JPS6224330B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a positioning device for a holding member in a conveyance device that can be easily adapted to various plate-shaped objects of different sizes.

In the soldering process in the assembly process of plate-shaped parts, such as printed circuit boards (hereinafter simply referred to as boards), the boards are held from both sides by carriers placed on a chain conveyor arranged in parallel. The soldering surface of the board is brought into contact with the solder in the jet solder bath placed on the transfer path, and soldering is performed.

In the above, the carrier that holds the substrate includes a fixed holding member and a movable holding member that is movable with respect to the fixed holding member so that it can hold substrates of various sizes when the substrate is produced in a wide variety of small quantities. It is equipped with Each time the dimensions of the substrate change, the movable holding member is moved relative to the fixed holding member for adjustment. All such adjustment work is performed manually by the operator, resulting in extremely poor workability and is an obstacle to automation.

SUMMARY OF THE INVENTION An object of the present invention is to provide a positioning device for holding members in a conveying device that eliminates the drawbacks of the prior art described above and automatically adjusts the interval between holding members of a carrier according to changes in the size of a substrate. be.

In order to achieve the above object, in the present invention,
By locking the carrier in a predetermined position and supporting the movable holding member of the carrier, and releasing the fastening of the movable holding member, moving the movable holding member to the required position and fastening it, the fixed holding member and A feature is that the distance between the movable holding member and the movable holding member can be arbitrarily adjusted.

An embodiment of the present invention will be described below with reference to the drawings.

1 and 2 show one embodiment of the present invention, FIG. 1 being a side cross-sectional view, and FIG. 2 being a cross-sectional view taken from FIG. 1. In the figure, a carrier 3 that holds and conveys a substrate 1 is placed on a chain conveyor (hereinafter simply referred to as chain) 2. As shown in FIG. The carrier 3 moves as the chain 2 runs, but when the carrier 3 comes into contact with a stopper or the like, the carrier 3 remains stationary even though the chain 2 runs. The carrier 3 includes a pair of shafts 4 arranged parallel to each other at a predetermined interval, a finger 6 projecting downward from a block 5 fixed to the shafts 4, and a collar 7 slidably fitted to the shafts 4. A finger 9 protrudes below the block 8 and is screwed onto the block 8 to face the finger 6.
A screw 10 passes through the collar 7 and presses against the shaft 4 to fasten the block 8 to the shaft 4. Therefore,
When the screw 10 is loosened, the block 8 can be slid against the shaft 4. Also,
The substrate 1 is held between the fingers 6 and 9. A transporting block 11 is mounted on the shaft 4 so as to face the block 5 with the block 8 in between.
is fixed. Then, block 5 and block 11 are each placed on chain 2. Blocks 12 and 13 are arranged in a part of the traveling path of the chain 2 so as to face each other with the chain 2 in between, and by supporting the chain 2, the path of the carrier 3 is kept at a constant height. There is. A cylinder 14 is fixed to the block 12,
A stopper 15 is attached to the rod.
The shaft 4 of the carrier 3 is fixed so as to face the path of the shaft 4 conveyed by the carrier 3. The stopper 15
A hole 16 is formed in which the shaft 4 fits. Therefore, the shaft 4 of the carrier 3 is the stopper 1.
5, when the cylinder 14 is actuated and the stopper 15 is pushed out, the hole 16 of the stopper 15 is opened.
is fitted with the shaft 4 to stop the carrier 3. A servo motor (hereinafter simply referred to as a motor) 18 is supported by a bearing 17 fixed to the upper end of the block 12, and a feed screw 19 connected to the rotating shaft of the servo motor 18 is connected to the bearing 17 and the upper end of the block 13. It is rotatably supported between a fixed bearing 20. A pair of guide bars 21 (see FIG. 2) are fixed between the bearings 17 and 20 with the feed screw 19 in between. A screw hole that is screwed into the feed screw 19 and the guide bar 21
A moving block 22, which has a hole that is slidably fitted in the guide bar 21, is slidably supported by the guide bar 21.
In addition, the guide bar 21 is rotated by the rotation of the feed screw 19.
slide along. The moving block 22 includes:
Three brackets 23 are fixed in a row.
Further, three bushes 24 corresponding to each bracket 23 are press-fitted and fixed to the moving block 22. A cylinder 25 is supported by the central bracket among the brackets. A shaft 26 that slidably passes through the bush 24 is coupled to the rod of the cylinder 25, and a clamper 27 having a groove in which the block 8 fits is fixed to the lower end of the shaft 26. Said bracket 2
Cylinder 28, which is a combination of a linear cylinder and a rotary cylinder, is supported by brackets at both ends of cylinder 3. A shaft 29 is coupled to the rod of the cylinder 28 and extends through the bush 24 in a slidable and rotatable manner, and a finger 30 is formed at the lower end of the shaft 29 with a groove that fits into the head of the screw 10. is fixed. A detector 32 is supported on a bracket 31 fixed to the lower surface of the moving block 22 so that its contact 33 faces the block 8. A rotary encoder 34 is attached to the motor 18 so that rotation of the motor 18 can be detected. The control means 35 is connected to the detector 32 and the rotary encoder 34, and is configured to give a rotation command to the motor 18.

