JP2012130996A - Chamfering tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chamfering tool which can effectively use a blade body without any waste.SOLUTION: Two blade bodies 2 are made to cross each other to be fixed to a holder 4 by fixing screws 10. By moving a chamfering corner part 3 exposed from the holder 4, which is formed by making the two blade bodies 2 cross each other in an edge extending direction while making the corner part 3 be brought into pressure-contact with the edge of an object 12, the corner of the edge is chamfered. When the chamfering is hardly performed due to wear of the blade bodies 2, the blade bodies 2 are slid in a holding groove 9 in a longitudinal direction, thereby changing the position of the blade body 2 which becomes the chamfering corner part 3 to the other position of the blade body 2.

Description

  The present invention relates to a chamfering tool, and more particularly to a chamfering tool capable of effectively using a blade body without waste.

  When a metal plate or a resin plate is processed such as cutting or drilling, burrs are generated in the processed part. In order to perform such deburring and finishing, various tools have been proposed (see, for example, Patent Document 1). The deburring tool for a drilling hole described in Patent Document 1 has a blade body at the tip of a handle to be gripped, and removes burrs by sliding the blade body while being pressed against an object. When chamfering the cut surface, a tool in which a blade body having a shape suitable for chamfering is attached to the tip is used. However, with such a chamfering tool, by repeating the chamfering work, the portion of the blade that is pressed against the object is worn out and cannot be used. That is, even if a part of the blade is worn out, it is necessary to replace it with a new chamfering tool or to replace it with a new blade. Therefore, there is a problem that the blade portion is not sufficiently utilized.

Japanese Utility Model Publication No. 5-51529

  The objective of this invention is providing the chamfering tool which can use a blade body effectively without waste.

  In order to achieve the above object, a chamfering tool of the present invention comprises two blade bodies, a holder that holds the two blade bodies so as to be slidable in the longitudinal direction, and the two blade bodies as holders. And a fixing means for fixing, wherein a corner portion for chamfering formed by intersecting the two blade bodies is exposed from the holder.

  According to the present invention, the object can be chamfered by moving the chamfering corner exposed from the holder while being pressed against the object. And the position of the blade used as the chamfering corner part can be changed to another position of the blade by sliding the blade in the longitudinal direction. Therefore, the blade body can be used effectively without waste.

  Here, for example, the blade body is made of ceramics. According to this specification, corrosion of the blade body can be prevented and handling is also safe.

  It is also possible to adopt a specification in which the blade has a square cross section. According to this specification, since the four corners of the cross section of the blade body can be used as the chamfering corner portion, the blade body can be used more effectively.

  The angle of the corner portion for chamfering is, for example, 45 ° to 120 °. By making this angle range, it becomes easy to perform chamfering work smoothly.

  An inclination angle line that forms a predetermined angle with respect to the blade body in a side view can be set to a specification displayed on the side surface of the holder. According to this specification, when the chamfering operation is performed, the tilt angle of the blade body with respect to the object can be easily adjusted to a desired angle by tilting the holder with the tilt angle line as a guide. This is advantageous for performing a smooth chamfering operation.

It is a front view which illustrates the chamfering tool of this invention. It is an exploded view of the chamfering tool of FIG. It is a side view of the chamfering tool of FIG. It is a perspective view which illustrates the blade body which forms the corner part for chamfering. It is a cross section of a blade. It is a top view which illustrates the state which is doing chamfering work. It is a side view which illustrates the state which is doing chamfering work.

  Hereinafter, the chamfering tool of this invention is demonstrated based on embodiment shown in the figure.

  As illustrated in FIGS. 1 to 3, a chamfering tool 1 according to the present invention is a hand tool that can be chamfered by hand, and includes two long plate-like blade bodies 2 and two blades. A holder 4 for holding the body 2 in an intersecting manner and a fixing screw 10 for fixing the two blade bodies 2 held by the holder 4 to the holder 4 are provided.

