JPH0141589Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" This invention relates to a round blade contact pressure adjusting device suitable for use, for example, in cutting magnetic tape and the like.

"Conventional technology" In the production of tapes (magnetic tape, etc.),
There is a process of cutting a wide original fabric into a predetermined tape width, and in this cutting process, a cutting device is generally used that is equipped with a plurality of pairs of circular blades that interlock and rotate in the width direction of the original fabric. In this case, the degree of cutting of the cutting device largely depends on the degree of engagement between the pair of round blades.

Here, FIGS. 3A and 3B are a side view and a front view, respectively, showing the configuration of a conventional cutting device.

In this figure, 1, 1, . . . are upper blades attached to the upper blade holder 2 at predetermined intervals, and 3 is a rotating shaft to which the upper blade holder 2 is attached. In this case, the interval between the upper blades 1, 1 corresponds to the tape width after cutting the original fabric. Both end portions of the rotating shaft 3 are rotatably supported by upper blade bearing boxes 4, 4, and the bearing boxes 4, 4 are attached to a support column 5. Furthermore, an upper pulley 6 for transmitting driving force and an offset adjustment mechanism 7 for adjusting the amount of axial offset of the rotating shaft 3 are provided at the right end and left end of the rotating shaft 3, respectively. Reference numeral 7a is a handle for adjusting offset, and by operating this handle 7a, a desired offset amount can be set. The upper blade unit 8 is constituted by each of the above-mentioned components 1 to 7.

Next, 10, 10, . . . are lower blades that are respectively provided at predetermined intervals on the rotating shaft 11 and configured to mesh with the above-mentioned upper blades 1, 1, . Both ends of the rotating shaft 11 are rotatably supported by lower blade bearing boxes 12, 12, respectively, and the lower blade bearing boxes 12, 12 are attached to a fixed plate 13. A lower pulley 14 is provided at the right end of the rotating shaft 11 and transmits the rotation of the rotating shaft 11 to the upper pulley 6. Further, driving force is transmitted to the left end of the rotating shaft 11 from a motor (not shown), and the driving force of this motor is transmitted to the rotating shaft 3 via the lower pulley 14 and the upper pulley 6. It's becoming like that. The lower blade unit 15 is constituted by each of the above-mentioned components 10 to 14. Further, the lower surfaces of the upper blade bearing boxes 4, 4 and the upper surfaces of the lower blade bearing boxes 12, 12 are joined via metal spacers 16, 16, thereby connecting the upper blade unit 8 and the lower blade unit 8. The blade unit 15 is integrated.

Next, a description will be given of an operation for adjusting the engagement between the upper blade and the lower blade in the conventional cutting device described above.

FIG. 4 is an enlarged sectional view of the upper blade 1 and the lower blade 10, and in the figure, 20 indicates the upper blade 1 with the upper blade holder 2.
It is a disc spring that presses against the right end surface of the To adjust the mesh in this case, first, the operator must set the upper blade 1 and lower blade 1.
0, turn the adjustment handle 7a to move the rotating shaft 3 in the direction of the arrow in the drawing, and
... is brought into contact with the lower blades 10, 10.... After the contact, while looking at the scale provided on the adjustment mechanism 7, further adjust the adjustment handle 7a.
, thereby bending the disc spring 20,
The contact pressure between the upper blade 1 and the lower blade 10 is set to a desired value. In this case, the relationship between the amount of movement of the upper blade 1 from the contact point and the contact pressure due to the elastic force of the disc spring 20 is as follows.
Since the relationship is uniquely determined by the characteristics of the disc spring 20, a desired contact pressure can be obtained by setting the amount of operation of the adjustment handle 7a to a predetermined value.

