JPH1143244A - Paper sheet winder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a paper sheet winder which can prevent the occurrence of looseness of a paper sheet by eliminating a delay at rotation rising time. SOLUTION: When a cylindrical winding shaft 32 which is connected to a driving transmitting system 27 and winds a long size paper sheet is rotatably arranged independently of a winding dislocation preventive member 38 to prevent shaft directional winding dislocation of a paper sheet wound round this winding shaft 32, since only the comparatively small diameter winding shaft 32 independently rotates even at rotation rising time, rotation rises in a low inertia condition, and the rotational rising does not delay. Therefore, the paper sheet can be wound without loosening it from a start of winding, and a malfunction such as impact force is applied to a paper sheet feeding mechanism by looseness, can be avoided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper winding device used for sequentially winding printed journal paper in a journal printer, for example, or for sequentially winding backing paper in a label printer.

[0002]

2. Description of the Related Art An example of a conventional journal printer using a thermal head will be described with reference to FIGS.
The journal printer 1 is used in an electronic cash register, for example, in parallel with a receipt printer 2, and has a printing portion in which a line-type thermal head 3 and a platen roller 4 are freely contacted and separated and pressed. And are arranged to face each other. Then, the thermal head 3 is driven while the journal paper 5 made of the roll paper pulled out from the roll body passes between the thermal head 3 and the platen roller 4 of the printing unit through the pair of guide plates 6 and is conveyed by the platen roller 4. Printing is performed. The printed journal paper 5 is sequentially wound by a paper winding device 8 via a guide plate 7.

[0003] As shown in FIG.
A main reel 10 having a cylindrical take-up shaft 9;
A take-up reel 13 which has a fitting portion (not shown) which is detachably fitted in the axial direction with respect to the main reel 10 and which is combined with the sub-reel 12 having the same size as the main reel 10. I have. The take-up shaft 9 is a portion for taking up the journal paper 5, and a take-up gear 15 is integrally mounted on the shaft 14 outside the main reel 10. Both ends of the shaft 14 are rotatably and detachably supported by shaft support portions 18 formed in notches in the device side plates 16 and 17.

On the other hand, a platen gear 21 for the platen roller 4 is connected to a motor gear 19 attached to a rotary drive shaft of the motor via an idle gear 20, thereby forming a printing section transport drive system 22. On the other hand, the idle gear 20, the pulley gear 23, the transmission belt 24,
The take-up gear 15 is connected via a pulley gear 25 and a gear 26 to form a drive transmission system 27 for take-up.

With this configuration, the driving force is transmitted to the take-up gear 15 by the drive transmission system 27 in parallel with the printing operation, and the take-up reel 13 is driven to rotate. , 12 is wound up on the winding shaft 9 in an orderly manner while preventing a winding deviation. The journal paper 5 wound on the winding shaft 9 can be
By removing the take-up reel 13 from the side plates 16 and 17 and removing the sub-reel 12 from the main reel 10 in the axial direction, the take-up reel 9 is removed from the free end.

[0006]

In order to increase the printing speed in this type of printer, it is necessary to increase the speed of the printing mechanism and to follow the paper take-up device 8.
Since the paper winding device 8 is normally driven by a transmission belt 24 such as a rubber belt or a timing belt, when the printer is started from a stopped state, the rotation rising of the paper winding device 8 is printed by expansion and contraction of the transmission belt 24. This is delayed compared to the paper feed on the copy side. Due to such a delay in the rise, the journal paper 5 is slackened.
Since the paper is wound up rapidly by the paper winding device 8, an impact is given to the paper feeding mechanism on the printing unit side. Due to this impact force, paper slip occurs in the paper feeding mechanism on the printing unit side, and the thermal head 3 is fed in this state, resulting in a printing result in which the line feed pitch is shifted.

[0007] Such a phenomenon is likely to occur at the beginning of winding of the journal paper 5. This is because, since the driving torque of the paper winding device 8 is constant, the smaller the winding diameter, the larger the impact force that generates a larger winding load. By the way, as the winding diameter increases, the speed of winding the sheet increases, so that the sheet does not loosen and no impact force is generated.

In this regard, in the conventional paper winding device 8, the journal paper 5 is wound by the rotation of the reels 10 and 12 together with the winding shaft 9, so that the inertia is large and the delay at the time of rotation rising is large. This is likely to cause the above problem.

In the case of the conventional take-up reel 13,
At the time of paper replacement (paper removal), one of the auxiliary reels 12 must be removed, and the paper replacement work is troublesome.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a paper winding device capable of preventing the occurrence of paper slack by eliminating a delay at the time of rotation start.

In addition, another object of the present invention is to provide a paper winding device capable of facilitating a paper exchange operation.

