JP4476613B2 - Parts supply device - Google Patents

Description

  The present invention relates to a component supply device that aligns and supplies headed shaft components such as screws and screws stored in a stocker.

2. Description of the Related Art Conventionally, in this type of component supply device, there is known a device that conveys a component while supporting the component with a pair of endless wires that are circulated (see, for example, Patent Document 1).
JP 2000-302234 A (summary, FIG. 1)

In the invention of Patent Document 1, parts are conveyed by a pair of endless wires that are circulated and driven, thereby preventing the parts from being clogged during conveyance and conveying the parts continuously.
However, it is difficult to form an endless wire, and the cost is high. In addition, there is a problem that it is necessary to adjust the tension of the wire or that the pulley for driving the wire is enlarged.

  Accordingly, an object of the present invention is to provide a component supply device that can improve the supply efficiency of components with a compact structure.

  In order to achieve the above object, a component supply device of the present invention is a component supply device that supplies a component from a stocker in which components having a shaft portion and a head portion that protrudes in a radial direction from the shaft portion are stored. A pair of lifting means that lifts and drops some or all of the parts of the stocker, and a rail that protrudes from the head of the part and forms a rail that can hold the part in a suspended state in which the shaft part enters. And a guide portion for guiding a part dropped by the lifting means between the pair of wires, the wires being reciprocally oscillating in parallel to each other and along the axial direction of the wires. A component that is stretched in a state and is inclined obliquely downward toward the conveying direction of the component and is supported on the pair of wires by being reciprocally oscillated in the axial direction. Heading downstream Characterized by conveying.

  According to the present invention, the parts are conveyed by the pair of reciprocating wires, so that the parts can be prevented from being clogged and continuously conveyed (supplied), and the supply efficiency of the parts can be improved. In addition, since it is not necessary to form the wire endlessly, the structure is simplified and the cost can be reduced. Further, since the vibrating member is only a wire, vibration and vibration noise are reduced, and the working environment is improved.

In the present invention, the wires are bridged between a pair of pulleys, the axes of the pulleys are set horizontally, and support frames that rotatably support the pair of pulleys are arranged along the longitudinal direction of the wires. Two are preferably provided in parallel.
According to this aspect, the wire support structure becomes compact, and the entire apparatus can be miniaturized.

In the present invention, there is further provided reversing means for vertically reversing the inverted part in which the head part of the part is placed on the pair of wires with the shaft portion of the part facing up, and the reversing means is the reverse The head of the standing part is flipped upward from below .
According to this, it is possible to correct and convey the posture of a part having a short shaft portion that tends to be inverted.

In the present invention, the reversing means has a pair of pins that repeatedly swing about a horizontal axis, and the pins have a tip that pushes up or jumps up the head of the component, and the tip is the wire. It is preferable to reciprocally vibrate between a first position which is lower than the first position and a second position where the tip of the pin is higher than the wire.
By doing so, the structure of the inverting means becomes compact. Note that the operations of the pair of pins may be performed simultaneously, but it is more effective to operate alternately by changing the phase.

Prior to the description of the embodiments of the present invention, reference examples useful for understanding the present invention will be described with reference to the drawings.
1 to 5 show reference examples .
In FIG. 1, the component supply device 1 includes a cylindrical portion 2, a motor 5 (an example of a driving unit), a pair of wires 10 and a discharge chute 19. A stocker 3 for storing the component M is formed in the cylindrical portion 2. As will be described later, the supply device 1 supplies the component M by conveying the component M of the stocker 3 with the pair of wires 10 and then discharging it to the discharge chute 19.

  The cylindrical part 2 is rotatably attached to the main body part 100. As shown in FIG. 2, the cylindrical portion 2 is connected to the output shaft 51 of the motor 5 via the transmission member 21, and is rotated in the circumferential direction R (FIG. 1) by driving the motor 5. A lifting means 4 is provided in the cylindrical portion 2.

  The lifting means 4 is made of a thin plate-like member, and a mounting surface 40 is formed. The lifting means 4 rotates integrally with the cylindrical portion 2, and a part or all of the parts M of the stocker 3 are placed on the mounting surface 40 and then dropped.

