JP2011255484A - Cutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cutter which can sharply cut an opening without widening the opening in a cutting start position.SOLUTION: The cutter includes a base 10 on which a material to be cut is mounted, a rail to which a slider 40 is attached so as to freely slide, and an arm for detachably attaching the rail to the base. In the slider 40, a cutting edge 50 is provided which forms a cutter end 52 at a side edge extended from an end 51 having an acute angle. When the upper surface 43a of the slider is pushed down, the cutting edge is rotated in a direction A of the cutter end. Since the back of the cutting edge is guided by the cutter end to smoothly enter an inner part of the material to be cut, the opening can be prevented from being widened and a sharp slit can be formed in the cutting start position.

Description

  The present invention relates to a cutting machine for cutting a thick sheet material, and more particularly to a cutting machine capable of starting cutting from an accurate position.

A cutting machine for cutting thick sheet materials such as cardboard, styrofoam, and cardboard is composed of a base on which a material to be cut is placed, a slider to which a cutting blade is attached, a rail to which the slider is attached, and a rail. And a supporting arm. The material to be cut can be cut by moving the slider along the rail.
In such a cutting machine, a technique has been proposed in which a starting point reference stopper for regulating the position of the slider is provided so that cutting can be started from an accurate position (see Patent Document 1).

Japanese Utility Model Publication No. 6-30388

As shown in FIG. 7, the cutting machine 1 of Patent Document 1 can provide a cut at a desired position by pushing down the slider 2 in a state where the slider 2 is in contact with the starting point reference stopper 3 at the cutting start point P. However, when the slider 2 is pushed down to bring the cutting edge 4a of the cutting blade 4 into the material to be cut, the cut end may be widened depending on the thickness of the back portion 4b of the cutting blade 4.
In addition, when making a cut with a cutting blade, it is necessary to control the pressing force according to the material and properties of the material to be cut, so it is necessary to cut the corners sharply like a window hole in a frame mat If there is, it was often done manually using a cutter knife. Providing straight cuts manually requires skilled techniques, and it was difficult to open the window holes beautifully because they were off the cutting line or fuzzed on the cut surface.

  Then, this invention aims at provision of the cutting machine which can cut | disconnect sharply, without opening a cut end in a cutting start position.

In order to solve the above-described problems, a cutting machine according to the present invention includes a base on which a material to be cut is placed, a rail on which a slider is slidably attached, and an arm that attaches the rail to the base in a detachable manner. The slider includes a cutting blade having a sharp tip and a blade edge formed at a side edge extending from the tip, and pressing down the upper surface. Thus, the cutting blade is configured to be rotated toward the cutting edge side.
In this case, the slider may be configured such that the rotation is stopped at a position where the blade edge portion forms an angle of 40 ° to 70 ° with respect to the base.

The cutting blade may be disposed with a blade surface inclined with respect to the base.
Further, a stopper that regulates the sliding start position of the slider may be slidably provided on the rail.
Moreover, you may provide the display which shows the position of the blade edge | tip part when rotation of the said cutting blade stops on the upper surface of the said slider.
Moreover, you may provide the cutting line display which displays the line along the blade surface of the said cutting blade on the upper surface of the said slider.

  In the cutting machine according to the first aspect, the cutting blade rotates toward the blade edge portion by pushing down the slider, so that the back portion of the cutting blade is smoothly guided to the inside of the material to be cut while being guided by the blade edge portion. Can enter. Accordingly, it is possible to prevent the cut end from being widened by the thickness of the back portion of the cutting blade, and it is possible to make a sharp cut at the cutting start position.

In the cutting machine according to the second aspect, when the slider is pushed down, the rotation of the slider stops when the angle between the blade edge portion and the base is 40 ° to 70 °. On the other hand, it is possible to proceed by cutting in a state having a predetermined angle. For this reason, it is possible to perform smooth drawing and to prevent fuzz from occurring on the cut surface.
Since the cutting machine according to claim 3 is arranged so that the blade surface of the cutting blade is inclined with respect to the base, it is possible to obtain an inclined cutting surface, such as a window hole in a frame mat, and the like. A certain opening can be easily manufactured.

Since the cutting machine which concerns on Claim 4 provided the stopper which regulates the sliding start position of a slider, it can prevent being cut | disconnected in the state which protruded from the cutting start position.
Since the cutting machine which concerns on Claim 5 provided the display which shows the position of the blade edge | tip part when the cutting blade was rotated on the upper surface of the slider, it can prevent the misidentification of the cutting start position.
In the cutting machine according to the sixth aspect, since the line along the blade surface of the cutting blade is displayed on the upper surface of the slider, the misidentification of the cutting line can be prevented.

