JPS6076940A - Automatic work supply device - Google Patents

Abstract

PURPOSE:To enable a work to be supplied aligning in one direction, by constituting a device so that a direction of the work such as a stud bolt may be automatically discriminated, in the case of an automatic assembly line in an automobile engine. CONSTITUTION:An automatic work supply device is constituted by a work position alignment mechanism 19 and a work supply mechanism 20. This mechanism 19 provides in a part of its guide ring 21 a work carry-in part 22 to be drilled, and the ring 21 provides in its part deflected almost 90 deg. from this carry-in part 22 a work end discriminating part 24, then the ring 21 provides in its part positioned point-symmetrically with said work end discriminating part 24 a pneumatic cylinder 26 having a work pressing rod 25. While the ring 21 provides a work carry-out part 32 to be drilled, further removably providing a conveying rod 34 in an insertion hole 33. Furthermore, stopper mechanisms 41a, 41b are provided between a guide pipe 40 and a rotary cylinder. By this constitution, the device enables a work to be supplied aligning in one direction.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] Is this invention applicable to, for example, Sudad? This invention relates to an automatic workpiece supply device that determines the direction of a workpiece such as a bolt, aligns the directionality, and automatically supplies the workpiece.

[Technical background of the invention and its problems]

On an automatic assembly line for automobile engines, there is a difference between Suda and Do? When automatically feeding bolts from a parts feeder or a bolt feeder, and chucking the bolts one by one or multiple bolts at a time into the chuck of the bolt & bolt tightening device, make sure to align the bolt bolts in the same direction. There is a need.

Therefore, in the past, long sudad v-bolts were stored in a hopper feeder with the direction of the sudad bolts aligned and fed sequentially, but sudad bolts were rod-shaped with threaded parts at both ends. It is difficult to visually determine the direction of reeds, and mistakes are often made. Furthermore, in the case of short stud bolts, they may be fed by a vibrating parts feeder, but it is difficult to align them in the same direction, and a worker must align them.

[Purpose of the invention]

This invention was made with attention to the above circumstances, and its purpose is to solve the problem of Sudad. An object of the present invention is to provide an automatic workpiece supply device that can automatically determine the direction of workpieces such as bolts and feed them aligned in one direction.

[Summary of the invention]

In this invention, a guide ring whose inner diameter is larger than the length of the workpiece and which allows the workpiece to rotate is provided with a workpiece carrying-in/workpiece-unloading part and a workpiece tip discriminating part, and a guide pin through which the workpiece is inserted into the guide ring is rotatably provided. The opening at one end of the guide pipe is arranged to face the workpiece loading section, the workpiece tip discriminating section, and the workpiece unloading section in this order, so that the workpieces can be conveyed in the same direction.

[Purpose of the invention]

The present invention will be described below based on an embodiment shown in the drawings. 1 and 2 show a work supply device. 1 is a slot feeder, 2 is a first hopper feeder, and 3 is a second hopper feeder. The parts feeder 1 feeds workpieces by vibration, and is partially constituted by a feeder, and as shown in FIG. 3(4), it feeds short workpieces 4a such as suda and dodelto. Then, the unloading section 5 of this parts feeder 1
A linear feeder 6 is provided at the outlet 7 of the linear feeder 6, and an extrusion mechanism 9 is provided at the outlet 7 of the linear feeder 6 for laterally pushing out the carried out workpiece 4a and supplying it to the conveyance path 8.

Further, a first feeder is provided on the opposite side of the feeder 1 across the conveyance path 8. As shown in FIG. 3(B), the second hopper feeders 2 and 3 are adapted to supply a workpiece 4b such as a long stud gel. This first.
Since the second hopper feeders 2 and 3 have the same structure, only one of them will be described. Reference numeral 10 is a container that stores a large number of works 4b... horizontally. This container 1
0 is provided with an outlet 11 at the upper end of the outlet 11.
is connected to the conveyance path 8 via the chute 12. Furthermore, a protruding mechanism 13 is provided at the bottom of the container 10, and is configured to push up the works 4b in the container 10 from below and guide them one by one to the outlet 11.

Further, the conveyance path 8 has a V-shape, and a vibration generator 14 for conveying the works 4a, . . . , 4b, . . . in the direction of the arrow is provided at the bottom thereof.

