JPH0141571Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to an automatic supply device for screws, etc., which is capable of taking out a desired number of screws during screw fastening work, etc. The present invention relates to a supply device that allows you to easily check if you have forgotten or lost a screw.

(Prior Art) Conventionally, when screwing work on an equipment assembly line or the like, an appropriate number of screws were taken out from a case by hand and carried out.

For this reason, when the required number of screws is insufficient, the screws must be taken out of the case again, and when there are excess screws, they must be returned to the case, which is very cumbersome. Moreover, since the appropriate number of screws are held and tightened, the number of screws and the number of places to be tightened do not correspond, resulting in forgetting to tighten the screws or noticing if the screws are dropped into the device. Sometimes there wasn't.

There have been supply machines that automatically supply screws and nuts, but simply by automatically supplying screws, it is not possible to check whether a screw has been forgotten or lost.

(Purpose of the invention) The purpose of the invention is to eliminate the drawbacks of the conventional means described above, and to make it possible to easily take out a desired number of screws that are set in advance to correspond to the number of places to be screwed. To provide an automatic supply device for screws, etc., which can prevent forgetting of screws and also enable confirmation of lost screws.

(Structure of the invention) The automatic supply device for screws, etc. according to the present invention includes a supply machine configured to supply a number of screws via a hose according to the number of pulse signals input from a control circuit, In an automatic supply device for screws, etc., which is equipped with a screw receiver for storing screws supplied from a supply machine, the control circuit is controlled by a control signal from a comparison circuit to generate and stop a predetermined pulse signal. a pulse generator, a numerical value setting unit that allows the number of pulse signals generated in the pulse generator to be set in advance, and a relay for inputting the pulse signal from the pulse generator to the supply device;
A counter for counting the pulse signal, a display for displaying the number of pulses of the pulse signal input to the counter, and a reset signal generating means for controlling the counter and resetting it to a zero value, The comparison circuit compares the numerical value set in the numerical value setting section and the numerical value counted by the counter, and if they match, a control signal is input to the pulse generator, and the screw receiving section , a case having a narrowed lower opening in the shape of a funnel, and a stopper ball part disposed inside the case so as to be able to be pushed up freely and which prevents the screw from falling with the funnel-shaped part. It comprises a shaft which, when operated, allows all the screws stored above to fall and be supplied, and a switch which is actuated by the up and down movement of the shaft to control on/off the reset signal generating means. ing.

(Example) An automatic supply device for screws, etc. according to the present invention will be explained based on FIGS. 1 to 4, which show examples.

Figure 1 shows the entire automatic supply device, in which the number of screws 2 corresponding to the number of input pulse signals a is inserted into the hose 3.
Feeding machine 1 that is capable of feeding via
, a screw receiving part 4 which stores the screws 2 supplied from the feeder 1 and can discharge all the stored screws 2 to the outside by performing a predetermined operation; and a control circuit 5. It is made up of As shown in FIG. 3, the control circuit 5 includes a pulse generator 6, a numerical value setting section 7, a counter 8, a comparison circuit 9, etc., which will be described later.

To explain in detail the configuration of the feeder 1 and the screw receiving part 4, the feeder 1 can be a well-known one. Since there is a screw supply device which is designed to supply screws to the tip of a screwdriver, it is possible to make use of this device by removing the driver portion and installing the screw receiving portion 4 there.

As shown in FIG. 2, the screw receiving portion 4 has a screw supply port 3a formed on one side of the upper part of a case 10 formed in a substantially cylindrical shape, and the hose 3 is connected to the screw supply port 3a. A stopper member 11 is disposed at the edge of the lower opening of the case 10 so that the lower opening forms a funnel shape, and a shaft 12 is disposed at the center of the case 10 so as to be movable up and down (to freely push up). ing. A stopper ball 13 is integrally formed in the lower part of the shaft 12 and is adapted to engage with the inclined surface 11a of the stopper member 11 to close the screw outlet 11b.
The screw 2 supplied from a is the stopper ball 13
The screws are prevented from falling by the stopper member 11 and stored inside the case 10, and when the lower end shaft 12a of the shaft 12 is pushed up, all the screws fall and are supplied from the screw outlet 11b.

There is a micro switch on the top surface of the screw receiving part 4.
A SW is arranged and is activated when the shaft 12 is pushed up.

