JPH039861Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a die exchange mechanism in a press machine that is configured to automatically exchange various dies used in the press machine with other dies.

BACKGROUND ART Conventionally, this type of die exchange mechanism has been equipped with a rail laid on the head of a press device and a rail placed outside the press device. It is known that the die is mounted so as to be movable up and down on the floor and on the rails laid on the head of the press machine, and is equipped with a bolster on which the die is placed so that it can be moved manually along each rail ( Jitsukai Showa 54-82038
issue).

Although this die exchange mechanism is preferable because it allows the die to be mechanically raised and lowered from the floor to the head of the press, the bolster must be moved manually to move the die into and out of the head of the press. If the die is heavy, considerable labor is required.

In order to eliminate this drawback, it is sufficient to configure the system so that the bolster can be moved in and out mechanically.

The drive mechanism consists of attaching a rack bar to the side of the bolster, placing another rack bar with its tooth surfaces facing each other, engaging the rack bars to assemble a pinion, and connecting this pinion to the drive cylinder. A rod that is rotatably attached to the tip of the rod and moves in the horizontal direction (Jitsukasho
51-10684). In addition, a die exchange table is placed close to the press machine, a feed screw rotated by a drive motor is provided on the base plate of the die exchange table, and a hook that moves along the axis of this feed screw is screwed onto the base plate of the die exchange table. The hook runs the carrier table on which the die is placed (Utility Model Application No. 131924/1983)
There is also.

Problems to be Solved by the Invention However, in the former drive mechanism, the load of the die placed on the bolster is directly applied to the pinion, so when the die becomes heavy, the pinion and rack bar are Moreover, there is a risk that the bolster cannot be moved smoothly by the drive cylinder.

In the latter case, the axis of the feed screw is arranged in the same direction as the traveling direction of the carrier stand, and in addition to the length of the axis of the feed screw depending on the moving distance of the carrier stand, the length of the axis of the feed screw is determined according to the moving distance of the carrier stand. Since the retreat stop width and the space for mounting the bearing of the feed screw must be provided on the plate surface of the die exchange table, a large die exchange table must be placed near the press device.

This invention allows the die to be moved up and down mechanically between the floor and the bolster surface, allows the die to be moved in and out of the bolster surface without mechanical difficulty, and is improved so that it can be installed in a small amount of space. The purpose of the present invention is to provide a die exchange mechanism for a press machine.

Means for Solving the Problems The die exchange mechanism in the press device according to the present invention includes a die lifter that is placed adjacent to the bolster of the press device and raises and lowers the die plate on which the die is mounted between the floor side position and the bolster surface. A pair of left and right die carriers are arranged so as to bridge the bolster surface, and a rack gear is formed on the side of each die carrier. A pinion gear that meshes with each rack gear is supported on a drive shaft, and a drive chain is arranged to span between the axes of the drive shafts so as to intersect with a line connecting the centers of each drive shaft. It is constructed by rotating the drive shaft in the opposite direction.

Function The die exchange mechanism in this press equipment not only allows the die placed on the die plate to be raised and lowered to the floor and bolster surface by driving the die lifter, but also allows the die plate on which the die is mounted to be hooked by the die carrier. The die can also be moved in and out of the bolster surface by sliding it.
The die carrier meshes a rack gear formed on the side with a pinion gear, and this pinion gear is placed on the side of the die carrier so as to be rotated by a drive shaft, so that the load of the die mounted on the die plate is transferred to the rack gear and pinion gear. The die plate can be smoothly slid and fed by preventing direct contact with the die plate. In addition, the pinion gear is rotated by intersecting a line connecting the centers of each drive shaft with a drive chain that is placed across the axes of each drive shaft that supports the pinion gear, and rotating each drive shaft in the opposite direction. Therefore, it is sufficient for the die lifter to have at least a space that can receive the die plate.

Embodiments The following description will be made with reference to the accompanying drawings.

