JP2018016490A - Screw-spring-out mechanism in screw feeder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a screw-spring-out mechanism capable of operating accurately and smoothly to discharge a predetermined number of screws.SOLUTION: A screw-spring-out mechanism which, when one screw is horizontally discharged at a time from a screw feeder, springs out the screw discharged from the screw discharge mechanism. The screw-spring-out mechanism in a screw feeder comprises: a claw part including a V shaped tip open forward to hit a top side part of the screw so as to spring out the screw to a predetermined direction; and multiple adjustment mechanisms, which attach a spring-out part to a frame body, and allows adjustment of a position of the claw part so as to feed a predetermined number of screws into a screw storage part.SELECTED DRAWING: Figure 10

Description

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

Conventionally, in a screw feeder that automatically and continuously supplies screws and parts similar to screws, in order to take out the screws and attach them to the necessary parts, as shown in Patent Document 1 to Patent Document 3, screws are supplied. A guide member for guiding the tip of the bit is provided in the take-out portion to be taken out directly by the bit.
In this mechanism, the screws are sequentially drawn out by the stopper, but the supply speed of the screws is slow, and it is necessary to arrange them near the user.
Furthermore, the present inventors have proposed in Patent Document 4 which is configured to cut out screws one by one from a screw feeder in a vertical direction, and this is improved so that a predetermined number of screws can be set in a screw container or a palm. Although the screw supply to supply is also proposed, although the screw can be supplied accurately and reliably, the escaper plate is vertical, and the screw is taken out by its own weight fall, so the supply speed is slightly slow.

JP-A-8-155758 JP 2010-208852 A Japanese Patent Laid-Open No. 2016-13596 JP 2012-56070 A

By the way, although the conventional screw supply mechanism disclosed in Patent Documents 1 to 3 can supply screws accurately and reliably, as described above, there is a problem that the supply speed is slightly slow.
The object of the present invention has been made in view of the above-mentioned conventional problems, and in a conventional screw supply device for a driver bit, the number of screws set in a storage container provided in the screw supply device can be increased at a high speed. An object of the present invention is to provide a screw unwinding mechanism that accurately and surely supplies and supplies a set number of screws to the storage container into a screw supply box or a palm directly below the screw supply box.

In order to solve the above problems, the invention of claim 1 is directed to a screw supply in which a screw is horizontally cut out one by one from a screw feeder. A screw ejecting mechanism of a screw feeder characterized by ejecting and inserting a predetermined number of screws into a screw storage portion.
According to a second aspect of the present invention, there is provided the screw feeder mechanism of the screw feeder according to the first aspect, wherein the screw feeder mechanism is a claw portion having a front portion released from a V-shape that strikes a side portion of a screw head. And screwing out the screw in a certain direction.
According to a third aspect of the present invention, in the screw feeding mechanism of the screw feeder according to the second aspect, the position of the claw portion is adjusted by a plurality of adjusting mechanisms that attach the screw protruding portion to the frame. To do.

According to the invention of the screw ejecting mechanism in the screw feeder of the present invention, the screw is ejected even in the screw feeding in which the screws are cut out one by one from the screw feeder as in the conventional screw feeder for the driver bit. By the mechanism, a predetermined number of screws can be loaded and supplied to the screw storage portion at high speed.
In addition, according to the inventions of claims 2 and 3, the screw spring mechanism provides a claw part that is released in a V shape in front of the side of the head of the screw so that the screw is flipped in a certain direction. The reliable screw S can be supplied accurately.

