JP2002087581A - Device for separating and supplying headed rod member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for separating and supplying a headed rod member capable of improving headed rod member separating and supplying ability. SOLUTION: This device is provided with a hopper part 3 capable of storing a number of headed rod member, a separation plate rotatably provided at a bottom part of the hopper part 3 to be inclined for a specified angle from horizontal, and provided with plural through-holes 9 in which the headed rod members such as screws can be engaged uniformly disposed in an outer circumferential part, and an air suction part to suck air from the through-holes 9 in the separation plate 9. The air suction part has a communication hole 10a capable of sucking air from a specified through-hole 9b at a position of the headed rod member as deflected in a rotation direction of the separation plate 9 as the separation plate 9 is rotated, thereby the headed rod member can be efficiently sucked and held to the through-hole 9b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for separating and feeding a headed bar, such as a minute screw, which is difficult to feed air using a feeding hose.

[0002]

2. Description of the Related Art Conventionally, when a headed bar such as a screw is supplied to a working device such as an automatic screwing machine, a feeder and a working device are connected by a feed hose, and the feed hose is used. A method has been adopted in which screws separated and supplied by a feeder are fed by compressed air. However, short-headed rods with shorter leg lengths relative to the head diameter, and micro-headed rods such as micro-screw used in precision equipment such as portable devices and cameras, are inverted in the feeding hose. In many cases, it is very difficult to feed the air.
No. 3 gazette disclosed in Japanese Patent Publication No.
(Hereinafter simply referred to as a separate supply device).

[0003] The separating and feeding apparatus disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 5-58433 has a hopper capable of storing a large number of rods with a head, and is provided in the hopper so as to be rotatable at a predetermined angle from horizontal and rotatable. A separation plate in which a plurality of through-holes into which a headed bar can be fitted are equally arranged, and an air suction unit that sucks air from the through-hole of the separation plate and suctions the headed bar into the through-hole, A pulse motor as a rotation drive source for intermittently rotating the separation plate at every pitch of the through hole. In this separation supply device, the separation plate rotates intermittently in response to the driving of the pulse motor, whereby the through holes are sequentially rotated to a predetermined take-out position and temporarily stopped. At the take-out position, a sensor is provided to detect whether or not a screw is held in the through-hole. When this sensor detects that there is a screw in the through-hole, an automatic screw tightener or the like is activated. The screw is taken out from the through hole at the take-out position.

[0004]

However, in the above-mentioned conventional separation and supply device, the headed bar group in the hopper is rotated in the rotation direction of the separation plate due to friction with the separation plate surface as the separation plate rotates. Biased toward. On the other hand, the suction hole of the air suction part has a symmetrical shape with respect to the vertical center of the separation plate, and air can be suctioned from a through hole within a predetermined range below the separation plate.
For this reason, if the headed bar group is deviated in the rotation direction of the separation plate as described above, air suction is performed at some through-hole positions, but the headed bar material does not fit at all,
In other words, a phenomenon occurs in which there is no bar with a head that can be fitted, and problems such as a decrease in the efficiency of separation and supply have occurred.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has a hopper portion capable of storing a large number of headed bars, and a bottom portion of the hopper portion which is inclined at a predetermined angle from horizontal. A separation plate provided rotatably so as to be rotatable and having an outer peripheral portion into which a plurality of through-holes into which a headed bar can be fitted, and an air suction unit that sucks air from the through-hole of the separation plate. A separating and feeding device for a bar with a head, wherein the air suction unit is configured to supply air from a predetermined through hole at a position of the bar with a head that is deviated in the rotation direction of the separation plate as the separation plate rotates. It is characterized by having a communication hole provided so as to be able to perform suction.

It is preferable that a plurality of stirrers are arranged on the separation plate in the vicinity of the arrangement line of the respective through holes, and the stirrers protrude from the separation plate. Preferably, the protruding surface from the separation plate is formed as a curved surface.

