JPH08142587A - Nose guide - Google Patents

Abstract

PURPOSE: To simplify the operation of a nose guide and to improve the adjustment accuracy of cutting depth by installing an energization part vertically movably in the lower part of a carriage through a support part and inserting a plate with a thickness of the drop of a cutter between the support part and the energization part when the drop of the cutter is adjusted. CONSTITUTION: When a nose guide 20 is used, the protrusion of a cutter 22 from the nose guide 20 is adjusted by lowering an energization part 24 in accordance with the depth of cutting in a material to be cut. That is, the deference between the protrusion of the existing cutter 22 and the necessary depth of cutting is calculated. Next, a plate 25 with the same thickness as the difference or a plate 25 of a combination of more than one plate with the same thickness as the difference is inserted between the lower end surface of the support part 23 and an energization board 35 of the energization part 24 so that the protrusion is adjusted at a specified value.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nose guide which is used in a cutting plotter for cutting by computer control and which can arbitrarily adjust the cutting depth of an object to be cut by adjusting the protruding amount of the cutting edge of the cutter. is there.

[0002]

2. Description of the Related Art Generally, a computer is operated to control a desired character or figure set in advance by plastic,
A cutting plotter for cutting a sheet material or a plate material made of rubber, wood, or the like is widely used. Among such cutting plotters, there is one that uses a nose guide for adjusting the cutting depth of the object to be cut.

As a cutting plotter having such a nose guide, there is a cutting plotter 1 as shown in FIG. 5, for example. This cutting plotter 1
Is capable of moving the carriage 3 holding the cutter 2 (see FIG. 6) in the left-right direction (X-axis direction) and the front-back direction (Y-axis direction) by the guide mechanism 4 and holding the cutter 2 in the vertical direction. It can be moved in the (Z-axis direction). A nose guide 5 is attached so as to surround the cutting edge of the cutter 2 held by the carriage 3. The nose guide 5 is moved in a state in which the blade edge of the cutter 2 protruding from the lower end is in contact with an object to be cut placed on the upper surface of the mounting table 6, and thus a predetermined program set in the cutting plotter 1 in advance. The cutting depth can be kept constant when cutting characters and figures according to the above.

The nose guide 5 will be described in more detail with reference to FIG. 7 is an upper surface portion 8 of the carriage 3.
It is a cutter holding part which is hung from the lower surface, and a holding hole 9 for holding the cutter 2 is bored in the inside thereof, and a hole 10 having a large diameter is formed below the holding hole 9 and a threaded portion 11 is screwed on the peripheral surface thereof. ing. Reference numeral 12 denotes a substantially cylindrical urging portion having a flange portion 13 projectingly provided on the lower portion of the outer peripheral surface, and a screw portion 14 is threaded on the outer peripheral surface on the upper side thereof. The biasing portion 12 has a screw portion 14
The nut 15 is screwed to the lower side of the
It is attached to the holding part 7 by being screwed into the screw part 11 of 0, and the screwing position of the nut 15 is moved upward so that the nut 15 is pressed against the lower end of the holding part 7 so that the nut 15 is tightened and fixed. It has become.

In use, first, the nut 15 is pivotally operated to release the tightening and fixing of the biasing portion 12. Then, by rotating the biasing portion 12, the screwing amount of the screw portion 14 and the screw portion 11 of the holding portion 7 is adjusted to adjust the protrusion amount of the biasing portion 12 with respect to the holding portion 7. In this case, the biasing unit 12
By adjusting the amount of protrusion of, the amount of protrusion of the cutting edge of the cutter 2 from the lower end surface of the flange portion 13 is adjusted. Then, when the amount of protrusion of the cutter 2 is at an appropriate amount, the nut 15 is again rotated to tighten and fix the biasing portion 12 so that the cutting operation can be performed.
As a result, at the time of cutting, the blade tip portion of the cutter 2 protruding from the lower end surface of the flange portion 13 of the urging portion 12 is inserted into the cut portion 16 by a certain amount, and cutting is performed at the certain insertion depth. Will be able to do.

