JPH0677414B2 - Electron beam irradiation device for ultra-fine coated wires - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to electron beam irradiation for an ultrafine coated electric wire in which the covered electric wire is irradiated with an electron beam and crosslinked while the covered electric wire repeatedly travels back and forth between capstans. It relates to the device.

[Prior art]

The first conventional example will be described with reference to FIG. In this conventional example, the sheaves 100 having grooves on the outer peripheral surface are arranged in two rows, and the shaft 102 has a bearing 10 as shown in FIG. 6a which is a sectional view taken along line aa of FIG.
It is pivoted through 3. Further, many sheaves 100 are arranged as shown in FIG. 6a. A scanner 104 for irradiating an electron beam is provided between the sheaves 100 and 100 rows, and the electron beam is emitted from the scanner 104 to the covered electric wire 106 that is introduced and introduced in the direction of the arrow and repeatedly travels back and forth between the sheaves 100 and 100 rows. It is done like this. Further, in order to reduce the tension applied to the covered electric wire 106 that repeatedly travels back and forth between the sheaves 100, 100, the shaft 102 is driven by the shaft drive motor 1 as shown in FIG. 6a.
There are also cases where the sheave 100 and the shaft 102 are rotated at the same angular velocity by forcibly driving at 08.

Next, a second conventional example will be described with reference to FIG. In this conventional example, a cylindrical capstan 110 having no groove is used, and the covered wire is irradiated with an electron beam from the scanner 104 while the covered wire repeatedly travels back and forth between the capstans 110, 110. At this time, the covered electric wire 106 is guided by the pin 114, and
The capstan 110 is forcibly driven by the capstan drive motor 112 as shown in FIG. 7a which is a sectional view taken along the line aa in the figure.

[Problems to be Solved by the Invention]

In the above-mentioned first conventional example, since the covered electric wire 106 is guided by the grooved sheave 100, when the diameter of the covered electric wire to be irradiated is small, the gap between the covered electric wires 106 becomes large and the electron beam The irradiation efficiency of is greatly reduced. Therefore, when the diameter of the covered electric wire is small, it is necessary to reduce the width dimension and groove width dimension of the sheave 100 and increase the number of sheaves,
Fine wire with a conductor cross-sectional area of 3 mm ² (outer diameter 1.95 mm) or less, for example, 0.
85 mm ² (outer diameter 1.04 mm), AWG30 (outer diameter 0.254 mm) and other ultra-fine conductors are coated with an insulator with a thickness of 0.8 mm. Increasing the number is practically difficult and, if at all possible, very expensive.

Further, in order to bring the degree of crosslinking of the covered electric wire to a predetermined value, it is necessary to irradiate the covered electric wire for a predetermined time, but when irradiating the ultrafine covered electric wire with the device of the first embodiment, As described above, since the irradiation efficiency is low and the number of sheaves, that is, the number of turn wires of the covered electric wire cannot be increased so much, the line speed of the covered electric wire cannot be increased and cannot be increased.

It should be noted that, instead of pivotally supporting the sheave 100 on the shaft 102, it is conceivable to forcibly drive the capstan using a capstan having a large number of grooves on the outer circumference, but in this case also, the irradiation efficiency described above is low. The problems that the speed cannot be increased and the device is expensive to manufacture basically remain unsolved.

In the second conventional example, if a thin pin is used as the pin 114 and the gap between the pins 114 and 114 is made small, the covered electric wire 106 can be wound many times around the cylindrical capstan 110, thereby improving the irradiation efficiency. At first glance, it is conceivable that the line speed of the covered electric wire can be increased and speeded up, but in reality,
When the number of windings of the covered electric wire wound around the capstan increases, the number of windings cannot be increased because the covered electric wire is loosened. When the winding width of the covered electric wire around the capstan (the horizontal gap between the inlet A1 and the outlet A2 of the covered electric wire) exceeds 500 mm, the covered electric wire is loosened and cannot be used. It is considered that the reason why the slack or the like occurs is that the coated electric wire is tension-controlled only on the inlet side and the outlet side thereof.

