JP2652712B2 - Rotational load fluctuation detection device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotating body load fluctuation detecting device capable of detecting a fluctuation in load applied to a rotating body.

[Conventional technology]

Conventionally, when paper or cloth intermittently fed after printing is automatically wound, slippage by a friction material has been used. That is, on the side surface of the take-up roller that takes up paper or cloth, place a disk having the same rotation axis as the take-up roller,
A disc-shaped friction material is sandwiched between the disc and the take-up roller and pressed. Then, the disk is rotationally driven, and the winding roller is rotationally driven by the frictional force to wind up the paper (or cloth). During a period in which the paper is not transported and is stationary, the take-up roller slips with the friction material, so that only a small static friction force acts on the paper and the paper is not wound. When the paper starts to be fed again, the take-up roller stops slipping and starts taking up the paper again. The adjustment of the frictional force is performed by adjusting the strength of the force pressing the friction material.

[Problems to be solved by the invention]

In the above-mentioned prior art, since the frictional force is used for power transmission, it is easily affected by temperature and humidity and is unstable, and the paper breaks when winding up a paper having a small tensile strength. There was a defect that there was a possibility. Also,
Since the slip is used, there is a limit to the slip speed, and there is also a limit to the use for a long time. In addition, there was also a defect that the winding shaft was difficult to follow, and the wound paper was easy to sag.

An object of the present invention is to eliminate the above defects.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a drive shaft connected to a drive system and having a drive pulley fixed thereto, a swing shaft rotatably supported by the drive shaft, and an idler pulley rotatably mounted at both ends. Between the moving arm, one side of the rotating body and the other side of one idler pulley, between the other side of one idler pulley and one side of the driving pulley, one side of the driving pulley and the other idler. An endless winding intermediate node that is wound around the other side of the pulley and between the other side of the other idler pulley and one side of the rotating body,
The intermittently fed paper or cloth is taken up by using a load fluctuation detecting device for a rotating body having means for detecting a rotational displacement of the swing arm with respect to a drive shaft.

[Action]

The driving pulley is rotationally driven, and the rotating body is rotationally driven.
When the load of the rotating body increases during rotation of the rotating body, the tension of the winding intermediate node on one idler pulley increases, and at the same time, the tension of the winding intermediate node on the other idler pulley decreases. As a result, the swing arm rotates, and by detecting the rotational displacement of the swing arm,
A load fluctuation of the rotating body is detected.

〔Example〕

 Embodiments of the present invention will be described with reference to the drawings.

First Embodiment A first embodiment of the present invention will be described with reference to FIG. 1, FIG. 2 and FIG.

Reference numeral 2 denotes an integrated state of the printing paper and the backing sheet 4 in which a printing sheet with a cut in the form of a product (label) is attached to the backing sheet 4. Labels are printed on the printing paper in the one-piece unit 2 in a cut in the form of a product. Reference numerals 6 and 8 denote separation rollers which are rotatably supported by a machine body (not shown) of the printing press and which separate the unitary body 2. The unitary unit 2 is separated into a mount 4 and a scrap paper 10. . The product (label) is affixed to the backing paper that has come out of the separation roller, and the printing paper in the outer frame portion of the label becomes the scrap paper 10. Reference numeral 12 denotes a mount take-up roller for winding the mount 4, which is a body of a printing press (not shown).
And is configured to intermittently take up by an intermittent paper feed mechanism shown in the section of the related art (not shown). 14 is a scrap paper take-up roller,
The roller is rotatably supported by a body (not shown) of the printing press, and one end of the shaft of the roller is connected so that the wheel 16 rotates integrally with the roller. Reference numeral 17 denotes a drive shaft connected to the drive system of the continuously variable transmission 18. A drive pulley 19 is fitted and fixed to the drive shaft 17. Reference numeral 20 denotes a swing arm rotatably supported by the drive shaft 17, and idler pulleys 22 and 24 are supported at both ends of the arm 20. 26 is an endless timing belt. Where the wheel
16, idler pulleys 22, 24 and drive pulley 19,
The one side portion refers to a substantially right portion in FIG. 1, and the other side portion refers to a substantially left portion in FIG. The timing belt 26 is provided between one side of the wheel 16 and the other side of the idler pulley 22, between the other side of the idler pulley 22 and one side of the drive pulley 19, It is wound so as to connect between one side and the other side of the idler pulley 24 and between the other side of the idler pulley 24 and one side of the wheel 16, respectively.
Reference numeral 28 denotes a speed change lever that is supported by the body of the continuously variable transmission 18 on a shaft 29, and a spring 30 is connected to an end of the speed change lever. The spring 30 is connected to a mechanism (not shown) for adjusting the elastic force acting on the speed changer 28. The speed change hopper 28 is urged by the spring 30 to rotate counterclockwise in FIG. 1 with a force approximately twice the belt tension when the timing belt 26 is driven. A counterclockwise rotation is suppressed by a stopper 31 provided on the body of the machine 18. Also, the shift lever 28
Is connected to a drive system connected to the drive shaft 17 via a known transmission mechanism (not shown).
When the position 28 is in the position shown in FIG. 1, the drive pulley 19 rotates at a constant angular velocity, and when the position of the speed change lever 28 rotates clockwise from the position in FIG. 1, the rotation of the drive pulley 19 stops. It is configured as follows. Reference numeral 32 denotes an interlocking arm, one end of which is rotatably supported by the rotation shaft 23 of the idler pulley 22 and the other end of which is rotatably mounted on a part of the shift lever 28.
33 are supported.

