JPS5924830B2 - cutter knife device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cutter knife for cutting workpieces such as strip films in automatic drawing machines, etc. The demand for cutting film strips in Japan is increasing significantly, but the conditions for cutting the film are such that the cut line needs to be light-shielding, and it is difficult to ensure that the strip work involved in cutting can be carried out smoothly. In order to be
It goes without saying that the cutter blade has good sharpness, but the most important problem is that the cutter blade cuts into the base film to an appropriate depth, never cutting too much or excessively.
Alternatively, in order to simplify the cutter's up-and-down mechanism, it is essential for the cutter of an automatic drawing machine that the cutting edge does not pierce the film excessively due to the inertial force caused by the cutter's descent. However, since the amount of protrusion of the cutting edge is extremely small, adjusting the appropriate amount of protrusion is extremely difficult. The depth of penetration into the object is manually adjusted and fixed while testing the condition.

However, since this manual operation relies on the feel of the hands and the naked eye, it is difficult to automatically adjust the amount of protrusion to ensure the perfect amount of protrusion. If the protrusion is too long during adjustment, there is a risk that the cutting edge will easily break, and if the protrusion is too short, the cutting depth will not be adequate, making it difficult to perform a reliable stripping operation. Another disadvantage is that the mechanism for holding the blade in place in its protruding state is complicated and the holding operation thereof is not easy.

The present invention solves all of the various conventional conditions and difficulties as described above, and makes it possible for the cutting edge to automatically protrude from the cutter holder by an appropriate amount depending on the hardness of the object, as well as for replacing the blade. The object of the present invention is to provide a simple and economical cutter knife device for use in automatic drafting machines, etc., which has a simple mechanism that can easily hold the blade in place at the appropriate protrusion position, and is easy to operate. , a suitable mounting space is provided in the force center holder so that the entire cutter blade can be retracted from the bottom surface thereof, and when the lower end of the holder lowered toward the space comes into contact with the object,
Depending on the hardness of the object, the insertion blade enters into the cavity with resistance so that the insertion blade remains protruded by an appropriate amount from the holder with the insertion blade inserted to an appropriate depth into the cut layer of the object. A frictional resistance mechanism such as a spring-loaded ball or other suitable pressing spring member, a cushioning material such as rubber, or other suitable frictional member is provided to provide an appropriate adjustment resistance to the blade, and the cutter blade is moved into the space. The resistor is fitted in contact with the resistor mechanism, and further, from the outside of the holder,
The present invention is characterized by being equipped with a locking mechanism such as a restraining pawl, a tightening screw, or other suitable stopper member for restraining and fixing the insertion blade in a state where the cutting edge protrudes by an appropriate amount.

゛An embodiment of the device of the present invention is applied to a cutter knife device of an automatic drawing machine for cutting strip film.
The explanation is as follows based on the attached drawings.

For a cylindrical holder case 1, a cutter holder 3 with a head 2 bulging above the case 1 and a conical lower end slightly protruding from below the case 1 is installed at the lower or upper end of the case. The holder 3 facing the circumference and there
a jagged portion 4 that controls the free rotation of both parts, respectively;
The cutter blade 6 is loosely inserted from the center of the lower surface of the holder 3 to the circumferential side. A groove 8 is vertically bored at a length that can be inserted into the holder 3 and communicates with the hollow space 7 on the lower circumference of the holder 3.
is bored horizontally, and one part of the case relative to the groove 8 is cut down so that the claw piece 9 protrudes and fits loosely into the groove, and by turning the case 1 or the holder 3, the claw piece 9 is inserted into the groove. The guide slide is brought to a position close to the communication part of the space 7, and the claw piece 9 is inserted into the groove 8 between the space 7 and the claw piece 9.
A coil spring 10 that expands and contracts with the movement of the coil spring 10 and a steel ball 11 that partially protrudes into the space 7 are fitted, and the cutter blade 6 is placed in the space T and the steel ball 11 is placed on the side of the coil spring 10. At the same time, another groove 23 is horizontally drilled below the groove 8 of the cutter holder 3 in parallel with the groove 8, and the other groove 23 has a claw. The attachment is made by cutting an outward claw piece 24 facing opposite to the claw piece 9 into a groove at a location opposite to the holder case 1 which is closer to the empty space than the piece 9.

In addition to the outward claw piece 24, the locking mechanism may be replaced by another means, such as a screw lock using a set screw 25 for restraining the blade surface, as shown in FIG. 6.

Furthermore, when mounting the hollow space 7, if the center portion of the holder 3, which is the base thereof, is opened into a small circular hole, a needle can be inserted into the small circular hole instead of a blade.

