JPH0225560Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to a safety cover device with an emergency stop for die casting, in which the safety cover automatically opens and closes during die casting to prevent accidents. It is something.

(Prior Art) In a die-casting machine, when performing molding work, a movable plate moves forward together with the movable mold toward the fixed mold to perform mold clamping at the same time as the die-casting machine is started, and presses against the fixed mold. The pattern of die casting machine molding work is to repeat the process of completing mold clamping, press-fitting molten metal, and molding. However, during such die-casting operations, when the mold is clamped and when molten metal is press-fitted, there are cases where the hand gets caught between the two molds, or the molten metal press-fitted from the gap between the two molds spews out, causing burns. Accidents such as accidents may occur.

Therefore, as shown in Figure 7, the current common method is one in which a guide rail is installed on the left and right fixed plates of the die-casting machine, and a safety cover is attached to this guide rail so that it can be opened and closed laterally. has been done.
However, since these devices are manually operated, it is very troublesome to open and close them each time, and accidents may occur if the cover is not used. In addition, since the moving plate operates regardless of whether the safety cover is opened or closed, the effect is the same as when there is no safety cover, which often causes problems such as hands getting caught or molten metal spewing out. This is the current situation.

(Problem to be solved by the invention) Therefore, this invention improves the above-mentioned drawbacks by using a crank mechanism linked to the moving plate of the die-casting machine, and a safety cover with an automatic stop device. The safety cover is automatically opened and closed simultaneously with the operation of the die-casting machine, and the molding operation of the die-casting machine is automatically stopped when the tip of the safety cover comes into contact with an object.

Therefore, it is possible to prevent failures, accidents, etc., which are conventional.

(Means for Solving the Problems) In order to ensure the above-mentioned emergency stop safety cover device, this invention links the safety cover and the movable plate with a mounting base, and also connects the safety cover and the mounting base with each other. It is linked to the crank mechanism using a moving arm. Further, a link is connected to the moving arm, and the link is operated in conjunction with a moving body attached to the moving plate.

(Embodiment) Next, an embodiment of this invention will be described with reference to the drawings. The safety cover 1, which opens and closes by moving the movable plate 35 located on the die-casting machine stand 36 installed on the floor etc., has an emergency stop at the tip. A movable contact piece 2 is supported by upper and lower support shafts 3, 3. Movable contact piece 2
An operating groove 4 is provided only at the lower end of the holder, so that the holder slides on the support shaft 3. Further, a pressing piece 5 is attached below the movable contact piece 2, and the pressing piece 5 is inserted into an emergency stop case 6, and its tip is adapted to operate a stop switch 7. Next, a plurality of fittings 8, 8 are attached to the surface of the safety cover 1 by means of fixed shafts 10, 10, and these fittings 8, 8 are attached to the surface of the safety cover 1.
At the center of the movable arms 11, 12 are rotary shafts 9,
9 to fix the shaft.

Next, as shown in FIG. 5, a mounting base 26 fixed to the front surface of the machine base 36 by left and right support arm pieces 25, 25 has a pivot 19 attached to the lower part of the movable arm 11.
The shaft 19 is rotatably attached to the
A spring 34 is wound around the outer periphery of the safety cover 1 so that the safety cover 1 is always pressed in the closing direction. The lower end of the movable arm 12 is fixed to a mounting base 26 with a support shaft 20, and a locking portion 23 is provided at the tip of the support shaft 20.
A movable link 15 provided with a movable link 15 is fixed. A transverse transmission link 13 is connected to the upper part of the movable link 15 by a shaft portion 16. The end of the transmission link 13 is connected by a shaft portion 17 to the middle of an operating link 14 which is rotatably connected to a mounting arm 18 attached to a mounting base 26 by a support shaft 32.

Furthermore, the insertion pin 21 shown in FIG. 3 is removably inserted into a through hole 22 that is bored in the mounting base 26 and serves as a stopper, so that the fixed mold 37 and the movable mold 38 can be replaced. This function serves to stop the operation of the operating link 15 when the safety cover 1 is moved back to the position shown in FIG. 1 so as not to interfere with work.

Reference numeral 24 is a stop shaft that stops the safety cover 1 in the forward position. Further, a balancer 28 is installed at the lower end of the movable arm 11 to assist the spring 34. Further, reference numeral 27 indicates a relay box connected to an operation panel (not shown) by a lead wire 45 connected to the emergency stop case 6. Furthermore, as shown in Figure 6,
Inside the movable body 30, which is attached to the movable plate 35 with fixing bolts 31, 31, there is housed a sliding body 29 having an operating wheel 33 at its tip. This sliding body 29 is attached to its upper part so that it can be adjusted telescopically using several fixing adjustment bolts 39, 39, . . . .

The operating wheel 33 is engaged with the operating link 14 which rotates in the forward direction by the spring 34. Reference numerals 40 and 41 indicate fixing plates on the machine base 36.

Next, what is shown in FIG. 7 is a conventionally commonly used safety cover device, and its fixing plate 4
0 and 41, guide rails 42 and 42 are installed in upper and lower stages, and the safety cover 1 having wheels 43 provided on the guide rails 42 and 42 can be slidably opened and closed.

