JP2605876Y2 - 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 which is provided on a cutting plotter for cutting a sheet or the like into an arbitrary shape and holds a cutter in a freely rotatable manner.

[0002]

2. Description of the Related Art Heretofore, a sheet has been cut into a shape such as a character or a pattern and affixed to a window of a store or the like, and a cutting plotter has been used for cutting such a sheet. This cutting plotter
A cutter holder for holding the cutter is provided, and the sheet is cut by moving the cutter holder back and forth and left and right while pressing the tip of the cutter held by the cutter holder against the sheet. Has become.

As such a cutter holder, FIG.
There is something like that shown in That is, in the figure, 1
Is an outer cylinder having a projection hole 2 formed in the bottom and a flange 3 projecting from the body, and 4 is an inner cylinder mounted in the outer cylinder 1. The inner cylinder 4 is provided with a screw 5 engraved on the upper outer peripheral surface and a screw 6 engraved on the upper inner peripheral surface of the outer cylinder 1.
Is screwed into the outer cylinder 1 so as to be vertically movable. Reference numeral 7 denotes a locking ring screwed onto the screw 5 of the inner cylinder 4 on the upper side of the outer cylinder 1. It is designed to be fixed.

The inner cylinder 4 has a knurled knob 8 at its upper end, and a lower inner surface with
Bearings 9 and 10 are provided at intervals vertically. The cutter 11 is press-fitted into both inner rings of the bearings 9 and 10, and is rotatable along a central axis. In this cutter holder, the amount of protrusion of the cutting edge of the cutter 11 is adjusted by rotating the inner tube 4 with respect to the outer tube 1, and when the amount of protrusion of the cutting edge is in an appropriate state, the locking ring 7 is moved. The inner cylinder 4 is fixed by being pressed against the upper edge of the outer cylinder 1.

[0005]

However, when the above-mentioned cutter holder is mounted on a cutting plotter, the body of the outer cylinder 1 is fixedly fastened by a grip portion (not shown) of a carriage provided on the cutting plotter. It is supposed to. Therefore, if the position of the inner cylinder 4 is changed in order to adjust the amount of protrusion of the cutting edge, there is a problem that the distance between the cutter and the surface of the sheet to be cut changes, and the cutter pressure fluctuates. The adjustment is performed by rotating the locking ring 7 and moving it upward, and then adjusting the inner cylinder 4.
, And a complicated operation such as moving the locking ring 7 downward to fix the inner cylinder 4 is also required.

Further, when cutting a sheet with a cutting plotter using such a cutter holder, the lower end of the cutter holder may come into contact with the surface of the sheet, making it difficult to cut the sheet. In particular, when the sheet is cut into a complicated shape, the cut portion may come into contact with a corner of the lower end of the cutter holder, and the sheet and the cutter holder may be entangled. The present invention has been made in view of such circumstances, and it is possible to adjust the protruding amount of the blade edge of the cutter without changing the cutter pressure and by an extremely easy operation, and to reduce friction caused by contact with a sheet. It is an object of the present invention to provide a cutter holder capable of performing good cutting by reducing resistance.

[0007]

In order to achieve the above object, a cutter holder according to the present invention is a cutter holder which is held by a grip portion of a carriage in a cutting plotter, and has a blade portion at a lower end portion. Is held rotatably along the central axis, and the body is
A screw portion is engraved on the outer periphery on the lower side of the substantially cylindrical holder portion held at the bottom , and the blade portion is bored at the center of the bottom portion at the screw portion.
Protruding holes that can advance and retreat, and are provided along the circumference on the outer peripheral surface
Scale and lower end formed into a spherical shape bulging to the lower side
Bottom are screwed bottomed cylindrical cap portion having a, by rotating the cap portion, and to be able to adjust the amount of protrusion of the cap portion bottom surface of the blade portion gutter
Configuration.

[0008]

[Operation] That is, the cutter holder according to the present invention is:
Unlike the conventional example, the cutter 11 is held in the inner cylinder 4, and the inner cylinder 4 is mounted in the outer cylinder 1 fixed to the holding portion of the carriage in a vertically movable state. The cap portion having a projecting hole is attached to the lower side of the substantially cylindrical holder portion for holding through a screw portion. Therefore, the protrusion amount of the blade portion can be adjusted by a simple operation of rotating the cap portion and moving the cap portion up and down. Further, in this case, since the grip portion of the carriage holds the substantially cylindrical holder portion, the positional relationship between the carriage and the cutter (or the sheet and the cutter) does not change, and the sheet is always held at a constant cutter pressure. Cutting can be performed.