In the figure, reference numeral 12 denotes a circulation hole in the center of the head of the holder 3 that communicates with the cavity 7, and there is a push rod 13 having a length that extends from the head and reaches the cavity 7. The push rod 13 is fitted with a coil spring 14 interposed therebetween so as to move up and down, and the push rod 13 further has a thin neck portion 15 formed inside the holder head.
The tip of a locking pin 16 is fitted into this portion from the outside of the case 1 to limit the vertical movement range of the spring of the press rod 13 and to position the cutter in one direction.

This press rod 13 may inadvertently cause the entire cutter blade 6 to
When immersed in oneself or when performing a paternal exchange,
By pressing the push rod 13, the push rod 13 connects to the circulation hole 12.
is lowered by a spring, and the tip of the rod pushes the rear end of the retractable blade, thereby causing the blade to jump out of the space I by the length of the lowering range of the pusher rod 13, and the reversing of the cutter blade 6. This is a blade extrusion mechanism that is installed to facilitate adjustment and replacement, but this is not an essential configuration.

Further, H is a strip film which is a workpiece of the automatic drawing machine, and H' is a cut layer of the film H.

Furthermore, the mechanism for controlling the free rotation of the case 1 and the holder 3 may be any mechanism other than the above-mentioned serrations 4 and 5, such as the addition of a suitable tightening screw mechanism from outside the case 1.

In addition to the spring-loaded steel balls 11 fitted in the grooves 8 as described above, the pressure adjustment mechanism for applying frictional resistance to the cutter blade 6 is as shown on the other side of FIG. , an adjustment push screw 1 screwed into a communication hole 17 communicating with the cavity 7.
8 and a friction block material 19 made of a suitable elastic material such as rubber or stone, etc., and in this case, the holder main body becomes a non-rotating type.

Further, instead of the steel ball 11, the pressure member is not limited to a spring, and various other pressure members can be freely selected and adopted.

In the figure, reference numerals 21 and 22 are scales provided on the case 1 and holder 3 to display the rotation angle, but these scales are not essential, and are provided with a suitable stopper that can stop the rotation with fine adjustment. The device can be replaced.

To explain the operation of the device of the present invention, the amount of protrusion of the cutting edge of this type of cutter knife device is on the order of a minute amount of about 0.03 mm-0.1 mm in the case of strip film H, so compared to the conventional cutter knife device. Although it is very difficult to make fine adjustments using general manual adjustment means, since the device of the present invention is configured as described above, the assembly of the holder case 1 and the cutter holder 3 can be done by the claws of the case 1 in the grooves 8. 9 and another groove 23 so that the outward claw pieces 24 are slidably fitted into each other without coming apart, and both of the claw pieces 9 and 23 are rotated by sliding in the groove. By the rotation, the claw piece 9 moves toward and away from the space 7, thereby adjusting the strength of the elasticity of the coil spring 10 in the groove 8.

Therefore, if the cutter blade 6 is installed with narrow slits at intervals that allow the cutter blade 6 to be inserted into the space 7 in an excessively protruding manner, the side surface of the blade will experience slight frictional resistance against the steel ball 11 and the holder 3 will It will be inserted and held (see Figure 7a).

Thus, the claw piece 9 moves the holder body into the space 7 so that the resistance pressure against the blade surface of the steel ball 11 is adjusted to a friction resistance pressure depending on the hardness of the film H, the sharpness of the blade, and the required amount of pricking. The spring 10 is compressed by rotating the spring 10 so that the spring 10 approaches the spring 10 for variable adjustment, and is set to an appropriate spring pressure.

In this case, if scales 21 and 22 are displayed on the holder body to indicate the resistance force of the appropriate insertion amount of the cutting edge against the film H, then the holder body can be rotated to match the required scale. Further, the adjustment pressure according to the hardness difference of various workpieces can be easily and quickly set using the scale.

This set rotation is controlled and held by the serrations 4 and 5.

Under the condition of appropriate frictional resistance pressure of the steel ball 11 against the cutter blade 6, hold the holder main body vertically, apply the excessively protruding inserted cutting edge directly to the film H, and push down the main body (7th As the main body descends, the cutter blade 6 to which appropriate frictional resistance pressure is applied from the steel ball 11 gradually enters the space 7 with resistance (see Fig. 7c).
, when the lower end of the holder 3 descends until it touches the film surface, the cutting edge of the cutter blade 6, which enters with resistance in response to the descending blade of the main body, passes through the cutting layer H of the film by an appropriate amount and touches the base layer. The cutting edge is manually determined and adjusted to an appropriate and slight protrusion state from the holder 3 by an appropriate biting amount X shown in FIG. 2 (see FIG. 7-2).

In this way, by simply adjusting and setting the frictional resistance pressure against the cutter blade 6 to an appropriate pressure by rotating the holder body, the blade can be moved to the holder by simply applying the blade edge to the film H surface and suppressing and lowering the body. It enters the main body with appropriate frictional resistance pressure corresponding to the descending inertia of the main body,
Since the slight protrusion state of the cutting edge with the proper biting amount

Therefore, the amount of protrusion of the cutting edge is 0.03 鮮-Q, l
Even a very small amount of adjustment, on the order of mrn, can be easily and accurately determined automatically by adjusting the resistance pressure of the resistance member.

