JPS5833430B2 - Ittsuteiriyouokurisouchi - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fixed amount feeding device for rotating an object by a fixed angle.

A device that performs rotational feeding at a fixed angle has, for example, a water wheel and a pile rod rotatably supported around a fulcrum, and the pile rod has two
Various proposals have been made, such as a device that attaches two feed claws and performs rotational feed at a fixed angle every time the stack swings, that is, both forward and backward movements, but the feed claws and reversal prevention claws of water turbines have been considered. No consideration is given to means for stopping the water turbine at a predetermined position.

Therefore, since the object has mass and inertia, it is difficult for objects with relatively large mass to stop correctly at a certain feed position.

Even if the amount of movement due to inertia is predicted in advance and the amount of feed is set, subtle changes occur every time the feed is made due to changes in friction, etc., and it is not always possible to stop at the desired position accurately.

SUMMARY OF THE INVENTION An object of the present invention is to provide a feeding device that can accurately stop even an object having a large mass and inertia at a predetermined movement position.

The object of the present invention has been achieved by providing a feed device using a ratchet wheel and pawl with a reversal prevention device for the ratchet wheel and a quantitative feed device for the feed pawl.

The details of the present invention will be explained with reference to the drawings with reference to embodiments.

In FIG. 1, a ratchet wheel 1 connected to an object having a large inertia that is rotated by a fixed amount is fixed to a rotatable shaft 2, and a feed lever 3 is rotatably supported on the shaft 2.

A feed claw 4 is rotatably supported on the feed lever 3 by a pin 5.

The feed lever 3 receives tension from a spring 6 and is held at a standby position where it abuts against a stopper 7 during standby.

A feed stopping pawl 9 for quantitative feeding, which is mutually subjected to tension by the feeding pawl 4 and a spring 8, is rotatably supported on a shaft 10.

An operating pin 11 for controlling the operation of the feed stop claw 9 is attached to the feed lever 3.

When the feed lever 3 is pulled against the force of the spring 6, the feed pawl 4 pressed against and engaged with the teeth of the ratchet wheel 1 by the action of the spring 8 feeds the ratchet wheel 1 in the direction of the arrow.

Since the actuation pin 11 moves as the feed lever 3 moves, the actuation pin 11 moves the ratchet wheel 1 in the standby state.
The feed stop pawl 9, which had been separated from the teeth of , receives the tension of the spring 8 and rotates around the shaft 10 following the movement of the actuating pin 11.

When the feed lever 3 reaches the position where the ratchet wheel 1 is rotated by the desired angle, the feed stop pawl 9 is positioned so that the feed stop pawl 9 engages the teeth of the ratchet wheel 1 and stops the ratchet wheel 10 from rotating. is set.

When the ratchet wheel 1 stops receiving the restraining action of the feed stop pawl 9, the feed lever 3 cannot be moved quickly.

Even if large inertia is acting on the ratchet wheel 1, the feed is stopped, so the stopping position is accurately determined, and feed by a constant amount, for example, one pitch, can always be accurately obtained.

When the feed force acting on the feed lever 3 is removed, the feed lever 3 is returned to the stop position where it comes into contact with the stopper 7 by the action of the spring 60.

At this time, the feed pawl 4 is given a force to rotate in the disengagement direction around the pin 5 by the teeth of the ratchet 1, and the feed stop pawl 9 is applied in the disengagement direction by the operating pin 11 provided on the feed lever 3. Since the feed lever 3 is rotated around the shaft 10, the return movement of the feed lever 3 is not prevented.

When the feed lever 3 returns, if the inertia of the object is very small, the ratchet wheel 1 will move due to the frictional force of the feed pawl 4.
may be reversed.

In order to prevent this, a check pawl 12 is provided which engages with the teeth of the ratchet wheel 1 and prevents the ratchet wheel 1 from being reversed.

This non-return pawl 12 is rotatably supported by a pin 13 and the spring 1
4 is pressed into engagement with the teeth of the ratchet wheel 1.

With such a device, an object can always be fed by a predetermined constant amount regardless of the magnitude of inertia, and it is also possible to avoid irregularities in the stopping position of the fixed amount feed due to inertia.

Although rotational feed has been described, it is obvious that the present invention can also be applied to linear motion if the radius of the ratchet wheel 10 becomes infinite.

Note that the shape of the teeth of the ratchet can be arbitrarily selected.

[Brief explanation of drawings]

The figure is an explanatory diagram of the principle of a fixed amount feeding device according to the present invention. 1... Ratchet wheel, 3... Feed lever, 4... Feed pawl, 9... Feed stop pawl, 11... Actuation pin .

Claims (1)

[Claims] 1. A ratchet wheel connected to an object to be fed by a certain amount, a feed lever supported so as to be able to reciprocate relative to the ratchet wheel in the rotational direction, and a feed lever rotatably supported by the feed lever and connected to the ratchet wheel. A feed pawl that engages only in the feed direction of the ratchet wheel, and a feed pawl that is rotatably supported at a predetermined position on the opposite side of the feed lever to the feed direction of the ratchet wheel, and the teeth of the ratchet wheel are always held at a predetermined position. a feed stop pawl formed to engage with and prevent rotation of the ratchet wheel in the feed direction; means for applying a force to the feed pawl in a direction to engage the teeth of the ratchet wheel; and a feed stop pawl means for applying a force in a direction to engage the teeth of the ratchet wheel; and means for engaging the feed stop pawl and engaging the teeth of the ratchet wheel when the feed lever moves in a direction opposite to the feed direction. A feed stop claw release actuation pin connected to the feed lever is provided so that the feed lever can be moved in a direction to disengage from the feed stop claw when the feed lever is disengaged and moved in the feed direction. Fixed amount feeding device.