The present invention has been made in view of the above points, the irradiation of the electron beam to the ultra-fine coated electric wire is performed with high irradiation efficiency, the traveling speed of the irradiated ultra-fine electric wire can be increased, and the cost can be reduced. The present invention provides an electron beam irradiating device for an ultrafine covered electric wire.

[Means for Solving the Problems]

The electron beam irradiation device for an ultrafine coated electric wire of the present invention which solves the above-mentioned problem is that the large-diameter portion and the large-diameter portion are opposed to each other with a grooveless ultra-tapered taper capstan that is forcibly driven at a constant speed. Two rows of guide pins are arranged parallel to each other so that the covered electric wire that repeatedly travels back and forth between these taper capstans enters the taper capstan. The coated electric wire introduced from the side of the taper capstan is irradiated by the electron beam irradiation device while the electric wire repeatedly travels back and forth between the taper capstans, and the irradiated and crosslinked coated electric wire is sent out from the large diameter side of the taper capstan. It is characterized in that it is formed as follows.

[Action]

Since the present invention has the above-mentioned configuration, the taper capstan is reduced by reducing the interval between the guide pins in the row of guide pins provided near the inlet where the ultrafine covered electric wire that repeatedly travels back and forth between the taper capstan enters the taper capstan. It is possible to wind the covered electric wire a number of times around the cap and reduce the distance between the covered electric wires that repeatedly travel back and forth between the capstans. Moreover, the capstan is a taper capstan with a minute taper and is arranged so that the large diameter part and the large diameter part face each other, and the ultrafine coated wire is introduced from the small diameter part side, and after repeated reciprocation between the capstans, it becomes large. Since it is sent out from the diameter side, tension acts on the covered wire by the taper degree of the taper capstan, and exerts appropriate tension on the covered wire that repeatedly travels back and forth between the capstans. Therefore, even if the ultrafine coated electric wire is wound around the taper capstan a number of times and the winding width of the capstan is made sufficiently large, no trouble such as loosening occurs. According to the present invention, the covered electric wire is repeated between the capstans. The number of times of reciprocating traveling can be extremely increased.

Therefore, according to the present invention, the electron beam irradiation of the ultrafine coated electric wire can be performed with high irradiation efficiency and high traveling speed.

Further, according to the present invention, since the capstan is a grooveless capstan, it is easy to manufacture, and in particular, a taper having a minute taper degree of about several hundredths to several tens of thousands as described later. Can also be formed.

〔Example〕

 The details of the present invention will be described below with reference to the drawings of the embodiments.

FIG. 1 is a front view of an electron beam irradiation apparatus for ultrafine electric wires according to the present invention, FIG. 2 is a view taken in the direction of arrow II in FIG. 1, and FIG. 3 shows a taper capstan and a guide pin in the apparatus according to the present invention. It is an explanatory view (plan view) for explaining.

In the figure, 10 is a concrete electron beam shielding room. Two rails 12 are provided on the floor of the shielded room 10, and a covered electric wire carrier 14 is movably mounted on the rail 12. The illustrated transporting device 14 is a device for extra-fine coated electric wires, and when irradiating a relatively thick covered electric wire with an electron beam, another device for a large diameter, which is also movably mounted on the rail 12, For example, the device shown in FIG. 6 is used.

The transfer device 14 includes a base 16, a support frame 16a, taper capstans 18 and 18 with a small taper without a groove, and a drive motor 2
0 (both made of stainless steel) and the like, and the ultrafine coated electric wire 22 to be irradiated with an electron beam is introduced from the inlet A1 and travels in the direction of the arrow, repeatedly travels back and forth between the capstans 18, 18, and is delivered from the exit A2. Is formed.

A guide pin 36 is provided at a position immediately before the ultrafine covered electric wire 22 that repeatedly travels back and forth between the taper capstans 18, 18 is caught in the taper capstans 18, 18.
As shown in FIG. 5 described later, the guide pins 36 are arranged in a row at a predetermined interval W that sandwiches the ultrafine covered electric wire 22, and guides the covered electric wire 22 so as to be wound around the taper capstan at short intervals.

