JP2011036952A - Projection cutting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a projection cutting device capable of cutting a projection provided on a surface of a structure to the approximately same flat surface as the surface. <P>SOLUTION: In the projection cutting device for cutting the projection 3 projectedly provided on the surface of the structure 5 along the surface of the structure 5, a saw blade housing 13 rotatably including a band saw blade 25 is included on a support frame 7 capable of being fixed to the surface of the structure 5 so as to become movable along the surface of the structure 5, and a saw blade guide member 33 for guiding/supporting an inner peripheral surface of a body part of the band saw blade 25 is included at both sides of the projection 3. A back part support member 35 for supporting a back part of the band saw blade is included at a position close to the band saw guide member 33 so as to be contacted with the surface of the structure 5. The back part support member 35 is movable included in a direction approaching/leaving relative to the surface of the structure 5 and is included so as to be urged to the surface side. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a projection cutting device for cutting a projection such as a suspension piece attached to a large structural steel plate by welding, and more specifically, the projection along the surface of the structure. The present invention relates to a projection cutting device that can cut a projection with substantially the same surface as the above surface.

  2. Description of the Related Art Conventionally, in order to suspend and transport a structure such as a large structural steel plate used for shipbuilding and bridges with a crane, a suspension piece is integrally attached to the surface of the structure by welding. The suspension piece is removed by gas cutting or the like after the structure is conveyed and positioned at a desired position. When gas-cutting a hanging piece, the thermal influence on the structure is large, and post-processing is troublesome, and therefore it has been proposed to cut the hanging piece with a band saw blade (see Patent Documents 1 and 2).

Japanese Utility Model Publication No. 6-63227 JP 2004-345044 A

  In the configuration described in Patent Document 1, since the hanging piece is cut by a band saw blade, the thermal effect can be suppressed, but a slight protrusion remains after the hanging piece is cut. This requires post-processing such as cutting with a grinder or a cutter (see [0034]).

  In the configuration described in Patent Document 2 as well, since the suspension piece is cut by the band saw blade, the band saw blade is guided by being engaged with the engagement groove of the saw blade insert, although the heat influence is small. Therefore, a slight protrusion equal to the thickness dimension of one side of the engagement groove in the saw blade insert remains, and there is a problem that a post-treatment is necessary to remove the slight protrusion. .

  The present invention has been made in view of the conventional problems as described above, and is a projection cutting device for cutting a projection provided on the surface of a structure along the surface of the structure. A saw blade housing rotatably provided with a band saw blade on a support frame that can be fixed to the surface of the structure, and is movable along the surface of the structure. A saw blade guide member for guiding and supporting the inner peripheral surface of the body portion of the band saw blade is provided, and a back support member for supporting the back portion of the band saw blade is brought into contact with the surface of the structure at a position close to the saw blade guide member. It is provided as a feature.

  Further, in the projection cutting device, the back support member is provided so as to be movable in a direction approaching and separating from the surface of the structure, and biased toward the surface side. It is what.

  According to the present invention, the back support member that supports the back portion of the band saw blade is provided in contact with the surface of the structure, and the suspension piece or the like can be used with the outer peripheral surface of the band saw blade in contact with the surface of the structure. When cutting the projection, the band saw blade can be supported between the back support member and the surface of the structure, and the back of the band saw blade can be supported. That is, the suspension piece can be cut in a state where the outer peripheral surface of the band saw blade is in contact with the surface of the structure, and the protrusion can be cut in substantially the same plane as the surface of the structure.

It is front explanatory drawing which showed notionally and roughly the protrusion cutting device which concerns on embodiment of this invention. It is sectional explanatory drawing of the principal part. It is explanatory drawing which shows the other form of the principal part.

  As conceptually and schematically shown in FIG. 1, the projection cutting device 1 according to the embodiment of the present invention has a projection 3 such as a suspension piece, for example, in the same manner as the configuration described in Patent Document 1 above. A support frame 7 that can be fixed to the surface of the structure 5 provided on the surface is provided. The support frame 7 has a frame structure and is configured to be long in the front-rear direction (the direction perpendicular to the paper surface in FIG. 1). A leg portion 9 that can be fixed to the surface of the structure 5 via the fixing means is provided.

  A guide member 11 in the front-rear direction is provided on the support frame 7, and a saw blade housing 13 is supported on the guide member 11 so as to be movable back and forth. More specifically, the saw blade housing 13 is provided with a beam member 15 that is long in the left-right direction, and wheel housings 17 and 19 are provided on both the left and right sides of the beam member 15. A drive wheel 21 rotated by a motor (not shown) is rotatably provided in the one wheel housing 17, and a driven wheel 23 is rotatably provided in the other wheel housing 19. An endless band saw blade 25 is wound around the drive wheel 21 and the driven wheel 23.

  In order to support the saw blade housing 13 movably back and forth along the guide member 11, a front and rear slider 27 supported by the guide member 11 so as to move back and forth is integrally attached to the saw blade housing 13. is there. Further, the support frame 7 is provided with a longitudinal movement means 29 for moving the saw blade housing 13 back and forth. As the above-mentioned back-and-forth movement means 29, for example, the saw blade housing 13 is moved back and forth using a reciprocating device such as a hydraulic cylinder, or as shown in Patent Documents 1 and 2, a ball screw mechanism or a rack and pinion An appropriate configuration such as a mechanism can be employed.

