JPH0350567Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a cable take-off roller installed in an electron beam irradiation device or the like that irradiates an uncrosslinked polymer coated on a cable with an electron beam.

``Prior Art'' FIG. 2 shows the principle of an apparatus that crosslinks an uncrosslinked polymer covered with a core wire of a cable by irradiating an electron beam with an electron beam.

That is, a take-up roller 2 and an idle roller 3, which are made up of a large number of pulleys 1 around which the cable C is wound, arranged on the same axis, are arranged parallel to each other, and the cable C is placed across these rollers 2 and 3. The cable C is wound up and run as shown by arrows A and B in Figure 2, reciprocating the same location many times, and this cable C is irradiated with an electron beam from the electron beam source 4 as shown by arrow C in Figure 2. Due to the action of the wire, the polymer such as uncrosslinked polyethylene covering the core wire of the cable C is crosslinked.

"Problems to be Solved by the Invention" By the way, when crosslinking is carried out using the electron beam in an actual cable manufacturing line, a plurality of pairs of rollers 2 and 3 as shown in FIG. 2 are provided on the same axis.
A device is used that irradiates electron beams from a single electron beam source while running multiple cables in parallel.

That is, to explain the take-up rollers provided in the above-mentioned device, these take-off rollers 2A to 2D have their shafts 5 supported at both ends by bearings 6, 6, respectively, so that their axes are aligned as shown in FIG. A drive pulley 7 is attached to one end of each shaft 5, around which a drive belt (not shown) is wound to transmit drive force to each of the take-up rollers 2A to 2D.

In the above device, the running speed of each cable C is individually adjusted for each line by controlling the rotation of the drive pulley 7 of each of the scraping rollers 2A to 2D.

However, in the apparatus of the above system, the irradiation width W ₁ of each electron beam source (not shown in FIG. 3)
Since not only the take-up rollers 2A to 2D but also the bearings 6 of these rollers 2A to 2D or the drive pulley 7 are present in the interior, the irradiation width _W1 of the electron beam source is not effectively used, and the originally required irradiation width is W ₀ (If the width of each take-up roller 2A to 2D is w, then W ₀ =
There is a problem in that an electron beam source with an extremely large irradiation width W ₁ is required compared to the irradiation width W 1 (where the relationship 4w holds true).

Furthermore, if multiple electron beam sources with irradiation widths corresponding to the width w of each take-up roller 2A to 2D are installed, multiple expensive electron beam sources will be required, no matter how small the irradiation width is. At the same time, a control device and the like for each electron beam source are also required, which poses a problem of increasing the cost of the device.

The present invention was proposed in view of the above circumstances, and an object of the present invention is to provide a cable take-off roller that can effectively utilize the irradiation range of an electron beam source.

"Means for Solving the Problems" In order to achieve the above object, the present invention provides a first roller on a first shaft whose both ends are supported by bearings, and a connection between the first roller and the bearings. A second shaft having a hollow portion through which the first roller passes is provided between the first and second shafts, a second roller is provided on the second shaft, and both ends of the second shaft are connected to the second shaft. The shaft is supported by a fixed bearing provided inside one of the bearings and a rotary bearing provided on the first shaft.

"Function" With the above configuration, a plurality of rollers can be coaxially arranged and each rotatably supported, and the rollers can be arranged close to each other.

"Embodiment" Hereinafter, an embodiment of the present invention will be described with reference to FIG. In the figure, parts common to those in the conventional example are designated by the same reference numerals, and explanations thereof will be omitted.

Reference numeral 10 in the figure is a fixed bearing fixed to the floor or the like outside the electron beam irradiation range.

The fixed bearing 10 includes a solid first shaft 11.
is rotatably supported, and a first unit roller 12A around which a cable is wound many times is fixed to one end of the shaft 11, and a first unit roller 12A is fixed to the other end of the shaft. A drive pulley 7A is fixed to the drive pulley 7A.

