JPS60204552A - Sheet winding shaft - Google Patents

Abstract

PURPOSE:To obtain strong winding force in a sheet winding shaft by producing large axial force by the wedge action of a driver for pushing out radially by fluid pressure in the interior of a driving shaft, thereby to push a collar and a driving shaft engaging member each other. CONSTITUTION:A sheet winding shaft includes a hollow driving shaft 1, where adjustable outgoing force can be applied to the interior thereof, radial drivers 5 respectively accomodated in a lot of radial through holes 3 at positions where a group of collars 2 are fitte, which have pressurizing surfaces 4 intersecting the shaft 1 at the outer ends thereof and receive the push-out force by outgoing force at the inner ends thereof, and a pressurizing direction changing portion adapted to change the push-out force applied to the inner ends of the drivers 5 into large axial force by wedge action of the pressurizing surfaces at the outer ends, thereby to press the respective collars 2. The pressurizing force change portion is constructed, for example, simply so that the side of each collar 2 itself is an inclined surface. When the pressurizing surfaces 4 at the forward end of the radial drivers 5 contact the inclined surfaces 7, the collars 2 are axially pushed strongly by wedge action, so that the collars 2 clamps a driving shaft engaging member 6.

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 winding a sheath by dividing it into multiple pieces, for example, even if the growth rate of the sheet roll wound in the center and the sheet roll wound in other parts are different, and the diameters are different, the winding axis 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.

This method has been around for a long time, and the adjacent surface of each collar loosely fitted around the outer periphery of the drive shaft of the core is used as a friction transmission surface. For example, attach a drive collar pressed by a coil spring to the end of the drive shaft.
As a result, 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, that is, the frictional driving force that turns the collar is It's a small 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. Zaranimata,
The outward force from within the hollow shaft is not limited to fluid pressure, but can also be obtained by pushing and pulling a 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 periphery of a drive shaft l, and a friction transmission mechanism that transmits the rotation of the shaft l to each of the collars. In the winding shaft for winding the sheet S with or without the winding core 0 fitted around the group outer periphery, the drive shaft l is made hollow so that an adjustable outward force can be applied to the inside thereof, and This drive shaft is fitted into each of the multiple radial transparent rods 3 at the positions where the color rods are fitted, and has a pressurizing surface in the direction that intersects the axis L at the outer end, and has an extrusion force due to the outward force at the inner end. Radial driver to receive! and a pressurizing direction converter that converts the pushing force applied to the inner end of the driver j into a larger axial force by the wedge action of the outer end pressurizing surface and presses each of the collars. This is a distinctive sheet winding shaft.

The pressing direction converting section of the embodiment shown in FIGS. 1 and 2 is the simplest example in which the side surface of each collar λ itself is sloped. A radial driver on the slope 7! When the pressurizing surface at the tip hits, the collar 2 is strongly pushed in the axial direction due to the wedge action.

The pushed collar pinches the drive shaft engaging member 6 interposed between it and the collar λ, which is also pushed in the opposite direction. In this case, the engagement member plate is a ring-shaped plate shaped as shown in Fig. 3, and its three inward projections α fit into the axial grooves t at three locations on the outer periphery of the drive shaft l, allowing axial movement. , an engagement relationship of circumferential restraint is established. When the shaft I rotates, the two collars 2 pressed on both sides of the engaging member B are also dragged and rotated. It is desirable that the retaining member t has high surface friction on both sides.

In this case, the outward force in the hollow part of the drive shaft l is due to the fluid pressure,
Hose that expands and contracts (commercially available air/cow hose) 9 or spring 1. I'm trying to bury the automatic fire control system.

On the outer periphery of the collar, a well-known roller 10 is placed in the concave surface // to fix the winding core 0 when it is fitted, and the roller 10 is placed in the concave surface //.
When the p-ra 10 moves to the shallow side, the inner surface of the winding core 0 is strongly pressed to prevent it from slipping. Especially that roller 10! A string-like coil spring /J, which is formed into a circular shape and fitted into a groove on the outer periphery of the collar, enters the four circular parts and prevents the fourth roller 10 from falling off when the winding core 0 is removed.

In the embodiments shown in FIGS. 4 and 5, only the differences from FIGS. 1 and 2 are shown. Radial driver! divides the base inside the through hole 3 and the tip member jα having the pressurizing surface l, and connects both with a shaft rod sb. This tip member jα has a fan shape and has a wide pressurizing surface that presses against the side surface (slanted surface) of the collar and is highly abrasion resistant.

Furthermore, a friction wheel plate 13 that can be replaced when worn is attached to the other side of the collar and brought into contact with the drive shaft engaging member 6.

