JPS6327092B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tensioning device for a strip used when continuously heat treating or straightening the strip.
Note that the band plate referred to in the present invention includes not only a so-called band plate but also a wire rod and a strip material.

Tensioning devices are conventionally used when continuously heat treating or straightening the strip, and examples of conventional devices include pinch roll, bridle, or capstan devices.

The pinch roll type has first and second pinch rolls 3 connected to a variable speed motor between an uncoiler 1 and a winder 2, as shown in FIG.
a, 3b and 4a, 4b are provided, and the motor is electrically controlled to connect the first and second pinch rolls 3a, 3.
A predetermined tension is applied to the strip plate 5 between 4a and 4b. However, this method has the drawback of high costs for mechanical and electrical equipment required for control. In addition, the bridle system uses first and second bridles 6a and 6 instead of pinch rolls, as shown in FIG.
b, 7a, 7b are provided, and these bridles 6
A, 7a are driven by a motor to apply tension to the strip 5, but this method also has the drawback of high equipment costs, similar to the pinch roll method.

Furthermore, in the capstan method, as shown in FIG. 3, first and second capstans 8 and 9 are provided instead of the pinch rolls, and these capstans 8 and 9 are driven by a motor to apply tension to the strip plate 5. However, it still has the drawback of high equipment costs.

The present invention was made in view of the above circumstances, and
The purpose of this is to make it possible to control the tension applied to the strip mechanically instead of electrically, thereby simplifying the structure of the device, reducing equipment costs, and reducing power consumption. The present invention provides a tensioning device for a strip that is inexpensive, does not cause malfunctions, and is extremely easy to operate.

The present invention will be explained below with reference to the drawings.

FIG. 4 shows the case of the pinch roll system, in which first pinch rolls 13a, 13b, which are the first strip guide members, and a second tension applying roll 14 are arranged between the uncoiler 11 and the winder 12. Second pinch roll 15 which is a strip guide member
a and 15b are arranged between which the strip plate 16 is moved under tension. The first pinch roll 13a and the second pinch roll 15a are provided close to each other, and coaxially provided gears 17 and 18 are mechanically coupled via a coupling gear 19. In this case these first and second
pinch rolls 13a, 13b, 15a, 15b
is non-driven. Also, the tension adding roll 14
It is also non-driven and can move in the direction of arrow A.

In this tensioning device, the uncoiler 11
When the strip plate 16 is unwound from the beginning and the winder 12 is rotated to pull the strip plate 16, the strip plate 16 passes through the first pinch rolls 13a, 13b and the tension applying roll 14.
And the winder 12 is wound up through the second pinch rolls 15a and 15b.

To apply tension to the steel strip 16 between the first pinch roll and the second pinch roll, the tension applying roll 14 is pressed in the direction of arrow A with a constant pressure. This constant pressure is achieved by attaching an air cylinder or a hydraulic cylinder (not shown) to the tension applying roll 14 and applying a predetermined air pressure or hydraulic pressure thereto.
By pressing the tension applying roll 14,
Apply tension to the strip 16. In this case, regarding the strip plate 16 between the pinch rolls 13a, 13b and the tension adding roll 14, the pinch roll 15 is moved in the direction of arrow
Band plate 1 between a, 15b and tension applying roll 14
6, tension is applied in the direction of arrow X'. At this time, the first and second pinch rolls 13a, 13b,
15a and 15b each try to rotate,
These pinch rolls 13a and 15a are connected by a connecting gear 19, so the pinch roll 1
The rotations of 3a and 15a are mutually restricted and the torques cancel each other out. For this reason, these pinch rolls 13
A, 15a do not require a drive motor to apply tension.

According to this device, the pinch rolls 13a, 13
b, 15a, 15b and the tension applying roll 14 are not driven, and the tension application is not electrically controlled, so the structure is extremely simple.

Furthermore, FIG. 5 shows a structure in which the device shown in FIG. 4 is further simplified, in which the pinch roll 20 serves not only as the first and second pinch rolls but also as a mechanical connection means for these pinch rolls. be.

FIG. 6 shows a bridle-type tensioning device, in which first bridles 21a and 21b, which are first strip guide members, a tensioning roll 22, and a second
The second bridle 23 is a band guide member of
a, 23b, and is provided coaxially with the first and second bridles 21a, 23a.
4 and 25 are connected via a connecting gear 26. Further, the tension applying roll 22 is movably attached and is pressed with a constant pressure by a hydraulic cylinder or the like.

In this device as well, the bridles 21a, 21b, 23a, 23b and the tension applying roll 22 can be made non-driven as in FIG. 4, so the structure is extremely simple.

7 and 8 show a capstan-type tensioning device, and this device has a capstan 30 and a first
A tensioning roll 31 which also serves as a second strip guide member is provided so that the strip 16 moves from the capstan 30 to the tensioning roll 31 to the capstan 30, and the tensioning roll 31 is movably mounted. It is pressed at a constant pressure by a hydraulic cylinder or the like.

In addition, this device includes a heating device 32 at the route of the strip 16 from the capstan 30 to the tensioning roll 31.
and a cooling device 33, and a drying device 33 is provided on the return path of the strip 16 from the tensioning roll 31 to the capstan 30, so that the strip can be heated, cooled, and dried.

Also in this device, the structure can be simplified by making the capstan 30 and the tension applying roll 31 non-driven. Furthermore, this device is particularly suitable for straightening the shape of narrow steel strips and wire rods.

In the above embodiments, a straightening device that simply applies only a tensile force or a straightening device that simultaneously performs tension and heating (FIG. 8) is shown, but the present invention can also be applied to a straightening device that simultaneously performs tension and bending.

Furthermore, this device can be applied not only to straightening but also to other devices (for example, heat treatment devices) as long as it is necessary to apply tension to the strip.

As described above, according to the present invention, both the strip guide member and the tensioning roll are non-driven, and the power is required from an air source or hydraulic power source for pulling the tensioning roll at a constant tension, and for moving the material. Because it uses only motor power, it has a simple structure, low equipment costs, and has remarkable effects such as low power consumption.

[Brief explanation of the drawing]

1 to 3 are explanatory diagrams of different conventional tension applying devices, and FIGS. 4 to 8 show embodiments of the present invention. FIG. 4 is an explanatory diagram of a pinch roller type tension applying device. Fig. 5 is an explanatory diagram of a pinch roller type tension applying device different from Fig. 4, Fig. 6 is an explanatory diagram of a bridle type tension applying device, and Fig. 7 is an explanatory diagram of a tension applying device of a bridle type.
The figure is an explanatory diagram of a capstan type tensioning device.
FIG. 8 is a front view of the device. 11... Uncoiler, 12... Winder, 13
a, 13b...first pinch roll, 14, 22,
31... Tension adding roll, 15... Second pinch roll, 16... Band plate, 19, 26... Connecting gear, 21
a, 21b...first bridle, 23a, 23b
...Second bridle.

Claims (1)

[Claims] 1. Between the uncoiler and the winder of the strip,
A roll-shaped or drum-shaped first strip guide member, a movable tension-applying roll, and a roll-shaped or drum-shaped second strip guide member are arranged in this order, and the first strip guide member is arranged in this order. The guide member and the second strip guide member are mechanically connected, and the first and second strip guide members are interlocked, and the first and second strip guide members and the tension applying roll are connected together. A strip tensioning device that applies tension to the strip between the strips. 2. The strip tensioning device according to claim 1, wherein the first strip guide member is a pinch roll, a bridle, or a capstan. 3. The strip tensioning device according to claim 1, wherein the second strip guide member is a pinch roll, a bridle, or a capstan.