portion, the piston is disposed between the piston and the insertion space, and the rear end surface receives the impact by the piston while the front end surface is in contact with the rear end surface of the wedge member loosely inserted into the insertion space. A striking transmission member that transmits striking by the piston to the wedge member,
One of the front end surface of the hit transmission member and the rear end surface of the wedge member has a curved concave surface and the other has a curved convex surface, and the front end surface of the hit transmission member and the rear end surface of the wedge member are in sliding contact with each other. Breaker characterized by being possible. The breaker according to claim 1,
A breaker further comprising a seal member interposed between a rear end portion of the wedge member loosely inserted into the insertion space and a front end portion of the cylinder portion to block the insertion space from the front end side of the cylinder portion. The breaker according to claim 2,
The seal member is a breaker that is an O-ring provided around the insertion space. Inserting a plurality of blade members into a hole formed in the processing object;
Inserting a tapered tip of a wedge member between the plurality of blade members inserted into the hole,
4. The tip of the impact transmitting member is inserted by inserting the rear end of the wedge member, the tip of which is inserted between the plurality of blade members, into the insertion space of the breaker according to claim 1. A step of sliding a surface against the rear end surface of the wedge member;
The rear end portion of the wedge member is struck by the piston of the breaker through the hit transmission member while the front end surface of the hit transmission member and the rear end surface of the wedge member are in sliding contact with each other. A crushing method comprising the step of crushing.

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