JP2018034330A - Roll body holding mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to adjust the position of an outer peripheral surface of a roll body while holding the roll body in a roll body holding mechanism. SOLUTION: The roll body holding mechanism according to the embodiment has a housing, an accommodating portion having an inner bottom surface of the housing, and a contact surface provided in the accommodating portion and in contact with a side surface of the roll body. A restricting portion that regulates the movement of the roll body in the width direction is provided so as to be swingable between a protruding position protruding from the contact surface and a non-protruding position not protruding from the contact surface, and the roll body is provided at the protruding position. It has a holding portion that rotatably holds, an urging member that urges the holding portion in the direction from the non-protruding position to the protruding position, and the holding portion and the urging member, which are brought into contact with and separated from the inner bottom surface of the housing. It is provided with a roll holding unit that is movable in a direction and is provided so that the position relative to the regulation unit can be changed. [Selection diagram] Fig. 3

Description

  The present invention relates to a roll body holding mechanism that holds a roll body formed by winding a belt-shaped print medium.

  2. Description of the Related Art Conventionally, a roll body holding mechanism that holds a roll body is known in a printer that stores a roll body such as roll paper on which printing paper is wound. For example, Patent Document 1 discloses a pair of guide plates that regulate the side surface of a roll paper, a protruding position that is provided in the guide plate housing portion and protrudes from a contact surface of the guide plate with respect to the roll paper, and a contact with the roll paper. Disclosed is a roll body holding device having a swingable holding portion in the same plane as the contact surface or in a storage position located in the storage portion. According to this roll body holding device, it is said that there is an effect that the roll paper can be easily attached and detached.

  In general, there are roll papers having the same outer diameter but having paper tubes with different diameters (for example, roll papers having paper tube diameters of 1 inch and 2 inches).

JP 2011-157153 A

By the way, in the conventional roll body holding mechanism, for example, when a roll paper of a small diameter paper tube is held, the outer peripheral surface of the roll paper may interfere with an opening / closing part such as a printer opening / closing cover located above the roll paper. . This is for the following reason.
For example, a case is assumed in which the height of the protruding position of the holding unit is set on the assumption that the roll paper of a large diameter paper tube is held in the roll paper holding device of the cited document 1. Here, the thickness of the portion of the printing paper excluding the paper tube is larger in the roll paper of the small diameter paper tube than in the roll paper of the large diameter paper tube. Therefore, when the roll paper of the small diameter paper tube is held instead of the roll paper of the large diameter paper tube, the uppermost position of the outer peripheral surface of the roll paper of the small diameter paper tube is higher than that of the roll paper of the large diameter paper tube. Get higher. Therefore, in the conventional roll body holding mechanism, when the roll paper of the small diameter paper tube is held instead of the roll paper of the large diameter paper tube, the opening / closing of the printer in which the outer peripheral surface of the roll paper is positioned above the roll paper is performed. May interfere with open / close parts such as covers.

  Therefore, an object of the present disclosure is to enable adjustment of the position of the outer peripheral surface of the roll body while holding the roll body in the roll body holding mechanism.

One aspect of the present disclosure is a roll body holding mechanism that holds a roll body around which a belt-shaped print medium is wound.
This roll body holding mechanism
A housing,
A housing portion having an inner bottom surface of the housing;
A regulating portion that is provided in the housing portion, has a contact surface that contacts the side surface of the roll body, and regulates movement in the width direction of the roll body;
A holding portion that is swingably provided between a protruding position protruding from the contact surface and a non-projecting position not protruding from the contact surface, and holds the roll body rotatably at the protruding position;
A biasing member that biases the holding portion in a direction from the non-projecting position toward the projecting position;
A roll holding unit having the holding part and the biasing member, movable in a direction contacting and separating from the inner bottom surface of the housing, and capable of changing a relative position with respect to the restriction part;
Is provided.

  According to the roll body holding mechanism according to the present disclosure, the position of the outer peripheral surface of the roll body can be adjusted while holding the roll body.

