JP3133500B2 - Cutter holder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutter holder, and more particularly to a cutter holder suitable for use as a cutting pen cutter holder in a cutting plotter.

[0002]

2. Description of the Related Art In recent years, a cutting plotter, which is operated by a computer and cuts a sheet into a predetermined shape, has been widely used. In such a cutting plotter, a cutting pen having a cutter holder holding a cutter for cutting a sheet is used as a cutting device for cutting a sheet.

In a cutting pen used for such a cutting plotter, when a cutter is attached to a cutter holder, a predetermined length (extremely short length) is required to cut the sheet smoothly. And is usually about 3 mm.), And is mounted such that the tip of the blade tip of the cutter can maintain a predetermined height with respect to a reference plane. For this reason, the cutter holder needs to be structured so that the cutter is accurately positioned at a preset position in the axial direction of the cutter holder.

Further, in order to cut the sheet smoothly, it is necessary to adopt a structure in which the cutter is held rotatably around the axis with respect to the cutter holder. .

Conventionally, in order to satisfy the above-mentioned necessity, a cutter holder 102 having a structure as shown in FIG. 4, for example, has been proposed, and a cutter 104 is attached to the cutter holder 102 to constitute a cutting pen 100. Was.

[0006] The cutter holder 102 has a cylindrical holder member 106, and a female screw portion having a start end portion 106 d near an opening portion 106 c of an upper end portion 106 b on an inner peripheral portion 106 a of the holder member 106. 106e is formed. And it is positioned and set at a predetermined position in advance in a substantially axially intermediate portion from the terminal end portion 106f of the female screw portion 106e located on the opposite side of the opening portion 106c toward the lower end portion 106g of the holder member 106. The stepped portion 106h is formed so as to protrude toward the inner diameter side.

The lower end 106 of the holder member 106
A miniature bearing 108 is provided in the recess 106i formed in the g.

[0008] The holder member 10 as described above.
6 to form a cutter holder 102 and attach the cutter 104 to the cutter holder 102 so as to be rotatable around the axis while positioning the cutter 104 in the axial length direction. Was carried out by a simple work process.

First, a cylindrical pivot holder 110
Then, the pivot bearing 112 is fixed by bonding.
Thus, the pivot holder 110 to which the pivot bearing 112 is fixed is attracted to the magnet 114, and the magnet 114 is further attracted to the set screw 116 having a backup effect of the magnetic force of the magnet 114.

Note that the outer periphery of the set screw 116 has
A male screw portion 116a that is screw-coupled to the female screw portion 106e of the holder member 106 is formed.

As described above, the pivot holder 110 to which the pivot bearing 112 is fixed and the set screw 116, which are integrally attracted to the magnet 114 by the magnetic force of the magnet 114, are connected to the opening 106 of the upper end 106 b of the holder member 106. From 106c, the bearing is inserted into the holder member 106 with the pivot bearing 112 at the head.

The male screw portion 116 of the set screw 116
a and the female screw portion 106 e of the holder member 106 are screwed together, and until the lower end portion 110 a of the pivot holder 110 abuts against the stepped portion 106 h of the holder member 106.
A set screw 116 is screwed into the holder member 106. In this way, while positioning the pivot holder 110 in the axial direction with respect to the holder member 106, the set screw 11
6 is fixed in the holder member 106 to form the cutter holder 102.

Next, in the cutter holder 102 formed as described above, the blade 104 is attached to the tip 104a.
cutter 1 composed of magnetic material attached by processing b
04 will be inserted. And this cutter 10
4 in a state where the base end portion 104c is rotatably supported at the center of the pivot bearing 112 around the axis and the front end portion 104a is inserted into the miniature bearing 108, and the attraction force based on the magnetic force of the magnet 114 Thus, it is absorbed by the pivot bearing 112 and is supported in the cutter holder 102.

Thus, the cutting pen 1 shown in FIG.
00 is to be configured.

Accordingly, the cutting pen 10 shown in FIG.
0, the pivot holder 110 is positioned at a predetermined position in the axial direction with respect to the holder member 106, so that the pivot bearing 112 fixed to the pivot holder 110 is It will be positioned. For this reason, the cutter 10 rotatably supported by the pivot bearing 112
Numeral 4 is to be positioned at a predetermined position in the axial direction with respect to the cutter holder 102.