  As shown in FIG. 3, the guide portion 7, the wire 10, and the removing means 20 are disposed below the part M dropped by the lifting means 4 in the cylindrical portion 2. As shown in FIG. 5, the pair of wires 10 support the head Ma of the component M, and form a rail that can hold the component M in a hanging state in which the shaft portion Mb enters between the wires 10. Yes. The wire 10 passes through the cylindrical portion 2 of FIG. 3 in the front-rear direction and is inclined obliquely downward toward the conveying direction X of the component M.

  As shown in FIG. 4, the wires 10 are bridged between a pair of first and second pulleys 11 and 12. The wires 10 are stretched in parallel with each other and capable of reciprocating in the axial direction X1 (FIG. 3) of the wires 10 by a reciprocating drive mechanism described later. The axis C1 of the first pulley 11 is set to be horizontal, while the axis C2 of the second pulley 12 is set to be slightly inclined from the vertical direction to the transport direction X as shown in FIG. The pulleys 11 and 12 are supported so as to be rotatable around their respective axes C1 and C2.

  The guide portion 7 is composed of two plate members arranged in a V shape facing downward, and guides the component M dropped by the lifting means 4 between the pair of wires 10. To do. The guide portion 7 is fixed to two support frames 110 provided in parallel with each other along the longitudinal direction of the wire 10.

  As shown in FIG. 3, the removing means 20 has a pair of scrapers 22 that swings repeatedly about a horizontal axis O. The throwing bar 22 repeatedly swings up and down in the vicinity of the wire 10 to remove and remove the component M that has not been correctly placed on the wire 10. Each of the scrapers 22 is formed in a substantially L shape having a contact portion 23 protruding upward. The contact portion 23 is always in contact with the end face 80 of the cylindrical cam 8 as shown in FIG. 2 by a spring 24 provided between the scraper 22 and the support frame 110. Accordingly, the contact member 23 is swung in accordance with the unevenness of the end face 80, and thereby the throwing bar 23 is swung up and down around the horizontal axis O. In addition, each said wand 22 is moved up and down alternately so that a mutual phase may differ.

Next, the reciprocating drive mechanism of the wire 10 will be described.
As shown in FIG. 3, one end of each wire 10 is fixed to a swinging portion 54 provided below the first pulley 11. On the other hand, the other end of each wire 10 is fixed to the second pulley 12 itself. The drive unit 54 periodically swings up and down as shown by an arrow A in conjunction with the drive of the motor 5 by the operation of a cam mechanism (not shown). The second pulley 12 is always urged in one direction θ1 (FIG. 4) around the axis C2 by a spring 35 provided on the rotating shaft.

  When each wire 10 is tensioned in the axial direction X1 and the drive unit 54 is raised, the second pulley 12 is rotated in the urging direction θ1, while when the drive unit 54 is lowered, the second pulley 12 is rotated. The pulley 12 rotates in a direction θ2 (FIG. 4) opposite to the biasing direction θ1. As described above, when the driving unit 54 repeats swinging up and down, the wires 10 are reciprocally oscillated in the axial direction X1.

Next, the operation of the supply device 1 will be described.
In FIG. 2, when the cylindrical portion 2 rotates in the circumferential direction R by driving the motor 5, part or all of the parts M stored in the stocker 3 are placed on the placement surface 40 of the lifting means 4 and It is lifted along the inner peripheral surface of the cylindrical portion 2. Thereafter, the mounting surface 40 tilts with the rotation of the lifting means 4, so that the component M is dropped from the mounting surface 40.

  The dropped part M is guided between the pair of wires 10 by the guide portion 7 of FIG. Some or all of these components M are held in a suspended state with the head Ma supported by the wire 10 as shown in FIG. At this time, the part M that has not been held in the suspended state is removed from the wire 10 by being removed by the release bar 22.

As described above, the pair of wires 10 are inclined obliquely downward toward the conveying direction X of the component M (see FIG. 3) and are reciprocally oscillated in the axial direction X1, The part M held on the pair of wires 10 is conveyed downstream.
As described above, since the component M is conveyed by the pair of wires 10 that reciprocally vibrate, the component M can be continuously conveyed, so that the supply efficiency of the component can be improved .

Next, Example 1 of the present invention will be described. In the following description, will be mainly described which differ from those of the foregoing reference example, the same configuration as the reference example, the details are omitted with the same reference numerals.

