JPH0243558Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a cast product take-out device, and more specifically, a traveling station is movably disposed on a rail provided on a part of a fixed die plate. The present invention relates to a cast product take-out device that is suitably used in a die-casting machine, which is equipped with a cast product take-out device via a slider.

In the field of industrial robots and manipulators,
In many cases, it is necessary to grasp a workpiece or other product with a chuck hand or the like and transport it linearly from position A to position B, and such operation can be accomplished by the stroke movement of the piston arm of the cylinder. However, if this required stroke distance is within the maximum stroke length of the cylinder piston, there is no problem, but if the design requires that the arm extend beyond the piston stroke length. Generally, an arm stroke expansion mechanism is used. The conventional arm stroke expansion mechanism has a pinion 14 rotatably attached to the tip of a piston arm 12 of a vertically arranged cylinder 10, as shown in FIG.
As shown in the figure, this pinion 14 is held between the upper and lower ends of a pair of movable racks 16 and 18, and the cylinder is biased to move the piston arm 1.
2, one of the racks 16 that engaged with the pinion 14 was raised, and the other rack 18 was operated to be lowered. According to this mechanism, the stroke of the arm can be expanded, but the space cannot be absolutely reduced, so it can be used in narrow spaces.
For example, it has been difficult to use it in factories with low ceilings or in places where vertical space is limited, such as when a hoist crane runs near the ceiling.

However, as a conventional mechanism for doubling the stroke of an arm, etc., a pinion rack mechanism is known. Auxiliary sliding pieces are overlapped in contact with the sliding body so that they can slide against each other, a first pinion is pivotally supported on the driving sliding body and this pinion is engaged with the first fixed rack and the first moving rack, and By pivotally supporting the second pinion on the auxiliary sliding piece and meshing the pinion with the second fixed rack and the second movable rack, the driven sliding member moves four times as much as the sliding movement of the driving sliding member. A system configured to do this has been proposed. However, although the quadruple stroke mechanism configured in this way can sufficiently expand the stroke, it not only has a complicated configuration, but also has many problems such as difficulty adjusting the amount of movement due to the large number of racks used. There is a problem.

In addition, as a crank mechanism that similarly doubles the stroke of an arm, etc., a mechanism has been proposed in which a gear connected to the crank by a connecting rod is rolled on a fixed rack, and a movable rack is meshed with the gear. ing. However, in the double stroke mechanism constructed in this way, the gear is attached to the end of the connecting rod attached to the crank, so when the crank and the connecting rod are in a straight line, a dead center occurs, making it difficult to operate smoothly. There are problems such as not being able to achieve proper exercise.

Furthermore, this type of mechanism has the disadvantage that the space required when the device is reduced, that is, the reduced space requires a relatively large space equivalent to the sum of the length of the fixed rack and the length of the movable rack. have

Furthermore, a moving rack with a length of 2L and a length L
When the fixed racks are arranged opposite to each other, a gear mechanism is interposed between these racks, and these gear mechanisms are moved along the fixed rack by the action of a cylinder, the movable rack moves a length of L + 2L = 3L. A device configured as such has also been proposed (Utility Model Application Publication No. 48-6474). However, in this type of device, like the double stroke mechanism, not only smooth movement is not achieved, but especially in reduced spaces, it is necessary to separate the moving and fixed racks in order to maximize the movement of the moving rack. Total length (2L+L=3L)
of space, which is impractical.

Therefore, the inventor of the present invention has overcome all the problems of the stroke expansion mechanism described above, and also arranged a traveling station movably on a rail provided on a part of the fixed die plate, and connected the traveling station with a slider. As a result of extensive research in order to obtain a casting product removal device suitable for use in die-casting machines equipped with a product removal device, a support frame was fixed to one end of the slider, and a fixing rack and an actuator were attached to this support frame. arranged,
On the other hand, a movable rack equipped with a chuck handle for taking out products is disposed opposite to the fixed rack, and a first pinion engages with the fixed rack near one end of the support frame and a second pinion engages with the movable rack near the other end. 2 pinions, and the first
A sprocket is attached to each of the pinion and the second pinion, an endless chain is wound around these two sprockets, and a saddle member configured to interlock the two pinions is attached, and this saddle member is attached to an actuator so that it can be moved. It has been found that by this structure, the space required for the device can be minimized, and the stroke of the chuck hand for taking out products can be expanded with a simple and robust structure.

Accordingly, the object of the present invention is to use a set of fixed racks and a movable rack, and to connect these racks by a saddle member having mutually interlocking pinions in the vicinity of diagonally opposite ends of the racks. A simple and robust configuration that allows the device to be configured to minimize space requirements, allowing for easy and reliable use in locations with vertical space limitations and other horizontal space limitations. An object of the present invention is to provide a device for taking out a cast product in a die casting machine.

In order to achieve the above object, the present invention provides a cast product of a die casting machine in which a traveling station is movably arranged on a rail provided on a part of a fixed die plate, and is attached to this traveling station via a slider. In the take-out device, a support frame is fixed to one end of the slider, a fixed rack and an actuator are arranged on the support frame, a movable rack is arranged opposite to the fixed rack, and a movable rack is arranged near the one end with respect to the support frame. A saddle member having a first pinion that meshes with the fixed rack and a second pinion that meshes with the movable rack near the other end is attached at the saddle member, a sprocket is attached to the first pinion of the saddle member, and a sprocket is attached to the second pinion. , an endless chain is wound around both sprockets to interlock the first pinion and the second pinion, the saddle member is attached to the actuator so as to be movable, and the movable rack is configured to be movable. It is characterized by having a chuck handle at one end for taking out the cast product.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a preferred embodiment of a cast product removal device for a die casting machine according to the present invention will be described in detail with reference to the accompanying drawings.

FIGS. 2 and 3 schematically show a die casting machine and a cast product removal device that runs on rails arranged in relation to the die casting machine. That is, in FIGS. 2 and 3, reference numeral 20
2 shows a bed of a die-casting machine. A fixed die plate 22 is fixed to this bed 20, and a movable die plate 24 is disposed opposite to the fixed die plate 22 so as to be movable forward and backward by tie bars 26. A fixed mold 28 is disposed on the fixed die plate 22, and a movable die plate 2
A movable mold 30 is disposed at 4, and a cast product is obtained by closing both molds and pouring molten metal.

A pedestal 32 is disposed on the top of the fixed die plate 22, and this pedestal 32 and an upright support 34 (third
A rail 36 is suspended from the rail 36 (this rail 36 extends to a work area for subsequent processes such as a trimming press).
A traveling station 38 is mounted so as to be freely movable and is biased by a cylinder (not shown). The travel station 38 is provided with a slider 40, which is capable of horizontally sliding left and right in a direction perpendicular to the rail 36 under the biasing action of a cylinder (not shown).
Further, a cast product take-out device 42 is vertically installed on the slider 40, and a chuck hand 46 is fixed to the tip of an arm 44 that can extend downward to grip and take out products cast in the molds 28 and 30. ing. That is, when one casting is completed and the mold is opened, the ejecting device 42 is moved to the slide 4.
The arm 44 moves downward and grips the cast product 48 with the chuck hand 46. After the slider 40 is moved back and the product 48 is taken out of the mold, the arm 44 rises. ,
After returning to the original position, the station 38 travels along the rail 36 to transport the product 48 to the next process.

Further, the cast product removal device 42 includes a U-shaped support frame 50, a saddle member 54 supported inside the support frame 50 via a pair of guide rods 52, 52 so as to be freely movable in the axial direction.
It basically consists of a pair of guide arms 56, 56 which are inserted through the saddle member 54 and supported so as to be movable up and down, and a chuck hand 58 attached to the tips of the guide arms 56, 56. The U-shaped support frame 50 is shown in FIGS.
It is fixed perpendicularly to the tip of the slider 40 which is slidably disposed on the traveling station 38 explained in the figure.

The support frame 50 is formed by bending the vicinity of both ends of a plate member at right angles in the same direction to form a U-shaped member having a bent top portion 60 and a bent bottom portion 62.
A bent top portion 6 is formed inside the support frame 50.
A pair of guide rods 5 between the bent bottom part 62 and the bent bottom part 62
2 and 52 are arranged in parallel at a predetermined distance apart. As described above, the saddle member 54 is inserted through the guide rods 52, 52, and the support frame 50 is inserted into the guide rods 52, 52.
It is designed to be able to move up and down while being guided by the guide rods 52, 52 inside. That is, as can be clearly seen from FIG. 5, the saddle member 54 has an upper end and a lower end protruding horizontally in opposite directions.
It consists of a casing in which an upper protrusion 64 and a lower protrusion 66 are respectively formed, and the guide rods 52 and 52 are slidably inserted into two through holes 68 and 68 formed in the upper protrusion 64, respectively. be.

Further, as shown in FIG. 5, an actuator 70, preferably represented by a hydraulic cylinder, is disposed inside the support frame 50, and the tip of a piston rod 72, which extends vertically downward when the actuator is energized, It is fixed to a bar 74 extending horizontally from the lower end of the saddle member 54. Therefore,
It will be appreciated that energizing actuator 70 causes piston rod 72 to extend downwardly, lowering saddle member 54 as shown in FIG. Although not shown, the bent bottom portion 62 of the support frame 50 is provided with the piston rod 72 and the bar 7.
A predetermined notch is formed so as not to impede the descent of 4. Further, inside the support frame 50, a rack 76 is fixed upright in front of the actuator 70, with its teeth directed toward the saddle member 54. In the casing of the upper projection 64 of the saddle member 54, i.e. in the vicinity of the upper end of the saddle member 54, the fixing rack 76
A pinion 78 that meshes with the sprocket 78 is rotatably disposed through a horizontal shaft, and two sprockets 80 are fixed to the horizontal shaft adjacent to and sandwiching the pinion 78. Therefore, when the saddle member 54 is lowered by the bias of the actuator 70, the pinion 78 is engaged with the fixing rack 76 and is forced to rotate, causing the two sprockets 80 to rotate simultaneously. In addition, this sprocket 80, 8
0 is chained to the other sprocket which will be described later.

As described above, the pair of guide arms 56, 56 are inserted into the lower horizontal protrusion 66 of the saddle member 54 so as to be able to move up and down. That is, two through holes 82, 82 are formed in the lower horizontal protrusion 66 at a predetermined distance apart.
The guide arms 56, 56 are slidably inserted into the holes, and the guide arms 5
6 and 56 are connected to each other by a suitable plate member 84. Further, the lower ends of the guide arms 56, 56 are also connected by a suitable plate member 86, and a chuck hand 58 is connected to the tip of this arm. In addition,
This chuck hand 58 is a kind of manipulator for gripping the cast product, but since it is a well-known type, it will not be described in detail. As shown in FIG. 4, a moving rack 90 is installed approximately in the middle of the guide arms 56, 56 between the plate members 84, 8.
6 and fixed upright, with the rack teeth oriented toward the saddle member 54. Further, a pinion 92 that engages with the movable rack 90 is rotatably disposed in the casing of the lower horizontal protrusion 66 of the saddle member 54, that is, near the lower end of the saddle 54, through a horizontal shaft. Two sprockets 94 adjacent to and sandwiching this
is fixed to the horizontal axis. Therefore, pinion 9
2 is forcibly rotated, the movable rack 90 meshing with the pinion 92 will vertically move up and down together with the guide arms 56, 56 and chuck hand 58 attached to the movable rack 90. The sprockets 94, 94 are constructed by winding chains 96, 96 around the sprockets 80, 80 disposed in the upper horizontal protrusion 64 of the saddle member 54.
Performs power transmission.

