JP5465993B2 - Roll paper feeding device - Google Patents

Description

  The present invention relates to a roll paper feeding device, and more specifically, a roll paper wound around a reel is nipped by a conveyance roller rotated by a motor capable of rotating forward and reverse, and is fed out by a predetermined amount, and the fed roll paper is cut. It is related with what rewinded the remainder after being wound on the said reel. Here, the roll paper refers to a paper tape wound up in a roll shape, a recording paper, a stamp binding, or other similar thing.

  For example, in a stamp vending machine, a reel on which a roll of stamps (a large number of consecutive stamps) is wound is loaded on a rotating shaft, and the stamps pulled out from the reel are clamped by a transport roller, and the transport roller The postage stamp is fed out by a predetermined amount by rotating it forward with a motor, cut at the rear end separation area of a predetermined number of stamps from the leading edge and discharged to the outlet, and then fed back by reversely rotating the transport roller with a motor. The remainder of the spelling is rewound onto the reel.

  In an automatic ticket vending machine, a reel on which a roll-shaped recording sheet is wound is held on a rotating shaft, the recording sheet pulled out from the reel is held by a conveying roller, and the conveying roller is rotated forward by a motor to record the recording sheet. The sheet is printed between the leading end and a predetermined length position, the recording sheet is further fed a predetermined length, cut at a predetermined length position from the leading end to create a ticket, etc., and discharged to the outlet. The recording paper is rewound until the transported roller is reversely rotated by a motor and the cut leading edge returns to a predetermined position.

  In such a roll paper feeding device that performs partial feeding and partial rewinding, a pair or a plurality of pairs of conveying rollers are rotated in a roll paper feeding direction and a rewinding direction by a motor that can rotate forward and backward. In both cases, the roll paper tends to be slack between the reel and the transport roller when the forward rotation of the transport roller is stopped and when the reverse rotation is stopped. This slackness is unfavorable because it affects the feeding accuracy, deforms the roll paper, and causes the leading end of the roll paper to protrude into the receiving port in a delusion.

  The principle of this type of roll paper feeding device is shown in FIG. In this type of apparatus, one end 23a of the roll paper 23 wound around the reel 22 held by the reel drive shaft 21 is sandwiched between a plurality of pairs of transport rollers 24 and 25, and a position mark on the roll paper and the amount of rotation of the transport roller. Using appropriate means such as detection means, the roll paper 23 is fed out by a fixed length via a motor 26 capable of rotating in the forward and reverse directions and a transmission belt 27. The reel 22 is required to rotate dependently on the transport rollers 24 and 25 so that the roll paper is not loosened or conversely becomes a load of the feeding operation.

  Some of these devices require both forward and reverse movement of the roll paper. In this case, it is necessary to rotate the reel so that the roll paper does not become slack in both the forward and reverse directions. However, the relationship between the rotation speed of the roll paper and the peripheral speed changes depending on whether the roll paper is far from the core (beginning of use) or close to the core (end of use). It is impossible to synchronize completely, and rotation is transmitted by frictional force, and appropriate tension (tension) is maintained by sliding appropriately.

FIG. 6 shows the prior art. The method for driving the roll paper in the forward and reverse directions is the same as in FIG. A take-up roller 28 is fixed to the reel drive shaft 21, and the rotational force of the take-up motor 31 is transmitted via a slide roller 29 and a belt 30. The take-up motor 31 has a variable number of rotations. For example, (a) when feeding in the forward direction, a rotation speed (circumferential speed) of about 1/3 to 1/10 of the feed amount of the transport rollers 24 and 25 is given. Apply appropriate tension to the roll paper. (b) When winding in the reverse direction, the roll paper is wound by giving a rotational speed (circumferential speed) based on the specifications of the apparatus.
Further, the sliding roller 29 is in contact with the winding roller 28 at the contact point 29a, but the contact pressure is kept constant by an urging means (not shown), and a frictional force (torque) that can be transmitted at the contact point 29a. Is constant. That is, the value is sufficiently smaller than the torque of the transport roller so as not to affect the feed amount of the transport roller, and the difference in peripheral speed at the beginning and end of use of the roll paper is absorbed.

  However, in a conventional roll paper feeding device that partially feeds and partially rewinds, a motor for rotating the transport roller in the roll paper feeding direction or the rewinding direction and a reel driving shaft are driven to rotate. The two motors are controlled separately to prevent the occurrence of slack, and the winding roller 28, the sliding roller 29 and the biasing means change the peripheral speed at the beginning and end of use of the roll paper. Was dealing with. Accordingly, the conventional apparatus has a complicated configuration, a large number of members, and a problem of increasing the size.

