JPH05254650A - Double row type transporting device - Google Patents

Abstract

PURPOSE:To prevent the secondary reduction of operation rate due to the drop- off fault of works and improve reliability in transport by detecting the drop-off of the works on a transport rail and automatically carrying out the supply and discharge of the works. CONSTITUTION:As for a plural row transporting device, if a work detecting sensor 3a or 3b detects the existence of a work 2a or 2b at a prescribed position in the row, a belt conveyor 5a or 5b is driven by the detection signal. A prescribed work 2a or 2b is supplied on a transport rail 1a or 1b, or the prescribed work 2a or 2b is discharged on the transport rail 1a or 1b, and a pair of works 2a and 2b are arranged on the transport rails 1a and 1b in double rows. Accordingly, supply and discharge for the drop-off of the work 2a or 2b can be automatically carried out in a system tact, and the secondary reduction of the operation rate due to the drop-off article can be prevented, and the reliability in transport as a perfect synchronous transport system can be improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double-row conveying device which is provided in an automatic assembly line or the like and conveys a plurality of kinds of works, and more particularly to a double-row conveying device which can efficiently correct missing teeth of the works. ..

[0002]

2. Description of the Related Art In a conventional two-row perfect synchronous transfer apparatus, there is a defective work on a transfer rail as a work transfer means of one row, and when this work is discharged, it is transferred on the transfer rail of the other row. The work that is paired with the above-mentioned defective work was also discharged.

Alternatively, each row is driven by a separate drive source so that the row on which the non-defective work is placed is temporarily placed on standby and paired with the next non-defective work on the opposite row. ..

Alternatively, one of the two rows of work transfer means is used for synchronous transfer on the transfer rail, the other is used for belt transfer, and a buffer is provided for asynchronous transfer.

[0005]

However, the above-mentioned 2
The first method of the row transfer device has a problem that the work rate and the product yield are reduced because the non-defective work paired with the defective product is also discharged.

Further, the second method has the drawbacks that the operating rate of the row on the waiting side is reduced, and since the two rows are driven by separate drive sources, the mechanism is complicated and the operation reliability is also reduced.

Further, since the third method is non-simultaneous conveyance, the reliability of the conveyance is lowered and the work may be damaged.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a double-row conveying device capable of improving the operating rate of the system and the reliability of conveyance.

[0009]

According to a first aspect of the present invention, there is provided a double-row conveying device in which a plurality of rows of conveying rails 1 are provided in parallel as work conveying means. Work detection sensor 3 as work detection means for detecting the presence or absence of work 2 at a predetermined position on 1.
And a downstream side of the work detection sensor 3 of the transport rail 1, respectively, and serves as work missing tooth correction means for replenishing or discharging the predetermined work 2 with respect to the transport rail 1 according to a signal detected by the work detection sensor 3. A belt conveyor 5 is provided.

According to a second aspect of the present invention, in the double-row conveying device, a shutter 7 and a side plate 8 as a locking means for opening and closing by a signal detected by the work detection sensor 3 are provided at a connecting portion between the conveying rail 1 and the belt conveyor 5. It is characterized by being provided.

[0011]

In the double-row transport device according to the first aspect, when the work detection sensor 3 detects the presence or absence of the work 2 at a predetermined position in the row, the belt conveyor 5 is driven by the detection signal and the transport rail 1 The pair of works 2 can be aligned on the double-row transport rails 1 by replenishing the predetermined work 2 on the transport rail 1 or by discharging the predetermined work 2 on the transport rail 1.

In the double-row transfer device according to the second aspect, the shutter 2 is closed and the side plate 8 is lowered to smoothly transfer the work 2 on the transfer rail 1.
Further, by raising the shutter 7 and raising the side plate 8, it is possible to smoothly transfer the work 2 between the belt conveyor 5 and the transport rail 1.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the double-row conveying device of the present invention will be described below with reference to the drawings.

