JP2567686Y2 - Feed bar lifting device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lift device for raising a feed bar of a press machine at the time of changing a die.

[0002]

2. Description of the Related Art In a press machine equipped with a feed bar, in order to enable a mold to be carried into and out of the press machine at the time of mold change, conventionally, in a press machine in which a bolster is a moving bolster, a feed bar is provided. The center bar is taken out to the mold changing position by the moving bolster when changing the mold, and when the feed bar is a single continuous bar, the operator can change the mold when changing the mold. Manually removes and attaches the feed bar, thereby performing a mold changing operation.

[0003]

[Problem to be solved by the invention] In the former prior art,
The feed bar must be able to be divided into three parts.
There is a problem that the structure is complicated and the whole device becomes large, and in the latter conventional technology, there is a problem that the work efficiency is poor because a manual operation by an operator is required.
.

SUMMARY OF THE INVENTION An object of the present invention is to provide a feed bar lift device which does not require the work of attaching and detaching the feed bar at the time of mold replacement, and which can be constructed simply with a small number of parts.

[0005]

According to the feed bar lifting device of the present invention, the feed bar is slid forward and backward by a liner member provided below the feed bar with respect to a receiving member for receiving the feed bar. The cylinder body of the cylinder is connected to one of the feed bar and the liner member, and the piston rod of this cylinder is connected to the other, and the direction of expansion and contraction of this piston rod is vertical. It is characterized by the following.

[0006]

Since the feed bar and the liner member are connected via the cylinder body of the cylinder and the piston rod, when the piston rod is moved up and down with respect to the cylinder body, the feed bar becomes the receiving member and the liner member. By moving the feed bar up and down to raise the feed bar, it is possible to carry the work into and out of the press machine by passing the die under the feed bar.

In the above description, when the amount of rise of the feed bar is small, the work of loading and unloading the mold passing below the feed bar is performed on the lower mold, and the amount of rise of the feed bar is increased. By doing so, loading and unloading operations can be performed for both the upper mold and the lower mold of the mold.

When there are two feed bars before and after,
When the mold loading and unloading work is performed only to the front of the press machine, only the front feed bar can be moved up and down by the cylinder, and the mold loading and unloading work is performed in the front and rear direction of the press machine. When it is done through the work,
Two feed bars can be moved up and down by a cylinder.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a front view of a press machine 1 provided with the apparatus according to the present embodiment. A feed bar 4 is provided between a slide 2 and a bolster 3, and the feed bar 4 is, as shown in FIG. There is a book. These feed bars 4
As shown in FIG. 1, the receiving members 7 of the clamp units 5 and 6 attached to the left and right sides of the press machine 1 are received by the driving force transmitted from the clamp units 5 and 6, respectively.
Is driven, the two feed bars 4 perform ascending, descending, approaching, and separating movements for material conveyance.

A liner member 8 is provided below the feed bar 4 at the position of the receiving member 7, and the liner member 8 is slidable with respect to the receiving member 7 in the left-right direction in FIG. The feed bar 4 is slidable by the liner member 8 in the same direction as the receiving member 7, that is, in the forward and backward directions. An advance unit 9 is provided adjacent to the clamp unit 5.
Each feed bar 4 is slid with respect to the receiving member 7 by the liner member 8 by the driving force transmitted from the liner, and moves forward and backward for material conveyance.

FIG. 3 shows a concrete structure of the receiving member 7 of the feed bar 4 'on the front side of the two feed bars 4 provided on the front and rear of the press machine 1. A stopper 10 is attached to the upper end of the receiving member 7, and the stopper 10 prevents the liner member 8 from coming off. A bush 11 is vertically inserted into the feed bar 4 '.
Is connected to the feed bar 4 'by a connecting member 12. An air cylinder 14 is disposed downward on a flange 11A at the upper end of the bush 11 via a spacer 13. The cylinder body 14A of the air cylinder 14 is connected to the spacer 13 and the bush 11 by bolts 15.

The bush 11 and the spacer 13 are formed with holes 11A and 13A penetrating vertically, and these holes 11A and 13A are formed.
Piston rod 14 extending downward to air cylinder 14
B and the connecting member 16 are inserted, and the piston rod 14B and the connecting member 16 are connected by the threaded end 14C of the piston rod 14B and the nut 17. A lower end of the connecting member 16 protrudes from the lower surface of the bush 11 and the feed bar 4 ', and a lower end of the connecting member 16 is formed with a flange portion 16A fitted into a concave portion 8A of the lower surface of the liner member 8. Are connected to the liner member 8 by bolts 18.

