JP2003291925A - Film welding apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve a center sealing roll which has no thermal effect on bearing lubricants. <P>SOLUTION: Each rotor 11 is set on respective vertical shafts 10 disposed to a pair of cylindrical bearings 20 arranged between upper and lower table base plates 21 and 22, and by using a plurality of screws 24, each rotor 11 and each vertical shaft 10 are joined to each other. Butt-seam edges of a moving strip film are welded to each other by an annular heater 32 disposed inside each coronary skirt 31 of both the rotors. An annular liquid tank 34 fixed on the upper face of the upper table base plate 21 isolates ball bearings 25, which are substantial bearings of the inside of the cylindrical bearings 20, from the annular heaters 32, and protects lubricants held by the ball bearings 25 from heat by means of a simple structure. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a center seal roll which is used to weld both side edges of an elongated strip-shaped film in a palm shape along the longitudinal direction and to form the film into a tube.

[0002]

In welding the abutment edge of the film, the welding edge is clamped by a pair of rollers and both rollers are rotated in response to the movement of the film, and the rollers are installed in the roller. This is a structure in which the roller is heated by a heater, and therefore, there is a structure provided with a cooling means for preventing heat dispersion of the heater.

Looking at the cooling means, the gearbox for driving the rollers is sealed with a cooling liquid, and the gear and the drive shaft portion are cooled by the liquid. There is a drawback in that the lubricating oil of the bearing part is affected by heat because the important point is protection.

[0004]

SOLUTION: The present invention is a center seal roll for preventing heat conduction to a bearing, wherein a circular rotor is fixed to upper ends of a pair of vertical shafts supported by a table substrate via the bearing, and the lower rotors of both rotors are fixed. A center seal roll, in which ring heaters are respectively arranged in coronal skirts hanging down from the side periphery, and both side edge palm portions of the strip-shaped film are welded by the pinching rotation of the both rotors, in a form surrounding the vertical axis. In addition, an annular liquid tank in which the cooling liquid circulates is arranged between the bearing and the ring heater, and the drive gear groups of both rotors are arranged below the bearing. Thus, the liquid tank is located between the lower table base and the upper rotor and surrounds the vertical axis. That is, the heat of the ring heater installed inside the coronal skirt of the rotor does not reach the bearing of the table substrate due to the presence of the cooling liquid of the liquid tank, and the lubricant of the bearing is protected from heat with a simple structure. To achieve the purpose.

[0005]

SOLUTION: As shown in FIG. 2 which is a simple plan view, two circular rotors 1 supported by a pair of vertical shafts 10.
1, 12 are arranged by pressing a part of the peripheral surface thereof,
Two drive pinions 14 each supported on the core shaft 13
And the gear 15 fixed to the both vertical shafts 10 are engaged with each other so that both rotors 11 and 12 are interlocked in the arrow direction.

More specifically, as shown in FIG. 1 which is a sectional view of the previous figure, the vertical shaft 10 is supported by a pair of cylindrical bearings 20 arranged between the upper and lower table bases 21 and 22, respectively. The circular rotors 11 and 12 are placed on the vertical shaft 10 through a heat conductive material 23 having an inverted cup shape, and the rotors 11 and 12 and two vertical shafts are mounted using a plurality of screws 24. The vertical shaft 10 is supported by the cylindrical bearing 20 through the ball bearings 25 and 26 which are substantially bearings inside the upper and lower ends of the cylindrical bearing, that is, inside the upper and lower table bases 21 and 22. To do.

A drive pinion 14 integrated with the core shaft 13 supported on the upper and lower table surface plates 21 and 22 is engaged with a gear 15 fixed to the vertical shaft 10, while an umbrella integrated with the drive pinion 14 is provided. A bevel gear 30 fixed to a driving shaft 29 is engaged with the gear 28, the pair of rotors 11 and 12 is rotated by the power of the driving shaft 29, and a ring arranged in the coronal skirts 31 of both rotors. The heater 32 welds the moving band-shaped film abutment edge. In this case, the annular liquid tank 34 fixed to the upper surface of the upper table base 21 is connected to the annular heater 32 at the upper portion to form the annular heater 32. Is separated from the rotor 11, the rotor 1
1 and 12 rotate independently.

A tube 35 connected to the liquid tank 34
Is for injecting a cooling liquid into the tank and for promoting the circulation of the cooling liquid. Therefore, heat conduction from the heater 32 to the ball bearing 25, which is an upper bearing, is blocked, and at the same time, the peripheral surface of the vertical shaft 10 is prevented. It can be cooled to suppress heat conduction in the vertical shaft 10, and the drive gear group can be used for the bearing 2
It is arranged in the region below 5 to prevent the oil from seizing on the gears.

Further, as shown in FIG. 3, circular rotors 11 and 1
The pair of preheating bars 35 at the two front positions are supported by the machine base 37 via the parallel links 36. As shown in FIG. 5, both of the preheating bars 35 are provided with pipe heaters 38 therein, and a gap between the bars is held between the bars to form a chisel edge 41 of the tube film 40.
Is a means for suppressing the amount of heat required in the circular rotors 11 and 12 to prevent the lubricant from being burned on the rotors when they pass, and is connected to each of the parallel links 36 on both sides. The pair of preheating bars 35 are connected to the operating piston 46 of the drive cylinder 45 via the pair of V-shaped arrangement lot bars 42, 43, and the gap value of both preheating bars 35 is changed by the operation of the piston 46. It is possible to control the amount of heat added to the film.

[Brief description of drawings]

FIG. 1 is a cross-sectional view taken along the line I-I of FIG.

FIG. 2 is a plan view of a circular rotor

FIG. 3 is a plan view of the preheating bar.

[Figure 4] Side view of the previous figure

5 is a view taken along the line V-V in FIG.

[Explanation of symbols]

10 ... Vertical axis 11, 12 ... Circular hole rotor 14 ... Drive gear group 20 ... Cylindrical bearing 21 ... table base 25 ... Bearing 31 ... Coronal skirt 32 ... Ring heater 32 34 ... Annular liquid tank 35 ... Preheat bar 36 ... Parallel link 40 ... Tube film 41 ... Gassho edge 46 ... Adjusted lot

Claims (5)

[Claims] 1. A circular rotor is fixed to each of upper ends of a pair of vertical shafts supported by a table substrate via bearings, and ring heaters are respectively arranged in coronal skirts hanging from the lower periphery of the rotors. A center seal roll for welding both sides of the band-shaped film by rotating the two rotors under pressure, wherein a cooling liquid circulates between the bearing and the ring heater so as to surround the vertical shaft. An apparatus in which a tank is arranged and the drive gear groups of both rotors are arranged below the bearing. 2. An inverted cup-shaped material having good thermal conductivity is disposed inside the ring heater while being covered with the vertical shaft, and the vertical shaft, the material having good thermal conductivity, and the upper rotor are integrally fixed. 1. The device according to 1. 3. The apparatus according to claim 1, wherein the liquid tank fixed to the base is also integrally connected with the ring heater to separate from the rotor. 4. The apparatus according to claim 1, wherein a pair of preheating bars are installed in front of both rotors in a direction of movement of both sides of the band-shaped chimneys so as to keep a passage gap between the chiral edges. . 5. The apparatus according to claim 4, wherein a pair of preheating bars are supported on the machine base via parallel links so as to be movable in parallel, and a gap between the preheating bars can be adjusted.