JPS58100013A - Synchronizer - Google Patents

Abstract

PURPOSE:To enhance the synchronization accuracy of a synchronizer for a painting equipment or the like and its safety, by using a fixed frequency divider to divide a clock pulse and using a variable frequency divider to divide an integrated value for a prescribed section of an endless chain and performing control on the basis of an integrated value. CONSTITUTION:A clock pulse sent out from an oscillator 26 is divided by a fixed frequency divider. Integration is effected for a prescribed section of a chain by an integration counter 28 controlled by switches 19, 20 provided in a reciprocator not shown in the drawing. The integrated value C is applied to a variable frequency divider through a divided value automatic setting unit 29 so that the value is divided by the divider. The divided signals are applied to an oscillation counter 31 so that the signals are integrated. When set values N1-N4 for the form, dimensions, etc. of a painted object, which are sent from a digital controller 21, have coincided with counted values, the counter 31 sends out a control signal to open or close a three-way valve 9. Although the constitution is simple, the accuracy of synchronization is enhanced and the safety for prevention of blasting is promoted.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a synchronizing device suitable for use in industrial machinery such as painting equipment and conveying equipment.

Generally, industrial machines such as painting equipment use endless conveyors that are driven by drive devices, but endless chains such as chain conveyors and roller conveyors are usually equipped with synchronizers that synchronize with the speed of the conveyor. For example, in painting equipment, a reciprocating reciprocator with an endless chain is used,
The reciprocator is provided with a coating machine as a working device that reciprocates together with the reciprocator.

Incidentally, the coating apparatus is required to control the spraying of paint from the coating machine according to the shape, size, area to be coated, etc. of the object to be coated, and for this purpose, a synchronization device is provided. That is, the synchronizing device is installed near the motor that operates and engages the endless chain, and generates the output signal from the base pulse oscillator and the output pulse oscillator, which transmits a /J pulse proportional to the rotational speed of the motor. It is composed of a preset counter, etc., which inputs the pulse pulse and outputs an output signal at a predetermined pulse count number set in advance.

The coating machine is provided with a paint hose connected to a paint tank via a switching valve and a paint pump, and the switching valve is opened and closed by an output signal from a presetter counter of the synchronizer. The paint is supplied only when the valve is open, and the sprayer is controlled to spray paint in synchronization with the speed of the registration locator.

The synchronization device according to the prior art is configured in this way, so that
The synchronizer requires a pulse transmitter near the reciprocator motor, but the drawback is that the pulse is disturbed by electromagnetic induction from the motor, making it difficult to obtain accurate /4 pulse transmission. Ta.

Additionally, if the synchronizer is used in painting equipment that handles highly flammable substances such as paint and thinner, the nozzle transmitter must have a flameproof or intrinsically safe structure to prevent the risk of explosion. There were a lot of shortcomings.

The synchronizer of the present invention has improved the drawbacks of the prior art, and is characterized by an oscillator that is installed at a location away from the drive device and that oscillates clock pulses of a constant frequency; A fixed frequency divider that divides the clock pulses and pulses from the oscillator to a predetermined frequency division ratio, an integration counter that integrates the output pulses from the fixed divider only in a predetermined section of the endless chain, and a counter of the & A variable division j that divides the frequency of the 9 pulses from the oscillator using the integrated value as a frequency division ratio.
By consisting of an IiI converter and a transmission counter that integrates the output notars from the variable frequency divider and transmits an output signal at a preset integrated value, it is possible to synchronize with the speed of the endless chain and only for a predetermined period. An object of the present invention is to provide a synchronization device that transmits an output signal.

The synchronizing device of the present invention will be explained below along with the embodiments shown in FIGS. 1 and 2.

FIG. 1 is an external view of the coating device. In the drawing, l is a booth where the painting work is performed, and inside the booth 1 is a reciprocator 4 that has an endless chain 3 built in that rotates in a constant direction at a speed of 2 cm/--c) by a motor 2 as a drive device. A coating machine 6 as a working device is provided to the reciprocator 4 via an arm 5 made of a highly insulating material. The coating machine 6 moves back and forth between the upper and lower ends in accordance with the movement of the endless chain 3 by a reversing mechanism (not shown) of the registration locator 4. Also, 7 is a paint tank, 8 is a paint pump, and 9 is a paint tank.
is a three-way switching valve, and the three-way switching valve is equipped with hoses 10.11.
One end of hose 12 is connected, and the other end of hose 10, 11, and 12 is connected to paint tank 7, paint pump 8, and paint machine 6, respectively, and paint tank 7 and paint pump 8 are connected to hose 13. .

Here, the three-way switching valve 9 is configured so that the flow path can be switched and controlled by a Norms signal from a synchronizer, which will be described later. That is, during painting, the paint in the paint tank 7 is transferred to the hose 13, the paint pump 8, the hose 11, and the three-way switching valve 9.
, hose 12 in order, and when not painting, the paint in the paint tank 7 is supplied to the paint tank 7 again through the hose 13, the paint pump 8, the hose 11, the three-way switching valve 9, and the hose 10 in this order. Switching control is performed to return to .

In addition, lines of electric force are formed between the coating machine 6 and the object to be coated 17, which is connected to a high voltage source 16 that generates a high voltage of, for example, -90 [kV] via a high voltage cable 14. , and coats the area 18 of the object 17 to be coated. 19.20 is a recipe! The limit type switch provided in locator 4, the switch at Cape Chi, and the switch 19, 2
0 are spaced apart from each other by a predetermined distance Y (m ), and are actuated by a protrusion (not shown) provided on the chain 3.

Reference numeral 21 denotes a digital control device of the computer, and 22 a synchronizer. The signals from the switch 19.20 are inputted to the synchronizer @22 via signals @23.24, and the signals from the digital control device 21 are also input. Setting signal is being input. The output signal of the synchronizer @22 is output to the solenoid section of the three-way switching valve 9 via the signal @25.

Here, an electrical circuit diagram of the synchronizer is shown in FIG.

In the drawing, reference numeral 26 denotes a crystal oscillator that oscillates clock pulses with a constant frequency fo, and the clock pulses oscillated from the oscillator 26 are fixed dividers that divide the frequency to a predetermined frequency division ratio X. 27 and a variable frequency divider 30, which will be described later. Reference numeral 28 denotes an integration counter, into which the pulse frequency-divided to the frequency f·/X from the fixed division divider 27 is inputted, and at the same time, the signal from the switch 19.20 is inputted. Integration counter 28 is switch 1
When the switch 9 is activated, it is reset and the integration operation is started, and when the switch 20 is activated, the integration operation is stopped. That is, this integrated value C is C==fo,
It becomes Y. Reference numeral 29 denotes a frequency division ratio automatic setting device, and the frequency division ratio automatic setting device 29 has a function of temporarily storing the cumulative value C of the cumulative counter 28 until the switch 19 is reset. The integrated value C is output as the division ratio of the variable division divider 30.

Further, the variable frequency divider 30 divides the frequency of the black and white pulses oscillated from the oscillator 26 by the division ratio C==7e@Y output from the automatic division ratio decider 29. In other words, the distance Y between switches 19 and 20 and the speed of chain 3 are determined based on the premise that chain 3 rotates at a constant speed until switch 19 operates again. 2, determine the division ratio C of the variable frequency divider 30. Therefore, from the variable frequency divider 30, fv
A pulse of a frequency is output. Reference numeral 31 inputs the frequency from the variable frequency divider 30 and also inputs a set value N from the digital control device 21 such as a computer. This set numerical value N is arbitrarily set depending on the dimensions and shape of the object 17 to be coated, and when the number of pulses of the transmitting counter 31 reaches this set numerical value, the transmitting counter 31 sends an output signal to the switching valve 9 via the signal a25. Output against. This setting operation is performed using four numbers N@ * N snow + Ns as shown in the figure.
*Na is input from the digital control device i21 to the transmission counter 31 as the set numerical value N. Then, the count number of the transmission counter 31 and the numerical value N1 * Nl e N
When s * N4 respectively match 17, an output signal is sent, the switching valve 9 is opened with the number, value N1, and paint is supplied to the coating machine 6 which is in the upward stroke, and the switching valve 9 is opened with the number N3.
Close the valve. Similarly, the switching valve 9 is closed at the numerical value N3, paint is supplied to the coating machine 6 which is in the downward stroke, and the switching valve 9 is closed at the numerical value N4. As a result, the portion 18 of the object 17 to be coated is
Paint only between.

The present invention is constructed as described above, and the endless chain 3 is driven by the motor 2, and the coating machine 6 provided on the arm 5 reciprocates between the upper and lower ends of the reciprocator 4. . In the synchronizer, clock pulses are constantly oscillated from the oscillator 26, and this clock pulse with a frequency of f is divided by the fixed divider 27 to a frequency of f. The frequency ef. counter 3
1 has set numerical values N1-N4 inputted from the digital control device 21 according to the shape, dimensions, etc. of the object to be coated.
When the coating machine 6 reaches the position to be painted, the transmission counter 31
The count is N1r Nl + N @ *
When the pressure reaches N 4 , an output is transmitted, the three-way switching valve 9 is opened and closed, and the coating machine 6 paints only the section 18 of the object 17 to be coated. Since it is controlled based on the constant frequency pulses from the oscillator 26, the operation of the sprayer 6 can be reliably synchronized in accordance with the amount of movement even if the required speed of the reciprocator 4 increases.

In addition, the resolution of the displacement position at which the paint sprayer 6 operates can be calculated as follows, so the resolution can be changed over a wide range as necessary. Set the frequency f- to 10 (kHz
':l, the frequency division ratio For example, the value of the automatic frequency division ratio setter 29 is 10 (kHz) = 100 (Hz) 00, and the frequency fv of the base pulse output from the variable frequency divider 30 is 10 (kHz) = 100 (Hz) 00, and 100 (Hz) per second. ) is input to the transmission counter 31 and integrated. By the way, since the time required for one cycle of this Noyalus is 17100 (s@e), the resolution of the synchronizer 22 is 1/100 of this [
The displacement of the coating machine 3 during 5ec) is the displacement I Cm/5ee) X 1/100 [:s@e
:]=10[-]. This resolution can be easily changed by changing the division ratio X of the fixed frequency divider 27, etc. Furthermore, unlike the prior art, the synchronizer 22 does not need to provide a latch transmitter near the motor 2, and a limit-type cape switch 19 is provided near the chain 3.
, 20, the structure is simple.

In the embodiments of the present invention, the synchronizing device 22 has been described as being installed in a coating device, but the synchronizing device 22 is not limited to this, and can be used, for example, in an endless conveyor conveying device for conveying workpieces, a coating opening cut, a welding opening, etc. ) may be provided for the working iron amount. Furthermore, although it has been described that the reciprocator 4 is provided with two switches 19 and 20, if one rotation of the chain 3 is one cycle and only that period is a predetermined period in which the integration counter 28 is operated, one switch is required. In this case, the previous integrated value may be reset and integrated simultaneously by the switch operation, and the previous integrated value may be outputted from the automatic dividing ratio setter 29 to the variable divider 30 as the dividing ratio. Furthermore, although the present invention has been applied to the control of one object to be coated using the nine coating apparatuses Fi, it is of course possible to perform multiple controls when the shape of the object to be coated is complex.

The synchronization device according to the present invention is as described in detail above, and includes an oscillator that oscillates a black pulse with a constant wave number, and a frequency divider that divides the black pulse from the oscillator to a predetermined frequency division ratio. a fixed frequency divider, and an integration counter that integrates the output/flux from the fixed frequency divider only in a predetermined section of the endless chain;
A variable frequency divider that divides the clock and Δ pulses from the oscillator using the integrated value of the integration counter as a division ratio, and a variable frequency divider that integrates the clock and Δ pulses from the variable frequency divider and outputs at a preset integrated value. Since it is controlled on a configuration basis from the transmitting counter which emits the signal, a reliable synchronization is obtained depending on the speed of the endless chain or reciprocator.

: ■ Unlike conventional technology, there are no
There is no need to install a transmitter, just a simple switch such as a limit switch.■ Even when used in equipment that handles highly flammable substances such as painting equipment, the reciprocator has an explosion-proof structure. There is no need to provide a transmitter, and safety can be improved.

[Brief explanation of drawings]

1 and 2 show a synchronizing device according to the present invention, FIG. 1 is an external view of a painting device in which the synchronizing device is used, and FIG. 2 is a circuit diagram of the synchronizing device.・
Motor, (drive device), 3... Endless chain, 6...
・Grave mounting machine, 19.20...Limit switch, 22・
... Synchronizer, 26 ... Oscillator, 27 ... Fixed frequency divider □, 28 ... Integration counter, 30 ... Variable frequency divider, 31 ... Oscillation counter.

Claims (4)

[Claims] (1) In a synchronizing device that emits an output signal only in a preset period in synchronization with the speed of an endless chain driven by a driving device, an oscillator that oscillates a clock pulse of a constant frequency; a fixed frequency divider that divides a clock pulse from an oscillator to a predetermined frequency division ratio; an integration counter that integrates output pulses from the fixed frequency divider for a predetermined section of the chain; A variable frequency divider divides the clock pulses from the oscillator using the integrated value of the counter as a frequency division ratio, and a variable frequency divider that divides the clock pulses from the oscillator, and integrates the output pulses from the variable frequency divider and calculates a preset integration value. 1. A synchronizing device comprising: a transmitting counter that transmits an output signal at a certain value. (2) The conveyor is provided with two switches separated by a predetermined distance, and when the - switch is activated, the integration counter is reset and the integration operation is started, and the other switches are activated. Claim (1) configured to stop the integration operation by
Synchronization device as described in section. (3) The chain is provided with one switch, and each time the chain rotates once, the integration counter is reset and an integration operation is started. Synchronizer as described. (4) A patent in which the endless chain is a reciprocator for painting, and the reciprocator is equipped with a coating machine, and is configured to spray paint only in a predetermined area preset by the output signal of the transmission counter. Scope of claims (1)
Synchronization device as described in section.