JPH0852685A - Cutting pen - Google Patents

Abstract

PURPOSE:To perform proper cutting without coming off from a holder part of a cutter during cutting, by arranging in the holder part a chuck mechanism provided with a spring of energizing to a tapered hole part a ball type chuck of holding the cutter. CONSTITUTION:A chuck outer cylinder 31, having a tapered hole part 35 decreasing a diameter toward downward, is provided in an internal peripheral surface lower part, to internally mount a chuck mechanism 34 on the chuck outer cylinder 31. This chuck mechanism 34 is constituted of an almost cylindrical ball type chuck 32, arranged vertically movably in a condition of preventing coming off from a lower end part to include a plurality of chuck balls 39 interposed between peripheral surfaces of the tapered hole part 35 and a cutter 45, and of a spring 33 energizing the chuck 32 downward the tapered hole part 35. The chuck mechanism 34 is arranged in a holder part 21, to hold the cutter 45 fastened by energizing the ball type chuck 32 downward by the spring 33.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting pen for rotatably supporting a detachable cutter, and more particularly to a cutting pen used for a cutting plotter for cutting a sheet or the like into an arbitrary shape.

[0002]

2. Description of the Related Art Conventionally, a sheet has been cut into a shape such as a character or a pattern and attached to a window of a store or the like, and a cutting plotter is used for cutting such a sheet. This cutting plotter has
A cutting pen with a cutter is provided,
The sheet is cut by moving the cutting pen forward, backward, leftward and rightward while pressing the cutter blade edge of the cutting pen against the sheet.

As such a cutting pen, the present applicant has developed and already applied for the one shown in FIG. That is, in the figure, reference numeral 1 denotes a cylindrical holder portion in which a flange portion 2 is provided so as to project on a circumference of a substantially central portion of a body portion, and a groove portion 4 is provided along a circumference on an upper side of a lower diameter portion 3 on the lower side. And an O-ring 5 is installed in the groove 4. Then, a threaded portion 6 is engraved on the outer peripheral surface of the small-diameter portion 3 below the groove portion 4, and the threaded portion 6 is engraved with a threaded portion 7 on the inner peripheral surface thereof. Are screwed together. Reference numeral 9 is a projecting hole formed at the center of the bottom of the cap portion 8.

Reference numeral 10 denotes a hole formed in the center of the holder 1, a bearing 11 is press-fitted and fixed to the inner peripheral surface of the lower end of the holder 1, and a cylindrical spring pin 12 is provided on the inner peripheral surface of the upper side. It is fixed. 13 is the spring pin 1
2 is a columnar magnet disposed on the lower side, and a pivot bearing 14 is magnetically attached to the lower side of the magnet 13. A rod-shaped cutter 15 is rotatably supported by the pivot bearing 14 and the bearing 11. The cutter 15 has a conical upper end portion. With the conical portion positioned at the center of the pivot bearing 14, the lower side is inserted through the center hole of the bearing 11, and the blade tip is positioned at the cap portion 8. Is projected from the lower end of the. Reference numeral 16 denotes a pressing pin for inserting the cutter, which is inserted through the spring pin 12 and placed on the upper surface of the magnet 13.

The magnet 13 is attracted to the spring pin 12 by a magnetic force and positioned below the spring pin 12, and the pivot bearing 14, the cutter 15 and the pressing pin 16 are attracted by a magnetic force, respectively. Hold in position. Further, the cap portion 8 can change the amount of protrusion of the blade tip 17 of the cutter 15 by rotating, and the O-ring 5 prevents the cap portion 8 from rotating during use, The amount of protrusion of the cutting edge 17 is kept constant.

[0006] When the cutting pen is used,
It is attached to a pen carriage of a plotter (not shown) and moves in the X-axis and Y-axis directions together with the pen carriage.
It is designed to cut sheets.

[0007]

However, it is necessary to cut a plurality of lines because the pattern and the like in the cutting as described above often have complicated cutting lines.
For this reason, when cutting, it is possible to cut one line, raise the cutting pen once to separate it from the sheet, move it to a predetermined position, and then drop it again onto the sheet to continue cutting. It is repeated. In such a case, if a thick sheet or an adhesive sheet is used as the cutting sheet, the blade tip 17 of the cutter 15 may be caught or stuck to the sheet cut when the cutting pen is raised. The cutter 15 may come off the holder part 1.
As a result, when the cutting pen is moved up and moved to the next cutting position, the cutter 15 moves while being pulled, which may cut a portion of the sheet that should not be cut or damage the sheet. Is occurring.

The present invention has been made in view of the above circumstances, and the cutter is clamped or stuck to a sheet regardless of the type of sheet used, such as a thick sheet or an adhesive sheet. It is an object of the present invention to provide a cutting pen capable of performing proper cutting without coming off from the holder portion.