JP-A-5-42738

  The present invention has been made in view of the above points, and the problem is that the configuration is simplified by using a single motor, and the roll paper is slack when the roll paper is fed and wound. It is an object of the present invention to provide a roll paper feeding device that can prevent the above-described problem.

  In order to achieve the above object, the present invention can sandwich the leading end of a roll paper wound around a reel supported by a reel drive shaft by a pair or a plurality of pairs of transport rollers, and the transport rollers can be rotated forward and backward. The roll paper is rotated forward by one motor to feed a predetermined amount of roll paper, and after a part of the fed roll paper is cut, the remaining roll paper fed out by rotating the transport roller backward by the motor is removed. In the roll paper feeding device to be wound around the reel, (a) a rotational force in the feeding direction is transmitted to the transport roller when the motor rotates forward, and a rotational force in the pull-back direction is transmitted to the transport roller when the motor rotates backward. 1 transmission means, and (b) a second transmission means for transmitting a rotational force in the winding direction weaker than a rotational force in the feeding direction of the transport roller to the reel drive shaft during forward rotation of the motor; c) third transmission means for transmitting a rotational force in the winding direction to the reel drive shaft when the motor rotates in the forward direction and not transmitting a rotational force to the reel drive shaft during the reverse rotation of the motor; The third transmission means for adjusting a deviation associated with a change in the winding diameter of the roll paper between the peripheral speed of the transport roller and the peripheral speed of the roll paper on the reel drive shaft during reverse rotation of the motor. And a tension adjusting means added to (1).

  The first transmission means includes a toothed pulley fixed to the rotating shaft of the motor, a toothed pulley fixed to the rotating shaft of the conveying roller, and a timing belt wound between the pulleys. (Claim 2).

  The second transmission means is characterized in that a roller fixed to the reel drive shaft is brought into contact with the surface of the timing belt with an appropriate frictional resistance.

  The third transmission means is provided on the rotating shaft of the motor or on the reel drive shaft, and the pulley with one-way clutch that the clutch is ineffective when the motor is rotating forward and the clutch is effective when the motor rotates in reverse. And a pulley provided on the reel drive shaft or the rotation shaft of the motor, and a transmission belt wound between the pulleys.

  The tension adjusting means is configured by using a slipperable belt as a transmission belt wound between a pulley with a one-way clutch and a pulley provided on a reel drive shaft or a motor rotation shaft. (Claim 5).

  According to the first aspect of the present invention, the main components of the roll paper feeding device are one motor, first, second and third transmission means and tension adjusting means, so that the configuration is simple. It is possible to effectively prevent the slack from occurring both when the roll paper is fed and when it is wound.

  According to the second aspect of the present invention, the roll paper can be reliably fed and wound up by a predetermined amount.

  According to the invention of claim 3, it is possible to apply an appropriate back tension to the roll paper fed out with a simple structure.

  According to invention of Claim 4, since a 3rd transmission means can be implement | achieved with the pulley with a one-way clutch, it can reduce in size.

  According to the fifth aspect of the present invention, the winding force can be appropriately maintained in accordance with the variation in the winding diameter of the roll paper with a simple configuration.

It is a right view which shows the basic composition of the roll paper feeding apparatus which concerns on one embodiment of this invention. It is a left view of the same device. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is a principle explanatory view of a roll paper feeding device. It is a figure which shows the structure of the conventional roll paper feeding apparatus.

2 Forward / reverse motors 3, 7, 8 First transmission means
3,7 Toothed pulley
8 Timing belt 11 (9, 10) Conveying roller
9 Driving roller
10 Pressing roller 12 Reel drive shaft 8, 19 Second transmission means,
8 Timing belt
19 Roller 4, 14, 15 Third transmission means
4 Pulley with one-way clutch
14 pulley
15 Round belt 15 Tension adjusting means
15 Round belt (slidable belt)
16 reels 18 roll paper

Next, embodiments of the present invention will be described with reference to the drawings.
1 and 2, reference numeral 1 denotes a frame of the roll paper feeding device, and 2 denotes a motor attached to the frame 1, which can be rotated forward and backward by control from a control unit (not shown). . A toothed pulley 3 and a pulley 4 with a one-way clutch (4 ′) are fixed to the rotating shaft of the motor 2.

  In the figure, reference numeral 5 designates a support shaft that passes through the frame 1 and is rotatably supported via a bearing 6. The support shaft 5 has a frame 1 on the same side as the toothed pulley 3 of the motor 2. A toothed pulley 7 similar to the toothed pulley 3 is fixed. A toothed belt, that is, a timing belt 8 is wound between the toothed pulley 3 of the motor 2 and the toothed pulley 7 of the support shaft 5. The outer peripheral surface of the timing belt 8 is smooth.

