JPH0641012B2 - Intermittent drive - Google Patents

Description

The present invention relates to a press, in particular, a sheet feeding device for punching material in a press, an article feeding device, a filling device for filling, bottle filling, etc., a film packaging device, or a machine tool, a conveyor, The present invention relates to an intermittent drive device used for various machines such as a seamer and a sealer.

Conventionally, such an intermittent drive device has used a mechanism such as an index cam, a Geneva, a non-circular gear, a crank, a cam such as a ratchet, and a link. However, since such a mechanism requires complicated and precise processing, it is expensive and time-consuming to produce, and cannot be adapted to various changes such as timing time, speed and cycle.

The present invention has been made in view of the above circumstances, and it is possible to provide a motor for driving a load by a series of drive pulse signals at low cost and quickly, and at the same time,
An intermittent drive device that can be easily adapted to various changes such as speed and cycle.

That is, according to the present invention, the pinion 30 is attached to the shaft 31 of the rotor 70 of the rotary motor 7v and meshes with the rack 32, and the supports 35, 35, ... Are fixed to the upper surface of the rack 32 at equal intervals. Fingers 37, 37, ... engaging with materials are pivotally attached to these supports 35, 35, ... so as to move up and down, and the computer 1 is provided with an input device 2, a microprocessor 13, and a main program. The stored P-ROM (A) 15 and the P-RO that stores data for variably operating the timer
The computer 1 is provided with an M (B) 16, a RAM 18, and interfaces 20 and 23 for converting input and output to and from each input / output device, and this computer 1 outputs a series of drive pulse signals b and pulse distribution signals c for intermittent drive. The drive pulse signal b is generated, and the drive pulse signal b is generated according to the data of the P-ROM (B) 16.
Each pulse is a series of pulse signals whose density changes substantially in proportion to its speed, and the pulse signals are distributed to the drive circuit 5 of the exciting coils 7a, 7b ... coils 7a, 7b ...... is connected to a high voltage driving power source E ₁ and the low-voltage drive power source E _2, the drive pulse b divides it between the pulse e ₂ of the pulse e ₁ and short duration of the same duration, the exciting coils 7a above short pulse e _2, 7b ......
High-voltage drive power supply E ₁ current flows to each exciting coil 7
a, when the current 7b ...... reaches a predetermined current, and off by comparing a voltage proportional thereto with a reference voltage E _4, thereafter the exciting coil 7a, the low pressure by the time width of the pulse e ₁ to 7b ...... The intermittent driving device is characterized in that a current having a driving voltage E ₂ of 10 is supplied.

Further, each pulse b ₁ of the drive pulse signal b, b _2, ...... time width t _1, t _2, ...... Each time width t ₁ in the rate curve v intermittent driving, t _2, corresponding to ...... The areas to be formed are determined so as to be the same area.

An embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing the outline of the present invention.
Is a computer, 2 is a command a ₁ , such as a start signal, a speed signal, a rotation direction signal, or a synchronizing signal with another device,
It is an input device for sending a ₂ . The computer 1 receives the commands a ₁ and a ₂ to generate a series of intermittent drive pulse signals b and pulse distribution signals c, and the drive pulse signals b and pulse distribution signals c drive current to the exciting circuit 5. Flows, the rotary motor 7 is rotated at a predetermined timing and speed to drive the load 6.

The operation of the device will now be described in more detail.