As described above, the feed bar 4 'and the liner member 8 are connected via the bush 11, the spacer 13, the air cylinder 14, and the connecting member 16, and the cylinder body 14A of the air cylinder 14 is connected via the spacer 13, the bush 11. The piston rod is connected to the feed bar 4 ′ and is vertically expandable and contractible with respect to the cylinder body 14 A.
14B is connected to the liner member 8 via the connecting member 16. Since the feed bar 4 'is only placed on the liner member 8, when the piston rod 14B is extended and actuated with respect to the cylinder body 14A as shown in FIG. 4, the feed bar 4' exerts an upward force acting on the cylinder body 14A. As a result, the piston rod 14B rises by the extension stroke of the piston rod 14B.

As shown in FIG. 1, two air cylinders 14 are provided on each side of the feed bar 4 'in the longitudinal direction. The air cylinders 14 can be raised to a certain height while maintaining a horizontal state. Is available. The number of air cylinders 14 is not limited to this, and the feed bar 4 '
May be provided on both sides in the longitudinal direction.

FIG. 2 shows the press machine 1 when the mold is replaced. At the time of mold exchange, the slide 2 is stopped at the top dead center, and the two feed bars 4 are at the midpoint between the advance position and the retreat position by the advance unit 9, and the ascending position and the approach position by the clamp units 5 and 6. Stopped at. In order to carry out the mold exchanging operation, first, the two feed bars 4 are separated as shown by A by driving the clamp units 5 and 6 by manual operation, and then the front feed bar 4 'is extended by the extension of the air cylinder 14. It is raised as shown in B by operation. Thereafter, the used lower mold 19 is passed under the feed bar 4 'by a die lifter or the like, carried out to the front side of the press machine 1 as shown by C, and a new lower mold is similarly moved under the feed bar 4'. , And is carried into the press machine and set at a predetermined position. Next, the feed bar 4 'is lowered by the contraction operation of the air cylinder 14, and the two feed bars 4 are returned to the previous position by driving the clamp units 5, 6 by manual operation.

As described above, according to the present embodiment, the feed bar 4 'is raised by the air cylinder 14 when the mold is replaced, so that the mold replacement operation can be performed without removing the feed bar 4 from the press machine 1. Since the work of attaching and detaching the feed bar 4 can be omitted, the work efficiency is improved. Further, the feed bar 4 'and the liner member 8 which is slidable with respect to the receiving member 7 are connected to the feed bar 4' by the air cylinder 14 in which the piston rod 14B contracts vertically with respect to the cylinder body 14A. It is only necessary to connect them, so that the configuration can be made with a small number of parts, the whole apparatus can be downsized, and the structure can be simplified.

The air cylinder 14 is provided at a position of the receiving member 7 for receiving the feed bar 8 as shown in FIG. 1, and this position is disengaged from the carry-out and carry-in path of the lower mold 19 at the time of mold replacement. Therefore, the loading and unloading work of the lower mold 19 can be performed without any trouble, and the lower mold having a large dimension in the left-right direction can be replaced as required.

If the rising stroke of the feed bar 4 'by the air cylinder 14 is increased, both the upper and lower dies, which are vertically stacked, can pass under the feed bar 4' to exchange the dies. .

In the above-described embodiment, of the two feed bars 4, only the front feed bar 4 'is raised, but if both the feed bars 4 are raised, the gold becomes higher. The mold changing operation can be performed as a passing operation of the press machine 1 in the front-rear direction.

Further, in the above embodiment, the feed bar 4 is of a type which transports the material by three-dimensionally moving. However, the feed bar lift device according to the present invention transports the material by two-dimensionally moving. It can also be applied to the feed bar.

Further, in the above embodiment, the cylinder body 14A of the air cylinder 14 is connected to the feed bar 4 ', and the piston rod 14B is connected to the liner member 8. However, this may be reversed. The cylinder may be a hydraulic cylinder instead of an air cylinder.

[0022]

According to the present invention, it is not necessary to perform the work of attaching and detaching the feed bar at the time of mold replacement, and it is possible to configure with a small number of parts, thereby achieving simplification of the structure.

[Brief description of the drawings]

FIG. 1 is a front view of a press machine including a lift device according to an embodiment of the present invention.

FIG. 2 is a side view of the press machine showing a moving state of a feed bar at the time of mold replacement.

FIG. 3 is a sectional view showing a structure of the lift device shown in FIG. 1;

FIG. 4 is a view similar to FIG. 3, showing a state in which a feed bar is raised.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Press machine 4, 4 'Feed bar 5, 6 Clamp unit 7 Receiving member 8 Liner member 9 Advance unit 14 Air cylinder 14A Cylinder body 14B Piston rod 19 Lower mold

Claims (1)

(57) [Scope of request for utility model registration] 1. A feed bar used for mold changing.
In the lift device, a liner member is provided below the feed bar, and the liner member allows the feed bar to move forward and backward with respect to a receiving member that receives the feed bar. A feeder, wherein a cylinder body of a cylinder is connected to one of a bar and the liner member, and a piston rod of the cylinder which is vertically expandable and contractible with respect to the cylinder body is connected to the other. Bar lift equipment.