JPH01228737A - Supply device for screw or the like - Google Patents

Abstract

PURPOSE:To prevent a screw from being left to be unfastened due to a working error by an worker, in a supply device for automatically extracting screws or the like one by one onto a take-up position, by counting and displaying a cycle number of extraction of screws by the worker, and by displaying the cycle number. CONSTITUTION:A screw supply device 1 is composed of a detection switch for detecting the extraction of screws 2 one by one from a take-out device 4, a preset switch 15 for presetting a number of screws in one set, a counter, a set-repeat display section (display means) 17 for indicating a cycle number of extraction of the screws 2 and an alarm (alarming means) 18. Accordingly, the supply devices counts a cycle number of extraction of screws 2 which are successively taken out from the take-out device 4 by the worker with the use of a magnet driver or the like, and the display means 17 displays thereon an order number of a taken-out screw in one set having been preset. When the number of the one set has been counted, the alarm 18 is energized. Further, when the worker depresses a compensating switch 20, the number of the alarm 18 is compensated.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention automatically supplies so-called screws such as screws and rivets to a take-out position one after another, and from the take-out position, the screws are removed one by one using a magnetic driver or the like. This invention relates to a supply device for screws that can be taken out one by one.

[Summary of the invention]

The present invention provides a screw supplying device including a supply means for automatically sequentially supplying the screws to the take-out position in synchronization with the screws being taken out one by one from the take-out position. A counter is preset in advance with a value for one set of screws to be taken out, and the counter is driven by detecting that the screws are taken out one by one from the take-out position, and the counter is preset. By notifying the worker with a buzzer, lamp, etc. when the value for one set has been reached, it is possible to prevent workers from forgetting to tighten screws due to mistakes during screw tightening work, and to improve process management. This makes it possible to track the number of passing assembly sets.

[Conventional technology] This is the conventional technology for this type of screw supply device.

For example, the applicant of the present invention previously applied for Japanese Patent Application Laid-Open No. 62-2
There is a publication No. 08836.

The screw supply device of this prior application has a chute or the like that automatically supplies the screws one by one to the take-out position in synchronization with the screws being taken out one by one from the take-out position using a magnetic driver or the like. This is a screw supply device equipped with a supply means.

According to this screw supply device, when tightening screws on the assembly line of various devices, the worker takes out the screws one by one from the extraction position using a magnetic screwdriver, etc., and sets the assembly. (The work can be done extremely efficiently.)

[Problem to be solved by the invention]

However, the screw supply device of the prior application did not have any function to sequentially count and display the number of times a worker took out the screws from the pick-up position using a magnetic screwdriver or the like. Raising awareness of screw tightening work 1. It was easy for workers to forget to tighten screws due to mistakes. There is also one worker and a manager.

There was a problem in that it was impossible to read the number of passing assembly sets during the process.

SUMMARY OF THE INVENTION An object of the present invention is to provide a screw supply device that can sequentially count and display the number of times a single worker sequentially takes out screws from a take-out position.

[Means for Solving the Problems] In order to achieve the above object, the screw supply device of the present invention includes a detection switch that detects that screws are taken out one by one from the take-out position, and a detection switch that detects when the screws are taken out one by one from the take-out position; A counter that can be preset and driven by a signal supplied from the detection switch; This device is equipped with a display means driven by a counter to display the number of times screws are taken out from the take-out position, and a notification means to inform that the counter has reached a preset value for one set.

Further, it is also possible to include a correction switch that can return the numerical values of the counter and display means to the previous numerical values.

Further Iζ again. The above counter is preset above 1
It is also possible to provide a second counter that is driven every time the value for the set + CS, and a second display means that is driven by the second counter and displays the total number of sets.

[For production]

The screw supply device is configured as described above.

The number of times an operator takes out screws from a take-out position one by one using a magnetic screwdriver or the like is counted by a sequential counter, and the display means displays the number of preset values for one set. If the numerical values for one set are different, a notification means such as a buzzer or a lamp will notify the user.

Further, the operator can correct the numerical values of the counter and display means by one-touch operation of the correction switch.

Yet again. The total number of sets can also be displayed by the second display means.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention applied to a screw supply device for automatically supplying T-screws will be explained based on the drawings.

First, FIG. 1 shows the entire screw supply device 1. As shown in FIG. This screw supply device 1 is supplied with screws 21 by an appropriate screw extractor S (both not shown) from a built-in hopper.
The head screw 2 is automatically taken out, and the taken-out screw 2 is delivered to the take-out position 4 by a supply means 3 constituted by, for example, a shooter.
It is configured to automatically supply continuously from the direction of arrow a. Note that a driver guide 5 for guiding the tip of a magnetic screwdriver or the like is provided at a position directly above the take-out position 4.

