JPS6356142B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sheet winding shaft, and in particular includes a number of collars slidably and rotatably fitted around the outer periphery of the drive shaft, and a friction transmission mechanism that transmits the rotation of the shaft to each of the collars. This is an improved version of the previous model with a stronger and more accurate take-up shaft.

The above type of winding shaft has a number of relatively narrow collars arranged on the winding surface, each collar being frictionally driven by a drive shaft in the core. Therefore, when dividing a sheet into multiple rolls and winding them, for example, even if the growth conditions of the sheet roll wound in the center part and the sheet roll wound in other parts are different, and the diameters become different, the winding shaft The center collar simply has more slip than the other collars, and can be rolled up together.

This type of winding shaft can be roughly divided into two types. One of them is a long-standing one, in which the adjacent surfaces of the collars loosely engaged with the outer periphery of the drive shaft of the core are used as friction transmission surfaces. A drive collar pushed by, for example, a coil spring is attached to the end of the drive shaft, so that each collar is frictionally transmitted to the adjacent collar one after another.
This type of winding shaft has the disadvantage that the strength of the winding force varies depending on the location.

Second, in order to improve this, the rotary drive shaft is made hollow, a hose that expands with air pressure is inserted into it, and a piston-like member in the tube wall penetrating radial hole is pressed against the inner surface of each collar to drive friction. . In this type, the cross-sectional area of the member that is extruded by air pressure is relatively small, and the strength of the air pressure is limited, so the frictional force between the extruded member and the inner surface of each collar cannot be increased, which means that the frictional driving force that turns the collar is small. That's a thing.
When the sheet to be wound is a thick sheet, there is a drawback that sufficient winding force is not generated.

In the second type above, this invention departs from the conventional fixed concept of abutting the member protruding from inside the drive shaft against the inner circumferential surface of each collar, and instead protrudes to the side of each collar. Then, the force was greatly expanded by the wedge action at the tip, changing the direction in the axial direction, pressing each collar, and driving it by friction. This allows a large frictional driving force to be obtained even if the outward force within the drive shaft is relatively low. Furthermore,
The outward force from within the hollow shaft can be obtained not only by fluid pressure but also by pushing and pulling the conical body.

Next, the configuration and embodiments of the present invention will be described with reference to the drawings. First, to give an overview, it is equipped with a large number of collars 2 that are slidably and rotatably fitted around the outer circumference of a drive shaft 1, and a friction transmission mechanism that transmits the rotation of the shaft 1 to each of the collars 2. In the winding shaft for winding up the sheet S with or without the winding core C fitted on the outer periphery, the drive shaft 1 is made hollow so that an adjustable outward force can be applied to the inside thereof, and this Fitted in each of the numerous radial through holes 3 at the positions where the two groups of collars of the drive shaft 1 are fitted,
A radial drive body 5 has a pressure surface 4 in a direction perpendicular to the shaft 1 at its outer end, and has a radial drive body 5 at its inner end that receives the pushing force due to the outward force, and the push force applied to the inner end of the drive body 5 is applied to the outer end. This sheet winding shaft is characterized in that it is equipped with a pressure direction converter that converts the pressure force into a larger axial force by the wedge action of the pressure surface and presses each of the collars 2.

The pressing direction converting section of the embodiment shown in FIGS. 1 and 2 is the simplest example in which the side surfaces of each collar 2 are only sloped. When the pressure surface 4 at the tip of the radial driver 5 hits the slope 7, the collar 2 is strongly pushed in the axial direction due to a wedge effect.

The pressed collar 2 engages the drive shaft engaging member 6 interposed between the adjacent collar 2 that has also been pushed in the opposite direction.
Press down. In this case, the engaging member 6 is a ring-shaped plate having a shape as shown in FIG. The engagement relationship is circumferentially constrained. When the shaft 1 rotates, the two collars 2 pressed on both sides of the engaging member 6 are also dragged and rotated. It is desirable that the engaging member 6 has high surface friction on both sides.

The outward force of the hollow part of the drive shaft 1 is in this case such that the radial drive body 5 is pushed out via a hose (commercially available air tube) 9 which expands and contracts due to fluid pressure.

On the outer periphery of the collar 2, a well-known roller 10 is placed in the concave surface 11 to fix the core C when it is fitted, and when the roller 10 moves toward the shallow side of the concave surface 11, it applies strong pressure to the inner surface of the core C. to prevent it from slipping. The roller 10 is particularly made into a locking shape to prevent the roller 10 from falling off when the string-like coil spring 12 fitted in the outer circumferential groove of the collar 2 enters the locking recess and removes the winding core C. Preventing.

In the embodiments shown in FIGS. 4 and 5, only the differences from FIGS. 1 and 2 are shown. The radial driver 5 has a base part inside the through hole 3 and a tip member 5a having a pressurizing surface 4, which are connected by a shaft rod 5b. This tip member 5a has a fan shape and presses against the side surface (slanted surface) of the collar 2 with its wide pressurizing surface 4, so that it has high abrasion resistance. Further, on the other side of the collar 2, a friction wheel plate 13 that can be replaced when worn is attached to the drive shaft engaging member 6.
It is brought into contact with

The embodiment shown in Fig. 6 differs from those shown in Figs. 1 and 2 in that the air tube 9 is not inserted into the hollow drive shaft 1, and the fluid directly pushes the piston 14 in the through hole 3, causing the air to flow in the radial direction. The point of pushing out the driving body 5, the point that there is no drive shaft engaging member 6 and the radial direction driving body 5 also serves as this, and therefore the pair of collars that sandwich the engaging member 6 on both sides in FIG. 2 are integrated, and the shaft rods at both ends of the roller 10 are inserted into horizontal grooves on both side walls of the concave surface 11 as a means to prevent the roller 10 from falling off when it enters the concave surface 11 of the collar 2.