"Problems to be Solved by the Invention" By the way, in the engagement adjustment operation of the conventional device described above, the upper blade 1 is moved little by little, and the point at which the gap between the upper blade 1 and the lower blade 10 is no longer visible is detected. Since these contact points are used, there are disadvantages in that the operability is poor and it takes time, and there is also a problem in that visual judgment of the contact points requires skill. Furthermore, since visual contact point determination inevitably involves errors, there is a problem in that the set values of the contact pressures of the upper and lower blades vary, which tends to cause excess or deficiency in the contact pressure. In this case, the contact pressure between the upper and lower blades is
Since there is an optimum value depending on the type of web and each cutting condition, excessive or insufficient contact pressure is extremely problematic as it may lead to poor cutting.

This invention was made to solve the above-mentioned problems, and does not require operator skill.
The purpose is to provide a round blade contact pressure setting device that can set the contact pressure of the upper and lower blades to an optimal value in a short time.

"Means for Solving the Problem" In order to solve the above-mentioned problem, this invention is a round blade contact pressure adjustment that presses one side against the other and thereby adjusts the contact pressure of the pair of round blades. In the apparatus, electrical continuity is detected between a round blade moving motor that moves the one round blade toward the other round blade and the one round blade and the other round blade, and thereby the contact point detection means for detecting a contact point between a pair of round blades; and after contact is detected by the contact point detection means, the movement motor is configured to move the one of the round blades by a predetermined amount. and a motor control means for supplying a drive amount control signal to the motor.

"Operation" Contact between a pair of round blades is detected by detecting continuity between them, and after the point of contact is detected, one of the round blades is transported by a predetermined amount by a motor, and this The contact pressure is set by .

"Embodiments" Hereinafter, embodiments of this invention will be described with reference to the drawings.

FIG. 1 is a front view showing the configuration of an embodiment of this invention. In addition, in Figure 1, Figure 3 A,
Components corresponding to those in FIG.

In FIG. 1, reference numeral 24 denotes an offset adjustment mechanism for adjusting the amount of offset of the rotating shaft 3, and is driven by a pulse motor 25. That is, in the case of this embodiment, when the pulse motor 25 is driven, the rotating shaft 3 moves in the left-right direction in the drawing in accordance with the rotation direction thereof. Next, 26 is a spacer made of an insulator such as ceramic. In this case, the upper blade unit 8 and the lower blade unit 15 are electrically insulated by a spacer 26. Further, the other mechanical configurations of this embodiment are similar to the conventional apparatus shown in FIGS. 3A and 3B and FIG. 4.

Next, regarding the electrical configuration of this example, the second
This will be explained with reference to the figures. In FIG. 2, parts corresponding to those in FIG. 1 are designated by the same reference numerals, and their explanations will be omitted.

Reference numerals 30 and 31 shown in FIG. 2 are conductive wires, one end of which is connected to the upper blade bearing box 4 and the lower blade bearing box 12, and the other end of each is connected to input ends 32a and 32b of the control circuit 32. has been done. In this case, since the upper blade unit 8 and the lower blade unit 15 are all made of metal members, the upper blade unit 8 and the lower blade unit 15 are all made of metal members. During this period, each is in a conductive state. In addition, the control circuit 3
2 applies a voltage to the conducting wires 30 and 31 and checks whether there is continuity between these conducting wires, and
This circuit drives the pulse motor 25 based on this conduction result and a preset value of the upper and lower blade contact pressures.

Next, the operation of this embodiment with the above configuration will be explained.

First, in the initial state, the upper blade 1 and the lower blade 10
and keep them in a non-contact state. Next, the control circuit 3
2 supplies a slow speed drive pulse to the pulse motor 25, thereby driving the upper blades 1, 1, . . . in the direction of the arrow shown in FIG. When the upper blade 1 comes into contact with the lower blade 10, the input terminals 32a and 32b become electrically connected, and the control circuit 32 detects this.
Next, the control circuit 32, after detecting the conduction state,
A drive pulse for extremely low speed is supplied to the pulse motor 25 to drive the upper blade 1 at extremely low speed in the direction of the arrow.
In this case, the number of extremely slow speed drive pulses output by the control circuit 32 corresponds to the contact pressure value preset in the control circuit 32. and,
When the pulse for ultra-low speed is output, the upper blade 1 accurately moves by a distance corresponding to the number of pulses of the drive pulse for ultra-low speed. That is, after the upper blade 1 comes into contact with the lower blade 10, it moves by an amount corresponding to the set contact pressure value in the control circuit 32, thereby setting the upper and lower blade contact pressure by the disc spring 20 (see FIG. 4). matches the value. After the upper blade 1 has moved a predetermined amount, the pulse motor 25 stops and
The upper blade brake mechanism (not shown) operates to fix the position of the upper blade 1, and then the cutting operation of the original fabric is started.

