JP5411182B2 - Roll holding unit for printer - Google Patents

Description

  Embodiments described herein relate generally to a printer roll holding unit.

  2. Description of the Related Art Conventionally, there has been known a roll holding unit that applies an urging force to a side surface of a paper roll by an urging member provided at one axial end portion of a paper roll for a printer.

  In this type of roll holding unit, it is desired to hold the paper roll more reliably.

  Therefore, an object of the embodiment of the present invention is to obtain a roll holding unit that can hold a roll of paper or the like more reliably.

A printer roll holding unit according to an embodiment of the present invention includes a regulation wall portion, a movable arm, and a lock arm. The restriction wall portion is provided opposite to the axial end portion of the roll on at least one side in the axial direction of the roll, and restricts the movement of the roll in the axial direction. The movable arm includes a shaft support portion that enters the shaft tube to support the roll, and an elastic member that supports the shaft support portion and biases the shaft support portion in the insertion direction of the shaft tube. shaft supporting at provided side of the regulation wall portion of Ru adjacent position and axial support to enter the shaft tube is provided movably between a separated position exiting the shaft outside the tube. The lock arm is provided to be movable between a restriction position that restricts the movable arm from moving from the proximity position to the separation position and a release position that allows the movable arm to move from the proximity position to the separation position. The movable arm is moved from the proximity position to the separation position by being pushed by the roll moved toward the mounting position along the radial direction of the roll, and then moved from the separation position to the proximity position by the biasing force of the elastic member. Thus, the shaft support portion enters the shaft tube .

FIG. 1 is a perspective view of a printer roll holding unit according to an embodiment of the present invention, showing a state in which a cover is opened. FIG. 2 is a perspective view showing a roll holding mechanism provided in the printer roll holding unit according to the embodiment of the present invention. FIG. 3 is a front view showing the roll, the regulating wall portion, and the movable arm in a state where the roll is moving toward the set position in the printer roll holding unit according to the embodiment of the present invention. FIG. 4 is a front view showing the regulating wall portion, the movable arm, and the lock arm in a state where the roll is set at the set position in the printer roll holding unit according to the embodiment of the present invention. FIG. 5 is a side view of the printer roll holding unit according to the embodiment of the present invention with the cover opened. FIG. 6 is a side view of the printer roll holding unit according to the embodiment of the present invention with the cover closed.

  Hereinafter, a printer roll holding unit according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

  A printer roll holding unit 1 (hereinafter also simply referred to as a unit 1) according to the present embodiment is installed in a printer. The unit 1 holds a roll 3 of continuous belt 2 in a detachable and rotatable manner. The printer prints on the continuous paper 2 drawn from the roll 3 of the unit 1.

  The unit 1 includes, as a housing 4, a base 4A in which a recess 4a that accommodates a component is formed, and a cover 4B in which a recess 4b that covers the component is formed. The base 4A and the cover 4B are rotatably connected around the hinge axis Ah by a hinge mechanism (not shown). Cover 4B covers base 4A so that opening and closing is possible.

  From the inner surface of the cover 4B, a plurality (five in the present embodiment) of ribs 4c having an arc-shaped cutout and perpendicular to the hinge axis Ah protrude in parallel with each other. And the vertical wall part 4d parallel to the hinge axis | shaft Ah is connecting the edge part on the opposite side to the hinge axis | shaft Ah of the some rib 4c. In the present embodiment, the plurality of ribs 4c and the vertical wall portion 4d enhance the rigidity of the cover 4B. The arc-shaped notch forms a clearance between the rib 4c and the roll 3 set on the base 4A and the regulating wall 6 with the cover 4B closed (see FIG. 6). A thermal head 10 is provided on the cover 4B.

  The base 4A is provided with a roll holding mechanism 9 including a base portion 5, a regulating wall portion 6, a movable arm 7, a lock arm 8, and the like. As shown in FIG. 1, on the base part 5, regulating wall parts 6 that are parallel to each other with a gap project. The roll holding mechanism 9 holds the roll 3 while being sandwiched between the pair of regulating wall portions 6 in a substantially tight contact state. The operator (user) raises the lock arm 8 to the release position Pa2 in FIG. 1, brings the gripped roll 3 close to the roll holding mechanism 9 from above, and sets it to the set position Ps. Thereafter, the operator (user) rotates the lock arm 8 about the rotation axis Al in the clockwise direction in FIG. 1 to tilt to the restriction position Pa1 (see FIG. 6), and locks the roll 3 at the set position Ps. The roll holding mechanism 9 has a configuration that is plane-symmetric with respect to a virtual plane (not shown) perpendicular to the axis C of the roll 3. A platen roller 11 facing the thermal head is provided on the base 4A. The sheet 2 is sandwiched between the platen roller 11 and the thermal head 10, and the sheet 2 is pulled out from the roll 3 by rotating the platen roller 11 with a motor (not shown).