[0009]

In order to achieve the above object, in the cutting pen of the present invention, a chuck outer cylinder having a tapered hole portion having a smaller diameter toward the lower part of the inner peripheral surface, and the above taper. A holder is provided with a chuck mechanism composed of a ball-type chuck having a plurality of chuck balls that move along the hole and hold the cutter, and a spring that urges the ball-type chuck toward the tapered hole. A cutter, which is disposed inside the unit and has a cutting edge formed on the lower portion, is rotatably held in a state of being inserted into the chuck mechanism.

In order to obtain a stable rotation of the cutter, a support member for supporting the upper end of the cutter, a chuck mechanism, and a ball bearing for holding the lower side of the cutter barrel are held in the holder in order from the top of the holder. It may be arranged in the.

Further, in order to adjust the blade amount of the cutter protruding from the protruding hole provided at the lower end of the holder,
The blade edge adjustment knob may be installed above the support member, the blade edge adjustment knob may be screwed into the holder portion, and the blade edge adjustment knob may be rotated to vertically move the support member.

Furthermore, in order to allow the cutter to move when removing the cutter or adjusting the amount of blade edge of the cutter protruding from the lower end of the holder portion, a chuck release lever is provided on the ball type chuck so that the holder can be moved. It is attached so as to protrude from the part.

[0013]

[Function] The cutting pen configured as described above is
Since the cutter is sandwiched by the chuck balls,
In use, the cutter rotates along a complicated cutting line to cut the sheet into a desired pattern. Also,
When using a thick sheet or adhesive sheet, etc., when raising the cutting pen, the cutter may be caught in the sheet cut or stuck to the sheet and pull out the cutter from the holder part. Even if works, if the chuck ball holding the cutter tries to move along with the downward movement of the cutter, the cutter receives a stronger holding force from the chuck ball trying to move downward along the tapered hole. Becomes,
The cutter will not be pulled out of the holder, and the blade edge of the cutter will rise away from the sheet.

Further, in order to reduce the backlash of the cutter during cutting, the cutter may be supported by a supporting member and a ball bearing and may be sandwiched by a chuck mechanism.

Further, when the blade tip adjusting knob screwed to the holder portion is rotated in one direction, for example, the blade tip adjusting knob moves downward with respect to the holder. Therefore, the supporting member installed at the lower end of the blade adjustment knob also moves downward, and the blade edge of the cutter supported by this supporting member is the distance that the supporting member moves from the projecting hole provided at the lower end of the holder part. It becomes even more prominent. Also,
When the blade tip adjustment knob is rotated in the other direction, the support member rises, and the blade tip amount of the cutter protruding from the protrusion hole decreases.

Furthermore, when the chuck release lever attached to the ball type chuck is raised, the ball type chuck is raised against the spring, the ball is released from the cutter, and the cutter can be moved downward. become. Therefore, when the cutter is attached or detached or when the amount of the blade edge of the cutter protruding from the protrusion hole provided at the lower end of the holder is adjusted, the cutter can be moved smoothly. Next, the present invention will be described in detail based on examples.

[0017]

1 shows a cutting pen according to an embodiment of the present invention. In the figure, reference numeral 21 denotes a cylindrical holder portion in which a flange portion 22 is provided so as to project on the circumference of the substantially central portion of the body portion, and a screw portion 24 is engraved on the outer peripheral surface of the lower diameter portion 23. The threaded portion 24 and the threaded portion 2 on the inner peripheral surface
A cap portion 26 having a bottomed cylindrical shape in which 5 is engraved is screwed. Reference numeral 27 is a projecting hole formed in the center of the bottom of the cap portion 26, and 28 is a projecting hole formed in one of the lower side portions of the cap portion.

Reference numeral 29 is a hole formed in the center of the holder 21, and a protrusion 30 is formed on the inner surface of the center of the holder along the inner circumference. A chuck mechanism 34 including a chuck outer cylinder 31, a ball chuck 32, and a spring 33 is mounted on the inner peripheral surface 29a below the protruding portion 30. The chuck outer cylinder 31
Has a taper hole portion 35 having a smaller diameter toward the lower part of the inner peripheral surface, and is press-fitted and fixed to the inner peripheral surface 29a of the hole portion 29. The ball type chucks 32 are arranged in the chuck outer cylinder 31, and four ball chucks 32 are arranged at equal intervals along the circumference of a substantially central portion of a flanged cylindrical piece 37 having a flange portion 36 formed on the outer periphery of the upper portion. The small hole 38 is bored, and the chuck ball 39 is loosely fitted in the small hole 38. Further, the lower end portion of the flanged cylindrical piece 37 projects downward from the lower end opening of the chuck outer cylinder 31, and one end of the lower end portion of the chuck release lever 4 is protruded from the lower projecting hole 28 of the cap portion 26.
0 is attached. The spring 33 is arranged between the collar portion 36 of the ball chuck 32 and the protrusion 30 of the holder portion 21, and the ball chuck 32 is attached to the chuck outer cylinder 31.
It is pressed against the taper hole portion 35.