  The holder 4 can hold the two blade bodies 2 so as to be slidable in the longitudinal direction. Among the corner portions formed by the intersection of the two blade bodies 2, the corner portion exposed from the holder 4 becomes the corner portion 3 for chamfering. That is, the portion of the blade 2 that is exposed from the notch 8 formed in the holder 4 and intersects is the chamfering corner 3. The angle A of the corner portion 3 for chamfering is set to about 45 ° to 120 °, for example.

  As illustrated in FIG. 2, the holder 4 is configured by stacking two plate-like bodies 5 and 6 made of resin and bonding them with an adhesive or the like. Each of the bodies 5 and 6 has the same shape (the same thing). These bodies 5 and 6 have a left-right asymmetric Y-shape having a protruding handle portion 7 and a triangular notch portion 8, and have two screw holes 10a.

  The notch 8 has a shape cut into an acute angle so that the chamfering corner 3 is exposed from the bodies 5 and 6. Each of the surfaces of these bodies 5 and 6 is provided with a holding groove 9 for holding one blade body 2 so as to be slidable. The holding groove 9 extends so as to open to the notch 8 in the middle of the longitudinal direction.

  The depth of the holding groove 9 provided in the bodies 5 and 6 is set to be equal to the thickness of the blade body 2 to be held or slightly shallower than the thickness of the blade body 2. These bodies 5 and 6 are made to face each other on the surface where the holding grooves 9 are formed, and the notch portions 8 and the screw holes 10a are aligned and overlapped with each other. Crossed.

  By inserting the blade body 2 into each holding groove 9 and tightening the fixing screw 10 that allows the screw holes 10a of the bodies 5 and 6 to communicate with each other, the two blade bodies 2 are sandwiched and pressed between the bodies 5 and 6. Fixed. That is, the fixing screw 10 serves as a fixing means for fixing the blade body 2 to the holder 4. By positioning the blade body 2 at an arbitrary position in the longitudinal direction in the holding groove 9 and tightening the fixing screw 10, the position of the blade body 2 that becomes the chamfering corner portion 3 can be changed.

  As illustrated in FIG. 3, an inclined angle line 11 is displayed on the side surface of the holder 4 and forms a predetermined angle B in the side view with respect to the blade body 2 fixed to the holder 4. An angle B formed by the inclined angle line 11 with respect to the blade body 2 is, for example, about 30 ° to 60 °.

  The two blade bodies 2 intersect to form a chamfering corner portion 3 as illustrated in FIG. 4A shows a corner portion 3 for chamfering when a blade body 2 having a square cross section is used as shown in FIG. 5A. FIG. 4B shows a corner portion 3 for chamfering when a blade body 2 having a semicircular cross section is used as shown in FIG.

  The blade body 2 may be made of various metals including ceramics, light metals such as aluminum and aluminum alloys. When the ceramic blade 2 is used, corrosion can be prevented and handling becomes safe.

  When chamfering is performed using the chamfering tool 1, the chamfering corner portion 3 is arranged so that the edge of the object 12 is sandwiched between the two blade bodies 2 as illustrated in FIG. 6. Then, as illustrated in FIG. 7, the holder 4 is kept at a predetermined inclination angle C, and the chamfering corner portion 3 is moved in a direction in which the edge extends while being pressed against the edge. Thereby, chamfered portions 13 are simultaneously formed at the corners on both sides of the edge.

  By repeating the chamfering operation, the chamfering corner portion 3 is worn and chamfering becomes difficult. In that case, after loosening the fixing bolt 10 and sliding each blade body 2 slightly, the fixing bolt 10 is tightened, and the two blade bodies 2 are fixed to the bodies 5 and 6 at this position. As a result, the chamfering corner portion 3 is changed to another position of the blade body 2, so that the chamfering operation can be performed in the same manner as the new blade body 2. When the chamfered corner portion 3 is worn out, the blade body 2 is similarly slid to set the new position of the blade body 2 to the chamfered corner portion 3. Therefore, according to the present invention, the blade body 2 can be used effectively without waste.

