JPH0313464Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a pallet positioning and stopping device on a conveyor line, and in particular,
This invention relates to a pallet positioning and stopping device for a conveyor line in which the pallet is stopped at a predetermined position on the transfer line by a stop mechanism, and is simultaneously pushed up by a push-up mechanism and accurately positioned in the running direction.

[Problems to be solved by conventional techniques and inventions] Conventionally, devices generally used to stop and hold only pallets on a conveyor that are continuously moving have two left and right pallets. Since the structure is such that a lifting device located between the conveyors is operated to lift and grip the pallet, not only is accurate positioning of the lifting device and the traveling direction not possible, but the lifting device was large and costly.

Further, as a pallet positioning and stopping device, one described in Japanese Patent Application Laid-Open No. 55-5283 is known. This publication discloses a pallet positioning device having a push-up mechanism. In addition, as a positioning device for transfer machines, JP-A-47-
The one described in Publication No. 19478 is known. That is,
In particular, it has a mechanism for pushing up the station table by fitting a taper knock pin into a hole. However, the latter has a drawback in its lifting mechanism using a knock pin, and the former has a lifting mechanism and a positioning mechanism that are separate mechanisms, resulting in an extremely large size and high cost.

Therefore, in view of these deficiencies, the present invention aims to eliminate them.

[Means for solving the problem] This invention was proposed in order to achieve the above object, and the upper stand 2 and the lower stand 3 of the mount 1
A conveyor 8 is formed by installing chains 6, 7 on rails 4, 4, 5, 5 provided in A workpiece 11 is mounted using a jig 10, and a stationary block 13 and a mounting block 14 are mounted on the upper table 2 near the installation position of the processing head 12 provided on the upper surface of the conveyor 8. Further, the mounting block 14 is provided with a sensor 15 for detecting the transfer of the pallet 9 or the workpiece 11, and the piston 16 is actuated by the command from the control section upon sensing by the sensor 15. A stop mechanism 17 that makes a protruding motion toward the pallet 9
and a push-up mechanism 19 for causing the push-up piston 18 to project toward the pallet 9 almost simultaneously with or slightly behind the projecting action of the piston 16 in accordance with the above-mentioned operation of the sensor 15; 9 is provided with a locking portion 20 that is locked by the piston 16 of the stop mechanism 17, and is provided with internal squeeze-like sloped portions 9a, 9b on the lower surface of both ends, and further corresponds to the sloped portions 9a, 9b. Slanted portion 13
a, 18a are provided on the stationary block 13 and the lifting piston 18 of the lifting mechanism 19, respectively, and the stationary block 13 is provided with a holding part 21 on the opposite side of the lifting mechanism 19 for regulating the amount of lifting of the pallet 9.
In a pallet positioning device, a V-shaped positioning part 9c is provided at the upper center of one side of the pallet 9, and the V-shaped positioning part can be positioned by fitting into the positioning part 9c. 18b is provided above the tip of the push-up piston 18, and an inclined portion 9 on one side of the pallet 9 is provided below the push-up piston 18.
Inclined portion 18 of the push-up piston 18 corresponding to b
It is an object of the present invention to provide a pallet positioning and stopping device in a conveyor line, which is characterized by being provided with a pallet positioning and stopping device.

[Function] When the pallet 9 comes to a predetermined position while traveling, the piston 16 protrudes due to the operation of the stop mechanism 17 and the pallet 9
When the push-up piston 18 is stopped by being locked in the locking portion 20 of the push-up mechanism 19, the push-up piston 18 projects. This push-up piston 18 is provided with an inclined portion 18a at the lower part of its tip, and supports the inclined portion 9b provided at the lower part of one side of the pallet 9 from the lower surface, and the thrust of the push-up piston 18 pushes the pallet. 9
lift upwards. Furthermore, a V-shaped positioning part 18b is provided at the upper part of the push-up piston 18, and a V-shaped positioning part 9c is provided at the center of the side surface of the pallet 9, corresponding to the V-shaped positioning part 18b. is provided, so that when the protruding operation of the push-up piston 18 stops, the pallet 9 is adjusted and held at an accurate position in the traveling direction.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the attached drawings. For convenience of explanation, conventionally known technical matters will also be explained at the same time. Figure 1 shows a side view, Figure 2 shows a side view.
As shown in plan view in the figure, rails 4 and 4 are mounted on the upper and lower bases 2 and 3 of the frame 1, which is long on the left and right sides of FIG.
and 5, 5, and the endless chains 6, 7 are placed along the rails 4, 5, 4, 5. Using a motor and sprocket wheels (not shown), the chain 6 in FIG. , 7 is formed into a conveyor 8 which rotates continuously in the direction from the back surface to the front surface in FIG. 1 and in the direction of the arrow in FIG. 2, for example. A workpiece 11 is attached to the pallet 9 to be placed on the conveyor 8 using a mounting jig 10. A stationary block 13 and a mounting block 14 are attached to the stand 2 on the left and right sides of FIG. 15, a stop mechanism 17 that causes the piston 16 to protrude toward the pallet 9 in response to a command from the control unit in accordance with the above operation of the sensor 15; Almost simultaneously with the operation, or slightly later than this, the push-up piston 18 moves to the pallet 9.
A push-up mechanism 19 that protrudes toward is attached to each.