Further, a screw portion 41 is engraved on the outer peripheral surface on the upper side of the hole 29, and a cutting edge adjusting knob 43 having a screw portion 42 engraved on the outer peripheral surface is screwed into the screw portion 41. ing. Reference numeral 44 denotes a pivot bearing installed at the lower end of the blade edge adjusting knob 43. This pivot bearing 4
4 and the chuck mechanism 34, a rod-shaped cutter 45
Is rotatably supported. This cutter 45
Has an upper end 46 formed in a conical shape.
6 is positioned in the center of the pivot bearing 44, the lower side is inserted through the center hole of the chuck mechanism 34,
The blade tip 47 is projected from the projecting hole 27 of the cap portion 26.

According to this structure, since the ball chuck 32 is constantly pressed against the tapered hole portion 35 of the chuck outer cylinder 31 by the spring 33, each chuck ball 39 moves toward the cutter 45. The cutter 45 is sandwiched. Since the chuck balls 39 are rotatable in the circumferential direction even when the cutter 45 is sandwiched by the chuck balls 39, the cutter is rotatably held.
Also, when the chuck release lever 40 is pushed up in the direction of the flange portion 22 by hand, the ball type chuck 32 moves upward along the taper hole portion 35 while opening the cutter 45 to lower the holding force on the cutter 45. become. When the hand is released from the chuck release lever 40, the ball type chuck 32 is pushed down to its original position by the spring 33, and holds the cutter 45 again. Further, the cutting edge adjustment knob 43 is rotated by twisting the head portion 43a thereof by hand to rotate the pivot bearing 44.
The position of can be changed. As a result, the pivot bearing 44 is positioned between the lower end of the screw portion 41 and the upper end of the protruding portion 30, and the blade edge 47 of the cutter 45 can be protruded from the protruding hole 27 of the cap portion 26 by a predetermined amount.

In use of the cutting pen 20 having the above-described structure, first, the blade tip adjusting knob 43 is rotated while the chuck release lever 40 is being pushed up to rotate the blade tip adjusting knob 43 so that the protruding amount of the blade tip 47 is increased. It is attached to the pen carriage of the plotter (not shown) when it is adjusted and the protrusion amount becomes appropriate. At this time, the flange portion 22 of the holder portion 21 is held by the holding portion of the carriage. Then, in that state, the cutting plotter is started to cut the sheet (not shown).

Cutting is performed according to a program provided in advance in the cutting plotter, during which the cutting pen 20 moves together with the carriage in the X-axis and Y-axis directions and one cutting line. After cutting the sheet, it is moved upward (Z-axis direction), moved to a predetermined position, and then lowered again onto the sheet to perform cutting.

During cutting, the cutting edge 20 of the cutter 45 is sandwiched between the cut edges of the sheet, and the cutting pen 20 is raised in this state.
A force for pulling the cutter 45 downward from 1 is generated. However, when the cutter 45 tries to move downward, the chuck balls 39 pressed against the cutter 45 also try to move downward together with the cutter 45. At this time, since the force of the chuck ball 39 moving downward is the force of moving the chuck ball 39 to the chuck central portion by the tapered hole portion 35, a stronger holding force for the cutter 45 is generated, and the cutter 45 is generated. Is not pulled downwards. As a result, the cutter 45 separates from the sheet and moves upward together with the holder portion 21.

To replace the cutter 45 when it is damaged or worn out, first, the chuck release lever 40 is pushed up to release the tightening of the cutter 45 by the chuck, and then the blade adjustment knob 43 is rotated and the blade tip 47 is capped. An appropriate amount is pushed out from the projecting hole 27 of the portion 26, and the blade edge 47 is grasped with tweezers or the like to hold the cutter 45 in the holder portion
Remove from 1. Next, attach a new cutter to the above-mentioned protruding hole 2
7 into the ball-type chuck 32. Then, the blade tip adjustment knob 43 is rotated to adjust the protrusion amount of the blade tip.

As described above, in the cutting pen 20 according to the above-described embodiment, the cutter 4 which is downwardly inserted into the holder portion 21.
A chuck mechanism 34 for restricting the movement of No. 5 is arranged. Therefore, like the conventional example, when raising the cutting pen, the cutter slips out of the holder part, and when the cutting pen is lowered next time, the blade tip of the cutter does not go to a predetermined position and the sheet is damaged. No more mistakes in cutting. As a result, the type of sheet to be cut is not limited by the thickness and characteristics of the sheet.