  A driving roller 9 is fixed to a portion of the spindle 5 opposite to the toothed pulley 3 of the motor 2 with respect to the frame 1. The driving roller 9 is rotatably supported by the support shaft 10 ′ and holds the roll paper described later together with the pressing roller 10 that is elastically pressed so as to contact a part of the peripheral surface of the driving roller 9. Thus, a conveying roller 11 for feeding or winding is configured.

  In the illustrated example, two pairs of upper and lower transport rollers 11 are provided on the frame 1, but the transport rollers 11 may be only one pair or three or more pairs.

  The frame 1 supports another support shaft 12 that passes through the frame 1 between the motor 2 and the conveying roller 11 via a bearing 13 so as to be rotatable. A pulley 14 is fixed to a portion on the same side as the pulley 4 with a direction clutch, and a belt that can slide, for example, a round belt 15 is wound between the pulleys 4 and 14.

  Further, a reel holder 12 ′ is provided on the opposite side of the spindle 12 from the pulley 14 with respect to the frame 1, so that the reel 16 can be detachably attached to the reel holder and can be fixed by the stopper member 17. It is configured. The reel 16 winds and holds the roll paper 18 so that it can be fed out. As described above, the roll paper 18 is a paper tape, a long recording paper, a stamp binding, or the like.

  When this roll paper feeding device is used, the roll paper 18 drawn from the reel 16 is sandwiched between the transport rollers 11 (between 9 and 10).

  The support shaft 12 is provided with a roller (disk) 19 having a diameter larger than that of the pulley 14 at a position close to the pulley 14 or integrally with the pulley 14. As shown in FIG. 1, a part of the peripheral surface of the roller 19 is slidably contacted with a part of the outer peripheral surface of the timing belt 8 with an appropriate frictional resistance. The contact position is such that when the motor 2 rotates forward (counterclockwise in FIG. 1), that is, when the roller 19 rotates in the direction to feed out the roll paper 18 being sandwiched, the roller 19 rotates backward. It is a position to be rotated (clockwise in FIG. 1).

  The pulley 4 with the one-way clutch does not transmit the rotational force of the motor 2 to the round belt 15 (the clutch is free) when the motor 2 rotates forward, that is, when the transport roller 11 feeds the roll paper 18. When the motor 2 rotates in reverse, that is, when the transport roller 11 pulls back the roll paper 18, the rotational force is transmitted to the round belt 15 (the clutch is effective).

  Reference numeral 20 in FIG. 2 denotes a roll paper sensor made up of, for example, a transmissive optical sensor, which detects the presence of the roll paper by blocking light and inputs a detection signal to the control unit. The control unit can start normal rotation of the motor 2 based on the detection signal, and can measure the roll paper feeding distance from the number of pulses applied to the motor. Further, when the motor 2 rotates in the reverse direction, when the roll paper sensor 20 detects the leading edge of the roll paper, the motor 2 is controlled to stop the leading edge of the roll paper immediately before the first transport roller 11. Yes.

Next, the operation of the above configuration will be described.
After the leading end of the roll paper 18 is held between the first transport rollers 11, when the operator operates to input a feeding command to the control unit, the control unit gives a step pulse for forward rotation to the motor 2 to start forward rotation. A predetermined number of forward rotation step pulses are output to the motor 2 from the time when the leading edge detection signal is input from the roll paper sensor 20, and the roll paper is fed out for a predetermined length. For example, the roll paper is fed out until the leading edge of the roll paper reaches a predetermined distance from the cutting position of a roll paper cutter (not shown), for example, a position corresponding to the length of a specified number of stamps. When the motor reaches a predetermined value, the forward rotation of the motor is stopped.

  During the forward rotation of the motor 2, the one-way clutch 4 ′ does not transmit the rotational force of the motor 2 to the round belt 15, but the roller 19 is in contact with the surface of the timing belt 8. A rotational force in the direction opposite to the roll paper feeding direction is applied to the reel 16. Therefore, back tension is applied to the roll paper between the transport roller 11 and the reel 16, and the roll paper is prevented from being slackened. Since the frictional force between the roller 19 and the surface of the timing belt 5 is smaller than the roll paper feeding force by the conveying roller 11, the roller 19 to which the feeding force is applied from the conveying roller 11 via the roll paper is the timing belt. Since the sliding motion is performed on the surface 5, the roll paper is fed out in a state where an appropriate back tension is applied.

  The controller stops the forward rotation of the motor when the feed amount reaches a predetermined value, and simultaneously gives a cutting command signal to the roll paper cutter to cut the roll paper to a predetermined length. The cut roll paper of a predetermined length is put out to a receiving port or the like that opens on the customer service surface of the apparatus main body.