[0006]

However, with the conventional nose guide as described above, it is difficult to accurately adjust the amount of protrusion of the cutting edge of the cutter 2, and it is difficult to perform accurate cutting. Moreover, when trying to accurately adjust the protruding amount of the blade of the cutter 2, the urging portion 1
It is necessary to know the displacement amount of the cutting edge protrusion of the cutter 2 for one rotation of 2, and it is necessary to calculate how many rotations of the biasing portion 12 are necessary to adjust to the desired protrusion amount. According to this, there arises a problem that the adjusting operation becomes complicated and the dimensional accuracy of the screw portions 11 and 14 must be made high. Furthermore, when adjusting to the calculated protrusion amount, the nut 15 and the urging portion 12 are located in a narrow space between the carriage 3 and the mounting table 6 of the cutting plotter 1, which makes it difficult to handle, and these are accurately measured a predetermined number of times. It also has the problem of being difficult to rotate.

As another adjustment method, the flange portion 1
A method is known in which a plurality of urging portions 12 having different thicknesses are provided and the protrusion amount is adjusted to a desired amount by exchanging the urging portions 12 each time. Besides being troublesome, there is a problem that the cost is high because a plurality of biasing portions 12 are required. Further, there is also a problem that the hand comes into contact with the cutter 2 when the biasing portion 12 is replaced, which may easily cause an injury.

The present invention has been made in view of the above-mentioned various problems of the prior art, and an object of the present invention is to achieve accuracy with a very simple operation without using a plurality of biasing portions. An object of the present invention is to provide a nose guide in which the cutting depth of a good work piece can be adjusted and its operation is safe.

[0009]

In order to solve the above-mentioned problems, a nose guide according to the present invention has a lower end portion of a carriage for holding a cutter having a blade portion formed at a lower end portion thereof and an upper side of the cutter. The nose guide is provided with a supporting portion surrounding the above, and an urging portion whose lower surface is a sliding contact surface in a state in which the supporting portion is vertically movable and the lower blade portion of the cutter is projected. A spring body that is interposed between the support portion and the biasing portion and biases the biasing portion upward, and can be detachably mounted between the support portion and the biasing portion. By contrast, a plate capable of lowering the urging portion by the thickness thereof is provided, and the amount of protrusion of the cutting edge of the cutter can be arbitrarily adjusted.

[0010]

In other words, in the nose guide according to the present invention,
An urging portion is provided in a lower end portion of the carriage so as to be vertically movable via a support portion so as to surround the cutter held by the carriage, and the urging portion is configured to always urge upward by elasticity of a spring body. ing. When lowering the position of the urging part to adjust the amount of protrusion of the blade part of the cutter, insert a plate with a thickness corresponding to the lowering amount between the support part and the urging part, The cutting depth of can be set to an arbitrary constant value. As a result, accurate cutting becomes possible. Further, the adjustment of the blade protrusion amount of the cutter is not required to rotate or replace the biasing portion as in the conventional example, but only the plate is attached / detached between the support portion and the biasing portion, It is extremely simple and can be performed quickly. Furthermore, the blade edge of the cutter is not exposed, so it is also highly safe.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a state in which a nose guide 20 according to the present invention is attached to a cutter holding portion 21 of a carriage. The nose guide 20 is arranged so as to surround the cutting edge portion of the cutter 22 held by the cutter holding portion 21, and is composed of a support portion 23, a biasing portion 24, a plate 25 and a spring body 26. The support portion 23 is formed in a cup shape having an insertion hole 27 in the center of the bottom,
An upper portion of the outer peripheral portion is cut out and a screw portion 28 is threaded on the peripheral surface. Further, the outer peripheral lower end corner portion is chamfered to form a taper portion 29 whose diameter is gradually reduced downward, and the ring-shaped bottom portion engages with a spring body and a plate which will be described later.
0 is formed. The support portion 23 is attached to the cutter holding portion 21 by screwing the screw portion 28 into the screw portion 31 screwed on the peripheral surface of the recess provided on the bottom surface of the cutter holding portion 21.

