JP2010024798A - Trimming apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a trimming apparatus of high efficiency in trimming a wall surface in a planar state. <P>SOLUTION: A plurality of chisels 50 are supported in a straight line in a direction orthogonal to an axis direction while breaking surfaces 52 are located almost in the same plane, and impact is applied in the axis direction to the plurality of thus supported chisels 50 to carry out separation work. Since the separation work is carried out to the wall surface with the breaking surfaces 52, located almost in the same plane, of the plurality of chisels 50, the wall surface is separated in the planar state with the breaking surfaces 52 of the plurality of chisels 50. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an edge cutting device that performs an edge cutting operation on an inner wall surface of a tunnel, and in particular, performs an edge cutting operation by applying an impact in the axial direction to a chisel whose blade edge is in contact with a wall surface of a tunnel or the like. The present invention relates to an edge cutting device.

  Currently, in the construction of underground spaces such as tunnels, edge cutting work is sometimes performed to finish the inner wall surface after blasting or excavating with an excavating machine into a predetermined shape. As an apparatus for performing the edge cutting operation, as shown in FIG. 5, an apparatus in which a hydraulic breaker mechanism is mounted at the tip of a boom of a work cart has been proposed.

  In this conventional apparatus, a pivot mechanism around the horizontal axis in the width direction of the work carriage, a turning mechanism around the horizontal axis (in the traveling direction) perpendicular to it, and a chisel axis of the breaker mechanism are attached to the tip of the boom of the work carriage. A hydraulic breaker mechanism is mounted via a feed mechanism.

  By these driving means, the hydraulic breaker mechanism positions the chisel so as to protrude in the normal direction with respect to the excavation surface of the inner wall of the tunnel, and operates the breaker mechanism to penetrate the chisel into the excavation surface and crush it.

As shown in FIG. 6, the chisel mounted on the breaker mechanism is composed of a shank portion that is slidably fitted into the breaker mechanism main body, a tip edge portion, and an intermediate rod portion. A moy point (FIG. 6 (a)) or a wedge point (FIG. 6 (b)) whose shape is suitable for penetration into the rock is used (see Patent Documents 1 and 2).
Japanese Utility Model Publication No. 62-99698 Registered Utility Model Publication No. 3001131

  However, in the conventional apparatus, since the chisel is positioned in the normal direction with respect to the excavation surface and excavated, the penetration depth tends to vary, and unevenness remains on the construction surface. If irregularities remain on the construction surface, a large amount of concrete is required in the next step of spraying concrete, which is a problem. This roughening of the finished surface can be overcome by carrying out the work finely and delicately at the crushing (penetration) portion, but the work efficiency is thereby reduced.

  Therefore, if the excavation surface is crushed by holding the conventional device horizontally (or with a slight angle) so as to face the face, the rock crack (break line) that occurs when the chisel penetrates Since the advancing direction cannot be controlled, it is difficult to make the construction surface coincide with the predetermined finish surface. Therefore, the crushing in the horizontal direction is the same as the crushing in the normal direction as described above, or more than that, it is necessary to work the crushing portion densely and delicately, and the work efficiency is low.

  Moreover, in the conventional edge cutting device, the wall surface is excavated in a dot shape by a chisel. For this reason, in the case where a wide range of wall surfaces are trimmed in a planar shape, the wall surface is formed in a planar shape by repeatedly performing spot excavation with a chisel, which is complicated and low in efficiency.

  If a chisel with a wedge point as shown in FIG. 6 (b) is used, the direction of cracks in the rock mass that occurs when the chisel penetrates is relatively easy to control. However, it is difficult to maintain the initial performance. Therefore, there is a problem that the running cost increases because the chisel needs to be frequently replaced.

  The present invention has been made in view of the above-described problems, and provides an edge cutting device with good efficiency for edge cutting of a wall surface in a flat shape.

  An edge cutting device according to the present invention is an edge cutting device that performs an edge cutting operation by applying an impact in the axial direction to a chisel with a blade edge abutting against a wall surface of a tunnel or the like. A plurality of chisels whose crushing surfaces are formed in a planar shape, and a support mechanism that linearly supports the plurality of chisels in a direction perpendicular to the axial direction while the crushing surfaces are located on substantially the same surface.

  In the edge cutting device of the present invention, a plurality of chisels are supported by a support mechanism linearly in a direction orthogonal to the axial direction in a state where the crushing surfaces are located on substantially the same plane, and the plurality of chisels supported in this way are supported. An impact is applied in the axial direction to perform the edge cutting operation. For this reason, the edge cutting operation is performed on the wall surface at the crushing surfaces of the plurality of chiseles located on substantially the same plane.

  Further, in the edge cutting device as described above, the chisel has three crushing surfaces formed on the triangular pyramid-shaped cutting edge, and the support mechanism is in a state where one of the three crushing surfaces is positioned on the substantially same surface. Multiple chisels may be supported.

