JPH06115770A - Surface winding device - Google Patents

Abstract

PURPOSE:To prevent a sheet-shaped product from its deformation and elongation by controlling a contact pressure with a receiving roll in accordance with a winding amount of the sheet-shaped product. CONSTITUTION:Both end parts of a winding shaft 26 for winding a sheet-shaped product 13 are supported by liftable supporting rolls 27 through air cylinders 29, 30, so as to press this winding shaft 26 to a receiving roll 21 driven into contact with a conveyer belt 13. A load cell 23 for detecting a load of the sheet-shaped product 13, wound to the winding shaft 26, is provided in the receiving roll 21. By a signal of this load cell 23, a supply pressure to the air cylinder 29 is adjusted in a control means 24, and a position of the winding shaft 26 is changed so as to wind the sheet-shaped product 13 in a tapered tension condition of fixing its contact pressure changing it. In this way, the sheet-shaped product is prevented from its deformation and elongation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface winding device for winding a sheet-shaped product such as rubber or synthetic resin on a conveyor belt or with a touch roll. It should not be deformed or stretched.

[0002]

2. Description of the Related Art Up to now, two continuous winding devices have been used to wind a continuously fed sheet-shaped product alternately.

When winding a sheet-like product such as rubber or synthetic resin, especially when it is a soft and non-elastic rubber sheet, a surface winding device is often used. For example, as shown in FIG. Sheet product 1 to conveyor belt 2
On the conveyor belt 2, a receiving roll 3 is provided on the lower side of the conveyor belt 2 while being conveyed, and a winding shaft 6 attached to the tip of a swing arm 5 having a counterweight 4 at the base is mounted on the conveyor belt 2. The sheet-like product 1 is sandwiched and pressed against the receiving roll 3, and the liner sheet 7 for preventing the sheet-like product 1 from adhering together is wound around the winding shaft 6 by using the driving force of the conveyor belt 2. .

[0004]

In such a surface winding device, as the sheet-shaped product 1 is wound around the winding shaft 6, the winding shaft 6 at the tip of the swing arm 5 is raised. However, if the winding amount increases and the weight increases,
Although the counterweight 4 is attached to the base end portion of the swing arm 5, the contact pressure with the receiving roll 3 gradually increases, and the sheet-shaped product 1 is deformed or the sheet-shaped product 1 is pulled by a tensile force. There is a problem that will grow.

The present invention has been made in view of the problems of the prior art, and the deformation and elongation of the sheet-shaped product can be prevented by controlling the contact pressure with the receiving roll according to the winding amount of the sheet-shaped product. An object of the present invention is to provide a surface winding device which can be prevented.

[0006]

In order to solve the above problems, in the surface winding device of the present invention, a support roll supporting both ends of a winding shaft for winding a sheet-like product is lifted and lowered via a fluid pressure cylinder. It is possible to provide a receiving roll that presses the sheet-shaped product against the winding shaft by sandwiching the belt conveyor under the conveyor belt that conveys and drives the sheet-shaped product that is wound by this winding shaft. A load detector is provided, and control means for controlling the contact pressure between the sheet-shaped product and the receiving roll by adjusting the supply pressure to the fluid pressure cylinder of the support roll by the detection signal of the load detector is provided. It is what

Further, in the surface winding device of the present invention, instead of the load detector of the receiving roll of the first invention, the outer diameter of the sheet-shaped product wound around the winding shaft is changed, or the sheet-shaped product is wound. It is characterized in that a detector for detecting the rising position of the winding shaft which rises according to winding is provided and a detection signal of this detector is inputted to the control means.

Further, in addition to the structure of the first and second inventions, the surface winding device of the present invention is the weight of the sheet-shaped product wound on the winding shaft, the pressure being supplied to the fluid pressure cylinder of the support roll. The control means is configured so that the contact pressure between the sheet-shaped product and the receiving roll is increased as is increased.

[0009]

According to this surface winding device, both ends of the winding shaft for winding the sheet-like product are supported by the supporting rolls which can be moved up and down via the fluid pressure cylinder, and the winding shaft is provided below the conveyor belt. It is driven by pressing it against the receiving roll that is driven, and a load detector that detects the load of the sheet-shaped product wound around the winding shaft is provided on the receiving roll, and it is controlled by the detection signal of this load detector. By controlling the supply pressure to the fluid pressure cylinder by means, the position of the winding shaft is changed,
The contact pressure is made constant, or the contact pressure is changed so that the sheet can be wound in a so-called taper tension state to prevent the sheet-shaped product from being deformed or stretched.