It is a perspective view which shows the case where an opening-and-closing part is an open state about the printer concerning an embodiment. It is a perspective view which shows the case where an opening / closing part is a closed state about the printer which concerns on embodiment. It is a perspective view of the roll body holding mechanism which concerns on embodiment. 4A is a plan view illustrating a state in which the engagement between the housing and the lock member of the movement mechanism according to the embodiment is maintained, and FIG. 4B illustrates the engagement between the housing and the lock member of the movement mechanism according to the embodiment. It is a top view which shows the state currently cancelled | released. It is a disassembled perspective view of the roll holding unit of the roll body holding mechanism according to the embodiment. It is a fragmentary perspective view of the control part of the roll body holding mechanism concerning an embodiment. It is the side view which looked at a part of roll body holding mechanism concerning an embodiment from one side. It is the side view which looked at a part of roll body holding mechanism concerning an embodiment from the other side. 9A and 9B are schematic front views when a roll paper is inserted into the roll body holding mechanism according to the embodiment. FIG. 10A is a schematic front view when a roll paper of a large diameter paper tube is held in the roll body holding mechanism according to the embodiment, and FIG. 10B is a roll of a small diameter paper tube in the roll body holding mechanism according to the embodiment. It is a schematic front view at the time of hold | maintaining paper. FIG. 11A is a diagram schematically showing a restricting portion according to a modification, and FIG. 11B is a diagram schematically showing a roll holding unit according to the modification. FIG. 12A is a diagram schematically showing a restricting portion according to a modified example, and FIG. 12B is a diagram schematically showing a roll holding unit according to the modified example.

  Hereinafter, embodiments of a printer according to the present invention will be described.

(1) Printer Configuration A printer according to the first embodiment will be described below with reference to FIGS. 1 and 2.
FIG. 1 is a perspective view illustrating a case where the opening / closing unit 3 is in an open state with respect to the printer 1 according to the embodiment. FIG. 2 is a perspective view illustrating the printer 1 according to the embodiment when the opening / closing part 3 is in a closed state.

As shown in FIGS. 1 and 2, the printer 1 of this embodiment includes a housing 2, an opening / closing unit 3, a display panel 4, a platen roller 5, a thermal head 6, and a storage unit 8. The housing 2 is formed according to the outer shape of the printer 1.
As shown in FIG. 1, the bottom surface of the printer 1 has a substantially rectangular shape, and the direction along the long side is defined as the front-rear direction. That is, the side where the platen roller 5 on the downstream side in the transport direction is provided is defined as the front (FR), and the upstream side in the transport direction on the opposite side is defined as the rear (RR). The right side (RH), left side (LH), upper side (UP), and lower side (LO) are defined on the basis of the front-rear direction. In the following description, the right (RH) direction or the left (LH) direction is referred to as a lateral direction, and the upper (UP) direction or the lower (LO) direction is referred to as an up-down direction, as appropriate.

  The accommodating portion 8 is a space that is provided inside the housing 2 and accommodates the roll paper R. The lower portion is the inner bottom surface 8a of the housing, the upper portion is the inner surface of the opening / closing portion 3, and the left-right direction is the inner side surface of the housing. It is surrounded and formed. The opening / closing part 3 is a cover that opens or closes the accommodating part 8. The opening / closing part 3 and the rear end part of the housing 2 are pivotally supported by a shaft 31 so as to be swingable.

The roll paper R is an example of a roll body in which a belt-like continuous paper P (an example of a print medium) is wound around a paper tube RC in a roll shape. In the illustrated example, the continuous paper P includes a belt-like mount PM and a plurality of labels PL temporarily attached to the mount at predetermined intervals.
In the printer 1 of the present embodiment, the continuous paper P is fed out from the roll paper R by the rotation of the platen roller 5, but the storage unit 8 has a transport path from the continuous paper P to the platen roller 5 after the continuous paper P is fed out. The space to be formed is also included.

  The accommodating portion 8 is provided with a roll body holding mechanism 10. The roll body holding mechanism 10 rotatably holds the roll paper R in the accommodating portion 8 and restricts the movement of the roll paper R in the width direction. In the roll body holding mechanism 10 of the present embodiment, a moving mechanism (described later) is incorporated so as to cope with various roll papers R having different widths.

  As shown in FIG. 1, a platen roller 5 is pivotally supported on the downstream side in the transport direction of the housing 2 so as to be rotatable in the forward and reverse directions. The platen roller 5 is a conveying unit that conveys the continuous paper P fed out from the roll paper R, and is formed in a state of extending along the width direction of the continuous paper P. The platen roller 5 is mechanically connected to a stepping motor (not shown) or the like and driven.

