JPH0639792A - Cutter holder - Google Patents

Abstract

PURPOSE:To perform easy and safe work to pull out a cutter from a cutter holder without increasing a manufacturing cost and to perform the rapid work without damaging a cutting edge. CONSTITUTION:A magnetic pipe 16 is securely positioned at the inner peripheral part 14a of a cylindrical holder part 14 and a magnet 20 is attracted to the lower end part 16a of the magnetic pipe 16. A pivot bearing 18 to support a cutter 104 rotatably around an axis is attracted to the magnet 20.

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 cutter holder for a cutting pen in a cutting plotter.

[0002]

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

In the cutting pen used in such a cutting plotter, when the cutter is attached to the cutter holder, the sheet can be cut smoothly so that a predetermined length (extremely short length) can be cut from the cutter holder. It is attached so that the tip of the blade of the cutter is projected so that the tip of the blade of the cutter can maintain a predetermined height with respect to the reference surface. 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 smoothly cut the sheet, it is necessary to have a structure in which the cutter is held by the cutter holder so as to be rotatable about its axis. .

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

The cutter holder 102 has a cylindrical holder member 106, and an inner peripheral portion 106a of the holder member 106 has a female screw portion having a starting end portion 106d near the opening 106c of the upper end portion 106b. 106e is formed. Then, the female screw portion 106e located on the opposite side of the opening portion 106c is preliminarily positioned and set at a predetermined position at an axially substantially intermediate portion which is advanced from the terminal end portion 106f of the female screw portion 106e toward the lower end portion 106g of the holder member 106. The stepped portion 106h is formed so as to project to the inner diameter side.

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

Then, the holder member 10 as described above.
To configure the cutter holder 102 from 6 and attach the cutter 104 to the cutter holder 102 while positioning the cutter 104 in the axial length direction and rotatably around the shaft center, as described below. It was done by various work processes.

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

The outer peripheral portion of the set screw 116 is
A male screw portion 116a that is screwed 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 inserted into the opening of the upper end portion 106b of the holder member 106. From 106c, the pivot bearing 112 is made into the head, and it inserts in the holder member 106.

Then, the male screw portion 116 of the set screw 116.
a and the female screw portion 106e of the holder member 106 are screwed to each other until the lower end portion 110a of the pivot holder 110 hits the stepped portion 106h of the holder member 106.
The set screw 116 is screwed into the holder member 106. In this way, the set screw 11 is positioned with respect to the holder member 106 while positioning the pivot holder 110 in the axial direction.
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 tip portion 104a and the blade portion 104 are formed.
Cutter 1 made of magnetic material processed and attached to b
04 will be inserted. And this cutter 10
4, the base end portion 104c is rotatably supported around the center of the pivot bearing 112, and the tip end portion 104a is inserted into the miniature bearing 108. It is made to adsorb to the pivot bearing 112 and supported in the cutter holder 102.

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

Therefore, the cutting pen 10 shown in FIG.
In 0, since the pivot holder 110 is positioned at a predetermined axial position with respect to the holder member 106, the pivot bearing 112 fixed to the pivot holder 110 is axially fixed with respect to the holder member 106. It will be positioned. Therefore, the cutter 10 rotatably supported by the pivot bearing 112
4 is positioned at a predetermined position in the axial direction with respect to the cutter holder 102.

Since the cutter 104 is held in the cutter holder 102 by being attracted by the magnet 114 via the pivot bearing 112, the cutter 104 is prevented from falling from the cutter holder 102, and The cutter 104 is rotatably arranged around the axis of the cutter holder 102.

Then, the cutting pen 100 thus constructed is attached to the cutting plotter body to cut a sheet or the like 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 of the blade 104b. The cutter 104 so that the cutter holder 10
Remove from 2 and insert another cutter into the cutter holder 1
It is necessary to frequently perform the work of attaching to 02.

At the time of exchanging the cutter 104, the tip portion 104a of the cutter 104 hardly protrudes from the lower end portion 106g of the holder member 106 of the cutter holder 102 (as described above, normally,
Only about 3 mm protrudes. ), The cutter 104 could not be pulled out from the cutter holder 102 by grasping the tip portion 104a with fingers. For this reason,
The tip 104a is gripped by using tweezers, and the cutter 104 is extracted from the cutter holder 102.