The urging portion 24 has a cylindrical shape having a diameter smaller than that of the support portion 23, a cylindrical body 33 having a flange-shaped engaging portion 32 protruding from the outer peripheral surface of the upper end portion thereof, and a ring-shaped outer periphery. The urging plate 35 is provided with a tapered portion 34 whose upper end corner portion is chamfered. The urging plate 35 is fixed to the lower end surface of the cylindrical body 33 by screws 36.
The urging portion 24 has the outer peripheral surface of the engaging portion 32 in sliding contact with the inner peripheral surface of the supporting portion 23 and the outer peripheral surface of the tubular body 33 in sliding contact with the inner peripheral surface of the engaging portion 30. It is arranged inside the support portion 23 so as to be vertically movable. A coil-shaped spring body 26 is provided between the engagement portion 30 of the support portion 23 and the engagement portion 32 of the cylindrical body 33.
Is disposed with its upper end contacting the lower end surface of the engaging portion 32 and its lower end contacting the upper end surface of the engaging portion 30,
The biasing section 24 is biased upward.

Reference numeral 25 denotes a thin plate having a sliding contact surface on the lower surface thereof, which is substantially U-shaped in a top view as shown in FIG. 2, and its front end portion is formed into a tapered acute angle portion 37. The plate 25 is prepared in advance by a plurality of plates having different thicknesses or the same thickness. By inserting the acute angle portion 37 between the tapered portions 29 and 34, the plate 25 is attached to the engaging portion 30 of the supporting portion 23. It can be detachably inserted and interposed between the biasing plates 35 of the biasing portion 24.

When the nose guide 20 thus constructed is assembled to the cutter holding portion 21, first, the spring body 26 is inserted into the support portion 23, and then the cylindrical body 33 is inserted. Then, the urging plate 35 is fixed to the lower end surface of the cylindrical body 33 by the screw 36, and the screw portion 28 of the support portion 23 and the screw portion 31 of the cutter holding portion 21 are screwed together. This allows the nose guide 20 to be fixed to the cutter holding portion 21. In this case, the cutter 22 is inserted into the inside of the nose guide 20 and its blade edge portion is exposed downward by a predetermined amount. The predetermined amount is the maximum cutting depth that the cutter 22 can cut. The urging portion 24 is urged upward by the elasticity of the spring body 26, and the upper surface of the urging plate 35 and the lower surface of the engaging portion 30 of the supporting portion 23 are in contact with each other.

In this structure, the nose guide 20 is provided.
When the cutter 2 is used, the urging portion 24 is lowered according to the cutting depth for the object 38 to be cut.
The protrusion amount of No. 2 from the nose guide 20 is adjusted so as to match a predetermined cutting depth to the object 38 to be cut. Explaining this operation in detail, first, the difference amount between the current protrusion amount of the cutter 22 and the required cutting depth is calculated. Next, the plate 25 having the same thickness as the difference amount or a plate 25 having the same thickness is combined between the lower end surface of the support portion 23 and the urging plate 35 of the urging portion 24 by a combination of a plurality of plates 25. insert. In this case, the plate 25 includes the support portion 23 and the urging plate 35 from the acute angle portion 37.
Is inserted between the tapered portions 29 and 34 of the spring body 26, the urging portion 24 descends while resisting the elasticity of the spring body 26, and the outer peripheral surface of the cylindrical body 33 and the semicircular portion of the inner periphery of the plate 25 contact each other. The plate 25 is sandwiched between the support portion 23 and the urging portion 24.

As a result, the urging portion 24 moves to the plate 25.
The thickness of the cutter 22 is lowered, and the protrusion amount of the cutter 22 is reduced by that amount to reach a predetermined protrusion amount. Then, in this state, various preparations for the cutting work can be performed to perform the cutting. At the time of cutting, the cutter holding portion 21 is lowered to allow the cutter 22 and the nose guide 2 to be cut.
0 simultaneously descends and the cutting edge of the cutter 22 cuts the object 3
Stick on the upper surface of 8. Further, the lower end surface of the urging portion 24 of the nose guide 20 comes into contact with the upper surface of the object 38 to be cut by lowering the cutter holding portion 21, and the cutter holding portion 21
Is completed. As a result, the cutter 22 pierces the object to be cut 38 by the amount of protrusion from the urging portion 24, and cutting can be performed by moving the cutter holding portion 21 in this state. Then, when the predetermined cutting operation is completed, the plate 25 can be returned to the original state in which the plate 25 is pulled out in the opposite direction to that when the plate 25 is inserted.