In the above configuration, when the carrier 3 is sent between the blocks 12 and 13 as the chain 2 travels, and the shaft 4 comes to a position facing the stopper 15, the cylinder 14 is actuated to push out the stopper 15 and open the hole. 16 is fitted with the shaft 4, and the carrier 3 is stopped. Then, the motor 18 operates and the feed screw 1
9 is rotated, and the moving block 22 is moved until the contact 33 of the detector 32 comes into contact with the block 8 and the detector 32 is activated. At this time, a pulse corresponding to the amount of rotation of the motor 18 is generated from the rotary encoder 34, and the position of the moving block 22 is detected by the control means 35. When block 8 is detected by detector 32, motor 18 is stopped. Then, the cylinder 25 is activated to lower the clamper 27 and fit the clamper 27 into the block 8. Then, the direct-acting part of the cylinder 28 is activated to lower the finger 30 and move the finger 30 down.
After fitting the head of the screw 10, the cylinder 2
The rotating part 8 operates to rotate the finger 30 and unscrew the screw 10. On the other hand, the control means 35
Now, the position of the block 8 detected by the detector 32 is compared with the newly set position of the block 8, and the rotation direction and rotation amount of the motor 18 are calculated.
Then, when the screw 10 is loosened, the control means 35
A command based on the calculation result is applied to the motor 18, the motor 18 rotates, and the moving block 22
slide. Then, the block 8 connected to the moving block 22 by the clamper 27 also slides together with the moving block 22, and the interval between the fingers 6 and 9 is changed. When the motor 18 rotates by the amount commanded by the control means 35, the motor 18 stops and the moving block 22 also stops. Then, the rotating part of the cylinder 28 operates to rotate the finger 30 and tighten the screw 10. In this state, the linear motion part of the cylinder 28 is operated to remove the finger 30 from the head of the screw 10, and then the rotation part of the cylinder 28 is operated to return the rotation of the finger 30, and the linear motion part of the cylinder 28 is moved again. The finger 30 is fitted into the head of the screw 10 by the operation of the rotating part, and the finger 30 is fitted into the head of the screw 10 by the operation of the rotating part again.
Eliminate looseness. Next, the cylinder 25 and the linear moving parts of the cylinder 28 are activated to pull up the clamper 27 and the finger 30, and then the motor 18 is activated to move the moving block 22 to the standby position, and the cylinder 14 is activated to raise the stopper. 15 is moved backward and separated from the shaft 4. Then,
Carrier 3 is carried by chain 2.

As described above, according to the present invention, the locking means is arranged to face the side surface of the carrier travel path and stops the carrier at a predetermined position, and the movable holding member of the locked carrier is moved to a predetermined position. Since a moving means for moving and fixing the conveyed object is provided, it is possible to easily adapt to changes in the size of the conveyed object.
Further, there are effects such as being able to easily realize automation of a processing device using a conveyance device.

[Brief explanation of the drawing]

FIG. 1 is a side cross-sectional view of a positioning device according to the present invention, and FIG. 2 is a cross-sectional view taken along the line of FIG. 1... Board (object to be transported), 3... Carrier, 4, 4
... Shaft, 5... Block (fixed holding member), 6... Finger, 8... Block (movable holding member), 9... Finger, 10... Screw [locking means], 14... Cylinder, 15... Stopper, 16... Hole, [Moving means] (sliding member), 22... moving block (coupling member), 25
...Cylinder, 27...Clamper (operation member), 28
...Cylinder, 30...Finger [positioning means],
18...Motor, 19...Feed screw, 34...Rotary encoder, 35...Control means.

Claims (1)

[Claims] 1. By a carrier comprising a fixed holding member coupled to a pair of shafts extending in the width direction of the carrier, and a movable holding member facing the fixed holding member and sliding and fastened to the pair of shafts, This is a positioning device for a holding member in a conveying device that holds and conveys the side surface of a plate-shaped object to be conveyed, and is arranged so as to face the side surface of the carrier's travel path, and the device engages the stopper with the carrier to move the carrier. It is supported by a locking means for locking at a predetermined position and a sliding member disposed so as to be slidable in the width direction of the carrier so as to face the movable holding member of the locked carrier, and is slidable with the movable holding member. A moving means includes a coupling member for coupling the movable member to the movable holding member, and an operation member for coupling and releasing the shaft and the movable holding member; What is claimed is: 1. A positioning device for a holding member in a conveyance device, characterized in that a positioning means for moving and positioning the holding member in the width direction is provided.