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

Therefore, as described above, the work of pulling out the cutter 104 from the cutter holder 102 must be performed by gripping the tip portion 104a of the cutter 104 protruding from the lower end portion 106g of the holder member 106 using the tweezers. did not become.

[0022]

However, when the cutter is pulled out 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 provided by the tapered grip portion of the tweezers. Since it has to be gripped, there is a problem that it is very difficult to grip and there is a risk of accidentally damaging the blade.

On the other hand, unlike the cutter holder having the structure shown in FIG. 4, the cutter holder is formed in a two-divided structure, and the cutter is positioned between the two divided cutter holders. A cutter holder is known in which and are integrally connected and fixed using screws.

In the cutter holder having such a structure, it is not necessary to pull out the cutter from the cutter holder by using the tweezers because the cutter holder can be easily disassembled by removing the screw. However, when the cutter holder is divided, the cutter may be accidentally dropped, and the structure of the cutter holder itself becomes complicated, which causes an increase in manufacturing cost.

The present invention has been made in view of the above-mentioned various problems of the prior art, and the object thereof is to prevent an increase in manufacturing cost.
An object of the present invention is to provide a cutter holder capable of easily and safely removing the cutter from the cutter holder and quickly performing it without damaging the blade edge.

[0026]

In order to achieve the above object, the cutter holder according to the present invention attracts a cutter having a blade portion at one end thereof by a magnetic force of a magnet, and In a cutter holder that projects axially by a predetermined length and is rotatably supported about an axis, a cylindrical holder member and a magnetic tubular member inserted into the holder member and positioned at a predetermined position. A magnet that is inserted into the holder member and that is attracted to one end of the magnetic tubular member by magnetic force; and a magnet that is inserted into the holder member and is integrated with the magnet on the opposite side of the magnetic tubular member. And a pivot bearing that supports the cutter rotatably around the axis by the magnetic force of the magnet. It is obtained by the.

[0027]

[Function] The magnetic tubular member and the magnet are attracted only by the magnetic force of the magnet.
The pivot bearing is attached integrally. The cutter is rotatably supported by the pivot bearing by the magnetic force of the magnet.

Therefore, the magnet is pressed from the outside of the holder member on the side opposite to the side where the blade portion of the cutter is located by the rod-shaped body penetrating the magnetic tubular member, and the magnet is removed from the magnetic tubular member against the magnetic force of the magnet. Move the magnet to separate. In this way, by separating the magnet from the magnetic tubular member and moving, the cutter supported by the pivot bearing integrated with the magnet is gradually projected from the holder member. For this reason, it is possible to easily, safely, and swiftly remove the cutter from the holder member by grasping the body portion where the blade portion of the cutter is not formed with fingers.

Further, the pivot bearing is positioned by adsorbing a magnet integrally attached with a pivot bearing for supporting the cutter to the magnetic tubular member positioned and fixed at a predetermined position of the holder member. Therefore, even if the rod-shaped body for separating the magnet from the magnetic tubular member is eliminated and the magnet is re-adsorbed to the magnetic tubular member by the magnetic force, the pivot bearing integrated with the magnet is attached to the holder member. Will be positioned accurately. 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, it may be attracted by the magnetic force of the magnet or may be fixed by adhesion or the like.

[0031]

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

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

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

Holder member 14 of the cutter holder 12
Is an inner peripheral portion 14 whose inner diameter is extended in the axial direction to have substantially the same diameter.
It is a substantially cylindrical member formed so as to have a.

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

Further, at the lower end of the magnetic pipe 16,
A magnet 20 that attracts the pivot bearing 18 by magnetic force is attracted to 6a by magnetic force.