It is a perspective view which shows the cutting machine which concerns on embodiment of this invention. The slider of the said cutting machine is shown, (a) is an initial state, (b) shows the state rotated. It is explanatory drawing which shows the state in which the said slider rotates. It is a side view of the cutting machine provided with the slider which inclined the blade edge | tip of the cutting blade. It is a top view of the cutting machine provided with the slider provided with the stopper which has a stopper and has a display of a blade edge position, and a cutting line display. It is a table | surface which shows the implementation result by the slider which changed the arrangement | positioning angle of a cutting blade. It is explanatory drawing which shows the conventional cutting machine, (a) shows the state by which a cutting blade descend | falls and the cutting of a to-be-cut material is started, (b) is a BB arrow directional cross-sectional view, c) It is arrow sectional drawing seen from the back part side, (d) is arrow sectional drawing seen from the blade-tip part side.

  A preferred embodiment of the present invention will be described with reference to the accompanying drawings. In addition, embodiment is not limited to the following forms, Other aspects can also be implemented if the subject of this invention can be solved.

FIG. 1 is a perspective view of a cutting machine 1 according to the present invention.
This cutting machine 1 is for cutting a sheet material having a predetermined thickness, such as cardboard, foamed polystyrene, cardboard, etc., into a straight line. The cutting machine 1 is placed on both sides of the base 10 on which the material to be cut is placed. The arm 20 is movably attached, the rail 30 is erected on the arm 20, the slider 40 is mounted on the rail 30, and the cutting blade 50 is disposed at the lower end of the slider 40.

The base 10 is a longitudinal base having a flat surface on which a material to be cut is placed, and a rubber cutter mat 11 is disposed in the longitudinal direction at the center of the surface, and in parallel with the base, Ruled lines 12 for aligning the side edges of the cutting material extend at equal intervals.
At both ends of the base 10, pivot portions 13 are provided, and the arms 30 are rotatably attached via the pivot portions 13.
A rail 30 for slidably mounting the slider 40 is installed on the end of the arm 20 on the rotating side.

The rail 30 is a long member having an L-shaped cross section, and a pressing surface 31 for fixing the material to be cut on the base is formed on the bottom surface, and a rail portion 32 is formed on the top surface. A grip 33 for projecting the pivoting operation of the arm 30 is provided along the pivoting side edge.
A slider 40 is slidably attached to the rail portion 32.
A cutting blade 50 is disposed at the lower end of the slider 40. The cutting blade 50 is disposed at a position to be moved along the cutter mat 11 on the base.

Hereinafter, the configuration of the slider 40 will be described in detail with reference to FIG.
The slider 40 includes a base portion 41 that is slidably attached to the rail 30 and a holding member 42 that holds the cutting blade 50.
An operation member 43 for performing a push-down operation of the slider 40 is attached to the upper surface of the holding member 42. The operation member 43 is shaped like a hat, and the cutting direction can be identified by raising the upper surface 43a on the cutting start side.

By pushing down the upper surface 43a of the operating member 43, the cutting blade 50 is rotated together with the holding member 42, and the slider 40 is moved in the cutting direction in this state, but the pushing force at that time can be finely adjusted. As described above, the operation member 43 has a shape that is easy to fit in the hand.
The holding member 42 is rotatably attached to the base 41 via a rotation support shaft 44.
In the initial state shown in FIG. 2A, a cutting blade 50 is arranged at the lower end of the holding member 42 so that the acute-angled tip 51 is located at a height away from the base 10 by a predetermined distance. ing.

The cutting blade 50 is detachably attached to the holding member 42 via the attachment portion 45.
When viewed from the side of the blade surface, the tip 51 of the cutting blade 50 is an acute angle a corner. And the blade edge | tip part 52 is inclined and attached so that the angle of about 20 degrees may be made with respect to the base | substrate 10. As shown in FIG. From this inclined state, the cutting blade 50 is configured to be rotated in the direction A of the cutting edge portion 52 by pushing down the upper surface 43a on the cutting start position side of the operation member 43 (see FIG. 2B). ).

  The cutting blade 50 is stopped at a position that forms an angle b of about 40 ° to 70 ° (preferably about 60 °) from an initial state in which the cutting edge portion 52 forms an angle of about 20 ° with respect to the base 10. As described above, the rotation range is regulated. By stopping the cutting blade 50 at such an angle, the blade edge portion 52 can enter the surface of the material to be cut with an appropriate inclination, and smooth cutting is possible. Moreover, since the load at the time of cutting can be made low, it can suppress that a notch opening spreads and fluffing arises in a cut surface.

The usage state of the cutting machine 1 having the above-described configuration will be described.
First, the arm 20 is rotated in a direction in which the rail 30 is separated from the base 10. Then, after placing the material to be cut while performing alignment, the rail 30 is returned to fix the material to be cut.
Thereafter, the upper surface 43a of the slider 40 is pushed down with the slider 40 positioned at the cutting start position. Then, as shown in FIG. 3, the holding member 42 of the slider 40 is rotated with respect to the base 41 and the cutting blade 50 is also rotated, while the cutting edge 52 is moved into the material to be cut at a predetermined angle. enter in. In this state, by moving the slider 40 in the cutting direction, the cutting blade 50 can be moved along the cutting line while being guided to the cutting edge portion 52, and the material to be cut is cut.

