JPS5823448Y2 - material tensioning device - Google Patents

Description

[Detailed description of the invention] This invention aims to prevent damage to the material due to pressurization of the sandwiched parts and to adjust the pressurizing force when performing drawing or other processing of elongated materials by applying tensile force in the axial direction. This invention relates to a material tensioning device that is simplified.

The applicant had previously proposed (Utility Application No. 54-183450) a device in which a pair of elastic rings is supported by a pair of driving rollers and one floating roller. Due to the gear movement, there were restrictions on the movement of the drive roller (to change the pressing force of the elastic ring).

However, in this invention, a common chain was attached to the sprocket wheels fixed to the shafts of each pair of drive rollers (four drive rollers), and each shaft was mounted eccentrically to the bearing, so that the pressing force on the elastic ring was reduced. In addition to eliminating conduction constraints on adjustment, fine adjustment of pressurizing force is made simple and easy.
This solves the conventional problems mentioned above.

That is, to explain this invention with reference to an embodiment, elastic rings 1 and 2 (for example, made of mild steel, Young's modulus of 21,000 and 9/mj, outer diameter of 321 mm, inner diameter of 300 mm, width of 10.5
m) facing each other in the same plane, each of the elastic rings 1 and 2
A pair of drive rollers 3.3a, 4.4a and idler rollers 5, 6 are inscribed inward, respectively, and the pair of drive rollers 3.
3at4t4a support the elastic rings in a bridging manner on one side of the elastic rings 1, 2, that is, on the opposite clamping sides, and the floating rollers 5.sub.6 support the elastic rings on the other side to determine the position of the elastic rings.

Shafts 9, 9a, 1 of the drive rollers 3, 3a, 4° 4a
0 and 10a are installed eccentrically to bearings 1°7a, 8, and 8a, respectively, and a common chain 13 is attached to sprocket wheels 11, 11a, 12, and 12a fixed to each shaft 9°9a, 10, and 10a. , each of the bearings 7, 7a, 8, 8
Worm wheels 14, 14a, 15°1 are installed on the outer wall of a.
A common worm 16 is engaged with each worm wheel, and one end of the shaft of the worm 16 is connected to the fuselage 11.
It protrudes outward to form an input end, and the other end is rotatably supported by a bearing 18 within the body 1γ.

In the figure, reference numerals 19 and 20 are elastically deformable support rods that support the floating roller 5.6 @2L22.

In the above embodiment, when the workpiece material 23 is clamped as shown in FIG. 4 and the elastic rings 1 and 2 are rotated, for example, in the direction of arrows 24 and 25, the workpiece material 23 is moved in the direction of arrow 26. Moving.

In order to rotate the elastic ring 1°2 in the direction of arrows 24.25, the drive rollers 3, 3a, 4, 4a must be rotated in the directions of arrows 27°, 28.29.30, respectively. , the sprocket wheel 32 of the drive shaft 31 must be rotated in the direction of the arrow 33.

In this case, the chain 13 will move in the direction of the arrow 34, and each sprocket wheel will be mounted on the tension side of the chain, so that the driving force can be transmitted without the risk of loosening the chain during operation. is done accurately.

Next, if each bearing is rotated in order to bring the elastic rings closer together, for example, the center position of each drive roller 3, 3a, 4, 4a will move from 0 to the OI position, but the drive shaft 31
Since the sprocket wheels 32 are in the old position, the relative position of the chain 13 changes as shown in 13a, but the installed length hardly changes, and each sprocket wheel is installed on the tension side of the chain. For this reason, there is no risk of any hindrance to the transmission of driving force.

Since the idle roller moves in position due to the elastic deformation of the support rod, it can be moved following the movement of the drive roller without any problem.

However, depending on the direction of rotation of the worm, the elastic rings will move closer or farther apart by the amount of eccentricity of the drive roller shaft.

In the figure, 35 is an input sprocket wheel, and 36 is a tension adjustment sprocket wheel.

That is, according to this invention, since the shaft of the drive roller is mounted eccentrically on the bearing, the clamping pressure of the elastic ring can be freely and easily adjusted by rotating the bearing.

Furthermore, since a common chain is attached to the sprocket wheel fixed to the shaft of each drive roller, there is no risk of interlocking structure of the drive system being disturbed even if the drive roller is moved.

In addition, since the floating roller is supported to the fuselage by an elastic support rod, even if the elastic ring is moved for adjustment, the floating roller will follow the movement due to the elastic deformation of the support rod, which will not interfere with its stable support. There is no risk of this happening.

[Brief explanation of the drawing]

Figure 1 is a front view of an embodiment of this invention, Figure 2 is a sectional view, and Figure 3 is an explanatory diagram showing the movement of the elastic ring.
The figure is an explanatory view of the device in use, FIG. 5 is a front view of an embodiment of the device in which grooves are added to the elastic ring, and FIG. 6 is a sectional view of the device. 1.2... Elastic ring, 3, 3a, 4, 4a... Drive roller, 5, 6... Idle roller, 7, 7a
. 8.8a... Bearing, 9,9a, 10, 10a... Shaft, 11.11a, 12, 12a... Sprocket wheel, 13... Chain, 14, 14a, 15° 15
a... Worm wheel, 16... Worm, 17
...Airframe.

Claims (1)

[Scope of utility model registration request] A pair of driving rollers and one floating roller are respectively inscribed in a pair of elastic rings for material clamping, and supported at three points.
Each of the drive roller shafts is eccentrically supported by a respective bearing, and each of the bearings is rotatably installed on the fuselage, a sprocket wheel of the same diameter is fixed to each of the drive roller shafts, and a common sprocket wheel is attached to all the sprocket wheels. A chain is attached, and the chain is also attached to the sprocket wheel of the drive shaft, and is engaged with a gear provided on the outer wall of each bearing and a hugger for rotating the bearing. Material tensioning device supported by support rods.