  As shown in FIG. 2, a display panel 4 is provided on the front side of the opening / closing part 3. The display panel 4 provides an input / output interface for the user in a state where the opening / closing unit 3 is closed, and is a liquid crystal display panel having a touch panel function, for example.

  The thermal head 6 is a printing unit that prints information such as characters, symbols, figures, barcodes, and the like on the label PL of the continuous paper P fed out from the roll paper R. Although not visible in FIG. 2, the thermal head 6 faces the platen roller 5 while the printing surface of the thermal head 6 faces the sheet passing route of the continuous paper P when the opening / closing part 3 is closed. On the printing surface of the thermal head 6, a plurality of heating resistors (heating elements) that generate heat when energized are arranged along the width direction of the continuous paper P. The thermal head 6 is connected to a circuit board (not shown) that transmits a print signal to the thermal head 6. The continuous paper P printed by the thermal head 6 is discharged out of the printer 1 from a discharge port 7 (see FIG. 2) that is a gap between the housing 2 and the opening / closing unit 3 when the opening / closing unit 3 is closed.

Although not shown, a coil spring is provided on the back side of the thermal head 6 as a biasing member that applies a biasing force to the thermal head 6.
When the open / close unit 3 is closed and printing is being performed, the continuous paper P fed from the roll paper R is conveyed between the platen roller 5 and the thermal head 6 while being conveyed by the platen roller 5. At this time, the thermal head 6 is pressed against the platen roller 5 by the urging force, thereby generating a head pressure suitable for printing.

(2) Configuration of Roll Body Holding Mechanism 10 Next, the configuration of the roll body holding mechanism 10 will be described with reference to FIGS.
FIG. 3 is a perspective view of the roll body holding mechanism 10 according to the present embodiment.
FIG. 4A is a plan view illustrating a state in which the engagement of the housing and the lock member of the moving mechanism 20 included in the roll body holding mechanism 10 according to the embodiment is maintained. FIG. 4B is a plan view showing a state in which the engagement of the housing and the lock member of the moving mechanism 20 included in the roll body holding mechanism 10 according to the embodiment is released.
FIG. 5 is a side view of a part of the roll body holding mechanism 10 according to the present embodiment from one side surface. FIG. 6 is a side view of a part of the roll body holding mechanism 10 according to the present embodiment from the other side surface. FIG. 7 is an exploded perspective view of the roll holding unit of the roll body holding mechanism 10 according to the present embodiment. FIG. 8 is a partial perspective view of the restricting portion of the roll body holding mechanism 10 according to the present embodiment.

Referring to FIG. 3, the roll body holding mechanism 10 includes restriction portions 12L and 12R and roll holding units 14L and 14R. As will be described later, the roll holding units 14L and 14R are engaged with the restricting portions 12L and 12R, respectively.
The restricting portions 12L and 12R are plate-like members extending in the front-rear direction of the printer 1, have a contact surface 12s (see FIG. 7) that contacts the side surface Rs of the roll paper R, and the width direction of the roll paper R. Regulate the movement of The roll holding units 14L and 14R are provided so that the relative positions with respect to the restricting portions 12L and 12R can be changed.

  As will be described later, the direction in which the relative positions of the roll holding units 14L and 14R are changed is perpendicular to the swing shaft 143C of the holding portion 1432 when viewed from the direction perpendicular to the contact surfaces 12s of the restricting portions 12L and 12R. Direction (referred to as “first direction”). That is, it is a direction in which the housing 2 is in contact with or separated from the inner bottom surface 8a (that is, a direction in which it approaches or separates from the inner bottom surface 8a). In the example of the present embodiment, the first direction is the upper (UP) direction (upward) of the printer 1 or the lower (LO) direction (downward).

In the roll body holding mechanism 10 of the present embodiment, the restricting portions 12L and 12R can move in a direction approaching or moving away from each other (that is, in the lateral direction or the width direction of the roll paper R accommodated in the accommodating portion 8). A moving mechanism 20 is incorporated. That is, the movement mechanism 20 can adjust the lateral positions of the restricting portions 12L and 12R according to the width of the roll paper R.
The moving mechanism 20 has a pair of racks 22 </ b> L and 22 </ b> R and a pinion 24 in a housing 21. The restricting portion 12L and the rack 22L are connected to each other by a fastening member 220L from the back surface of the housing 21 so as to be integrally movable in the lateral direction. The restricting portion 12R and the rack 22R are connected by a fastening member 220R from the back surface of the housing 21 so as to be integrally movable in the lateral direction.