Further, according to this surface winding device, a detector is provided to detect the position of the winding shaft that rises as the sheet-shaped product is wound and the change in the outer diameter of the sheet-shaped product. The control means controls the supply pressure to the fluid pressure cylinder by the detection signal of the detector to change the position of the winding shaft so that the contact pressure can be made constant or the taper tension state can be established.

Further, according to this surface winding device, when controlling the supply pressure to the fluid pressure cylinder of the support roll by the control means of the first and second inventions, the sheet-shaped winding device is wound around the winding shaft. In consideration of the inertial force that increases as the weight of the product increases, the contact pressure between the sheet-shaped product and the receiving roll is gradually increased to increase the driving force.

[0012]

Embodiments of the present invention will be described in detail below with reference to the drawings. 1 and 2 are a schematic configuration diagram and a partial side view according to an embodiment of a surface winding device of the present invention.

The surface winding device 20 is a device for winding a sheet-like product 13 conveyed by a conveyor belt 12 driven by a motor 11 by sandwiching a liner sheet 14 for preventing adhesion, and driving the conveyor belt 12. The force is used to drive the winding shaft in contact to wind it.

In this surface winding device 20, a receiving roll 21 is rotatably fixedly supported via a bearing 22 below the endless conveyor belt 12 in the conveying direction. Upon contact, the driving force is obtained from the conveyor belt 12 and externally driven.

The bearing 22 of the receiving roll 21 is provided with a differential transformer or load cell 23 as a load detector for detecting the load of the wound sheet-like product 13, and the load detection signal is the control means 24. Is input to the amplifier 25 constituting the.

The conveyor belt 12 of the receiving roll 21
A winding shaft 26 for winding up the sheet-like product 13 is disposed above the sheet, and both ends of the winding shaft 26 are placed between two support rolls 27 and are rotatably supported. Two support rolls 27 are attached to the lifting table 28,
As a fluid pressure cylinder, it is connected to two stages of air cylinders 29, 30 and is driven up and down.

Of the two-stage air cylinders 29, 30, the lower one, which has a short stroke, extends the rod before the start of winding or after the winding is completed, thereby slightly raising the winding shaft 26. An air cylinder 29 having a long stroke in the upper stage is provided to make a gap between the conveyor belt 12 and the conveyor belt 12. The air cylinder 29 raises the winding shaft 26 in accordance with the winding amount of the sheet-like product 13 wound on the winding shaft 26. Used to go.

The upper air cylinder 29 is directly connected to the rod tip of the lower air cylinder 30.
By expanding and contracting the rod of the lower air cylinder 30, the entire upper air cylinder 29 is moved up and down.

In these two-stage air cylinders 29 and 30, pressure adjusting valves 32 and 33 are respectively provided from an air pressure source 31.
Compressed air is supplied via the.

Then, these two pressure adjusting valves 32, 3
3 is adjusted by the pressure control signal from the electric-air converter 34 connected to the amplifier 25 constituting the control means 24, whereby the contact pressure between the sheet-shaped product 13 wound around the winding shaft 26 and the receiving roll 21 ( Contact pressure) can be controlled.

The winding of the sheet-like product 13 by the surface winding device 20 thus constructed will be described.

In winding the sheet-shaped product 13 in this case, there are several methods of controlling the contact pressure (contact pressure) between the sheet-shaped product 13 wound around the winding shaft 26 and the receiving roll 21.
It is roughly classified into a case where the contact pressure is kept constant and a case where so-called taper tension is used in which the contact pressure is increased according to the winding amount.

(1) Winding with a constant contact pressure First, in order to prepare the winding shaft 26 so that the winding shaft 26 is retracted above the conveyor belt 12, compressed air is supplied to the lower air cylinder 30 having a small stroke. The feeding and raising / lowering table 28 is raised, and the winding shaft 26 supported by the support roll 27 is raised (at this time, the upper air cylinder 29 is located slightly above the lower limit position).