Further, unlike the conventional example, since the cutter is not held by a magnet, it is also possible to use a cemented carbide blade formed of a magnetic material, which limits the type of cutter. Disappears.

FIG. 2 shows a cutting pen 50 according to another embodiment of the present invention. In this cutting pen 50, the lengths of the chuck outer cylinder 61 and the spring 63 are set shorter than those of the cutting pen 20 in FIG. 1, so that the chuck release lever 70, which is positioned above, protrudes from the protruding hole 54. However, it is provided not in the cap portion 57 but in the small diameter portion 53 of the holder portion 51. Further, a ball bearing 71 for supporting the lower side of the body of the cutter 45 is press-fitted into the inner periphery of the lower end of the hole 59 formed in the holder 51. The other configuration is the same as that of the cutting pen shown in FIG. Therefore, the same reference numerals are given to the same portions.

In the cutting pen 50 constructed as described above, the cutter 45 is supported by the pivot bearing 44 and the ball bearing 71 with the central axis kept constant, and is rotatably held by the ball chuck 32. Therefore, stable rotation can be obtained. The operation and effect other than the above are the same as those of the above-described embodiment.

In the above two embodiments, the pivot bearing 44 is used as a supporting member for supporting the upper end of the cutter.
However, it may be supported by using a ball bearing. In this case, the upper end of the cutter comes into contact with the lower end of the cutting edge adjustment knob, and the upper peripheral surface of the cutter is supported by the ball bearing. Further, a pivot may be formed on the contact surface (when the blade tip adjusting knob is not used) of the holder portion with which the lower end portion of the blade tip adjustment knob or the upper end portion of the cutter abuts to support the upper end portion of the cutter.

[0030]

As described above, the cutting pen of the present invention has a chuck outer cylinder having a tapered hole portion having a smaller diameter in the lower part of the inner peripheral surface thereof, and moves along the tapered hole portion. A chuck mechanism composed of a ball-type chuck having a plurality of chuck balls for sandwiching the cutter and a spring for urging the ball-type chuck to the tapered hole is arranged in the holder. Therefore, it is possible to prevent the cutter from coming out of the holder during cutting. As a result, the cutter does not descend to the predetermined position, and the mistake of cutting or the damage of the sheet does not occur. Further, this allows any sheet such as a thick sheet or an adhesive sheet to be used as a cutting sheet.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a cutting pen according to an embodiment of the present invention.

FIG. 2 is a vertical sectional view of a cutting pen according to another embodiment of the present invention.

FIG. 3 is a vertical cross-sectional view showing a conventional cutting pen.

[Explanation of symbols]

 20,50 Cutting pen 21,51 Holder portion 27 Projection hole 31,61 Chuck outer cylinder 32 Ball type chuck 33,63 Spring 34 Chuck mechanism 35 Tapered hole portion 39 Chuck ball 43 Blade tip adjustment knob 45 Cutter 47 Blade tip 44 Pivot bearing 40, 70 Chuck release lever 71 Ball bearing

Claims (4)

[Claims] 1. A support member for rotatably supporting an upper end portion of a rod-shaped cutter having a cutting edge formed on a lower portion is provided on an upper inner side of a cylindrical holder portion, and the upper end portion of the rod-shaped cutter is supported by the support member. A cutting pen in which the blade edge of the rod-shaped cutter projects from the lower end of the holder when supported by a member, and a chuck having a taper hole portion that has a smaller diameter toward the lower part of the inner peripheral surface. The outer cylinder and the chuck outer cylinder are arranged movably up and down in a state of being prevented from coming off from the lower end of the chuck outer cylinder. A substantially cylindrical ball chuck arranged in parallel around the axis so that the other can contact the peripheral surface of the cutter, and a spring for urging the ball chuck downwardly of the tapered hole. Composed The chuck mechanism is installed in the holder section, and when the ball type chuck is urged downward by the spring, the cutter is tightened, and the ball type chuck is urged upward against the elasticity of the spring. Then, the cutting pen is characterized in that the cutter is released. 2. The cutting pen according to claim 1, wherein a ball bearing for supporting the lower side of the cutter body is arranged below the chuck mechanism inside the holder. 3. The position of the support member can be moved up and down by screwing a blade edge adjusting knob into the upper inner side of the holder portion and rotating the blade edge adjusting knob to move the blade up and down. Cutting pen described. 4. The cutting pen according to claim 1, wherein a chuck release lever for raising the ball chuck to release the tightening to the cutter is attached to the ball chuck so as to protrude from the holder portion.