JPS583802Y2 - Winding shaft for holding the winding core - Google Patents

Description

[Detailed description of the invention] This invention is based on flexible strips such as plastic films and paper (
Regarding the winding shaft for winding the web (hereinafter referred to as "web"),
More specifically, it is a winding used for winding multiple narrow webs (hereinafter referred to as "multi-thread web") cut and separated from a wide web using a cutting machine or the like with appropriate winding tension on each winding core. This invention relates to a core holding winding shaft.

When winding up a multi-thread web, as shown in FIG. Generally, the material is wound around a core 5 made of cardboard or plastic material, which is attached to the core 4'.

By the way, in winding this kind of web, since the web 1 itself has local differences in thickness and elongation, the winding tension of the multi-filament web 3 that is cut and wound around the winding shaft 4 varies slightly. The reality is that

In order to compensate for such tension differences, a so-called "individual friction method" core holding winding shaft has been conventionally known, in which each winding core 5 is held on the winding shaft 4 by an independent frictional force. It is.

Figures 2 and 3 show typical cross-sections of the winding shaft, so in Figure 2, the inner wall of the winding core 5 attached to the winding shaft 4 is actuated in the radial direction by spring pressure or air pressure. For example, the friction member 6 is made from a cloth material such as felt or a leather material such as cowhide.
This is a winding shaft that winds up a multi-filament web 3 onto a winding core 5 while holding the winding core 5. FIG. This is a winding shaft for winding.

However, when using the conventional winding shaft as described above, the inner wall or side wall of the winding core 5 comes into direct sliding contact with the friction member 6, so the sliding contact portion of the winding core 5 is damaged and fine wear particles are scattered from the winding shaft. Furthermore, when high-speed winding is performed for a long period of time, the winding core 5 seizes on the winding shaft 4 due to frictional heat, which hinders the winding operation of the multi-filament web 3.

In general, in this type of winding work, the multi-filament web 3 wound around the winding core 5 is often transferred to the first or next process and subjected to other processing, and for this reason, the winding core 5 is It is often used repeatedly by going back and forth between processes.

Therefore, as described above, if the core 5 is damaged during the winding process, not only will it be impossible to wind the web properly, but it will also cause various drafts in the various operations in the next process, as those skilled in the art will often experience. .

Furthermore, fine abrasion particles are scattered during winding.
For example, this has been an extremely serious problem when winding webs such as photographic films, where the quality of the film is directly affected by the adhesion of dust.

The present invention is a winding shaft that eliminates the above-mentioned drawbacks of the conventional winding shaft for holding the winding core.In other words, the winding core itself is not damaged or the winding core is sewn onto the winding shaft, and each web is stabilized individually. It is an object of the present invention to provide a winding shaft for holding a winding core that enables winding.

The above-mentioned object of the present invention is to provide a friction member movable in the radial direction of the shaft on the outside of the tube that expands and contracts by increasing and decreasing the pressure in the hollow part of the winding shaft body; A core holding chuck is provided so as to be biased in the axial direction, and is distantly moved by a core holding winding shaft having a groove carved in the sliding contact portion of the chuck with the friction member.

The details will be explained below based on the embodiment of the present invention.

FIG. 4 is a partial side sectional view of a winding shaft for holding a winding core, which is an embodiment of the present invention (for explanatory purposes, one of the plurality of winding cores 5 fitted on the winding shaft 4 is shown). ) Figure 5 shows the X- in Figure 4.
An X cross-sectional view is shown.

The main winding shaft 4 has a reinforcing core material 8 in the center of the pipe 7, and a pneumatic source (not shown) is provided between the pipe 7 and the core material 8.
A tube 10 made of a rubber material or the like that is provided with a hollow portion 9 communicating with the pipe I and expands and contracts by air pressure in contact with the inner wall of the pipe I.
A plurality of holes 11 (in this case, 6
) is provided with a friction member 6 movable in the radial direction,
A chuck 12 for holding the winding core 5 is provided on the outside of the friction member 6.

This chuck 12 is made by dividing a cylindrical metal member into a plurality of pieces (three pieces in this case) in the axial direction.The inner surface of the chuck 12 is held on the pipe 7 via a radial bearing 13, and a spring 14 is attached to the outer surface of the chuck 12. The entire system is always connected to axis 1.
It is pressed in 5 directions.

A groove 15, which will be described later, is formed spirally from the axial direction in a portion of the inner surface of the chuck 12 that makes sliding contact with the friction member 6.

A thrust bearing 16 is provided adjacently between the housing chuck 12 and other chucks 12 located on both sides in the axial direction.

A core 5 for winding the multi-filament web 3 is mounted on the chuck 12.

Further, one end of the pipe 7 including the core material 8 is connected to a winding drive device (not shown), and the entire winding shaft 4 is driven by this drive device in a direction in which the multi-filament web 3 is wound up.