  The band saw blade 25 is guided by a saw blade guide mechanism 31 provided in each of the wheel housings 17 and 19 so as to cut the projection 3 in substantially the same plane as the surface of the structure 5. More specifically, the saw blade guide mechanism 31 provided in the wheel housings 17 and 19 includes a saw that guides and supports the inner peripheral surface of the body portion 25A of the band saw blade 25 at a position close to the surface of the structure 5. A blade guide 33 (see FIG. 2) as a blade guide member is provided.

  In other words, the blade guide 33 guides and supports only the inner peripheral surface of the body portion 25A of the band saw blade 25, and the outer peripheral surface of the body portion 25A is open without being guided. And the tooth | gear part 25B in the said band saw blade 25 exists in the state which protruded from the said blade guide 33 to the direction of the protrusion 3 (front direction: right direction in FIG. 2), and the back part 25C of the band saw blade 25 is the said blade guide 33. Is supported by a back support member 35 provided in the wheel housings 17 and 19. This back support member 35 is always urged in a protruding direction by an elastic member 37 such as a coil spring, for example, so that when the projection 3 is cut by the band saw blade 25, the back support member 35 is placed on the surface of the structure 5. It is held in contact with it so that it can move.

  The blade guide 33 can cut the projection 3 on the surface of the structure 5 substantially in the same plane when the projection 3 such as a suspended piece is cut along the surface of the structure 5 by the band saw blade 25. As described above, the wheel housings 17 and 19 are provided in advance.

  In the configuration as described above, in order to cut the protrusion 3 provided on the surface of the structure 5, the support 5 is supported on the surface of the structure 5 so that the protrusion 3 is located in the region of the support frame 7. Install the frame 7. Thereafter, when the drive wheel 21 is rotated to rotate the band saw blade 25 and the saw blade housing 13 is moved forward along the surface of the structure 5 by the back and forth movement means 29, the band saw blade 25 cuts the projection 3. Will do.

  As described above, when the projection 3 is cut by the band saw blade 25, the band saw blade 25 is cut by the blade guide 33 so as to cut the projection 3 in substantially the same plane as the surface of the structure 5. The back surface of the band saw blade 25 is guided by a back support member 35 that is pressed and urged by an elastic member 37 so that the tip of the band saw blade 25 always contacts the surface of the structure 5. Since it is supported, the distance between the wheel housings 17, 19 and the surface of the structure 5 changes due to the vibration of the band saw blade 25 during the cutting action and the unevenness of the surface of the structure 5 around the protrusion 3. Even in such a case, the band saw blade 25 can be prevented from entering between the back support member 35 and the surface of the structure 5, and the projection 3 can be cut efficiently. That.

  As already understood, when the protrusion 3 is cut, it can be cut in substantially the same plane as the surface of the structure 5, so that no post-treatment is necessary to remove a slight protrusion, as described above. The conventional problem can be solved.

  By the way, the present invention is not limited to the above-described embodiments, and can be implemented in other forms by making appropriate changes. For example, as shown in FIG. 3, a support block 39 integrally provided with a blade guide 33 and a back support member 35 is provided on the wheel housings 17 and 19 so as to be movable up and down, and the support block 39 is provided by an elastic member 37. It is also possible to adopt a configuration that urges the structure 5 in the direction. With the above configuration, the same effects as those of the above-described embodiment can be obtained, and the followability to slight surface waviness or the like in the structure 5 is improved.

  Further, as indicated by an imaginary line in FIG. 1, the beam member 15 is provided with a guide arm 41 similar to a saw blade guide arm in a general horizontal band saw so that the position can be adjusted in the left-right direction. It is also possible to employ a configuration in which the saw blade guide mechanism 31 is provided at the portion (tip portion). With the above configuration, when the projection 3 is cut by the band saw blade 25, the length of the band saw blade 25 contacting the surface of the structure 5 can be shortened.

  That is, when the projection 3 is cut by the band saw blade 25, the area that damages the surface of the structure 5 can be reduced. Therefore, the surface treatment area such as painting after cutting the projection 3 is reduced, and the surface treatment as the post treatment is facilitated.

DESCRIPTION OF SYMBOLS 1 Projection cutting device 3 Projection 5 Structure 7 Support frame 13 Saw blade housing 15 Beam member 17, 19 Wheel housing 25 Band saw blade 29 Back-and-forth movement means 31 Saw blade guide mechanism 33 Blade guide (saw blade guide member)
35 Back support member 30 Support block

Claims (2)

  A projection cutting device for cutting a projection provided on a surface of a structure along the surface of the structure, wherein the band saw blade is attached to a support frame that can be fixed to the surface of the structure. A saw blade housing member rotatably provided along the surface of the structure, and a saw blade guide member for guiding and supporting the inner peripheral surface of the body portion of the band saw blade on both sides of the projection. A projection cutting device comprising: a back support member that supports the back portion of the band saw blade at a position close to the saw blade guide member in contact with the surface of the structure.   The projection cutting device according to claim 1, wherein the back support member is provided so as to be movable in a direction approaching and moving away from the surface of the structure, and is urged toward the surface side. A projection cutting device characterized by that.

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