In the above configuration, the interlocking arm 32 and the shift lever
The configuration using 28 is an example of a unit that detects the rotational displacement of the swing arm 20 with respect to the drive shaft 17, and is not limited to this configuration. The timing belt 26 is an example of a winding intermediate node, and may be configured to use a V-belt, a chain, or the like.

Instead of using a continuously variable transmission, a configuration may be used in which a variable speed motor that can be electrically controlled for shifting is used.

The operation performed by the configuration described above is as follows. The one-piece thing 2 is, after label printing is performed by the printing machine,
It is sent out intermittently in the direction of the arrow in the figure. The mount 4 is intermittently wound around the mount winding roller 12 as described above. The scrap paper 10 is intermittently wound around the scrap paper take-up roller 14 as follows.

In the moving period of the integrated body 2 (when the integrated body 2 is being fed), the winding speed of the scrap paper take-up roller 14 is usually equal to or higher than the feed speed of the integrated body 2. The rotation speed of the drive shaft 17 is set.

When the take-up speed of the scrap removal winding roller 14 is the same as the feed speed of the integrated object 2, the load on the scrap removal paper winding roller 14 is substantially zero, and the clockwise rotational force applied to the swing arm 20 is interlocked. The swing arm 20 does not rotate since it is held down by the spring 30 via the arm 32.

If the take-up speed of the waste paper take-up roller 14 is higher than the feed speed of the integrated object 2, the waste paper take-up roller 14
The load at the moment becomes extremely large. At this moment, the scrap paper take-up roller 14 does not wind up the scrap paper 10 and stops. At this time, the rotation of the driving pulley 19 generates a force between the timing belt 26 and the idler pulley 23 and between the timing belt 26 and the idler pulley 24 in a direction for driving the swing arm 20 clockwise in FIG. . This force overcomes the counterclockwise force of the spring 30 via the interlocking arm 32 to rotate the shift lever 28 clockwise. When the shift lever 28 rotates clockwise, the rotation of the drive shaft 17 stops, and the state is maintained. When the sheet is fed and the tension is reduced, the shift lever 28, the interlocking arm 32 and the swing arm 20 return to their original positions by the force of the spring 30. When the speed change lever 28 returns to the original position, the drive pulley 19 starts to rotate again, and the waste paper take-up roller
The roll 14 also starts rotating, but when the load on the scrap paper take-up roller increases again, the scrap paper take-up roller 14 stops rotating and the above-described operation is repeated.

