JPH0229081Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Summary] This is a continuous paper winding mechanism, and a shoe clutch lever that connects and disconnects the shoe clutch of the winding shaft.
By providing it at a position where it abuts and engages with the tension bar, the movement of the tension bar can be reliably transmitted to the shoe clutch with a simple structure.

[Industrial application field]

The present invention relates to a winding mechanism for continuous paper, and more specifically, to a mechanism for rotating a winding shaft in accordance with the slackness of the continuous paper in various devices that use continuous paper, such as receipt issuing machines. .

When printing on continuous paper as a receipt copy and journal issued by a receipt issuing machine, the number of printed lines is indefinite and intermittent, so in order to wind the continuous paper with a constant winding force,
It is necessary to operate a shoe clutch provided in a system for driving the winding shaft of the continuous paper depending on the slack state of the continuous paper.

[Conventional technology]

Conventionally, a structure using a cam as shown in Fig. 3 has been used to operate the shoe clutch installed in the system that drives the winding shaft of continuous paper in a receipt issuing machine according to the slackness of the continuous paper. was. In Fig. 3, 1 is a receipt conveyance path;
2 is the journal conveyance path, and 3 is the receipt conveyance path 1.
4 is a journal, 5 is a sprocket wheel for feeding and driving the journal 4 in the journal transport path 2, 6 is a winding shaft of the journal 4,
7 is a motor shaft of a motor that drives the winding shaft 6;
8 is a shoe clutch provided in the drive system extending from the motor shaft 7 to the winding shaft 6. The fixed parts such as the mounting plate 9 provided inside the housing of the receipt issuing machine include:
A tension bar 10 is rotatably mounted around a shaft 11. A bar 12 is provided at the end of the tension bar 10 to contact the journal 4 in the journal conveyance path 2. The tension bar 10 is biased by a tension type spring 13 in the counterclockwise direction in the figure, that is, in the direction in which the journal 4 is loosened.

A shoe clutch lever 14 is also attached to the mounting plate 9 so as to be rotatable about a shaft 15. A cam 16 that rotates coaxially with the tension bar 10 is attached to one end of the brake clutch lever 14.
is in contact engagement with the brake clutch lever 14.
The other end is engaged with the above-mentioned shoe clutch 8. The shoe clutch lever 14 is biased clockwise in the drawing, that is, in the direction in which the shoe clutch 8 is engaged, by a tension spring 17.

The logical shape of the cam 16 is such that when the journal 4 in the journal conveyance path 2 is tensioned, the tension bar 10 is rotated clockwise against the biasing force of the spring 13, so that the cam 16 is rotated. Shaped to push the shoe clutch lever 14 counterclockwise and to allow the spring 17 to rotate the shoe clutch lever 14 clockwise when the journal 4 in the journal conveyance path 2 is in a slack state. It is becoming.

In the conventional technology, the continuous paper winding mechanism is constructed in this way, so that when the journal 4 is tensioned, the shoe clutch 8 is engaged, and the winding shaft 6 rotates, so that the journal 4 is wound up. , when the journal 4 is slack, the shoe clutch 8 is broken and the winding of the journal 4 is stopped.
Depending on the slack state of the journal 4, the journal 4 can be wound around the winding shaft 6 with a constant winding force.

[Problem that the invention attempts to solve]

In this conventional system, the cam 16 is used to connect and disconnect the shoe clutch 8 by the movement of the tension bar 10 based on fluctuations in the slack state of the journal 4, which has the disadvantage of a complicated structure. Furthermore, since the movement of the tension bar 10 is converted into small fluctuations of the cam 16 and then transmitted to the rotational movement of the brake clutch lever 14, there is a drawback that the shape of the loop of the cam 16 requires high precision. .

The present invention was created in view of these points, and an object of the present invention is to provide a continuous paper winding mechanism capable of winding up a journal with a constant winding force using a simple structure.

[Means for solving problems]

FIG. 1 shows a front view of the principle of the continuous paper winding mechanism of the present invention.

In FIG. 1, 20 is continuous paper, 21 is a continuous paper conveyance path, 22 is a winding shaft for continuous paper 20, and 23
2 is a motor for rotationally driving the winding shaft 22; 24 is a shoe clutch provided in the drive system from the motor 23 to the winding shaft 22; 25 is rotatable and engages and engages the shoe clutch 24; 26 is a first biasing means that biases the shoe clutch lever 25 in the direction in which the shoe clutch 24 is inserted; 27 is a rotatable tension bar; and 28 is a continuous paper conveyance path 21 The end, 29, of the tension bar 27 that contacts the paper 20 connects the tension bar 27 to the continuous paper 20.
is a second biasing means that biases in the loosening direction, and 30 rotates the shake clutch lever 25 in the opposite direction to the biasing direction of the first biasing means 26 when the continuous paper 20 is tensioned. The structure in which the tension bar 27 comes into contact with the squeeze lever 25 so that the tension bar 27 moves, and the reference numeral 50 exemplifies a feeding mechanism that feeds out continuous paper.

