JP3125132B2 - Rotary blade holder for cutter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary blade holder for a cutter, which makes it easy to replace the cutter blade.

[0002]

2. Description of the Related Art FIG. 9 shows an example of a paper cutting machine. A holding portion 2 for a rail 3 is provided at one end of the base 1 to hold the rail 3 rotatably.
Is installed. Then, when cutting the paper, the paper is placed on the base 1 and the rail 3 is tilted, and the locking claw 6 provided at the tip of the rail 3 is locked to the locking portion 7 provided on the base 1, The paper is fixed between the upper surface of the base 1 and the holding plate 4 provided on the lower surface of the rail 3. Then, by moving the slider 5 along the rail 3, the slider 5 is moved.
The cutting blade cuts the paper while rotating.

[0003] The rotary blade is held by a shaft provided on the holder 8. With the rotary blade held, a knob 9 provided on the holder 8 is pinched, and a screw rod implanted on the slider 5 side is held. Through the insertion hole made in the holder 8 and tighten the nut
10 is used to fasten and fix the slider 5.

The conventional holder 8 will be described with reference to FIG. In the figure, a shaft 12 is fixed to the back surface of the holder 8, and a polygonal bearing 13 is supported on the shaft 12.
A concave portion 15 having a diameter slightly larger than the diameter of the rotary blade 11 and slightly smaller than the thickness of the rotary blade 11 is formed. In addition, a part of the lower end of the arc of the concave portion 15 is cut off.
Partially cut off at 17 and supports the support hole 111 of the rotary blade 11
A part 11 ′ of the rotary blade 11 is exposed from the lower end of the holder 8 when the rotary blade 11 is fitted and supported on the holder 13. Reference numeral 16 denotes a magnet plate for attracting and holding the rotary blade 11 in the recess 15. In this manner, with the rotary blade 11 held in the holder 8, the knob 9 shown in FIG. 9 is grasped, the screw rod planted on the slider 5 side is inserted into the insertion hole 14, and the nut 10 is fastened. .

A conventional example shown in FIG.
A shaft 12 for supporting the rotary blade 11 is provided on the side, and a locking portion 503 for attaching the holder 8 is provided as shown in FIG. Further, as shown in FIG. 13, an engaging claw 801 for locking with the locking portion 503 is provided on the holder 8 side. Also, in this conventional example, a cutting portion 17 is provided so that a part 11 'of the rotary blade 11 is exposed.

[0006]

In order to cut the paper, the rotary blade must be exposed from the holder. For this reason, in the conventional holder shown in FIG. 10, the rotary blade is exposed from the lower end thereof.
The holder 8 holding 11 must be attached to the slider 5, and there is a problem that handling as office equipment is troublesome. To fix the holder 8 to the slider 5, a screw rod implanted on the slider 5 side is fixed to the holder 8.
In this case, since the rotary blade 11 is inserted into the through hole 14 and fastened with the nut 10, it is troublesome to handle the office equipment when replacing the rotary blade 11.

Next, in the conventional example shown in FIG. 11, since only the engaging claw 801 of the holder 8 is engaged with the locking portion 503 of the slider 501, the attachment / detachment of the holder 8 to / from the slider 501 itself is performed. Can be easily performed, but there are the following problems when replacing the rotary blade. That is, the rotary blade 11 is not held by the holder 8 and the slider 501
9 and the slider 501 is not removed from the rail 3 shown in FIG. 9, so when the rotary blade 11 is replaced, the rotary blade 11 is directly held by hand and fitted on the shaft 12 of the slider 501. Since the rotation blade 11 must be used, a finger directly touches the rotary blade 11, and there is a problem that handling as an office tool is troublesome. Also, even if the rotary blade is held on the holder 8 side, a part of the rotary blade 11
Since 1 'is exposed, there is a possibility that a finger touches the exposed portion, and there is a problem that the handling as office equipment is troublesome as in the conventional example shown in FIG.

According to the present invention, when the rotary blade is held by the holder main body and is not yet attached to the slider, the finger does not touch the blade edge of the rotary blade exposed from the holder main body, and the holder main body is fixed to the slider. When doing, while making the blade tip of the rotary blade come out from the lower end of the holder body, simplifying the attachment of the holder body to the slider,
An object of the present invention is to provide a rotary blade holder for a cutter, which is easy to handle as an office equipment.