[0012]

According to the first aspect of the present invention,
The cylindrical take-up shaft that is connected to the drive transmission system and takes up long paper is rotatable independently of the winding deviation preventing member that prevents the paper from winding around the winding shaft in the axial direction. Provided. Therefore, since only a relatively small diameter take-up shaft rotates independently of the winding deviation prevention member to take up the sheet, even when the rotation rises, the rise is in a state of low inertia, and the rotation rises. There is no delay. Therefore, the sheet can be wound without slack from the beginning of winding, and there is no problem such as giving an impact force to the sheet feeding mechanism due to the slack.

According to a second aspect of the present invention, in addition to the sheet winding device of the first aspect, the winding shaft rotates as an unwinding preventing member only at the end opposite to the sheet removing direction. It has a free reel body. Therefore, since the reel body as a winding deviation prevention member for winding the paper orderly is provided only at one end of the winding shaft, the free end which does not have the reel body when replacing the paper after the winding is provided. The paper can be removed from the side as it is, and the paper replacement work becomes easy. In this case, the reel body is rotatable relative to the winding shaft, and does not rotate with the winding shaft. Therefore, the inertia at the time of rotation rising does not increase. Further, in order to wind up the sheet on the side having no reel body, the apparatus side plate or the like may be used.

[0014]

FIG. 1 shows a first embodiment of the present invention.
A description will be given based on FIG. The paper take-up device 31 of the present embodiment is used, for example, for taking up journal paper in a journal printer 1 using a thermal head 3 as shown in FIGS. 5 and 6. The same parts as those shown are denoted by the same reference numerals.

In the paper winding device 31 of this embodiment, first, a winding shaft 32 having a length corresponding to the width of the journal paper 5 is provided. The winding shaft 32 is made of a hollow cylindrical resin having a certain diameter, and a locking portion 33 for inserting and locking the leading end of the winding of the journal paper 5 is formed on a part of the outer periphery thereof. Therefore, the winding shaft 32
In this case, the direction indicated by arrow A is the paper removal direction.
Further, a take-up drive gear 34 that meshes with the gear 26 is integrally provided at one end of the take-up shaft 32 in the sheet removing direction. The gear 34 is smaller than the outer diameter of the winding shaft 32. Further, the winding shaft 32 and the gear 3
4, a bearing 35 having a diameter slightly smaller than the outer diameter of the gear 34 is formed. Further, the winding shaft 3
A thin shaft 36 slightly longer than the winding shaft 32
Is pierced. The thin shaft 36 is made of metal with a step, and one end protruding toward the gear 34 is fixed by an E-ring 37.

On the other hand, at the other end of the thin shaft 36 protruding from the winding shaft 32 at the end opposite to the sheet removing direction A, a reel body 38 as a winding deviation preventing member is prevented from coming off. It is relatively rotatably mounted. The reel body 38 has a disk shape large enough to cover the maximum winding diameter of the journal paper 5, and has a central portion provided with a connecting portion 3 for rotatably connecting to the other end of the fine shaft 36.
9 are formed. This connecting portion 39 is similar to that shown in FIGS.
As shown in an enlarged view, a boss 40 having a hollow cylindrical shape and a large-diameter tip end so that the thin shaft 36 passes therethrough,
And a retaining ring fixing groove 41 formed by notching a part of the small diameter portion formed between the leading end of the reel member and the reel body so that the internal hollow portion is exposed. The fine shaft 3
An annular groove 42 is formed at a position corresponding to the retaining ring fixing groove 41 of No. 6. Further, a retaining ring 43 made of an elastic wire is provided to be inserted into the retaining ring fixing groove 41 so as to enter the groove 42. Here, the width dimension d of the retaining ring 43 is, as shown in FIG.
Is smaller than the outer diameter of the groove 42 and is larger than the outer diameter of the groove 42.
6) It functions to rotate independently while retaining.

An apparatus side plate 1 for transmitting a rotational driving force.
6, a shaft support portion 44 for detachably inserting and supporting the bearing portion 35 from above is formed in a notch. Similarly, one end of the thin shaft 36 is detachably mounted on the device side plate 17 from above. A shaft support portion 45 for insertion and support is formed with a notch. Since the shaft support portions 44 and 45 are cut out from above in a slightly downward direction toward the print head, the rotational driving force can be reliably transmitted to the take-up shaft 32 in a paper take-up character. . Here, on the device side plate 16 side, the device side plate 16 itself is formed relatively large as the auxiliary reel portion 46, and the reel function on the gear 34 side is secured. On the inner surface side of the sub reel portion 46, a rib 47 is formed so as to reduce resistance so that the journal paper 5 to be wound is not in surface contact. The rib 47 is provided on the side of the reel body 38 where the paper is transported. The space between the reel body 38 and the rib 47 is set to the width of the journal paper 5.