The back portion 53 opposite to the blade edge portion 52 is guided to the blade edge portion 52 and smoothly enters the inside of the material to be cut. Thereby, it is possible to prevent the cut opening from spreading.
Moreover, since the rotation range is regulated so that the cutting blade 50 is stopped at a predetermined angle, the cutting blade 50 can be moved in a constant inclination state and can be cut smoothly. . Thereby, it can suppress that a wave | undulation and fluff arise in the cut surface of a to-be-cut object.

In addition, the cutting blade 50 in this embodiment may be arrange | positioned with the blade surface inclined with respect to the base | substrate 10, as shown in FIG. In this case, a separately prepared slider 40 ′ for oblique cutting may be used by replacing it, or when the holding member is attached to the base of the slider, the inclined state may be variable.
If this slider is used, an inclined cut surface can be obtained, so that a frame mat can be easily manufactured.

Further, as shown in FIG. 5, a stopper 35 for regulating the sliding start position of the slider 40 ″ may be provided on the rail 30 so as to be slidable. Thereby, the cutting starts beyond the cutting line. Can be prevented.
Further, as shown in FIG. 6, a display 46 may be provided on the upper surface of the slider 40 ″ to indicate the position of the blade edge portion 52 when the rotation of the cutting blade 50 is stopped by being pushed down. The cutting line display 47 which displays the line along the blade surface of 50 may be provided, This can prevent the misidentification of the cutting start position and the cutting line.

In order to obtain the optimum arrangement angle b of the cutting blade 40 in the present invention, the angle between the blade edge portion and the base when the rotation of the slider stops is 90 °, 80 °, 70 °, 60 °, The arrangement state of the cutting blade 50 was changed so as to be 50 °, 40 °, 30 ° or 20 °, and the sharpness thereof was examined.
As a result, as shown in FIG. 6, when the arrangement angle b of the cutting blade 50 was 70 ° or more, burrs occurred on the upper surface of the cut surface when the cutting blade 50 entered the material to be cut. When the arrangement angle was 30 ° or less, the upper surface of the cut surface was beautiful, but the cut surface was wavy.

It was also found that the load at the time of cutting gradually increases as the arrangement angle b of the cutting blade 50 is set to 50 ° or less.
When comprehensively judging the operability at the time of cutting, the beauty of the cutting line, and the like, it was found that the arrangement angle b of the cutting blade 50 is preferably 40 ° to 70 °, and the optimum value is about 60 °.

  The present invention can be applied to a cutting machine used in the field of office work or industry.

DESCRIPTION OF SYMBOLS 1 ... Cutting machine 10 ... Base 11 ... Cutter mat 12 ... Ruled line 13 ... Pivoting part 20 ... Arm 30 ... Rail 31 ... Holding surface 32 ... Rail part 33 ... gripping part 40, 40 ', 40 "... slider 41 ... base part 42 ... holding member 43 ... operating member 44 ... rotating support shaft 45 ... mounting part 46. ..Display 47: Cutting line display 50 ... Cutting blade 51 ... Tip 52 ... Blade tip 53 ... Back

Claims (6)

A base (10) on which a material to be cut is placed, a rail (30) to which a slider (40) is slidably attached, and an arm (20) that attaches the rail (30) to the base (10) so as to be detachable. And a cutting machine (1) configured to include:
The slider (40) includes a cutting blade (50) having a sharp tip portion (51) and forming a blade edge portion (52) at a side edge extending from the tip portion (51), and has an upper surface. A cutting machine characterized by being configured to be rotated toward the blade edge portion (52) side of the cutting blade (50) by being pushed down.   The slider (40) is configured such that the rotation is stopped at a position where the blade edge portion (52) forms an angle of 40 ° to 70 ° with respect to the base (10). The cutting machine according to claim 1.   The cutting machine according to claim 1 or 2, wherein the cutting blade (50) is disposed with a blade surface inclined with respect to the base (10).   The stopper (35) for restricting the sliding start position of the slider (40) is provided on the rail (30) so as to be slidable. The cutting machine described.   The display (46) which shows the position of the blade edge | tip part (52) when rotation of the said cutting blade (50) stopped was provided in the upper surface of the said slider (40), The claim 1 characterized by the above-mentioned. The cutting machine according to claim 1. The cutting line display (47) which displays the line along the blade surface of the said cutting blade (50) was provided in the upper surface of the said slider (40), The any one of Claims 1-5 characterized by the above-mentioned. Cutting machine according to one claim.