Further, the works 4a and 4b are rod-shaped and have threaded portions 15, 15 carved at both ends, and a tapered or arcuate chamfered portion 16 formed at the tip. Therefore, although these works 4m and 4b have a directionality with the chamfered portion 16 side serving as a leading end, the directionality of the works 4m and 4b conveyed through the conveyance path 8 remains irregular. Further, a downwardly inclined falling sheet 17 is provided at the tip of this conveyance path 8, and this falling chute 12 is connected to an automatic work supply device 18.

As shown in FIGS. 4 to 7, this automatic work supply device 18 is composed of a work alignment mechanism 19 and a work supply mechanism 2θ. First, the workpiece alignment mechanism 19 will be explained. 21 is a guide ring. This guide ring 21 has an inner diameter larger than the length of the workpiece 4b, and is configured so that the workpieces (a, 4b) can rotate within the guide ring 21. A workpiece loading section 22 consisting of a through hole communicating with the workpiece 17 is bored, and a switch 23 (for example, a proximity switch) for detecting the end surfaces of the workpieces 4a and 4b is attached to the guide ring 21 located symmetrically with the guide ring 22. The work loading section 22 and the switch 2
The straight line m l s connecting 3 is inclined at approximately 30° with respect to the horizontal line. Also, approximately 90 meters from the workpiece loading section 22
The biased guide ring 21 is provided with a workpiece tip discriminating part 24, and the guide ring 21 located symmetrically with this part is provided with an air cylinder 26 having a rod 25 for pressing the workpiece. Then, a straight line t! connects this workpiece tip discriminating section 24 and the workpiece pressing port 25! is offset by approximately 90' with respect to the straight line tl. Also,
The workpiece tip discriminating part 24 is inserted into the push 28 inserted into the mounting hole 27 of the guide ring 21 and the through hole 28m of the push &28 so as to be able to move forward and backward. It consists of a detector 30 which is biased so as to be flush with the detector 30 and a switch 31 which faces the end sob of the detector 30 and turns on when the detector 30 is immersed against the force. . The diameter of the through hole 28a of the bush 280 is smaller than the diameter of the works 4h and 4b, and the chamfered portion 1 at the tip thereof is smaller than the diameter of the works 4h and 4b.
6 and 6 are also formed large, and work 4a.

゛(The chamfered portion 16 of 4b faces the tip 30h of the detector 30, and the detector 30 is retracted when it is further pressed. Also, the guide ring 21 has a through hole. A workpiece unloading part 32 is bored, and an insertion hole 33 is bored in the guide ring 21 facing the workpiece unloading part 32.The workpiece unloading part 32 and the guide ring 2)
Direct i! i! l g is located on the horizontal line.

Further, a conveying rod 34 is removably provided in the insertion hole 33, and its base end is connected to a piston 37 of a conveying cylinder 36 via a bracket 35.

A rotating shaft 38 is provided at the center of the guide ring 21 configured in this way, one end of which is connected to a rotating cylinder 39 serving as a rotational drive mechanism, and the other end is rotatably supported by a bearing.

A guide pipe 40 is attached to this rotating shaft 38 and is perpendicular to this axial direction. This guide by f4
0 has an inner diameter through which the work 4*, 4b can be freely inserted,
The openings at both ends thereof are close to the inner circumferential surface of the guide ring 2, and can be turned in the forward direction and reverse direction by rotation of the rotating shaft 38. Furthermore, between the guide pipe 40 and the rotating cylinder 39, there is a strut base mechanism 41a,
4lb is set up and cut out. The stopoya mechanisms 41h and 41b include a rotary disk 43 that is fitted onto the rotating shaft 38 and has a plurality of notches 42h and 42b on the outer periphery, an engager 44 that faces the outer circumferential edge of the rotary disk 43, and an engager 44 that faces the outer circumferential edge of the rotary disk 43. It is composed of a cylinder 45 for protruding and retracting.

Then, the engaging element 44 is selectively engaged with the cutout portions 42m and 42b, and the engagement member 44 is inserted into the guide via the rotating shaft 38.
It is designed to stop at a predetermined position. And on the other hand, Stotsuno J? The engagement element 44 of 41g is connected to the notch 42
By locking with &, the guide tip and ear 40 are positioned at tl, and on the other hand, by locking the engaging element 44 of the no stop t441b with the notch 42b, the guide tip and ear 40 are positioned at tl.
Q is positioned at t2. In addition, when the guide/ear 4 (7) is rotated forward or reverse at t3 and positioned, the stop horn 4' (not shown) built in the rotary cylinder 39 is used to sweep the position. A rotation angle detection plate 46 is fitted to the end of the rotation shaft 38, and faces a retrospective angle detection mechanism 48 equipped with four microswitches 47. The rotation cylinder 39 is rotated by electrically detecting the angle.
is designed to be controlled.