[0007]

FIG. 1 is a block diagram showing an embodiment of the present invention.
This will be described with reference to FIGS. 1 to 6,
1 is a separation and supply device for a bar with a head (hereinafter referred to as a separation and supply device 1).
And a hopper portion 3 capable of storing a large number of small screws 2 which is an example of a rod with a head that is difficult to feed air. The hopper section 3 includes a pedestal section 5 attached to a base 4 and a cylindrical bucket section 6 attached to the pedestal section 5 at a predetermined angle. The upper open end face of the bucket portion 6 has a horizontal surface 6a and a vertical surface 6a.
In order to increase the area of the opening, it is easy to insert a screw, and the inside of the bucket 6 is easily recognized.

The pedestal 5 of the hopper 3 has a bearing 7
The main shaft 8 rotatably supported by is inserted through,
At one end of the main shaft 8, a separation plate 9 disposed on the upper surface side of the pedestal portion 5, that is, a position corresponding to the bottom portion of the hopper portion 3.
Are connected so as to rotate together. A ring plate 10 made of resin is interposed between the separation plate 9 and the pedestal portion 5 in order to improve the air suction confidentiality described later. Further, the separation plate 9 and the main shaft 8 are connected to the wing bolt T
The separation plate 9 can be easily removed and replaced.

The separation plate 9 has a disk shape with a chamfered portion 9a provided on the circumference thereof.
A through hole 9b extending in a direction perpendicular to the chamfered portion 9a and penetrating the separation plate 9;
An agitating pin 9c, which is an example of an agitating unit that is driven so as to project a head upward, rotates around the rotation center of the separation plate 9,
That is, a plurality of pieces are alternately arranged on the same line at a predetermined pitch around the axis of the main shaft 8. Through hole 9b ...
Has a diameter such that the legs of the screw (screw portion) can be inserted and the head cannot enter, and when it moves to the highest position with the rotation of the separation plate 9, it is oriented vertically. . That is, the angle of the chamfer 9a is set as such. In the present separation supply device 1, the highest position of the separation plate 9 is set to the screw take-out position. As shown in FIG. 4, each of the stirring pins 9c has a curved head shape protruding above the chamfered portion 9a.

At a position corresponding to the lower portion of the separation plate 9 in the pedestal portion 5, a suction hole 5a to which a suction hose (not shown) extending from an air suction device (not shown) can be connected.
A communication hole 10a is formed in the ring plate 10 so that the suction hole 5a and a predetermined through hole 9b of the separation plate 9 communicate with each other. As shown in FIG. 1, the communication hole 10a has an arc shape that is symmetrical with respect to an inclined center line L2 that is inclined at a predetermined angle θ in the rotation direction of the separation plate 9 indicated by an arrow Y2 with respect to the vertical center line L1 of the separation plate. The air suction can be performed through predetermined through-holes 9b communicating with the communication hole 10a. That is, in the separation and supply device 1, the air suction portion described in the claims is formed by the suction hole 5a, the communication hole 10a, the suction hose, the air suction device, and the like.

A suction hose 11, which is different from the above-mentioned suction hose and extends from an air suction device (not shown), is connected to a position corresponding to the screw take-out position (highest position) of the separation plate 9 in the pedestal portion 5. The ring plate 10 is provided with a communication hole 10b for communicating the through hole 9b at the take-out position with the suction hole 5b. Further, a vacuum switch 12 is provided on the suction hose 11 connected to the suction hole 5b,
A configuration in which a pressure change in an air suction path from the through hole 9b of the separation plate 9 to the vacuum switch 12 via the communication hole 10b, the suction hole 5b, and the suction hose 11 is detected, and the air insertion state can be confirmed. Have been.

On the other hand, a rotation transmission gear 13 and a positioning cam 14 are attached to the other end of the main shaft 8 so as to rotate together. The other end of the main shaft 8 is attached to a bracket attached to a lower portion of the base 4. 4a rotatably supported.