In such a configuration, the journal paper 5 is set in a state in which the journal paper 5 can be wound by being wound on the winding shaft 32 while being held by the locking portion 33. Thereafter, the thermal head 3 is executed as needed.
Gear 2 by the drive transmission system 27 in parallel with the printing operation on the
The driving force is transmitted to the gear 34 via the gear 6. At this time,
Since the winding shaft 32 integrally having the gear 34 is supported so as to rotate independently of the reel body 38 and the like, only the winding shaft 32 (small shaft 36) rotates with the gear 34 in the winding direction. The reel body 38 and the like do not rotate. That is,
Since the journal paper 5 is wound by rotating only the relatively small diameter winding shaft 32 independently, even when the rotation rises, the rise is in a state of low inertia, and the rotation rise may be delayed. Absent. Therefore, the journal paper 5 can be wound without slack from the beginning of the winding, and the slack causes an impact force on the paper feeding mechanism on the printing unit side to cause inconvenience such as a shift in line feed pitch. Absent. At the stage where the winding diameter has increased as the winding progresses, the speed of winding the journal paper 5 increases,
As usual, no looseness of the journal paper 5 occurs and no impact force is generated. Further, in the winding operation of the journal paper 5, since the journal paper 5 is guided by the reel body 38 and the auxiliary reel portion 46, it can be wound up neatly without causing a winding displacement to the end. Further, in a state in which the reel 34 is removed from the apparatus side plates 16 and 17, there is no reel body on the gear 34 side of the winding shaft 32 and the free end in the paper removing direction A remains as it is (one-sided reel structure). The work of extracting the journal paper 5 from the winding shaft 32 can be easily performed, and the paper exchange is simplified.

Next, a second embodiment of the present invention will be described with reference to FIG. The same parts as those described in the above embodiment are denoted by the same reference numerals, and description thereof will be omitted. In the present embodiment, the device side plate 17 is replaced with the reel body 38.
The reel itself is formed relatively large as the main reel portion 48, and a reel function as a winding deviation preventing member is secured. On the inner surface side of the main reel portion 48, a rib 49 for reducing resistance so that the journal paper 5 to be wound does not come into surface contact.
Are formed to protrude. The space between these ribs 47 and 49 is set to the width of the journal paper 5. In addition, thin shaft 3
6 has an E-ring 50 with respect to the end of the winding shaft 32.
Has been prevented by.

Even with such a configuration, as in the case of the above-described embodiment, only the winding shaft 32 is independently driven to rotate. There is no delay in the rise of rotation. Further, a separate reel body for winding up the journal paper 5 in an orderly manner is not required, and the apparatus side plates 17 and 1 are not required.
Since a part of 8 is used, the configuration is inexpensive.

In these embodiments, the single-sided reel structure and the non-reeled structure have been described as examples of the winding deviation preventing member. However, both ends of the winding shaft 32 having relatively rotatable reel bodies are provided. Take-up shaft 32 with reel structure
Only one of them may rotate independently. in this case,
It is preferable that the reel body located in the sheet removing direction is detachable in the axial direction.

[0022]

According to the first aspect of the present invention, the cylindrical take-up shaft that is connected to the drive transmission system and takes up a long sheet of paper is wound around the take-up shaft in the axial direction. Since it is rotatably provided independently of the winding deviation preventing member for preventing winding deviation, it rises in a state of low inertia even at the time of rotation rising, and there is no delay in the rotation rising, so that the winding starts. The paper can be wound up without causing slack, and inconvenience such as giving an impact force to the paper feeding mechanism due to the slack can be avoided.

According to the second aspect of the present invention, in addition to the sheet winding device of the first aspect, the winding shaft is used as a winding deviation preventing member only at an end opposite to the sheet removing direction. In addition to the advantageous effects of the first aspect, the present invention has the advantage that the paper can be removed from the free end side without the reel when the paper is exchanged after winding, thereby facilitating the paper exchange work. It can be.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a paper winding device according to a first embodiment of the present invention.

FIG. 2 is an enlarged side view showing a part of a reel body.

FIG. 3 is a sectional view taken along line BB in FIG. 2;

FIG. 4 is an exploded perspective view of a paper winding device according to a second embodiment of the present invention.

FIG. 5 is a schematic perspective view showing a receipt / journal printer.

FIG. 6 is a schematic side view showing a configuration of a journal paper transport system.

FIG. 7 is an exploded perspective view of a paper winding device showing a conventional example.

[Explanation of symbols]

 5 Paper 27 Drive transmission system 32 Winding shaft 38 Reel body (winding prevention member) 48 Winding prevention member A Paper removal direction

Claims (2)

[Claims] An anti-winding member for preventing an axial deviation of the paper wound around a cylindrical winding shaft, which is connected to a drive transmission system and winds a long paper, around the winding shaft. A winding device, which is provided independently and rotatably. 2. The paper take-up device according to claim 1, wherein the take-up shaft has a reel body rotatably rotatable only at an end opposite to the sheet take-out direction as a winding deviation prevention member. apparatus.