  In addition, the edge cutting device as described above may further include a plurality of breaker mechanisms that individually apply an impact to each of the plurality of chisels supported linearly.

  Moreover, in the edge cutting device as described above, the chisel may have a blade edge portion and a rod portion on which the blade edge portion is detachably attached to the tip.

  The various components of the present invention do not necessarily have to be independent of each other. A plurality of components are formed as a single member, and a single component is formed of a plurality of members. It may be that a certain component is a part of another component, a part of a certain component overlaps with a part of another component, or the like.

  In the edge cutting device of the present invention, a plurality of chisels are supported by a support mechanism linearly in a direction orthogonal to the axial direction in a state where the crushing surfaces are located on substantially the same plane, and the plurality of chisels supported in this way are supported. An impact is applied in the axial direction, and the edge cutting operation is executed. For this reason, since the edge cutting operation is performed on the wall surface by the crushing surfaces of the plurality of chiseles located on substantially the same plane, the wall surface is edge-cut by the plurality of chisel crushing surfaces in a planar shape.

  An embodiment of the present invention will be described below with reference to FIGS. However, the same portions as those of the conventional example described above with respect to the present embodiment are denoted by the same names, and detailed description thereof is omitted.

  The edge cutting device 10 according to the present embodiment performs an edge cutting operation by applying an impact in the axial direction to the chisel 50 in which the blade edge portion 51 is brought into contact with a wall surface such as a tunnel. As shown in FIGS. 1 to 4, the edge cutting device 10 includes a plurality of chiseles 50 in which at least one crushing surface 52 is formed in a flat shape on the blade edge portion 51, and a crushing surface, which will be described in detail later. A support mechanism that linearly supports the plurality of chisels 50 in a direction perpendicular to the axial center direction in a state where 52 is positioned on substantially the same plane, and an impact is individually applied to each of the plurality of chisels 50 that are linearly supported. And a plurality of breaker mechanisms 40 to be operated.

  As shown in FIG. 1, the chisel 50 has three crushing surfaces 52 formed on a triangular pyramid-shaped cutting edge portion 51, and the support mechanism is in a state where one of the three crushing surfaces 52 is positioned on substantially the same surface. A plurality of chiseles 50 are supported.

  As shown in FIGS. 2 and 3, the chisel 50 according to the present embodiment includes a blade edge portion 51 and a rod portion 53 to which the blade edge portion 51 is detachably attached to the tip.

  More specifically, the edge cutting device 10 includes a carriage 20 guided by the guide shell 8 and moved forward and backward by the feed mechanism 9, and 3 in the width direction (perpendicular to the traveling direction) via the bracket 30 on the carriage 20. The breaker mechanism 40 is mounted so as to be connected in series. The breaker mechanism 40 is provided with a known striking mechanism, and transmits impact energy to a chisel 50 described later by moving a built-in striking piston (not shown) back and forth at high speed.

  Each breaker mechanism 40 is provided with a chisel 50. The chisel 50 includes a cutting edge portion 51 and a rod portion 53, and the cutting edge portion 51 can be attached to and detached from the rod portion 53. A shank portion (not shown) is provided at the rear end (base end) portion of the rod portion 53, and this shank portion is slidably fitted into the distal end portion of the breaker mechanism 40.

  The blade edge portion 51 is formed in a triangular pyramid shape, and the three inclined surfaces are crushing surfaces 52. When the blade edge portion 51 is viewed from the face (surface to be crushed) side, the extended lines of the adjacent crushing surfaces 52 are arranged so as to be substantially linear, as indicated by (▽ ▽ ▽).

  At the tip of the guide shell 8 is provided a centizer 60 that guides and holds the rod portion 53 so as to be able to move forward and backward. The centralizer 60 includes a bracket 61, a bush 62, and a bush retainer 63, and the bush 62 and the bush retainer 63 are provided in triplicate corresponding to the rod portion 53.

  That is, the above-described breaker mechanism 40, the bracket 30, and the like form a support mechanism that linearly supports the plurality of chisels 50 in a direction perpendicular to the axial direction with the crushing surface 52 positioned substantially on the same plane. .

  The edge cutting device 10 as described above is mounted on, for example, a scaling jumbo 1 that is a wall surface excavator as shown in FIG. This scaling jumbo 1 is provided with a boom 6 that can be raised and lowered on a cart 2 that can be driven by the driving force of a wheel 3, and a guide shell 8 is mounted on the tip of the boom 6 via a guide mounting 7. .

  The guide mounting 7 supports the guide shell 8 so as to be able to move forward and backward, tilt, and turn. The carriage 2 is provided with an operator cabin 4 that the operator gets on and operates, and a soil removal board 5 for eliminating excavation gaps and the like. The guide shell 8 is provided with an edge cutting device 10 that can be moved forward and backward by a feed mechanism 9.

  In the configuration as described above, in the edge cutting device 10 of the present embodiment, the plurality of chiseles 50 are supported by the support mechanism linearly in the direction orthogonal to the axial direction with the crushing surface 52 positioned substantially on the same plane. Then, an impact is applied in the axial direction to the plurality of chisels 50 supported in this manner, and the edge cutting operation is executed.