  As shown in FIG. 2, the base part 5 has a rectangular bottom wall part 5a and a side wall part 5b surrounding the bottom wall part 5a. In addition, the regulation wall portion 6 includes a rectangular base portion 6a placed on the bottom wall portion 5a and a vertical wall portion 6b protruding vertically from the base portion 6a. A circular through hole 6c is formed in the vertical wall portion 6b. The width of the peripheral edge portion of the through hole 6c is substantially constant, and the upper portion of the vertical wall portion 6b is formed in a ring shape.

  The movable arm 7 includes a leaf spring 7a as an arm portion, and a shaft support portion 7b that is fixed to the distal end side of the leaf spring 7a and moves according to elastic deformation of the leaf spring 7a. The leaf spring 7 a is adjacent to the outer surface 6 d of the restriction wall 6. A lower part serving as a base end part of the leaf spring 7 a is fixed to the base part 6 a of the restriction wall part 6. And the leaf | plate spring 7a is extended in strip | belt shape with the fixed width toward the upper direction of the bottom wall part 5a along the outer surface 6d, and the upper end part of the leaf | plate spring 7a becomes a free end. Here, the movement of the leaf spring 7 a toward the roll 3 is restricted by the restriction wall 6. On the other hand, the movement of the leaf spring 7a to the opposite side of the roll 3 is not restricted when the lock arm 8 is erected. Accordingly, the leaf spring 7a can be elastically bent outward in the axial direction of the roll 3, as shown in FIG. In the present embodiment, the leaf spring 7a corresponds to an elastic member.

  The shaft support 7 b has a columnar protrusion 7 c that protrudes on the opposite side of the roll 3. The protrusion 7c is press-fitted into a circular through hole 7d formed in the leaf spring 7a, and protrudes through the through hole 7d to the opposite side of the roll 3. That is, in this embodiment, the leaf spring 7a holds the shaft support portion 7b in a fixed manner. However, this is merely an example, and the plate spring 7a may be configured to rotatably hold the shaft support portion 7b using the through hole 7d as a bearing.

  Further, the shaft support portion 7b has a truncated cone-shaped insertion portion 7e that protrudes toward the roll 3 and is inserted into the shaft tube 3a of the roll 3 (see FIGS. 3 and 4). As shown in FIG. 4, in a state where the leaf spring 7 a stands and is in the proximity position Pb <b> 1, the shaft support portion 7 b penetrates the through hole 6 c of the restriction wall portion 6, and the insertion portion 7 e opens the shaft tube 3 a of the roll 3. It is inserted into the part 3b. The distal end side of the insertion portion 7e is chamfered to form an inclined surface 7f.

  As shown in FIG. 2, the shaft support portion 7 b includes three projecting portions 7 g that project outward in the radial direction of the roll 3 between the leaf spring 7 a and the insertion portion 7 e. When the distance between the inner surfaces 6e, 6e of the vertical wall portions 6b facing each other and the width W of the roll 3 (see FIG. 1) exactly match, as shown in FIG. The end surface 7 h is in contact with the axial end 3 c of the roll 3.

  A rail 5 c extending along the axial direction of the roll 3 is provided on the bottom wall portion 5 a of the base portion 5. The restriction wall 6 is held so as to be slidable along the longitudinal direction of the rail 5 c, that is, the axial direction of the roll 3.

  When setting the roll 3 on the roll holding mechanism 9, the operator (user) first slides the restriction wall portion 6 along the rail 5 c, so that the pair of restriction wall portions 6 are opposed to the vertical wall portions 6 b facing each other. Positioning is performed so that the distance between the inner surfaces 6e, 6e substantially coincides with the width W of the roll 3.