Next, the work supply mechanism 20 will be explained.
50 is a guide ring, which is the workpiece alignment mechanism 19 mentioned above.
The guide ring 21 is formed to have a slightly larger inner diameter. This guide ring 50 has a workpiece loading section 5 formed of a through hole facing the workpiece loading section 32 . Further, two workpiece unloading parts 52a and 52b consisting of through holes are bored in the upper part of the guide ring 50.
Two insertion holes 53a and 53b are provided in the lower part of the guide ring 50 facing this. The guide ring 5 faces the workpiece unloading sections 52a and 52b.
A slider 54 is provided on the top surface of 0 so as to be slidable in the left and right directions, and this
driven by. This slider 54 has a large diameter hole 56.
A pair of large diameter holes 56 and a small diameter hole 57 are drilled in each pair, and a large diameter hole 56 and a small diameter hole 57 are formed in the workpiece unloading section 52 in accordance with the diameters of the workpieces 4m and 4b.
a.

52bK is set to 5 to be selectively opposed.

Further, the insertion holes 53h and 53b are formed in a movable plate 58 which is movable in the width direction of the guide ring 50, and are sister to each other so as to be driven by a cylinder 59.

By moving this movable plate 58, the insertion hole 53m
, 53b can be retracted from the center of the guide ring 500 in the width direction as necessary. Further, an air cylinder 60 is provided at the lower part of the guide ring 50, and this air cylinder 60 has two push-up rods 61, 6.
1 is installed.

The push-up rods 61, 61 are connected to the insertion hole 5.
3a and 53b, the workpiece 4 is
m and 4bl are pushed up to protrude from the workpiece unloading sections 52m and 52b.

A rotary shaft 62 is pivotally supported at the center of the guide ring 50 configured in this way, and this includes a rotary cylinder 63, a stopper, a center mechanism 64, and a rotation angle detection mechanism, similar to the workpiece alignment mechanism 19 described above. 65 are provided. Furthermore, two guide pipes 67m and 67b are attached to the rotating shaft 62 via a u f rack 66, and these can be rotated in the forward and reverse directions within the guide ring 5o by rotation of the rotating shaft 62. It looks like this. These two guide pipes 67m and 61b are kept parallel, and the interval between them is the workpiece unloading section 52a.

52b and the interval between the insertion holes 53m and 53b.

By the way, is 68 the mouth? This is XYzθ
It is attached to a robot head that can move in the direction, and is configured to chuck the workpieces 4a and 4b carried out from the workpiece supply mechanism 2o and convey them to the sudad tightening device. The operation of the work supply device will be explained. For convenience of explanation, the workpiece to be used is shown in Figure 3 (the direction of the long workpiece 4b shown in Figure 2 is aligned,
To explain the case of simultaneous feeding, the works 4b... are fed from the first hopper feeder 2. That is,
The works 4b stored in the container 10 of the first hopper feeder 2 are pushed up by the ejecting mechanism 13, and the tag works 4b are carried out from the outlet 11. Then, the works 4b... roll onto the chute 12'5r and fall onto the conveyance path 8. Workpiece 4b guided to conveyance path 8...
are conveyed in a line in the direction of the arrow by vibration, and are inserted into the workpiece alignment mechanism 19 via the drop chute 17.

At this time, the guide pipe 40 within the guide ring 21 is positioned on the straight line t1 due to the engagement between the notch 42m of the stopper mechanism 41m and the engaging element 44. Therefore, first, the workpiece 4b at the forefront is inserted through the workpiece loading section 22 and slid into the f-id pie fJo by its own weight. When the front end of the workpiece 4b collides with the inner surface of the guide ring 2), the switch 23 causes the workpiece 4b to be guided/
The extraction into the mother ear 40 is detected. switch 23
When the output signal is input to the rotary cylinder 39 and the stopper mechanism 41a, the engager 44 is first removed from the notch 42a, and the rotary cylinder 39 is activated. Therefore, as shown in FIG. 8(4), the rotating shaft 38 is rotated counterclockwise.
rotates 90 degrees, the engaging element 44 of the stop 1441b engages with the notch 42b, and the guide lever and the eve 40 turn and straighten.
Located at tm. Therefore, the front end of the workpiece 4b in the guide pie f4o faces the workpiece tip discriminator 24, and the rear end faces the workpiece pressing rod 25.