  If the cross section of the blade body 2 is a quadrangle as illustrated in FIG. 5A, even if the blade body 2 is gradually slid and one corner 2a is used as the chamfering corner portion 3, Other corners 2b, 2c, 2d can be used. If the cross section of the blade body 2 is semicircular as illustrated in FIG. 5B, the two corners 2 a and 2 b can be used as the chamfering corner portion 3. Therefore, the blade body 2 can be used more effectively when the blade body 2 having a quadrangular cross section that can use the four corners 2a, 2, 2c, and 2d as the chamfering corner portion 3 is used.

  If the angle A of the corner portion 3 for chamfering is set to about 45 ° to 120 °, the chamfering operation can be performed smoothly. This angle A is more preferably close to 90 °.

  Moreover, it becomes easy to perform a chamfering work when the inclination angle C in the side view of the blade body 2 is about 30 ° to 60 ° with respect to the edge to be chamfered. This angle C is more preferably close to 45 °. When the angle A is 90 ° and the angle C is 45 °, the chamfering operation can be performed very smoothly.

  In this embodiment, an inclined angle line 11 forming a predetermined angle B of 30 ° to 60 ° in a side view is displayed with respect to the blade body 2 fixed to the holder 4. Therefore, when the chamfering operation is performed, the tilt angle C in the side view of the blade body 2 with respect to the edge is set in advance by tilting the holder 4 so that the tilt angle line 11 is parallel to the edge with the inclination angle line 11 as a guide. It becomes easy to adjust to the set predetermined angle (30 ° to 60 °). This is advantageous for performing a smooth chamfering operation. For example, when the angle B is set to 45 °, the tilt angle C in the side view of the blade body 2 with respect to the edge is set to 45 by tilting the holder 4 so that the tilt angle line 11 is parallel to the edge of the object 12. Easy to adjust to °.

  When using a blade 2 made of light metal such as ceramic or aluminum, the material of the object 12 to be chamfered is mainly a synthetic resin, for example, polyethylene, polypropylene, polyethylene, nylon, polycarbonate, vinyl chloride, Such as acrylic.

  In this embodiment, since the holder 4 is formed by integrating two bodies 5 and 6 having the same shape, there is an advantage that only one type of mold for manufacturing the bodies 5 and 6 is required. The specifications (structure, shape, material, etc.) of the holder 4 are not limited to those exemplified in this embodiment. For example, the holder 4 can be formed by a single body, and the two holding grooves 9 can be formed to intersect the body. Then, the blade body 2 held in the holding groove 9 can be directly pressed by the fixing screw 10 or the like and fixed to the holder 4. The fixing means for fixing the blade body 2 to the holder 4 is not limited to the fixing screw 10.

DESCRIPTION OF SYMBOLS 1 Chamfering tool 2 Blade body 2a, 2b, 2c, 2d angle | corner 3 Chamfering corner part 4 Holder 5, 6 Body 7 Handle part 8 Notch part 9 Holding groove 10 Fixing screw 10a Screw hole 11 Inclination angle line 12 Target object 13 Chamfering Part

Claims (5)

  Two blades, a holder for holding the two blades so as to be slidable in the longitudinal direction, and a fixing means for fixing the two blades to the holder, the two blades A chamfering tool characterized in that a corner portion for chamfering formed by intersecting bodies is exposed from the holder.   The chamfering tool according to claim 1, wherein the blade body is made of ceramics.   The chamfering tool according to claim 1, wherein the blade has a quadrangular cross section.   The chamfering tool according to any one of claims 1 to 3, wherein an angle of the corner portion for chamfering is 45 ° to 120 °.   The chamfering tool according to any one of claims 1 to 4, wherein an inclination angle line that forms a predetermined angle with respect to the blade body in a side view is displayed on a side surface of the holder.

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