JPH0747146Y2 - Positioning stop device for die carrier - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a die carrier truck provided in a molding machine such as a press machine or an injection molding machine for replacing the die, and more specifically, the carrier truck. The present invention relates to a device for accurately positioning and stopping the machine at a predetermined position.

[Conventional technology]

Mold carrier vehicles that facilitate mold replacement in molding machines such as press machines are Japanese Patent Publication Nos. 55-48535 and 62-291.
No. 24, etc. The carrier is run on a rail and stopped in front of the molding machine, and the mold set in the molding machine is pulled out onto the carrier, and a new mold is moved from the carrier to the molding machine. However, in order to do so, the carrier must be able to accurately position and stop in front of the molding machine, and the above operation can be achieved if there is any deviation in the stop position. Not done.
However, even if the brake of a motor with a brake that drives the transport vehicle is operated to stop the transport vehicle, the inertia force of the transport vehicle varies greatly depending on whether or not a mold, which is a heavy object, is mounted. Stop position is not constant. Therefore, conventionally, a stopper pin whose tip is formed in a wedge shape is provided to be vertically moved by a cylinder, a stop block is fixed near the rail, and the stopper pin is lowered to lower the wedge of the stopper pin. A structure is adopted in which the end of the groove is fitted into the fitting hole of the stop block. However, in the past, the stopper pin was forcibly pushed into the fitting hole while the brake was applied.Therefore, the carriage may lift up from the rail due to the reaction force and the positioning may be stopped accurately. There was a risk that trouble would occur without being done.

[Purpose of device]

The present invention aims to solve the above-mentioned drawbacks of the prior art and to provide an apparatus capable of always accurately positioning and stopping a die carrier.

[Means for achieving the purpose]

In order to achieve the above object, the positioning stop device for a mold carrier according to the present invention has a V-shaped or U-shaped fitting hole formed at a required stop position of the mold carrier that travels along a rail. Fixing the stop block, the mold carrier is provided with a traveling motor, a traveling brake, and a stopper pin projecting toward the stop block by the operation of a cylinder, and the stopper pin is directed toward the stop block. In the positioning stop device for the die carrier carriage, the power supply to the traveling motor is stopped and the traveling braking brake is operated to stop the die carrier carriage at a required stop position. A limit switch is provided for detecting the fitting of the stopper pin into the fitting hole, and the operation of the limit switch temporarily releases the operation of the brake to transfer the mold. It is obtained characterized by comprising providing a timer to temporarily free the back-and-forth movement of the car.

[Action]

By fitting the stopper pin into the fitting hole of the stop block while the brake is temporarily released, the carrier truck moves slightly along the rail due to the reaction force that the stopper pin receives from the inner surface of the fitting hole during fitting. Then stop the positioning accurately.

〔Example〕

 Next, an embodiment of the present invention will be described with reference to the drawings.

In the figure, 1 is a molding machine such as a press machine, 2 and 2 are rails laid in parallel so as to cross the front of the molding machine, 3 is a mold carrier truck that runs on the rails 2 and 2, and 4 is The carrier 3
The drive motor 5 is connected to the drive wheels 5 of the vehicle through the endless chain 6, and 7 is a brake thereof. A roller conveyor 9 for supporting the mold 8 and a guide frame 10 for preventing the mold 8 from falling off are provided on the upper surface of the transport carriage 3, and the mold 8 on the roller conveyor 9 is pushed or pulled to A chain drive mechanism (not shown) for inserting or withdrawing the mold 8 from the roller conveyor 9 into the molding machine 1 is provided. Reference numeral 11 denotes a wedge-shaped stopper pin provided on the carriage 3 so as to project downward by the operation of the cylinder 12, and LS2 is a limit switch for detecting the movement of the stopper pin. Also, LS
Reference numeral 1 denotes a limit switch for detecting a required stop position of the carriage 3 by suspending a detection end of the carriage 3 below the carriage 3. On the other hand, a V-shaped fitting hole is provided at the required stop position in front of the molding machine 1.
A square bar-shaped stop block 14 having an upper surface 13 is fixedly mounted, and a protrusion 15 for operating the LS1 is fixed near the stop block 14.