  Next, as shown in FIG. 1, the operator (user) brings the roll 3 closer to the roll holding mechanism 9 from above. At this time, as shown in FIG. 3, since the axial end portion 3 c of the roll 3 pushes the axial support portion 7 b outward in the axial direction, the movable arm 7 is elastically bent and tilts outward in the axial direction of the roll 3. The position of the movable arm 7 at this time corresponds to the separation position Pb2. When the roll 3 comes into contact with the shaft support portion 7b, the lower end portion of the axial end portion 3c of the roll 3 comes into contact with the inclined surface 7f of the shaft support portion 7b. Therefore, compared with the case where the inclined surface 7f is not formed, the roll 3 can be more smoothly lowered and the movable arm 7 can be inclined more smoothly.

  When the operator (user) moves the gripped roll 3 further downward, as shown in FIG. 4, the movable arm 7 returns from the tilted posture to the standing posture by the elastic biasing force of the leaf spring 7a itself, The insertion portion 7e of the shaft support portion 7b is inserted into the shaft tube 3a. In this way, a state in which the roll holding mechanism 9 holds the roll 3 is obtained. The position of the movable arm 7 at this time corresponds to the proximity position Pb1. 3 and 4 show only the configuration and operation of one end portion in the axial direction, the same configuration and operation are performed at the other end portion (however, mirror images are related). That is, in this embodiment, the operator (user) can relatively easily attach the roll 3 to the roll holding mechanism 9 by bringing the roll 3 close to the roll holding mechanism 9 (lowering in the present embodiment). . Also, when removing the roll 3 from the roll holding mechanism 9, the operator (user) raises the roll 3 from the roll holding mechanism 9 after raising the lock arm 8 from the restriction position Pa <b> 1 to the release position Pa <b> 2. It can be removed relatively easily.

  The lock arm 8 is supported on the outer surface 6 d of the regulating wall 6 so as to be rotatable about a rotation axis Al parallel to the axis C of the roll 3. The lock arm 8 can be moved between the standing release position Pa2 (see FIGS. 1 and 5 and the like) and the tilted regulation position Pa1 (see FIGS. 4 and 6 and the like) by the operation of the operator (user). .

  As shown in FIG. 4, the lock arm 8 is located on the opposite side of the roll 3 with respect to the leaf spring 7 a of the movable arm 7 at the restriction position Pa <b> 1. Therefore, in this state, the leaf spring 7a is interposed between the restriction wall portion 6 and the lock arm 8. The lock arm 8 restricts the tilting of the movable arm 7 in the state of the restriction position Pa1.

  As shown in FIG. 5, the lock arm 8 protrudes relatively high from the base 4A at the release position Pa2. Then, the lock arm 8 is rotated about the rotation axis Al from the release position Pa2 to the restriction position Pa1 (clockwise direction in FIGS. 5 and 6), and the cover 4B is rotated from the open state to the closed state about the hinge axis Ah. The direction of rotation (the clockwise direction in FIGS. 5 and 6) coincides. Therefore, in the present embodiment, when the operator (user) closes the cover 4B, the cover 4B pushes down the lock arm 8 at the release position Pa2 and tilts it toward the regulation position Pa1. Thereby, the lock arm 8 can be moved to the regulation position Pa1 more reliably.

  In the present embodiment, the movable arm 7 and the lock arm 8 are fixed to the restriction wall portion 6. Therefore, when the restriction wall 6 is slid along the rail 5 c provided on the base part 5, the movable arm 7 and the lock arm 8 can be moved together with the restriction wall 6. Therefore, the effects of the movable arm 7 and the lock arm 8 can be obtained more reliably regardless of the position of the restriction wall 6, that is, the width W of the roll 3.

  In the present embodiment, the movement of the lock arm 8 from the restriction position Pa1 to the release position Pa2 is restricted by the vertical wall portion 4d of the cover 4B. That is, as shown in FIG. 6, when the cover 4 </ b> B is closed, the vertical wall portion 4 d is close to or abuts on the distal end portion of the lock arm 8. Therefore, in the present embodiment, the vertical wall portion 4d corresponds to the lock release restricting portion. Here, as shown in FIG. 1, the vertical wall portion 4d extends along the hinge axis Ah. Therefore, regardless of the position of the restriction wall 6 according to the size of the roll 3, the vertical wall 4d can restrict the movement of the lock arm 8.