In the one-piece 2 stop period (when the one-piece 2 is stopped without being sent), first, the load on the waste paper take-up roller 14 increases, and the rotation of the waste paper take-up roller 14 stops. As in the case where the winding speed during the moving period of the one-piece 2 is higher than the feed speed of the two-piece, the swing arm 20 rotates clockwise and the shift lever 28 rotates clockwise through the interlocking arm 32. Move. The rotation of the shift lever 28 stops the rotation of the driving pulley 19, and thereafter, until the sheet is fed and the tension is reduced (that is, until the stop period of the integrated object 2 ends).
Keep the state as it is.

By repeating the above-mentioned one-body 2 moving period and one-body 2 stop period, the waste paper 10 is intermittently wound around the waste paper take-up roller 14.

Note that the mount winding roller 12 may be driven intermittently by using the above-described device for driving the scrap paper winding roller 14 intermittently.

Second Embodiment A second embodiment of the present invention will be described with reference to FIG. The common parts to those of the first embodiment are given the same reference numerals, and the description thereof will be omitted. Reference numeral 60 denotes a fixed shaft fixed to the body of the continuously variable transmission 18 via a bracket (not shown). Reference numeral 62 denotes a swing arm rotatably supported by the fixed shaft 60, and an idler pulley 64 at both ends of the arm 62.
66 is supported. Reference numeral 68 denotes a connecting pulley, which is rotatably supported by the fixed shaft 60, and cooperates with the scraped paper take-up roller 14 (on the back side of the swing arm 62 in FIG. 4) with respect to the fixed shaft 60. It is linked to perform in unison. 70 is a link, one end of which is a shaft of an idler pulley 64
65 is configured to be rotatably supported, and the other end is rotatably supported to the shaft 25 of the idler pulley 24. 72 is an endless timing belt. Here, the idler pulleys 64 and 66, the connecting pulley 68, the idler pulley 2
2, 24, in the drive pulley 19, one side means a substantially right side portion in FIG. 4, and the other side portion means a substantially left side portion in FIG. The timing belt 72 is connected to the other side of the idler pulley 22 and the idler pulley 64.
Between one side of the idler pulley 64 and the other side of the connection pulley 68, between the other side of the connection pulley 68 and one side of the idler pulley 66, the idler pulley 66, between the other side of the idler pulley 24, between the other side of the idler pulley 24 and one side of the drive pulley 19, and between one side of the drive pulley 19 and the idler pulley 22. It is wound so as to connect between the other side parts.

In the above-described configuration, the timing belt 72 is an example of a winding intermediate node, and is not limited to the configuration using the continuously variable transmission, as in the previous embodiment.

The operation of the present embodiment is the same as that of the first embodiment, but since the two swing arms 20 and 62 are diagonally connected via the link 70, the force is reduced to approximately one half of the scrap paper tension. The difference is that the scraped paper take-up roller 14 can be operated and can be taken up with a weak tension.

〔effect〕

(1) Since the present invention is configured as described above, there is an effect that the paper or cloth that is intermittently fed can be stably wound. Further, there is an effect that the film can be stably wound even when used continuously for a long time, and can be stably wound even when the film is wound at a high speed.

(2) The present invention has an effect that the load fluctuation of the rotating body can be detected with a simple configuration without using a complicated mechanism.

[Brief description of the drawings]

1 is a front view, FIG. 2 is a plan view, FIG. 3 is a sectional view, and FIG. 4 is a front view. 17 ... Drive shaft, 19 ... Drive pulley, 22, 24 ... Idler pulley, 20 ... Swing arm, 26 ... Timing belt

Claims (1)

(57) [Claims] (A) a drive pulley (1) connected to a drive system;
A drive shaft (17) to which 9) is fixed; and (b) a swing arm (22) rotatably supported by the drive shaft (17) and having idler pulleys (22, 24) rotatably attached to both ends. (C) between one side of the rotating body (14, 16) and the other side of one idler pulley (22);
2) Between the other side and one side of the drive pulley (19), between one side of the drive pulley (19) and the other side of the other idler pulley (24) and the other idler pulley (24). An endless winding intermediate node (26) wound around the other side of the rotating body (14, 16) and one side of the rotating body (14, 16); and (d) the swing arm (20), Means for detecting rotational displacement with respect to the drive shaft (17).