The example in Figure 6 is similar to the one in Figures 1 and 2, and the hollow drive shaft! The point where the fluid directly pushes the piston/4 (in the through hole 3 and pushes out the radial driver j) without putting the air tube 9 inside, there is no drive shaft engaging member 6, and the radial driver j serves as this function, and therefore, the pair of collars that sandwiched both sides of the engaging member B in the first @ are now integrated.
As a means to prevent lO from falling into the concave surface of the colorco, the shaft rods at both ends of the p-210 were placed in horizontal grooves on both side walls of the concave surface ii.

In the case of the embodiment shown in FIG. 7, the target to be pressurized with the tip of the radial driver j is not the collar side surface but the slope 7 of the axially movable drive shaft engaging member t', and the slope 7 and A driving body that makes line contact instead of surface contact! The retaining member 6α is a tip pressurizing surface, and the portion of the retaining member 6α that receives the tip of the driver j is recessed to form a slope 7, as shown in FIGS.

The embodiment shown in Figure 10 is a radial driver! Between the two, the first
This is an example in which four colors λ, which are twice as many as shown in the figure, are squeezed by a wedge action. As shown in Fig. 7, in this case, the core fixing means is not limited to the rotary type using the p-ra 10, but may also be a conventional sawtooth steel plate with teeth facing the inner surface of the core, or a cutting edge slightly cut on the inner surface. An arbitrary core fixing material such as a razor blade is used.

The embodiment of FIG. 11 is similar to that of FIG. 7, but does not have an axial groove t on the outer periphery of its hollow drive shaft l.

For this purpose, the drive shaft engaging member 6'' has a set screw/≦ passed through the screw hole, and its tip is pressed against the shaft/outer circumference.

Further, an anti-friction material ring 17 is interposed between each collar and the outer periphery of the shaft l.

In the embodiment shown in FIG. 12, the tip pressurizing surface of the radial driver S is only on one side, and pressurizes the slope 7 of the collar on one side.
Its back surface is vertical and is received by the side surface of the screwed drive shaft engaging member 6N. The point that the collar 2 is pressed between the engaging member t'' and the radial driver j and is frictionally driven remains unchanged.

In the embodiment shown in FIG. 13, the shaft engaging members 4, j', j
Radial drive body in the V-groove/l on the inner circumference of each collar without using ' at all! Push the pressure side of the tip to fit,
This is an example in which a collar also serves as a pressure direction conversion section.

The embodiment of FIG. 14 is similar to that of FIG. 13, but with the radial driver! By attaching a roller 19 to the inner end of the drive shaft l and pushing in a skewer-shaped conical cam drive rod passed through the hollow part of the drive shaft l, the circumferential surface of each conical cam λO pushes the p-ra outward. That's what I do. The outward force applied to the drive body S 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 l may be caused by either fluid pressure or a cam rod.

This invention breaks the conventional fixed concept that a type that frictionally drives each collar by sending fluid pressure inside a hollow drive shaft cannot generate a large winding force, and enables sufficiently strong winding. , even thick sheets can be easily rolled up. Even though the fluid pressure inside the drive shaft is the same as before, a large axial force is generated due to the wedge action of the drive body pushing out in the radial direction, 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 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]

Figures 1 and 2 are front and side sectional views of an embodiment of this invention;
FIG. 3 is a plan view of the drive shaft engaging member, FIG. 4 is a vertical cross-sectional view of main parts of another embodiment, FIG. 5 is a cross-sectional view of the same, and FIG.
FIG. 7 is a vertical sectional view of main parts of two other embodiments, and FIGS. 8 and 9 are plan and side sectional views of the drive shaft engaging member 6' of FIG. 7.
Figures 10, 11, 12, and 13 are longitudinal cross-sectional views of main parts of four other embodiments, and Figure 14 is a system in which the outward force from the hollow part of the drive shaft is applied not by fluid pressure but by a skewer-shaped cam rod. It is an example explanatory diagram. /...Hollow drive shaft! ...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. Figure 4 Figure 6 Figure 8 Figure 9 Figure 7

Claims (1)

[Claims] A number of collars slidably and rotatably fitted around the outer periphery of the drive shaft;
a friction transmission mechanism that transmits the rotation of the shaft to each of the collars, and a winding shaft for winding the sheet with or without a winding core fitted around the outer periphery of the group of collars; It applies an adjustable outward force to the inside, and is housed in a number of radial drive bodies at the position where the group of collars of this drive shaft are fitted, and has a pressure surface at the outer end facing in a direction that intersects with the shaft. , a radial driver whose inner end receives an extrusion force due to the outward force, and the extrusion force applied to the end of this driver body is converted into a larger axial force by the wedge action of the outer end pressure surface, and each of the collars A sheet winding shaft comprising: a pressure direction changing section for pressing; and a sheet winding shaft.