As shown in FIG. 5, the rotation transmission gear 13
Is a gear in which a predetermined number of teeth are formed on a circumferential portion, and an index gear 15 is configured to intermittently mesh with the rotation transmission gear 13. The positioning cam 14 is
.. Are sprocket-shaped cam members having a plurality of arc-shaped notches 14a... Of a predetermined radius continuously arranged on the circumference of the disc. The index cam 16 intermittently engages with the positioning cam 14. It is configured.

The index gear 15 and the index cam 16 are fixed to a drive shaft 17 which extends in parallel with the main shaft 8 and is rotatably arranged, and rotates integrally with the rotation of the drive shaft 17. It is configured as follows. The index gear 15 is
It is a gear of a special shape in which a tooth portion 15a that can mesh with the teeth of the rotation transmission gear 13 is formed only within a predetermined range of the circumferential portion, and the peripheral portion other than the tooth portion 15a does not interfere with the rotation transmission gear 13. (See FIG. 5). The rotation transmission gear 13 rotates only while it meshes with the tooth portion 15a of the index gear 15 while the index gear 15 makes one rotation, and the separation plate 9 receives one pitch of the through hole 9b. Spin for a minute. That is, the formation range of the tooth portion 15a of the index gear 15 is designed in accordance with the pitch of the through holes 9b of the separation plate 9. The mounting position of the indexing gear 15 is adjusted so that the indexing gear 15 has a meshing relationship with the rotation transmitting gear 13 at a timing at which the through holes 9b of the separation plate 9 sequentially stop at the take-out position at each intermittent rotation.

The indexing cam 16 has an engaging circumferential portion 1 having the same radius as the arc-shaped notch 14a of the positioning cam 14.
6a, and a portion other than the engagement circumferential portion 16a has a diameter that does not interfere with the positioning cam 14 (see FIG. 5). When the index gear 15 starts to mesh with the rotation transmission gear 13, the engaging cam 16 separates from the arc-shaped notch 14 a of the positioning cam 14 so that the index gear 15 and the rotation transmission gear 13 The positional relationship with the indexing gear 15 and the like is adjusted so that the engagement circumferential portion 16a engages along the arc-shaped notch 14a when the meshing is released.

The drive shaft 17 includes an output shaft 18a of a synchronous motor 18 (hereinafter, simply referred to as a motor 18) mounted on the bracket 4a and transmission gears 19a, 19b.
And is configured to rotate by receiving the drive of the motor 18. The drive shaft 17 is provided with a dog 20 provided with a projection 20 a projecting in the circumferential direction of the drive shaft 17.
The base 4 is provided with a sensor 21 so that the protrusion 20a can be detected. This sensor 21 and dog 20
The sensor 21 detects when the separation plate 9 has been intermittently rotated by the action of the index gear 15 and the rotation transmission gear 13.
The attachment positions of both are adjusted so that the projection 20a of the dog 20 is detected and turned on.

In the separation and supply device having the above structure,
When the motor 18 is driven, the drive shaft 17 rotates, and the index gear 15, the index cam 16 and the dog 20 rotate integrally. The rotation is intermittently transmitted to the rotation transmission gear 13 with the rotation of the index gear 15, whereby the separation plate 9 intermittently rotates in the direction of the arrow Y2. At this time, the rotation transmission gear 13
When the index gear 15 is disengaged from the index gear 15 (when the separation plate 9, the main shaft 8 and the like are stopped), the engaging circumferential portion 16a of the index cam 16 is engaged with the arc-shaped notch 14a of the positioning cam 14. Therefore, the rotation transmission gear 13, the main shaft 8, and the separation plate 9 can be accurately positioned on the spot. That is, when the rotation transmission gear 13 and the index gear 15 are disengaged from each other, the rotation transmission gear 13, the main shaft 8, the separation plate 9 and the like are prevented from rotating freely, and the rotation transmission gear 13 is disengaged due to a displacement. Outgoing gear 15 and rotation transmission gear 13
At the time of re-engagement, and the shift of the intermittent stop position of the separation plate 9 can be prevented. In addition, even when the power supply of the apparatus is turned off, a rotational load due to the motor-specific reduction ratio acts in addition to the above-described operation, so that the separation plate does not rotate and the intermittent stop position does not shift. . Thus, the position indexing accuracy in the intermittent rotation of the separation plate 9 is always maintained at a high accuracy.

When the suction of the air from the suction hole 5a is started by the operation of the air suction device while the separation plate 9 is intermittently rotating, the screws 2 stored in the hopper 3 are removed.
It is sucked and held in the through hole 9b of the separation plate 9 and transferred to the take-out position. At this time, screws 2 in the hopper 3
Is hit by the stirring pin 9c of the separation plate 9 and is stirred, so that the probability of being sucked and held in the through hole 9b is extremely high. Moreover, since the portions of the stirring pins 9c protruding from the chamfered portions 9a are curved, the screws 2 are not damaged during stirring.

In addition, with the intermittent rotation of the separation plate 9, the screws 2... In the hopper portion 3 are rotated in the rotation direction of the separation plate (arrow Y2) due to friction with the separation plate 9, stirring by the stirring pins 9c. Direction).
On the other hand, since the communication holes 10a are arranged in a shape symmetrical with respect to the inclined center line L2, that is, in a shape extending in a direction offset in the rotation direction of the separation plate 9, the communication holes 10a Are biased in the rotation direction of the separation plate 9, these screws 2 can be efficiently suction-held in the through holes 9b.

On the other hand, at the take-out position corresponding to the highest position of the separation plate 9, air is sucked from the suction hole 5b. When a screw is held in the through-hole 9b communicating therewith, the through-hole is not used. 5b to communication hole 10b, suction hole 5
b, the vacuum pressure in the path leading to the vacuum switch 12 via the suction hose 11 rises,
Turns on. At the same time, when the through hole 9b reaches the take-out position, the sensor 21 is turned on. Therefore, when the sensor 21 is turned on and the vacuum switch 12 is turned on, the through-hole 9b at the take-out position is turned on. , The motor 18 is temporarily stopped on the assumption that the screw 2 is held.

Thereafter, when the screw 2 of the through hole 9b at the take-out position is taken out by the action of a screwing machine or the like,
Since the vacuum switch 12 is turned off while the sensor 21 is on, the motor 18 is driven in response to this, and the intermittent rotation of the separation plate 9 is restarted. In this way, it is possible to confirm whether or not the screw 2 is held in the through-hole 9b that has sequentially reached the take-out position, and separate and supply the screw 2.

In the above-mentioned separation and supply operation of the screw 2, even when the portion where the through hole 9b is not formed passes through the communication hole 10b during the intermittent rotation of the separation plate 9, the communication hole 1
Since the vacuum pressure in the path from 0b to the vacuum switch 12 increases and the vacuum switch 12 is turned on, the device may malfunction. However, the present separation supply device 1
As described above, since the signals from the vacuum switch 12 and the sensor 21 for detecting the completion of the intermittent rotation are viewed as described above, it is possible to prevent a malfunction caused by the ON signal of the vacuum switch 12 when there is no through hole 9b at the take-out position. Can be.

Although the embodiment of the present invention has been described with respect to an example in which minute screws 2 are separated and supplied, the separation and supply device according to the present invention is not limited to screws, such as rivets, pins with heads, and nails. The headed bar can be separated and supplied. Even when the headed bar other than these screws is separately supplied, the same effect can be obtained. Also,
The stirring section does not necessarily need to be constituted by the stirring pin 9c as described above, and a similar stirring effect can be obtained even with a hole or a groove provided in the separation plate 9. Further, the stirrer does not necessarily need to be provided on the arrangement line of the through holes 9b, and may be provided on a line deviated from the arrangement line of the through holes 9b as long as the action of stirring the headed bar near the through hole 9b can be obtained. Can be done.