The state external appearance perspective view which closed the front cover of screw supply machine 1 which is an example of the present invention, and the perspective view which has arranged the storage container under the storage part, Explanatory drawing explaining the details of the counter of FIG. FIG. 3 (a) is a perspective view of the state in which the front cover is opened and when used as a screw supply device for a bit, and FIG. 3 (b) is a view of FIG. A perspective view of the receiving state, FIG. 1 is a perspective view of a state in which screws are cut out from the alignment rail in FIG. 1 (a state in which a screw ejection mechanism (unit) is removed); FIG. 4 is a plan view of the escaper portion of FIG. The perspective view of the state in the middle of a screw moving from the state of Drawing 4 to a screw flip-out mechanism, FIG. 6 is a perspective view showing a state in which the screw has moved from FIG. 8 (a) is a perspective view of the stopper in the state shown in FIG. 7, FIG. 8 (b) is a plan view of FIG. 7, and FIG. 8 (c) is a front view thereof. FIG. 8C is an enlarged explanatory view of a range Z in FIG. FIG. 7 is a perspective view of a state in which the screw is ejected from the state of FIG. 11 (a) is a perspective view of the stopper in the state shown in FIG. 10, FIG. 11 (b) is a plan view of the escaper portion of FIG. FIG. 12 (a) is a rear view of the screw release mechanism, FIG. 12 (b) is a perspective view obliquely from below, Explanatory drawing explaining operation | movement in order of (a) to (d) of a screw flip-out mechanism, FIG. 14A is a perspective view showing a state in which the screw has finished projecting from the state shown in FIG. 10, and FIG. 14B is a plan view thereof.

  The present invention is a screw feeding mechanism in a screw feeder that reliably cuts and separates screws one by one from a screw feeder such as a screw or eyelet, and allows the cut-out screws to be put into a screw storage portion at high speed. . The “screw” referred to in the present invention means a screw and a screw such as an eyelet similar to the screw.

Below, the Example of the screw unwinding mechanism of the screw feeder which implemented this invention is described in detail based on figures.
1 and 3 are general views of the screw feeder 1 according to the present embodiment. FIG. 1 is a view of the operating state with the front cover 16 closed, and FIG. FIG. 3 is a diagram showing the entire 31 and a screw ejection mechanism (unit) 32;
In FIG. 1, the counter 11 sets the number of screws S that the screw feeder 1 puts into the screw storage portion 12 and displays the number of screws S supplied. In addition, a screw storage portion 12 is installed on the front surface of the screw feeder 1, and an opening 121 at the bottom of the screw storage portion 12 is opened, or an opening operation lever 1211 is opened downward and is disposed immediately below the opening. The counted screw is moved into the screw storage container 191 or the palm 193. A pair of light emitting and receiving light sensors 122 are arranged on both sides of the opening 121 or the opening lever 1211. There are no screws in the screw storage section 12, and the opening 121 is opened or the opening operation lever 1211 is lowered. If it is, 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, and an inlet cover 151 of an inlet 15 of a screw S to be supplied is arranged in front of the power switch 13 and a front cover in front. 16 is arranged.

Here, FIG. 1-2 shows 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. When S is discharged, the countdown is performed. When the screw S is stored in the screw storage unit 12, the number of sets is returned, and the LED 116 blinks while the number of sets is changed. When the set number is stored in the screw storage portion 12, the feeder 1 stops, and when the screw S is taken out from the opening 121, the feeder restarts.
The set total display unit 112 of the display unit displays the total number of sets. When the set number of screws is stored in the screw storage unit 12, the set total display unit 112 counts up. When the set number is stored in the screw storage unit 12, the feeder 1 Stops, and when the screw is discharged, the screw storage portion 12 is reactivated.
As described above, the LED 116 is turned on when the set number of screws S is accumulated, and a buzzer (not shown) sounds at the same time. Further, it blinks when the opening operation lever 1211 is operated while the number of sets is being taken out. The set number setting buttons 113 to 114 are buttons for performing setting of the number of sets, set total, and the like. The volume setting button 115 is for changing the volume of the buzzer.

FIG. 3B is a view of the screw feeder 1 excluding the screw storage portion 12 of FIG. 3A. When the whole is described with reference to FIG. 3B, the rear portion of FIG. There is a screw supply unit 2, and the screw supply unit 2 adopts a known configuration of Patent Document 2 described above. The screw supply unit 2 is configured to store a large amount of screws by deepening the storage unit, pumping up the screws using a magnet, and aligning with an alignment rail 21 (see FIG. 4) that vibrates the screw transport mechanism.
Therefore, when the power switch 13 is turned on, the screw S is lifted for a certain period of time and stopped as disclosed in the above-mentioned Patent Document 2. Once again, when the optical sensor (container removal sensor) 122 blocks the lever of the opening 121 of the screw storage unit 12 for 200 ms or longer, the screw feeder 1 operates and supplies the screw S from the supply port 34 to the front screw storage unit 12. . When the set number of screws S set on the counter 11 is released, the LED 17 is turned on, a buzzer (not shown) sounds, the screw supply is stopped after a certain time, and the screw storage unit 12 transfers the screw to the screw storage container 191. Move S to finish.

When the next screw storage container 191 is disposed immediately below the screw storage portion 12 and the light sensor (container removal sensor) 122 is blocked, the LED 17 is turned off and the feeder is restarted. If the light sensor (container removal sensor) 122 is not blocked before the set number of screws S is supplied, the LED 17 will continue to flash and the buzzer will sound. After a certain period of time, the number of discharges will be reset and the number of sets will be counted again. It is like that.
It is extremely important to put the predetermined number of screws S into the screw storage portion 12, the screw storage container 191, and the palm 193, and the number of screws used in a predetermined process is accurately determined. If there is a surplus, there will be a part where the screw is not mounted, and it is necessary to reinspect the part.

Next, the screw aligned with the vibrating alignment rail 21 employs a known configuration of the screw cutting mechanism 3 of Patent Document 3 described above, and this 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 with the start switch 14 turned ON, and the screw S is inserted from the inlet 15 at the top of the screw feeder 1. 4 is aligned with the alignment rail 21 and supplied sequentially from the outlet 22 of the screw S at the tip.
Further, since the screw supply device uses the escaper portion 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 3 can also be used as a screw supply device corresponding to the driver bit B as shown in JP-A-2006-13596, and can also be a screw supply combined device corresponding to the driver bit B.
In this case, if the operation switch button 18 is operated and the front cover 16 is opened, the supply speed of the screw S is slightly lowered, the operation of the screw ejection mechanism (unit) 32 (see FIG. 6) is stopped, and the driver bit In B, the screw supply section takes up the screws S one by one.

In the screw cutting mechanism 3 in FIG. 4, the disk-shaped escaper portion 31 that rotates in the horizontal direction is provided with the recessed screw receiving portions 311 every 90 degrees at equal intervals, so that the screws S are reliably separated one by one. In the structure, the screws do not bite or overlap with each other, and the screw posture is stable. Therefore, the screw S is screwed out by the screw protruding part 32, and the predetermined value set in the screw storage part 12 is set. A number of screws S can be inserted, and it is 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 311 a is connected to the discharge port 22 of the tip screw S of the alignment rail 21 in which the screw S is aligned. When the screw S is connected to the position of the discharge port 22 for discharging S and the connected screw receiving portion 311a has no screw S, the screw S at the tip of the alignment rail 21 enters the screw receiving portion 311a.
Thereafter, as shown in FIG. 6, the escaper portion 31 is rotated clockwise by 90 degrees in a horizontal direction by a stepping motor (not shown), and the screw S is also moved by 90 degrees, and as shown in FIG. The screw jumping mechanism (unit) 32 moves to a position where it is kicked off and stops.

As described above, 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 detected by the detection signal of the screw detecting mechanism 4. In this embodiment, the screw detection mechanism 4 in which a pair of light-emitting elements 41 and light-receiving elements 42 are arranged for a light beam that passes through a position where the screw-release mechanism (unit) 32 is ejected is provided. The presence or absence of the screw S at the screw receiving portion 311b located at the position where it is ejected is detected, and the escaper portion 31 is rotated. In this case, it rotates about every 0.3 seconds, and the screw S that has entered the screw receiving portion 311 of the escaper portion 31 is moved.
In order to stop the screw receiving portion 311b at a position where it is accurately ejected, as disclosed in the above-mentioned Patent Document 3, a slit (not shown) of a predetermined position stop mechanism (not shown) is detected and the escaper portion 31 is detected. May be rotated and stopped so as to coincide with a predetermined position of each screw receiving portion 311 of the recess.

  Thereafter, a stepping motor (not shown) is driven to receive the screw S from the discharge port 22 of the screw feeder 1 into the screw receiving portion 311 of the screw S, and store it 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 in the supply position of the screw S of the screw cutting mechanism 3, and the escaper portion 31 is rotated every 90 degrees, and the screw receiving portion 311 containing the screw S is stored. Is stopped at the position coincident with, and the escaper portion 31 of the rotating disk is rotated by 90 degrees, and is continued until the counter 11 finishes the set number and becomes zero. In this case, since the escaper guide portion 312 does not exist when the screw S reaches the screw jumping position S1, a stopper is provided to prevent the screw S itself 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, 8A, 8B, and 9C, and FIG.
In FIG. 7, the screw receiving portion 311b of the escaper portion 31 is moved to a position where the screw S is flipped forward by the screw discharging 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 biased with a weak force counterclockwise by the coil spring 331, so that the screw S falls off to the front surface. There is no.
Here, as shown in FIG. 8 (c) on the front surface of the supply port 34 and FIG. 9 of an enlarged view of the portion A, the upper and lower sides of the head S1, the escaper portion 31, the stopper 33, and the escaper guide portion 312 of the screw S are shown. Explaining the relationship, the upper surface of the escaper portion 31 is slightly higher than the surrounding (left and right) escaper guide portions 312 that guide the escaper portion 31, and the upper surface of the screw receiving portion 311 is also slightly higher. S lifts the head S1. For this reason, as shown in FIG. 9, a gap is generated between the head S <b> 1 and the escaper guide portion 312, so that the screw holding portion 332 at the tip of the stopper 33 enters the gap and prevents the screw S from falling off. To do.
Since the pressing force of the coil spring 331 is weak enough to lightly prevent the screw S from dropping off, the pressing force of the coil spring 331 is weaker than the force of the tip protruding portion 321 of the screw discharging mechanism (unit) 32 in the next protruding step.

The screw ejecting mechanism (unit) 32 will be described with reference to FIGS.
FIG. 10 is a diagram showing a state in which the head S1 of the screw S is pushed forward by the tip ejecting part 321 of the screw ejecting mechanism (unit) 32, and FIG. 11A shows the stopper 33 in that case. FIG. 11 (b) is a plan view of the state. As shown in FIGS. 12 (a) and 12 (b), the tip ejecting portion 321 of the screw ejecting mechanism (unit) 32 is attached to the tip of a rotating arm 323 attached to the rotating shaft 3221 of the rotary solenoid 322. .
When the rotation of the escaper unit 31 is stopped, the rotary solenoid 322 is turned on by turning on the power of the rotary solenoid 322. In this embodiment, the rotary solenoid 322 is turned about 30 degrees, and the power is turned off. Then, it returns to its original position by a spring incorporated in the rotary solenoid 322.
The shape of the tip protruding portion 321 may be a flat shape, but in this embodiment, as shown in FIG. 12, the shape is a V shape that is released forward as shown in FIG. The head S1 is accurately played forward. Note that the tip protrusion portion 321 to the rotating arm 323 is provided with a plurality of angle adjustment portions 324 including a claw portion 3211 and a screw portion 3212, and the claw portion 3211 is adapted to the size and shape of the screw S to be supplied. The front / rear position, height, and angle of the angle adjustment unit 324 can be adjusted by the screws 3241 and the long holes 3242.

The repelled screw S is detached 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).
It is thrown into.
This operation will be described with reference to FIGS. 13 (a) to 13 (d). FIG. 13 (a) shows a state in which the screw receiving portion 311b of the escaper portion 31 is rotationally moved and stopped at the ejecting position. When detected by the detection mechanism 4, in FIG. 13B, the power of the rotary solenoid 322 is turned on, and the rotating arm 323 and the tip ejecting portion 321 start to rotate. In FIG. 13C, the tip ejecting portion. 321 captures the head S1 of the screw S and flips it to the screw storage part 12 in front of the supply port 34 as shown in FIG. 13 (d). As described above, after the screw S is ejected, the rotary solenoid 322 is turned off, returns to the original position in the order of FIG. 13 (c) → FIG. 13 (b) → FIG. Prepare for the release of the screw S.

14A and 14B, the screw holding portion 332 of the stopper portion 33 has no screw S, and the screw holding portion 332 is also returned 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 input from the supply port 34 to the screw storage portion 12, supply of the screws S is once terminated. Then, the screw S of the screw storage portion 12 is transferred to the palm 193 or the movable screw storage container 191. Then, when the user puts out the palm 193 to receive the next set screw S, or when 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.

A 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 disposed under the screw storage section 12 attached to the screw feeder 1, and the opening operation is performed at the container front end 192 in the moving 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 a 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 with the fingertip 194 of the hand (the arrow in FIG. 3B). ), The opening 121 is opened, and all the screws S in the screw storage portion 12 can be dropped on the palm 193.

As described above, according to the embodiment of the screw ejecting mechanism 32 in the screw feeder 1 of the present invention, the screws are horizontally placed one by one from the screw feeder 1 as in the conventional screw feeder for the driver bit B. Also in the screw supply 1 cut out in the direction, the screw S can be used as a screw supply device for a bit by stopping the operation of the screw release mechanism 32, and the screw S can be used as a screw storage portion by the screw release mechanism 32. A predetermined number of screws can be loaded into 12 and supplied at a high speed. Actually, the cutting speed of the screw S in Patent Document 3 described above was about 1.5 seconds / piece, but in this embodiment, about 0.6 seconds, which is about three times faster, can be cut out and supplied. it can.
Further, the screw ejecting mechanism 32 is provided with a claw portion 3211 whose front is struck by a V-shape by hitting the side portion of the head S1 of the screw S, and ejects the screw S in a certain direction. Can be supplied.
Needless to say, the present invention is not limited to the above-described embodiments as long as the features of the present invention are not impaired.

S ・ ・ Screw (Class), S1 ・ ・ Head (Screw), B ・ ・ Bit,
1 ... Screw supply, 11 ... Counter, 111 ... Set display,
112 .. Set total display section, 113, 114... Set number setting button,
115 ... Buzzer volume setting button, 116 ... LED
12 .. Screw housing part, 121 .. Opening part, 1211 ... Opening operation lever,
122 .. Light sensor (container removal sensor), 13 .. Power switch,
14 .... Start switch, 15 .... Inlet, 151 .... Inlet cover,
16. Front cover, 17. LED, 18. Operation switching button,
191 ... Screw storage container, 192 ... Container tip, 193 ... Palm,
194 ...
2 .. Screw supply part, 21 .. Alignment rail, 22 .. Discharge port,
3. Screw removal mechanism, 31 Escaper part, 311 (a, b), Screw receiving part,
312 .. Escaper guide part,
32 .. Screw ejecting mechanism (unit), 321..
3211..Nail part,
322 .. Rotary solenoid, 3221.
323 .. Rotating arm, 324 .. Angle adjustment section, 3241.
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 (3)

In the screw supply that cuts out the screws one by one from the screw feeder in the horizontal direction,
A screw ejecting mechanism for a screw feeder, wherein a screw that is cut out from a screw cutting mechanism is ejected by a screw ejecting mechanism, and a predetermined number of screws are inserted into a screw storage portion.   2. The screw feeder according to claim 1, wherein the screw ejecting mechanism is provided with a claw portion that is released in a V shape at the front side when the side of the head of the screw is hit, and ejects the screw in a certain direction. Screw-out mechanism.   The screw feeding mechanism of the screw feeder according to claim 2, wherein the position of the claw part is adjusted by a plurality of adjusting mechanisms for attaching the screw feeding part to the frame.

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