When the adjustment of the appropriate amount of protrusion of the cutting edge is completed, when the case 1 is rotated so that the outward claw piece 24 is directed toward the space γ side, the claw piece 24 is aligned in a straight line as shown in FIG. It slides in the groove 23 and rides on the edge of the cutter blade 6 under spring pressure, and the spring pressure pushes the edge of the blade inward to restrain and fix the blade body, thereby changing the blade edge adjustment state. Soma 5
will be retained.

In addition, at the same time as the outward claw piece 24 restrains the sword body, the rotation of the case 1 causes the claw piece 9 to further pressurize the coil spring 10, so the resistance pressure of the steel ball 11 is strengthened and the outward claw piece Together with the locking by the piece 24, a reliable and strong double locking state is achieved.

If necessary, the case 1 portion of the outward claw piece 24 may be separated, and the separated portion may be used as a part of the locking collar, and the locking action may be performed independently by rotating that portion.

As described above, in the device of the present invention, the cutter holder 3 is installed by inserting the cutter blade 6 into the space 7 in an excessively protruding state, applying the cutting edge to the object, and reducing the frictional resistance against the blade body. Just by adjusting the force and pushing down on the holder body, the minute amount of protrusion of the cutting edge is automatically and accurately determined depending on the hardness of the object, so anyone can do it easily, quickly and easily. The blade of the cutter knife can be adjusted accurately and smoothly, and the amount of protrusion of the cutting edge relative to the object is automatically adjusted to the appropriate amount of penetration X that passes through the cutting layer H' and reaches the base layer. By rotating the blade, the edge of the blade is pressed by the claw piece 24 and locked easily, and the protruding state is maintained as it is.As a result, the cutting layer H' can be cut by the protruding amount of the blade Because the locking function prevents the blade from being disturbed by any shock or external pressure, it can be performed accurately and reliably, and there is no fear of the blade breaking.

Therefore, there is no defective cutting, the cutting performance is excellent, and the appropriate amount of force can be adjusted and the blade can be held locked for any workpiece.

Note that the lock can be easily released by rotating the case 1 in the opposite direction to release the claw piece 24 from the blade, thereby preparing for the next force adjustment.

As a result, the cutter knife of the present invention can be applied not only to strip films for masks, but also to cutting only a specific number of sheets of paper stacked together, markings that do not want deep cuts, etc. Not only can it be used with automatic drawing machines, but it can also be used manually.
The range of application is very wide and convenient, and with the addition of a simple locking mechanism, the adjusted blade can be easily held in place, so it can be used without shock, external pressure, or during cutting work on the film surface. Safety is ensured in that there is no slight deviation in the precise adjustment amount of the blade, which is considered to occur in the event of an accidental jump injury, etc., and there are effects such as proper and accurate cutting work being performed.

[BRIEF DESCRIPTION OF THE DRAWINGS] The drawings show an embodiment of the device of the present invention, and FIG. 1 is a partially cutaway perspective view of the device of the present invention showing the main parts, and FIG. 2 is a diagram of the device of the invention shown in FIG. FIG. 3 is a cross-sectional view of the pressure adjustment mechanism; FIG. 4 is a cross-sectional view of another example of the cutter holder and the pressure adjustment mechanism; FIG. 5 is a cross-sectional view of the locking mechanism section showing the locked state, FIG. 6 is a cross-sectional view of another example of the locking mechanism, and FIG. 7 is a conceptual diagram showing the order of force adjustment of the device of the present invention. 1...Holder case, 3...Cutter holder,
6... Cutter blade, 7... Hole for mounting, 8... Groove, 9... Claw piece, 10... Coil spring, 11...
Steel ball, 23...another groove, 24...outward claw piece.

Claims (1)

[Claims] 1. Provide a suitable installation space for the cutter holder so that the entire cutter blade can be retracted from the bottom surface, and when the lower end of the holder lowered toward the space touches the object, Corresponding to the hardness, the inserting blade has a suitable shape that helps the insertion blade enter the cavity with resistance so that the cutting edge of the object is penetrated to the appropriate depth and protrudes from the holder by an appropriate amount. Adjust resistance pressure,
A frictional resistance mechanism such as a spring-loaded sphere or other suitable pressing spring member, a cushioning material such as rubber, or other suitable frictional member is provided to the blade body, and the cutter blade is brought into contact with the resistance mechanism against the void. The holder is further equipped with a locking mechanism related to a restraining pawl, a tightening screw, or other suitable stopper member for restraining and fixing the inserted blade with an appropriate amount of protruding cutting edge from the outside of the holder. A cutter knife device featuring: