JPH0143434Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of application of the invention] The invention is based on the transfer tension (tension) that acts on the fabric in the process of continuously transferring the fabric.
This invention relates to an air dancer used in an automatic tension control device for automatically adjusting tension to a desired value.

[Background of the idea]

For example, pre-treatment of industrially produced long fabrics,
When dyeing, washing, etc. are performed continuously, the fabric is passed through a predetermined processing reaction chamber, such as a steamer can, and subjected to moist heat treatment in the processing reaction chamber to continuously carry out the desired processing. Generally speaking, during the reaction treatment using the above-mentioned treatment reaction chamber, a large amount of fabric is placed inside the treatment reaction chamber in order to ensure a long reaction time in the treatment reaction chamber. A large number of guide rolls are arranged to guide the fabric, and the fabric is configured to be transported in a meandering manner within the processing reaction chamber by these guide rolls. Therefore, unstable tension acts on the fabric as it snakes through the processing reaction chamber, guided by a large number of guide rolls, due to shrinkage force due to moist heat in the processing reaction chamber, or tension caused by the guide rolls. A problem arises in that the texture, bulkiness, etc. of the fabric are impaired, making it difficult to obtain a high-quality treated fabric.

Therefore, in the past, as a structure for adjusting the tension of the fabric that is continuously transported, a dancer roll that can perform width adjustment is used to mechanically adjust the tension of the fabric guided by this dancer roll. However, this tension adjustment mechanism artificially adjusts the weight of the dancer roll by assuming the tension that acts on the fabric to be transferred. There was a problem in that the weight of the dancer roll had to be adjusted each time depending on the quality or degree of finish. In addition, as a device for solving this problem, for example, as shown in FIG. By moving the dancer roll 1 in the vertical direction by the introduction pressure of the supplied pressure medium, the tension in the transport direction (longitudinal tension) of the fabric guided by the dancer roll 1 can be adjusted, Furthermore, a tension control device has previously been proposed in which the dancer roll position, that is, the tension value at that time, can be detected by the synchro angle sensor 4.

However, the diaphragm 3 used in such a tension control device moves the dancer roll 1 around the support shaft 5 by linear movement of the diaphragm.
Since the arm 2 is rotated using the diaphragm as a fulcrum, the length of the arm 2 becomes large in order to adjust the movement of the dancer roll 1 over a wide range by the movement of the diaphragm, which can only obtain a relatively small amount of movement. As a result, a large installation space is required for the device, and the stress on the diaphragm 3 becomes large, so that the diaphragm 3 inevitably becomes larger. In addition, a device equipped with an air cylinder that utilizes linear motion in place of the diaphragm 3 has been proposed, but this also has the same drawbacks as described above.

[Purpose of invention]

The present invention was made to eliminate such conventional drawbacks, and by using a rotor that can directly rotate the spindle of the arm that supports the dancer roll, it is possible to downsize the entire air dancer device. It is an object of the present invention to provide an air dancer that achieves this goal and further reduces the size of the automatic tension control device as a whole by reducing the installation space.

[Example of idea]

The present invention will be explained in detail below based on the embodiment shown in FIGS. 1 and 2.

11 is a dancer roll that should guide the fabric 12, and both ends of this dancer roll 11 are
It is rotatably supported by one end of each arm 14 via a bearing 13. Furthermore, these arms 1
A support shaft 15 is fixed to the other end of 4. 16
is a rotary actuator, and a rotating shaft 18 is supported through a cylinder 17 of the rotary actuator 16. Furthermore, a piston 19 is installed inside the cylinder 17.
A rack 20 is attached to this piston 19. Pinion 21 meshed with this rack 20
is attached to the rotating shaft 18, and the rotating shaft 18 is coaxially connected to the supporting shaft 15 via a coupling 22. 23 is a pressure receiving chamber formed by the piston 19 and the cylinder 17, and this pressure receiving chamber 23 is communicated with the header tank 24.
25 is a pressure reducing valve for supplying pressurized air to the header tank 24, and 26 is a pressure gauge.

The above is the configuration of this embodiment. Next, the operation will be described.
1 and further drives a feed roll (not shown) to transport the fabric 12. At this time, the dancer roll 11 is controlled by the air pressure inside the header tank 24 so that it is at position A in FIG. 1, for example. is adjusted by operating the pressure reducing valve 25. Therefore, if the fabric 12 is run in this state, it will be run with the standard fabric tension, but if the fabric tension is weakened, the dancer roll 11 will be at a position where the internal pressure is balanced with the pressure receiving chamber 23, that is, the dancer roll 11 will be moved to B. located at a point. On the contrary, if the fabric tension is strengthened, the dancer roll 11 will be located at point C by the same operation, and the position of this dancer roll 11 will be detected by the angle sensor 4 shown in FIG. The fabric drive motor is controlled by a control circuit (not shown) so that the tension is at a normal value.

In this way, the air dancer according to this embodiment is
The damper that regulates the variable force of the dancer roll 11 that operates as the tension changes has a rotary structure consisting of a pinion 21, a rack 20 that meshes with the pinion, and a piston that is attached to the rack 20. Compared to an air cylinder or diaphragm type damper that operates in a straight line, it can be made smaller, and this has the effect of reducing the installation space and, ultimately, reducing the size of the fabric processing reaction chamber.

[Summary of the idea]

As described above, the present invention has a dancer roll 1 at one end.
A support shaft 18 is fixed to the other end of the arm 14 supporting the cylinder 1, and a pinion 21 is provided on the support shaft 18. The rack 20 is integrated with the piston 19 constituting a pressure receiving chamber 23 within the cylinder 17, and further
This is an air dancer characterized by having a header tank 24 connected thereto.

[Effect of the invention] Therefore, according to the air dancer of this invention, the damper that regulates the variable force of the dancer roll 11 that operates in accordance with the fluctuation of the tension is the pinion 21.
Since it has a rotary structure consisting of a rack 20 that meshes with this pinion and a piston that is attached to this rack 20, it can be made smaller compared to conventional linearly operated air cylinders or diaphragm type dampers. This has the effect of reducing the installation space and further downsizing the fabric processing reaction chamber.

[Brief explanation of the drawing]

FIG. 1 is an explanatory side view showing an embodiment of the air dancer according to the present invention, FIG. 2 is an explanatory front view of the air dancer, and FIG. 3 is an explanatory view of a prior example. 11...Dancer roll, 12...Fabric, 13
... Bearing, 14 ... Arm, 15 ... Support shaft, 16
... Rotary actuator, 17 ... Cylinder, 18 ... Rotating shaft, 19 ... Piston, 20
... Rack, 21 ... Pinion, 22 ... Coupling, 23 ... Pressure receiving chamber, 24 ... Header tank, 25 ... Pressure reducing valve, 26 ... Pressure gauge.

Claims (1)

[Scope of utility model registration request] A support shaft 18 is fixed to the other end of the arm 14, which supports the dancer roll 11 at one end.
8 is provided with a pinion 21, and the pinion 21 is
A rack 20 located within the cylinder 17 is engaged with the rack 20, and the rack 20 is integrated with a piston 19 constituting a pressure receiving chamber 23 within the cylinder 17, and a header tank 24 is connected to the pressure receiving chamber 23. An air dancer characterized by