In the above embodiment, the supporting portion 23
The spring body 2 is provided between the engaging portion 30 of the
6 is arranged to urge the urging portion 24 upward, but as shown in FIG. 3, the spring body 26a is provided between the upper surface of the engaging portion 32a of the cylindrical body 33a and below the cutter holding portion 21a. Alternatively, the biasing portion 24a may be fixed and biased upward by the elasticity of the spring body 26a. Further, in the embodiment shown in FIG. 1, the urging portion 24 is arranged inside the support portion 23 or the cutter holding portion 21, but as shown in FIG. 4, the urging portion 24b is more than the support portion 23b. May be formed in a large size, and the engaging portion 30b of the supporting portion 23b may be provided so as to project outward, and the engaging portion 32b of the biasing portion 24b may be provided so as to project inside. In this case, the plate 25b comes to be attached / detached between the upper surface of the urging portion 24b and the lower surface of the cutter holding portion 21b on the main body side. The function and effect of both the embodiments are the same as those of the embodiment shown in FIG.

As described above, according to the nose guide 20, the biasing portion 24 is provided inside the support portion 23 so as to be vertically movable via the spring body 26, and in this state, the biasing portion 2 is provided as needed.
25 having an arbitrary thickness between the plate 4 and the support 23
The position of the biasing portion 24 is adjusted by interposing. Therefore, the complicated biasing portion 1 as described in the conventional example is used.
The adjustment work of No. 1 is not required, and the position of the biasing portion 24 can be adjusted very easily and quickly with high precision, and the cutting edge portion of the cutter 22 is not exposed, so that the work can be performed safely. . Further, the tapered portions 29 and 34 are formed on the support portion 23 and the biasing portion 24, so that the plate 25 can be smoothly inserted.

[0019]

As described above, since the nose guide according to the present invention is constructed, the cutting depth of an object to be cut can be adjusted with high precision by a simple operation without using a plurality of biasing portions. It has the advantage that it can be performed and its operation is safe, and the practical effect is great.

[Brief description of drawings]

FIG. 1 is a sectional explanatory view of a nose guide showing an embodiment of the present invention.

FIG. 2 is an explanatory view of a plate in the nose guide shown in FIG.

FIG. 3 is a sectional explanatory view of a nose guide showing another embodiment of the present invention.

FIG. 4 is a cross-sectional explanatory view of a nose guide showing another embodiment of the present invention.

FIG. 5 is a perspective view of a cutting plotter including a nose guide according to a conventional example.

FIG. 6 is a sectional explanatory view of a conventional nose guide.

[Explanation of symbols]

1 Cutting plotter 2, 22 Cutter 3 Carriage 5, 20 Nose guide 7, 21, 21a, 21b Cutter holding part 11, 14, 28, 31 Screw part 12, 24, 24a, 24b Energizing part 13 Flange part 15 Nut 16, 38 Cut object 23, 23b Support part 25, 25b Plate 26, 26a Spring body 29, 34 Tapered part 30, 30b, 32, 32a, 32b Engagement part 33, 33a Cylindrical body 35 Biasing plate 36 Screw

Claims (1)

[Claims] 1. A support portion is provided at a lower end portion of a carriage for holding a cutter having a blade portion formed at a lower end portion so as to surround an upper portion of the cutter blade portion, and the support portion is vertically movable in the state described above. A nose guide provided with an urging portion whose lower surface is a sliding contact surface in a state where the lower blade portion of the cutter is projected, the nose guide being interposed between the support portion and the urging portion, A plate that can be detachably attached between the spring body that biases upward, the support portion, and the biasing portion and that can lower the biasing portion by the thickness thereof against the spring body. A nose guide characterized in that the amount of protrusion of the cutting edge of the cutter can be arbitrarily adjusted.