JP2852631B2 - Material return prevention device for material feeder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for positioning a material in the width direction when a coiled material is inserted into a material feeding device of a press machine and for preventing the material from returning.

[0002]

2. Description of the Related Art In a material feeding device such as a roll feeder or a leveler feeder for feeding a coiled material to a press machine, positioning of a material to be fed in a width direction according to a mold attached to the press machine. To do this, the feed rolls and work rolls of the material feeder must be released to free the material.

However, in order to intermittently feed a material in accordance with a pressing operation, a loop portion as a material stock is often provided in front of a material feeding device. The material may return to the loop portion due to its own weight. In order to prevent this, a return prevention device different from the feed roll and the work roll is required. However, in the method of simply clamping the material by the back-out preventing device, the material does not return, but cannot be moved in the width direction of the material at the same time, and positioning of the material in the width direction becomes impossible.

FIGS. 3 and 4 show a concrete prior art material feeding apparatus. In order to feed the material W by the material feeder 1 to a press machine (not shown) installed on the left side of FIG. 3, the released upper feed roll 7 and lower feed roll 8 and upper chute 9 and lower chute 9 are released. Side shoot 10
The width direction of the material W is passed through the side guide roll 6,
Guided by 6.

The upper roll 2 provided with a one-way clutch provided on the non-rotatable shaft 5 so as to be rotatable only in the feed direction, that is, the upper roll 2 for preventing backward movement which rotates only in the feed direction, is used as a clamping spring At 4, the material W is urged toward the lower roll 3 of the counterpart, the material W is clamped between the upper roll 2 and the lower roll 3, and the one-way clutch provided on the upper roll 2 prevents the material W from returning. In this prior art, springs 5A and 5A are provided on both sides of the upper roll 2 so that the upper roll 2 can move in the axial direction, that is, in the width direction of the material.

[0006]

In the case of a back-return preventing device using a one-way clutch which can freely move in the width direction of a coiled material, a side guide roll is provided every time the passed material has a displacement in the width direction. Corrects the position of the material,
If the position of the one-way clutch changes after the position adjustment of the material in the width direction, and the displacement in the width direction of the material continues to occur in the same direction, it will hit one end and will be manually centered. I need to put it back.

Further, in the method of solving the above-mentioned problem by inserting a centering spring on both sides of the one-way clutch so that the one-way clutch is always arranged at the center, the width of the material is adjusted by the stroke of the spring. Limited range. Further, since the material must be moved in the width direction by overcoming the reaction force of the spring, the edge is damaged depending on the material.

[0008]

According to the present invention, in order to solve the above-mentioned problems, a material can be clamped and released below a feed line of a material and above a material, and can be freely rotated. The roll is arranged such that the material feeding direction and the center axis of the roll are in the same direction.

[0009]

When the upper and lower rolls are clamped when positioning the material in the width direction, the material can be moved in the width direction by rotating the upper and lower rolls because the axial direction of the upper and lower rolls is the feed direction. Because of the direction, the material cannot be turned back unless the upper and lower rolls and the material slide. Since the force for moving the material in the width direction is small, the edge of the material is not damaged.

[0010]

1 and 2 show an embodiment of the present invention. FIG.
In order to feed the coiled material W by the material feeding device 11 to a press machine (not shown) installed on the left side of
The material W is passed between the released upper feed roll 7 and the lower feed roll 8 and between the upper chute 9 and the lower chute 10, and the width direction of the material W is guided by the side guide rolls 6.

The fixed roll 12 and the movable roll 13 are arranged at right angles to the upper and lower feed rolls 7 and 8. The movable roll 13 has rolling bearings 20, 20 whose inner and outer diameters are fitted to the pin 14 and the movable roll 13, sandwiched by spacers 19, and the lever 16 connecting the pins 14 supports the fulcrum 1.
8. Lever 1
6 is rotated downward by the air cylinder 15 and upward by the clamp spring 17.

When the material W is passed, the piston 1 of the air cylinder 15 connected to the lever 16 by the pin 21
The movable roll 13 is pulled down by 5A, and a gap is provided between the movable roll 13 and the fixed roll 12, so that the material W is not obstructed. When positioning in the width direction after passing the material, the air of the air cylinder 15 is discharged, and the material W is moved by the force of the clamp spring 17 provided on the pin 22 of the lever 16 to move the material W into the fixed roll 12 and the movable roll 13. Clamp between The clamped material W cannot move in the feed direction, but can move only in the width direction.

In this state, if the side guide roll 6 is moved from both sides in the width direction, the roll in the direction in which the material W is displaced hits the material W first, and while being pressed by the side guide roll 6, the material W When the position in the width direction is corrected, and finally the material W is sandwiched between the side guide rolls 6 on both sides, the positioning of the material W in the width direction is completed.

In this embodiment, clamping is performed by the clamp spring 17 and release is performed by the air cylinder 15, but it is also possible to perform clamping by an air cylinder and release by a spring.

[0015]

According to the present invention, since the backward movement preventing device does not change the position of the material in the width direction while positioning the material in the width direction, the backward movement preventing device uses a one-way clutch or the like. There is no need to manually center the material. In addition, there is no need for a device for returning to the center, such as a centering spring, and there is no limitation on the moving distance of the material, and the force required for the movement in the width direction is minimized. If the clamping force of the movable roll is changed by the clamping spring, it can be moved in the width direction without damaging even a thin plate, and if it is a thick plate, the clamping force is increased to prevent backward movement. The force to do it increases.

[Brief description of the drawings]

FIG. 1 is a side view of the present invention.

FIG. 2 is a front view of the present invention.

FIG. 3 is a side view of a conventional example.

FIG. 4 is a front view of a conventional example.

[Explanation of symbols]

6 is a side guide roll, 7 is an upper feed roll, 8 is a lower feed roll, 9 is an upper chute, 10 is a lower chute, 11 is a material feeder, 12 is a fixed roll, 13 is a movable roll, 14 is a pin, 15 is an air cylinder, 15A
Is a piston, 16 is a lever, 17 is a clamp spring, 1
8 is a fulcrum pin, 19 is a spacer, 20 is a rolling bearing, 2
Reference numerals 1 and 22 denote pins, and W denotes a material.

Claims (1)

(57) [Claims] 1. A material feeding apparatus for a press machine having at least a pair of feeding rolls for feeding a coiled material and a pair of rewinding preventing rolls for preventing the material from rewinding. The axial direction of the back-prevention roll, which can be freely adjusted, is disposed at right angles to the axial direction of the feed roll, and it is possible to perform positioning adjustment in the width direction of the material while clamping and preventing the material from returning. A material return prevention device for a material feeding device.