FIG. 7 shows another embodiment of the present invention. The communication hole 10a 'shown in FIG.
The communication hole 10a has a shape extending in a direction opposite to the rotation direction Y2 of the separation plate 9. In other words, the communication hole 10a 'is a so-called Japanese Patent Application Laid-Open No.
The air suction hole described in JP-A-58433 is formed to extend in the rotation direction side of the separation plate, and the same effect as described above can be obtained even if the communication hole is configured as shown in FIG.

[0025]

According to the apparatus for separating and supplying a rod with a head according to the present invention, the air suction holes are provided so as to extend at a predetermined angle in the rotation direction of the separation plate. Thus, even if the headed rods such as screws stored in the hopper are deviated in the rotation direction of the separation plate, they can be efficiently sucked and held in the through holes. Therefore,
The capability of separating and supplying the bar with the head is improved, and effects such as efficient separation and supply can be obtained.
In addition, since the stirrer such as the stirrer pin as exemplified above is provided in the vicinity of the arrangement line of the through-holes, when the separation plate is rotated to stir the headed bar, the headed bar in the hopper is used. Irrespective of the storage amount of the material, it is possible to agitate the rod with the head in the vicinity of the passing position of the through hole as a center to activate these posture changing operations. Therefore, the suction holding ratio (the fitting ratio to the through-hole) of the bar with the head in the through hole is increased, and the effect of separating and supplying the bar with the head more efficiently can be obtained.

[Brief description of the drawings]

1 is an enlarged view of the vicinity of a separation plate when viewed from a direction indicated by an arrow Y1 in FIG. 2 (a direction directly opposite to the separation plate).

FIG. 2 is a partially cutaway sectional view taken along line AA of FIG. 3;

FIG. 3 is a plan view of the apparatus for separating and feeding a rod with a head according to the present invention.

FIG. 4 is an enlarged cross-sectional view of a main part along line BB in FIG. 1;

FIG. 5 is an enlarged sectional view of a main part taken along line CC of FIG. 2;

FIG. 6 is an enlarged cross-sectional view of a main part of the apparatus for separating and feeding a rod with a head according to the present invention.

FIG. 7 is an enlarged view of the vicinity of the separation plate when the apparatus for separating and feeding a headed bar according to another embodiment of the present invention is viewed from the same direction as in FIG.

[Explanation of symbols]

 Reference Signs List 1 Separating and feeding device for bar material with head 3 Hopper part 5 Pedestal part 5a Suction hole 5b Suction hole 6 Bucket part 9 Separation plate 9b Through hole 9c Stirring pin 10 Ring plate 10a Communication hole 10b Communication hole 11 Suction hose 12 Vacuum switch 13 Rotation Transmission gear 14 Positioning cam 15 Indexing gear 16 Indexing cam 18 Synchronous motor 20 Dog 21 Sensor

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3F075 AA01 BA01 BB01 CA04 CA08 CC04 CC16 CC19 CD14 DA13 3F080 AA24 BA01 BF11 BF22 CC04 CC10 CC13 CG15 DA09 DA18 EA09 EA10 FB05

Claims (3)

[Claims] 1. A hopper portion capable of storing a large number of headed bars, and a hopper which is provided at the bottom of the hopper so as to be rotatable at a predetermined angle from horizontal and is rotatable, and the headed bars can be fitted to an outer peripheral portion thereof. A separation plate feeding device having a separation plate in which a plurality of through holes are equally arranged, and an air suction unit that suctions air from the through holes of the separation plate, wherein the air suction unit is It has a communication hole provided so that air can be sucked from a predetermined through hole at a position of a bar with a head that is deviated in the rotation direction of the separation plate as the separation plate rotates. An apparatus for separating and feeding a rod with a head, comprising: 2. The apparatus for separating and feeding a rod with a head according to claim 1, wherein a plurality of stirrers are arranged on the separation plate in the vicinity of the arrangement line of the through holes, and a plurality of agitators are equally arranged. . 3. The head-separated bar according to claim 2, wherein the stirring section is configured to protrude from the separation plate, and a protruding surface from the separation plate is formed as a curved surface. Feeding device.