JPH06154988A - Device for conveying die casting product - Google Patents

Abstract

PURPOSE:To provide a conveying device for die casting product, which has excellent durability to the intermittent driving in spite of a simple constitution. CONSTITUTION:This device is constituted so that a driving sprocket 14 to which a driven sprocket 15 is wound with a driving chain 16 is linked and connected to a rotary shaft 13 of a driving drum rotary-driving a belts-like endless conveying body 11, and a retractable rod 17 is provided so as to face to the winding intermediate range of the driving chain 16. A ratchet claw engaging/ retracting with/from a connecting frame 16a in the driving chain 16 is fitted to the tip part of the retractable rod 17, and the driving sprocket 14 is intermittently rotary-driven by linking with the retracting action of the rod 17.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer device for intermittently transferring a cast product taken out from a die casting machine to a desired post-treatment process.

[0002]

2. Description of the Related Art Generally, in a series of steps for producing a die cast product, a cast product (hereinafter referred to as a work) taken out from a casting machine by a take-out device is carried to a working position of an operator through a carrying device, As shown in FIG. 6, after performing a trimming process such as removing unnecessary members such as the sprue part b and the gas venting part c from the work a, the finished product d is housed in a receiving box and transferred to the next step. Or, in order to eliminate waste of the defective work that has cracked or the like and the unnecessary parts discharged during the trimming process as much as possible, conventionally, these defective works and unnecessary parts are stored in a receiving box and manually melted by the operator. Since it was returned to the holding furnace, the workability was extremely poor, and the operator himself had a heavy burden.

Therefore, there has been proposed a structure in which a roller conveyor or the like is installed until the melting and holding furnace so that defective works and unnecessary members are automatically returned to the melting and holding furnace. Work a immediately after being taken out from
Is heated to a high temperature of about 200 ° C., therefore, if the defective work and unnecessary members are returned to the melting and holding furnace in a high temperature state in a short time, they will be rapidly melted in the melting and holding furnace. Along with this, the air contained in the "su" or the degassing part c becomes bubbles in the melting and holding furnace, and the dissolved liquid is scattered outside the furnace, which is extremely dangerous for the worker who works in the vicinity of the holding furnace. Become.

Therefore, a roller conveyor for carrying to the melting and holding furnace is intermittently driven by a drive motor so as to lengthen the carrying time, and during this time, a defective work in a high temperature state and unnecessary members are naturally cooled. Although it is possible to prevent the dissolution liquid from scattering outside the furnace, the structure for intermittently driving the roller conveyor becomes complicated,
Further, since the rotation and stop are frequently performed, the life of the drive motor is shortened, and a transport device that has a simple structure and can ensure durability in repeated intermittent transfer is eagerly awaited. It had been.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances and was devised in order to solve the drawbacks of the related art. The object of the present invention is to provide an intermittent structure with a simple structure. An object of the present invention is to provide a transport device having excellent durability against driving.

[0006]

In order to solve the problem, the technical means adopted by the present invention is to wind a drive chain between a driven chain and a driven sprocket around a rotary shaft of a drive drum for rotationally driving a belt-shaped endless carrier. The drive sprockets are linked together,
In addition, the retractable rods are arranged side by side so as to face the winding intermediate region of the drive chain, and a ratchet claw that engages and disengages with the connecting piece of the drive chain is attached to the tip end of the retractable rods to perform the retractable rod operation. It is characterized in that the drive sprocket is configured so as to be driven to rotate intermittently in connection with the.

[0007]

Therefore, according to the present invention, it is possible to reliably and intermittently transfer the defective work and unnecessary members placed on the carrier to the melting and holding furnace, and to perform the repeated intermittent operation for a long period of time. Therefore, the reliability of the transfer device can be improved.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be described in detail based on an embodiment shown in the drawings. FIG. 1 is an overall plan view showing the arrangement of each device related to the die-casting work, 1 is a die-casting machine, 2 is a take-out device equipped with a work take-out arm 2a, 3 is a trimming processor, and 4 is a melting and holding furnace. Therefore, the work a molded by the die casting machine 1 is
The workpiece is picked up by the work take-out arm 2a of the take-out device 2 and transferred to the trimming processor 3, where unnecessary parts such as the sprue part b and the gas venting part c are removed from the work a, and the finished product d is obtained. Is sorted with the defective work e and conveyed to a post-processing step (not shown) via the conveyor 5, and the unnecessary members b and c and the defective work e are transferred to the melting and holding furnace 4 via the shooter 6 and the transport device 7. It is configured to be transferred.

As shown in FIGS. 2 to 4, the transport device 7 has a belt-shaped endless transport body 11 wound between a drive drum 9 and a driven drum 10 pivotally provided between both ends of the frames 8a and 8b. It is constructed, is installed between the supporting legs 6 and 6 and reaches the melting and holding furnace 4, and a driving mechanism 12 is arranged on the frame 8a side.

The drive mechanism 12 coaxially pivotally supports a drive sprocket 14 at one end of a rotary shaft 13 that pivotally supports the drive drum 9, and a driven sprocket 15 pivotally supported at a predetermined distance from the drive sprocket 14. Connection piece 16 between
A drive chain 16 composed of a, 16a, ... Is wound, and a cylinder mechanism 18 in which a retractable rod 17 is fitted is disposed near the driven sprocket 15. A long connecting plate 17a is screwed onto the tip of the retractable rod 17, and a ratchet claw 19 that hangs the tip 19a downward is provided at the tip of the connecting plate 17a.
The ratchet claw 19 is pivotally supported on the ratchet claw 19 by a coil ammunition machine 21 mounted between the base end of the ratchet claw 19 and the connecting plate 17a. Reference numeral 22 is a stopper that restricts the rotation of the ratchet pawl 19, and 23 is an operator that turns on and off a contact switch 24 described later.