1 to 4 show the configuration of this embodiment. In FIG. 1, the first work 2a and the second work 2a are respectively placed on the two rows of the transport rails 1a and 1b arranged in parallel and close to each other.
And the workpiece 2b are conveyed at a constant interval. Work detection sensors (hereinafter simply referred to as sensors) 3a and 3b for detecting the presence or absence of the works 2a and 2b are provided at predetermined positions of the first transfer rail 1a and the second transfer rail 1b, respectively. Further, the sensor 3a is provided on the first transport rail 1a.
A first defective work discharge path 4a for discharging defective work is provided at a position of two first works 2a upstream from the first work 2a facing each other. Similarly, on the second transport rail 1b, a second defective work discharge path 4b for discharging a defective work at a position of the second work 2b, which is one upstream side from the second work 2b facing the sensor 3b.
Is provided.

The first work 2 on the downstream side of the first work 2a facing the sensor 3a of the first transport rail 1a.
At the position of "a", the first position is perpendicular to the outside of the transport rail 1a.
The first belt conveyor 5a is connected as the work missing tooth correcting means. Similarly, at the position of the second work 2b two downstream from the second work 2b facing the sensor 3b of the second transport rail 1b, a second belt conveyor 5b is formed outside the transport rail 1b at a right angle. Are connected. Further, the belt conveyors 5a and 5b are provided with a first stop switch 6a and a second stop switch 6b, respectively. Further, shutters 7a and 7b, side plates 8a and 8b, and sensors 9a and 9b, which will be described later, are provided at respective connecting portions between the transport rails 1a and 1b and the belt conveyors 5a and 5b.

FIG. 2 shows a detailed structure of the transport rail 1 and the belt conveyor 5. A drive shaft 11 is provided in close proximity to and parallel to the transport rail 1 so as to be capable of reciprocating a constant stroke in the direction of arrow AA and rotatable in a certain angle range in the direction of arrow BB. The drive shaft 11 is moved and rotated by a drive source (not shown). Further drive shaft 1
1, a base end of a work transfer pawl 12 in a right angle direction is fixed at a pitch equal to the pitch of the work 2 placed on the transfer rail 1.
It can be inserted between. And the work transfer claw 12
The drive shaft 11 is moved in the traveling direction by one pitch in a state where the drive shaft 11 is inserted between the works 2, and then the work transfer claw 12 is separated from the space between the works 2, and the drive shaft 11 is retracted to the original position and again between the works 2. To insert. By repeating this movement, the work 2 is transported.

A work storage unit 13 is provided below the belt conveyor 5 in parallel with the belt conveyor 5, and a belt 14 of the belt conveyor 5 has work conveying pawls 15 at a pitch equal to the width of the work 2 and a belt 14. Are provided in the width direction. The work transfer claw 15 is the work storage unit 1.
It is inserted between the works 2 placed on the surface 3. The belt 14 is an endless belt, and both ends thereof are rotatably supported by rollers 16 and 17.

The roller 16 on the side opposite to the transport rail 1
A pulley 18 is attached to one end of the pulley 18, and power on the driving side is transmitted through a timing belt 19 attached to the pulley 18. As shown in FIG. 3, rotation of the drive shaft 21 on the driving side is controlled by a pulley 23 via an index unit 22.
The timing belt 19 is attached to the pulley 23. The drive shaft 21 has a first gear 24 and a first gear 24.
Clutch 25, second gear 26 and electromagnetic brake 27
Is provided, and the reverse rotation drive shaft 28 is provided parallel to the drive shaft 21.
Is provided. The reverse drive shaft 28 has a third gear 2
9, a second clutch 30 and a fourth gear 31 are provided, the third gear 29 is directly meshed with the first gear 24, and the fourth gear 31 is connected to the fifth gear 32 via a fifth gear 32. It meshes with the second gear 26. Then, the first clutch 25 is turned on and the second clutch 30 is turned off, so that the forward rotation is performed.
The first clutch 25 is disengaged and the second clutch 30 is engaged so that the reverse rotation is performed.