Next, the operation of the main winding shaft 40 configured as above will be explained.

First, when attaching the winding core 5 to the winding shaft 4, the air pressure inside the hollow part 9 is reduced to shrink the tube 10 (therefore, the friction member 6 moves in the axial direction) and the chuck 12 is reduced. Attach the winding core 5 to a predetermined position on the chuck 12 in this state,
Thereafter, the pressure inside the hollow portion 9 is increased to expand the tube 10 and the chuck 12 is expanded via the friction member 6, so that the core 5 is directly held by the chuck 12.

Conversely, when removing the winding core 5 from the winding shaft 4, the air pressure inside the hollow portion 9 is reduced to shrink the chuck 12, and the winding core 5 (or the winding shaft 4 itself) is moved in the axial direction and removed. υ In this way, the main winding shaft 4 tightly holds the winding core 5 on the chuck 12 during web winding and rotates both together, while transferring the frictional force for correcting the tension difference from the friction member 6 to the chuck 12.
The multi-filament web 3 is wound around the winding core 5 by being applied to the winding core 5 through the winding core 5.

Therefore, according to the present winding shaft 4, the winding core 5 is never damaged by the friction member 6 unlike the conventional winding core.

By the way, when the main winding shaft 4 is buttoned, the inner surface of the chuck 12 comes into sliding contact with the friction member 6 during web winding, so some wear powder from both members is generated between the two, but this friction powder is absorbed by the rotation of the shaft. As the particles are gradually accumulated in the spiral groove 15 provided on the inner surface of the chuck 12, they are not scattered outside the winding shaft 4.

Furthermore, when the groove 15 is provided on the inner surface of the chuck 12 and the button is pressed, heat generated by friction with the friction member 6 is transferred to the groove 15.
The chuck 12 itself will not seize even if the winding shaft 4 is driven at high speed for a long period of time.

Abrasion powder left behind in the buttons and grooves 15 is removed by cleaning at an appropriate time such as after the completion of work.

Furthermore, the frictional force can be adjusted arbitrarily by increasing or decreasing the pressure within the hollow portion 9 or by changing the sliding area of the friction member 6.

Although the details of the present invention have been described above based on one embodiment, the present invention is not necessarily limited to the above embodiment.As for the material of the friction member (friction member 6 that can be clicked in the above embodiment) used in the present invention, In addition to cloth materials such as felt, leather materials such as cowhide, fluorine-based, polyamide-based, phenol-based, and acetal-based resin materials, and oil-impregnated metal materials such as copper-based oil-impregnated bearings, fluorine-based resin materials are particularly selected. This is favorable in terms of the stability of frictional force.

Although it is possible to provide a plurality of grooves (grooves 15 in the above embodiment) in the sliding contact portion of the clutch for holding the winding core with the friction member in the radial direction or longitudinal direction of the shaft, it is possible to provide a stable frictional force. The spiral shape is particularly preferable because it is easy to collect and remove friction powder.

In addition, in the present invention, it is possible to use hydraulic pressure as a means for expanding and contracting the chuck, and it goes without saying that the number of chucks and friction members to be used can also be increased or decreased as necessary.

As detailed above, according to the present invention, the following remarkable effects can be obtained.

(i) Since the winding core is tightly held by the chuck and the chuck and the friction member are in sliding contact, the winding core will not be damaged during driving.

(1i) As a result of the above (i), the web can be wound with stable winding tension.

(:ii) As a result of (1) above, the life force of the winding core can be extended by 5 and costs can be reduced.

(1v) Since the abrasion powder generated between the chuck and the friction member is accumulated inside the take-up shaft and does not scatter outside, the abrasion powder does not adhere to the web.

M The frictional heat generated between the chuck and the friction member is absorbed by the inner surface of the chuck, making it ideal for long-term high-speed winding.
No seizure occurs on the take-up shaft even when

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing the web winding situation, Figs. 2 and 3 are sectional views of a conventional winding shaft for holding the core, and Fig. 4 is a partial sectional view showing an embodiment of the present invention. , FIG. 5 is a sectional view taken along the line X--X in FIG. 4. 1.3: Web, 4, 4', Winding shaft, 5: Winding core, 6: Friction member, 7: Pipe, 8: Core material, 9: Hollow part, 10: Tube, 12: Chuck, 13.16: Bearing, 15: Groove.

Claims (1)

[Scope of utility model registration request] A friction member is provided on the outside of the tube, which expands and contracts by increasing and decreasing the pressure in the hollow part of the winding shaft main body, so as to be movable in the radial direction of the shaft, and slides on the outside of the friction member to hold the winding core holding chuck on the shaft. The chuck is biased in the center direction, and has a spiral groove carved in the sliding contact portion of the chuck with the friction member, and each core for web winding mounted on the chuck is individually independent. A winding shaft for holding a winding core, which is held by a frictional force.