JPS6336437Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Field of the invention This invention produces products by sequentially processing unfinished products transported by a conveyor in a plurality of processing areas provided along the transport path of the conveyor. The present invention relates to a production amount display device that displays the production amount of articles in assembly line operations.

(b) Prior art In the case of the above-mentioned assembly line work, for example, to determine the daily production amount, it is necessary to count the amount of the final finished products, or to measure the finishing time of the final finished products using a stopwatch. It was calculated by artificially measuring the number of finished items per interval or unit time.

In this case, it is necessary to measure each time the processed article changes and the conveyance speed of the article is changed, and the calculation accuracy is low if calculated manually, and the reliability of the calculation is low.
The problem was that the work was complicated.

(c) Purpose of the invention The purpose of this invention is to provide a production amount display device that can accurately and easily display production amounts numerically.

(d) Structure of the invention This invention consists of a setting circuit for setting the conveyance interval of articles by a conveyor, a pulse generation circuit for outputting a pulse proportionally to the conveyance interval of articles by this setting circuit, and a predetermined time period of the pulse. The production amount display device is characterized by comprising a counting circuit for counting hits, a placement command means for instructing article placement at the above-mentioned transport interval, and a display for numerically displaying the above-mentioned counted value.

(e) Effects of the invention According to this invention, when the conveyance interval of articles by the conveyor is set by the setting circuit, proportionally corresponding pulses are output from the pulse generation circuit according to this setting, and the operator can control the above-mentioned placement command means. Just by placing the goods on the conveyor based on the command, the counting circuit counts the above-mentioned pulse output and displays this count value on the display, so the amount of goods produced per preset time can be accurately determined. displayed, and set this predetermined time to 1
By setting the daily working time to 8 hours, for example, or any other desired predetermined time, the amount of goods produced per day or per desired predetermined time can be grasped at a glance.

Furthermore, even if the conveyance speed of the article changes in response to a change in the processing process, the production amount of the article corresponding to the change can be displayed by simply changing the setting circuit described above in response to this change. .

Furthermore, if you set a production target number in advance and aim to produce at that target number, you can set the setting value on the setting circuit so that the display value on the display matches the target number. By processing the articles at the indicated conveyance intervals, the work speed for producing the target number can be easily obtained, and production can be accurately increased to the target number.

(F) Embodiment An embodiment of this invention will be described below in detail based on the drawings.

The drawing shows an article production quantity display device in the processing of an electric unit. In FIG. 1, a belt conveyor 1 is driven by the output of a motor 3 via a speed reducer 2. Note that the speed reduction gear 2 described above is variable in speed.

Work areas A to E are set on the conveyance path of the belt conveyor 1 described above, and area A carries the articles 4 to the conveyor 1.
Areas B, C, and D are placed on top of the conveyor, and areas B, C, and D are processed appropriately on the conveyor, or conveyor 1 to article 4
The items are taken out, processed on a workbench (not shown), and placed on the conveyor 1 again.
Work to remove the.

Note that, after the above-mentioned article 4 is processed once each in the working areas B, C, and D, it is placed on the belt conveyor 1 again and processed a second time in the areas B, C, and D, and furthermore, This second processing is different in content from the first processing, and it is assumed that such operations are repeated several times to produce a finished article.

Of course, if each machining process has a different content and a different machining time, the speed is adjusted by the speed reducer 2 in accordance with the machining time.

A controller 5 is provided in front of the aforementioned work area A, and as shown in FIG.
and a buzzer 7 as a placement command means that outputs the placement interval set by the dial 6 with an oscillating sound.
A production amount indicator 8 corresponding to the placement interval of the articles 4 is provided. The production quantity display 8 displays, for example, the number of products produced in a day when the working hours in a day are 8 hours, using a decimal value.

FIG. 3 shows a control circuit of the controller 5 mentioned above.

The motor rotation speed measurement sensor 9 is a circuit that outputs n pulses per revolution of the output shaft of the motor 3. For example, a disc body is attached to the above-mentioned output shaft, and a large number of pulses are mounted around the disc body. It is constructed by a well-known pulse generator in which slits are formed at equal intervals and are detected by a photoelectric sensor.

The waveform shaping circuit 10 shapes the pulse from the previous stage into a rectangular wave and outputs it.

The process width selection circuit 11 divides the frequency of the pulse from the previous stage and outputs it. This frequency division is set corresponding to the deceleration of the reducer 2 described above. For example, when the deceleration of the reducer 2 is
If it is set to 10 steps, this circuit 11 also
It is set in 10 stages, and each frequency division is set to correspond to the deceleration of each stage.

The programmable counter 12 has the frequency of the pulse from the previous stage divided by a predetermined value, and this predetermined value is the interval at which the articles 4 are placed on the conveyor 1, and the buzzer 7 is driven by the output of the counter 12. .

Then, in synchronization with the buzzer sound from the buzzer 7, the worker in the work area A transfers the article 4 to the conveyor 1.
Place it on.

The oscillation circuit 13 always oscillates pulses at a constant predetermined frequency.