FIG. 4 shows the arrangement of the shutter 7 and the side plate 8 as the locking means. The shutter 7 is provided parallel to the side surface of the side surface of the transfer rail 1 to which the belt conveyor 5 is connected, and the side plate 8 is located at the position where the belt conveyor 5 of the transfer rail 1 is connected and in the transfer direction of the work 2. One pair is provided on the left and right at an interval equal to the length. And shutter 7
The side plate 8 and the side plate 8 are driven up and down by a driving means (not shown) in response to signals emitted from the sensors 3 and 9.

Next, the operation of this embodiment will be described with reference to the flow charts shown in FIGS. Step 10 shown in FIG.
If the sensor 3a provided in the first transport path 1a detects the work 2a in 1 and the sensor 3b provided in the second transport path 1b detects the work 2b in step 1, it is normal in step 103. Both transport paths 1
Work transfer pawls 12a and 12b provided on a and 1b are respectively inserted between the works 2a and 2b, and the drive shaft 11 is moved one pitch in the transfer direction to transfer the works 2a and 2b. At this time, the shutters 7a, 7b are raised and the side plates 8a, 8b are
b is descending. When the work pieces 2a and 2b have been conveyed by one pitch, at step 104, the work piece feeding claws 12
a and 12b are retracted from between the works 2a and 2b, respectively, the drive shaft 11 is moved by one pitch in the direction opposite to the carrying direction, and the process returns to step 101.

If the sensor 3b does not detect the work 2b in step 102 and the sensor 9b detects the work 2b on the second belt conveyor 5b in step 105, the drive shaft is moved in the same manner as in step 103 in step 106. 11 is moved in the conveying direction by 2 pitches, and the part where the work 2b is missing is conveyed by the belt conveyor 5b.
Face the position. Then in step 107, the second
The shutter 7b is lowered and the side plate 8b is raised, and in step 108, the second stop switch 6b is turned off to move the belt conveyor 5b one pitch in the direction of the transport rail 1b. As a result, in step 109, the work 2b can be replenished to the portion where the work 2b is missing on the second transport rail 1b.

When the sensor 9b does not detect the work 2b in step 105, the drive shaft 11 is moved one pitch in the carrying direction in the same manner as the operation in step 103 in step 110, and the part where the work 2b is missing is paired. The first work piece 2a is formed into a first belt conveyor 5a.
Face the position. Next, in step 111, the first
Lower the shutter 7a and raise the first side plate 8a,
In step 112, the first stop switch 6a is turned off.
As F, the belt conveyor 5a is moved one pitch in the direction away from the transport rail 1a. As a result, step 11
In 3, it is possible to discharge the first work 2a that forms a pair with the part where the work 2b is missing.

In step 101, the sensor 3a provided in the first transport path 1a does not detect the work 2a, and in step 201 shown in FIG. 6, the sensor 3b provided in the second transport path 1b detects the work 2b. If yes, step 2
If the sensor 9a is ON in 02, step 20
In 3, the drive shaft 11 is moved by one pitch in the transport direction. Next, in step 204, the first shutter 7a is lowered and the side plate 8a is raised. In step 205, the first stop switch 6a is turned off to move the belt conveyor 5a by one pitch in the direction of the transport rail 1a, and in step 206, the workpiece is moved. 2a is replenished.

In step 202, the sensor 9a turns off.
If it is F, in step 207 the drive shaft 11 is moved by 2 pitches in the carrying direction, and in step 208 the second
The shutter 7b is lowered and the second side plate 8b is raised. Next, in step 209, the second stop switch 6
With b turned off, the belt conveyor 5b is moved to the transport rail 1b.
Move one pitch away from. As a result, in step 210, it is possible to carry out the second work 2b forming a pair with the part where the work 2b is missing.