Here, when the workpiece pressing kerod 25t is made to protrude into the guide pipe 40 by the air cylinder 26, the front end of the workpiece 4b is pressed against the workpiece tip discriminating part 24.

At this time, since the through hole 28m of the gripper 28 is formed to have a larger diameter than the chamfered portion 16 of the workpiece 4b and a smaller diameter than the workpiece 4b, it is assumed that the chamfered portion 16 is located at the front end of the workpiece 4b. When pressing the workpiece, the chamfered portion 16 is inserted into the through hole 2Bm due to the force of the rod 25. Therefore, the detector 3o retracts against the restoring force of the compression spring 29 and the switch 31 is turned on, so that it is determined that the front end of the workpiece 4b is the chamfered portion 16, that is, the tip. When the tip of the workpiece 4b is determined, the rod 25 is retracted to press the workpiece by the air cylinder 26, and the rotary cylinder 39
As a result, the rotating shaft 38 rotates clockwise. When the guide pipe 40 is positioned on the straight line t3, the tip of the workpiece 4b inside the guide pipe 40 faces the workpiece unloading section 32. Here, the conveying cylinder 36 is activated and the piston 37
When the transport rod 34 is pulled in, the guide pipe 40
The workpiece 4b protruding inward is carried out from the workpiece carrying-out section 32.

When the workpiece 4b is unloaded from the workpiece alignment mechanism 19 in this manner, the workpiece 4b is guided by the transport rod 34 because one guide pipe 67a faces the workpiece loading section 5 of the workpiece supply mechanism 20. It is inserted into Paizoro 7a.

When the insertion of the workpiece 4b is completed, the rotating shaft 62 is rotated 180° by the rotating cylinder 63, and the guide pipe 67a
is located in the upper stage, and the empty guide pipe 67b is located in the lower stage.

Therefore, the guide pie f67b faces the workpiece loading section 51.

Next, from the workpiece loading section 22 of the workpiece alignment mechanism 19,
When the actual workpiece 4b is carried in in the opposite direction, that is, with the chamfered portion 16 facing the rear end, the rear end surface of the workpiece 4b faces the workpiece front end determination section 24. Therefore, when the workpiece 4b is pressed by the rod 25, the rear end surface comes into contact with the front surface of the bushing 28, and the detector 30
is held in an advanced state by a compression spring 29. Therefore, the switch 31 is turned off, and it is determined that the workpiece 4b has been carried in from the rear end. In this way, when the switch 3 is in the OFF state, the rotating cylinder 3
9, the guide pipe 4o is rotated clockwise, and the chamfered portion 16 of the workpiece 4b, which was opposed to the rod 25 side when pressing the workpiece, is now opposed to the transport rod 34. Therefore, the direction of the workpiece 4b carried out from the workpiece carryout section 32 is opposite to that of the first workpiece, and the workpiece 4b is carried out from the rear end and inserted into the guide hole or the eve 67b in the same manner as described above. Therefore, the first and second works 4b and 4b inserted into the guide pipes 67a and 67b are aligned in one direction.

In addition, if the direction of the second workpiece 4b carried in from the workpiece carrying-in section 22 is the same as that of the first workpiece, if it is carried out from the workpiece carrying-out section 32 as it is, the guide piezoro 7a, 67b
When K is inserted, the directions are opposite to each other. However, if the second workpiece 4b is brought in with the same direction as the first workpiece, with the front end of the beveled edge portion 16, the workpiece tip discriminator 24 will determine that the second workpiece 4b is in the same direction. It is determined. Therefore, as shown in FIG. 8(B), the rotary shaft 38 is rotated counterclockwise by the output signal from the workpiece tip discriminating section 24. Therefore, the chamfered portion 16 of the workpiece 4b faces the transport rod 34, and the rear end faces the workpiece unloading section 32.