Further, since the cutter 104 is held in the cutter holder 102 by being attracted by the magnet 114 via the pivot bearing 112, it is possible to prevent the cutter 104 from dropping from the cutter holder 102. The cutter 104 is arranged to be rotatable around the axis with respect to the cutter holder 102.

Then, the cutting pen 100 thus constructed is mounted on a cutting plotter main body, and a sheet or the like is cut into a predetermined shape.

However, the cutter 104 attached to the cutter holder 102 may be replaced with a cutter having a different blade length depending on the thickness of the sheet, or a new cutter may be replaced due to damage to the blade 104b. The cutter 104 into the cutter holder 10
2 and remove another cutter from the cutter holder 1
It is necessary to frequently perform the work of attaching to the 02.

At the time of replacing the cutter 104, the tip 104a of the cutter 104 hardly protrudes from the lower end 106g of the holder member 106 of the cutter holder 102.
Only about 3 mm protrudes. ), It was not possible to pull the cutter 104 out of the cutter holder 102 by grasping the tip portion 104a with fingers. For this reason,
The tip 104 a was gripped by using tweezers to extract the cutter 104 from the cutter holder 102.

It is also conceivable to remove the cutter 104 from the opening 106c of the holder member 106 by removing the set screw 116. However, the cutter 104
Since the positioning and fixing of the pivot holder 110 for performing the positioning are performed by screwing and fixing the set screw 116 to the holder member 106, the set screw 1 is fixed.
When the set screw 116 is removed from the holder member 106 in addition to the complicated work of removing the 16 itself, the pivot holder 110 needs to be positioned again. For this reason, removal of the set screw 116 from the holder member 106 has caused an extremely complicated operation.

Therefore, as described above, by using the tweezers to grip the tip end portion 104a of the cutter 104 protruding from the lower end portion 106g of the holder member 106, it is necessary to remove the cutter 104 from the cutter holder 102. did not become.

[0022]

However, when the cutter is removed from the cutter holder by using the tweezers as described above, the vicinity of the blade portion of the cutter having a substantially conical shape is gripped by the tapered grip portion of the tweezers. Since it is necessary to hold the blade, there is a problem that it is very difficult to hold the blade and there is a possibility that the blade may be erroneously damaged.

On the other hand, unlike the cutter holder having the structure shown in FIG. 4, the cutter holder is formed into a two-part structure, and the cutter is positioned between the two-part cutter holder. There is known a cutter holder that integrally connects and fixes the above and a screw using a screw.

In the cutter holder having such a structure, the cutter holder can be easily disassembled by removing the screw, so that it is not necessary to remove the cutter from the cutter holder using tweezers. However, when the cutter holder is divided, the cutter may be dropped by mistake, and the structure of the cutter holder itself becomes complicated, resulting in an increase in manufacturing cost.

The present invention has been made in view of such various problems of the prior art, and has as its object to increase the manufacturing cost without increasing the cost.
An object of the present invention is to provide a cutter holder capable of easily and safely extracting a cutter from a cutter holder, and quickly performing the operation without damaging the cutting edge.

[0026]

In order to achieve the above-mentioned object, a cutter holder according to the present invention comprises a cutter having a blade formed at one end thereof, which is attracted by a magnetic force of a magnet, and the one end is attached to the cutter. In a cutter holder that protrudes by a predetermined length in the axial direction and that is rotatably supported around an axis, a cylindrical holder member and a magnetic tubular member inserted into the holder member and positioned at a predetermined position. And a magnet inserted into the holder member and attracted to one end of the magnetic tubular member by magnetic force; and a magnet inserted into the holder member and integrated with the magnet on the opposite side of the magnetic tubular member. And a pivot bearing for rotatably supporting the cutter around the axis by the magnetic force of the magnet. It is obtained by the.

[0027]

The magnetic tubular member and the magnet are attracted only by the magnetic force of the magnet.
Pivot bearings are integrally mounted. The cutter is rotatably supported by the pivot bearing by the magnetic force of the magnet.

