JP2004050259A - Press die transfer cart - Google Patents

Abstract

The present invention provides a press die transfer cart that allows a press die to be efficiently exchanged without performing a crane operation near a front position of the press.
A traveling wheel (13a, 13b) is disposed at one end left / right position and the other end left / right position of a bogie frame (11) in the front-rear direction. The traversing wheels 26a and 26b are disposed at the front and rear ends of the bogie frame 11 in the left-right direction and at the front and rear positions of the other end. The traveling wheels 13a and 13b can be moved up and down so that the load of the entire bogie is selectively received by the traveling wheels 13a and 13b or the traversing wheels 26a and 26b. The traveling wheels 13a and 13b and the traversing wheels 26a and 26b can be driven by the electric motor 23, and the battery 12 for supplying power to the electric motor 23 is mounted on the bogie frame 11.
[Selection diagram] Fig. 1

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a press die transfer cart that transfers a press die used in a press machine such as a transfer press.
[0002]
[Prior art]
In the case of a transfer press as an example of a press machine, as schematically shown in FIG. 5, a bed 1 laid along a press line L, and a press line L direction The position between the columns 2 along the direction of the press line L in the press housing 4 which is composed of columns 2 standing up at a required interval and a crown 3 connecting the upper ends of the columns 2 is defined by a press station. A slide 5 is arranged above and below each press station S so as to be movable up and down, and a die transfer cart 8 with a bolster 9 mounted on the upper surface is located below each press station S. The upper die 6 as a press die is set on the lower surface of the slide 5, and the press die is placed on the bolster 9. The lower mold 7 is set, and the slide 5 of each press station S is moved up and down by the slide drive device incorporated in the crown 3 so that a work such as a panel is moved between the upper and lower molds 6 and 7. Press forming is possible. Further, as shown in FIG. 6, the mold transporting cart 8 is of an external power supply system connected to a power supply cable 10 and can be moved only within the length of the power supply cable 10. It can be moved between the station S and the outside of the press housing 4.
[0003]
When press molding is performed at the press station S of the transfer press as described above, an old mold 6, 7 is replaced with a new mold for each station, or a different product is formed for forming a different product. In some cases, the molds 6 and 7 may be replaced with another suitable one. In the case of such replacement of the molds 6 and 7, conventionally, as shown in an example in FIG. After the upper mold 6 is placed on the upper mold 7, the upper mold 6 is removed and the slide 5 is lifted. Next, the mold carrier 8 on which the upper and lower molds 6 and 7 are placed is moved from the press station S to the press line S. It is moved in a direction perpendicular to L and pulled out to the front surface position of the press housing 4. At this time, since the mold transporting cart 8 is of an external power supply system, the power supply cable 10 protruding from the lower side of the press housing 4 is being dragged. Next, at this position, the upper and lower dies 6, 7 are lifted together by a crane (not shown) and transported to the die storage area, and then the upper and lower dies 6, 7 transferred from the die storage area by the crane. Is suspended and mounted on a bolster 9 on a mold carrier 8, and thereafter, the mold carrier 8 is moved into the press station S, and the upper mold 6 is placed on the lower surface of the slide 5, and The lower mold 7 is set on the upper surface of the bolster 9.
[0004]
[Problems to be solved by the invention]
However, in the above-described conventional mold exchanging work, the mold transporting cart 8 can move only within the length range of the power supply cable 10, so that there is a problem that the crane work near the front position of the press housing 4 becomes complicated. In addition, there is an inconvenience that the die transfer cart 8 cannot be shared between the press stations S. In addition, since the dies 6 and 7 are lifted by the crane from the dies storage area, the dies 6 and 7 need to be aligned at each press station S, and it takes time to replace the dies. .
[0005]
Therefore, the present invention makes it possible to eliminate the need for crane work near the front position of the press, and to allow a truck to be shared between press stations and between presses. It is intended to make it possible to easily perform the positioning.
[0006]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention has a configuration in which a battery is mounted on a bogie frame on which a press die is mounted on an upper surface, and the battery can be self-propelled by power supply from the battery.
[0007]
Because it is a battery-mounted type, it can be moved to the die storage yard with the press die loaded. Therefore, the dies can be transshipped using the cranes in the dies storage yard, and the crane operation near the front portion of the press can be eliminated.
[0008]
In addition, by moving one of the traveling wheel and the traversing wheel provided on the bogie frame up and down so as to switch between traveling and traversing, movement in a narrow space can be easily performed.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0010]
FIGS. 1 to 4 show an embodiment of the present invention. The lower die 7 is disposed at each press station S of the transfer press shown in FIG. In a configuration similar to that of the mold transporting trolley in which the battery 12 can be set, a battery 12 is mounted on the trolley frame 11, and the press die transporter has a configuration in which it can be self-propelled by the power supplied from the battery 12. It is assumed to be a cart I.