After that, in order to start winding, the liner sheet 14 is fed onto the conveyor belt 12, and the sheet-like product 13 conveyed through the conveyor belt 12 is conveyed to just below the winding shaft 26. By the way, the lower air cylinder 30 lowers the lifting table 28 so as to sandwich the conveyor belt 12, the sheet product 13, and the liner sheet 14 between the receiving roll 21 and the winding shaft 26, and the driving force of the conveyor belt 12 is increased. Then, the winding shaft 26 is contact-rotated to wind the sheet-shaped product 13 up to a predetermined winding length while extending the rod of the upper air cylinder 29 according to the winding amount.

After the winding is completed, the lower air cylinder 3
0 is stretched once again to raise the entire winding shaft 26, separate from the conveyor belt 12, and move in the raised state. Then, the winding shaft 14a on which the liner sheet 14 is wound is rolled on the moving table 35 to support the roll. Move between 27 and reel 2
Use as 6.

When the winding of the sheet-shaped product 13 is started in this way, the weight of the sheet-shaped product 13 increases in accordance with the winding amount, so that the inside of the upper air cylinder 29 slightly elevated from the lower limit position. The air is compressed, the winding shaft 26 descends, and the weight of the sheet-shaped product 13 is added to the receiving roll 21.

Then, the load change is detected by the load cell 23 provided in the bearing 22 of the receiving roll 21,
The supply pressure of the compressed air to the upper air cylinder 29, which is input to the amplifier 25 of the control means 24 and cancels the load change, is calculated, and the pressure adjusting valve 32 is adjusted via the electric-air converter 34. To do.

As a result, the lift table 28 is raised by the upper air cylinder 29, the position of the winding shaft 26 is raised, and the contact pressure between the sheet-shaped product 13 wound around the winding shaft 26 and the receiving roll 21 is increased. It is controlled to be constant.

If the contact pressure between the sheet-shaped product 13 wound around the winding shaft 26 and the receiving roll 21 is controlled to be constant, the sheet-shaped product 13 may be crushed and deformed by its own weight. In addition to being prevented, the sheet-like product 13 is prevented from being stretched due to an increase in tensile force.

(2) Winding of taper tension (changing contact pressure) In this taper tension winding, when the winding amount of the sheet-like product 13 on the winding shaft 26 increases, the inertial force of the winding shaft 26 increases. As a result, the rotational driving force required for winding is increased, but if the contact pressure with the receiving roll 21 is kept constant, the actual winding force is reduced and the sheet-shaped product 13 is wound around the winding shaft 26 loosely. It is to prevent that.

In this taper tension winding,
In the case (1) where the contact pressure is constant, the steps up to are wound up in exactly the same procedure, and the description thereof will be omitted.

The load change is detected by the load cell 23 provided in the bearing 22 of the receiving roll 21, and the control means 24
Of the compressed air supplied to the upper air cylinder 29, which is required to be adjusted with respect to the load input in advance to the amplifier 25 and is adjusted in advance. Pressure adjusting valve 3 via air converter 34
Adjust 2.

As a result, the lift table 28 is raised by the upper air cylinder 29, the position of the winding shaft 26 is raised, and the contact pressure between the sheet-like product 13 wound around the winding shaft 26 and the receiving roll 21 is increased. The height of the sheet-shaped product 13 is controlled to be increased according to the winding amount of the sheet-shaped product 13 on the winding shaft 26.

If the contact pressure between the sheet-shaped product 13 wound around the winding shaft 26 and the receiving roll 21 is controlled so as to increase little by little, the sheet-shaped product 13 is always pulled with a constant pulling force. The sheet-shaped product 13 can be wound up and more reliably prevented from being stretched or deformed.

In the surface winding device 20, the load detector 23 is used to detect the contact pressure between the sheet-shaped product 13 wound around the winding shaft 26 and the receiving roll 21, but this load detector is used. 23, the outer diameter position of the sheet-shaped product 13 wound on the winding shaft 26 may be detected by a potentiometer or an ultrasonic sensor as a detector, or the winding shaft 26
The amount of rise of itself is detected by a potentiometer or an ultrasonic sensor as a detector, and this detection signal is input to an amplifier 25 that constitutes the control means 24, and based on this, the support roll 27 that is preset It is also possible to control the constant contact pressure and control the taper tension in the same manner as in the above-mentioned invention, by increasing the amount of increase. Thereby, the same effect as that of the above-described invention surface winding device 20 can be obtained.

