JPS6245781Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a feed bar coupling device in a transfer press.

Transfer presses are often used in which a large number of molds are mounted on a moving bolster and then transported out of the press to be replaced. In this case, since the fingers attached to the feed bar are replaced together with the mold, the feed bar is of a type that can be divided into a fixed side and a movable side, and a connecting device is provided between these sides. In conventional coupling devices, a hole is provided in the fixed feed bar fixed to the press, and a pin is provided in the movable feed bar to fit into the hole, and when the moving bolster is to be carried out, the movable feed bar is lifted and removed from the fixed feed bar. ing. In this type, the connection of the feed bar is based only on the fit between the pin and the hole, so the connection force is weak, and the movable feed bar easily rotates around its axis while the press is running, and a lift is required to remove the pin from the hole. There were drawbacks such as the large amount and difficulty in removing it.

An object of the present invention is to eliminate these drawbacks and provide a feed bar coupling device that has strong coupling, a small lift amount, and is easy to disconnect.
Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, transfer devices 3 and 4 are provided on both left and right sides of a bed 2 of a press 1, and a moving bolster 5 is fixed on the bed 2. Feed bars 7 and 8 are provided at the upper portions of both the front and rear sides of the moving bolster 5 and are connected to the receiving members 6 of the transfer devices 3 and 4. When the moving bolster 5 is taken out for mold replacement,
The movable feed bar 8, which has been disconnected from the fixed feed bar 7 connected to the receiving member 6, is held on the moving bolster 5 and carried out together.
Therefore, feed bar coupling devices are provided at four connecting portions of the stationary feed bar 7 and the movable feed bar 8, indicated by arrows A.

In FIGS. 2, 3, and 4, a cylinder 9 is installed at the end of the stationary feed bar 7 so as to be slidable in the longitudinal direction thereof. Pressure oil is supplied from the port 10 to the tip of the cylinder 9.
moves forward by a distance d, the fixed side feed bar 7 moves forward by a distance d.
protrudes from the end face of When the pressure oil from the port 10 is discharged, it is moved back by the biasing force of the spring 11.

A notch 12 is formed at the tip of the cylinder 9 by cutting off the circular upper surface into a half-moon shape. A piston 13 fits into the cylinder 9, and when pressure oil is supplied from a port 18, it retreats, and when it is discharged, it moves forward by the biasing force of a spring 19. The piston 13 is provided with a clamp rod 14 extending past the tip of the cylinder 9, and a piston rod 16 extending past the cylinder 9 in the opposite direction. At the tip of the clamp rod 14, there is a head 1 having a T-shaped longitudinal section and a certain width in the horizontal direction.
5 is provided. The tip of the piston rod 16 fits into a hole in the main body of the stationary feed bar 7, and a rotation stopper 17 is provided between them. A recess 20 into which the tip of the cylinder 9 fits is provided on the end surface of the movable feed bar 8 that faces the end surface of the fixed feed bar 7. Recess 20
has a circular shape with a half-moon cutout at the top, and the cylinder 9
The tip of the is adapted to fit. In addition, the end of the movable feed bar 8 has a T-shaped longitudinal section.
Horizontal grooves 21 with T-shaped legs opening at the end surfaces are provided on both sides in the width direction. Groove 21
A head 15 of a clamp rod 14 is fitted in the center of the clamp rod. The distance a between the head 15 and the groove 21 is smaller than the distance b between the piston rod 16 and the fixed feed bar 7. Further, the distance c between the bottom of the recess 20 and the tip of the retracted cylinder 9 is equal to or slightly larger than the stroke d of the piston 13.

Next, we will discuss the effect. 1, 2, and 5, the movable feed bar 8 is held by the moving bolster 5 and is mounted on the bed 2 of the press 1.
will be transported to. At this time, since pressure oil is not supplied to the ports 10 and 18 of the stationary feed bar 7, the cylinder 9 is moved backward by the spring 11, and the head 15 is moved forward by the spring 19 via the piston 13 and the clamp rod 14. Therefore, the head 15 and the groove 21 are engaged with each other from a direction perpendicular to the plane of the drawing as shown in FIG. 2 with a distance a between them. Next, when pressure oil is supplied from port 10, cylinder 9 springs 11
is compressed and moved forward, and its tip fits into the recess 20 of the movable feed bar 8. The head 15 moves forward together with the cylinder 9, but after contacting the bottom of the T-shaped groove 21, the spring 19 is compressed to absorb the movement of the cylinder 9. Subsequently, when pressure oil is supplied from the port 18, the piston 13 retreats and the head 15
is pressed against the side surface of the groove 21 and locked.

As a result, the movable feed bar 8 is moved to the head 1.
It is locked in the longitudinal direction by the tensile force of 5 and around the axis by the recess 20 and the notch 12 of the cylinder 9. Since the cylinder 9 is prevented from rotating by a metal fitting screwed into the port 18, and the head 15 is prevented from rotating by a rotation stopper 17, the fixed side feed bar 7 is prevented from rotating.
The positional relationship around the axis between the feed bar 8 and the movable feed bar 8 is maintained correctly, the above operations are performed smoothly, and a strong connection is achieved. The connection can be canceled by reversing the above order. Because of the relationships a<b and c>d, there is no strain in the longitudinal direction of the feed bars 7 and 8, and no movement occurs after they are connected.

As is clear from the above explanation, according to the present invention, the connection is strong, no unreasonable force is applied to each part, connection and release are easy, automation is easy, and the moving feed bar can be easily lifted. The practical effects and advantages are extremely large, such as being able to minimize the amount of unnecessary lift for holding.

[Brief explanation of the drawing]

Figure 1 is a plan view of the main parts of the transfer press, Figure 2 is a vertical sectional view of the embodiment, and Figure 3 is the -
A cross-sectional view, Figure 4 is a - cross-sectional view of Figure 2, and Figure 5 is a cross-sectional view of Figure 2.
The figure is a longitudinal sectional view showing a connected state. 1 is a press, 2 is a bed, 3 is a transfer device, 4 is a transfer device, 5 is a moving bolster, 6 is a receiving member, 7 is a fixed side feed bar, 8
is the moving side feed bar, 9 is the cylinder, 10 is the port, 11 is the spring, 12 is the notch, 13 is the piston, 14 is the clamp rod, 15 is the head, 16
17 is a piston rod, 17 is a rotation stopper, 18 is a port, 19 is a spring, 20 is a recess, and 21 is a groove.

Claims (1)

[Scope of utility model registration request] In a coupling device that connects both ends of the movable feed bar 8 of a transfer press and the ends of the stationary feed bar 7 that abut against these ends, a coupling device is installed inside the end of the stationary feed bar 7 and is directed toward the end surface. A cylinder 9 is provided on the end surface of the movable feed bar 8, and a cylinder 9 is provided on the end surface of the movable feed bar 8.
A recess 20 that fits the protruding tip of the cylinder 9, and a recess 20 that is provided to fit the cylinder 9, moves forward with the spring 19 toward the tip of the cylinder 9, and retreats with hydraulic pressure, penetrates the cylinder 9 toward the tip, and protrudes. The piston 13 has a head 15 having a T-shaped longitudinal section at the tip of the piston rod, and the piston 13 is provided horizontally through the end of the movable feed bar 8.
A feed bar coupling device characterized in that it comprises a groove 21 for engaging a head 15 of the feed bar.