Therefore, the magnet is pressed by the rod-shaped body penetrating the magnetic tubular member from the outside of the holder member opposite to the side where the blade portion of the cutter is located, and the magnet is pressed from the magnetic tubular member against the magnetic force of the magnet. Move the magnet to separate. In this way, the magnet is separated from the magnetic tubular member and moves, so that the cutter supported by the pivot bearing integrated with the magnet gradually projects from the holder member. For this reason, it is possible to easily and safely and quickly pull out the cutter from the holder member by grasping the body portion of the cutter on which the blade portion of the cutter is not formed by the finger.

The pivot bearing is positioned by adsorbing a magnet integrally mounted with a pivot bearing for supporting the cutter to a magnetic tubular member positioned and fixed at a predetermined position on the holder member. Therefore, even if the rod for separating the magnet from the magnetic tubular member is eliminated, and the magnet is re-adsorbed to the magnetic tubular member by magnetic force, the pivot bearing integrated with the magnet does not move with respect to the holder member. Will be accurately positioned. Therefore, it is possible to accurately position the cutter with respect to the cutter holder and configure the cutting pen without having to perform a complicated positioning operation again.

When the pivot bearing is integrally attached to the magnet, the pivot bearing may be attracted by the magnetic force of the magnet, or may be fixed by bonding or the like.

[0031]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A cutter holder according to the present invention will be described below in detail with reference to the drawings. The same components as those of the above-described conventional cutting pen 100 are denoted by the same reference numerals, and the detailed description of the configuration and operation is omitted.

FIG. 1 shows a cutting pen having a cutter holder according to a first embodiment of the present invention.

The cutting pen 10 is similar to the conventional cutting pen 100 and has a cutter holder 12.
And the cutter 104 supported by the cutter holder 12
It is composed of

The holder member 14 of the cutter holder 12
Is an inner peripheral portion 14 having an inner diameter extending in the axial direction and having substantially the same diameter.
It is a substantially cylindrical member formed to have a.

A magnetic pipe 16 made of a magnetic material is inserted into the holder member 14, is positioned at a predetermined position, and is adhered and fixed to the inner peripheral portion 14a.

Further, one end is attached to the lower end of the magnetic pipe 16.
6a, a magnet 20 that has attracted the pivot bearing 18 by magnetic force is attracted by magnetic force.

In order to dispose the pivot bearing 18 and the magnet 20 in the holder member 14 as described above, the magnet 20 is inserted through the opening at the lower end portion 14b side of the holder member 14, and the magnetic pipe 16 What is necessary is just to make it adsorb | suck to the lower end part 16a, and also to insert the pivot bearing 18 similarly and to adsorb it to the magnet 20. At this time, if the pivot bearing 18 is previously attracted to the magnet 20 and the magnet 20 integrated with the pivot bearing 18 is inserted into the holder member 14, the assembling work is further facilitated.

The pivot bearing 18 and the magnet 20 are arranged in the holder member 14 by setting the dimensions so that the outer peripheral portions 18a and 20a are in contact with the inner peripheral portion 14a of the holder member 14, respectively. Can be prevented.

After the magnetic pipe 16, the magnet 20, and the pivot bearing 18 are sequentially arranged in the holder member 14 as described above, the miniature bearing 108 is formed in the recess 14c formed in the lower end portion 14b of the holder member 14. Is provided, the cutter holder 12 is configured.

The cutter holder 12 thus constructed
Is a pivot bearing 18 supporting the cutter 104.
Are integrated with the magnet 20, and the magnet 20 is attracted to the magnetic pipe 16 positioned and fixed to the inner peripheral portion 14a of the holder member 14. For this reason,
The pivot bearing 18 also moves with respect to the holder member 14,
As a result, the positioning of the cutter 104 with respect to the cutter holder 12 is achieved.

The magnetic pipe 16 is connected to the holder member 14.
The position at the time of positioning with respect to the inner peripheral portion 14a is set in advance in relation to a predetermined protrusion length of the distal end portion 104a of the cutter 104 protruding from the lower end portion 14b of the holder member 14.

In the above configuration, the cutter 104 is inserted into the miniature bearing 108 to
4 is supported by the pivot bearing 18. Cutter 1 supported on pivot bearing 18
04 is rotatably supported while being attracted to the pivot bearing 18 by the magnetic force of the magnet 20. In this way, the cutter 104 is attached to the cutter holder 12 to form the cutting pen 10.

