JPH0681661B2 - Die casting machine product removal hand device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention has a center tuning function of a reversible chuck mechanism used for reliably taking out a cast product in a die casting machine and setting it in a press die. The present invention relates to a hand device configured to have.

[Prior Art] Conventionally, as a hand device of this type, for example,
No. 32355 is known.

That is, as shown in FIG. 5 to FIG. 6, the chuck mechanism 24 used as a product take-out hand device of a die casting machine is provided with a rotary actuator 26 having a built-in linear motion cylinder, and one end of this rotary actuator 26 is provided. Is a shaft that can be moved forward and backward, which is the piston rod of the linear motion cylinder, and the reversal shaft 30 projects at the other end.
A reversing plate 32 is attached to the reversing shaft 30.

Further, a pair of guide rods 34, 34 are arranged on the reversing plate 32 in parallel with the reversing shaft 30 of the actuator 26, and a pair of chuck plates 36, 38 are slidable on the guide rods 34, 34. Has been inserted into.

One of the chuck plates 36 is coupled to the shaft end of the direct acting cylinder protruding from one end of the rotary actuator 26, and the other chuck plate 38 is provided opposite to the reversing plate 32.

Further, the chuck plates 36, 38 are coupled to each other via a link mechanism 40, and the chuck plates 36, 38 are moved toward and away from the center of gripping the product by the axial movement of the linear motion cylinder. be able to.

In this case, compression coil springs 42, 42 are inserted between the reversing plate 32 and the chuck plate 38 provided opposite thereto, and the elastic force of the springs 42 elastically bias the pair of chuck plates 38. is doing.

[Problems to be Solved by the Invention] According to the chuck mechanism of the conventional hand device configured as described above, when one chuck plate 36 is moved in the closing direction by the single linear motion cylinder, the other chuck plate is moved. 38 also moves in the closing direction in synchronization via the link mechanism 40.

Therefore, the chucking force by the cylinder is halved, and the output efficiency is further promoted by the link efficiency and the sliding resistance of the guide rods 34, 34.In order to increase the output of the cylinder, the diameter of the cylinder must be increased. Or, it is necessary to increase the operating pressure of the cylinder, which makes the structure large and complicated, and requires an unnecessarily large power source, which is uneconomical. Furthermore, in the link part and the sliding part that constitute the chuck mechanism, Since the front chucking force acts on the part, periodic lubrication of the part is required as a measure to prevent accelerated wear due to long-term use.
There were some difficulties, such as time-consuming inspection.

Therefore, an object of the present invention is to provide a chuck actuator on a base plate supported in a reversible manner by a rotary actuator of a chuck mechanism, and to provide a pair of piston rods, which are independently and relatively moved relative to each other, to the actuator. A pair of chuck plates are respectively fastened to the tip of the piston rod so as to face each other, and a center tuning means for tuning and moving the pair of chuck plates with respect to the product gripping center is provided. It is an object of the present invention to provide a device for taking out products of a die casting machine, which is capable of improving chucking efficiency in a compact structure by attaching a chuck plate having a function of centering the output shaft by using a motor.

[Means for Solving the Problems] In order to achieve the above object, in the present invention, a product cast by a die casting machine can be taken out from a die surface and can be inverted by a rotary actuator so as to set it in a press die. In the product take-out hand device provided with a chuck mechanism, the chuck mechanism fixes a pair of side plates to the output shafts at both ends of the rotary actuator, and also fixes a base plate to the ends of the side plates at right angles to the end plates. A chuck actuator is provided, and this actuator is composed of a double-headed direct acting cylinder.The direct acting cylinder forms a pair of cylinders communicating with each other through small holes at both ends of the inside, and a piston rod is placed in these cylinders. Each of them is independently inserted and inserted so as to move back and forth relatively, De tip the pair of chucks plate configured to fastened to face respectively, characterized in that configured to include a center tuning means for tuning move the pair of chucking plates to product gripping center.

[Operation] In the product take-out device of the die casting machine of the injection device according to the present invention, a pair of piston rods capable of independent operation are arranged inside the chuck cylinder, and a pair of chucks are provided at the tip of each piston rod. The plates are fastened opposite to each other, and the center tuning means that moves the pair of chuck plates in synchronization with the product gripping center is provided to improve the chuck efficiency, thereby increasing the cylinder diameter and increasing the cylinder working pressure. The chucking force can be enhanced with a compact structure without increasing the pressure, and reliable chucking can be achieved.