In the case of the embodiment shown in FIG. 7, the object to be pressurized by the tip of the radial driver 5 is not the side surface of the collar 2, but the slope 7 of the axially movable drive shaft engaging member 6';
The pressure surface of the tip of the driver 5 is in line contact with the slope 7 rather than in surface contact, and the engaging member 6a has a recessed portion for receiving the tip of the driver 5, as shown in FIGS. 8 and 9. This is the point where the slope is 7.

The embodiment shown in FIG. 10 is an example in which four collars 2, twice as many as in FIG. 1, are squeezed between two radial drive bodies 5 by a wedge action. As shown in Fig. 7, in this case, the core fixing means is not limited to the locking method using the roller 10, but may also be a conventional sawtooth steel plate with teeth facing the inner surface of the core, or a razor blade with a cutting edge slightly cut into the inner surface. An arbitrary winding core fixing material 15 is used.

The embodiment of FIG. 11 is similar to that of FIG. 7, but does not have an axial groove 8 on the outer circumference of the hollow drive shaft 1. For this purpose, the drive shaft engaging member 6'' has a set screw 16 passed through a threaded hole, and its tip is pressed against the outer periphery of the shaft 1.An anti-friction material ring 17 is also interposed between each collar 2 and the outer periphery of the shaft 1. ing.

In the embodiment shown in FIG. 12, the tip pressure surface 4 of the radial drive body 5 is only on one side and presses the slope 7 of the collar 2 on one side, and its back surface is vertical and has a drive shaft engaging member 6 fixed with screws. It is accepted by the aspect of ``.
The point that the collar 2 is pinched by the engaging member 6'' and the radial driver 5 and driven by friction remains unchanged.

The embodiment shown in FIG. 13 includes shaft engaging members 6, 6',
V-groove 1 on the inner circumference of each collar 2 without using 6" at all.
This is an example in which the pressure surface 4 at the tip of the radial driver 5 is pushed in to fit the collar 2, and the collar 2 also serves as a pressure direction conversion section.

The embodiment of FIG. 14 is similar to that of FIG. 13, but with a roller 19 at the inner end of its radial drive 5.
, and push the skewer-shaped conical cam drive rod 21 passed through the hollow part of the drive shaft 1 to
The circumferential surface of the roller 19 pushes the roller 19 outward. The outward force applied to the drive body 5 can be adjusted by adjusting the amount of pushing of the drive rod 21.

Although the present invention has been described above with reference to a small number of embodiments, it goes without saying that the present invention can be varied and applied in various ways without changing its gist. The outward force within the hollow shaft 1 may be due to either fluid pressure or a cam rod.

This invention sends fluid pressure inside the hollow drive shaft,
Breaking away from the conventional fixed concept that a type in which each collar is frictionally driven cannot produce a large winding force, we have made it possible to perform sufficiently strong winding, and even thick sheets can be easily wound. Even though the fluid pressure inside the drive shaft is the same as before, the wedge action of the drive body pushing out in the radial direction generates a large axial force, and this force presses the collar and the drive shaft engaging member together. , a strong frictional driving force, or winding force, was obtained. It also opened the door to using a skewer-shaped cam drive rod instead of fluid pressure. The winding force at each position of the winding shaft is generated equally by an outward force from within the shaft, and is adjustable, allowing precision winding to be performed.

[Brief explanation of drawings]

1 and 2 are front and side sectional views of one embodiment of this invention, and FIG. 3 is a plan view of the drive shaft engaging member.
FIG. 4 is a vertical cross-sectional view of a main part of another embodiment, FIG. 5 is a cross-sectional view of the same, FIGS. Planar and side sectional views of the drive shaft engaging member 6' of FIG. 7, Nos. 10, 11,
Figures 12 and 13 are longitudinal cross-sectional views of main parts of four other embodiments, and Figure 14 is an explanatory diagram of an embodiment in which the outward force from the hollow part of the drive shaft is not based on fluid pressure but on a skewer-shaped cam rod. . 1...Hollow drive shaft, 5...Radial direction driver, 6
. . . Drive shaft engaging member, 7 . . . Slope on the side surface of the collar that serves as a pressure direction conversion mechanism.

Claims (1)

[Scope of Claims] 1. A drive shaft includes a number of collars slidably and rotatably fitted around the outer periphery of the drive shaft, and a friction transmission mechanism that transmits the rotation of the shaft to each of the collars, and a winding core is fitted around the outer periphery of the collar group. In the winding shaft for winding the sheet, the drive shaft is made hollow so that an adjustable outward force can be applied to the interior thereof, and the position of the drive shaft where the collar group is fitted. a radial drive body that fits into each of the large number of radial through holes, has a pressure surface facing perpendicular to the axis at its outer end, and receives a push force from the outward force at its inner end; A sheet winding shaft, comprising: a pressure direction changing unit that changes the output in a larger axial direction by a wedge action of the outer end pressure surface and presses each of the collars.