This is shown in a table as follows. In addition, ON・O
FF indicates the state of the switch 31, and clockwise and counterclockwise indicate the direction of rotation of the guide pipe 40.

In this way, the guide pipe 67 of the work supply mechanism 20
Work 4 b in the same direction as m, 67b.

4b is inserted, the guide pipes 7g and 67b are rotated 90 degrees clockwise by the rotating cylinder 63, and the guide pipes 67a and 67b 114 are removed from the work carrying out sections 52a and 5.
Opposite 2b. At this time, guide flat iso 67a, 6
Since 7b is vertical or tilted during rotation, the internal works 4b, 4b descend due to their own weight, and the works 4b, 4b
The end surface of the guide ring 50 comes into sliding contact with the inner circumferential surface of the guide ring 50. However, when the guide pin rollers 7h and 67b turn, the insertion hole 53*
, 53b is moved by the ring 59, and the insertion holes 53'th, 53b are connected to the guide ring 500.
It is retracted from the center in the width direction. Therefore, work 4b
, 4b rotate smoothly without being caught in the insertion holes 5, V & , 53b. Guide pipes 67a, 67b
When positioned vertically, the moving plate 58 is moved by the cylinder 59, and the insertion holes 53a and 53b are opposed to the lower ends of the guide holes 67a and 67b.

Therefore, the air cylinder 60 is used to push up the rod 6.
When 1,61 is protruded, the guide Paizoro 7m, 67b
The workpieces 4b and 4b inside are simultaneously carried out from the workpiece carry-out sections 52g and 52b, and these workpieces 4b and 4b are carried out at the same time. It is chucked by the cut chuck 68 and transported to the sudad tightening device.

By repeating such an action, the workpieces 4b... supplied from the first hopper 2 are directed in the direction of 10 degrees and two pieces are each fed into the mouth. can be supplied to the cut chuck 68.

Note that in the above embodiment, the long workpiece 4b
... has been described from the first hopper 2, but it may also be fed from the second hopper 3, or a short workpiece 4a may be fed from the parts feeder 1. Furthermore, the workpiece 4ai may be fed from the parts feeder 1, and the workpiece 4b may be fed from the first or second hooks 2 and 3, respectively.

Further, although the case of stud-built workpieces has been described, the present invention can also be applied to delts, bottles, rods, etc.

Note that the work supply device is composed of a work alignment mechanism 19 and a work supply mechanism 2θ, and the two workpieces are aligned and fed. However, when feeding the workpieces one by one, the workpiece The supply mechanism 20 becomes unnecessary. Tsumashi,
The workpiece may be carried out from the workpiece carrying IOB section 32 using the workpiece alignment mechanism I9 as a supply mechanism.

〔Effect of the invention〕

As explained above, according to the present invention, a workpiece unloading portion such as a sudado delt having directionality can be detected by the workpiece tip discrimination section, and based on the discrimination result, the workpiece can be fed with the turning direction aligned. This has the advantage that these operations can be performed automatically.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a front view of the entire structure, FIG. 2 is a plan view, and FIGS.
) is a front view of the workpiece, Fig. 4 is a longitudinal sectional front view of the workpiece supply device, Fig. 5 is a cross-sectional plan view, and Fig. 6 is the same as Fig.
FIG. 7 is a sectional view taken along the line W--■ in FIG. 4, and FIG. 8 (4) (B) is an explanatory view of the operation. 4&, 4b...Work, 21...Guide ring, 22
... Workpiece loading section, 24 ... Workpiece tip discrimination section, 2
5... Work pressing is done by rod, 32... Work unloading part,
40...Guide pipe, 39...Rotating cylinder (rotation drive mechanism), 34...Workpiece transfer rod. Applicant's agent Patent attorney Takehiko Suzue Figure 2 Figure 3" 4b lb +b M 7 Figure OFF

Claims (1)

[Claims] Discriminating the direction of a rod-shaped workpiece having a chamfered portion at the tip,
In an automatic workpiece supply device that aligns the direction of the workpieces and feeds them one by one, a guide ring, a workpiece loading section, a workpiece unloading section, and a workpiece tip discriminating section provided at different positions of the guide ring, and the same guide ring. The work transfer rod, which is provided in A rotary drive mechanism that rotates the blade and causes the open end of the guide knife to face the work loading section, the workpiece tip discriminating section, and the workpiece unloading section in this order.
fI: Characteristic automatic work supply device.