[0009]

Means for solving the above problems according to the present invention, which is grasped from the description of claim 1, is detachably mounted on a slider that moves along a rail of a cutter, and is rotated. In a holder for a rotary blade for a cutter that replaceably holds a blade, the holder is formed by a holder main body and a rotary blade holder rotatably provided on the holder main body, and a center of the rotary blade holder. A shaft for rotatably supporting the rotary blade is fixed on the rotary blade holder. The outer edge of the rotary blade holder is connected to a fixed portion provided on the slider by rotating with respect to the holder body. The outer edge of the rotary blade holder is substantially circular with a diameter larger than the diameter of the rotary blade, and the protrusion is engaged with a fixing portion provided on the slider. A part of an arc is cut off so that a part of the rotary blade protrudes from the holder, and the rotary blade holder is rotated with respect to the holder main body to engage with a fixed portion provided on the slider. When the projected projection is released, the part obtained by cutting off a part of the arc is hidden in the holder, and a circular part having a diameter larger than the diameter of the rotary blade projects from the holder to cover the cutting edge of the rotary blade. It is characterized in that it is formed in a shape that can be made.

With this configuration, the holder of the present invention is formed by the holder body and the rotary blade holder,
The rotary blade is held by a rotary blade holder, and the rotary blade holder can be rotated with respect to the holder body. In addition, the projection provided on the outer edge of the rotary blade holder can be engaged with the fixed portion provided on the slider by rotating with respect to the holder main body, so that the holder is detachable from the slider. Attached to. The shape of the rotary blade holder is substantially circular, but a part of the arc is cut off, and the diameter of the circular shape is larger than the diameter of the rotary blade. When the protrusion is engaged with the fixed portion provided on the slider, an arc that is a circular portion of the rotary blade holder that is not cut away is hidden in the holder, and a part of the held rotary blade projects from the holder. I do. In addition, in order to replace the rotary blade, when the rotary blade holder is rotated with respect to the holder main body and the projection engaged with the fixed portion provided on the slider is released, a part of the arc is cut off. Is hidden in the holder, and an arc that is a circular portion that is not cut out protrudes from the holder, so that the blade edge of the rotary blade protruding from the holder is covered by the circular portion of the rotary blade holder having a large diameter.

After the rotary blade is replaced, the rotary blade holder is rotated while being pressed against the slider, so that the projection provided on the outer edge of the rotary blade holder engages with the fixing portion provided on the slider body. The rotary blade holder and the holder main body are fixed to the slider, and the rotary blade holder is rotated and a circular portion that is not cut off is hidden in the holder, and a part of the rotary blade held by the rotary blade holder is removed. Project from the holder.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a rotary blade holder for a cutter according to the present invention will be described mainly with reference to FIGS. The cutter rotary blade holder of the present invention is generally detachably mounted on a slider (see FIG. 9) 26 that moves along the cutter rail 3, and holds the rotary blade 11 in a replaceable manner. The holder 31 of
As shown in FIGS. 1 and 2, the holder 31 is formed by the holder main body 18 and the rotary blade holder 19. The shape of the rotary blade holder 19 is a circular shape having a diameter larger than the diameter of the rotary blade 11, and is provided with a cutout portion 17 in which a part of an arc is cut so that a portion 11 'of the rotary blade 11 projects. I have.
A shaft 12 is fixed to the center of the rotary blade holder 19, and a polygonal bearing 13 is rotatably supported on the shaft 12.
A projection 20 is provided on the outer edge of the rotary blade holder 19, and as shown in FIG.
262 is provided on the slider 26.

In FIG. 1, a rotary blade holder 19 is rotatably provided on a holder body 18. This holder body 18
As shown in FIG. 3, a flange 181 having a width W1 is formed, and the outer shape in which the flange 181 is not provided on the lower side where the rotary blade 11 is exposed is a square U-shape. . The flange 181 serves as a guide surface when mounted on the slider 26, as described later. Further, the width W1 of the flange 181 is determined by AA in FIG.
As shown in FIG.
Guide part 261 so that it is almost flush with the guide part
Is formed to have the same width as the inside.

The rotary blade holder 19 has a diameter D as shown in FIG.
A shaft portion 191 is formed, and is rotatably supported by a hole formed in the holder body 18. In addition, this shaft 191
As shown in FIG. 2, a flange 192 is formed at the end of the shaft so that the shaft 191 does not come off from the holder main body 18. The flange 192 rotates the rotary blade holder 19. Lever 193 is integrally provided.

In the present embodiment, the rotary blade holder 19 is a circle having a diameter somewhat larger than the outer diameter of the rotary blade 11, and as shown in FIG. It has been cut away so that a part 11 ′ of the rotary blade 11 is exposed from the lower end of the holder body 18. Further, a circular concave surface 15 substantially equal to the diameter of the rotary blade 11 is formed on the surface of the rotary blade holder 19, and the depth thereof is slightly smaller than the thickness of the rotary blade 11. A protrusion on the outer periphery of the rotary blade holder 19
The projection 20 is provided so as to be located on a center line parallel to the cutout 17 passing through the center of the shaft 12.