The thus constructed cutting pen 10
In order to replace the cutter 104, as shown in FIG. 2A, the eject pin 30 is inserted from the opening 14e located on the upper end portion 14d side of the holder member 14, pressed in the direction of the arrow A, and Is moved in the direction of the lower end portion 14c of the holder member 14. That is, magnet 2
The magnet 20 is separated from the magnetic pipe 16 and moves toward the lower end 14c of the holder member 14 against the magnetic force attracting the magnetic pipe 16 to the zero.

At this time, since the pivot bearing 18 is attracted to the magnet 20 by magnetic force, and the cutter 104 is attracted by the magnetic force via the pivot bearing 18, the cutter 104 also moves in the direction of arrow A. The cutter 104 is pushed out of the cutter holder 12. The body 104 of the cutter 104 pushed out of the cutter holder 12 in this manner.
By holding d with fingers, the cutter 104 can be easily, safely, and quickly extracted from the cutter holder 12.

After the cutter 104 has been removed from the cutter holder 12, the eject pin 30 is removed from the cutter holder 12, and the cutter holder 12 is inverted so that the lower end portion 12a is positioned upward. The magnet 18 is moved to the upper end portion 14d side to attract the magnet 20 to the magnetic pipe 16 again.

Since the magnetic pipe 16 is positioned with respect to the holder member, the magnet 20 is
Since the pivot bearing 18 that supports the cutter 104 can be positioned simply by suctioning the cutter 6, the new cutter can be easily attached without requiring a complicated positioning operation.

The eject pin 30 does not need to be made of a magnetic material. However, if the eject pin 30 is made of a magnetic material, the magnet 20 will be attracted to the eject pin 30. Thus, the magnet 20 is attached to the eject pin 30.
When the eject pin 30 is pulled out from the cutter holder 12 when the eject pin 30 is pulled out in the direction of the arrow B, the magnet 20 adsorbed on the eject pin 30 is also pulled up together with the lower end 16a of the magnetic pipe 16.
Will be adsorbed. Therefore, preparation for mounting a new cutter can be performed without performing the operation of inverting the cutter holder 12 as described above.

When the eject pin 30 is formed of a magnet, the eject pin 30 can be adsorbed on a base portion of a cutting plotter made of a magnetic material without storing the eject pin 30 separately. Loss of the eject pin 30 can be prevented beforehand, and quick work can be expected.

In the above embodiment, after the cutter 104 has been extracted from the cutter holder 12, the cutter holder 12 is not inverted and the like.
By simply attaching a new cutter to the cutter holder 12, a new cutter can be attached without performing a complicated positioning operation.

That is, after inserting a new cutter into the miniature bearing 108, the pivot bearing 18 and the magnet 20 are pressed by the base end of the new cutter, and the magnet 20 is attracted to the magnetic pipe 16. 20, pivot bearing 1
8 and a new cutter may be positioned.

As shown in FIG. 2B, the eject pin 32 may be formed so as to protrude from the base 40 of the cutting plotter. In this case, the cutter 104 can be moved in the direction of arrow D simply by inverting the cutter holder 12 and inserting it into the eject pin 32 and moving the same in the direction of arrow C. It can be carried out.

FIGS. 3 (a) to 3 (c) show a second embodiment of the cutter holder according to the present invention.
The second embodiment is different from the first embodiment in that the magnet and the eject pin are integrated.

That is, in the second embodiment, the magnet 20
And the eject pin 34 are integrated. When the magnet 20 and the eject pin 34 are integrated, the magnet 20 and the eject pin 34 may be bonded and fixed to each other, or the eject pin 34 may be formed of a magnetic material to form the magnet 20. May be adsorbed.

In the second embodiment, since the magnet 20 and the eject pin 34 are always integrated, even when the cutting pen 10 is still attached to the cutting plotter main body, the eject pin 34 is moved in the direction indicated by the arrow E. By pressing the cutter holder 1
2, the cutter 104 can be instantaneously extracted.

