JP4824786B2 - Tension roller mechanism - Google Patents

Abstract

The invention provides a tension roller mechanism. A coiling medium arranged at a rotary pivot is arranged on the tension roller mechanism of a transmission roller to transmit the coiling medium by mounting the tension roller on a rotatablely supported tension arm. When the coiling paper is arranged on the transmission roller, because the tension roller reelingly swings, the placing work is difficult to perform. The tension roller mechanism is characterized in that: a projection portion projecting further forwards than the position of the tension arm for mounting the tension roller is arranged; a rod is ratatably mounted on an opening door rotatably mounted on the main body of the device by a spring and configured that the end is arranged at the rotary trail of the projection portion and a bracket for activating the rod is mounted on the opening door and the rod is separated from the bracket when the opening door is at open state and the projection portion of the tension arm is fastened on the rod to lock the action of the tension arm.

Description

  The present invention relates to a tension roller mechanism that reduces a load applied to a roll-shaped medium when a roll-shaped medium such as roll paper is fed out.

  In general, the tension roller mechanism is configured as shown in FIG. In the figure, reference numeral 101 denotes a tension roller, which is attached to one end of the tension arm 102. The tension arm 102 is rotatably supported by a rotation fulcrum 104 and the other end is pulled in the direction of an arrow 109 by a tension spring 105.

  Reference numeral 103 denotes a conveyance roller, and reference numeral 106 denotes a rotation fulcrum of the roll paper 107. The roll paper 107 set on the rotation fulcrum 106 is set on the conveyance roller 103 through the medium conveyance route 108.

  The roll paper 107 set in this way is detected by a sensor (not shown), and is sequentially drawn out by the transport roller 103 rotated by an actuator (not shown).

  When a ticket issuing instruction is issued from a control unit (not shown), the transport roller 103 rotates and transports the roll paper 107 in the direction of the arrow 110 while feeding it out. At the time of this conveyance, the load is absorbed by the tension roller 102 so that a sudden load is not applied to the conveyance roller 103 due to the weight of the roll paper 107 (see, for example, Patent Document 1 and Patent Document 2).

Japanese Patent Application Laid-Open No. 7-251992 JP 2008-137805 A

  However, according to the above-described conventional technique, when the roll paper is set on the conveyance roller, the tension roller is moved steadily, so that the setting operation is difficult. Further, the roll paper set on the conveyance roller is pulled by the tension roller. However, there is a problem that it is removed from the set conveyance roller.

  An object of the present invention is to solve such a problem.

The present invention because of that, the attach the tension roller is rotatably supported tension arm, the medium drawn from the roll-shaped medium being set to the rotation fulcrum to be transported in the transport roller by way of the tension roller In the tension roller mechanism to be set, a protruding portion that protrudes forward from the portion where the tension roller of the tension arm is attached, a rotatable lever that is biased by a spring, and an opening door that is rotatably provided on the apparatus body , Provided with a bracket provided on the opening door, when the opening door is closed, the bracket rotates the lever against one end of the tension arm against the urging force of the spring, When the opening door is opened and the bracket is separated from the lever, the lever is biased by the spring. Contact with the tension arm to the projection of the one end to rotate said tension arm by is characterized in that it is locked.

  In the present invention as described above, when the opening door is opened at the time of setting the roll paper, the tension arm is locked, and the wobbling of the tension roller when the roll paper is set on the conveying roller can be suppressed.

  Further, since the tension arm (tension roller) is locked, there is an effect that the roll paper is not detached from the conveying roller during the setting.

Side explanatory view showing an embodiment Plane explanatory diagram of the opened state Plane explanatory drawing of the closed state Side explanatory diagram showing a conventional example

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is an explanatory side view showing the embodiment, FIG. 2 is an explanatory plan view of the door opened state, and FIG. 3 is an explanatory plan view of the door closed state.

  In the figure, reference numeral 1 denotes a tension roller, which is attached to a tension arm 2, and the tension arm 2 has a protruding portion 2 </ b> A that protrudes forward from a position where the tension roller 1 is attached. The tension arm 2 is rotatably supported by a rotation fulcrum 3, and the other end is pulled in the direction of an arrow 9 by a tension spring 5.

  Reference numeral 4 denotes a conveyance roller, and 6 denotes a rotation fulcrum of the roll paper 7. The roll paper 7 set on the rotation fulcrum 6 is set on the conveyance roller 4 through a medium conveyance route 8.