As shown in the first drawing, the commands a ₁ and a ₂ of the input device 2 are input to the microprocessor 13 of the computer 1 via the interface 23. In the computer 1, a clock pulse of 1 MHz is generated by the crystal oscillator 10 as shown in FIG. 2, and this clock pulse d is transmitted through the shaping circuits 11 and 12 to φ _{1 of} the microprocessor 13,
Input to the φ ₂ terminal, the microprocessor 13 sequentially generates the address signal, and the address signal is transmitted through the address bus 14 to the main program (monitor, drive amount or drive angle of the controlled device) shown in FIGS. P-ROM (A) 15, which stores the program that controls the
TC) P that stores data for variably operating the 24
-ROM (B) 16, RAM18 used as a register of the microprocessor 13, a timer 24 that interrupts the microprocessor 13 to notify the time, and converts the input / output between the microprocessor 13 and each peripheral device Each element is operated with the interface 20 that operates, and the data signal corresponding to the address is transmitted via the data bus 17 to the microprocessor.
13 reads and performs arithmetic writing, resulting in load 6
Are controlled to operate. Thus, the microprocessor 13 outputs the variable-speed drive pulse signal b via the interface 20. The drive pulse signal b is a series of pulse signals whose density changes at a constant period T as shown in FIGS. 8 (a) and 8 (b) in proportion to the speed thereof.

This series of drive pulse signals b is sent to the drive excitation circuit 5 shown in the first and sixth illustrations via the interface 20 shown in the first and fifth illustrations, and the coil 7 of the rotary motor 7 shown in the sixth illustration is shown.
An electric current flows through a, 7b, 7c, 7d and 7e to drive the load 6.

These coils 7a, 7b, 7c, 7d, 7e are driven by a high-voltage drive power source E ₁ and a low-voltage drive power source E ₂ in order to rapidly flow a current when the drive pulse signal b is input. Sixth
Figure b shows a detailed circuit diagram of one coil 7a,
E ₃ indicates a 5V control power supply. When, for example, the pulse b _{1 of} the first time width t ₁ of the drive pulse signal b is distributed so as to flow to the coil 7a, the pulse b ₁ has the same time width t _{1 as} the long pulse e ₁ and the short time width t _1. Pulse of e ₂
Is divided into These pulses e ₁ and e ₂ are input to the drive circuit via the photo couplers P ₁ and P ₂ , respectively, and pulse
The e ₁ turns on the first switching transistor Q ₁ for the same time width t ₁ via the transistor amplifier circuit, and the pulse e ₂ turns on the second switching transistor Q ₁ via the AND circuit A, flip-flop F and the transistor amplifier circuit. The transistor Q ₂ is turned on for a short time t. As a result, first, a strong current instantaneously flows from the high-voltage drive power source E ₁ to the coil 7a via the resistors R ₁ , R ₂ , and R ₃ . Note that the resistance R ₁ ,
R ₂ is a resistor for reducing the time constant of the coil 7a. Thus, when a predetermined current flows, the resistances R ₁ , R ₂ , R
The potential across ₃ rises and this potential is compared to the reference voltage E ₄ and fed back to flip-flop F and AND circuit A, turning off transistor Q ₂ . Therefore, thereafter, current flows from the low-voltage drive power source E ₂ to the coil 7a for t ₁ -t time. In the figure, D ₁ is a diode for preventing backflow, and D ₂ and D ₃ are diodes for absorbing a surge current after the transistor Q _{1 is} turned off.

The rotary motor 7 has, for example, the coils 7a, 7b, 7c, 7d, around the rotor 70 magnetized as shown in FIG.
7e are arranged at equal angular intervals.

Each pulse b ₁ , b in the series of drive pulse signals b
_In the time widths t ₁ , t ₂ , t ₃ , ... Of ₂ , b ₃ , ..., The data stored in the P-ROM (B) 16 is the timer (CT).
C) It is given to 24 and is determined by the time when this timer 24 times up. Such time widths t ₁ , t _2, ... Are periods T in the intermittent drive curve v as shown in FIGS. 8 (a) and 8 (b).
Area A ₁ , A ₂ corresponding to each time width t ₁ , t ₂ , ...
...... is determined so that they have the same area. Stroke curve S
, The stroke lengths corresponding to the respective time widths t ₁ , t _2, ... Are equally spaced. When the velocity V = v (t) is a triangular wave, the i-th time width (Substantially inversely proportional to the square of v (ti)).