The lock member 16 is a member for restricting lateral movement of the restricting portions 12L and 12R (that is, locking the restricting portions 12L and 12R) or releasing the restriction in accordance with a user operation. The lock member 16 includes an operation unit 161 to be operated by the user, a shaft unit 162, and an engagement unit 163 for engaging with the back surface of the housing 21. The lock member 16 is attached to the restricting portion 12L at the shaft portion 162 so as to be swingable about the shaft portion 162.
FIG. 3 shows a state in which the movement of the restricting portions 12L and 12R in the lateral direction is not restricted.

  FIG. 4A shows a state in which the engagement between the housing 21 of the moving mechanism 20 and the lock member 16 is maintained. In the example shown in FIG. 4A, the engaging portion 163 of the lock member 16 is composed of a continuous V-shaped (or sawtooth-shaped) groove. On the back surface 21 </ b> R of the housing 21 of the moving mechanism 20, a continuous V-shaped (or sawtooth wave) groove is formed at a position facing the engaging portion 163, similar to the engaging portion 163. Here, as shown in FIG. 3, a coil spring 18 that biases the lock member 16 counterclockwise in a side view from the left side to the right side of the printer 1 is provided. Therefore, when there is no operation input to the operation part 161, as shown in FIG. 4A, the engagement part 163 of the lock member 16 and the engagement part 211 of the housing 21 are engaged, and the restriction parts 12L and 12R are in the lateral direction. Movement is restricted.

FIG. 4B shows a state where the housing 21 of the moving mechanism 20 and the lock member 16 are disengaged (the same state as FIG. 3). To release the engagement between the housing 21 and the lock member 16 from the state shown in FIG. 4A, the user moves the operation portion 161 of the lock member 16 backward against the urging force of the coil spring 18. Then, the lock member 16 rotates clockwise in a side view from the left side to the right side of the printer 1, and the engagement between the engagement portion 163 of the lock member 16 and the engagement portion 211 of the housing 21 is released. In the state where the operation unit 161 is positioned rearward, the rack and pinion of the moving mechanism 20 can operate, and thus the lateral movement of the restricting units 12L and 12R is not restricted. Therefore, in this state, the user can set the restricting portions 12L and 12R at desired positions in the width direction of the roll paper R according to the width of the roll paper R to be accommodated in the accommodating portion 8.
When the operation with respect to the operation portion 161 is stopped after setting the restricting portions 12L and 12R to desired positions, the engagement portion 163 of the lock member 16 and the engagement portion 211 of the housing 21 are engaged again by the biasing force of the coil spring 18. Then, the movement of the restricting portion 12L in the horizontal direction is restricted.

  Next, the roll holding units 14L and 14R will be described with reference to FIG. FIG. 5 shows the roll holding unit 14L, but the roll holding unit 14R has the same shape.

Referring to FIG. 5, the roll holding unit 14 </ b> L includes a plate-like main body portion 141, a shaft portion 142, a swing member 143, and a torsion spring 144. The plate-shaped main body 141 has a rectangular shape as a whole.
The swing member 143 has a cylindrical portion 1431 (two places) provided at one end, a holding portion 1432 provided at the other end, and a body portion 1433 that connects the cylindrical portion 1431 and the holding portion 1432. Then, it swings around the swing shaft 143C. The holding portion 1432 is provided so as to be swingable between a protruding position that protrudes from the contact surface 12s of the restricting portion 12L and a non-projecting position that does not protrude from the contact surface 12s as the swinging member 143 swings. The roll paper R is rotatably held at the position.

  A shaft portion 142 and a torsion spring 144 are attached to the opening 1410B below the plate-like main body portion 141. A hollow portion of the cylindrical portion 1431 of the swing member 143 is inserted into the shaft portion 142, whereby the holding portion 1432 of the swing member 143 is centered on the shaft portion 142 (that is, centering on the swing shaft 143C). It can swing.