After the roll paper has been cut for a predetermined length, the control unit gives a reverse rotation step pulse to the motor, so that the reversely rotated transport roller 11 pulls back the remaining roll paper that has been cut for a predetermined length. Directional conveying force is applied.
On the other hand, the reverse rotational force of the motor 2 is also applied as a rotational force in the rewinding direction to the reel 16 via the pulley 4 with one-way clutch and the round belt 15. The output of the reverse rotation command signal (reverse rotation step pulse) from the control unit to the motor is continued until the roll paper cutting position pulled back by the transport roller 11 passes the detection position of the roll paper sensor 20.

  In the meantime, since the reverse rotational force of the motor 2 is positively applied to the reel 16 in the same manner as the conveying roller 11, the roll paper to be rewound is not slackened.

  However, the reverse rotational force of the motor 2 is transmitted to the transport roller 11 through the pulley 3, the timing belt 8 and the pulley 7, and is transmitted to the reel 16 through the pulley 4, the round belt 15 and the pulley 14. Therefore, the reverse rotation peripheral speed of the transport roller 11 and the reverse rotation peripheral speed of the reel 16 are always constant. On the other hand, the reverse rotation peripheral speed of the roll paper gradually decreases according to the remaining amount of roll paper accompanying the feeding. In other words, since the winding diameter is large at the beginning of the roll paper supply, the winding amount by the reel 16 that is reversed is larger than the pulling amount by the transport roller 11 that is reversed at the time of winding after feeding. There is a possibility that excessive tension (back tension) is applied to the roll paper between the transport roller 11 and the reel 16.

  In order to avoid undesirably excessive tension (back tension) due to a change in the winding diameter of the reel, a round belt 15 is used as means for transmitting a reverse rotational force from the motor 2 to the reel 16, and the roll paper to be rewound is used. When a certain tension or more is applied, the round belt can be slid with respect to the pulleys 4 and 14. Thereby, even if the roll paper winding diameter of the reel is different, it is possible to always apply a constant tension to the roll paper to be rewound.

  In the illustrated example, the pulley 4 with a one-way clutch is provided on the rotating shaft of the motor 2 and a normal pulley is provided on the reel drive shaft, and a round belt 15 is wound between the pulleys. The same effect can be obtained also when the ordinary belt is provided on the drive shaft and the rotary shaft of the motor 2 is provided, and the round belt 15 is wound between them.

  The roll paper feeding device according to the present invention is used for automatically feeding a predetermined amount of roll paper in devices using roll paper such as printers, facsimiles, stamp vending machines, ticket vending machines, ATMs, POS terminals and the like. Can do.

Claims (5)

The leading edge of the roll paper wound around the reel supported by the reel drive shaft is sandwiched by the conveyance roller, and the conveyance roller is rotated forward by one motor capable of rotating in the forward and reverse directions to feed out the roll paper. In a roll paper feeding device that winds the remaining part of the roll paper fed out by rotating the transport roller in the reverse direction after a part of the rolled paper is cut,
First transmission means for transmitting a rotational force in the feeding direction to the transport roller during forward rotation of the motor, and transmitting a rotational force in the pull-back direction to the transport roller during reverse rotation of the motor;
Second transmission means for transmitting to the reel drive shaft a rotational force in the winding direction that is weaker than a rotational force in the feeding direction of the transport roller during the forward rotation of the motor;
Third transmission means for transmitting a rotational force in the winding direction to the reel drive shaft when the motor rotates in the reverse direction and not transmitting a rotational force to the reel drive shaft during the reverse rotation of the motor;
The third transmission for adjusting a deviation associated with a change in the winding diameter of the roll paper between the peripheral speed of the transport roller and the peripheral speed of the roll paper on the reel drive shaft when the motor rotates in reverse. Tension adjusting means added to the means;
A roll paper feeding device comprising:   The first transmission means includes a toothed pulley fixed to the rotating shaft of the motor, a toothed pulley fixed to the rotating shaft of the conveying roller, and a timing belt wound between the pulleys. The roll paper feeding device according to claim 1.   3. The roll paper feeding device according to claim 1, wherein the second transmission means is configured such that a roller fixed to the reel drive shaft is brought into contact with the surface of the timing belt with an appropriate frictional resistance.   The third transmission means is provided on the rotating shaft of the motor or on the reel drive shaft, and the pulley with one-way clutch that the clutch is ineffective when the motor is rotating forward and the clutch is effective when the motor rotates in reverse. 3. A roll paper feeding device according to claim 1 or 2, comprising a pulley provided on the reel drive shaft or the rotating shaft of the motor, and a transmission belt wound between the pulleys. .   The tension adjusting means is configured by using a slipperable belt as a transmission belt wound between a pulley with a one-way clutch and a pulley provided on a reel drive shaft or a motor rotation shaft. The roll paper feeding device according to claim 1 or 4.

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