JP2015083029A - Hand-held tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hand-held tool capable of cutting the corner part of a plate precisely and easily at a desired position.SOLUTION: Lever members 1 and 2 are turnably born by a shank 3. On one side of the shank 3, there extend the holding parts 4 and 5 which can be gripped by one hand, and a cutting part 6 is formed on the other side from the shank 3. A cutting blade 7 is fixed at the leading end of the lever member 1 in the cutting part 6, and a cutting blade 9 is disposed at a position to engage with the cutting blade 7 in the cutting part 6. Stoppers 10a and 10b depend from the two sides of the cutting blade 7.

Description

  The present invention relates to a hand-held tool for cutting off a corner portion of a plate material into a desired shape.

In the sheet metal processing, for the purpose of preventing a laceration accident due to a corner portion of a sheet material, the corner portion may be rounded into a triangle, or may be rounded into a rounded shape. In forming these corners of the plate material, in order to form the desired shape, the plate material must be placed at a predetermined position and cut or pressed. For this reason, there is a problem that much labor is required and the equipment cost for installing the cutting machine and the press machine increases. If an NC corner shear (for example, Patent Document 1) is used, the working efficiency can be increased, but the equipment cost is further increased.
For this reason, as a simple method, the corner is cut off by a hand-held tool provided with a cutting blade, or the corner is shaved with a grinder and rounded with an R. However, with these methods, it has been difficult to accurately form a desired shape.

JP-A-5-337728

  The present invention has been made in view of the above-described conventional situation, and an object thereof is to provide a hand-held tool capable of accurately and easily cutting a corner portion of a plate material at a desired position.

  A hand-held tool according to a first aspect of the present invention is a hand-held tool for cutting a corner portion of a plate material, and includes a shaft portion that pivotally supports an appropriate position in an intermediate portion between two housings, and the shaft portion. A gripping portion of the housing on one side of the housing and a cutting portion of the housing on the other side of the shaft portion, and the cutting portions are connected to each other by rotation about the shaft portion of the housing. A first cutting blade and a second cutting blade to be mated, a first abutting portion that abuts one side of the plate material corner in a state in which the first cutting blade and the second cutting blade are not meshed, A second contact portion that contacts the other side of the corner portion of the plate material, and a guide means for guiding the corner portion of the plate material to protrude by a predetermined length from between the two cutting blades. Yes.

In this hand-held tool, when both the casings of the gripping part are spread by hand, the casing is rotated about the shaft part, and the space between the first cutting blade and the second cutting blade of the cutting part is widened. In this state, one side surface of the corner portion of the plate material is brought into contact with the first contact portion, and the other side surface of the plate material corner portion is brought into contact with the second contact portion so that the gap between the two cutting blades is obtained. The corner portion of the plate material is protruded by a predetermined length. Then, by grasping both the casings of the gripping part with the hand, the first cutting blade and the second cutting blade are engaged, and the corner portion of the plate member protruding at a predetermined length from between the two cutting blades is cut. .
Therefore, according to this hand-held tool, the corner portion of the plate material can be cut accurately and easily at a desired position.

In the second aspect of the present invention, the first abutting portion has a first abutting surface that abuts one side of the plate material corner, and the second abutting portion includes the other side of the plate material corner. It has a second abutting surface that abuts, and the both abutting surfaces guide the corner of the plate so that the corner of the plate protrudes between the two cutting blades into an isosceles triangle shape. .
If this is the case, it is in a state where both the casings of the gripping part are spread with one hand, have a plate material to be cut with the other hand, and contact one side of the plate material corner with the first contact surface, If the grip portion is gripped while the other side is in contact with the second contact surface, the first cutting blade and the second cutting blade are engaged at a predetermined position, and the corner of the plate material is easily formed in an isosceles triangle shape. Can be cut into pieces.

  In the third aspect of the present invention, in the invention of the second aspect of the present invention, the angle formed by the first contact surface and the second contact surface is a right angle. In this case, when the corner of the plate is a right angle, the right angle of the plate can be easily cut into a right isosceles triangle shape.

In the fourth aspect of the present invention, the guide member is disengaged from the contact when both sides of the right-angled corner of the plate are brought into contact with the first contact surface and the second contact surface. It was decided that a cover was provided to prevent this.
In this case, it is possible to prevent the plate material from being displaced from a predetermined position during cutting and being cut at a position other than the predetermined position.