  On the other hand, in the present embodiment, the movement of the lock arm 8 from the regulation position Pa1 to the opposite side of the release position Pa2 is regulated by the shaft support portion 7b. That is, as shown in FIG. 6, the lock arm 8 is disposed on the protrusion 7c of the shaft support 7b at the restricting position Pa1 and extends in a direction crossing the leaf spring 7a. In this embodiment, the protrusion 7c restricts the lock arm 8 from rotating downward, so that the lock arm 8 is positioned on the opposite side of the roll 3 with respect to the plate spring 7a, and the plate spring 7a is tilted. It becomes easier to maintain the regulated state. Further, compared with the case where a member that restricts the movement of the lock arm 8 from the restriction position Pa1 to the opposite side of the release position Pa2 is provided separately from the shaft support portion 7b, the manufacturing effort is reduced and the manufacturing cost is reduced. be able to.

  As described above, the printer roll holding unit 1 according to the present embodiment includes the restriction wall portion 6, the movable arm 7, and the lock arm 8. The restriction wall portion 6 is provided to face the axial end portion 3c of the roll 3 on at least one side (both sides in the present embodiment) of the roll 3 in the axial direction, and restricts the movement of the roll 3 in the axial direction. The movable arm 7 is provided on the side of the roll 3 where the restriction wall portion 6 in the axial direction is provided, and a proximity position Pb1 near the axial end portion 3c of the roll 3 where the shaft support portion 7b enters the shaft tube 3a; The shaft support portion 7b is distant from the axial direction end portion 3c and is movable between a separation position Pb2 where the shaft support portion 7b retreats from the shaft tube 3a. In addition, the movable arm 7 is elastically biased from the separation position Pb2 side to the proximity position Pb1 side. Further, the lock arm 8 includes a restriction position Pa1 for restricting the movable arm 7 from moving from the proximity position Pb1 to the separation position Pb2, and a release position Pa2 for allowing the movable arm to move from the proximity position Pb1 to the separation position Pb2. It was provided to be movable between. Therefore, according to this embodiment, it is possible to more easily attach and detach the roll 3 with the movable arm 7 while ensuring the restriction of the movement of the roll 3 with the restriction wall 6 more reliably. And in the state where the movable arm 7 exists in the proximity position Pb1, since the axial support part 7b approachs into the axial tube 3a, the roll 3 can be hold | maintained more reliably. That is, according to this embodiment, the roll 3 can be more easily attached and detached, and the roll 3 can be held more reliably.

  Moreover, in this embodiment, the movable arm 7 has the leaf | plate spring 7a as an elastic member which supports the axial support part 7b and urges | biases the insertion part 7e of the said axial support part 7b in the insertion direction to the axial tube 3a. Therefore, compared with the case where the member which supports the axial support part 7b, and the urging | biasing member are provided separately, a structure can be simplified and a manufacturing cost can be reduced by extension.

  Further, in the present embodiment, the leaf spring 7 a supports the shaft support portion 7 b in a state where it passes through the through hole 7 d along the axial direction of the roll 3. Further, the lock arm 8 is provided so as to be rotatable around a rotation axis Al parallel to the axis C of the roll 3. Further, the movement of the lock arm 8 from the restriction position Pa1 to the release position Pa2 is restricted by the shaft support portion 7b. Therefore, the structure which controls that the lock arm 8 moves toward the opposite side of the release position Pa2 from the control position Pa1 can be obtained as a relatively simple structure using the shaft support portion 7b.

  In the present embodiment, the cover 4B has the vertical wall portion 4d as a lock release restricting portion that restricts the movement of the lock arm 8 from the restricting position Pa1 to the releasing position Pa2 with the cover 4B closed. Therefore, when the operator (user) closes the cover 4B, a state in which the movement of the lock arm 8 is restricted can be obtained relatively easily.

  Moreover, in this embodiment, the movable arm 7 is arrange | positioned with respect to the control wall part 6 on the opposite side of the roll 3, and the through-hole 6c as a penetration part which the axial support part 7b penetrates in the control wall part 6 is formed. The Therefore, a relatively wide range around the through-hole 6c can be opposed to the axial end 3c of the roll 3, so that the movement of the roll 3 in the axial direction can be more reliably regulated.

  Moreover, in this embodiment, the lock arm 8 is supported by the restriction wall part 6 so that a movement is possible. Therefore, the effect of the lock arm 8 can be obtained regardless of the position of the restriction wall portion 6. In the present embodiment, the movable arm 7 is also movably supported by the restriction wall 6. Therefore, the effect of the movable arm 7 can be obtained regardless of the position of the restriction wall portion 6.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiments, and various modifications can be made. For example, the specifications (shape, structure, number, material, arrangement, etc.) of the restriction wall, movable arm, lock arm, leaf spring, shaft support, base, cover, lock release restriction, penetration, etc. are changed as appropriate Can be implemented. The present invention is also applicable to rolls other than paper. Further, a pair of lock arms may be connected to operate integrally. Moreover, you may use elastic members other than a leaf | plate spring.

