JP6849984B2 - Screw ejection mechanism of screw feeder - Google Patents

Description

The present invention relates to a screw ejection mechanism in which screws are cut out one by one from a screw feeder in the horizontal direction and then ejected and supplied.

Conventionally, in a screw feeder that automatically and continuously supplies screws and parts similar to screws, screws are supplied as shown in Patent Documents 1 to 3 in order to take out the screws and attach them to necessary parts. A guide member for guiding the tip of the bit was provided in the take-out part, and the bit was taken out directly.
In this mechanism, the screws are sequentially fed by the stopper, but the supply speed of the screws is slow, and it is necessary to arrange the screws in the vicinity of the user.
Further, the present inventors have proposed in Patent Document 4 in which screws are cut out one by one in the vertical direction from a screw feeder, and the present inventors have improved this and put a predetermined number of screws in a screw container or a palm. We have also proposed to supply screws, but while we can supply screws accurately and reliably, there is the drawback that the supply speed is slightly slower because the escaper plate is vertical and the screws are taken out by their own weight.

Japanese Unexamined Patent Publication No. 8-155758 JP-A-2010-208852 Japanese Unexamined Patent Publication No. 2016-13596 Japanese Unexamined Patent Publication No. 2012-56070

By the way, the conventional screw supply mechanism for cutting out disclosed in Patent Documents 1 to 3 can accurately and reliably supply screws, but as described above, there is a problem that the supply speed is slightly slow.
An object of the present invention has been made in view of the above-mentioned conventional problems, and in a conventional screw feeder for a driver bit, a number of screws set in a storage container provided in a screw feeder can be screwed at high speed. It is intended to provide a screw ejection mechanism that accurately and reliably supplies the number of screws set in the storage container and supplies the screws directly under the screw supply box or into the palm of the hand.

In order to solve the above-mentioned problems, the present invention presents a screw feeding method in which screws are cut out one by one from a screw feeder in the horizontal direction.
In the screw cutting mechanism for cutting out a screw, the screw S is separated by the screw receiving part 311 of the disk-shaped escaper part 31 that rotates in the horizontal direction, and the head S1 of the separated screw is arranged on the upper part of the escaper part 31. The screw ejection mechanism 32 is ejected by the ejection mechanism 32 (FIGS. 4 and 13), and the screw ejection mechanism 32 is provided with a claw portion that is attached to a rotary solenoid and has a V-shaped opening at the front, and the claw portion provides a screw head S1. This is a screw ejection mechanism of a screw feeder, characterized in that a predetermined number of screws are inserted into a screw storage portion by tapping the side portion of the screw forward to eject the screw in the horizontal direction.
Further, the position of the claw portion is adjusted by a plurality of adjusting mechanisms for attaching the screw ejection mechanism to the frame body.

According to the invention of the screw ejection mechanism of the screw feeder of the present invention, the screw is ejected even in the screw supply in which the screw is cut out one by one from the screw feeder like the conventional screw feeder for a driver bit. With the mechanism, a predetermined number of screws can be put into the screw storage portion at high speed and supplied.
Also, the screw play out mechanism, since the forward striking the sides of the head of the screw is provided with a claw portion which is released in a V-shape, so out play the screws in a certain direction, precisely to play the screw forward can be, the claw portion is a predetermined angle rotated by Russia over tally solenoid, reliably and accurately can be supplied to the screw S.