As shown in FIG. 3, the pulse generator 6 in the control circuit 5 is controlled on and off by a control signal b from a comparison circuit 9, which will be described later, so that a predetermined pulse signal a is generated and stopped. This pulse signal a is input to the feeder 1 via the relay 14 and counted by the counter 8.

The numerical value setting section 7 is for making it possible to set in advance so as to generate a desired number of the pulse signals a, and the comparison circuit 9 compares the value set by the numerical value setting section 7 with the counter 8. The counted value is compared, and if they match, a control signal b is input to the pulse generator 6. Note that the counter 8 is controlled by a reset signal c outputted from an inverter 15, which is a reset signal generating means, and is reset to a zero numerical value.

The inverter 15 is the micro switch
It is turned on and off by SW operation. That is, when the micro switch SW is off, its output is "L" due to the power (+V) applied through the resistor R, and when the micro switch SW is on, its output becomes "H". to control the counter 8.

In the figure, reference numeral 16 denotes a display device for displaying the number of pulses of the pulse signal a input to the counter 8;
Reference numeral 7 denotes a mounting hook provided on the side surface of the screw receiving portion 4 for attaching the screw receiving portion 4 to a conveyor or the like.

In the automatic supply device for screws, etc. configured as described above, the screw setting operator operates the numerical value setting section 7.
If you set the value in advance to the number corresponding to the location to be screwed, the number of screws corresponding to the number of pulses will be supplied from the feeder 1 to the screw receiver 4, and the screws can be tightened with the palm of your hand. When the case 12 is pushed up, all the screws fall and are supplied because the lower opening of the case 10 is funnel-shaped. When the shaft 12 is pushed up by this operation, the micro switch SW is turned on, the counter 8 is reset, and the next required number of screws is supplied into the case 10.

(Effect of the invention) According to the automatic supply device for screws, etc. according to the invention,
The screw setting operator can set the numerical value setting section according to the number of screws required, and the desired number of screws will be supplied to the screw receiving section, so the specified number of screws can be set by simply pushing up the shaft of the screw receiving section. This operation automatically resets the screws so that the next required number of screws are supplied, and in the screw receiver, the screw outlet is closed by the weight of the stopper ball, so it closes. Screws can be removed with one hand without the need for additional operations.

Therefore, the cumbersome work that was conventionally done, such as taking out screws and putting excess screws back into the case, is no longer necessary, and the screw fastening work can be done more efficiently, leading to labor savings on the production line. be effective.

Also, if there are excess screws, it will be obvious that you forgot to tighten the screws, and if there are not enough screws, it will be obvious that you have dropped the screws into the device, etc., so confirmation is easy.

[Brief explanation of drawings]

1 to 4 show an embodiment of the automatic supply device for screws, etc. according to the present invention, FIG. 1 is a schematic diagram showing the whole, FIG. 2 is a front view of the screw receiving part, and FIG. 3 is a control The block diagram of the circuit, FIG. 4, is a time chart of FIG. 1: Feeder, 2: Screw, 4: Screw receiver, 5: Control circuit, 6: Pulse generator, 7: Numeric value setting section,
8: Counter, 9: Comparison circuit, a: Pulse signal,
10: Case, 12: Shaft, 13: Stopper ball, 14: Relay, 15: Inverter,
SW: Micro switch.

Claims (1)

[Scope of Claim for Utility Model Registration] A supply machine configured to supply a number of screws through a hose according to the number of pulse signals input from a control circuit, and a stock supply machine for supplying screws supplied from the supply machine. In the automatic supply device for screws and the like, the control circuit includes a pulse generator that generates and stops a predetermined pulse signal under the control of a control signal from a comparator circuit; a numerical setting unit that allows the number of pulse signals to be generated to be set in advance; a relay for inputting the pulse signal from the pulse generator to the supply device; a counter for counting the pulse signal; It is equipped with a display that displays the number of pulses of the input pulse signal, and a reset signal generating means for controlling the counter and resetting it to a 0 value, and the number set in the numerical value setting section and the counter The comparator circuit compares the number counted with the above comparator circuit, and if they match, a control signal is input to the pulse generator. and,
A stopper ball part is provided inside the case so as to be able to be pushed up freely and prevents the screws from falling together with the funnel-shaped part. The shaft is designed to
An automatic supply device for screws, etc., characterized in that it is equipped with a switch that is activated by the vertical movement of the shaft to control on/off the reset signal generating means.