US1750487A

US1750487A - Paper-reeling machine

Info

Publication number: US1750487A
Application number: US137345A
Authority: US
Inventors: Okuura Wasaburo
Original assignee: Individual
Current assignee: Individual
Priority date: 1925-10-13
Filing date: 1926-09-23
Publication date: 1930-03-11
Anticipated expiration: 1947-03-11
Also published as: GB271710A; DE448774C; FR622794A

Description

March 11, 1930. w. OKUURA 1,

PAPER REELING nucamg Filed Se t, 25, 1926 J27 yen/0 W. O/(uu mp UNITED STATES wasannno on ons, on ammo-arm, arm

remix-ammo iracnmn a lication filed se cember es, mac, Serial no. 137,345, and in Japan mm 13,1925.

Thisinvention relates to. improvements in a paper reeling machine which continuously reels up paper coming from a paper making machine at a constant tension.

'nThe object of this invention is to provide an automatic electric speed-governing means by which thereel increases or decreases its speed, automatically .in accordance with decrease or increase of tension of the paper I to be reeled, so that the tension is always conpaper reeling machines but which is noisy.

2 and cannot sensitively govern the speed of a --ree Y A further object of this invention is toprovide a reel with suction means therein, so that a free end of paper can be easily, moved to adhere to the surface of the reel which gets toits working position. In a known" reeling machine, a plurality of reels, for exampl'e,'six in -number,'are mounted on a rotary frame in radial direction at the same distance from the axis of the frame, and the frame rotatesintermittently when the reel ,in'th'e working position has reeled up paper thereon, so as tobring the next reel to the working position. Such a rotary frame with reels thereon is used also in this invention.

. In-the present invention an induction motor isdirectly coupled to each reel and the reels as well as the motors are kept on the rotary frame. All 'ofthe motors, for example, six, are supplied with electric current from .an extraneous source, and the rotor armature of each motor when it 1s in working stator coil of another inductor motor through a series of rings described-later'on. By this .with the second inductor motor one-by one,

position is electrically connected with the .theilatter motor being-called as an idle-motor in this specification. The idle-motor is louded w1th such a load that the amount of the load proportionally varies with change of its which its normal tension is at once resumed.

But as the speed of the reel-motor thus increases, that is to say, as the magnetic slip of its rotor decreases, the voltage induced in the rotor instantaneously drops, so that the rotor ofthe idle-motor connected to the reelmotor decreases its speed. When the rotorspeed' of the idle-motor decreases, the load on the rotor decreases, and the stator-current also decreases. Thus the rotor-current of the reel-motor decreases, 'so that the torque of the reel motor is decreased, a corresponding decrease in voltage in the rotor is accentuated due to the kind of load imposed upon the idle motor, and the speed of the reeled motor is increased. This increase of. speed quickly winds up the slacked paper .till the papertensi on increases up to the normal value. 'When the papertension is too large, the two motors cooperate reversely to the above and always govern the speed of the'reel to keep the proper tension of the paper. p

The details of my invention will be further described, reference being had to the ac I companying drawings.

Fig. 1 is a. plan view of a paper reeling -machine according to my invention.

Fig. 2 is asec-tional side elevation of Fig. 1. Fig. 3 is a diagrammatic view of the'electrical connection between the reel-motors and idle motors.

Fig. 4 is a front elevation of a vacuum distributing means for the reels, and

' Fig. '5 is a sectional side elevation ofthe same'."' In the drawing, 1 is a reel,.six of which, in this instance, are mounted in bearings provided on, a rotary frame 4 mounted. on a" shaft 3. Each reel is directly coupled with p 7 I I v an induction motor 6 through a coupling and is driven by the motor. The motors are held on the frame 4 on which the reels are distributed in radial direction and are po-' 5 sitioned at constant distance from the axis as clearly showndn Fig. 2.

Each reel is made of a hollow cylinder with a number of small perforations over the surface, and the end opposite to the motor is connected through a pipe to a sourceof vacuum. In Fig. 5, is a disc firmly held on the frame of the machine, which is provided with a vacuum pipe .16. 17 is a disc firmly held on the shaft 3, and six pipes 18 run 15 from this disc to the ends of the six reels.

The surfaces of the discs15 and 16 are close- 1y kept in contact with each other, and only the pipe 18 of the reel'which is in the working position registers with the vacuum pipe 20 16, so that only the reel in the Working position is connected to the source of vacuum. The shaft 3 is driven by a motor 12 through worm and worm gear 11 and spur gears 8'. The motor 12 runs intermittently. Intermit- 2 tent operation of the motor 12 is regulated byany known means which closes a switch in the circuit of the motor when the reel in working position has reeled up paper till it attains to a predetermined diameter, and then opens the switch when the rotary frame has turned to such a position that the next reel comes to the working position.