A perspective view of the appearance of the screw feeder 1 according to the embodiment of the present invention with the front cover closed, and a perspective view of the storage container arranged under the storage portion. An explanatory diagram illustrating the details of the counter in FIG. FIG. 3 (a) is an external perspective view when the front cover is opened and when it is used as a screw feeder for a bit, and FIG. 3 (b) is a screw S with a palm under the storage portion in FIG. Perspective view of the receiving state, A perspective view of a state in which a screw is cut out from the alignment rail in Fig. 1 (a state in which the screw ejection mechanism (unit) is removed). Top view of the escaper section of FIG. 4, A perspective view of the state in which the screw is moving from the state shown in FIG. 4 to the screw ejection mechanism. A perspective view of the state in which the screw has been transferred to the screw ejection mechanism from FIG. 8 (a) is a perspective view of the stopper in the state of FIG. 7, FIG. 8 (b) is a plan view of FIG. 7, and FIG. 8 (c) is a front view thereof. Enlarged explanatory view of the range Z in FIG. 8 (c), From the state of FIG. 7, a perspective view of a state in which the screw is ejected into the screw storage portion, 11 (a) is a perspective view of the stopper in the state shown in FIG. 10, and FIG. 11 (b) is a plan view of the escaper portion of FIG. FIG. 12 (a) is a rear view of the screw ejection mechanism, and FIG. 12 (b) is a perspective view from diagonally below. Explanatory drawing explaining the operation of the screw ejection mechanism in the order of (a) to (d), FIG. 14 (a) is a perspective view of a state in which the screw has finished ejecting from the state of FIG. 10, and FIG. 14 (b) is a plan view thereof.

The present invention is a screw ejection mechanism that enables a screw feeder to reliably cut out and separate screws one by one from a screw feeder such as a screw or eyelet, and to insert the cut out screw into a screw storage portion at high speed. .. The term "screw" as used in the present invention means a screw and screws such as eyelets similar to the screw.

Hereinafter, examples of the screw ejection mechanism of the screw feeder according to the present invention will be described in detail with reference to the drawings.
1 and 3 are overall views of the screw feeder 1 of the present embodiment, FIG. 1 is a view of a state of use with the front cover 16 closed, and FIG. 3 is a view of an escaper unit with the front cover 16 opened. It is a figure which shows the whole of 31 and a screw ejection mechanism (unit) 32.
In FIG. 1, the counter 11 sets the number of screws S to be inserted into the screw accommodating portion 12 by the screw feeder 1 and displays the number of screws S supplied. Further, a screw accommodating portion 12 is installed on the front surface of the screw feeder 1, and the opening 121 at the lower portion of the screw accommodating portion 12 is opened, or the opening operation lever 1211 is lowered to open and is arranged directly under the opening. Move the counted screws into the screw storage container 191 and the palm 193. A pair of light emitting and light receiving optical sensors 122 are arranged on both sides of the opening 121 or the opening lever 1211, and there is no screw in the screw accommodating portion 12, and the opening 121 is opened or the opening operating lever 1211 is lowered. If so, the screw S is not supplied and the standby state is maintained. A power switch 13 and a screw supply start switch 14 are arranged on the rear surface of the screw feeder 1, an input port cover 151 of the input port 15 of the screw S to be supplied is arranged in front of the power switch 13, and a front cover is arranged in front of the power switch 13. 16 are arranged.

Here, FIG. 1-2 shows the details of the counter 11, but the set display unit 111 of the display unit displays the number of screws S set in the screw storage unit 12, and the screws are screwed from the screw storage unit 12. When S is discharged, the countdown is performed, and when the screws S are accumulated in the screw storage portion 12, the number of sets is returned, and the LED 116 blinks while the number of sets is being changed. When the number of sets is accumulated in the screw accommodating portion 12, the feeder 1 is stopped, and when the screw S is taken out from the opening 121, the feeder is restarted.
The set total display unit 112 of the display unit displays the total number of sets, and counts up each time the number of screws in the set number is accumulated in the screw storage unit 12, and when the number of sets is accumulated in the screw storage unit 12, the feeder 1 Stops, and when the screw is ejected, the screw accommodating portion 12 restarts.
In this way, the LED 116 lights up when a set number of screws S are accumulated, and at the same time, a buzzer (not shown) sounds. Further, if the opening operation lever 1211 is operated while the number of sets is being taken out, it blinks. The number of sets setting buttons 113 to 114 may be known as buttons for setting the number of sets, the total number of sets, and the like, and the volume setting button 115 changes the volume of the buzzer.