In order to arrange the pivot bearing 18 and the magnet 20 in the holder member 14 as described above, the magnet 20 is inserted through the opening on the lower end portion 14b side of the holder member 14 and the magnetic pipe 16 is inserted. The lower end portion 16a may be attracted, and the pivot bearing 18 may be similarly inserted and the magnet 20 may be attracted. At this time, if the pivot bearing 18 is attracted to the magnet 20 in advance and the magnet 20 integrated with the pivot bearing 18 is inserted into the holder member 14, the assembling work becomes easier.

The pivot bearing 18 and the magnet 20 are dimensioned so that the outer peripheral portions 18a and 20a are in circumferential contact with the inner peripheral portion 14a of the holder member 14, respectively. It can prevent backlash.

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. The cutter holder 12 is configured by arranging.

Cutter holder 12 thus constructed
Is the pivot bearing 18 that supports the cutter 104.
Is integrated with the magnet 20, and the magnet 20 is attracted to the magnetic pipe 16 positioned and fixed to the inner peripheral portion 14 a of the holder member 14. For this reason,
The pivot bearing 18 is also attached to the holder member 14,
The positioning of the cutter 104 with respect to the cutter holder 12 will be achieved.

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

With the above-mentioned structure, the cutter 104 is inserted into the miniature bearing 108 to obtain the cutter 10.
The base end portion 104c of No. 4 is supported by the pivot bearing 18. Cutter 1 supported by 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.

Cutting pen 10 constructed in this way
2A, the ejector pin 30 is inserted from the opening 14e located on the upper end 14d side of the holder member 14 and pressed in the direction of arrow A to replace the magnet 20 as shown in FIG. Is pushed toward the lower end portion 14c of the holder member 14 to move. That is, the magnet 2
The magnet 20 is separated from the magnetic pipe 16 against the magnetic force to be attracted to the magnetic pipe 16 of 0, and is moved toward the lower end portion 14c of the holder member 14.

At this time, since the pivot bearing 18 is attracted to the magnet 20 by the 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 way
By grasping d with fingers, the cutter 104 can be easily and safely withdrawn quickly from the cutter holder 12.

After the cutter 104 is pulled out from the cutter holder 12, the eject pin 30 is pulled out from the cutter holder 12 and the cutter holder 12 is inverted so that the lower end portion 12a is located above the magnet 20 and the pivot bearing. 18 is moved to the upper end 14d side, and the magnet 20 is again attracted to the magnetic pipe 16.

Since the magnetic pipe 16 is positioned with respect to the holder member, the magnet 20 is attached to the magnetic pipe 1.
Since the pivot bearing 18 that supports the cutter 104 can be positioned by simply adsorbing it to the cutter 6, a new cutter can be easily attached without requiring complicated positioning work.

The eject pin 30 does not have to be a magnetic material, but if it is made of a magnetic material, the magnet 20 is attracted to the eject pin 30. In this way, the magnet 20 is attached to the eject pin 30.
When the eject pin 30 is pulled out in the direction of the arrow B when the eject pin 30 is pulled out from the cutter holder 12, the magnet 20 attracted to the eject pin 30 is also pulled up, and the lower end portion 16a of the magnetic pipe 16 is pulled.
Will be adsorbed on. Therefore, it is possible to prepare to attach a new cutter without the need to perform the operation of inverting the cutter holder 12 as described above.

When the eject pin 30 is made of a magnet, the eject pin 30 can be adsorbed to the base of the cutting plotter made of a magnetic material without separately storing it. It is possible to prevent the ejection pin 30 from being lost and to expect quick work.

In the above embodiment, after the cutter 104 is pulled out from the cutter holder 12, the cutter holder 12 is not inverted and the like.
Even if only a new cutter is attached to the cutter holder 12, a new cutter can be attached without performing a complicated positioning work.

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 portion of the new cutter to attract the magnet 20 to the magnetic pipe 16, thereby making the magnet 20, pivot bearing 1
8 and a new cutter may be positioned.

Further, as shown in FIG. 2B, the eject pin 32 may be formed so as to project on the base portion 40 of the cutting plotter or the like. In that case, the cutter 104 can be moved in the direction of the arrow D simply by turning the cutter holder 12 upside down, inserting it into the eject pin 32, and moving it in the direction of the 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
The eject pin 34 is integrated with the eject pin 34. When the magnet 20 and the eject pin 34 are integrated, the eject pin 34 and the eject pin 34 may be adhered and fixed together. May be adsorbed on.