W 14 is a series of rings firmly fixed on the machine frame concentrically to the shaft 3 and controlling the electrical connections be- .tween the outer electric source and the reelmotors 6, and those between the rotors of reel-motors and stators of idle-motors 13 and 13. The rings comprise three groups a, b and a, and each group consists of three rings. Each ring is insulated from the other rings and from the frame of machine. Fivesixths of the puterperiphery of the rings is covered by insulation and the metallic sur- 6 face exposed in the remaining one-sixth part,

and all of the rings are arranged in such a manner that the metallic part extends in the same'direction.

Each ring of the first group a is connected to each line i of a three-phase alternating current source, ;.and six sets of brushes distributed on the rings are connected to each of the six reel-motors 6 as shown in Fig. 3. Each set of the brushes consists of three brushes, respectively contacting with each of the three rings of the first group a, and each brush is connected to each phase of the stator of the corresponding three phase induction motor 6.

W The second and third groups of rings have three sets of brushes respectively (each set of brushes consisting of three brushes and each brush being electrically connected to each phase of the rotor of the motor 6 through a 11 i and the three sets of brushes on the second group are connected to three alternate reel-motors, while the three sets of brushes on the third group are connected to the three remaining reel-motors, and the brushes on the second group and those on the third group are displaced on the periphcry in the same angular distance.

Fig. 3 shows the electrical connection above described. It shows, however, only the connection of one phase of each motor, therefore, one ring, one line or one brush should be understood as three rings, three lines or three brushes respectively. The first,

second and'thirdgroups of rings, a, b and 0, are of same diameter, but the are shown in Fig. 3 as concentric rings. d d d d and d are lead lines connecting the stator of each reel-motor to the first group of rings a, e e and eg' connect the rotor of the motors A, A and A with the third group ring c and f f and f connect the rotor of the motors B,- B and B with the second group ring I). The line 9 is a lead wire to the stator of the idle-motor 13 from the third group of rings while the line b is that of idle-mo- 0 tor 13 from the second group of rings. The lead wired from outer source of three phase alternating current is connected to the first group of rings. The lines 71, k and g are al- Ways in electrical connection with the rings a, b and 0, respectively, while other lines get in electric contact with the rings only one sixth part of the periphery.

Each idle motor drives a blower 9 and is provided with a frictionbrake 10.

Suppose a reel A is in the working position W, then the motor A (the motor for the reel A is denoted by A) receives current from the line 2', and its rotor is electrically connected to the stator of the idle motor 13 through the lines e and 9.

When the reel A has reeledpup paper suflicient in length and gets'td a predetermined diameter, the frame 4 with all the reels and reel-motors turns 60 degrees as above de-' scribed. When the frame turns about 30 degrees or to the middle point (Fig. 3 shows the positions of the members at thls point), the brushes of lines (l and 6 come out of electric contact with the rings a and c or the lines 116 i and 9, while the brushes of lines p3 and f get in electric contact with the rings a and b or the lines 2' and h, so that the reel A and the idle-motor 13 stop and reel B and the idle-motor 13 begin their rotation.

When the working reel is full of paper, the

aper which is being reeled on the roll is cut y means of a known mechanism, which is actuated by an electric magnet exc ted at the proper moment, and the free end of paper is 125 easily attached to the surface of the reel B by the suction of its interior vacuum. In this way, the reel motors come in operation one after another and the idle motors rotate alternatively. The reel-motors A, A; and A,

' reel motors B, B and B cooperate with the idle motor 13", and the speed of the reelmotors is automatically governed by the idlemotors as before described.

If the speed of the reel is required to be changed in accordance to the quality of paper to be reeled, the load on the idle motor should be changed. If the pressure of the friction brake 10 or the delivery area of the blower 9 on the idle-motors is changed, the speed of reel-motors can be easily changed.

The vacuum pipe 18 is connected to a vacuum tank19 which is connected to a vacuum 20. since vacuum is required only when a new reel begins torotate, the vacuum pump is not required to be working continuously, therefore, in the example shown in the drawing, it is driven operates intermittently. 7

Of course the brushes should be always kept in definite positions relative to the reel motors and rotate intermittently togetherwith the reel-motors along the periphery of the rin s.

Wha I claim is In a paper comprising a plurality of reels mounted in a rotary frame, each brought into working position by intermittent rotation of said frame,

a plurality of induction motors one for. each reel, to the rotorsof which the reels are coupled, and two'auxiliary motors, means connectmg the rotors of the alternate reel motors to the stator of one of said auxiliary motors while the rotors of the remaining reel motors are connected to the stator of the other auxiliary motor, of three groups of three rings and three groups of rushes contacting thereon, each of the rings being covered for five-sixths of its peripheral surface with insulatiniematerial,

the three rings of the first group ing electrically connected with each phase of three phase alternating current from an external source and with the rotors of six reel motors and the three rings of the second and thir groups being electrically connected with the stators of the two auxiliary motors and with the rotor of six reel motors, and the time of electrical connection of the external source with the reel motors and that of the auxiliary motors being controlled by the proper position of the brushes on the rings.

In testimony whereof I hereunto aflix my signature.

WASABURO OKUURA.

by the motor 12 which reeling machine of the type.

the connecting means consisting