On the other hand, on the frame 8a on the side of the drive sprocket 14, there is provided a contact switch 24 which is turned on / off by the contact of the actuator 23 of the connecting plate 17a, and when the contact switch 24 is on. The protrusion / removal of the rod 17 is released, the rod 17 is retracted into the cylinder mechanism 18, and this ON signal is sent to a control unit (not shown) to set the interval of the rod 17 to be retracted / removed. It is configured to be synchronized with the operation control of each mechanism of the take-out device 2 and the trimming processor 3.

With the above construction, when the die casting machine 1 is started and the casting operation is started, the casting machine 1 is started.
The work a molded by is gripped by the work taking-out arm 2a of the take-out device 2 and transferred to the trimming processing machine 3, where the trimming processing machine 3 removes the sprue part b, the degassing part c, etc. from the work a. The unnecessary members are removed, and the finished product d is sorted with the defective work e and conveyed to a post-processing step (not shown) via the conveyor 5, while the unnecessary members b and c and the defective work e are passed through the shooter 6. It is transferred onto the belt-shaped endless carrier 11 of the carrier 7.

Next, an operation signal from a control unit (not shown) is sent to the cylinder mechanism 18, and the retractable rod 17 of the cylinder mechanism 18 is operated to project. At this time, the tip portion 19a of the ratchet pawl 19 attached to the connecting plate 17a is locked between the connecting pieces 16a, 16a of the drive chain 16,
The ratchet pawl 19 in a state of being abutted and supported by the stopper 22
Pulls the drive chain 16 by the stroke L of the retractable rod 17 in the direction of arrow A, the drive sprocket 13 is rotated in the direction of arrow B, and the drive drum 9 rotates through the rotary shaft 13 accordingly, and the belt-shaped endless conveyance is performed. The body 11 is driven toward the melting and holding furnace 4 side, and at the same time, the operator 23 of the connecting plate 17a contacts the contact switch 24, and the corresponding contact switch 24
In the ON state, the protruding and retracting rod 17 is released, and the rod 17 retracts into the cylinder mechanism 18 and returns to the initial state.

Therefore, the strip-shaped endless conveyor 11 is intermittently driven by repeating the above-mentioned operation of retracting and retracting the rod 17, and unnecessary members b and c on the strip-shaped endless conveyor 11 are driven.
Since the defective work e is intermittently transferred toward the melting and holding furnace 4, the above-mentioned need is not reached by the time the transfer end side is reached even if it is in a high heat state when placed on the transfer start end side of the band-shaped endless transfer body 11. Since the members b and c and the defective work e are sufficiently cooled and are in a normal temperature state during the transfer period when they reach the melting and holding furnace 4, degassing of unnecessary members put into the melting and holding furnace 4 is performed. The air contained in the portion c or the air contained in the “su” contained in the defective work e does not form bubbles in the melting and holding furnace 4 and the dissolved liquid does not fly outside the furnace, and the holding furnace 4 It is possible to secure the safety of the worker who works in the vicinity of, and it is possible to perform a smooth and reliable die casting molding work.

[0015]

In summary, according to the present invention, the drive sprocket in which the drive chain is wound between the driven chain and the driven sprocket is interlockingly connected to the rotary shaft of the drive drum for rotationally driving the belt-shaped endless carrier, and the drive is performed. The protruding and retracting rods are arranged side by side so as to face the intermediate winding region of the chain, and a ratchet claw that engages with and disengages from the connecting piece of the drive chain is attached to the tip of the retractable rod to connect to the retracting operation of the rod. Since the drive sprocket is configured to be driven to rotate intermittently, when a cast product is conveyed in a series of die casting operations, even if the work immediately after being taken out from the casting machine is heated to a high temperature state, It can be cooled sufficiently while being intermittently transferred, and without considering the complicated structure and motor life etc. when intermittently driving a conventional roller conveyor with a drive motor, Even though it has a simple structure, the intermittent drive mechanism can be greatly simplified and durability can be significantly improved, and intermittent transfer of a conveyed object can be performed safely and reliably, thereby significantly improving work efficiency. be able to,
That is, it has an extremely useful new effect.

[Brief description of drawings]

FIG. 1 is an overall plan view showing the flow of a die casting molding operation.

FIG. 2 is a partially omitted side view of a transfer device.

FIG. 3 is a partially omitted plan view of the same.

FIG. 4 is an enlarged side view of a main part.

FIG. 5 is an explanatory view of the same as above.

FIG. 6 is an overall perspective view of a cast product (workpiece).

[Explanation of symbols]

 7 Transport Device 9 Drive Drum 11 Endless Belt-Shaped Carrier 13 Rotating Shaft 14 Drive Sprocket 15 Driven Sprocket 16 Drive Chain 16a Connecting Piece 17 Ejecting Rod 19 Ratchet Claw a Casting (Work)

Claims (1)

[Claims] 1. A drive sprocket in which a drive chain is wound around a driven sprocket is interlockingly connected to a rotary shaft of a drive drum that rotationally drives a belt-shaped endless carrier, and the drive chain is provided in an intermediate winding region of the drive chain. In addition to arranging the retractable rods in parallel, a ratchet pawl that engages with and disengages from the connecting piece of the drive chain is attached to the tip of the retractable rods, and the drive sprocket is driven to rotate intermittently in connection with the retractable operation of the rods. Conveying device for die cast products, characterized by being configured accordingly.