  For this reason, since the chamfering operation is performed on the wall surface by the crushing surfaces 52 of the plurality of chiseles 50 located substantially on the same surface, the wall surface is chamfered in a planar shape by the crushing surfaces 52 of the plurality of chiseles 50. Become.

  More specifically, a case where the edge cutting operation is performed using the edge cutting apparatus 10 will be described below. First, the cart 2, the boom 6, and the guide mounting 7 are driven, and the chisel 50 is positioned at a predetermined position / posture toward a face having a cored hole formed in advance.

  Next, the carriage 20 is advanced by the feed mechanism 9 to press the blade edge 51 of the chisel 50 against the face. Then, the breaker mechanism 40 is driven while continuously applying a forward thrust by the feed mechanism 9 so that the blade edge portion 51 of the chisel 50 penetrates into the face.

  When the blade edge portion 51 penetrates into the face, a crack progresses from the apex angle of the crushing surface 52, and adjacent cracks extending along the continuous surface are combined to form one continuous break line, and this continuous break line Becomes the edge cut surface.

  At this time, the penetration resistance of the edge cutting device 10 is distributed to the three chisels 50, and cracks also progress from the apex of the pyramid corresponding to the diagonal of the crushing surface 52 forming the continuous line to the core hole, so the penetration resistance Furthermore, since the cutting edge is stronger than the wedge point, wear of the cutting edge is small. Therefore, it is easy to make the edge cut surface coincide with a predetermined finished surface, and since the wear of the cutting edge is small, the running cost can be suppressed.

  When this edge cutting operation is repeated, the wear of the cutting edge portion 51 proceeds even slightly, and the triangular pyramid shape collapses and the crushing surface 52 cannot be maintained. When the crushing surface 52 is eliminated, it is difficult to form a good edge cutting surface even if the cutting edge portion 51 is inserted into the face, so that it is necessary to replace the cutting edge portion 51.

  However, in the edge cutting device 10 of the present invention, the chisel 50 is constituted by the blade edge portion 51 and the rod portion 53, and the blade edge portion 51 is detachably provided from the rod portion 53. Therefore, when the blade edge portion 51 is worn, the edge portion Since only 51 can be exchanged, the running cost can be reduced.

  The present invention is not limited to the present embodiment, and various modifications are allowed without departing from the scope of the present invention. For example, in the said form, it illustrated that the chisel 50 and the breaker mechanism 40 were formed in triple. However, of course, the chisel 50 and the breaker mechanism 40 may be formed in two or four or more.

  Further, in the above embodiment, the triple chisel 50 is individually driven by the triple breaker mechanism 40. However, it is not impossible to drive a plurality of chiseles 50 with a single breaker mechanism.

  Needless to say, the above-described embodiment and a plurality of modifications can be combined within a range in which the contents do not conflict with each other. Further, in the above-described embodiments and modifications, the structure of each part has been specifically described, but the structure and the like can be changed in various ways within a range that satisfies the present invention.

It is a front view which shows the edge cutting device of embodiment of this invention. It is a side view which shows an edge cutting device. It is a top view which shows an edge cutting device. It is a side view which shows the scaling jumbo which is a wall surface drilling apparatus equipped with the edge cutting device. It is a schematic diagram which shows the operating state of the scaling jumbo which is the conventional wall surface drilling apparatus. It is a top view which shows the conventional chisel.

Explanation of symbols

1 Scaling Jumbo 2 Carriage 3 Wheel 4 Operator Cabin 5 Earth Removal Plate 6 Boom 7 Guide Mounting 8 Guide Shell 9 Feed Mechanism 10 Edge Cutting Device 20 Carriage 30 Bracket 40 Breaker Mechanism 50 Chisel 51 Cutting Edge 52 Crushing Surface 53 Rod 60 cent Riser 61 Bracket 62 Bush 63 Bush retainer

Claims (4)

An edge cutting device that performs an edge cutting operation by applying an impact in the axial direction to a chisel whose blade edge is in contact with a wall surface of a tunnel or the like,
A plurality of the chiseles in which at least one crushing surface is formed in a planar shape at the blade edge portion;
A support mechanism that linearly supports the plurality of chisels in a direction perpendicular to the axial direction in a state where the crushing surfaces are located on substantially the same plane;
A edging device. The chisel has three crushing surfaces formed on the triangular pyramid-shaped cutting edge,
2. The edge cutting device according to claim 1, wherein the support mechanism supports the plurality of chisels in a state in which one of the three crushing surfaces is positioned on substantially the same surface.   The edge cutting device according to claim 1 or 2, further comprising a plurality of breaker mechanisms for individually applying an impact to each of the plurality of chisels supported linearly.   The edge cutting device according to any one of claims 1 to 3, wherein the chisel includes the blade edge portion and a rod portion on which the blade edge portion is detachably attached to a tip end.

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