As can be seen from the above, in this embodiment, the contact point between the upper blade 1 and the lower blade 10 can be accurately detected, and the amount of movement of the upper blade 1 after the contact point is detected is also controlled by the pulse motor 25. Since it can be precisely controlled by the number of supply pulses, the upper and lower blade contact pressure values can be matched very precisely to the settings. Further, in this embodiment, there is an advantage that the movement amount control of the upper blade 1 is automated, and there is also an advantage that this movement amount control can be easily controlled remotely.

In the above embodiment, the upper blade unit 8 and the lower blade unit 15 are insulated by the spacer 26 made of ceramic or the like, but the outer walls of the bearing boxes 4 and 12 are made of an insulating material. The upper blade unit 8 and the lower blade unit 15 may be configured to be insulated by this.However, in this case, one end of each of the conductive wires 30, 31 is Connect to the part that is electrically connected to the blade 10. In addition, each unit may be insulated by other methods; in short, the upper blade 1 and the lower blade 1
It is sufficient if the structure is such that contact with 0 is detected by conduction between them.

Further, in the above embodiment, the upper blade 1 is driven by the pulse motor 25, but instead of this, the movement of the upper blade 1 may be controlled using another servo motor or the like.

Furthermore, in the embodiment described above, the upper blade 1 was configured to press the lower blade 10 via the disk spring 20 (elastic member), but this invention
Of course, it can also be applied to a configuration in which the lower blade 10 is directly pressed without using an elastic member or the like (contact pressure adjustment by the elastic force of the upper blade 1 and the lower blade 10 themselves).

"Effects of the invention" As explained above, according to this invention, one of a pair of round blades, which are provided so that their portions face each other, is pressed against the other, thereby reducing the contact pressure between the pair of round blades. In the round blade contact pressure adjusting device, a round blade moving motor that moves the one round blade toward the other round blade side and electrical continuity between the one round blade and the other round blade are provided. a contact point detection means for detecting a contact point between the pair of round blades; and a contact point detection means for detecting a contact point between the pair of round blades; Since the motor is equipped with a motor control means that supplies a drive amount control signal to the moving motor, no skill is required to detect the contact point, and the contact pressure between the pair of round blades can be optimized in a short time. Can be set to a value.

[Brief explanation of the drawing]

Figure 1 is a front view showing the configuration of an embodiment of this invention, Figure 2 is a block diagram showing the electrical configuration of the same embodiment, and Figures 3 and 3 show the configuration of a conventional cutting device. A side view, a front view, and FIG. 4 are enlarged sectional views of the upper blade 1 and the lower blade 10 shown in FIG. 3. 25...Pulse motor (round blade movement motor),
26... Spacer (contact point detection means), 32...
Control circuit (contact point detection means: motor control means).

Claims (1)

[Scope of utility model registration request] A round blade contact pressure adjustment device that presses one of a pair of round blades provided so that a portion thereof faces the other, thereby adjusting the contact pressure of the pair of round blades. Detecting electrical continuity between a motor for moving the round blade to the other round blade and the one round blade and the other round blade, thereby detecting a contact point between the pair of round blades. contact point detection means, and after contact is detected by the contact point detection means, supplying a drive amount control signal to the moving motor so that the amount of movement of the one round blade becomes a predetermined amount; A round blade contact pressure adjusting device characterized by comprising a motor control means.