A scale is provided on the outer peripheral surface of the cap portion.
Since the adjustment is performed, the projection amount can be set to an accurate amount instead of a visual adjustment, and more accurate adjustment can be performed. Furthermore, the bottom of the cap part swelled to the lower side
Since it is formed on a spherical surface, even if the sheet contacts the lower end of the cutter holder, the frictional resistance can be reduced. As a result, the sheet does not become entangled with the cutter holder, and good cutting can be performed. Also, the blade of the cutter has a cylindrical cap with a bottom.
Protrudes from the projection hole provided at the bottom
Therefore, the sheet floats up near the blade of the cutter
Disappears. This allows the cutting depth for the sheet
Will be kept constant. As a result, for example,
It is said that only the upper part of the layered sheet is cut accurately.
It becomes possible. Next, the present invention will be described in detail based on embodiments.

[0010]

FIG. 1 shows a cutter holder 15 according to an embodiment of the present invention. In the figure, reference numeral 16 denotes a cylindrical holder portion having a flange portion 17 protruding from a substantially central portion of the body portion. The lower portion has a slightly smaller diameter, and a screw portion is formed on the peripheral surface of the smaller diameter portion 18. 19 is engraved, and a groove 20 is provided on the upper side along the circumference. This holder part 16
The center hole 21 is formed with a tapered hole 22 having an upper end with a wide diameter on the upper side and a hole 23 with a wide diameter on the lower end.

An O-ring 24 is provided in the groove 20, and a bearing 25 is press-fitted and fixed in the hole 23. Reference numeral 26 denotes a spring pin fixed to the upper inner peripheral surface of the center hole 21 of the holder 16.
Is a columnar magnet disposed underneath. A pivot bearing 28 is magnetically attached to the lower side of the magnet 27, and a rod-shaped cutter 29 is rotatably supported by the pivot bearing 28 and the bearing 25. The upper end of the cutter 29 is formed in a conical shape, and the lower side of the cutter 29 is inserted through the bearing 25 with the conical portion positioned at the center of the pivot bearing 28.

Reference numeral 30 denotes a pressing pin inserted through the spring pin 26 and placed on the upper surface of the magnet 27. The magnet 27 is attracted to the spring pin 26 by magnetic force and is positioned at the lower end of the spring pin 26, and the pivot bearing 28, the cutter 29 and the pressing pin 30
Is attracted by the magnetic force of the magnet 27 and fixed at a predetermined position. The outer diameter of the magnet 27 and the pivot bearing 28 are set to be substantially the same, and
1 can be slid. For this reason, the center axis of the cutter 29 is coaxial with the center axis of the holder 16.

Reference numeral 31 denotes a cylindrical cap with a bottom having a threaded portion 32 engraved on the inner peripheral surface. The outer surface 33 at the bottom is formed into a slightly spherical surface with a small curvature, and a projection hole 34 is formed at the center of the bottom. ing. The cap portion 31 is attached to the lower side of the holder portion 16 by screwing the screw portion 32 to the screw portion 19 of the holder portion 16 in a state where the blade portion 35 of the cutter 29 is inserted into the protrusion hole 34. I have. As shown in FIGS. 2 and 3, small points 36 and elliptical points 37 are alternately provided at five points on the upper end side circumference of the cap portion 31 at regular intervals. With reference to the reference point 38 provided on the reference 16, the cap 31 moves vertically 0.1 mm with respect to the holder 16 when rotated by one division. Therefore, when the cap portion 31 is rotated once, it moves 1 mm.

In this configuration, to cut a sheet (not shown), first, the cutter holder 15 holding the cutter 29 is attached to a carriage (not shown) of a cutting plotter. At this time, with the flange portion 17 of the cutter holder 15 in contact with the grip portion of the carriage, the trunk portion of the cutter holder 15 is gripped by the grip portion. Then, by rotating the cap portion 31,
The protrusion amount of the blade portion 35 is adjusted, and the sheet is cut when the protrusion amount is in an appropriate state.

In this case, since the protruding amount of the blade portion 35 is appropriate and the bottom outer surface 33 of the cap portion 31 is formed in a spherical surface, the cut portion of the sheet may become entangled with the cutter holder 15. And good cutting is performed. Further, even when the sheet is placed obliquely with respect to the cutter holder 15, the lower end corner of the cutter holder 15 does not abut on the sheet and hinder cutting. Further, the groove 20 of the holder 16 has
A ring 24 is attached, and this is the cap 3
1 is pressed into contact with the inner peripheral surface of
1 does not rotate and the amount of protrusion of the blade portion 35 does not change.

Further, when the cutting is completed and the cutter 29 having the worn blade portion 35 is replaced, the cutter holder 15 is removed from the carriage, and the pressing pin 30 is pressed downward as shown in FIG. Push into 16. Then, the portion of the cutter 29 protruding from the protruding hole 34 of the cap portion 31 is grasped with a finger or tweezers and pulled out. Next, a new cutter 29 is inserted into the cutter holder 15 through the protruding hole 34 and the pressing pin 3
Release the downward pressure on 0. As a result, the cutter 29 is magnetically attached to the magnet 27 by the attraction force, and the magnet 27 is
The state is automatically changed from the state shown in FIG. 4 to the state shown in FIG.

As described above, in the cutter holder 15 according to the above embodiment, the cutter 29 is held by the holder 16 and
A cap portion 31 is attached to the lower side of the holder portion 16 via the screw portions 19 and 32, and by rotating the cap portion 31, the cutter 29 is rotated.
The protrusion amount of the blade portion 35 is adjusted. Therefore, even if the protrusion amount of the blade portion 35 is adjusted, the cutter 15
The distance between the blade portion 35 and the sheet does not change at all, and the same cutter pressure can always be maintained. Further, the adjustment of the amount of protrusion of the blade portion 35 is extremely easy because only a simple operation of rotating the cap portion 31 is required.

Further, since the bottom surface of the cap portion 31 of the cutter holder 15 is formed in a spherical surface, the bottom surface of the cap portion 31 is in contact with the surface of the sheet even if the sheet flexes and floats. The area is reduced,
Friction resistance is reduced. For this reason, even if the cap portion 31 comes into contact with a step portion or the like due to the cutting of the sheet, good cutting can be continued without any influence.

In the cutter holder 15, the magnet 27 is magnetically attached to the spring pin 26 and positioned, and the pivot bearing 28 and the cutter 29 are magnetically attached to the magnet 27 and positioned at a predetermined position. Is automatically fixed at an appropriate position only by being inserted into the holder portion 16. Therefore, in order to attach the cutter 29 to the holder 16, it is not necessary to form the cutter in a special shape or incorporate a special mechanism in the holder 16.

Further, when replacing the cutter 29, the cutter 29 is pulled out from the projecting hole 34 of the cap portion 31 with the pressing pin 30 pressed down, a new cutter 29 is inserted through the projecting hole 34, and It is extremely easy only by releasing the pressure. The O-ring 24 is provided between the holder 16 and the cap 31.
Is provided to prevent slippage, so that the once set protruding amount of the blade portion 35 is prevented from changing during cutting of the sheet. In addition, the bottom outer surface 33 provided on the cap portion 31 can be used for a cutter holder like the conventional example without using the cap portion 31.

[0021]

[Effect of the Invention] As described above, since the present invention is configured, even if the amount of protrusion of the blade portion of the cutter is adjusted, the distance between the blade portion of the cutter and the sheet does not change, and the same cutter is always used. Pressure can be maintained. Further, the adjustment of the protruding amount of the blade portion is very easy because only a simple operation of rotating the cap portion is required. Further, in this cutter holder, since the bottom surface outer surface of the cap portion is formed in a spherical surface, even if the cap portion and the sheet come into contact, the contact area is reduced and the frictional resistance is reduced. For this reason, even if a sheet and a cap part contact, it becomes possible to perform favorable cutting without any influence. Therefore, the practical effect is large.

[Brief description of the drawings]

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

FIG. 2 is a front view showing a state in which the protruding amount of the blade is small.

FIG. 3 is a front view showing a state in which the protruding amount of the blade portion is large.

FIG. 4 is a longitudinal sectional view showing a state where the cutter is replaced.

FIG. 5 is a longitudinal sectional view showing a cutter holder according to a conventional example.

[Explanation of symbols]

 15 Cutter holder 16 Holder part 19, 32 Screw part 29 Cutter 31 Cap part 33 Bottom outer surface 34 Projection hole 35 Blade part 36 Small point 37 Elliptical point

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-214997 (JP, A) JP-A-4-152,094 (JP, A) Jiko 36-1191 (JP, Y1) (58) Field (Int.Cl. ⁷ , DB name) B26D 1/10 B26D 5/00

Claims (1)

(57) [Scope of request for utility model registration] A carriage in a cutting plotter .
A cutter holder having a blade formed at a lower end thereof, the cutter holder being rotatably held along a central axis, and a body having a substantially cylindrical shape held by the grip. A screw is engraved on the outer periphery of the lower side of the holder, and this screw is
A protruding hole drilled at the center of the bottom to allow the blade
Scales provided along the circumference on the circumference, and bulges toward the bottom
By screwing a cylindrical cap with a bottom having a bottom surface formed in a hollow spherical shape and rotating the cap, the amount of protrusion of the blade from the bottom of the cap can be adjusted. A cutter holder characterized in that: