JP3573500B2 - Cutting pen with fixing auxiliary means and cutting method - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a cutting pen, and more specifically, a cutting pen equipped with fixing auxiliary means capable of performing cutting while fixing an object to be cut, such as a cutting plotter and a cutting machine that performs cutting under computer control, and The present invention relates to a cutting method using the same.
[0002]
[Prior art]
Generally, a cutting plotter, a cutting machine, and the like, which are operated by computer control and are devices for cutting an object to be cut, such as a sheet material, a rubber material, and a thermoplastic resin, into desired characters and figures set in advance, are widely used. Used. In such a cutting plotter or a cutting machine, a cutting pen having a cutter for holding a cutter for cutting an object to be cut is used as a cutting device.
[0003]
As a cutting machine equipped with such a cutting device, for example, a cutting machine 1 as shown in FIG. 3 is known. The cutting machine 1 can move the carriage 2 in the left-right direction (X-axis direction), the front-rear direction (Y-axis direction), and the up-down direction (Z-axis direction), and a cutting tool such as a cutter attached to the carriage 2. By moving the object 3 while making contact with the surface of the workpiece 5 fixed on the upper surface of the fixing base 4, characters and figures can be cut according to a predetermined program set in the cutting machine 1 in advance. It has become.
[0004]
In such a cutting machine 1, as a fixing means (not shown) for fixing the workpiece 5, a vice for tightening and fixing both side ends of the workpiece 5 or a vacuum pump is used. In addition to a vacuum table that is fixed by suction by a suction action, an adhesive tape that fixes the object 5 with an adhesive is used.
[0005]
[Problems to be solved by the invention]
However, the following problems have been pointed out in the above-mentioned conventional fixing means. That is, in the fixing means using a vise, if the object to be cut 5 is a thin sheet-shaped material or the like, the central portion of the object is curved upward or downward, resulting in unevenness in the cutting depth. Not suitable for fixing sheet material. Further, in the vacuum table, if most of a large number of suction holes for sucking the workpiece 5 are not closed, air leakage occurs and a proper fixing force cannot be obtained. Material that plugs the holes must be added. Also, in the case of the adhesive tape, the fixing force for fixing the thick material is weak, and the fixing force is significantly reduced by repeated use, and the adhesive material adheres to the object when the object is removed. The problems listed above have led to a significant reduction in cutting accuracy.
[0006]
The present invention has been made in view of the above-described various problems of the related art, and the object thereof is to be able to securely fix any object to be cut, and always An object of the present invention is to provide a cutting pen having auxiliary means for fixing an object to be cut which can perform good cutting, and a cutting method using the same.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, a cutting pen provided with the fixing auxiliary means of the present invention is provided with a support means near a cutter at a lower end of a holder part holding a cutter having a blade part formed at a lower end part. The sphere is urged downward by a spring body, and is provided in a freely rotatable state. When the object to be cut mounted on the base is cut by the cutter, the sphere moves the object to be cut on the base side. Is pressed. Further, in the cutting method using the above cutting pen, when cutting is performed, a sheet material having a high frictional property is set on a base portion, and an object to be cut is placed on an upper surface of the sheet material to perform cutting. I have to.
[0008]
[Action]
In the cutting pen having the fixing auxiliary means according to the present invention configured as described above, the sphere is provided near the cutter via the support means so as to be urged downward by the spring body. Therefore, when the cutting pen is tool-down, the sphere presses the object by utilizing the elasticity of the spring body, and the fixing force of the object can be increased. Also, even when the cutting pen moves during cutting, the sphere rolls and constantly presses the portion of the object around the cutter, which may cause problems such as floating of the object to be cut. Absent. In this case, even if the object to be cut is curved, if the surface of the pedestal on which the object to be cut is placed is a smooth surface, there is no unevenness in the cutting depth.
[0009]
In addition, since the support means is constituted by a base for accommodating the sphere and a small sphere disposed on the inner peripheral surface of the hole of the base, the sphere can be rolled more smoothly. Further, by providing a plurality of support means and a plurality of spheres around the cutter, the object to be cut can be reliably fixed no matter how the traveling direction changes due to the rotation of the cutter. Furthermore, when cutting, since the object to be cut is placed on the base via a sheet material having high frictional properties, the object to be cut slips with respect to the base and may cause a positional shift. Absent. As a result, accurate cutting can be performed.
Next, the present invention will be described in detail based on embodiments.
[0010]
【Example】
FIG. 1 shows a cutting pen 10 having auxiliary means for fixing an object to be cut according to an embodiment of the present invention.
[0011]
In the figure, reference numeral 11 denotes a substantially cylindrical holder part, a flange part 12 is protruded at an upper part of an outer peripheral part thereof, and a screw part 13 is screwed on a peripheral surface at a lower part of the outer peripheral part. There is formed a small diameter portion 14 whose lower portion has a smaller diameter. The inside of the holder portion 11 has an upper side formed with a small-diameter shaft hole 15 and a lower side formed with a large-diameter shaft hole 16. A protruding portion 18 is formed on the inner peripheral surface between the shaft holes 15 and 16. It is protruding along. Reference numeral 17 denotes a hole portion drilled outward from one of substantially the center of the shaft hole 16 toward the outside, and 19 denotes a screw portion threaded on the upper side of the peripheral surface of the shaft hole 15. Reference numeral 44 denotes a blade-adjustment knob having a substantially T-shaped cross section which is screwed into the screw portion 19, and the pivot bearing 20 is disposed below the knob. Further, a chuck mechanism 24 including a spring 21, a chuck outer cylinder 22, and a ball type chuck 23 is mounted below the shaft hole 16.
[0012]
The chuck outer cylinder 22 has a tapered portion having a hole diameter gradually decreasing downward at the lower portion of the inner peripheral surface, and is press-fitted and fixed to the hole portion 16. The ball-type chuck 23 is disposed in the chuck outer cylinder 22. The protrusion is formed on the outer periphery of the cylindrical shape, and four chuck balls 25 are arranged at equal intervals along the lower circumference. Are loosely fitted. A chuck release lever 26 is attached to one of the protrusions of the ball-type chuck 23 so as to pass through the hole 17 of the holder 11 and protrude to the outside. The spring 21 is provided between the protrusion of the ball chuck 23 and the protrusion 18 of the holder 11, and presses the ball chuck 23 against the tapered portion of the chuck outer cylinder 22.
[0013]
Reference numeral 31 denotes a pressing portion provided at a lower portion of the holder portion 11. The pressing portion 31 has a substantially cylindrical base 27, a substantially cylindrical middle piece 28 having a slightly smaller diameter than the base 27, a spring 29, and a substantially hollow circular ball caster 30. It is composed of The base portion 27 has a screw portion 32 threaded on an upper portion of an inner peripheral surface thereof and is screwed with the screw portion 13 of the holder portion 11, and an engaging portion 33 is protruded from a lower inner peripheral surface. .
[0014]
The slide piece 34 is protruded from the outer peripheral surface of the upper edge of the middle piece 28, and is squeezed inward so that the lower edge has a slightly smaller diameter. A space formed by the small diameter portion 14 of the holder 11 and the inner peripheral surface of the base 27 in a state where the slide engagement part 34 is engaged with the engagement part 33 of the base 27 and is prevented from falling downward. The inside of the section 35 can be slid up and down.
[0015]
The ball caster 30 has the base portion 36 fixed to the lower portion of the middle piece 28 by being fitted thereinto, and is equidistant from the center of the through hole 40 around the through hole 40 formed at the center. Thus, four caster holes 39 are formed. The caster hole 39 is a hole that can be rollably held with the lower end of the ball 38 always projecting downward, and by holding a plurality of auxiliary balls 37 above the ball 38. The ball 38 can rotate smoothly. The spring 29 is disposed with its upper end portion abutting on the lower end surface of the holder portion 11 and its lower end portion abutting on the upper surface of the base portion 36 of the ball caster 30, and biases the ball caster 30 downward. It is supposed to.
[0016]
In order to attach the pressing portion 31 configured as described above to the holder portion 11, after inserting the middle piece 28 into the base part 27, a spring 29 is inserted into the inside of the middle piece 28 and screwed into the base part 27. The screw section 32 and the screw section 13 of the holder section 11 are attached by screwing. As a result, a space 35 is formed between the inner peripheral surface of the base 27 and the outer peripheral surface of the small-diameter portion 14, and the slide engagement portion 34 is located in the space so as to be vertically movable. In this case, the middle piece 28 is urged downward by the elasticity of the spring 29 disposed therein, but does not come off because the slide engagement portion 34 engages with the engagement portion 33 of the base 27. .
[0017]
The upper end 42 of the cutter 41 is formed in a conical shape. The upper end 42 is positioned at the center of the pivot bearing 20, and the lower end is inserted into the center hole of the chuck mechanism 24 in a rotatable state. Is mounted so as to protrude from the through hole 40 of the ball caster 30. The cutting edge 43 of the cutter 41 is located above the lower end of the ball 38 in a normal state, but is located below the lower end of the ball 38 when the ball 38 is pressed and the spring 29 is contracted.
[0018]
In this configuration, when using the cutting pen 10, first, the chuck release lever 26 of the chuck mechanism 24 is pushed up, and the cutting edge adjustment knob 44 is rotated in a state where the holding of the cutter 41 is released. Adjust the amount of protrusion. Then, the chuck release lever 26 is released in a state where the amount of protrusion is proper, and the ball chuck 23 is moved downward by the elasticity of the spring 21 to clamp the cutter 41. Then, it is attached to a pen carriage such as a cutting machine (not shown) by a predetermined method. Cutting is performed according to a program provided in advance in the cutting machine. During this time, the cutting pen 10 moves up and down (Z-axis direction) while moving in the X-axis and Y-axis directions together with the pen carriage. Cutting can be performed by repeatedly performing the operation of moving to.
[0019]
When the cutting pen 10 is in a tool-up state (away from the object to be cut) during cutting in this manner, the cutting pen 10 is simply held by the pen carriage, and the pressing unit 31 is pressed. The middle piece 28 is urged downward by the elasticity of a spring 29 disposed in the middle piece 28, and the cutting edge 43 of the cutter 41 is located above the lower end surface of the ball 38.
[0020]
Next, as shown in FIG. 2, when the tool is lowered (in contact with the object to be cut) in this state, the cutting pen 10 is lowered by the pen carriage being lowered by an instruction of the cutting machine, and the cutting pen 10 is pressed. The lower end face of the ball 38 of the part 31 comes into contact with the upper end face of the object 45 to be cut. When the spring 29 is further lowered, the spring 29 in the middle piece 28 is contracted by the upper surface thereof being pressed by the lower end face of the holder 11, and the slide engagement portion 34 of the middle piece 28 moves above the space 35. Therefore, when the pen carriage is completely lowered, the middle piece 28 presses the upper surface of the cut object 45 via the ball 38 by the elasticity of the spring 29, and the cutting edge 43 causes the middle piece 28 to slide upward. As a result, it protrudes from the lower end surface of the ball 38 and pierces the cut object 45.
[0021]
Then, in this state, the pen carriage is moved in the X-axis and Y-axis directions to move the cutting pen 10 to perform cutting. In this case, the cutting edge 43 of the cutter 41 moves while piercing the object 45, and the ball 38 disposed around the cutting edge always rolls while pressing the periphery of the cutting edge 43 of the object 45. This prevents the workpiece 45 from floating or being displaced due to cutting resistance.