The power of the drive motor 20 that drives the taper capstan is transmitted to the taper capstans 18 and 18 via the bevel gear 24, and the left and right taper capstans 18 and 18 are forcibly rotated in the same direction at a constant velocity (constant angular velocity). It

An ozone isolation box 26 is provided between the taper capstans 18, 18. On the upper side of the ozone isolation box 26 is a covered electric wire 22.
There is a window hole 28 through which the ozone isolation box 26 is exposed.
Is also open. An exhaust duct (not shown) is connected to the ozone isolation box 26 to exhaust ozone generated by the electron beam inside the ozone isolation box 26. Reference numeral 32 is a guide roller attached to a bracket 34 fixed to the base 16.

A scanner 40 of an electron beam generator 38 is arranged on the upper surface 30 of the ozone isolation box 26, and the scanner 40 is connected to the ultra-fine coated electric wire.
An electron beam is emitted toward the wire 22 to cross-link, for example, the polyethylene coating of the covered electric wire 22.

As shown in FIG. 2, the taper capstan 18 has a small diameter portion 42.
With the large diameter portion 44, the taper degree is set to a slight degree which will be described later in detail. As shown in FIG. 3, the left and right tapered capstans 18, 18 are arranged so that the small-diameter portion 42 and the large-diameter portion 44 are opposed to each other. Both taper capstans 1 that are introduced from the small diameter portion 42 into the taper capstans 18 and 18 and face the ultra-fine coated electric wire 22 over the entire length L of the capstan.
It is configured such that it is repeatedly reciprocally wound between 8 and 18, and the ultrafine covered electric wire 22 is sent out from the large diameter portion 44 and wound on the bobbin 47.

As mentioned above, the taper capstan 18,18 is the drive motor 20.
Since it is forcibly driven at a constant speed by the, the coated electric wire 22 wound in order from the small diameter portion 42 to the large diameter portion 44 is applied with an appropriate tension depending on the taper degree of the taper capstan 18, 18 The covered electric wire 22 runs without slack.

The taper of the taper capstan 18,18 is 2
The taper degree is set so that the coated electric wire 22 does not break even when the wire 2 is run at a high speed, and an appropriate tension is exerted so that the extra-fine coated electric wire 22 does not loosen. The taper degree is set by an experiment, and is set to about several hundredths to several tens of thousands, depending on the size of the electric wire. Incidentally, reference numeral 48 in FIG. 3 denotes a pin holder for fixing the guide pin 36, and by replacing the holder 48, it is possible to easily change the interval between the guide pins according to the size of the irradiated wire.

As shown in FIG. 4, which is an enlarged view of the IV portion of FIG. 1, the guide pins 36 are separated from each other by a width B in the left-right direction (the traveling direction of the electric wire) of the drawing, and in the direction perpendicular to the paper surface of FIG. They are arranged in a row at predetermined intervals W (Fig. 5) sandwiching the covered electric wire 22 in the longitudinal direction of the stun. The guide pins 36, 36 ... Are fixed to the pin holder 48, and the pin holder 48 is the pin holder 48.
The arm 50 is pivotally supported by a shaft 50 connected to the arm 52. Arm 52
Is fixed to the support frame 16a (FIG. 1) on the base 16. Therefore, the pin holder 48 is rotatable about the shaft 50 in the arrow R direction.

A guide plate 54 is fixed to the end of the pin holder 48,
An arcuate guide groove 56 centered on the shaft 50 is formed in the guide plate 54. A pin 58 is fitted to the lower end of the guide groove 56, and the pin 58 is held by the arm 52. The upper end of the guide groove 56 is a recess 56a into which the tip of the pin 58 fits.
Are formed. The shaft 50 is a well-known torque setting device 59 (manufactured by Miki Pulley Co., Ltd., trade name torque tender) fixed to the arm 52, and is prevented from rotating until a predetermined rotational torque acts on the shaft 50.

Proximity switch on top of arm 52 via bracket 60
62 is provided, and the proximity switch 62 is fixed at a position where the upper end of the guide plate 54 is detected. Proximity switch 62
1 is transmitted to an electric circuit for controlling the drive motor 20 shown in FIG. 1, and when the guide pin 36 rotates in the direction of arrow R, the guide plate 54 rotates integrally and the proximity switch 62.
Is out of the detection range. This is detected and the drive motor 20
Is supposed to stop. As shown in FIG. 5 which is a view on arrow V of FIG. 4, the pin 58 is biased toward the guide groove 56 by the coil spring 64.