(Function) This device has the above-mentioned configuration. To explain how to use this device now, first, the movable plate 35 has a fixed mold 37 and a movable mold 38, which differ depending on the shape of the molded product. Since the stopping position of the movable plate 35 when the mold clamping is completed changes depending on the thickness of It is linked to the forward and backward strokes of opening and closing of 35. During press-fitting in the molding operation, as the moving plate 35 moves, the safety cover 1 moves to the mold part and covers the mold part, as shown in FIG. As shown in FIG. 1, the complete cover 1 together with the moving plate 35 is automatically retracted to a position where it does not interfere with the work.

Next, the safety cover 1 is moved forward and backward in conjunction with the movable plate 35 when the operating wheel 33 at the tip of the movable body 30 provided on the movable plate 35 moves forward. An operating link 14 connected by a link 15 and a transmission link 13 is connected to the pivot shaft 1 of the movable arm 11.
Since the tension of the spring 34 provided on the outer periphery of the spring 34 and the balancer 28 constantly press against the operating wheel 33, the operating link 14 also rotates by the support shaft 32 as the movable plate 35 moves back and forth. , a movable arm 1 coaxially fixed to a support shaft 20 that rotates with the movable link 15 as the transmission link 13 moves;
2 also rotates. At this time, like the movable arm 12, the other movable arm 11 also moves the safety cover 1 back and forth by means of a fixture 8 having a rotation shaft 9.

The molding operation is then carried out by sequentially repeating the above operating steps.

Furthermore, to explain the operation of the emergency stop cover device, when a part of a person's head, hand, etc. comes into contact with the movable contact piece 2 at the tip of the safety cover 1 during molding work, the movable contact piece 2 is pressed downward. The piece 5 is connected to the stop switch 7 inside the emergency stop case 6, the relay box 27 is obtained by the lead wire 45, and the movable plate is operated by operating the emergency operation panel (not shown) from the lead wire 45. The molding operation of No. 35 will be stopped. At the same time, the safety cover 1 also stops moving forward and backward.

(Effects of the invention) As described above, according to the safety cover device of this invention, there are no accidents such as getting a part of the body such as a hand or head caught between the molds that occur during the molding operation of a die-casting machine. In addition, this is an excellent practical effect in that it can reliably prevent molten metal from ejecting from between the two molds during molding and scattering on the face or body.

In addition, since the safety cover is automatically opened and closed at the same time as the movable plate moves forward and backward, it is possible to completely prevent accidents that occur without opening and closing the safety cover as in the past, and the complete operation is extremely simple. It has excellent effects.

This safety cover has the convenient effect of being able to be installed extremely reliably by a simple device of attaching a mounting base to the front of various die-casting machines and attaching a movable body to a movable plate.
In addition, since the safety cover is linked to the crank mechanism using the mounting base and multiple movable arms,
The safety cover operates reliably, the stroke is longer than the movable plate, the stroke speed of the movable arm is reliable and quick, and the length of the stroke can be easily adjusted to move the safety cover to the desired position. It has an excellent effect of being able to.

[Brief explanation of the drawing]

Figure 1 is a front view with the mold opened and the safety cover retracted, Figure 2 is a front view with the safety cover closing the mold part, Figure 3 is a front view of the safety cover,
Figure 4 is a front view of the emergency stop case showing the inside, Figure 5 is a side view taken from line A-A to line B-B in Figure 3, and Figure 6 is a side view taken along line B-B in Figure 3. The side view and FIG. 7 are front views of a conventionally used sliding door type safety cover. 1 is a safety cover, 2 is a movable contact piece, 3 is a support shaft, 4 is an operating groove, 6 is an emergency stop case, 11,1
2 is a movable arm, 13 is a transmission link, 14 is an operating link, 15 is a movable link, 16 and 17 are shaft parts,
19 is a pivot, 21 is an insertion pin, 22 is a through hole, 2
3 is a locking portion, 24 is a stopper, 26 is a mounting base, 28 is a balancer, 29 is an adjustment piece, 30 is a moving body, 33 is an operating wheel, 34 is a spring, 35 is a moving plate, 36 is a machine base, 37 is a A fixed mold, 38 a movable mold, 40 a fixed plate, 42 a guide rail, and 45 a lead wire.

Claims (1)

[Scope of utility model registration request] The safety cover 1 is moved by the movement of the moving plate 35.
In a safety cover device with an emergency stop for die-casting that opens and closes, the safety cover 1 has a movable contact piece 2 for emergency stop at the tip, and upper and lower support shafts 3,
3, an operating groove 4 is provided only at the lower end of the movable contact piece 2, and the movable contact piece 2 is slidably attached to the support shaft 3. A pressing piece 5 is attached to the lower part of the movable contact piece 2, and an emergency stop is provided. It is inserted into the case 6, and its tip is connected to the stop switch 7, and on the surface of the safety cover 1, a plurality of movable arms 11 and 12 are connected to the crank mechanism, and one of the movable arms 12 has a transmission link. 13, and the moving body 3 in which the transmission link 13 is attached to the moving plate 35.
A safety cover device with an emergency stop for die casting, characterized by being linked to zero.