JPS6365413B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a press machine in which an upper die is fixed to an elevating table above a base in order to press or forge a workpiece in cooperation with a lower die fixed on the base. Regarding a conveyance device.

Conventionally, as a conveying device for such a press machine, there is one in which a transver with an arm is provided on a base, or a handling device is provided in an elevating table, corresponding to a processing station. However, in the case where the transver is provided on the base, the structure is not only complicated, but also the working space for mold exchange and maintenance is narrow. Furthermore, in the case where the lifting platform is provided with a handling device, it is difficult to transport a plurality of workpieces at the same time, and the transport time becomes long.

The present invention has been made to solve such conventional technical problems, and an object of the present invention is to provide a conveyance device for a press machine that has a relatively simple structure and can increase the conveyance speed. do.

Hereinafter, one embodiment of the present invention will be explained with reference to the drawings. First, in FIG. 1, on the base 1,
A carry-in station 3, a processing station 4, and a carry-out station 5 are set in order along a carry-in direction 2 indicated by an arrow, with equal intervals therebetween. At loading station 3, loading platform 6 is placed on base 1.
is fixed, a carry-out table 7 is fixed on the base 1 at the carry-out station 5, and a lower die 9 is fixed to the base 1 via the holder 8 at the processing station 4.

An upper die 11 is fixed via a holder 12 at a position corresponding to the lower die 9 on an elevating table 10 which is driven up and down by an elevating drive means (not shown) above the base 1. By the lowering operation, the lower die 9 and the upper die 11 cooperate to press or forge the workpiece W. Moreover, work W
are sequentially transported from the carrying-in station 3 to the processing station 4 and from the processing station 4 to the carrying-out station 5 by the carrying device 13.

A supply means 14 is provided that extends obliquely upward from the carry-in table 6 of the carry-in station 3 towards the rear along the carry-in direction 2, and this feed means 14 is used to feed the work W on the carry-in table 6 to the processing station 4. When the next workpiece W is transported, the next workpiece W is supplied onto the carry-in table 6. Further, a carry-out chute 15 is provided that extends obliquely forward and downward from the carry-out table 7 of the carry-out station 5 along the carry-in direction 2, and the work W transferred onto the carry-out table 7 after press working is transferred to a conveyor 13.
When the next workpiece W is transported by
It is carried out to the carrying out chute 15.

Guide posts 16 are erected at each of the four corners of the base 1, and each guide post 16 is slidably connected to the lifting table 10, respectively. Therefore, the lifting platform 10 is guided by each guide post 16 and moves up and down. Further, a knockout pin 17 is provided on the base 1 at a position corresponding to the lower die 9 so as to be movable up and down.
The workpiece W on the lower die 9 is moved upward by driving the
is easily removed from the lower mold 9.

Next, while also referring to FIG.
To explain the configuration of No. 3, the conveyance device 13 has the following configuration:
A support frame 18 supported by the lifting table 10 to allow relative movement in the vertical direction with the upper mold 11; a moving frame 19 supported by the support frame 18 and capable of reciprocating back and forth along the carry-in direction 2; A pair of gripping means 20 and 21 provided on the frame 19 for gripping the workpiece W; a traveling drive means 22 provided on the support frame 18 for driving the movable frame 19; A gripping drive means 23 for driving both gripping means 20 and 21 is provided.

Brackets 24 are provided at the lower portions of both the front and rear ends of the lifting platform 10 along the carry-in direction 2,
A pair of guide tubes 25 extending vertically is fixed to each bracket 24, respectively. A guide shaft 26 is inserted into each guide tube 25 so as to be vertically movable. A guide shaft 26 protruding upward from the guide tube 25
A stopper 27 is fixed to the upper end, and when this stopper 27 comes into contact with the upper end of the guide tube 25, the downward movement of the guide shaft 26 is restricted.

A support frame 18 is provided at the lower end of each guide shaft 26.
A heel 28 is fixed to the lower surface of the support frame 18 in correspondence with each guide shaft 26. Further, at the front and back of the base 1 along the carry-in direction 2, pedestals 29 flush with the top surface of the base 1 are respectively fixed and arranged, and each heel 28 is connected to the lifting base 1.
0 comes into contact with the upper surface of the pedestal 29 when it descends. This restricts the support frame 18 from lowering downward, and as the elevator platform 10 descends, the support frame 18 and the elevator platform 10 move relative to each other in the vertical direction. A coiled spring 30 surrounding the guide shaft 26 is interposed between the support frame 18 and the bracket 24, and the spring force of this spring 30 biases the support frame 18 in the direction away from the lifting platform 10. has been done.

