JPH0350128Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention is suitable for transporting sheet-like objects such as cloth, paper, synthetic resin sheets, thin steel plates, etc., and string-like objects such as ropes (hereinafter referred to as "moving (referred to as the body) tension adjustment;
This invention relates to a dancer roller device used for storage, etc.

(Prior art and its problems) When transporting a traveling body over a long distance, it is necessary to adjust the tension of the traveling body to an appropriate level depending on the type of traveling body, traveling conditions, etc. In order to adjust the tension of the traveling body, a dancer roller device has been conventionally provided in the middle of the conveyance system. Following such an example, the applicant of the present application also carries out degreasing, resist film coating, baking, development, etching, resist film peeling, etc. on the steel strip while transporting it, which is the raw material for the shadow mask of color television picture tubes. In the production line for shadow masks, in which shadow masks are manufactured through the following processes, a dancer roller device is placed in the middle of the conveyance path to adjust the tension acting on the steel strips, and to perform the work of adding steel strips using the dancer roller device. This can be done without stopping the conveyance system by utilizing the accumulation effect of .

FIG. 3 schematically shows a conveyance system used in such a production line for shadow masks, and a dancer roller device A is provided in the middle of the conveyance system. In the dancer roller device A, a plurality of fixed rollers 1 are rotatably installed in parallel at a predetermined height position on a main body frame (not shown), and a support frame 3 provided with a weight placement part 2 is movable up and down on the main body frame. A plurality of dancer rollers 4 are installed in parallel on this support frame 3. Then, a workpiece 5 wrapped with a steel band plate, which is a raw material for the shadow mask, is mounted on a feed-out shaft 6, and the steel band plate 7 pulled out from the workpiece 5 is passed through a guide roller 8 and a nip roller 9 to a fixed roller 1 of a dancer roller device A.
and dancer rollers 4 alternately, and further winds up onto a winding shaft 12 via drive nip rollers 10 and 11. In this case, each process necessary for manufacturing the shadow mask performed on the steel strip 7 is performed between the drive nipper rollers 10 and 11.

The conveyance of the strip steel plate 7 by this device is carried out by releasing the nip by the nip roller 9 as shown in FIG.
This is carried out by putting the driving nip rollers 10, 11 in the nipping state and rotating each roller 10, 11 and the winding shaft 12 in the direction of the arrow in the figure.
At this time, the tension acting on the steel strip 7 is caused by the weight 13 placed on the weight mounting portion 2 of the dancer roller device A.
Adjusted by weight. Further, in this device, when the workpiece 5 attached to the feeding shaft 6 has been completely fed out, the work of adding the steel strip 7 is carried out as follows. That is, at the time when the final end of the steel strip 7 is fed out from the feeding shaft 6, the nip roller 9
The strip steel plate 7 is nipped by the nip roller 9, and the subsequent conveyance of the nip roller 9 is stopped. At this time, the rollers 10 and 11 and the winding shaft 12 continue to convey the steel strip 7 on the front side of the nip roller 9, and as a result, the dancer roller device A is able to wind the steel strip 7 onto the winding shaft 12. The dancer roller 4 is moved at a speed related to the picking speed (in other words, the conveying speed).
begins to rise together with the support frame 3. Therefore, before the dancer roller 4 reaches the height of the fixed roller 1, the next workpiece 5 is mounted on the payout shaft 6, and its starting end is connected to the final end of the previous workpiece, the steel strip 7. After the connection is completed, the nip of the nip roller 9 is released and the conveyance of the latter side of the nip roller 9 is restarted, and the dancer roller 4 is lowered to the original position again and the normal conveyance is resumed. . In this way, the work of adding steel strips 7 can be carried out without stopping the conveyance system by utilizing the accumulating action of the dancer roller device A.

However, in the above dancer roller device A,
Since the tension is adjusted based on the weight of the weight 13 placed on the weight placement portion 2, various problems have arisen as follows.

Generally, during steady conveyance, it is necessary to adjust the tension acting on the steel strip 7 to an appropriate level. That is, if the tension is too weak, the steel strip 7 will bend between the rollers (for example, between the rollers 8 and 9),
The bent portion comes into contact with an obstacle (not shown) placed below the bent portion, and the steel strip plate 7 is damaged. On the other hand, if the tension is too strong, slips will occur between the steel strip 7 and the driving nip rollers 10, 11, causing scratches on the steel strip 7 and making it impossible to control the speed. For this reason, fine adjustment of the tension is required, but this fine adjustment is not easy when loading and unloading the weight 13, so we prepared many types of weights 13 with different weights and various combinations to obtain the required tension. The problem arises of having to make a choice.