In the second embodiment, since the magnet 20 and the eject pin 34 are always integrated, the eject pin 34 can be moved in the direction of arrow E even when the cutting pen 10 is still attached to the cutting plotter body. Cutter holder 1 by pressing on
The cutter 104 can be instantly pulled out from 2.

Also, the eject pin 34 and the magnet 2
Since 0 and 0 are integrated, when the eject pin 34 is pulled up in the direction of the arrow F, the magnet 20 integrated with the eject pin 34 is also pulled up and attracted to the lower end portion 16a of the magnetic pipe 16. become. Therefore, preparation for attaching a new cutter can be easily performed.

As the magnetic pipe, since a spacer (rolling bush) that has been generally used in the past can be used, it is not necessary to newly manufacture it, so that the cost can be reduced.

Further, since the magnetic pipe may be made of a magnetic material capable of attracting the magnet 20, it may have a structure in which a spring pin or the like is press-fitted.

[0058]

Since the present invention is constructed 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, and the magnet is removed from the magnetic tubular member against the magnetic force of the magnet. The magnets can be pressed and moved to separate. In this way, by separating the magnet from the magnetic tubular member and moving it, the cutter gradually protrudes from the blade member from the holder member, so that the body of the cutter can be easily and safely gripped by the fingers. The cutter can be quickly removed from the holder member without damaging the blade.

In particular, when a cutter having a long blade length for a thick sheet such as a protruding portion from the cutter holder has only a blade tip portion, the blade tip is surely prevented from coming into contact with the blade, so that it is extremely safe. It is possible to perform extraction work.

Since the magnet having the pivot bearing for supporting the cutter integrally attached thereto is attracted to the magnetic tubular member positioned and fixed at the predetermined position of the holder member, the pivot bearing can be positioned. The cutter supported by the pivot bearing can be positioned extremely accurately with respect to the cutter holder.

Therefore, 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 magnetically attracted to the tubular member again to perform a complicated positioning operation. The cutter can be accurately positioned with respect to the cutter holder and the cutting pen reconfigured without the need to perform.

Furthermore, since the number of constituent parts is small and the overall structure is extremely simple, it is possible to significantly reduce the manufacturing cost.

[Brief description of drawings]

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

FIG. 2 is a cross-sectional explanatory view showing an operation of extracting the cutter from the cutter holder, where (a) is a case where an eject pin that is separably configured is used, and (b).
Shows the case where the eject pin formed on the base of the cutting plotter is used.

3A and 3B are cross-sectional explanatory views of a cutting pen configured by a cutter holder according to a second embodiment of the present invention, 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 being pulled out by fingers or the like.

FIG. 4 is a semi-longitudinal cross-sectional explanatory view showing a cutting pen configured by a conventional cutter holder.

[Explanation of symbols]

 10 Cutting Pen 12 Cutter Holder 12a Lower End 14 Holder Member 14a Inner Perimeter 14b Lower End 14c Recess 14d Upper End 14e Opening 16 Magnetic Pipe 16a Lower End 18 Pivot Bearing 18a Outer Part 20 Magnet 20a Outer Part 30 Eject Pin 32 Eject Pin 34 Eject pin 104 Cutter 104a Tip portion 104b Blade portion 104c Base end portion 104d Body portion 108 Miniature bearing

Claims (2)

[Claims] 1. A cutter having a blade formed at one end thereof is attracted by a magnetic force of a magnet to project the one end axially by a predetermined length, and is rotatable about an axis. In the supporting cutter holder, a cylindrical holder member, a magnetic tubular member that is inserted into the holder member and is positioned at a predetermined position, and an end of the magnetic tubular member that is inserted into the holder member And a magnet that is attracted by a magnetic force to the holder, is inserted into the holder member, and is integrally attached to the magnet on the opposite side of the magnetic tubular member, and the magnetic force of the magnet allows the cutter to rotate about its axis. 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 projects to the outside of the holder member.