The support frame 18 is provided between both brackets 24 of the lifting platform 10, and is provided in the loading direction 2.
It is provided with a rectangular hole 31 that extends long along. A pair of rails 32 extending along the carry-in direction 2 is provided on the lower surface of the support frame 18, and the movable frame 19 reciprocates along the carry-in direction 2 while being suspended from these rails 32. possible.

The moving frame 19 is formed longer than the spacing between the loading station 3 and the processing station 4 and between the processing station 4 and the unloading station 5, and is provided with a rectangular operating hole 33 that extends longer than the spacing.

The pair of gripping means 20 and 21 have the same configuration, and the structure of only one gripping means 20 will be described in detail.
4, a holding cylinder 35 fixed perpendicularly to the tip of each rotating arm 34, a gripping member 36 held movably along the axis of each holding cylinder 35, and a gripping member 3
6 in the direction of protruding from the holding cylinder 35 (not shown).

Such gripping means 20, 21 are mounted on the moving frame 19 with the same spacing as between the loading station 3 and the processing station 4 and between the processing station 4 and the exporting station 5.
placed and supported. That is, moving frame 1
A pair of brackets 37 and 38 are fixed to the upper surface of the operating hole 33 along both longitudinal edges thereof, and these brackets 37 and 38 allow
A pair of rotation shafts 39, 4 extending along the carrying direction 2
0 is rotatably supported. Both gripping means 2
The base of each pivot arm 34 at 0, 21 is fixed to its pivot shaft 39, 40. Furthermore, each rotating arm 34 is fixed to the rotating shaft 39, 40 such that the corresponding pair of gripping members 36 face each other when the rotating arm 34 is suspended from the rotating shaft 39, 40. . Moreover, the rotation shafts 39 and 40 are
Each rotating arm 34 is arranged to be able to rotate within the operating hole 33.

The travel drive means 22 is a hydraulic cylinder, and the tip of its piston rod 41 is connected to the moving frame 19, and the front end along the carrying direction 2 is connected to the support frame 1.
Supported by 8. Therefore, by the telescopic operation of the travel drive means 22, the movable frame 19 moves on the rail 32.
You will be guided there and back. Also, support frame 1
A stopper 42 that can come into contact with the moving frame 19 is provided on the loading station 3 side of 8, and the travel drive means 22 is extended and the moving frame 19 travels in the opposite direction to the loading direction 2. The position of the stopper 42 is set so that the other gripping means 21 is located directly above the loading station 3 when it comes into contact with the stopper 42 .

The gripping drive means 23 is connected to each of the rotation shafts 39, 40.
It has pinions 43 and 44 respectively fixed to the pinions 43 and 44, a rack 45 that meshes with both pinions 43 and 44, and a hydraulic cylinder 46 for driving the rack 45 in the vertical direction.The hydraulic cylinder 46 is supported by the moving frame 19. be done. In this grip drive means 23, the pinions 43 and 44, that is, the two rotation shafts 39 and 40, rotate in opposite directions due to the vertical movement of the rack 45 in accordance with the expansion and contraction operation of the hydraulic cylinder 46. As a result, the rotating arms 34 of each gripping means 20, 21 are rotated in a direction toward each other or in a direction away from each other. When both rotating arms 34 rotate in a direction approaching each other, both gripping members 36
When the workpiece W is gripped by the rotating arms 34 and the rotating arms 34 are rotated in directions away from each other, both the gripping members 36
The gripping state of the workpiece W is released.

Next, to explain the operation of this embodiment, first, the movable frame 19 is at the right end position in FIG.
When pressing the workpiece W by lowering the lifting table 10, one gripping means 20 is located at a position corresponding to the processing station 4, and the other gripping means 21 is located at a position corresponding to the carrying-in station 3. In this state, both gripping means 2
0 and 21 are rotated to a position open to the side of the holder 8 and loading table 6, as shown in FIG.
Workpiece W is not gripped.