Next, the operation of this positioning stop device will be described with reference to the timing charts of FIGS. 2a to 2d and FIG. By driving the traveling motor 4, the carriage 3 travels along the rails 2, 2 in the direction indicated by the arrow in FIG. 2a. Then, as shown in FIG. 2b, when the LS1 comes into contact with the protrusion 15 and the LS1 is turned on, the cylinder 12
Is activated to lower the stopper pin 11. Then, the tip of the stopper pin 11 slides while pressing the flat upper surface of the stop block 14, and the carriage 3 continues its traveling. then
LS2 is still off. As shown in FIG. 2c, when the stopper pin 11 falls into the fitting hole 13 and the LS2 is turned on, the power supply to the traveling motor 4 is stopped and the brake 7 is activated at the same time. For this reason, the stopper pin 11 is fitted in the fitting hole 13
The dolly 3 stops in a state where the dolly 3 is incompletely fitted therein. At the same time, when the timer A starts counting and about one second elapses, the brake 7 is released. At the same time, timer B starts counting. Therefore, while the timer B is counting (for about 2 seconds), the bogie 3 can freely move back and forth, and the stopper pin 11 is fitted into the fitting hole 13 by the pressing operation of the cylinder 12.
When there is a front-back misalignment of the dolly 3 because it is pressed down, the dolly 3 is moved back and forth, and the stopper pin 11 is inserted into the fitting hole 13
Fully fit inside. When the timer B has finished counting, the brake 7 is activated again and the carriage 3 is immovably stopped at the correct position. That is, the carriage 3 can be stopped at a required stop position in front of the molding machine 1 without error, and the die 8 can be carried in and out of the molding machine 1 without any trouble.

In this embodiment, as shown in FIG. 2b, the stopper pin 11 is lowered by the operation of LS1 without stopping the carriage 3, but the driving motor 4 is stopped and the brake 7 is operated by the operation of LS1. Let the trolley 3 be a stopper pin
You may make it stop so that 11 may be right above the fitting hole 13, and then make the stopper pin 11 descend | fall, and also in that case, the stopper pin 11 is descended and made to fit in the fitting hole 13. After that, the brake 7 is temporarily released by the timer B to allow the bogie 3 to move back and forth, so that the stopper pin 11 can be securely fitted into the fitting hole 13 and can be accurately positioned. The shape of the stopper pin 11 and the fitting hole 13 may be U shape in addition to the illustrated V shape, and in short, it is preferable that the stopper pin 11 and the fitting hole 13 are stably positioned in the fitting hole 13 by the pressure of the stopper pin 11.

[Effect of device]

As described above, according to the present invention, by providing the means for temporarily releasing the brake when the stopper pin is fitted into the fitting hole in the stop block, the mold carrier is prevented from shifting to the predetermined stop position. Since it can be accurately stopped, the transfer of the mold from the transport carriage onto the molding machine or the like can be carried out without any trouble.

BRIEF DESCRIPTION OF THE DRAWINGS The drawings show an embodiment of a positioning stopping device for a mold carrier according to the present invention. FIG. 1 is a plan view, and FIGS.
FIG. 2d is a side view showing the operating state in order, and FIG. 3 is a timing chart. 2 ... Rail, 3 ... Bogie, 4 ... Traveling motor, 7 ...
… Brake, 11 …… Stopper pin, 12 …… Cylinder, 13
...... Mating hole, 14 ...... Stop block, 15 ...... Projection body, LS1,
LS2 …… Limit switch.

Claims (1)

[Scope of utility model registration request] 1. A stop block in which a V-shaped, U-shaped fitting hole is formed at a required stop position of a die carrier truck that travels along a rail, and the die carrier truck is used for traveling. A stopper pin that projects toward the stop block by the operation of the cylinder toward the motor, the traveling brake, and the stop block is provided, and the stopper pin is projected toward the stop block.
In the positioning stop device of the die carrier truck, which stops the die carrier vehicle at a required stop position by stopping the power supply to the traveling motor and operating the travel braking brake, the fitting hole of the stopper pin is used. Is provided with a limit switch for detecting the fitting to the die, and a timer is provided for temporarily releasing the operation of the brake by operating the limit switch to temporarily allow the mold carrier truck to freely move back and forth. A positioning stop device for a die carrier truck.