Also, the eject pin 34 and the magnet 2
When the eject pin 34 is pulled up in the direction of arrow F, the magnet 20 integrated with the eject pin 34 is also pulled up and is attracted to the lower end 16 a of the magnetic pipe 16. become. For this reason, preparation for mounting a new cutter can be easily performed.

Since a spacer (winding bush) generally used conventionally can be used as the magnetic pipe, it is not necessary to newly manufacture the magnetic pipe, so that the cost can be reduced.

Further, since the magnetic pipe may be formed of a magnetic material to which the magnet 20 can be attracted, a structure may be employed in which a spring pin or the like is press-fitted.

[0058]

Since the present invention is configured as described above, it has the following effects.

Since the magnetic tubular member and the magnet are attracted only by the magnetic force of the magnet, the rod-shaped body penetrating the magnetic tubular member is operated from the outside to separate the magnet from the magnetic tubular member against the magnetic force of the magnet. The magnet can be pressed and moved to separate. In this way, the magnet is separated from the magnetic tubular member and moved, so that the cutter gradually projects from the blade member from the holder member. The cutter can be quickly removed from the holder member without damaging the cutter.

In particular, when the cutter having a long blade for a thick sheet, in which the protruding portion from the cutter holder has only the blade portion, is removed, it is possible to reliably prevent the blade from touching the blade edge, so that it is extremely safe. A sampling operation can be performed.

Further, since the magnet having the pivot bearing integrally supporting the cutter is attracted to the magnetic tubular member positioned and fixed at a predetermined position of the holder member, the pivot bearing can be positioned. The positioning of the cutter supported by the pivot bearing can be performed extremely accurately with respect to the cutter holder.

Accordingly, in order to separate the magnetic tubular member and the magnet, the rod-shaped body penetrating the magnetic tubular member is eliminated, and the magnet is attracted to the tubular member again by a magnetic force. Without having to do so, the cutter can be accurately positioned relative to the cutter holder and the cutting pen reconfigured.

Further, since the number of constituent parts is small and the whole structure is extremely simple, the manufacturing cost can be greatly reduced.

[Brief description of the drawings]

FIG. 1 is a semi-longitudinal sectional view showing a cutting pen constituted by a cutter holder according to a first embodiment of the present invention.

FIGS. 2A and 2B are cross-sectional explanatory views showing an operation of extracting a cutter from a cutter holder, wherein FIG. 2A is a case where an eject pin separately configured to be separable is used, and FIG.
Is a case where an eject pin protruded from a base portion of a cutting plotter or the like is used.

3A and 3B are cross-sectional explanatory views of a cutting pen constituted by a cutter holder according to a second embodiment of the present invention, wherein FIG. 3A shows a normal use state, and FIG. 3B shows a state in which an eject pin is pressed. (C) shows a state in which the cutter from the cutter holder is pulled out by a finger or the like.

FIG. 4 is a half-long sectional explanatory view showing a cutting pen constituted by a conventional cutter holder.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Cutting pen 12 Cutter holder 12a Lower end part 14 Holder member 14a Inner peripheral part 14b Lower end part 14c Concave part 14d Upper end part 14e Opening part 16 Magnetic pipe 16a Lower end part 18 Pivot bearing 18a Outer peripheral part 20 Magnet 20a Outer peripheral part 30 Eject pin 32 Eject Pin 34 Eject pin 104 Cutter 104a Tip 104b Blade 104c Base 104d Body 108 Miniature bearing

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B26D 7/26 B26D 1/04 B26D 5/00 B43L 13/00

Claims (2)

(57) [Claims] 1. A cutter having a blade formed at one end thereof is attracted by a magnetic force of a magnet, and the one end is protruded by a predetermined length in an axial direction, and is rotatable around an axis. In a cutter holder to be supported, a cylindrical holder member, a magnetic tubular member inserted into the holder member and positioned at a predetermined position, and one end of the magnetic tubular member inserted into the holder member A magnet that is attracted to the portion by magnetic force, and is inserted into the holder member and is integrally attached to the magnet on the opposite side of the magnetic tubular member, and the cutter is rotatable around the axis by the magnetic force of the magnet. A cutter holder having a supporting pivot bearing. 2. The cutter holder according to claim 1, wherein the magnet has a magnet moving member that penetrates the magnetic tubular member and protrudes outside the holder member.