JPS6143124B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a release device in a leveler feeder used for supplying plate materials to a press machine.

A leveler feeder is a so-called leveler and a roll feed integrated into the same frame, and includes a feed roll that feeds a fixed amount of plate material to a press, a row of work rolls that straightens the bending of the plate material, and a work roll that transports the plate material to the work roll. A pinch roll is used when feeding the plate into the column, a backstop roll is used to prevent the plate material sent out by the feed roll from retreating, and a work roll is used to correct the position of the plate within the press mold. and a release device for releasing from the row and feed rolls.

``Prior art'' Conventionally, in a leveler feeder, one of the upper and lower work rolls and feed rolls is rotatably mounted on a frame to serve as a fixed side, and the other is attached to the frame using a clamp cylinder using hydraulic pressure or the like. The movable side is used to correct bends and feed, and at the required time, release is performed by releasing hydraulic pressure or the like using a switching valve.

``Problems to be solved by the invention'' Conventional releases only release hydraulic pressure and remove biasing force, so the release is gradual, and as presses become faster, they are unable to keep up with the timing when release is required. There was a risk that the position correction of the plate material within the press mold would be inaccurate, or that the position correction pins would break and damage the mold.

"Means and operations for solving the problems" The present invention eliminates these drawbacks, and the movable work roll and feed roll are urged by a clamp cylinder, and when the hydraulic pressure of the clamp cylinder is released,
Alternatively, the timing of the release can be made to follow the press by forcibly releasing it at the required time using a drive system linked to the crankshaft of the press without releasing it, and the position of the plate material within the press mold can be corrected. Prevented damage to the mold.

Embodiment FIG. 1 shows the structure of a leveler feeder equipped with a release device according to the present invention. In this leveler feeder, the upper work roll 8
The column and the upper feed roll 9 provided on the exit side thereof are rotatably provided on the frame and serve as a fixed side. Conversely, the fixed side may be provided on the lower side.

Eight rows of lower work rolls, which correspond to the eight rows of upper work rolls in a staggered manner, are rotatably provided on a lever 6. The lower feed roll 9 facing the upper feed roll 9 is block 1.
A pin 17 is rotatably provided on the lever 6 and is provided on the block 16 concentrically with the feed roll 9. The pin 17 is fitted into an elongated hole in the vertical direction of the lever 6 with a gap C provided therebetween.

The lever 6 is swingably supported by a fulcrum shaft 10 provided on the exit side B of the feed roll 9. The fulcrum shaft 10 is provided concentrically with a lower roll of a backstop roll 13 that prevents the plate material provided on the exit side of the feed roll 9 from retreating.

A lever 5 is provided below the lever 6 and is swingably supported at its center by a fulcrum pin 3. A pin 7 provided at the other end of the link 4 connected to the tip of the inlet side A of the lever 6 fits into an elongated hole in the vertical direction provided at the end of the lever 5 with a gap e. The other end of the lever 5 and the eccentric part of the eccentric plate 1 are connected by a connecting rod 2. The eccentric plate 1 has a structure that rotates synchronously with the crankshaft of the press (not shown), and the direction of the eccentricity is about the same as the eccentricity of the crank of the press.
The phase is shifted by 180 degrees. A clamp cylinder 14 for urging the work roll 8 upward is provided between the tip of the lever 6 and the frame, and a feed roll 9 is provided between the block 16 and the frame.
A feed roll clamp cylinder 15 is provided to urge the feed roll upward.

Each of the upper work rolls 8 is provided with a work roll reduction adjustment screw 12, so that the amount of reduction of the plate material to the lower work roll 8 when straightening the bend of the plate material can be adjusted. A pinch roll 11 is provided on the inlet side A of the work roll 8 and is used only when introducing a plate material into the work roll 8.

Next, we will discuss the effect. A state in which the press stops at the top dead center, the eccentric part of the eccentric plate 1 is at the lower limit position, and the lower work roll 8 and feed roll 9 are at the upper limit via the connecting rod 2, lever 5, link 4, and lever 6. At this time, when the hydraulic pressure of the clamp cylinder 14 and feed roll clamp cylinder 15 is released by a switching valve (not shown), the work roll 8 and the feed roll are moved by the weight of the lower work roll 8 etc. due to the action of the gaps e and c. 9 portions of the roll are opened. In this state, the plate material is sent from the inlet side A to the outlet side B by the pinch rolls 11. When the plate material is held by the backstop rolls 13, the pinch rolls 11 release the plate material, and operation preparation is completed.

A switching valve (not shown) is switched to cylinder 1.
Pressure oil is supplied to the work rolls 4 and 15, and the work rolls 8 and feed rolls 9 are in a state where they clamp the plate material and give the required feed. Since gaps e and c are provided,
At the upper limits of the cylinders 14 and 15, the lever 5 can be slightly shaken while the eccentric portion of the eccentric plate 1 rotates around the upper limits.

When the feeding ends and the eccentric part of the eccentric plate 1 approaches the upper limit, the lever 5 swings in the direction of pulling the link 4 downward, but since there is a gap e, the work roll 8
The feed roll 9 is maintained upwardly biased by cylinders 14 and 15. The lever 5 that moves by the gap e at the required time is forcibly connected to the link 4,
The work roll 8 is released via the lever 6. Subsequently, when the lever 6 moves by the gap C, the feed roll 9 is released. Since the lever 6 is supported by the fulcrum shaft 10 on the exit side, it corresponds to the release movement of the work roll 8 on the entrance side and a large reduction amount, and is released from the entrance side, and then the feed roll 9 is released.

``Effects of the Invention'' According to the present invention, the pressure oil in the clamp cylinder can be released and forcibly released at the required time, and since the release is performed sequentially from the inlet side, the spring back of the material is Errors in feed length can be reduced without affecting the exit side, making it easy and accurate to correct the position of the plate within the press mold, and preventing damage to the mold. Therefore, it has great practical effects and advantages, such as being able to cope with higher press speeds.

[Brief explanation of the drawing]

FIG. 1 is a front view showing the main parts of a leveler feeder to which the present invention is applied. 1 is an eccentric plate, 2 is a connecting rod, 3 is a fulcrum pin,
4 is a link, 5 is a lever, 6 is a lever, 7 is a pin, 8 is a work roll, 9 is a feed roll, 10 is a fulcrum shaft, 11 is a pinch roll, 12 is a work roll reduction adjustment screw, 13 is a back stop roll,
14 is a clamp cylinder, 15 is a feed roll clamp cylinder, 16 is a block, 17 is a pin,
It is.

Claims (1)

[Claims] 1. In a release device for a leveler feeder that supplies plate material to a press machine, an upper work roll 8 and a feed roll 9 on the exit side of these are rotatably provided on a frame, and a lower work roll 8 is rotatably supported. and a lever 6 whose outlet side is pivotally connected to a fulcrum shaft 10 and urged upward by a cylinder,
The lower feed roll 9 is rotatably supported, and a block 16 that can be raised and lowered and is urged upward by a cylinder is provided on the frame, and a pin 17 of the block 16 is inserted into an elongated hole in the vertical direction of the lever 6 with a gap c. and engage
A lever 5 is provided below the lever 6 with its center portion pivotally connected to a fulcrum pin 3, and a pin 7 at the lower end of a link 4 pivotally connected to the inlet side end of the lever 6 is inserted into an elongated hole in the vertical direction of the lever 5 through a gap. Engage by leaning e, and then press lever 5.
A release device for a leveler feeder, characterized in that the outlet side end of the is connected to an eccentric portion of an eccentric plate 1 that interlocks with a crankshaft.