[0011]
More specifically, one end left and right positions in the front-rear direction (arrow X direction) of a rectangular bogie frame 11 formed from the front surface of the press housing 4 in a direction perpendicular to the press line L so as to be able to enter and exit the press station S. The running wheels 13a and 13b are respectively disposed at the left and right positions of the other end, and the running wheels 13a and 13b are rotatably mounted on the eccentric shaft portion 14b of the wheel shaft 14 having the main shaft portion 14a and the eccentric shaft portion 14b. At the same time, the main shaft portion 14a of each wheel shaft 14 is rotatably supported by a bearing 15 fixed on the bogie frame 11, and the eccentric shaft portion 14b of each wheel shaft 14 has a base end portion of a lifting lever 16 And the rod end of an electric cylinder 17 as an elevating drive device arranged and supported in the front-rear direction is connected to the distal end of each elevating lever 16. By displacing the wheel axle 14 about the main shaft portion 14a via the elevating lever 16 by the expansion and contraction operation of the dynamic cylinder 17, the traveling wheels 13a and 13b are moved through the opening 31 provided in the bottom plate 11a of the bogie frame 11 to move the bogie frame 11 Is moved up and down between a position accommodated above the bottom plate 11a (a position indicated by a two-dot chain line in FIG. 2) and a position protruding downward (a position indicated by a solid line in FIG. 2).
[0012]
A gear 18 is integrally fixed to one side surface of the traveling wheel 13a on one end side in the front-rear direction, and is rotatably fitted to an eccentric shaft portion 14b of the wheel shaft 14, while traveling on the bogie frame 11. A power transmission shaft 19 is disposed at a position inside the wheel 13a so as to extend in the left-right direction (arrow Y direction), and both ends are rotatably supported by bearings 20, and both ends on the power transmission shaft 19 In the vicinity of the section, a gear 21 meshed with the gear 18 integral with the traveling wheel 13a is attached, and a transmission gear 22 is attached to a required portion of the power transmission shaft 19 at an intermediate portion. An electric motor 23 as a bogie driving device is installed at one end in the front-rear direction, and a drive gear 25 connected to an output shaft of the electric motor 23 via a speed reducer 24 is connected to a transmission gear on the power transmission shaft 19. 2 In a state where the traveling wheels 13a and 13b protrude downward, the drive gear 25 is rotated by driving the electric motor 23, and the rotational force is transmitted to the transmission gear 22, the power transmission shaft 19, the gear 21, and the gear 18. This allows the bogie frame 11 to travel in the front-rear direction using the traveling wheels 13a as traveling drive wheels and the traveling wheels 13b as traveling driven wheels.
[0013]
Further, at one end and the other end in the left-right direction on the bogie frame 11, the traversing wheels 26a are spaced apart from each other by a predetermined distance in the front-rear direction so as to be at an intermediate height position between the elevation positions of the traveling wheels 13a, 13b. 26b, and one end side of the traversing wheel 26a is mounted on one long wheel shaft 27 arranged in the front-rear direction, and the wheel shaft 27 is rotatably supported by a bearing 28. One end of the wheel shaft 27 is connected to the power transmission shaft 19 via a bevel gear mechanism 29, and the traversing wheel 26 b at the other end in the left-right direction is rotatably supported by a bearing 33. The driving gear 25 is rotated by the drive of the electric motor 23 in a state where the traveling wheels 13a and 13b are accommodated in an upper state, and the rotational force is transmitted to the transmission gear 22, the power transmission shaft 19, and the bevel gear mechanism. By transferring 9 on the wheel shaft 27 through the transverse wheel 26a as transverse drive wheels, also the transverse wheel 26b as rampant driven wheels, so that is caused to traverse the carriage frame 11 in the lateral direction.
[0014]
In the above configuration, the battery 12 is mounted at an appropriate position on the bogie frame 11, and an internal power supply system is used in which the electric motor 23 and the electric cylinder 17 are driven by electric power supplied from the battery 12. In FIG. 1, reference numeral 32 denotes a control for sending a drive command to the driver of the electric motor 23 or the electric cylinder 17 based on a command from an external remote control unit or a command from an operation unit mounted on the bogie I itself. Show the board.
[0015]
The press die transport cart I of the present invention having the above-described configuration is used by being fixed in the press station S of the press housing 4 like the conventional die transport cart 8. In the stationary state in the press station S, a press load is not applied to the wheels 13a, 13b, 26a, 26b by a well-known means, for example, such that the wheel receiving portion of the bed 1 is lowered by a required amount. It is like that.
[0016]
When the molds 6 and 7 need to be replaced, as shown in FIGS. 3 and 4, the slide 5 is lowered and the upper mold 6 is placed on the lower mold 7, and the press is first pressed. The entire mold transporting trolley I is moved from the press station S to a position near the front surface of the press housing 4. At this time, as shown by the solid line in FIG. 2, each of the electric cylinders 17 is extended, and the wheel shafts 14 are rotationally displaced via the lifting / lowering levers 16, thereby lowering the traveling wheels 13a and 13b, thereby transferring the press die. When the electric motor 23 is driven in this state by causing the traveling wheels 13a and 13b to receive the load of the entire bogie I, the rotational force is transmitted through the driving gear 25, the transmission gear 22, the gear 21, and the gear 18 to the traveling wheel 13a. Is transferred to the press die transport cart I in a direction perpendicular to the press line L.