The shaft 11 is a second shaft 1 formed in a hollow shape.
3, and the shaft end of the second shaft 13 is connected to a second fixed bearing 14 fixed to the floor or the like inside the fixed bearing 10, and the first shaft 1
1 and a rotary bearing 15 provided between the two. Further, a second unit roller 12B is fixed to one shaft end of the second shaft 13, and a second drive pulley 7B is fixed to the other shaft end.

The second shaft 13 is penetrated by a third shaft 16 which is also formed in a hollow shape, and the shaft end of the third shaft 16 is provided inside the second fixed bearing 14. It is supported by a third fixed bearing 17 and a second rotary bearing 18 provided between the second shaft 13 and the second shaft 13 . Further, a third unit roller 12C is fixed to one shaft end of the third shaft 16, and a third drive pulley 7C is fixed to the other shaft end.

The third shaft 16 is passed through a fourth shaft 19 which is also formed in a hollow shape, and the shaft end of the fourth shaft 19 is provided inside the third fixed bearing 17. The third shaft 16 is supported by a fourth fixed bearing 20 and a third rotary bearing 21 provided between the third shaft 16 and the third shaft 16 . Further, a fourth unit roller 12D is fixed to one shaft end of the fourth shaft 19, and a fourth drive pulley 7D is fixed to the other shaft end.
is fixed.

The take-up roller configured as described above is placed below the electron beam source together with an idle rotor (not shown) that is configured in almost the same way (the drive pulley is omitted from the take-up roller), and is similar to the conventional device. , each roller is used by winding the cable a plurality of times, and the drive pulley 1
By individually controlling the rotations of cables 2A to 12D, the speed of each cable running in parallel can be adjusted individually.

Further, between each of the unit rollers 12A to 12D, there only needs to be a minute interval l to the extent that their side surfaces do not come into contact with each other. Therefore, if the width of each unit roller 12A to 12D is w, then the electron beam source The irradiation width W ₂ is W ₂ = 4w + 3l, and approximately each unit pulley 12A to 12D
It is possible to irradiate all cables with an electron beam with an irradiation width equivalent to the sum of the widths of .

In the above embodiment, a roller having a four-stage configuration has been described, but it goes without saying that the roller may have a larger number of stages or a smaller number of stages.

Furthermore, the take-up roller of the present invention is applicable not only to the take-up roller of the electron beam irradiation device of the above-mentioned embodiment, but also to rollers for other purposes that are installed and used under conditions where the dimension in the axial direction is restricted. Of course it is possible.

"Effects of the Invention" As is clear from the above explanation, the present invention has a first unit roller attached to a first shaft whose both ends are supported by bearings, and a hollow part through which the first shaft is penetrated. a second shaft having a cylindrical shape, the second shaft being rotatably supported by a fixed bearing inside one of the bearings and a rotary bearing provided on the outer periphery of the first shaft; unit rollers, it is possible to drive them individually or control their rotation speed by simply providing a minimum clearance between both unit rollers, and multiple cables can be connected in parallel. When installed in a device that performs various operations while traveling, for example, an electron beam irradiation device, the electron beam irradiation width can be minimized.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of a take-up roller according to an embodiment of the present invention, Fig. 2 is a perspective view showing the principle of a conventional electron beam irradiation device, and Fig. 3 is a view of the take-up roller provided in the electron beam irradiation device. FIG. 2 is a vertical cross-sectional view showing a conventional example. 7A to 7D... Drive pulley, 10... Bearing, 1
1...Axis (first axis), 12A to 12D...Unit roller, 13...Axis (second axis), 14,1
7, 20... Fixed bearing, 15, 18, 21... Rotating bearing, 16... Axis (third axis), 19... Axis (fourth axis).

Claims (1)

[Scope of utility model registration request] A first shaft 1 whose both ends are supported by bearings 10, 10.
1 is provided with a first unit roller 12A around which the cable C is wound, and has a hollow portion between the first unit roller and one of the bearings through which the first shaft is passed. A second unit roller 12B is provided on the second shaft.
The second shaft is a fixed bearing 1 provided on the inside of the one bearing with the same axis line.
4 and a rotary bearing 15 provided on the outer periphery of the first shaft so as to have the same axis.