As shown in FIG. 1, a lock lever 21 is provided on the holder body 18 so as to be rotatable by a pin 23, and a lock pin 25 provided at the tip of the lock lever 21 has an outer periphery of the rotary blade holder 19. The elastic force of the spring 22 is constantly applied to the lock lever 21 in a direction in which the lock lever 21 is fitted in the recess 194 provided on the surface. When the lock pin 25 is fitted in the recess 194, the protrusion provided on the rotary blade holder 19 is provided.
The position of 20 is substantially horizontal with respect to the bottom of the holder body 18. When the lock pin 25 is fitted in the recess 194, the rotation of the rotary blade holder 19 is locked. Further, the end of the lock lever 21 protruding from the elongated hole 24 formed in the flange 181 of the holder body 18 is pressed against the elastic force of the spring 22 to rotate the lock lever 21 about the pin 23, By removing the lock pin 25 from the depression 194, the rotation lock of the rotary blade holder 19 is released.

In FIG. 4, the slider 26 is also provided with a circular concave surface 27 having a diameter substantially equal to the diameter of the rotary blade 11, and the depth thereof is slightly smaller than the thickness of the rotary blade 11. The slider 26 has a flange 1 of the holder body 18.
A guide portion 261 for guiding the guide 81 is provided. When the guide portion 261 guides the holder body 18 and fits the slider 26, a shaft hole in which the shaft 12 and the bearing 13 provided on the holder body 18 fit. 29 and bearing holes 28 are drilled. Also concave
27 are provided with fixing parts 262 on both sides.
The projection 20 provided on the 18 is adapted to be engaged. As shown in FIG. 8, the fixing portion 262 is provided with a stopper surface 263 and a projection insertion portion 264, and both stopper surfaces 263 of the fixing portion 262 provided on both sides of the concave surface 27 are opposite to each other. It has become. 30 is a rail guide groove.

The operation of the embodiment constructed as described above will now be described. As shown in FIG. 3, by fitting the support hole 111 of the rotary blade 11 into the bearing 13 provided in the holder body 18, the rotary blade 11 is attracted to the magnet 16 and
Is held within. After holding the rotary blade 11 on the rotary blade holder 18 in this manner, the lock lever 21 is rotated to release the lock, and the lever 193 is pinched to rotate the rotary blade holder 19 as shown in FIG. Thereby, the cutout portion 17 of the rotary blade holder 19 is hidden in the holder 31, and the outer edge of the rotary blade holder 19 protruding from the holder 31 covers the cutting edge of the rotary blade 11 exposed from the lower end of the holder body 18. Eleven cutting edges do not touch the finger.

Since the projection 20 is provided on a parallel line passing through the shaft 12 with respect to the cutout 17, the projection 20 is in a state where the cutting edge of the rotary blade 11 is covered by the rotary blade holder 19.
As shown in FIG. 7, it is located at a position 20 'in contact with the lock pin 25'. When the rotary blade holder 19 is mounted on the slider 26,
It is located at a position deviated from the fixing part 262.

Next, as shown in FIG. 6, the flange 181 of the holder body 18 is guided by the guide portion 261 of the slider 26, and the shaft 12 and the bearing 13 are connected to the shaft hole 29 and the bearing hole 28 (FIG. 4).
Then, the lever 193 is pinched and the rotary blade holder 19 is rotated to fit the protrusion 20 into the fixing portion 262 as shown in FIG.
As a result, the outer edge of the rotary blade holder 19 covering the cutting edge of the rotary blade 11 exposed from the lower end of the holder body 18 is
The rotary blade is hidden by the cutout 17 of the rotary blade holder 19
In a state where the cutting edge 11 is exposed, as shown in FIG.
Is rotated by the spring 22, and the lock pin 25 is recessed 1
The rotation of the rotary blade holder 19 is locked by fitting into the 94.

By locking the rotation of the rotary blade holder 19, even if the rotary blade holder 19 is inadvertently rotated, the fitting between the projection 20 and the fixing portion 262 does not come off. The blade 11 can be stably supported. When removing the rotary blade 11, the lock lever 21 is rotated to release the fitting between the lock pin 25 and the recess 194, and the rotary blade holder 19 is rotated to remove the fitting between the projection 20 and the fixing portion 262. Is released, the exposed blade edge of the rotary blade 11 is covered with the rotary blade holder 19, so that the finger does not touch the blade edge.

Then, as shown in FIG. 7, the projection 20 comes into contact with the lock pin 25 'to restrict the rotation of the rotary blade holder 19, so that the position of the projection 20 is fixed on the slider 26. When the holder body 18 is ready to be pulled out, the next time the holder body 18 is mounted, the holder body 18 is pressed against the slider 26 in that state, and the rotary blade holder 19 is simply rotated, so that the projection 20 Are engaged with the fixing portion 262. The rotating blade 11 is attached to the holder body 18
At the same time, by pulling out the rotary blade holder 19 from the slider 26, the rotary blade holder 19 can be removed from the rotary blade holder 19.