FIG. 3 (b) is a diagram of the screw feeder 1 excluding the screw accommodating portion 12 of FIG. 3 (a). However, when the whole is described with reference to FIG. 3 (b), the rear portion of FIG. 3 (b) is shown. There is a screw supply unit 2, and the screw supply unit 2 adopts the known configuration of Patent Document 2 described above. The screw supply unit 2 has a configuration in which a large number of screws can be stored by deepening the storage unit, and the screws are pumped up by using a magnet and aligned with the vibrating alignment rail 21 (see FIG. 4) of the screw transfer mechanism.
Therefore, when the power switch 13 is turned on, as disclosed in Patent Document 2 described above, the screw S is scooped up for a certain period of time to stop. When the optical sensor (container take-out sensor) 122 blocks the lever of the opening 121 of the screw storage portion 12 for 200 ms or more, the screw feeder 1 operates and supplies the screw S from the supply port 34 to the screw storage portion 12 in front. .. When the number of screws S set on the counter 11 is ejected, the LED 17 lights up, the buzzer (not shown) sounds, the screw supply stops after a certain period of time, and the screws are screwed from the screw storage unit 12 to the screw storage container 191. Move S to finish.

When the next screw storage container 191 is arranged directly under the screw storage unit 12 and the optical sensor (container removal sensor) 122 is blocked, the LED 17 turns off and the feeder restarts. If the optical sensor (container removal sensor) 122 is not blocked before the set number of screws S is supplied, the LED 17 blinks and the buzzer continues to sound, and after a certain period of time, the number of ejected screws is reset and the number of sets is recounted. It is done like this.
It is extremely important to insert the predetermined number of screws S into the screw storage unit 12, the screw storage container 191 and the palm 193, and the number of screws used in the predetermined process is accurately determined, and even one screw is used. If there is a surplus, there will be a part where the screw is not installed, and it is necessary to re-inspect the part.

Next, the screws aligned with the vibrating alignment rail 21 adopt the known configuration of the screw cutting mechanism 3 of Patent Document 3 described above, which will be described with reference to FIG.
FIG. 4 is an overall perspective view in which the screw cutting portion 3 is incorporated. In FIG. 1, the screw feeder 1 is operated by turning on the start switch 14, and the screw S is operated from the input port 15 at the upper portion of the screw feeder 1. Is put in, the screws of FIG. 4 are aligned with the alignment rail 21, and the screws S at the tip thereof are sequentially supplied from the discharge port 22.
Further, since it is a screw supply device that cuts out using an escaper unit 31 that rotates the screws S one by one in the horizontal direction, if the operation of the screw ejection mechanism (unit) 32 (see FIG. 6) is stopped, the above-mentioned patent document It can also be used as a screw supply device corresponding to the driver bit B as shown in Japanese Patent Application Laid-Open No. 2016-13596, and can also be a screw supply combined device corresponding to the driver bit B.
In this case, if the operation switching button 18 is operated to open the front cover 16, the supply speed of the screw S becomes slightly slower, the screw ejection mechanism (unit) 32 (see FIG. 6) stops operating, and the driver bit. It is a screw supply unit of the type that picks up the screws S one by one in B.

In the screw cutting mechanism 3 of FIG. 4, since the screw receiving portions 311 of the recesses are provided at equal intervals of 90 degrees on the disk-shaped escaper portion 31 that rotates in the horizontal direction, the screws S are surely separated one by one. With a structure that can be used, the screws do not bite or overlap with each other, and the screw posture is stable. Therefore, the screw S is ejected by the screw ejection portion 32, and the predetermined setting is set in the screw storage portion 12. It is possible to insert a number of screws S, and it is also extremely effective for a type in which the screws S are taken out with a conventional driver bit.
Here, as shown in FIG. 5, which is a plan view of FIG. 4, the screw receiving portion 311a is a screw of the screw feeder 1 at the discharge port 22 of the tip screw S of the alignment rail 21 in which the screws S are aligned. If there is no screw S in the screw receiving portion 311a connected to the position of the discharge port 22 for discharging S, the screw S at the tip of the alignment rail 21 enters the screw receiving portion 311a.
After that, as shown in FIG. 6, the escaper unit 31 is rotated clockwise by 90 degrees in the horizontal direction by a stepping motor (not shown), and the screw S is also moved by 90 degrees in the horizontal direction, as shown in FIG. The screw ejection mechanism (unit) 32 moves to the position where it is ejected and stops.

In this way, the screw S of the screw receiving portion 311b on the opposite side is ejected by the screw ejecting mechanism (unit) 32, the screw S of the screw receiving portion 311 is taken out, and the screw S is released by the detection signal of the screw detecting mechanism 4. Although it is detected that there is no screw, in this embodiment, a screw detection mechanism 4 in which a pair of light emitting elements 41 and a light receiving element 42 are arranged to emit a light beam passing through a position where the screw ejection mechanism (unit) 32 is ejected is provided. The presence or absence of the screw S in the screw receiving portion 311b at the position where the screw is ejected is detected, and the escaper portion 31 is rotated. In this case, the screw S is rotated about every 0.3 seconds to move the screw S in the screw receiving portion 311 of the escaper portion 31.
In order to stop the screw receiving portion 311b at an accurate ejection position, as disclosed in Patent Document 3 above, a slit (not shown) of a predetermined position stopping mechanism (not shown) is detected to detect an escaper portion 31. May be rotated and stopped so as to match a predetermined position of each screw receiving portion 311 in the recess.

After that, a stepping motor (not shown) is driven, the screw S is received from the discharge port 22 of the screw feeder 1 by the screw receiving portion 311 of the screw S, and is stored in the screw receiving portion 311 of the recess of the escaper portion 31. The stepping motor is driven until the screw S of the screw receiving portion 311 is at the supply position of the screw S of the screw cutting mechanism 3, the escaper portion 31 is rotated every 90 degrees, and the screw receiving portion 311 accommodating the screw S is stored. Continue to stop at the position corresponding to, rotate the escaper portion 31 of the rotating disk by 90 degrees, and continue until the counter 11 finishes the set number and becomes 0. In this case, when the screw S reaches the screw ejection position S1, since there is no escaper guide portion 312, the screw S itself is a stopper to prevent the screw S from protruding forward from the screw receiving portion 311 due to its own weight or the like. 33 is provided.

Here, the operation of the stopper 33 will be described with reference to FIGS. 7, 8 (a), (b), (c), and 9.
In FIG. 7, the screw receiving portion 311b of the escaper portion 31 is moved to a position where the screw S is ejected forward by the screw ejection mechanism (unit) 32, but the front surface of the screw receiving portion 311b is released. The stopper 33 prevents it from moving forward. As shown in FIGS. 8A and 8B, the stopper 33 is urged by the coil spring 331 with a weak force in the counterclockwise direction, so that the screw S falls off to the front. There is no.
Here, as shown in FIG. 8 (c) on the front surface of the supply port 34 and FIG. 9 in an enlarged view of the explanation of the A portion thereof, the head S1 of the screw S, the escaper portion 31, the stopper 33, and the upper and lower parts of the escaper guide portion 312 are shown. Explaining the relationship, the upper surface of the escaper portion 31 is slightly higher than the escaper guide portion 312 around the guide of the escaper portion 31 (left and right), and the upper surface of the screw receiving portion 311 is also slightly higher. S is lifting the head S1. Therefore, as shown in FIG. 9, a gap is generated between the head S1 and the escaper guide portion 312, and the screw holding portion 332 at the tip of the stopper 33 is prevented from entering the gap and the screw S from falling off. To do.
Since the pressing force of the coil spring 331 is weak enough to lightly press the screw S from falling off, it is weaker than the force of the tip ejection portion 321 of the screw ejection mechanism (unit) 32 in the next ejection step.