[Effect]

When the continuous paper 20 is tensioned, the shake clutch lever 25 is pushed by the tension bar 27 and rotates in the opposite direction to the biasing direction of the first biasing means 26, so that the shake clutch 24 is in a disengaged state. Further, when the continuous paper 20 is in a relaxed state after the paper is fed out by the feeding mechanism, the tension bar 27 is rotated by the second biasing means 29, so that the tension bar 27 is rotated by the tension bar 27. The pressed state is released. The shoe clutch lever 25 is pivoted by the first biasing means 26, so that the shoe clutch 24 is engaged. In this way, the continuous paper 20
The continuous paper is wound around the winding shaft 23 with a constant winding force by connecting and breaking the shrew clutch according to the slack state of the paper. Moreover, tension bar 2
7 and the brake clutch lever 25 for rotational movement, the structure is simplified without using any complex-shaped cams, and the rotation of the tension bar 27 is transmitted to the brake clutch 24. is certain.

〔Example〕

FIG. 2 is a front view showing an embodiment of the present invention, which is applied to a mechanism for winding up a journal as continuous paper in a receipt issuing machine.

The substantially dogleg-shaped tension bar 27 and the brake clutch lever 25 are independently rotatable about a shaft 31. Reference numeral 32 indicates a tension type spring as a first biasing means, and reference numeral 33 indicates a tension type spring as a second biasing means. One end of a first biasing means 32 is attached to the brake clutch lever 25, and the first biasing means 32 biases the brake clutch lever 25 to rotate counterclockwise around the shaft 31, thereby engaging the brake clutch 24. The journal 4 sent by the sprocket wheel 5 in the journal conveyance path 2 is moved by the tension bar 27.
While pressing down on the drawing, move along the bar 12 provided at the end of the tension bar 27, and connect the motor 23.
It is wound up on a winding shaft 22 provided on the same axis as . Note that the journal conveyance path 2 includes a guide roller 51 whose rotating shaft is fixed to a frame (not shown), etc.
The rotation of the tension bar 27 restricts movement in the left and right directions in the drawing. There is no particular guide mechanism such as a guide plate between the lever 27 and the roller 51.

In this embodiment, the structure in which the tension bar 27 comes into contact with the brake clutch lever 25 is as follows:
The structure includes a protrusion 34 implanted in the tension bar 27 and a window 35 bored in the brake clutch lever 25 at a position surrounding the protrusion 34. When the journal 4 is tensioned in the journal conveyance path 2, the tension bar rotates clockwise and the projection 34 engages the shoe clutch lever 25.
The inner edge of the window 35 contacts the inner edge of the window 35. This contact pushes the shoe clutch lever 25 clockwise, so
The shoe clutch 24 is disengaged, and the winding of the journal 4 by the winding shaft 22 is temporarily stopped.

In this state, the wheel 5 is rotated by the changeover operation of the journal 4 printed by the printing mechanism 3, and the journal 4 is sent out. This feeding loosens the journal 4. When the journal 4 is relaxed, the tension bar 27 is rotated counterclockwise by the spring 33. Due to this rotation, the shoe clutch lever 25 is released from the pressing force of the tension bar 27, the shoe clutch 24 is engaged, and the journal 4 is wound up by the winding shaft 22. In this way, the journal 4 is always wound around the winding shaft 22 with a constant winding force. This continuous paper winding mechanism does not use any complicatedly shaped cams, and furthermore, the tension bar 27 and the squeeze lever 25 are supported by a common shaft 31, so the structure is simple. As a result, the number of parts can be reduced and the assembly work can be simplified.

Further, since the rotation of the tension bar 27 and the rotation of the brake clutch lever 25 are performed by the contact engagement between the protrusion 34 and the window 35, the structure can be simplified in this respect as well. By utilizing the allowance, the shoe clutch 24 can be reliably held in the engaged state even if the tension bar 27 swings within a certain range when the journal 4 is slack.

[Effect of idea]

As described above, according to the present invention, the movement of the tension bar can be transmitted to the joints of the shake clutch with a simple structure, so that continuous paper such as journals can be held firmly on the winding shaft with a constant winding force. It can be rolled up.

[Brief explanation of drawings]

FIG. 1 is a front view of the principle of the continuous paper winding mechanism of the present invention, FIG. 2 is a front view of an embodiment of the present invention, and FIG. 3 is a front view of a conventional system. In FIG. 1, 20 is a continuous paper sheet, 21 is a continuous paper transport path, 22 is a winding shaft, 24 is a shoe clutch, 25 is a shoe clutch lever, 26 is a first biasing means, 27 is a tension bar, and 28 is a continuous paper feed path. The end of the tension bar that contacts the paper, 29, is the second biasing means.

Claims (1)

[Claims for Utility Model Registration] A paper winding device having a feeding mechanism 50 that feeds continuous paper and a winding shaft 22 that winds up the fed paper, which transmits/cuts rotational driving force to the winding shaft 22. a tension lever 27 that is rotatably supported at one end, contacts the continuous paper 20 at the other end, and rotates in accordance with the amount of slack in the continuous paper between the take-up shaft 22 and the delivery mechanism 50; a clutch lever 25 that is rotatably supported by a rotating shaft and has a member that brings the clutch 24 into a state of transmitting/disconnecting rotational driving force by moving toward and away from the clutch 24; and biasing means 26 and 29 for biasing the continuous paper in the tensioning direction and for biasing the tension lever 27 in the direction in which the clutch 24 transmits the rotational driving force. A continuous paper roll characterized in that the clutch lever 25 is positioned at a position where the rotational driving force of the clutch 24 is cut off following rotation of the tension lever 27 by a predetermined tension amount. Removal mechanism.