When adding different types of steel strips 7, it is necessary to change the tension accordingly.
For example, following the steel strip plate 7 with a plate thickness of 0.10 mm,
When connecting 0.30mm steel strip plate 7, the tension is 5.
It is necessary to change from Kg to 15Kg, and if the number of dancer rollers 4 is 2, for example, the weight 1
It is necessary to increase 3 by 40kg. At this time, in order to prevent sudden stress changes from occurring inside the steel strip 7, the tension must be gradually increased.
Therefore, a problem arises in that a complicated operation is required to sequentially place a total of eight weights 13, each weighing 5 kg, on the weight placement section 2.

Even when adding steel strips 7 of the same type,
Since there are some variations in material, width, thickness, etc. for each product, it is necessary to finely adjust the tension accordingly, and in this case, the same drawbacks as above occur.

When the steel strip 7 is conveyed in a meandering manner by the drive nip rollers 10 and 11, it is necessary to correct the meandering by releasing the nip between the drive rollers 10 and 11. In order to deal with this, it is necessary to adjust the weight of the weight 13 placed on the weight placement section 2 in advance. This adjustment work must also be performed by loading and unloading the weight 13, which makes the work complicated as in the above case.

(Purpose of the invention) This invention was made in order to solve the above-mentioned problem, and the object is to provide a dancer roller device that can accurately adjust the tension acting on a running body such as a steel band plate with simple operation. With the goal.

(Means for achieving the object) This invention includes a fixed roller and a dancer roller installed on a support frame that is movable relative to the fixed roller, and a long traveling body is engaged with a group of these rollers. This is a dancer roller device that controls the tension of the running body by adjusting the tension of the running body. A drive source is connected to the input shaft of the stepless clutch, and means for transmitting the torque appearing on the output shaft as a load to the support frame of the dancer roller is connected to the output shaft of the stepless clutch.

(Function) According to the dancer roller device of this invention, since the torque appearing on the output shaft side can be adjusted steplessly by the stepless clutch, this torque is transmitted as a load to the dancer roller support frame. , the tension acting on the running body can be adjusted steplessly.

(Embodiment) FIG. 1 is a schematic configuration diagram showing a dancer roller device B which is an embodiment of this invention, and FIG. 2 is a perspective view of the main parts thereof. In this embodiment, a dancer roller device B is provided in the middle of a conveyance path in a production line for shadow masks.

As shown in both figures, in this dancer roller device B, a plurality of fixed rollers 14 are rotatably installed in parallel at predetermined height positions on a main body frame (not shown), and a support frame 15 is mounted on the main body frame so that it can be raised and lowered. A plurality of dancer rollers 16 are attached to this support frame 15.
are installed in parallel while being rotatably supported by bearings 17. The fixed rollers 14 and the dancer rollers 16 are alternately engaged with steel strips 7, which are the raw materials for the shadow mask.

A continuous clutch, such as a powder clutch 18, is provided at a lateral position of the support frame 15. The powder clutch 18 includes an input shaft 19 and an output shaft 20, and is provided with a volume 21 and an amplifier 22 for steplessly adjusting the electromagnetic coupling force between the input shaft 19 and the output shaft 20. An input shaft 19 of the powder clutch 18 is connected to a drive unit such as a motor 23, and a first sprocket 24 is fixed to the output shaft 20. A second sprocket 25 is arranged above the first sprocket 24, an endless chain 26 is stretched between these sprockets 24 and 25, and a part of the endless chain 26 is connected to the joint 27.
A balance weight 28 is attached to the other part of the endless chain 26 to balance the weight of the support frame 15, the dancer roller 16, etc. In this case, the sprockets 24, 25, the endless chain 26, the joint 27, and the balance weight 28 constitute a torque transmission means 29. Further, a dancer roller 1 is attached to the rotating shaft 30 of the second sprocket 25.
A rotary encoder 31 is provided for detecting the vertical position of 6, and the detection signal is input to a control section (not shown). The conveyance system of the shadow mask production line in which this dancer roller device B is incorporated has the same configuration as the conveyance system of the proposed example explained using FIG. 3, so the explanation thereof will be omitted.