[0022]
When the tool is raised again, the holder 11 of the cutting pen 10 is raised by raising the carriage, whereby the cutter 41 and the base 27 supported by the holder 11 are raised. The ball 25 is pressed against the cutter 41 by the tapered portion of the outer cylinder 22, and the cutting edge 43 comes off from the object 45 without the cutter 41 coming off the cutting pen 10. Until the slide engaging portion 34 of the middle piece 28 engages with the engaging portion 33 of the base 27, the object 45 is kept pressed by the action of the spring 29. As described above, since the middle piece 28 of the pressing portion 31 keeps pressing the object 45 when the slide engagement portion 34 is located above the space portion 35, the cutting edge 43 is smoothly 45 and can return to the original state.
[0023]
In the drawing, reference numeral 46 denotes a sheet material having a high frictional property composed of a soft rubber, a high-density polyurethane, or the like for increasing the fixing force of the object 45. The object 45 is prevented from being displaced.
[0024]
Further, the cutting pen 10 may be used as an auxiliary to the fixing means described in the conventional example, or the cutting pen 10 may be used alone as the fixing means.
[0025]
As described above, according to the cutting pen 10 having the object fixing auxiliary means, cutting is performed while urging the object 45 downward by the pressing portion 31 disposed at the lower end of the cutting pen 10. Therefore, no special means for fixing the object 45 is required. Therefore, an operation for fixing the object 45 is not required, and various problems caused by various fixing means described in the conventional example are inevitably solved.
[0026]
In an embodiment other than the above, in a cutting machine that is a theta axis control that performs cutting while correcting the direction of the blade edge of the cutter by computer control, the ball 38 rotates with the rotation of the cutter 41, so that an appropriate effect is achieved. The same operation and effect as in the above-described embodiment can be obtained by merely providing one at a place where the movement is possible, for example, immediately behind the traveling direction.
[0027]
【The invention's effect】
As described above, since the cutting pen provided with the cutting object fixing auxiliary means according to the present invention is configured, any cutting object can be securely fixed, and the cutting object is curved. This has the advantage that it is possible to always perform good cutting because it is possible to prevent the cutting, and the practical effect is great.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of a configuration of a cutting pen provided with fixing means according to an embodiment of the present invention, wherein (a) is a longitudinal sectional view and (b) a bottom view.
FIG. 2 is a longitudinal sectional view showing a cutting state of the present invention.
FIG. 3 is a perspective view of a conventional cutting machine.
[Explanation of symbols]
Reference Signs List 10 cutting pen 11 holder parts 13, 19, 32 screw part 14 small diameter part 15, 16 shaft hole 20 pivot bearing 21, 29 spring 24 chuck mechanism 27 base part 28 middle piece 30 ball caster 31 pressing part 33 engaging part 34 slide member Joint part 35 Space part 36 Base part 37 Auxiliary ball 38 Ball 39 Caster hole 40 Through hole 41 Cutter 43 Cutting edge 44 Cutting edge adjustment knob

Claims (3)

In the vicinity of the cutter at the lower end portion of the holder portion holding the cutter having a blade portion formed at the lower end portion, a sphere is urged downward by a spring body via a support means and provided in a freely rolling state via a supporting means, When cutting an object placed on the base by the cutter, the sphere presses the object to be cut toward the base,
The support means has a hole, and a plurality of bases are provided along the inner peripheral surface of the hole, and a plurality of base portions are provided in the hole so that the lower end of the sphere can be accommodated in a state of being exposed. A small ball that can be rolled, while the ball is configured to be pushed from above by a plurality of small balls . 3. A cutting pen provided with the fixing assisting device according to claim 1 or 2, wherein a plurality of spheres and supporting means are provided around the cutting edge of the cutter. When cutting is performed using the cutting pen according to claim 1 or 2, a sheet material having high frictional properties is placed on the base, and an object to be cut is placed on the upper surface of the sheet material. A cutting method for cutting.

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