In the fifth aspect of the present invention, the first cutting blade and the second cutting blade are capable of cutting a corner portion of the plate material linearly.
If it is like this, since the right-angle corner | angular part of the board | plate material which protruded in the shape of an isosceles triangle from between both cutting blades is cut | disconnected linearly, the cornering which cuts off a corner | angular part into a triangle can be performed easily.

In the sixth aspect of the present invention, the first cutting blade and the second cutting blade are capable of cutting a corner portion of the plate material into an arc shape.
If this is the case, the right-angled corners of the plate material protruding in an isosceles triangle shape from between the two cutting blades are cut into an arc shape, so that the corners are rounded and rounded with a rounded shape. Can do.

It is a perspective view of the hand-held tool of Example 1. FIG. It is a perspective view at the time of setting the steel plate which is going to cut to the hand-held tool of Example 1. FIG. It is a perspective view of the modification of the hand-held tool of Example 1. FIG. It is a perspective view of the hand-held tool of Example 2. It is a perspective view at the time of setting the steel plate which is going to cut to the hand-held tool of Example 2. FIG. It is a perspective view of the 1st modification of the hand-held tool of Example 2. FIG. It is a perspective view of the 2nd modification of the hand-held tool of Example 2. FIG. It is a perspective view of the hand-held tool of Example 3.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below with reference to the drawings.
Example 1
The hand-held tool of Example 1 is for chamfering the corners of a steel plate, and as shown in FIG. 1, two casings 1 and 2 are pivotally supported by a shaft portion 3. Yes. In the two casings 1 and 2, gripping portions 4 and 5 that can be grasped with one hand extend from the shaft portion 3 on one side, and the other side from the shaft portion 3 is a cutting portion 6. ing. A cutting blade 7 made of high-speed steel is screwed to the tip of the housing 1 in the cutting portion 6 so as to be replaceable. A base 8 is fixed to the tip of the housing 2 in the cutting portion 6 by welding, and the base 8 is screwed so that a cutting blade 9 made of high-speed steel can be replaced with a position where the cutting blade 7 meshes. It has been stopped. Cylindrical stoppers 10 a and 10 b are suspended from the base 8 on both sides close to the cutting edge of the cutting blade 9. The tips of the stoppers 10 a and 10 b are positioned higher than the cutting blade 9. The stoppers 10a and 10b are guide means.

Next, a method for using the handheld tool according to the first embodiment will be described.
The user first holds the gripping portions 4 and 5 of the hand-held tool with one hand, and spreads the gripping portions 4 and 5 away from each other. As a result, the cutting blades 7 and 9 are not engaged with each other. Then, one end of the corner of the steel plate 11 to be cut with the other hand is pressed against the stopper 10a and the other side is pressed against the stopper 10b, and the tip of the corner of the steel plate 11 is cut with the cutting blades 7 and 9. Is inserted deeper than the position of the blade edge (see FIG. 2). And holding the holding | grip parts 4 and 5 hold | maintaining this state, the cutting blades 7 and 9 will mesh | engage and the corner | angular part front-end | tip of the steel plate 11 will be cut | disconnected in triangular shape.
It should be noted that a male screw is provided at the lower end of the stoppers 10a and 10b, and a female screw to be engaged with the male screw part of the stoppers 10a and 10b is provided at a plurality of locations on the base 8, so that the position where the stoppers 10a and 10b are erected can be changed. It is also preferable to keep it. If it is like this, since the length which the corner | angular part of the steel plate 11 protrudes from the cutting blades 7 and 8 can be adjusted, the magnitude | size of the triangular piece cut | disconnected in a chamfering can be changed.

  As described above, with the hand-held tool according to the first embodiment, the cornering of the steel plate 11 to be cut can be easily chamfered simply by gripping the grip portions 4 and 5 while abutting the stoppers 10a and 10b. Moreover, since the length which the corner | angular part of the steel plate 11 protrudes from the cutting blades 7 and 9 at the time of a cutting | disconnection is restrict | limited by the stoppers 10a and 10b, it can always cut | disconnect correctly in a predetermined position. Furthermore, since a large machine requiring power, such as a cutting machine or a press machine, is not required, the cost required for cutting is low.

(Modification of Example 1)
In the hand-held tool of Example 1, the cutting edges of the cutting blades 7 and 9 were flat blades for cutting off the corners of the steel plate in a straight line. However, as shown in FIG. It is also possible to use round blades 40 and 41 that cut corners with a circular arc. If it is like this, the corner | angular part of a steel plate can be easily rounded by operation similar to Example 1. FIG. Moreover, since the length which the corner | angular part of the steel plate 11 protrudes from the round blades 40 and 41 at the time of a cutting | disconnection is restrict | limited by the stoppers 10a and 10b, it can always carry out R removal correctly in a predetermined position. Furthermore, since a large machine requiring power, such as a cutting machine or a press machine, is not required, the cost required for cutting is low.

(Example 2)
The hand-held tool of Example 2 is for chamfering a right-angled corner of a steel plate. As shown in FIG. 4, a rectangular parallelepiped-shaped stopper 20 is provided on both sides close to the cutting edge of the cutting blade 9. , 21 are fixed by screws (not shown) so as to be perpendicular to the base 8 in a symmetrical positional relationship so as to open in a U shape on the opposite side to the shaft portion 3. The angle formed by the side surface 20a and the side surface 21a on the cutting blade 9 side in the stoppers 20 and 21 is 90 degrees, and the height of the stopper 20 and the stopper 21 is higher than the upper surface 9a of the cutting blade 9. The stoppers 20 and 21 are guide means, the side surface 20a is a first contact surface, and the side surface 21a is a second contact surface. Other configurations are the same as those of the hand-held tool of the first embodiment shown in FIG. 1, and the same components are denoted by the same reference numerals and detailed description thereof is omitted.

Next, a method for using this handheld tool will be described.
As in the case of the hand-held tool of the first embodiment, the gripping portions 4 and 5 of the hand-held tool are held with one hand, and the cutting blades 7 and 9 are not engaged with each other by spreading the gripping portions 4 and 5 away from each other. State. Then, the right-angled corner portion of the steel plate 101 to be cut with the other hand is brought into contact with the side surfaces 20a and 21a of the stoppers 20 and 21. Thereby, the corner | angular part front-end | tip of the steel plate 101 protrudes in a right-angled isosceles triangle shape in the back rather than the position of the blade edge | tip of the cutting blades 7 and 9 (refer FIG. 5). And by holding | griping the holding parts 4 and 5 firmly, hold | maintaining this state, the cutting blades 7 and 9 will mesh | engage, and the right-angle corner | angular part tip of the steel plate 11 will be cut | disconnected by the shape of a right-angled isosceles triangle.
In addition, it is preferable that the screwing position of the stoppers 20 and 21 to the base 8 can be changed. If it is like this, since the length which the corner | angular part of the steel plate 11 protrudes from the cutting blades 7 and 8 can be adjusted, the magnitude | size of the right-angled isosceles triangular piece cut | disconnected in a chamfering can be changed.

  As described above, in the hand-held tool according to the second embodiment, the corners of the steel plate 101 are simply chamfered by simply grasping the grips 4 and 5 while abutting the corners of the steel plates 101 on the side surfaces 20a and 21a of the stoppers 20 and 21. be able to. Moreover, since the corner | angular part of the steel plate 101 contact | abuts to the side surfaces 20a and 21a of the stoppers 20 and 21, it guides to a predetermined position reliably rather than the case of the hand-held tool of Example 1, and there are few blurs. Moreover, since the steel plate 101 protrudes equally from the cutting blades 7 and 9 in the shape of a right-angled isosceles triangle at the time of cutting, the cut piece shape always has the same right-angled isosceles triangle shape, which is more accurate than the first embodiment. The right-angled isosceles triangular fragment can be cut off.

(Modification of Example 2)
As a first modification of the second embodiment, as shown in FIG. 6, covers 30 a and 31 a in which upper ends of the stoppers 30 and 31 are bent in an L shape may be provided. If it is like this, when the steel plate 101 to be cut comes into contact with the stoppers 30 and 31, it is possible to prevent the contact from coming off.
Further, as a second modification of the second embodiment, as shown in FIG. 7, a structure in which the upper ends of the stoppers 30 and 31 are covered with a cover 32 may be employed. In this case, when the steel plate 101 to be cut is brought into contact with the stoppers 30 and 31, it is possible to more reliably prevent the contact from being released.

(Example 3)
The hand-held tool of Example 3 is for chamfering a right-angled corner of a steel plate, and stoppers 40 and 41 are screwed to the side surface of the base 8 as shown in FIG. The screwing position is movable in the direction of the arrow in the figure. The stoppers 40 and 41 are bent in an L shape in a direction facing each other, and are opened in a U shape on the opposite side to the shaft portion 3. The side surface 40 a and the side surface 41 a are formed on the upper surface 9 a of the cutting blade 9. On the other hand, it is vertical. The angles formed by the side surface 40a and the side surface 41a on the side of the cutting blade 9 in the stoppers 40 and 41 are 90 degrees, and the height of the stopper 40 and the stopper 41 is higher than that of the upper surface 9a of the cutting blade 9. The stoppers 40 and 41 are guide means, the side surface 40a is a first contact surface, and the side surface 41a is a second contact surface. Other configurations are the same as those of the hand-held tool of the first embodiment shown in FIG. 1, and the same components are denoted by the same reference numerals and detailed description thereof is omitted.

Next, a method for using this handheld tool will be described.
As in the case of the hand-held tool of the first embodiment, the gripping portions 4 and 5 of the hand-held tool are held with one hand, and the cutting blades 7 and 9 are not engaged with each other by spreading the gripping portions 4 and 5 away from each other. State. And the right-angle corner | angular part of the steel plate which it is going to cut | disconnect with the other hand is made to contact | abut to the side surfaces 40a and 41a of the stoppers 40 and 41. FIG. Thereby, the corner | angular part front-end | tip of a steel plate protrudes in the shape of a right-angled isosceles triangle behind the position of the blade edge | tip of the cutting blades 7 and 9. FIG. And by holding | griping the holding parts 4 and 5 firmly, hold | maintaining this state, the cutting blades 7 and 9 will mesh | engage, and the right-angle corner | angular part tip of the steel plate 11 will be cut | disconnected by the shape of a right-angled isosceles triangle.
By changing the screwing position of the stoppers 40 and 41 to the base 8, the length at which the corners of the steel plates protrude from the cutting blades 7 and 8 can be adjusted. For this reason, the magnitude | size of the right-angled isosceles triangle piece cut | disconnected in chamfering can be changed. Further, by providing a plurality of positions of the female screw for screwing, the size of the right-angled isosceles triangular piece to be cut in stages can be changed. Accordingly, C1 (the length of the right side of the right-angled isosceles triangular piece to be cut is 1 mm) which is the type of chamfering, and C2 (the length of the right side of the right-angled isosceles triangular piece to be cut is 2 mm), C3 (the length of the side forming the right angle of the right-angled isosceles triangle piece to be cut is 3 mm), etc. can be easily selected.

  The present invention is not limited to the description of the embodiments and examples of the invention described above. Various modifications are also included in the present invention as long as those skilled in the art can easily conceive without departing from the scope of the claims.

  The hand-held tool of the present invention can be suitably used for chamfering or rounding corners of steel plates and the like.

DESCRIPTION OF SYMBOLS 1, 2 ... Housing, 3 ... Shaft part, 4, 5 ... Gripping part, 6 ... Cutting part 7 ... Cutting blade (1st cutting blade), 9 ... Cutting blade (2nd cutting blade)
40 ... round blade (first cutting blade, 41 ... round blade (second cutting blade)
10a, 10b, 20, 21, 30, 31 ... guide means (10a, 20, 30 ... stopper (first contact portion), 10b, 21, 31 ... stopper (second contact portion))
20a ... side surface (first contact surface), 20b ... side surface (second contact surface)
32 ... Cover

Claims (6)

A hand-held tool for cutting corners of a plate,
A shaft portion that pivotally supports an appropriate position of an intermediate portion of the two housings, a grip portion of the housing on one side of the shaft portion, and a cutting portion of the housing on the other side of the shaft portion Prepared,
In the cutting part,
A first cutting blade and a second cutting blade that mesh with each other by rotation about the shaft portion of the housing;
A first contact portion that contacts one side of the plate material corner when the first cutting blade and the second cutting blade are not engaged, and a second contact that contacts the other side of the plate material corner. A guide means for guiding the corner portion of the plate material to protrude by a predetermined length from between the two cutting blades;
Hand-held tool provided with   The first abutting portion has a first abutting surface that abuts on one side of the plate material corner, and the second abutting portion is a second abutment that abuts on the other side of the plate material corner. 2. The hand-held tool according to claim 1, wherein the tool has a surface and guides the corner portion of the plate material so as to project the corner portion of the plate material from between the two cutting blades into an isosceles triangle shape by the contact surfaces.   The hand-held tool according to claim 2, wherein an angle formed by the first contact surface and the second contact surface is a right angle.   The guide means is provided with a cover for preventing the plate material from coming out of contact when both sides of the plate material corner are brought into contact with the first contact portion and the second contact portion. The hand-held tool according to any one of claims 1 to 3.   The hand-held tool according to any one of claims 1 to 4, wherein the first cutting blade and the second cutting blade are capable of cutting a corner portion of a plate material linearly.   The hand-held tool according to any one of claims 1 to 4, wherein the first cutting blade and the second cutting blade are capable of cutting a corner portion of a plate material into an arc shape.

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