[Embodiment] Next, an embodiment of a product taking-out apparatus for a die casting machine according to the present invention will be described in detail below with reference to the accompanying drawings.

For convenience of explanation, the same parts as those of the conventional configuration shown in FIGS. 5 and 6 are designated by the same reference numerals, and detailed description thereof will be omitted.

1 to 4 show an embodiment of a hand device according to the present invention. FIG. 1 is a front view thereof, and FIG. 2 is a first view thereof.
FIG. 3 is a view taken in the direction of arrow J in FIG. 3, and FIG. 3 is a sectional view taken along line AA in FIG.
FIG. 4 is a sectional view taken along line BB in FIG.

1 and 2, reference numeral 10 indicates a chuck mechanism of a hand device, which chuck mechanism 10 projects from both ends of the actuator 12 so as to be swung by a rotary actuator 12 in a range of 90 ° or 180 °. Output shaft
It is supported by 12a and 12b.

That is, each of the output shafts 12a and 12b has a pair of side plates 1
4a and 14b are fixed in parallel by known fixing means 16a and 16b, and a base plate 18 is fixed to the end portions of the pair of side plates 14a and 14b at right angles thereto.

And, a pair of guide rods 22a, 22b are fixed to the brackets 20a, 20b, 20c, 20d arranged at the four corners of the bottom surface of the base plate 18 in parallel with the axis of the rotary actuator 12, and the guide rods 22a, 22b are attached to the guide rods 22a, 22b. A pair of chuck plates 48a, 48b are slidably guided and supported on both sides thereof via guide members 50 provided respectively on the chuck plates 48a, 48b.

The sliding portion of the guide member 50 is preferably supported by an oilless metal, a linear ball bearing, or the like.

Further, as shown in FIGS. 3 and 4, a double-headed linear motion cylinder 44 is fixed to the center of the bottom surface of the base plate 18. This linear cylinder 44 is a cylinder body
A pair of cylinders 52a and 52b having the same diameter are formed at both inner ends of the cylinder 46 and communicate with each other through small holes.
A piston is slidably inserted therein so that the piston moves in opposite directions. A pair of chuck plates 48a, 48b are securely fastened to the tips of piston rods 54a, 54b formed integrally with the piston.

As shown in FIG. 1, chuck members 56a and 56b for holding products of a die casting machine are replaceably mounted on the inner surfaces of the chuck plates 48a and 48b, which are opposed to each other, at the tips thereof.

In this case, a link mechanism 60 described later is provided in the middle of the chuck plates 48a and 48b, and the link mechanism 60 is configured to move the chuck plates 48a and 48b in synchronization with each other with respect to the chucking center. .

That is, the link mechanism 60 includes a main link 62 pivotably supported at its central portion by a pivot 58 projecting from the bottom surface of the cylinder body 46, and both ends of the main link 62 that are pivotally supported. A pair of auxiliary links 64a, 6 pivotally supported by mounting jigs 66a, 66b fixed to the inner surfaces of the chuck plates 48a, 48b.
It is composed of 4b and.

Since the hand device configured as described above performs the reversing operation and the opening / closing operation of the chuck by the hydraulic pressure supply control by the hydraulic control valve (not shown), hydraulic piping is connected to each port.

In this case, a hydraulic circuit that introduces pressure oil to the actuator 12
As shown in FIG. 1, 68 is one output shaft 12b of the rotary actuator 12 and a side plate fixed to this output shaft 12b.
14b and the base plate 18 are formed so as to be able to communicate with each other, whereby external piping can be eliminated.

The product take-out hand device of the die casting machine configured as described above operates as follows.

That is, the rotary actuator 12 is swing-controlled to a preset desired angular position by operating a hydraulic control valve (not shown), and then the double-headed direct-acting cylinder 44 acts to cause a pair of chucks via piston rods 54a and 54b. The plates 48a and 48b are simultaneously drawn, and the die-cast product is held by the chuck members 56a and 56b.