As shown in FIG. 6, in the component supply device 1 </ b> B according to the first embodiment, the first and second pulleys 11 and 12 on which the wires 10 are bridged are cantilevered by the support frame 110. ing. Two support frames 110 are provided in parallel with each other along the longitudinal direction of the wire 10 and rotatably support the pair of pulleys 11 and 12.

  FIG. 7 is a schematic perspective view illustrating a configuration of a main part of the supply device 1B. As shown in this figure, the axes C1 and C2 of the pulleys 11 and 12 are set horizontally. One end of each wire 10 is fixed to a fixing portion 120 (FIG. 6) of the support frame 110 via a moving rod 34 and a coil spring 36. On the other hand, the other end of each wire 10 is fixed to a swinging portion 54 provided below the second pulley 12.

  The oscillating portion 54 is rotatably supported around a support shaft 55 provided horizontally, and is in contact with the cam surface 58 a of the cam 58 via a roller 56. The cam surface 58a of the cam 58 is provided with irregularities periodically. When the cam 58 is rotated by the motor 5, the unevenness of the cam surface 58 a alternately contacts the roller 56, so that the swinging portion 54 swings around the support shaft 55. The wire 10 is reciprocally oscillated in the axial direction X1 by the swinging of the swinging portion 54 and the expansion and contraction of the coil spring 36.

Inversion means:
As shown in FIG. 7, a reversing means 30 is provided in the vicinity of the wire 10 on the upstream side. The reversing means 30 is for vertically reversing an inverted part M to be described later. The reversing means 30 includes a pair of pins 31 that repeatedly swing around a horizontal axis C3. The pin 31 is wound around a support shaft 32 in FIG. 6 and is rotatably supported by the support shaft 32. The support shaft 32 is provided from the support frame 110 along the horizontal axis C3. The pin 31 has a distal end portion 31a extending from the support shaft 32 along the longitudinal direction of the wire 10, and a proximal end portion 31b extending downward from the support shaft 32.

  The lower end of the base end portion 31b penetrates the moving rod 34 in the radial direction. Since the moving rod 34 is reciprocated in the axial direction X1 of the wire 10 together with the wire 10, the pin 31 is repeatedly swung around the horizontal axis C3 in conjunction with the reciprocating vibration of the wire 10. . At this time, the distal end portion 31a has a first position P1 that is lower than the wire 10 indicated by a solid line in FIG. 6 and a second position that is higher than the wire 10 indicated by a two-dot chain line in FIG. Oscillates back and forth between the position P2.

  As shown in FIG. 8, the part M dropped by the lifting means 4 (FIG. 6) is such that the shaft Mb of the part M is on top and the head Ma of the part M is placed on the pair of wires 10. There may be an inverted state. The reversing means 30 pushes up or flips the head portion Ma of the component M upward from below by the tip portion 31 a of the pin 31, thereby inverting the inverted component M upside down. Therefore, since the inverted posture of the component M that tends to be in an inverted state, such as a screw having a short shaft portion Mb, can be corrected, the number of misaligned components M is reduced, and the supply efficiency of the component M is improved. .

  The part M that has not been corrected to the hanging posture by the reversing means 30 is removed from the wire 10 by the removing means 20B provided downstream of the transport path of the wire 10. In this embodiment, the removing means 20B is an impeller that rotates around a horizontal axis O as shown in FIG.

Extraction means:
As shown in FIG. 6, an extraction means 60 is provided at the downstream end of the chute 19 that is the discharge path of the component M. The take-out means 60 is for temporarily storing the parts M discharged to the chute 19 and taking out a predetermined number of pieces. The take-out means 60 has cut-out means (solenoid) 61, sensor 62a and take-out instruction lamp 62b. The sensor 61a detects when a predetermined number of parts M have accumulated in the chute 19. The take-out instruction lamp 62b lights up in response to a signal from the sensor 61a, and notifies the operator that a predetermined number of parts M can be taken out.

  FIG. 9 is a front view and a sectional view of the take-out means 60. As shown in FIG. 9A, the take-out means 60 includes a movable part 64 and a gate 65. The gate 65 is attached to the movable portion 64 so as to be able to reciprocate in the width direction Y of the chute 19. The movable portion 64 is urged in a direction away from the chute 19 in the width direction Y (right direction in FIG. 9) by two coil springs 68 and 69 shown in FIG. 9B.