In step 201, the sensor 3b turns off.
F, and the work 2 is placed on each of the transport paths 1a and 1b.
If a and 2b do not exist, and if the sensors 9a and 9b are both ON in step 301, the workpieces 2a and 2b are replenished in step 302 as in the above-described operation. If at least one of the sensors 9a and 9b is OFF in step 301, the drive shaft 11 is moved as it is by one pitch in the carrying direction in step 303.

The above steps 109, 113, 206,
After 210, 302, and 303 are completed, the process returns to step 101, and the same operation is repeated. However, if the work transfer claws 12 are inserted between the works 2 when the above steps are completed, the operation of inserting the work transfer claws 12 in step 103 becomes unnecessary. When the defective reproduction product of the work 2 is manually re-loaded into the work storage unit 13, the stop switch 6 on the loading side is turned on and then the stop switch 6 is turned off.

According to the present embodiment, it is possible to automatically perform replenishment and discharge for missing teeth of the work 2 in the system tact, and to reduce secondary operation rate due to missing work missing parts. Can be prevented. Moreover, since it is a completely synchronous transport system, it is possible to improve the reliability of transport,
It is possible to prevent the work 2 from being damaged. Further, it is possible to re-input the work 2 on the way.

In the above embodiment, the case where the replenishment and the discharge of the work 2 are performed by the belt conveyor 5 installed in the horizontal direction has been described, but other mechanisms such as a lift elevator may be used. Further, the present invention can be applied to the case where the synchronous transport rail 1 is used on one side of the two rows of transport paths and the belt conveyor is used on the other side, and the same effect can be obtained. In this case, the belt conveyor 5 as the missing tooth correcting means is provided only on the side of the transport rail 5. The number of rows of the work transfer path is not limited to two and may be three or more.

[0029]

As described above, according to the double-row transfer device of the first aspect, the missing work of the work on the transfer rail is detected and the work is automatically replenished or discharged. Therefore, it is possible to prevent a secondary decrease in the operating rate due to a missing piece of the workpiece and improve the reliability of conveyance. Moreover, it is possible to prevent the work from being damaged and to re-insert the work during the process.

Further, according to the double-row transfer device of the second aspect, the shutter serving as the locking means is raised during the transfer of the work, so that the transfer of the work can be smoothly guided. Further, at the time of replenishing the work, the side plate can be raised to guide the replenished work to the correct position, and it is possible to prevent interference with the work conveying claw.

[Brief description of drawings]

FIG. 1 is a plan view showing the configuration of an embodiment of a double-row transport device of the present invention.

FIG. 2 is a perspective view showing a configuration of a main part of FIG.

FIG. 3 is an explanatory view showing a drive mechanism of the belt conveyor of FIG.

FIG. 4 is a perspective view showing a configuration of a shutter and a side plate of FIG.

FIG. 5 is a first flowchart illustrating the operation of this embodiment.

FIG. 6 is a second flowchart illustrating the operation of this embodiment.

[Explanation of symbols]

 1 Transport Rail (Work Transporting Means) 2 Work 3 Sensor (Work Detecting Means) 5 Belt Conveyor (Work Tooth Missing Correction Means) 7 Shutter (Locking Means) 8 Side Plate (Locking Means)

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location B65G 47/82 D 8010-3F

Claims (2)

[Claims] 1. A multi-row transfer device in which a plurality of rows of work transfer means are provided in parallel, and a work detection means for detecting the presence or absence of a work at a predetermined position on the work transfer means of each row, and the work. And a workpiece tooth missing correction unit that is connected downstream of the workpiece detection unit of the transport unit and that replenishes or discharges a predetermined workpiece with respect to the workpiece transport unit according to a signal detected by the workpiece detection unit. A double-row transport device characterized by. 2. The double-row transfer device according to claim 1, wherein a locking means which opens and closes according to a signal detected by the work detection means is provided at a connecting portion between the work transfer means and the work tooth missing correction means. ..