Each pulse b ₁ , b ₂ , ... Of the series of drive pulse signals b
Are distributed by the pulse distribution signal c, and each coil 7
Flows through a, 7b, 7c, 7d, and 7e as indicated by the circles in the table below in FIG. 8 (b). As a result, the rotor 70 rotates as shown by the arrow in FIG. 7 and rotates in the forward direction.

When the rotor 70 is rotated in the reverse direction, for example, the drive pulse signal b
.. of the respective pulses b ₉₉ , b ₁₀₀ , b ₁₀₁ , ... Are distributed by the pulse distribution signal c and flow as shown by the mark x in the table below in FIG. 8 (b).

In the above embodiment, the rotary motor 7 is reciprocated at a speed indicated by a triangular wave, but as shown in FIG. You may let me.

In this case, the time width t _i of the i-th pulse b _i of the drive pulse signal b is The data in the P-ROM (B) 16 may be changed so that

FIGS. 10 (a) and 10 (b) show a case where the rotary motor 7v is applied to the material feeding for punching of a press according to the present invention.
The pinion 30 is attached to the shaft 31 of its rotor 70 and meshes with the rack 32. The rack 32 is supported by a fixed rod 33 via a slide bearing 34 so as to reciprocate, and supports 35, 35, ... Are fixed to the upper surface of the rack 32 at equal intervals. These supports 35, 35, ... are attached to the fingers by shafts 36, 36 ,.
37, 37, ... are pivoted to move up and down, and fingers 37, 37,
...... is repelled by springs 38, 38, ...... so as to project upward. 39 is a blank for blanking material, and 40, 40 are guides for this blank.

In this device, the rotor 70 of the rotary motor 7v is the eighth
When reciprocatingly rotated by the intermittent drive curve v shown in FIG.
The rack 32 reciprocates via the pinion 30 of FIG. 0 (a), and the finger 37 first pushes the rear end of the blank 39 to the right by a certain amount in FIG. 10 (a), and then the rack 32 returns. Next finger
37 protrudes by the spring 38 and engages with the rear end of the blank 39, and in the next cycle, the second finger 37 feeds the blank 39 further to the right by a certain amount and feeds the blank 39 by a certain amount toward the press. It is a thing.

As described above, according to the present invention, since the rotary motor for driving the load is driven by a series of drive pulse signals, various machines are intermittently driven without using a complicated mechanism such as a cam or a link. P-ROM in which the data of the computer for generating the series of drive pulse signals is written and which can be provided inexpensively and quickly.
By exchanging the elements, it is possible to easily adapt to various changes in timing time, speed, period, and the like.

That is, in the conventional mechanical index device, the input shaft of the device continuously rotates and the output shaft makes an intermittent motion. At this time, the cam allocation angle (index angle), the stationary angle, the number of stops, the acceleration curve, etc. It is unique to one device, and if one tries to change the number of stops, stroke amount line, velocity curve or acceleration curve, which is different from the original plan after selecting a certain device, the index device, and further it It was necessary to change the design of the mechanical part that does. Therefore, in the place where the realization is desired,
It was very troublesome, and as a matter of fact most of the people were out of hand.

However, in the device of the present application, there is no such complication, and the index angle, the stationary angle, the number of stops, the acceleration curve, etc. are small elements within the drive torque range of the rotary pulse motor. You can change it freely by exchanging 16 and it is very flexible. Further, in the present invention, since the drive coils 7a, 7b ... Are started by the high-voltage drive power source, the rotary motor responds quickly and is turned off when the current reaches a predetermined value, so it is safe and reliable with a strong current. It can be driven by a predetermined amount.