Next, FIG. 2 shows the stopper 7 provided at the take-out position 4. This stopper 7 is configured to be freely rotatable in the directions indicated by the arrows A and b' about the fulcrum shaft 8, and is urged to rotate in the direction indicated by the solid line by a return spring 9, which is a torsion coil spring. Configured to be stopped. Note that a triangular screw locking portion 7a is provided at the tip of the stopper 7.

Then, the supply means 3 consisting of a chute supplies the screws 2 in a daisy-chain state from the direction of the arrow a to the take-out position 4 by the falling action of its own weight, and the most advanced screw 2 is brought into contact with the screw locking part 7a of the stopper 7 and taken out. It is fixed at position 4.

Then, in the screw tightening work, one worker inserts the tip of a magnetic screwdriver or the like from directly above the screw 2I at the extraction position 4 shown in Fig. 2 while guiding it with the driver guide 5 shown in Fig. 1. After the screws 2 are engaged at the extraction position 4, the screws 2 at the extraction position 4 are extracted in the direction of the arrow a as shown by the dashed line in FIG. 2 using a magnetic screwdriver or the like. At this time,
The stopper 7 is rotated in the direction of the manufacturing arrow ' from the position indicated by the solid line to the position indicated by the dashed-dotted line against the return spring 91, and then immediately returned to the position indicated by the solid line by the return spring 9 in the direction indicated by the arrow. Then, in synchronization with the removal of the screws 2, all the screws on the supply means 3 automatically advance by one pitch in the direction of arrow a in a daisy chain state due to the falling action of their own weight, and the primary screw 2 automatically moves to the removal position 4. supplied.

Next, FIG. 3 shows the detection switch 11 provided at the extraction position.
This detection switch 11 is constituted by, for example, a -7 switch.This detection switch 11 is configured such that each time the screws 2 at the extraction position 4 are taken out one by one with a magnetic screwdriver or the like, The stopper 7, which is rotated in the direction of arrow b' from the position indicated by the solid line in FIG. 2 to the position indicated by the one-dot chain line, is turned on as shown by the one-dot chain line in FIG.

The removal of one of the two and 22 pieces is detected.

The fifth worker performs a screw tightening operation in which the screws 2 taken out from the take-out position 4 are held by a magnetic driver or the like and sequentially tightened at predetermined locations on the assembly set on one assembly line.

Next, as shown in FIG.
Main power supply 2 pumps 13. Counter power switch 14.7'
Reset switch 15.17 Set switch 161 Set 11 beat display section 17. Alarm 18, which is a notification means. Alarm volume adjustment volume 19. No count switch 20 which is a correction switch. A set total display section 21, a clear switch 22, etc., which are second display means, are provided.

Next, the control circuit of the screw supply device 1 shown in FIG. 4 will be explained.

[Presetting]

First, the main power switch 12 and counter tS switch 14 are turned on.

Next, set the preset switch 15 to a value corresponding to one set, which is the number of screws 2 used in one assembly set.

Finally, turn on the reset switch 16YON.

Then, the 1 selected by the preset switch 15
Down power 9 counter 2 which is a counter to the set value
3 is preset, and the numerical value for one set is digitally displayed on the set repeat display section 17 by the decoder 24.

〔motion〕

As mentioned above, when one worker takes out the screws 2 one by one from the take-out position 4 using a magnetic screwdriver or the like, the screw take-out signal from the detection switch 11 is sequentially input to the down counter 23 through the waveform shaping circuit 25, and the down counter -23 are sequentially driven.

Then, the numerical value for one set preset in the down counter 26 is sequentially subtracted one by one, and the numerical value for one set digitally displayed on the set repeat display section 17 is incremented by one by the decoder 24. It is subtracted sequentially.

Then, by repeating the above actions, eventually.

The down counter 23 reaches the initially preset value for one set. (It means the end of the subtraction operation!) Then, in A-body, when the value digitally displayed on the set repeat display section 171 reaches "1J", the repeat timing circuit is activated by inputting the next screw removal signal. 2
Through 6Y, the down counter 23 is returned to the initially preset value for one set.

Then, the alarm 18 is driven by the repeat timing circuit 26, and a buzzer (or lamp) notifies the operator that the down counter 23 has reached the initially preset value for one set.

On the other hand, the down counter 23 is initially preset to 1.
Every time the set value is different, the up counter 27, which is a second counter, is sequentially driven via the repeat timing circuit 26.

Then, the value of the up counter 23 changes from "0" to "1".
'', and the up counter 23 sequentially adds the total set number from 0 to 1 and digitally displays it on the +sitototal display section 21.