The tension adjustment by this dancer roller device B is as follows:
While the motor 23 is constantly rotating, the volume 21
This is done by adjusting the By adjusting the volume, the input shaft 19 of the powder clutch 20
Since the electromagnetic coupling force between the output shaft 20 and the output shaft 20, in other words, the torque transmission force from the input shaft 19 of the powder clutch 20 to the output shaft 20, is adjusted steplessly, the torque appearing on the output shaft 20 side can be adjusted to the minimum value "0". ” to a maximum value that is the same as the powder clutch's maximum transmission torque. In this way, the required torque transmitted to the output shaft 20 side by adjusting the volume 21 is transmitted to the sprocket 24 and the chain 2.
6, the torque is transmitted to the dancer roller 16 via the joint 27 and the support frame 15, and the dancer roller 16 is pushed down by this torque, thereby applying the required tension to the steel strip plate 7.

Note that during steady conveyance, it is desirable to hold the dancer roller 16 at a predetermined lowered position. Therefore, in this embodiment, the dancer roller 1
6 is constantly detected by the rotary encoder 31, and the detection signal is sent to a control unit (not shown). Based on this detection signal, the control unit operates the feed-out shaft (corresponding to the feed-out shaft 6 in FIG. 3). Band steel plate 7
The amount of feed of the dancer roller 16 is adjusted so that the vertical position of the dancer roller 16 is kept constant.
Of course, when adding the strip steel plate 7,
Since it is necessary to raise the dancer roller 16, the above-described control for holding the dancer roller 16 at a predetermined height is canceled at this time.

In this way, according to this dancer roller device B, the tension acting on the steel strip 7 can be adjusted by controlling the volume 2.
This can be done with an extremely simple operation of just 1. Moreover, since the tension can be adjusted steplessly, fine adjustments can be made in a short time and with high precision.

In the above embodiment, the powder clutch 18 is used as the stepless clutch, but any stepless clutch that can steplessly adjust the coupling force between the input shaft and the output shaft may be used. You can.

Furthermore, the torque transmission means 29 may be provided not only at one end of the support frame 15 but also at the other end. In this case, it is desirable that the torque output from the single powder clutch 18 be distributed and transmitted to the respective torque transmission means 29 using a gear mechanism or the like. As a result, tension can be applied more stably to the steel strip 7.

The dancer roller device of this invention is not limited to adjusting the tension of the steel band plate 7, which is the raw material for shadow masks, but can also be used to adjust the tension of the steel strip 7, which is the raw material for shadow masks. Needless to say, it can be applied to tension adjustment.

(Effects of the invention) As described above, according to the dancer roller device of this invention, since the load acting on the dancer roller support frame is adjusted by the stepless clutch, the tension acting on the traveling body is reduced. The effect is that the adjustment work can be performed with high precision through simple operations.

[Brief explanation of the drawing]

Fig. 1 is a schematic configuration diagram of a dancer roller device that is an embodiment of this invention, Fig. 2 is a perspective view of its main parts, and Fig. 3 is a conveyance system of a shadow mask manufacturing line incorporating a conventional dancer roller device. It is a schematic block diagram. B...Dancer roller device, 7...Strip steel plate, 1
4... Fixed roller, 15... Support frame, 16... Dancer roller, 18... Powder clutch, 19
... Input shaft, 20 ... Output shaft, 21 ... Volume, 23 ... Motor, 24, 25 ... Sprocket, 26 ... Endless chain, 29 ... Torque transmission means.

Claims (1)

[Claims for Utility Model Registration] (1) A fixed roller and a dancer roller installed on a support frame that is movable relative to the fixed roller, and a long running body is engaged with a group of these rollers. A dancer roller device configured to control the tension of traveling 1 includes a stepless clutch that can steplessly adjust the coupling force between the input shaft and the output shaft, and a drive that applies driving force to the input shaft of the stepless clutch. and means for transmitting the torque appearing on the output shaft of the stepless clutch as a load to the support frame of the dancer roller. (2) The stepless clutch is composed of a powder clutch and has a volume for adjusting the electromagnetic coupling force between the input shaft and the output shaft, the drive source is composed of a motor, and the torque transmission means is the powder clutch. A first sprocket fixed to the output shaft of the clutch, and a second sprocket arranged above the first sprocket.
The dancer roller according to claim 1, which is a registered utility model and includes a sprocket and an endless chain stretched between the two sprockets, and a support frame of the dancer roller is connected to a part of the endless chain. Device.