The screw ejection mechanism (unit) 32 will be described with reference to FIGS. 10 to 13.
As is clear from FIG. 10 , a screw ejection mechanism 32 is arranged above the escaper portion 31, and the tip ejection portion 321 of the screw ejection mechanism (unit) 32 causes the head S1 of the screw S to move forward. It is the figure of the extruded state, FIG. 11A is the state of the stopper part 33 in that case, and FIG. 11B is a plan view. As shown in FIGS. 12A and 12B, the tip ejection portion 321 of the screw ejection mechanism (unit) 32 is attached to the tip of the rotation arm 323 attached to the rotation shaft 3221 of the rotary solenoid 322. ..
When the rotation of the escaper unit 31 is stopped, the rotary solenoid 322 is turned on and rotates at a constant angle. In this embodiment, the rotary solenoid 322 is used to rotate about 30 degrees, and the power is turned off. Then, it returns to the original position by the spring incorporated in the rotary solenoid 322.
The shape of the tip ejection portion 321 may be a flat shape, but in this embodiment, as shown in FIG. 12, the shape is such that the tip is released in a V shape forward, and the screw S is used as the claw portion 3211 that hits the side portion of the head of the screw. I try to play the head S1 of the head forward accurately. The tip ejection portion 321 to the rotating arm 323 is provided with a plurality of angle adjusting portions 324 composed of the claw portion 3211 and the screw portion 3212, and the claw portion 3211 is provided according to the size and shape of the screw S to be supplied. The front-rear position, height, and angle of the above can be adjusted by the screws 3241 and the elongated holes 3242 of the plurality of angle adjusting portions 324.

The flipped screw S detaches from the screw receiving portion 311b against the pressing force of the coil spring portion 331 of the stopper 33, and the screw accommodating portion 12 in front of the screw feeder 1 (see FIG. 1).
Is thrown into.
This operation will be described with reference to FIGS. 13 (a) to 13 (d). In FIG. 13 (a), the screw receiving portion 311b of the solenoid portion 31 is rotationally moved and stationary at the ejection position, and the screw is screwed. When detected by the detection mechanism 4, in FIG. 13 (b), the power of the rotary solenoid 322 is turned on, the rotating arm 323 and the tip ejecting portion 321 start rotating, and in FIG. 13 (c), the tip ejecting portion 321 catches the head S1 of the screw S and ejects it to the screw accommodating portion 12 in front of the supply port 34 as shown in FIG. 13 (d). In this way, after the screw S is ejected, the power of the rotary solenoid 322 is turned off, and the rotary solenoid 322 is returned to its original position in the order of FIG. 13 (c) → FIG. 13 (b) → FIG. 13 (a), and then fed. Prepare for the coming out of the screw S.

This state is the state shown in FIGS. 14A and 14B, but since the screw S disappears from the screw pressing portion 332 of the stopper portion 33, the screw pressing portion 332 also returns to the original position by the coil spring portion 331.
In this way, when the number of screws S set by the counter 11 (see FIG. 1) is inserted into the screw storage portion 12 from the supply port 34, the supply of the screws S is once terminated. Then, the screw S of the screw storage portion 12 is moved into the palm 193 or the movable screw storage container 191. Then, when the inside of the palm 193 is extended to receive the next set screw S or the screw storage container 191 is set and the start switch 14 is turned on, the above-described operation is repeated according to the setting of the counter 11.