  The roll paper 7 set in this way is detected by a sensor (not shown), and is sequentially drawn out by a transport roller 4 rotated by an actuator (not shown).

  Therefore, when a ticket issuing instruction is issued from a control unit (not shown), the transport roller 4 rotates and transports the roll paper 7 in the direction of the arrow 10 while feeding it out. At the time of the conveyance, the tension roller 1 absorbs the load so that the load is not applied to the conveyance roller 4 due to the weight of the roll paper 7.

  Reference numeral 11 denotes a lever which is attached to a position where the protruding portion 2A of the tension arm 2 abuts via a rotation fulcrum 12 so as to rotate in a direction perpendicular to the tension arm 2.

Reference numeral 13 denotes a lever spring formed by a coil attached to the rotation fulcrum 12 of the lever 11 and urges the lever 11 in a direction opposite to the rotation. Reference numeral 14 denotes a fulcrum bracket to which the rotation fulcrum 12 is attached, and 15 denotes a rear bracket to which the fulcrum bracket 14 is attached. The one end the lever 11 of the lever spring 13, the other end is fixed to the rear bracket 15, the as lever 11 around a rotation fulcrum 12 by the action of a force which rotates in the direction of arrow 19. When the lever 11 is rotated by the lever spring 13, the rear bracket 15 interferes with the rear end portion 11 </ b> A of the lever 11, and the rotation operation is restricted by restricting the rotation.

  Reference numeral 17 denotes an open door, and a door bracket 18 is provided. The door bracket 18 and the rear bracket 15 are connected by a door rotation fulcrum 20, and the open door 17 can be operated in the range of the arrow 21.

  The operation of the above configuration will be described.

  When the roll paper 7 is set, as shown in FIG. 2, when the opening door 17 is opened, the lever spring 13 is pressed, and the front end portion 11B of the lever 11 jumps out on the rotation locus 16 of the tension arm 2 shown in FIG. The front end portion 11B of the lever 11 comes into contact with the tension arm 2, and the tension roller 1 attached to the tension arm 2 is locked. The lock of the tension roller 1 eliminates the influence of the tension spring 5 on the roll paper 7 so that the locked state is maintained, and the setting operation is performed in a stable state in which the entire feeding mechanism from the roll paper 7 to the transport roller 4 is fixed. It can be performed.

  Next, when the roll paper 7 is fed out, as shown in FIG. 3, when the open door 17 is closed, the rear end portion 11 </ b> A of the lever 11 is pushed in by the door bracket 18, whereby the front end of the lever 11 is moved. The part 11B moves away from the projecting part 2A of the tension arm 2 and retreats from the rotation locus 16 of the tension arm 2, so that the tension arm 2 is freely rotated and the roll paper can be conveyed.

  According to the present embodiment described above, when the roll door is set, when the opening door is opened, the tension arm is locked, and the wobbling of the tension roller when the roll paper is set on the transport roller can be suppressed.

  Further, since the tension arm (tension roller) is locked, the roll paper is not detached from the conveying roller during the setting.

DESCRIPTION OF SYMBOLS 1 Tension roller 2 Tension arm 2A Protrusion part 3 Rotation fulcrum 4 Conveyance roller 5 Tension spring 6 Rotation fulcrum 7 Roll paper 8 Medium conveyance route 9 Arrow 10 Arrow 11 Lever 11A Rear end part 11B Front end part 12 Rotation fulcrum 13 Lever spring 14 Support point bracket 15 Rear bracket 16 Rotation locus 17 Open door 18 Door bracket 19 Arrow 20 Door rotation fulcrum 21 Arrow

Claims (1)

Install the tension roller is rotatably supported tension arm, the tension roller mechanism is set to be transported to the transport roller by the medium drawn from the roll-shaped medium being set to the rotation fulcrum to via said tension roller,
A projecting portion projecting other party from locations fitted with tension roller of the tension arm,
A rotatable lever biased by a spring;
An opening door that is rotatably provided in the apparatus body ;
Comprising a bracket provided on the opening door,
When the opening door is closed, the bracket rotates against the biasing force of the spring so that one end of the lever moves away from the protruding portion of the tension arm,
When the bracket is opened the opening door away from the lever, the lever is rotated by the urging force of the spring, tension arm end of the lever to abut on the protruding portion of the tension arm is locked A tension roller mechanism characterized by that.

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