Next, the effects of the cast product removal device according to the present invention configured as described above will be explained. That is,
When the actuator 70 is in the de-energized state, this ejecting device operates on the saddle member 5 as shown in FIG.
4 and the guide arms 56, 56 are compactly reduced. In other words, in this invention,
The fixed rack 76 and the movable rack 90 face each other at the same revision position, and between them there is located a saddle member having pinions 78 and 92 that are vertically spaced apart and interlock with each other, and these pinions and the rack are in mesh with each other. It is. In this way, the reduction space is set to a minimum. Now, when actuator 7 is energized, piston rod 72 extends downward and lowers saddle member 54 connected via bar 74 as shown in FIG. At this time, the pinion 78 that meshes with the fixed rack 76 in the support frame 50 is forcibly rotated as the saddle member 54 descends, and the sprockets 80 and 80 rotate simultaneously.
is connected to the downward horizontal protrusion 6 via the chains 96, 96.
Rotation is transmitted to sprockets 94, 94 disposed at 6. Therefore, the other pinion 92, which rotates simultaneously with the sprockets 94, 94, pushes the moving rack 90 vertically downward (as shown in FIG. 5, since the pinion 78 rotates counterclockwise, the pinion 92 also rotates counterclockwise). direction (thereby pushing down the movable rack 90), the guide arms 56, 56 are also vertically lowered (see FIG. 4), and an enlarged stroke of the chuck hand is advantageously achieved. In this case, the maximum stroke of the movable rack 90, that is, the maximum downward stroke of the chuck hand 58, is determined by the effective length of the movable rack 90 and the opposing pinions 7 within the saddle member 54.
8 and 92 (both sprockets 80 and 94). Note that the ratio between the effective length of the movable rack 90 and the effective length of the fixed rack 76 is correlated to the rotation ratio between the two sprockets 80 and 94, so by setting this rotation ratio to, for example, twice, the movable rack 90 The effective length of the fixing rack 76 is set to twice the effective length of the fixing rack 76.

As described above, the cast product retrieval device according to the present invention has a stroke of the movable rack, that is, a stroke of the chuck hand, which is set larger than that of the conventional device with respect to the reduced space of the device, and has a simple structure and a compact structure, so that it can be vertically It can be suitably used as a cast product take-out device for die-casting machines installed in places where there is limited space in the direction, such as a place where a hoist crane runs on the ceiling, and it can also be used as a workpiece take-out device for press machines or other actuators that have a longer effective stroke. It can be widely applied to various manipulators that require arm extension.

The cast product removal device according to the present invention has been described above with reference to a preferred embodiment, but the present invention is not limited to this embodiment, and many improvements and changes can be made within the spirit of the invention. It's something you get.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of a conventional arm stroke expansion machine, Fig. 2 is an explanatory diagram showing a schematic arrangement of a cast product take-out device of a die-casting machine according to the present invention, and Fig. 3 is the device shown in Fig. 2. side view,
FIG. 4 is a schematic perspective view of a cast product removal device according to the present invention, and FIG. 5 is a side view of the device shown in FIG. 4 in a reduced state. 10...Cylinder, 12...Piston arm,
14... Pinion, 16, 18... Rack, 20
...Bed, 22...Fixed die plate, 24...
...Moving die plate, 26...Tie bar, 28...
...Fixed mold, 30...Movable mold, 32...Pedestal,
34... Support column, 36... Rail, 38... Station, 40... Slider, 42... Product take-out device, 44... Arm, 46... Chuck hand, 48... Cast product, 50... Support frame,
50... Guide rod, 54... Saddle member, 5
6...Guide arm, 58...Chuck hand,
60...Folded top, 62...Folded bottom, 64...
Upper protrusion, 66... Lower protrusion, 68... Through hole, 70... Actuator, 72... Piston rod, 74... Bar, 76... Fixing rack, 7
8...Pinion, 80...Sprocket, 82...
...Through hole, 84, 86...Plate member, 90...Moving rack, 92...Pinion, 94...Sprocket, 96...Chain.

Claims (1)

[Scope of utility model registration request] In a cast product retrieval device for a die-casting machine in which a traveling station is movably arranged on a rail provided on a part of a fixed die plate and is attached to the traveling station via a slider, a support frame is fixed to one end of the slider. , a fixed rack and an actuator are disposed on the support frame, a movable rack is disposed opposite to the fixed rack, a first pinion meshing with the fixed rack near one end with respect to the support frame and the other end thereof; A saddle member having a second pinion that meshes with the moving rack is attached nearby, a sprocket is attached to the first pinion of this saddle member, a sprocket is attached to the second pinion, and an endless chain is wound around both of these sprockets. 1
The pinion and the second pinion are configured to communicate with each other, the saddle member is attached to the actuator so as to be movable, and a chuck hand for taking out the cast product is provided at one end of the movable rack. Equipment for taking out cast products.