In the connection between the holder main body 18 and the slider 26, the displacement of the holder main body 18 with respect to the slider 26 is restrained by fitting of the flange 181 and the guide portion 261 as shown in FIG. Is fitted in the shaft hole 29 and the bearing hole 28, so that the concave surface 15 formed in the rotary blade holder 19 and the concave surface 27 formed in the slider 26 are kept substantially parallel,
The rotary blade 11 is inserted into the space formed by the two concave surfaces 15 and 27.
The side surface of the rotary blade 11 is guided with a slight gap between the two concave surfaces 15 and 27, without generating frictional force on both surfaces of the rotary blade 11, while rotating the rotary blade 11 smoothly, A bending force is not generated on the rotary blade 11 due to the force when cutting the paper, so that the rotary blade 11 is prevented from being broken.

[0024]

As described in detail above, according to the present invention, which is understood from the detailed description of the invention based on the first aspect, the rotary blade holder for holding the rotary blade on the holder main body is rotated. A protrusion movably provided, the shaft is fixed to the center of the rotary blade holder to support the rotary blade, and the rotary blade holder is rotated with respect to the holder body to engage with a fixed portion provided on the slider. Are provided on the outer edge of the rotary blade holder, and the shape of the rotary blade holder is substantially circular with a diameter larger than the diameter of the rotary blade, and the projection is engaged with a fixing portion provided on the slider. Sometimes, a part of the arc is cut off so that a part of the rotary blade protrudes from the holder, and the rotary blade holder is rotated with respect to the holder main body to release the projection engaged with the fixing portion provided on the slider. Cut off part of the arc The part that was made is hidden in the holder, and a circular part with a diameter larger than the diameter of the rotary blade is formed in a shape that can protrude from the holder and cover the cutting edge of the rotary blade, so by rotating the rotary blade holder, The holder main body can be easily attached to and detached from the slider main body, and furthermore, a partially exposed blade edge of the rotary blade can be covered with the rotary blade holder, thereby preventing a finger or the like from touching the rotary blade. be able to.

[Brief description of the drawings]

FIG. 1 is a partially longitudinal front view of a holder according to an embodiment of the present invention.

FIG. 2 is a rear view of FIG.

FIG. 3 is a perspective view showing a state where a rotary blade is mounted on a holder in FIG. 1;

FIG. 4 is a perspective view showing a state where the holder in FIG. 1 is mounted on a slider.

FIG. 5 is a longitudinal sectional view taken along line AA of FIG. 1;

FIG. 6 is a longitudinal sectional view showing a state in which a holder is mounted on a slider.

FIG. 7 is a partially longitudinal front view showing a state where the rotary blade holder of the holder in FIG. 1 is rotated.

FIG. 8 is a front view showing a relationship between a rotary blade holder and a slider.

FIG. 9 is a perspective view of a paper cutting machine.

FIG. 10 is a perspective view of a conventional holder.

FIG. 11 is a perspective view of another conventional example.

FIG. 12 is a front view of the slider in FIG. 11;

FIG. 13 is a front view of the holder in FIG. 11;

[Explanation of symbols]

 11 Rotary blade 111 Support hole 12 Shaft 13 Bearing 15 Recess 16 Magnet 17 Cutout 18 Holder body 181 Flange 19 Rotary blade holder 191 Shaft 192 Flange 193 Lever 194 Depression 20 Projection 21 Lock lever 22 Spring 23 Pin 24 Long hole 25 Lock pin 26 Slider 261 Guide part 262 Fixed part 263 Stopper surface 264 Projection insertion part 27 Concave surface 28 Bearing hole 29 Shaft hole 30 Rail guide groove 31 Holder

Claims (1)

(57) [Claims] 1. A rotary blade that is detachably mounted on a slider that moves along a rail of a cutter and that is capable of replacing a rotary blade.
In Holder cutter for a rotary blade for lifting, the holder includes a holder body, pivotally to the holder body
And a rotary blade holder provided at the center of the rotary blade holder.
Is fixed to the outer edge of the rotary blade holder with respect to the holder body.
A fixed portion provided on the slider by rotating
Is provided, and the outer edge of the rotary blade holder is larger than the diameter of the rotary blade.
It is substantially circular in diameter and has a fixed
When the projection is engaged with the fixed part, part of the rotary blade
A part of the arc is cut off so that it protrudes from the holder.
The rotary blade holder is rotated with respect to the holder body.
And a projection engaged with a fixed portion provided on the slider.
Is released, a part of the arc is cut off
Is hidden in the holder and larger than the diameter of the rotary blade.
The circular part with a large diameter protrudes from the holder and the cutting edge of the rotary blade
Rotation blade Holder cutter, characterized in that it is formed in a shape which can be covered.