The procedure for transferring the set screw S into the screw storage container 191 or the palm 193 will be described with reference to FIG. 1 or FIG.
In FIG. 1, when the screw storage container 191 is set, the screw storage container 191 is arranged under the screw storage portion 12 attached to the screw feeder 1, and the opening operation is performed by the container tip portion 192 in the traveling direction of the screw storage container 191. By pushing the lever 1211, the opening 121 is opened, and all the screws S in the screw storage portion 12 are discharged to the screw storage container 191.
In FIG. 3, when the predetermined screw S is moved into the palm 193, the palm 193 is held under the screw storage portion 12, and the opening operation lever 1211 is pushed by the fingertip 194 of the hand (arrow in FIG. 3B). ) Allows the opening 121 to be opened and all the screws S in the screw accommodating portion 12 to be dropped into the palm 193.

As described above, according to the embodiment of the screw ejection mechanism 32 of the screw feeder 1 of the present invention, one screw is provided from the screw feeder 1 one by one, as in the conventional screw feeder for the driver bit B. In the screw supply 1 for cutting out in the horizontal direction, the screw S can be used as a screw supply device for a bit by stopping the operation of the screw ejection mechanism 32, and the screw S can be stored by the screw ejection mechanism 32. A predetermined number of screws can be inserted into the portion 12 at high speed and supplied. Actually, the cutting speed of the screw S in Patent Document 3 described above was about 1.5 seconds / piece, but in this embodiment, it can be cut out and supplied in about 0.6 seconds, which is about three times as fast. ..
Also, mechanism 32 out playing screws, since the claw portion 3211 forward have been released in a V-type tapping the sides of the head S1 of the screw S is provided out play the screw S in a predetermined direction, reliable and accurate screw S Can be supplied.
Needless to say, the present invention is not limited to the above-described embodiment as long as it does not impair the characteristics of the present invention.

S ... Screw (class), S1 ... Head (screw), B ... Bit,
1 ... Screw feeder, 11 ... Counter, 111 ... Set display,
112 ... Set total display, 113,114 ... Set number setting button,
115 ... Buzzer volume setting button, 116 ... LED
12 ... Screw storage, 121 ... Opening, 1211 ... Opening operation lever,
122 ... Optical sensor (container removal sensor), 13 ... Power switch,
14 ... Start switch, 15 ... Input port, 151 ... Input port cover,
16 ... front cover, 17 ... LED, 18 ... operation switching button,
191 ... Screw storage container, 192 ... Container tip, 193 ... Palm,
194 ... fingertips,
2 ... Screw supply part, 21 ... Alignment rail, 22 ... Discharge port,
3 ... Screw cutting mechanism, 31 ... Escaper part, 311 (a, b) ... Screw receiving part,
312 ... Escaper Guide,
32 ... Screw ejection mechanism (unit), 321 ... Tip ejection part,
3211 ... Claws,
322 ... Rotary solenoid, 3221 ... Rotating shaft,
323 ... Rotating arm, 324 ... Angle adjustment part, 3241 ... Screw,
3242 ... long hole,
33 ... Stopper part, 331 ... Coil spring part, 332 ... Screw holding part,
34 ... Supply port,
4 ... Screw detection mechanism, 41 ... Light emitting element, 42 ... Light receiving element,

Claims (2)

In screw supply, which cuts screws one by one horizontally from the screw feeder,
The screw cutting mechanism for cutting out the screw S is a screw ejection mechanism in which the screw S is separated by the screw receiving portion of the disk-shaped escaper portion that rotates in the horizontal direction, and the separated screw head S1 is arranged above the escaper portion. The screw ejection mechanism is attached to a rotary solenoid and has a V-shaped open claw portion at the front, and the claw portion taps the side portion of the head S1 of the screw forward to eject the screw in the horizontal direction. , A screw ejection mechanism for a screw feeder, which is characterized by inserting a predetermined number of screws into the screw storage section. The screw ejection mechanism of a screw feeder according to claim 1, wherein the position of the claw portion is adjusted by a plurality of adjusting mechanisms for attaching the screw ejection mechanism to the frame body.

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