Next, the operation of the above embodiment will be described. As shown in FIG. 1, the ultrafine coated electric wire 22 is guided along the arrow by the taper capstan 18 on the right side which is forcibly driven, and the ozone isolation box
In the inside of 26, first, the upper surface of the ultrafine covered electric wire 22 is irradiated with the electron beam from the scanner 40, and then it is inverted by the left taper capstan 18 which is also forcibly driven and the surface opposite to the above is again irradiated with the electron beam. This irradiation is performed for the number of times that the ultrafine covered electric wire 22 is wound between both taper capstans 18, 18, and the crosslinking of the ultrafine covered electric wire 22 is completed.

During this bridging operation, the ultrafine coated electric wire 22 travels at high speed between the taper capstans 18 and 18, but the coated electric wire 22 receives an appropriate tension according to the taper degree between the taper capstans 18 and 18, The ultrafine covered electric wire 22 runs in a state where it does not break and does not come loose.

By the way, while the ultra-fine coated electric wire 22 is running, the joint portion, the entangled portion of the electric wire, or the crossing portion due to the entanglement or the wire runout may push the guide pin. It may happen.

Therefore, in the above-described embodiment, as shown in FIG. 4, when the torque above the predetermined torque is applied to the shaft 50 of the pin holder 48 to which the guide pin 36 is fixed, the holding force of the shaft 50 is resisted. Then, the entire pin holder 48 rotates in the direction of arrow R, and when the pin holder 48 is out of the detection range of the proximity switch 62, the traveling of the ultrafine coated electric wire 22 is stopped, and the breakage of the guide pin 36 and the disconnection of the ultrafine coated electric wire 22 are prevented. There is. The torque setting device 59
Instead of the (torque tender), a torque motor, an electromagnetic clutch, or other device that can continuously adjust the torque can be used.

[Effects of the Invention] As described in detail above, according to the device of the present invention, it is possible to irradiate an electron beam onto an ultrafine coated electric wire with high irradiation efficiency, and also to increase the traveling speed of the electric wire to be irradiated, thereby increasing the speed. can do. Moreover, the device according to the present invention can be manufactured at low cost, and the effect of the present invention is remarkable.

[Brief description of drawings]

FIG. 1 is a front view showing an electron beam irradiating device for ultrafine coated electric wires according to the present invention, FIG. 2 is a view taken in the direction of arrow II in FIG. 1, and FIG. 3 shows a taper capstan and guide pins in the device according to the present invention. Explanatory diagram for explaining, FIG. 4 is an enlarged view of IV portion of FIG. 1, FIG. 5 is a view taken in the direction of arrow V of FIG. 4, FIG. 6 is an explanatory diagram showing a first conventional example, and FIG. 6 is a sectional view taken along aa in FIG. 6, FIG. 7 is an explanatory view showing a second conventional example, and FIG. 7a is a sectional view taken along aa in FIG. 14 ... Coated wire carrier, 18 ... Taper capstan, 20 ...
Drive motor, 22 ... Extra fine coated wire, 36 ... Guide pin, 38
… Electron beam generator, 40… Scanner, 59… Torque setting device,
62 ... Proximity switch.

Claims (1)

[Claims] 1. Tapered capstans without grooves, which are forcibly driven at a constant speed with respect to each other, are arranged in parallel in two rows so that the large diameter portion and the large diameter portion rotate in opposition to each other. A covered wire that travels back and forth between the stans repeatedly enters the taper capstan.A row of guide pins is provided near the entrance to guide the covered wire, and the covered wire introduced from the small diameter side of the taper capstan is tapered. An ultrafine coated electric wire, which is formed so as to be irradiated by an electron beam irradiating device during repeated reciprocating travel between capstans and to deliver the irradiation-crosslinked coated electric wire from the large diameter portion side of the taper capstan. Electron beam irradiation device.