The pallet 9 is provided with a locking part 20, and the lower left and right sides of the pallet 9 are provided with inclined parts 9a and 9a as shown in FIG.
9b, and sloped portions 1 are provided at the inner upper part of the stationary block 13 and at the lower part of the tip of the push-up piston 18, respectively.
3a and 18a, and a holding part 21 is provided on the upper surface of the stationary block 13. Also, as shown in FIG. V in the upper part
A letter-shaped positioning portion 18b is provided respectively. Then, the sensing operation of the sensor 15 causes the piston 16 to protrude forward in the advancing direction of the locking part 20 of the pallet 9, so the locking part 20 comes into contact with the piston 16 and the pallet 9 stops. Then, while the push-up piston 18 protrudes and its positioning portion 18b gradually engages with the positioning portion 9c of the pallet 9, the push-up piston 18 advances forward. At this time, the pallet 9 is pushed toward the stationary block 13 by the push-up piston 18, so the push-up piston 18
The inclined part 18a of the stationary block 13 and the inclined part 13a of the stationary block 13 come into contact with the inclined parts 9b and 9a of the pallet 9, respectively, and the pallet 9 is pushed up by the mutual sliding action of these inclined parts. Then, the pallet 9 is separated from the conveyors 8, 8, and the upper surface of the pallet 9 is placed on the stationary block 13.
The pallet 9 is held in a state in which it is in contact with the holding portion 21 of the piston 16 and the lower surface of the piston 16. In this holding state, the pallet 9 is accurately positioned at a predetermined position in the traveling direction by fitting the V-shaped positioning portions 18b and 9c. Thus, in this holding state, the pallet 9 and the workpieces 11 attached thereto are at predetermined positions relative to the processing head 12 in the front, rear, left, right, and top and bottom directions. When the predetermined machining operation is completed, the stop mechanism 1 is
Since both the piston 16 of No. 7 and the push-up piston 18 of the push-up mechanism 19 move backward, the above-mentioned holding state is released, and the pallet 9 rides on the conveyors 8, 8 and is again transferred in the direction of the arrow.

[Effects of the invention] Since the pallet positioning and stopping device in a conveyor line according to this invention is configured as described above, the piston 16 of the stopping mechanism 17 is moved to the pallet by the sensing operation of the sensor 15, as in the conventional case. 9
Also, the push-up piston 1 of the push-up mechanism 19
When the positioning portion 18b positions the pallet 9 by the protruding operation of the push-up piston 1
The pallet 9 is supported by the lower surface of the pallet 9 and pushed up and away from the conveyor 8 by the cooperation of the inclined part 18a provided at the lower end of the conveyor 8 and the inclined part 13a of the stationary block 13. At this time, the pallet 9 is moved in the traveling direction by the engagement operation between the V-shaped positioning part 9c provided in the center of the upper part of one side of the pallet 9 and the positioning part 18b provided in the upper part of the tip of the push-up piston 18. It is precisely and stillly positioned at a predetermined location. In this way, the present invention allows the pallet 9 to be lifted with its lower surface supported by a simple mechanism and operation, so that it is reliably separated from the conveyor and the positioning and stopping operation of the pallet is performed accurately. , and can also contribute to cost reduction.

[Brief explanation of the drawing]

The figure shows one embodiment of this invention.
The figure is a partially cutaway side view of the device, and FIG. 2 is a plan view thereof. 8... Conveyor, 9... Pallet, 9a, 9
b, 13a, 18a...slope portion, 9c, 18b...
...Positioning part, 13...Stationary block, 15...
Sensor, 16... Piston, 17... Stop mechanism,
18... Push-up piston, 19... Push-up mechanism, 21
...presser foot.

Claims (1)

[Scope of utility model registration request] Chains 6 and 7 are installed on rails 4, 4, 5, and 5 provided on the upper and lower stands 2 and 3 of the gantry 1 to form a conveyor 8, and the conveyor 8 is formed so that pallets 9 can be placed thereon. Furthermore, a workpiece 11 is attached to the pallet 9 using a mounting jig 10, and the upper table is installed near the installation position of the processing head 12 provided on the upper surface of the conveyor 8. 2 is provided with a stationary block 13 and a mounting block 14 facing each other, and furthermore, the mounting block 14 is provided with a sensor 15 for sensing the transfer of the pallet 9 or the workpiece 11; , a stop mechanism 17 that causes the piston 16 to project toward the pallet 9 in response to a command from the control section; and a stop mechanism 17 that causes the piston 16 to project toward the pallet 9 in response to the command from the control section; A push-up mechanism 19 is provided in which the push-up piston 18 projects toward the pallet 9. Furthermore, the pallet 9 is provided with a locking portion 20 that is locked by the piston 16 of the stop mechanism 17, and a locking portion 20 is provided on the lower surface of both ends thereof. Inner squeeze-like inclined portions 9a and 9b are provided, and the inclined portion 9
The stationary block 13 and the lifting piston 18 of the lifting mechanism 19 are provided with inclined portions 13a and 18a corresponding to the positions 13a and 9b, respectively, and the stationary block 13 has a device on the side opposite to the lifting mechanism 19 that regulates the amount of lifting of the pallet 9. In the pallet positioning device, which is provided with a holding part 21 for holding the pallet, a V-shaped positioning part 9c is provided at the upper center of one side of the pallet 9, and the pallet 9 can be positioned by fitting into the positioning part 9c. A V-shaped positioning portion 18b is provided above the tip of the push-up piston 18, and an inclined portion 18a of the push-up piston 18 corresponding to the inclined portion 9b on one side of the pallet 9 is provided below the positioning portion 18b. Features: A pallet positioning and stopping device on a conveyor line.