Further, in the above embodiment, the winding shaft is raised and lowered by 2
Although the operation is performed by using a single-stage air cylinder, as shown in FIG. 3, the single-stage air cylinder 51 and the control valves 52, 53 are combined to utilize the fully closed state of the control valve 52 to move the air cylinder to an intermediate position. Alternatively, the contact pressure may be held constant, and the contact pressure may be kept constant or the taper tension may be controlled as described above.

In the above embodiment, the case where one surface winding device is installed on the conveyor belt has been described. However, when performing continuous winding, two devices are installed and alternately wound. Just do it.

Further, the sheet-like product is not limited to being conveyed by using a conveyor belt, but may be wound with a surface-wound touch roll.

Further, it goes without saying that each component may be modified within the scope of the present invention.

[0040]

As described above in detail with reference to the embodiment, according to the surface winding device of the present invention, both ends of the winding shaft for winding the sheet-like product can be moved up and down via the fluid pressure cylinder. Support with a support roll, press this winding shaft against a receiving roll that is driven by contact with a conveyor belt, and install a load detector on the receiving roll that detects the load of the sheet-shaped product wound on the winding shaft. Therefore, the control signal controls the supply pressure to the fluid pressure cylinder by the detection signal of this load detector to change the position of the winding shaft to keep the contact pressure constant or change the contact pressure. It can be wound up, and it is possible to prevent deformation and elongation of the sheet-shaped product.

According to the surface winding device of the present invention,
Both ends of the winding shaft that winds the sheet-shaped product are supported by supporting rolls that can be moved up and down via fluid pressure cylinders, and this winding shaft is pressed against a receiving roll that is externally driven by a conveyor belt and the like. Since a detector is provided to detect the outer diameter position of the sheet-shaped product wound around and the lift amount of the winding shaft, the control signal controls the supply pressure to the fluid pressure cylinder by the detection signal of this detector. By changing the position of the winding shaft, the contact pressure can be made constant, or the taper tension state can be achieved, so that the deformation and elongation of the sheet-shaped product can be prevented.

Further, according to the surface winding device of the present invention, when the supply pressure to the fluid pressure cylinder of the support roll is controlled by the control means of the first and second inventions, the surface winding device is wound around the winding shaft. In consideration of the inertial force that increases as the weight of the sheet-shaped product increases, the contact pressure between the sheet-shaped product and the receiving roll is gradually increased, so the driving force should be increased according to the increase in weight. It is possible to wind with a constant winding force.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram according to an embodiment of a surface winding device of the present invention.

FIG. 2 is a side view according to an embodiment of the surface winding device of the present invention.

FIG. 3 is a schematic configuration diagram according to another embodiment of the surface winding device of the present invention.

FIG. 4 is a schematic configuration diagram of a conventional surface winding device.

[Explanation of symbols]

 Reference Signs List 11 motor 12 conveyor belt 13 sheet product 14 liner sheet 20 surface winding device 21 receiving roll 23 load cell (load detector) 24 control means 25 amplifier 26 winding shaft 27 support roll 28 lift 29, 30 air cylinder 31 air pressure source 32 , 33 Pressure regulating valve 34 Electric-air converter 51 Air cylinder 52, 53 Control valve

Claims (3)

[Claims] 1. A conveyor belt for supporting both ends of a winding shaft for winding a sheet-shaped product so as to be able to move up and down via a fluid pressure cylinder, and a conveyor belt for conveying and driving the sheet-shaped product wound by this winding shaft. A receiving roll that presses the sheet-shaped product against the winding shaft by sandwiching the belt conveyor is provided on the lower side, and a load detector is provided on the support shaft of this receiving roll.
A surface winding device provided with a control means for controlling the contact pressure between the sheet-shaped product and the receiving roll by adjusting the supply pressure to the fluid pressure cylinder of the supporting roll by the detection signal of the load detector. . 2. The load detector of the receiving roll is replaced with a change in the outer diameter of the sheet-shaped product wound around the winding shaft, or a rising position of the winding shaft that rises in response to the winding of the sheet-shaped product is detected. 2. The surface winding device according to claim 1, further comprising a detector for inputting the detection signal of the detector to the control means. 3. The supply pressure to the fluid pressure cylinder of the support roll is increased so that the contact pressure between the sheet-shaped product and the receiving roll is increased as the weight of the sheet-shaped product wound around the winding shaft increases. The surface winding device according to claim 1 or 2, wherein the control means is configured.