JPH0117385Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bar lifter device for a transfer feeder used in a transfer press.

The transfer feeder in the transfer press is configured as shown in Fig. 1, and two bars a and b equipped with fingers are attached to upper and lower molds c and d.
on both sides in the front and back direction, and the bolster e and slide f
It is located between the two molds, and moves three-dimensionally at this position to sequentially transport the workpieces formed by the upper and lower molds c and d to the processing line.

In such a transfer feeder, when replacing the transfer press molds c and d,
The bars a and b get in the way. For this reason, the two bars a and b of the transfer feeder can be cut at the inner parts of the left and right uprights, and in order to prevent this part, that is, the center bar, from getting in the way when replacing the mold, it is shown in Figure 1. As shown by the arrow and the chain line, after moving further in the front-back direction from the forced unclamping position, it rises.

Conventional transfer feeders have a structure in which a cylinder device is used to move the bar back and forth and raise and lower the bar, resulting in a problem that the structure is large-scale and expensive.

The present invention has been made in view of the above, and aims to provide a bar lifter device for a transfer feeder that has a simple structure and can move the bar up and down in a labor-saving manner without using a cylinder device. It is something.

Embodiments of the present invention will be described below based on FIG. 2 and subsequent figures.

In the figure, 1 and 2 are the front left and right uprights, 3 is the front bar of the two front and rear transfer feeder bars, and 3a is the central bar that can be cut between the left and right uprights 1 and 2. It is.

The transfer feeder has two front and rear bars that work together to act as a feeder, and is connected to a drive machine (not shown).

The present invention is a bar lifter device for raising and lowering the center bar of each of the two transfer bars, and has a symmetrical structure from front to back, so the front transfer bar will be explained as shown in the drawings.

Rails 4 and 5 are installed inside the left and right uprights 1 and 2.
are fixed in the vertical direction, and each rail 4,
Elevating and lowering frames 6 and 7 are engaged with 5 by roller engagement so as to be able to move up and down. Bar receivers 8 and 9 are provided at the lower ends of both lifting frames 6 and 7 so as to be slidable in the front and rear directions and are biased rearward by a spring 10, that is, toward the inside of the press machine. The bar receivers 8 and 9 are provided in a position where they support the central bar 3a of the transfer bar 3 in a forced unclamped state, while being biased rearward by a spring. Further, the bar receivers 8 and 9 can be moved in the forward direction, that is, in a stroke toward the outside of the press machine, to a position where they do not interfere with the slide when going up and down.

A chain 11 is connected to the tip of the frame body of each of the bar receivers 8 and 9 in the spring biasing direction.
1 is a lifting frame 6, 7, and is wound around a sprocket 12 provided on the opposite side of the spring biasing direction of the bar receivers 8, 9, and is further attached to an idle sprocket 13 and a rail 4, which are provided on the lifting frames 6, 7. 5 is wound around a drive sprocket 14 provided at the upper end of the shaft. A weight 15 is connected to the other end of the chain 11. A guide 16 guides the weight 15 and is fixed to the uprights 1 and 2. Each of the bar receivers 8 and 9 is mounted at a position where it will not interfere with the rails 4 and 5 when the elevating frames 6 and 7 are raised and lowered. The drive sprocket 14 is fixed to a drive shaft 17 extending over the upper ends of the left and right rails 4 and 5, and this drive shaft 17 is connected to a motor 18.

In the above configuration, when the drive shaft 17 is reversed and the chain 11 is loosened against the weight 15, the left and right lifting frames 6, 7 descend by their own weight along the rails 4, 5 to predetermined positions, and then the chain 11 is loosened against the weight 15. When 11 is loosened, the bar receivers 8 and 9 are urged by the springs 10 and 10 and move toward the inside of the press machine, that is, toward the front transfer bar 3. Then, it stops at a position corresponding to the forced unclamping position of the transfer bar 3.

When replacing the mold of the press machine, the transfer bar 3 is forcibly unclamped and the central bar 3a is separated at that position. In this way, this central bar 3a is delivered as is to the bar receivers 8, 9. At this time, the protrusion 19 protruding from the upper surface of the bar receivers 8, 9 engages with the recess provided on the lower surface of the central bar 3a.

In the above state, the drive shaft 17 is rotated forward and the chain 11 is
When the bar receivers 8 and 9 are driven in the tensioning direction, first, the bar receivers 8 and 9 move away from the transfer bar 3 toward the front of the press machine against the spring 10, and then the lifting frames 6 and 7 rise, and the center bar 3a are raised in parallel with the bar receivers 8 and 9. At this time, the weight 15 moves down along the guide 16. Therefore, the power of the motor 18 that drives the drive shaft 17 is reduced due to the weight of the weight 15.

In the above embodiment, only the device for lifting and lowering the transfer bar on the front side of the press machine has been described, but the device for lifting and lowering the transfer bar on the rear side of the press machine is also symmetrical and has the same structure.

To connect the central bar 3a, the above operations are performed in reverse. In this way, the lift frames 6 and 7 descend by their own weight, and after the lift frames 6 and 7 have descended to the lower end,
Further loosening the chain 11 will cause the bar receivers 8 and 9 to
is pushed out by the spring 10, and the central bar 3a is positioned at the feeder connection position.

Since the present invention is as described above, the bar receiver 8,
9 is moved in the front and back direction by the biasing force of the spring 10 and the tensile force of the chain 11, and the lifting and lowering is performed by lifting by the chain 11 and the weight of the bar receivers 8 and 9, thereby connecting the transfer bars. , movement to the release position and the elevating position, and elevating and lowering can be performed by a single driving source, and can be operated with a simple configuration. Further, the lifting and lowering of the bar receivers 8 and 9 can be supported by the weight 15, and the power of the drive source for driving the chain 11 can be reduced.

[Brief explanation of the drawing]

Figure 1 is a side view of the transfer press, Figure 2 and the following figures show embodiments of the present invention, Figure 2 is a plan view, Figure 3 is a front view, and Figure 4 is a line alignment with Figure 3. 5 is a cross-sectional view taken along the - line in FIG. 4. 1 and 2 are uprights, 3 is transfer bar,
3a is a center bar, 4 and 5 are rails, 6 and 7 are lifting frames, 8 and 9 are bar supports, 10 is a spring, 11 is a chain, 12 is a sprocket, 14 is a drive sprocket, and 15 is a weight.

Claims (1)

[Scope of utility model registration request] In a transfer press having a transfer feeder which is made up of two transfer bars located on both the front and rear sides of a mold and whose central part can be cut, uprights 1 and 2 on each of the front and rear left and right sides are used.
, rails 4 and 5 corresponding to the left and right are provided in the vertical direction, and elevating frames 6 and 7 are installed on each rail 4 and 5.
bar supports 8 and 9 are provided on the elevating frames 6 and 7 with spring biasing toward the inside of the press machine. A chain 11 is connected to the tip side in the spring biasing direction, and this chain 11 is connected to a sprocket 12 provided on the lifting frames 6, 7 at a position opposite to the spring biasing direction of the bar receivers 8, 9, and the rail. A bar lifter device for a transfer feeder, characterized in that the upper ends of the chain 11 are wound around drive sprockets 14, 14 which are driven in left and right interlocking manner, and a weight 15 is connected to the other end of the chain 11.