[0017]
Next, as shown by a two-dot chain line in FIG. 2, each of the electric cylinders 17 is contracted and the wheel shafts 14 are rotationally displaced via the elevating levers 16 to raise the respective running wheels 13a and 13b. In this state, the electric motor 23 is driven, and the rotational force is transmitted from the drive gear 25 to the transmission gear 22, the power transmission shaft 19, and the bevel gear mechanism. 29, the trolley I is traversed by the traversing wheels 26a and 26b by transmitting it to the traversing wheels 26a via the wheel axle 27, and further, if necessary, the trolley I is switched between running and traversing, so that the dies I Move to yard.
[0018]
When the press die transport cart I arrives at the die storage yard 34, the used upper and lower dies 6, 7 placed on the bolster 9 are lifted down by a crane, and then the upper and lower dies to be used next time are lifted. The dies 6 and 7 are placed on the bolster 9 using a crane. At this time, the lower mold 7 is accurately set on the bolster 9, and the upper mold 6 is placed thereon.
[0019]
Thereafter, the press die transport cart I on which the upper and lower dies 6, 7 are placed is self-propelled while appropriately switching between running and traversing in the same manner as described above, and the press housing 4 is positioned in front of the target press station S of the press housing 4. After being moved to the position, the press die transporting carriage I is caused to enter the press station S and to be stationary. Next, the slide 5 is lowered, the upper die 6 is set on the slide 5, and the slide 5 is raised. At this time, since the lower mold 7 is already set on the bolster 9, the upper mold 6 is set on the slide 5 so that the upper and lower molds 6, 7 can be aligned.
[0020]
As described above, since the press die transporting cart I can mount the battery 12 and run by itself to an arbitrary place, the reloading work of the dies 6 and 7 can be performed in the die storage yard 34. The crane does not move between the front position of the housing 4 and the mold storage yard 34, and the work of replacing the molds 6 and 7 can be performed efficiently in a short time. Further, since the press die transporting cart I can be shared between the press stations S, the positioning of the dies 6 and 7 can be easily performed regardless of which press station S is used. Further, for example, in a case where four press stations S are provided as shown in FIG. 5, if two press die transport carts I are prepared for each press station S, one press die S can be used while the other one is in use. The next dies 6 and 7 can be placed on the table and kept on standby, so that the dies can be exchanged more efficiently.
[0021]
In the above-described embodiment, an example of application to a transfer press has been described. However, the present invention can be applied to other press machines, and the embodiment shows a case where the traveling wheels 13a and 13b can be moved up and down. However, the traversing wheels 26a and 26b may be made to be able to move up and down. Further, in the embodiment, for convenience of explanation, the traveling direction is perpendicular to the press line L, but the direction parallel to the press line L is It goes without saying that various changes may be made without departing from the gist of the present invention, as well as traveling.
[0022]
【The invention's effect】
As described above, according to the press die transport cart of the present invention, the following excellent effects are exhibited.
(1) Since a battery is mounted on a bogie frame on which a press die is placed on the upper surface, and the battery can be self-propelled by power supplied from the battery, power is supplied as in a conventional die transport cart. The range of movement is not restricted by the length of the cable, so that it is possible to move to the mold storage yard and reload the mold, and therefore crane work near the front of the press Can be performed efficiently, and the dies can be exchanged efficiently, and the trolley can be shared between the press stations of the transfer press and between different presses. It can be carried out.
(2) Either the traveling wheel or the traversing wheel provided on the bogie frame can be moved up and down to switch between traveling and traversing, so that the vehicle can move smoothly and smoothly even in a narrow space. This is advantageous because it can be moved out of the way of the work.
[Brief description of the drawings]
FIG. 1 is a schematic plan view of a bogie frame showing an embodiment of a press die transport bogie according to the present invention.
FIG. 2 is a view in the direction of arrows AA in FIG. 1;
FIG. 3 is a schematic side view showing an example of a mold replacement procedure.
FIG. 4 is a plan view of FIG. 3;
FIG. 5 is a schematic front view showing an example of a transfer press.
6 is a view taken in the direction of arrows BB in FIG. 5;
[Explanation of symbols]
6 Upper die (press die)
7 Lower mold (press mold)
11 cart frame 12 batteries 13a, 13b running wheels 26a, 26b traversing wheels

Claims (2)

A press die transporting cart having a configuration in which a battery is mounted on a bogie frame on which a press die is placed on an upper surface, and the battery can be self-propelled by power supply from the battery. 2. The press die transporting vehicle according to claim 1, wherein either one of a traveling wheel and a traversing wheel provided on the bogie frame can be moved up and down so that traveling and traversing can be switched.

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