[Brief description of drawings]

FIG. 1 is a block diagram showing an outline of an embodiment of the present invention, FIGS. 2, 3, 4, and 5 are circuit diagrams of respective parts of the computer, and FIG. 6 (a) shows a drive circuit thereof. Wiring diagram, (b) is a circuit diagram showing one of them in more detail, FIG. 7 is an explanatory diagram of a coil in a rotary motor, and FIG. 8 (a) is an intermittent drive speed and stroke curve and drive pulse according to the present invention. A graph showing the relationship between the signal time widths, (b) is a table showing the relationship between the graph of the drive pulse signal b and that flowing through the coil,
Figures (a) and (b) are graphs showing other two examples of the velocity curve, Figure 10 (a) is a side view of an apparatus in which the present invention is applied to feeding a blank of a press, and (b) is ( It is the sectional view on the AA line of a). 30 …… pinion, 7v …… rotary motor, 70 …… rotor, 31 …… axis, 32 …… rack, 35,35 …… support, 37…
... fingers, 1 ... computer, 2 ... input device, 13
...... Microprocessor, 15 ...... P-ROM (A), 16 ...
... P-ROM (B), 18 ... RAM, 20, 23 ... interface, 7 ... rotary motor, 7a, 7b, 7c,
7d, 7e ... rotary motor coil, 5 ... driving circuit, b ... driving pulse signal, c ... pulse distribution signal, T
...... Constant cycle of intermittent drive, t ₁ , t ₂ , ・ ・ ・ Time width, A
Areas corresponding to ₁ , A ₂ , ... t ₁ , t ₂ , ..., E ₁ ...
… High-voltage drive power supply, E ₂ …… Low-voltage drive power supply, E ₄ …… Reference voltage, e ₁ …… pulse, e ₂ …… Pulse with short time width.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification number Office reference number FI technical display location B65G 43/00 A H02P 8/00 Q 9063-5H 304 A 9063-5H (56) References JP-A-49-7045 (JP, A) JP-A-52-137619 (JP, A) JP-A-52-102977 (JP, A) JP-A-49-37111 (JP, A) JP-A-56-166467 (JP , A) JP 54-114686 (JP, A) JP 62-20093 (JP, B2) JP 60-31728 (JP, B2) JP 61-3198 (JP, B2)

Claims (2)

[Claims] 1. A pinion 30 is a rotor 70 of a rotary motor 7v.
Is attached to the shaft 31 of the and meshes with the rack 32.
Supports 35, 35, ... Are fixed to the upper surface of 32 at equal intervals, and fingers that engage with the material are attached to these supports 35, 35 ,.
37, 37, ... are pivotally connected so as to move up and down, and the input device 2, the microprocessor 13, the P-ROM (A) 15 storing the main program, and the timer are variably operated in the computer 1. P-ROM (B) 1 that stores data for
6, the RAM 18 and the interfaces 20 and 23 for converting input and output to and from each input / output device are provided, and the computer 1 generates a series of drive pulse signals b and pulse distribution signals c for intermittent drive. The drive pulse signal b is a series of pulse signals whose density changes substantially in proportion to the speed thereof at every constant period T of intermittent drive according to the data of the P-ROM (B) 16, and this drive pulse signal b is rotated by the pulse distribution signal c. The excitation coils 7a, 7b of the motor 7v are distributed and sent to the drive circuit 5, and the excitation coils 7a, 7b ... Are connected to the high-voltage drive power source E ₁ and the low-voltage drive power source E ₂ , and the drive pulse b Is divided into a pulse e ₁ having the same time width as that and a pulse e ₂ having a short time width, and the short pulse e ₂ causes the current of the high-voltage drive power source E ₁ to flow through the exciting coils 7a, 7b. Coil 7a, 7b ...
When the current of ... reaches a predetermined current, a voltage proportional to it is compared with the reference voltage E ₄ and turned off.
a, 7b ... are low drive voltage E _{2 for} the duration of pulse e ₁
The intermittent drive device is characterized in that the current is supplied. 2. Each pulse b ₁ , b ₂ , of the drive pulse signal b
...... duration t _1, t _2, ...... Each time width t ₁ in the rate curve v intermittent driving, t _2, consisting determined so that the area corresponding to ...... becomes equal areas of the claims The intermittent drive system according to claim 1.