In addition, if one worker removes the screw 2 from the removal position 4 using a magnetic screwdriver, etc., and then drops the screw 2 from the removed magnetic screwdriver, etc. in the middle and loses it, the worker no count switch 20
Through V'J'lFj and the latch circuit 28, the values on the down counter 23 and the set repeat display section 17 are corrected to the previous values (the values before the missing screw 2 was removed from the removal position 4). The number of screws 2 tightened in one assembly set matches the numerical value digitally displayed on the set repeat display section 17.

Further, the total number of sets digitally displayed on the set total display section 21 is protected by a backup power supply 29 for one day or a necessary period of time.

To clear the digital display on the set total display section 21, the clear switch 22 may be pressed.

Also, the number for one set preset in the down counter 23! To change, press reset switch 1
After pressing the button 61, the preset switch 15 is again used to preset.

Although the embodiment of the present invention has been described above, the present invention is not limited to the embodiment (1) Various effective changes can be made based on the technical idea of the present invention.

Furthermore, the present invention is applicable to the supply of various types of screw-like materials (rivets, etc.).

[Effects of the Invention] Since the present invention is configured as described above, the following effect 11h: * is achieved.

When a worker uses a magnetic screwdriver or the like to take out screws one by one from the extraction position and tighten them one after another into an assembly set, the operator can immediately check the numerical value of one set of the screws just taken out from the display means. Since the information can be read in a timely manner, it becomes clear that one worker is aware of the screw tightening work. Therefore, it is possible to prevent the operator from forgetting to tighten the screws due to a mistake. Moreover, the number of times screws are taken out is 1.
If the values for a set are different, the worker is notified by a buzzer, lamp, etc., so one worker does not have to check his or her own process after tightening screws for each assembly set. You can create a clay of efficiency.

In addition, if the value on the counter and display means can be corrected by the operator with a single touch using a correction switch, for example, if the operator removes screws from the extraction position using a magnetic screwdriver, etc., Not only is it convenient to be able to immediately correct the numerical values in the event that a screw is lost because it has been dropped from a magnetic screwdriver, etc., but it also allows workers to be more aware of it.

Yet again. The second display means allows you to display the total number of sets. If you rub 5J, you will be able to manage the engineer group!
Workers and managers can instantly read and understand the number of passing sets.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention. Fig. 1 is a perspective view showing the entire screw supply cover Y, Fig. 2 is a plan view showing the stopper at the take-out position, Fig. 3 is a side view showing the detection switch at the take-out position, and Fig. 4 is the control circuit. FIG. Note that the reference numerals used in each drawing are as follows. 1... Screw supply device 2, fist, @e... Screw 3... Supply means 4... Extraction position 11. ...Detection switch 15.1 ...Preset switch 17 ...
...Set repeat display section (display means) 18...Alarm (notification means) 20...
... No count switch (correction switch) 21 ..... Set total display section (second display means) 23 ..... Down counter (counter 27.
...Up counter C second counter). (Voluntary) Procedure Nefu Seisho 1. Display of the case 1986 Patent Application No. 51349 2 Name of the invention Screws supply device 3 Relationship to the case Patent applicant Tokyo Parts Co., Ltd. Kitashinyo 6-7-35 (218) Sony Corporation 4, Agent Showa Month, Day 6, Number of inventions increased by amendment 7゜Subject of amendment (1), "Thus," on page 11, line 19 of the specification was changed to "Thus, 0 selection. From circuit 30". (2), page 12, line 3 and lines 10-11, “
Correct "Repeat Timing Circuit 26" to "0 Selection Circuit 30". (3) "23" on page 12, line 14 will be corrected to "27". (4) Correct Figure 4 as shown in the attached sheet. −1 or more

Claims (1)

[Scope of Claims] 1. In a screw supply device that is equipped with a supply means that automatically sequentially supplies screws to the take-out position in synchronization with the screws being taken out one by one from the take-out position. , a detection switch that detects that screws are taken out one by one from the above-mentioned take-out position, and a value that can be preset for one set of screws to be taken out from the above-mentioned take-out position, and is supplied from the above-mentioned detection switch. a counter driven by a signal; a display means driven by the counter to display the number of times screws are taken out from the take-out position; A supply device for screws, characterized in that it is equipped with a notification means for notifying. 2. The screw supply device according to claim 1, further comprising a correction switch capable of returning the numerical values of the counter and display means to the previous numerical values. 3. A second counter that is driven every time the counter reaches the preset value for one set, and a second counter that is driven by the second counter to display the total number of sets. 3. The screw supply device according to claim 1, further comprising a display means.