Thereafter, the gripped product is moved to a predetermined position such as a press die and set at an appropriate position, and the hand device is returned to the initial position with the chuck members 56a and 56b opened.

Needless to say, the opening / closing operation of the pair of chuck plates 48a, 48b can be synchronized by the action of the link mechanism 60 described above.

In this way, the side plates 48a, 4 equipped with the chuck members 56a, 56b are
The 8b can be relatively synchronized with each other by the double-headed direct-acting cylinders provided independently, so that the gripping force can be increased as compared with the conventional single direct-acting cylinder.

Moreover, since the load acting on the pin used in the link mechanism is limited to the range of the sliding resistance with the guide rod, lubrication of that portion is unnecessary and maintenance is facilitated.

Further, since the chuck cylinder is disposed in the vicinity of the guide rod and the chuck force is not transmitted to the tuning means, the chuck transmission efficiency is improved.

[Effects of the Invention] As is apparent from the above-described embodiments, the product take-out device of the die casting machine according to the present invention has a pair of piston rods, which enable separate and independent movements, disposed inside the chuck cylinder. By fastening a pair of chuck member mounting plates to each piston rod and configuring each to have a center tuning function, chuck efficiency is improved, so that compact size is achieved without expanding the cylinder bore or boosting the cylinder working pressure. The structure can enhance the chucking force and achieve reliable chucking.

In the embodiment of the hand device of the present invention, the example in which the link mechanism is adopted as the chuck mechanism having the center tuning function has been described. For example, screws in opposite directions are formed at both ends and attached to the output shaft of the hydraulic motor. A screw shaft driven to rotate via a bevel gear may be used, or a pair of rack gears may be used in combination so that the pinion attached to the output shaft of the rotary actuator and the outer periphery of the pinion are engaged and face each other. Of course.

Although the preferred embodiments of the present invention have been described above, it is needless to say that the present invention is not limited to the embodiments of the present invention and various design changes can be made without departing from the spirit of the present invention.

[Brief description of drawings]

FIG. 1 is a front view of a hand device showing an embodiment of a product removing device of a die casting machine according to the present invention, FIG. 2 is a view taken along the arrow J of FIG. 1 showing a side face of the hand device, and FIG. FIG. 4 is a cross-sectional view taken along the line AA of FIG. 1 showing a main part, and FIG.
-B sectional view, FIG. 5 is a front view of a product take-out hand device in a conventional die casting machine, and FIG. 6 is C- of FIG.
It is C sectional drawing. 10,24 …… Chuck mechanism, 12,26 …… Rotary actuator 12a, 12b …… Output shaft, 14a, 14b …… Side plates 16a, 16b …… Fixing means, 18 …… Base plate 22a, 22b, 34 …… Guide rod , 30 ... Inverting shaft 32 ... Inverting plate, 36, 38 ... Chuck plate 40 ... Link mechanism, 42 ... Spring 44 ... Double-headed cylinder, 46 ... Cylinder body 48a, 48b ... Chuck plate 50 ... ... Guide member, 52a, 52b ... Cylinder 54a, 54b ... Piston rod 56a, 56b ... Chuck member 58 ... Axis, 60 ... Link mechanism 62 ... Main link, 64a, 64b ... Auxiliary link 66a, 66b ...... Mounting jig, 68 …… Hydraulic circuit

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-59-147765 (JP, A) SAIKAI 63-150749 (JP, U) JP-B-55-11947 (JP, B2)

Claims (1)

[Claims] 1. A product take-out hand device provided with a chuck mechanism that can be reversed by a rotary actuator to take out a product cast by a die casting machine from a die surface and set it in a press die, wherein the chuck mechanism is a rotary rear A pair of side plates are fixed to the output shafts at both ends of the chute, and a base plate is fixed to the end parts of these side plates at right angles to it.The base plate is equipped with a chuck actuator, and this actuator is a double-headed direct-acting cylinder. The direct-acting cylinder is formed with a pair of cylinders communicating with each other at both ends thereof through a small hole, and piston rods are inserted into these cylinders so as to move independently and relatively to each other. At the tip of the piston rod, a pair of chuck plates are opposed to each other and fastened. And, product take hand device of the die casting machine, characterized by configured to include a center tuning means for tuning move the pair of chucking plates to product gripping center.