  According to the said embodiment, the roll holding | maintenance unit which can hold | maintain rolls, such as paper, more reliably can be obtained.

1 unit (roller holding unit for printer)
3 Roll 3a Axial tube 3c Axial end 4A Base 4B Cover 4d Vertical wall (lock release restricting part)
6 Restriction wall part 6c Through hole (through part)
7 Movable arm 7a Leaf spring (elastic member)
7b Shaft support 8 Lock arm Al Rotating shaft C (Roll) shaft Pa1 Restriction position Pa2 Release position Pb1 Proximity position Pb2 Separation position

JP 2009-1113899 A

Claims (6)

A regulating wall portion that is provided opposite to the axial end portion of the roll on at least one side in the axial direction of the roll and regulates movement of the roll in the axial direction;
A shaft support portion that enters the shaft tube and supports the roll has a shaft tube, and the shaft support portion is adjacent to the position where the restriction wall portion is provided in the axial direction of the roll and the shaft support portion is the shaft tube. A movable arm provided so as to be movable between a separated position where the user moves out;
The movable arm is movably provided between a restriction position that restricts the movement of the movable arm from the proximity position to the separation position and a release position that allows the movable arm to move from the proximity position to the separation position. A lock arm,
With
The movable arm has an elastic member that supports the shaft support and biases the shaft support in the direction of insertion into the shaft tube,
After the movable arm is pushed by the roll moved toward the mounting position along the radial direction of the roll and moved from the proximity position to the separation position, the movable arm is moved from the separation position by the urging force of the elastic member. The printer roll holding unit, wherein the shaft support portion enters the shaft tube by moving to a close position.   The elastic member is fixed to the base on the radially outer side of the roll, extends along the radial direction of the roll, supports the shaft support portion on the distal end side thereof, and the distal end side is separated from the roll along the axial direction of the roll. The roll holding unit for a printer according to claim 1, wherein the roll holding unit is a leaf spring that is elastically deformable to the side. A regulating wall portion that is provided opposite to the axial end portion of the roll on at least one side in the axial direction of the roll and regulates movement of the roll in the axial direction;
A shaft support portion that enters the shaft tube and supports the roll has a shaft tube, and the shaft support portion is adjacent to the position where the restriction wall portion is provided in the axial direction of the roll and the shaft support portion is the shaft tube. A movable arm that is provided so as to be movable between a separation position that retreats outside and is biased from the separation position side to the proximity position side;
The movable arm is movably provided between a restriction position that restricts the movement of the movable arm from the proximity position to the separation position and a release position that allows the movable arm to move from the proximity position to the separation position. A lock arm,
With
The movable arm has an elastic member that supports the shaft support and biases the shaft support in the direction of insertion into the shaft tube,
The elastic member supports the shaft support in a state of passing through the shaft in the axial direction of the roll,
The lock arm is provided to be rotatable around a rotation axis parallel to the axis of the roll,
The printer roll holding unit, wherein movement of the lock arm from the restriction position to the opposite side of the release position is restricted by the shaft support portion. A regulating wall portion that is provided opposite to the axial end portion of the roll on at least one side in the axial direction of the roll and regulates movement of the roll in the axial direction;
A shaft support portion that enters the shaft tube and supports the roll has a shaft tube, and the shaft support portion is adjacent to the position where the restriction wall portion is provided in the axial direction of the roll and the shaft support portion is the shaft tube. A movable arm that is provided so as to be movable between a separation position that retreats outside and is biased from the separation position side to the proximity position side;
The movable arm is movably provided between a restriction position that restricts the movement of the movable arm from the proximity position to the separation position and a release position that allows the movable arm to move from the proximity position to the separation position. A lock arm,
A base that supports the restriction wall, the movable arm, and the lock arm;
A cover covering the base so as to be openable and closable;
With
The printer roll holding unit, wherein the cover has a lock release restricting portion that restricts movement of the lock arm from the restricting position to the release position in a state where the cover is closed. The movable arm is disposed on the opposite side of the roll with respect to the restriction wall;
5. The printer roll holding unit according to claim 1, wherein a through portion through which the shaft support portion passes is formed in the restriction wall portion.   The printer roll holding unit according to claim 1, wherein the lock arm is movably supported by the restriction wall.

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