The process width selection circuit 14 divides the frequency of the pulse from the previous stage and outputs it, but this frequency division is set corresponding to the deceleration of the reducer 2 described above, and as in the example described above, the frequency of the pulse is divided and outputted.
If deceleration is set in 10 stages, this circuit 14 is also set in 10 stages, and each stage of deceleration is also set to correspond to each frequency division.

The above-mentioned process width selection circuit 14 and the above-mentioned process width selection circuit 11 are interlocked and operated by the setting dial 6.

The N-ary counter 15 counts the pulses from the previous stage, and this count value is calculated by counting for a predetermined period of time.
This count value becomes the value indicating the production amount.

The reference rotation speed setting circuit 16 frequency-divides the pulses from the motor rotation speed measuring sensor 9, but this frequency division is based on m rotations of the motor, and is based on the product of n pulses of one rotation of the motor and m rotations, that is, m×n. Divide the frequency by

The latch pulse generation circuit 17 generates a start pulse for starting the N-ary counter 15 based on the pulse output from the previous stage, and the delay circuit 18 delays this pulse for a predetermined time and outputs it.
The clear pulse generating circuit 19 generates a clear pulse for clearing the N-ary counter 15 based on the delayed pulse.

As a result, the N-ary counter 15 counts from the start pulse to the clear pulse, and the counting time becomes the delay setting time of the delay circuit.

When this delay setting time is set as a shortened time corresponding to, for example, one day's working hours, the oscillation circuit 13
The frequency of the pulse is also set so that a predetermined high-speed pulse is output in accordance with the above-mentioned shortened time.

The production amount display 8 converts the binary code in the previous stage into a decimal value and displays this, and this displayed value becomes the daily product production value.

In the display device configured as described above, the conveyance speed of the conveyor 1 is first set by the reducer 2 in accordance with the workpiece 4, and then the setting dial 6 is set in accordance with the deceleration of the reducer 2.

With this setting, the buzzer 7 emits a sound, and in synchronization with this sound, the worker places the article 4 on the conveyor 1 and performs the specified processing work in each work area B, C, and D. In the post-work area E, the articles 4 are unloaded from the conveyor 1.

In the setting of the dial 6 mentioned above, the N-ary counter 15 counts the pulses for one day's working hours, and the display 8 displays this in decimal value, thereby indicating the number of pulses for one day's work. Production volume can be grasped.

Also, the processing of article 4 changes, and therefore article 4
When the conveyance speed is changed, the production amount at that time is displayed on the display 8 by setting the setting dial 6 accordingly.

In this way, unlike the means of directly applying radiation to the article, the production amount can be accurately calculated numerically by simply placing the article on the conveyor 1 in synchronization with the buzzer sound of the buzzer 7 as the above-mentioned placement command means. There are effects that can be displayed.

In addition, in the above embodiment, an example of grasping the daily production amount was described, but conversely, if you want to set the daily production target number in advance and obtain the work speed to produce this amount, first set the production amount. Display 8 by dial 6
If you operate so that the displayed value becomes the target number mentioned above, and read the setting value of dial 6 at this time, you can easily obtain the working speed, and if you adjust the deceleration of reducer 2 to that working speed. , it is possible to accurately produce the target number of products.

In short, simply by placing the article on the conveyor based on the command from the placement command means, the display is performed by the above-mentioned signal processing, regardless of slight deviations in the position, angle, and direction of the article placement. This has the advantage that the above-mentioned display can be performed accurately.

Further, in the above-described embodiment, the delay circuit 18 is set to display the production amount for one day, but it may be configured to display the production amount for one hour or a predetermined time.

Furthermore, although the articles 4 are placed in synchronization with the buzzer sound, a marker corresponding to the placement interval may be attached to the conveyor 1, and this marker may be used as a placement command means.

Furthermore, a pulse generator is provided on the drive shaft of the conveyor after the speed reducer to output pulses corresponding to the conveyance speed of the conveyor, and these pulses are output at intervals corresponding to the intervals at which articles are placed on the conveyor. If this is counted for a predetermined period of time, this can be used as the production amount per predetermined period of time, and this invention is not limited to the structure of the above-mentioned embodiment.

[Brief explanation of the drawing]

The drawings show one embodiment of this invention, and FIG. 1 is a schematic plan view of a belt conveyor, FIG. 2 is a front view of a controller, and FIG. 3 is a control circuit block diagram of a production amount display device. 1... Belt conveyor, 4... Article, 6... Setting dial, 7... Buzzer, 8... Display, 1
1, 14... Process width selection circuit, 13... Oscillation circuit, 15... N-ary counter, 17... Launch pulse generation circuit, 18... Delay circuit, 19... Clear pulse generation circuit.

Claims (1)

[Claims for Utility Model Registration] A setting circuit for setting the conveyance interval of articles by a conveyor; a pulse generating circuit for outputting pulses in proportion to the conveyance interval of articles by this setting circuit; A production amount display device comprising: a counting circuit for counting, a placement command means for instructing article placement at the above-mentioned conveyance interval, and a display for numerically displaying the above-mentioned counted value.