When the press working by the lower die 9 and the upper die 11 is completed, the elevating table 10 starts to move upward, and the knockout pin 17 is driven upward. When the vertical relative movement of the lifting platform 10 is completed, that is, the stopper 27 comes into contact with the upper end of the guide cylinder 25, and the support frame 18 starts to rise together with the lifting platform 10, the gripping drive means 23 is activated and both gripping means The gripping operation of 20 and 21, that is, the rotation operation of both rotation arms 34 in the direction of approaching each other is started.
Therefore, as the lifting table 10 rises, the workpiece W on the lower die 9 is gripped and lifted by one gripping means 20, and the workpiece W on the carry-in table 6 is gripped and lifted by the other gripping means 21. .

During this ascending process, the traveling drive means 22 is activated, and the movable frame 19 travels to the left end in FIG. As a result, the workpiece W gripped by one gripping means 20 is brought to a position above the carry-out table 7, and the workpiece W gripped by the other gripping means 21 is brought to a position above the lower die 9. In this state,
When the lifting table 10 starts its downward movement and descends to a position where both the workpieces W can be placed on the unloading table 7 and the lower mold 9, the gripping drive means 23 is activated and the gripping means 20, 21 are moved. The gripping state is released. Therefore, one workpiece W is placed on the carry-out table 7, and the other workpiece W is placed on the lower die 9.

When the lifting platform 10 further descends, the support frame 18 allows the relative lowering movement of the lifting platform 10, and
The lower limit position is maintained, and the travel drive means 22
As a result, the moving frame 19 moves to the right end in FIG. 1, that is, to the position shown in FIG. 3. During this time, the work W on the lower mold 9 is pressed by the lower mold 9 and the upper mold 10.

By repeating the operation of the conveyance device 13, unprocessed workpieces W are sequentially supplied onto the lower die 9, and processed workpieces W are transferred onto the carry-out table 7.
and are sequentially transported to the transport chute 15.

Further, according to this embodiment, the support frame 18
are suspended by guide shafts 26 at both ends of the lifting platform 10, and a moving frame 19 is attached to the supporting frame 18.
Since the transport device 13 is disposed so as to be movable, the transport device 13 can have sufficient strength to grip and transport a relatively heavy workpiece W.

Further, in the present invention, the structures of the gripping means 20, 21, the travel drive means 22, the gripping drive means 23, etc. are not limited to the configurations described in the above embodiments.

As described above, according to the present invention, in a press machine in which an upper die is fixed to an elevating table above a base in order to press or forge a workpiece in cooperation with a lower die fixed on a base, A carry-in station, a processing station to which the lower die is fixed, and a carry-out station are set in order on the base at equal intervals along the carry-in direction of the workpiece. A support frame extending along the upper mold is supported to allow relative movement in the vertical direction with respect to the upper mold, and the movable frame is supported by the support frame and can reciprocate back and forth along the carrying direction,
A pair of gripping means capable of gripping the workpiece are provided with an interval equal to that between the respective stations,
The support frame is provided with a traveling drive means for reciprocating the movable frame, and the movable frame is provided with a gripping drive means for driving both gripping means, so that the workpiece can be moved up and down on the lifting platform. It is possible to convey the objects sequentially according to the conditions, increasing the conveyance speed and making it possible to take up a sufficient working space near the base.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and Fig. 1 is a side view when the lifting platform is raised, and Fig. 2 is a side view of the elevating platform.
The line arrow view and FIG. 3 are side views when the elevator platform is lowered. DESCRIPTION OF SYMBOLS 1...Base, 2...Carry-in direction, 3...Carry-in station, 4...Processing station, 5...Carry-out station, 9...Lower die, 10...Elevating table, 11...Upper die, 13
...Transport device, 18...Support frame, 19...Movement frame, 20, 21...Gripping means, 22...Traveling drive means, 23...Gripping drive means, W...Workpiece.

Claims (1)

[Claims] 1. In a press machine in which an upper die is fixed to an elevating table above the base in order to press or forge a workpiece in cooperation with a lower die fixed on the base, the workpiece is placed on the base. A loading station, a processing station to which the lower mold is fixed, and an unloading station are set in order along the loading direction at equal intervals, and the lifting platform has a support frame extending along the loading direction, which is connected to the upper mold. The movable frame is supported by the support frame to allow relative movement in the vertical direction, and is supported by the support frame and is capable of reciprocating back and forth along the carry-in direction. The support frame is provided with a travel drive means for reciprocating the movable frame, and the movable frame is provided with a grip drive means for driving both the grip means. A conveyance device in a press machine characterized by the following.