This die changing device is arranged adjacent to the bolster 1 of the press device, as shown in FIG. The die changing device includes a die lifter 3 that supports dies A, B, and C on a die plate 2 as shown in FIG. The die lifter 3 has brackets 3a, 3b which project cylinder rods 5a, 6a of the drive cylinders 5, 6 mounted on the base surface 4a of the fuselage 4 to the side from the die lifter 3.
By being connected to the die plate 2, it is possible to move up and down, and in the raised position, the plane of the bolster 1 and the mounting surface of the die plate 2 are horizontally aligned. A pair of left and right guide rails 7, 8 having grooves in the longitudinal direction are disposed on the base surface 4a of the fuselage 4 with a length spanning the plane of the bolster 1, and each guide rail 7, 8 has a dovetail groove. A matching die carrier 9, 10 is slidably attached. Each die carrier 9, 10 has a locking hook 9a, 10a for the die plate 2 projecting inwardly on the end side near the bolster 1, and a lock gear 9b, on the outer side surface along the longitudinal direction. 10b is formed. Each of these rack gears 9b, 10b includes pinion gears 11, 12.
are arranged in mesh. Each pinion gear 1
1 and 12 are fixed to the upper ends of drive shafts 13 and 14 which are rotatably mounted with bearings in the vertical direction of the fuselage 4, and when these drive shafts 13 and 14 rotate in opposite directions, the die carriers 9 and 10 are moved in the same direction. It is configured to slide in the direction. The drive shafts 13 and 14 can be rotated by a drive force mechanism shown in FIG. 3, and the mechanism is configured to rotate the chain 15 by a drive cylinder 16. The chain 15 is suspended between a sprocket 17 mounted on the fuselage 4 and a sprocket 18 mounted on the axis of the drive shaft 14, and the striations of the chain 15 intersect with the connections of the respective drive shafts 13 and 14. is disposed in sliding contact with a sprocket 19 mounted on the axis of the drive shaft 13. The drive cylinder 16 is a cylinder rod 16a.
The tip of the cylinder is fixed to the body 4 with a bracket 20, and the cylinder body is arranged so as to be movable along a guide rail 22 until it comes into contact with a stopper 21. Each end of the chain 15 located in a straight line is connected to this cylinder body, and the cylinder body is attached so that the chain 15 can be rotated left and right by the operation of the drive cylinder 16, and the drive shafts 13 and 14 can be rotated in opposite directions. There is.

As shown in FIG. 1, cutouts 2a and 2b are formed in the die plate 2 to engage latching hooks 9a and 10a protruding from the die carriers 9 and 10. Further, an air floating roller 23 is provided on the plane of the bolster 1 to allow the die plate 2 to slide smoothly, and a stopper 24 is provided to regulate the feeding position of the die plate 2.

In the die exchange mechanism configured in this way, when the die lifter 3 is in the lowered position, the drive cylinder 1
6 to extend the stroke and run the main body, for example, in the X direction shown in FIG.
By reversely rotating the drive shafts 13 and 14 through the pinion gears 11 and 12 and the rack gear 9,
Move and place the die carriers 9 and 10 onto the base surface 4a of the fuselage 4 using steps b and 10b. On the other hand, the die lifter 3 is loaded with dies A, B, and C, which are placed on the die plate 2 at a lowered position near the bottom surface, as shown in FIG. In this state, the drive cylinders 5 and 6 are moved to reduce their strokes and the die lifter 3 is moved upward,
When the die mounting surface of the die lifter 3 is aligned with the base surface 4a of the machine body 4, the drive cylinder 5,
Stop the operation of 6. At the stop position, the latch hooks 9 of the die carriers 9, 10, which have been retracted in advance,
a, 10a engage with the notches 2a, 2b of the die plate 2. In this state, when the drive cylinder 16 is moved to reduce its stroke, the chain 15 rotates in the opposite direction. Therefore, by rotating the drive shafts 13 and 14 in opposite directions, the pinion gears 11 and 12 and the rack gears 9b and 10b are connected to the die carriers 9 and 10. can be synchronously moved toward the bolster 1.
At this time, the hooks 9a, 10a are engaged with the notches 2a, 2b of the die plate 2, so that the die plate 2 can be fed onto the plane of the bolster 1 together with the dies A, B, C. When this feeding is completed, the die lifter 3 moves downward and mounts the next die until the above-mentioned dies A, B, and C become unnecessary. In addition, when the die sent in by the above-mentioned operation is no longer needed, the die carriers 9 and 10 are brought out as they are retreated to the machine body 4 as explained at the beginning, and the die is placed on the upper stage of the die lifter 3. It can be moved to the surface.

Effects of the invention As described above, according to the die exchange mechanism of the press device according to the present invention, it is possible to mechanically smoothly move the die up and down with respect to the bolster surface and to take it in and out. This allows them to be installed adjacent to each other in a relatively small amount of space.

[Brief explanation of drawings]

FIG. 1 is a plan view showing a die exchange mechanism according to the present invention, FIG. 2 is a partially cutaway front view of the same mechanism, and FIG. 3 is an explanatory diagram showing a driving force mechanism portion of the mechanism. 1: Bolster, 2: Die plate, 3: Die lifter, 4: Airframe, 4a: Base surface, 9, 1
0: Die carrier, 9b, 10b: Rack gear,
11, 12: Pinion gear, 13, 14: Drive shaft, 15: Chain, 16: Drive cylinder, 16
a: cylinder rod, 18, 19: sprocket.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A die lifter is disposed adjacent to the bolster of the press equipment to raise and lower the die plate on which the die is mounted between the floor side position and the bolster surface, and the die lifter is raised. A pair of left and right die carriers, which are hooked onto the die plate and slid onto the bolster surface, are arranged so as to bridge the bolster surface, and a rack gear is formed on the side of each die carrier, and a pinion gear that meshes with each of the rack gears is formed. Along with being supported on the drive shaft,
A drive chain is arranged across the axes of the drive shafts so as to intersect a line connecting the centers of the drive shafts, and each drive shaft is configured to rotate in opposite directions as the drive chain moves. Die exchange mechanism in press equipment. (2) The die changing mechanism according to claim 1, wherein the end of the drive chain is connected to a movable cylinder body of a drive cylinder having a fixed rod tip.