JPS6320426Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a feed length switching device for a roll feed used in a press.

Conventionally, in roll feeds used in presses, when switching the feed length, the reduction gear provided between the drive shaft and the feed roll shaft was replaced. However, replacing the reduction gear is troublesome and takes time, resulting in a reduction in the operating rate of the press.

The purpose of the present invention is to eliminate this drawback and to be able to alternately switch between two types of feed lengths in a short time by simply switching the hydraulic valve, thereby reducing the time the press is stopped to feed material. It is an object of the present invention to provide a feed length switching device for a roll feed that can improve the operation rate of a press because the play side can be prepared for the next operation in advance by using this. Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, a roll feed 7 mounted on a press 1 is shown. A timing pulley 2 is fixed to the rotating shaft of the press 1.

A timing pulley 4 is fixed to the input shaft of an index cam unit 3 mounted on the body of the press 1, and is connected to the timing pulley 2 by a timing belt 5 at a rotation ratio of 1:1. The index scum unit 3 is a conventional device that intermittently transmits power to the output shaft by half a rotation every half rotation during one rotation of the input shaft. A timing pulley 6 fixed to the output shaft of the index scum unit 3 and a timing pulley 11 of the drive shaft 8 of the roll feed 7 are connected by a timing belt 9.

In Figures 2 and 3, the roll feed 7
The details of the structure are shown.

A drive shaft 8 is rotatably supported on the body 10 of the roll feed 7, and a timing pulley 1 is provided in the center.
1 is fixed. Friction rolls 12 and 13 are detachably fixed to both ends of the drive shaft 8. Bearings 14, 1 that receive both shaft ends of the drive shaft 8
The part of the fuselage 10 that sandwiches 4a has one side 2 facing up and down.
A guide rod 15 is provided for each book. A bearing member 1 is attached to the guide rod 15 so as to be able to move up and down.
6 and 16a are provided to rotatably support both ends of the feed roll shaft 17. Friction rolls 12 are mounted on both ends of the feed roll shaft 17.
Friction rolls 18 and 19 corresponding to 13 are removably fixed. In the figure, the outer diameter of friction roll 12 is large, the outer diameter of 13 is small, the outer diameter of friction roll 18 is small, and the outer diameter of friction roll 19 is large. Cylinder members 20, 20a are provided at the lower end of the guide rod 15 so as to be movable up and down.

Bearing members 16, 16a and cylinder members 20, 2
A spring 21 is interposed between the bearing member 1 and the bearing member 1.
6 and 16a are strongly urged upward. This spring 21 allows power to be transmitted between the friction rolls 12 and 18 or between the friction rolls 13 and 19.
A piston 22 is adapted to each cylinder of the cylinder member 20, and the tip of the piston rod of the piston 22 is connected to the bearing member 16 or 16a, respectively. A port 23 for supplying and discharging pressure oil is provided in the cylinder chamber above the piston 22. A spring 24 is interposed between the bearing member 16 and the body 10. Pressure oil is supplied from port 23, and piston 2
When the spring 21 is compressed by a stroke length of 2, the spring 24 pushes down the bearing member 16 and the fuselage 10
Remove from friction roll 12, 18 or 1
It serves as a separation between 3 and 19. A feed roll 25 is fixed to the center of the feed roll shaft 17, and the machine body 10 is supported on both sides by ball bearings 26.
bearing. However, the feed roll shaft 17
When receiving the force of springs 24 at both ends, it is possible to tilt slightly due to the action of ball bearings 26. A roll 27 is provided facing the feed roll 25 and urged upward, and the plate can be fed by sandwiching the material between them.

Next, we will discuss the effect. In FIGS. 1 and 2, when the press 1 is operated, the index scam unit 3 moves while the slide of the press 1 is rising, that is, the crank angle changes from 270 degrees to 90 degrees after passing from top dead center 0 degrees. The timing pulley 6 of the output shaft is rotated approximately 180 degrees to drive the drive shaft 8 of the roll feed 7. Now, as shown in FIG. 2, when pressure oil is removed from the port 23 of the left cylinder member 20 and pressure oil is supplied to the port 23 of the right cylinder member 20a, the friction roll 1
Between the friction rolls 13 and 19, the force is transmitted by a spring 21, and between the friction rolls 13 and 19, a spring 24 is applied.
separated by. Therefore, feed roll axis 1
7 is given a large rotation angle, and the plate material sandwiched between the feed rolls 25 and 27 is given a large feed length. If the feed length is to be reduced, this can be done simply by switching the supply and discharge of pressure oil to and from the cylinder members 20 and 20a in the opposite direction, immediately bringing the friction rolls 13 and 19 into strong contact and separating them from each other. In addition, while the friction roll on one side is in use and the press is stopped at a cut in the feed material, replace the friction roll on the other side with one with a rotation ratio that has the feed length required for the next operation. Ba,
Saves man-hours when performing work such as mold replacement,
Press operation rate can be improved.

As is clear from the above explanation, according to the present invention, two sets of friction rolls are detachably provided,
By making it switchable, the feed length can be changed in an extremely short time with a simple operation, and the next preparation can be made in advance by using the stop period of the press while working at one feed length. The practical effects and advantages are extremely large, such as being able to improve the operating rate of the press.

[Brief explanation of drawings]

FIG. 1 is a front view of the press showing the arrangement of the embodiment;
2 is a sectional view taken along the line ``-'' in FIG. 1, and FIG. 3 is a partial sectional view taken along the line ``-'' in FIG. 1 is a press, 2 is a timing pulley, 3 is an index scum unit, 4 is a timing pulley,
5 is a timing belt, 6 is a timing pulley,
7 is a roll feed, 8 is a drive shaft, 9 is a timing belt, 10 is a fuselage, 11 is a timing pulley, 12 is a friction roll, 13 is a friction roll, 14 is a bearing, 15 is a guide rod,
16 is a bearing member, 17 is a feed roll shaft, 18
19 is a friction roll, 20 is a cylinder member, 21 is a spring, 22 is a piston, 23 is a port, 24 is a spring, 25 is a feed roll, 26 is a ball bearing, and 27 is a roll.

Claims (1)

[Scope of Claim for Utility Model Registration] In the roll feed of a press, a drive shaft 8 is rotatably provided on the upper part of the machine body and interlocks with the rotating shaft of the press, and bearing members 16 below both ends of the drive shaft 8 are movable up and down.
A feed roll shaft 17 is provided rotatably and substantially parallel to the drive shaft 8, and a feed roll shaft 17 is fixedly installed corresponding to both shaft ends of the drive shaft 8 and the feed roll shaft 17, and is in contact with each other to transmit power. Two sets of friction rolls 12, 18 and 13, 19 with different speed ratios, and respective bearing members 1 at both ends of the feed roll shaft 17.
6, one of the bearing members 16
a cylinder member 20 that selects and pushes up to bring either one set of friction rolls into contact;
A feed length switching device for a roll feed, comprising: 0a.