  As shown in FIG. 9B, the cutting means 61 includes a guide fitting 61a and a cutting bar 66. The cutting bar 66 is attached to the movable portion 64 and is slidably guided in the width direction Y by the guide fitting 61a. A screw 63b shown in FIG. 6 is rotatably incorporated in the guide fitting 61a. The screw 63b rotates as the rotary knob 63a rotates, and moves the guide fitting 61a in the longitudinal direction X2. Therefore, the operator can change the position of the cutting bar 66 by rotating the rotary knob 63a to change and set a predetermined number of parts M.

  In the storage state indicated by the solid line in FIG. 9A, the gate 65 blocks the discharge port 19a of the chute 19, and the cutting bar 66 retracts so that the part M can pass through the chute 19. Has been. On the other hand, in the discharging state shown by the two-dot chain line in FIG. It is assumed that M is not discharged. Therefore, the operator can take out a predetermined number of parts M by pressing the movable part 64 like a two-dot chain line after the take-out support lamp 62 (FIG. 6) is turned on.

By the way, in the present embodiment, the component M is turned upside down by the reversing means 30 in FIG. 7, but as another means for turning the component M upside down, for example, the wire 10 itself may be reciprocated up and down.
Further, the reversing means 30 conveys the component M not only by the component supply device that conveys the component M by the pair of wires 10 that reciprocally vibrate as in this embodiment, but also by the rotational movement of the pair of wires in one direction. The reversing means 30 may be provided in a component supply apparatus of the type.

  INDUSTRIAL APPLICABILITY The present invention can be applied to a supply apparatus that supplies a shaft, a part such as a screw, a screw, a bolt, and a rivet that have a shaft portion and a head that protrudes more radially than the shaft portion while aligning them.

It is a perspective view which shows the supply apparatus concerning the reference example useful for an understanding of this invention. It is a side view of the same apparatus. It is a side view which shows the state which removed the cylindrical part of the apparatus. It is the top view which looked at the same apparatus from the top. It is a perspective view which shows the conveyance state of components. It is a perspective view which shows the supply apparatus concerning Example 1 of this invention. It is a schematic perspective view which shows the structure of the principal part of the apparatus. It is sectional drawing which shows a guide part and an inversion means. It is the front view and sectional drawing which show an extraction means.

1: Parts supply device 3: Stocker 4: Lifting means 7: Guide part 10: Wire 11, 12: Pulley 30: Reversing means 31: Pin 31a: Tip part 110: Support frame C1, C2: Axis of pulley C3: Horizontal Axis X1: Wire axial direction (longitudinal direction)
P1: First position P2: Second position M: Parts Ma: Head Mb: Shaft

Claims (3)

A component supply device that supplies components from a stocker in which components having a shaft portion and a head portion that protrudes in a radial direction from the shaft portion are stored,
Lifting means for dropping after lifting some or all of the parts of the stocker;
A pair of wires that form a rail that can hold the component in a hanging state in which the head of the component protrudes and the shaft portion enters;
A guide unit for guiding a part dropped by the lifting means between the pair of wires,
The wires are stretched parallel to each other and capable of reciprocating vibration along the axial direction of the wires,
The wire is disposed obliquely downward and downward in the component conveyance direction, and reciprocally vibrates in the axial direction, thereby conveying the component supported on the pair of wires toward the downstream. And
Further comprising reversing means for vertically reversing the upside-down component in which the head portion of the component is placed on the pair of wires with the shaft portion of the component facing up,
The reversing means flips up the head of the inverted component from below to above . In Claim 1, each said wire is spanned over a pair of pulleys, respectively.
The rotation center of each pulley is set horizontally,
A component supply device in which two support frames that rotatably support the pair of pulleys are provided in parallel to each other along the longitudinal direction of the wire. 2. The reversing device according to claim 1 , wherein the reversing means has a pair of pins that repeatedly swing about a horizontal axis, the pins having a tip that pushes up or jumps up the head of the component, and the tip is A component supply device that reciprocally vibrates between a first position that is below the wire and a second position where the tip of the pin is above the wire.

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