The torsion spring 144 biases the swing member 143 about the swing shaft 143C in the direction of the rotation direction d1 in FIG. 5, thereby moving the holding portion 1432 of the swing member 143 from the non-projecting position toward the projecting position. Energize to.
The swinging member 143 is biased by the torsion spring 144, and the body 1433 is in contact with the stopper 1410C. In a state where the body portion 1433 is in contact with the stopper 1410C, the holding portion 1432 of the swing member 143 protrudes inward from the opening surface 1410A of the plate-like main body portion 141 to the contact surface 12s of the regulating portion 12L with respect to the roll paper R. The protruding position. When the roll paper R is inserted into the accommodating portion 8 and is held by the roll body holding mechanism 10, the outer peripheral surface and the side surface Rs of the roll paper R abut against the holding portion 1432, whereby the holding portion 1432 is biased by the torsion spring 144. Against this, it swings in the direction of the rotation direction d2 in FIG. As a result, the holding portion 1432 swings to a non-projecting position that does not project inward from the contact surface 12s.

  In addition, it is preferable to have the inclined surface 1432F inclined with respect to the side surface Rs of the roll paper R when the roll paper R is held. Since the inclined surface 1432F is inclined inward and forward of the printer 1, when the user opens the opening / closing unit 3 and stores the roll paper R in the storage unit 8, the roll paper R is applied to the inclined surface 1432F. Easy to touch. When the roll paper R is moved in the downward direction (an example of the first direction) while being in contact with the inclined surface 1432F, the swing member 143 swings toward the non-projecting position against the biasing force of the torsion spring 144. Is possible. That is, by providing the inclined surface 1432F, when the user inserts the roll paper R into the storage unit 8, the holding unit 1432 can be smoothly swung in the direction of the rotation direction d2.

Attachment portions 1412 and 1414 for attaching the roll holding unit 14L to the restricting portion 12L are formed in a portion corresponding to the long side of the rectangular plate-like main body portion 141.
The plate-shaped main body 141 has a U-shaped first recess 1416L and a second recess 1416H in order to make it possible to change the relative position of the roll holding unit 14L in the vertical direction (that is, the first direction) with respect to the restricting portion 12L. And a groove portion 1417 is provided. The first concave portion 1416L, the second concave portion 1416H, and the groove portion 1417 are examples of engaging portions of the plate-like main body portion 141, respectively.
The attachment mode of the roll holding unit 14L and the restricting portion 12L will be described later.

Next, the restriction portions 12L and 12R will be described with reference to FIG. FIG. 6 illustrates the main part of the restricting portion 12L, but the shape of the restricting portion 12R is similar.
Referring to FIG. 6, a substantially rectangular opening 120 is formed in the restricting portion 12 </ b> L in order to receive the rectangular roll holding unit 14 </ b> L. Thin portions 122 and 124 that are thinner than the other portions are formed on the periphery of the opening 120 in order to attach the attachment portions 1412 and 1414 of the roll holding unit 14L.
A first convex portion 126 (two locations) and a second convex portion 127 (two locations) projecting inward are formed on the periphery of the opening 120. The 1st convex part 126 and the 2nd convex part 127 are examples of the engaging part of a control part.

Next, a configuration in a state where the roll holding unit 14L is attached to the restricting portion 12L will be described with reference to FIGS.
First, the first direction described above will be described with reference to FIG. In FIG. 7, when viewed from the direction orthogonal to the contact surface 12s of the restricting portion 12L (that is, the direction orthogonal to the paper surface of FIG. 7), the direction orthogonal to the swing shaft 143C of the holding portion 1432 (that is, the housing 2). D1 is the first direction. As shown in FIG. 7, in the example of the present embodiment, the first direction coincides with the upward direction or the downward direction.

  In a state where the roll holding unit 14L is attached to the restricting portion 12L, the first convex portion 126 engages with the first concave portion 1416L or the second concave portion 1416H (see FIG. 5) of the roll holding unit 14L, and the second convex portion 127. Engages with the groove 1417 (see FIG. 5) of the roll holding unit 14L. The position of the roll holding unit 14L in the vertical direction (that is, the first direction) is determined depending on which of the first concave portion 1416L and the second concave portion 1416H of the roll holding unit 14L is engaged with the first convex portion 126.

In the example shown in FIGS. 7 and 8, the first convex portion 126 of the restricting portion 12L is inserted into the second concave portion 1416H, whereby the roll holding unit 14L is relatively (that is, the first convex portion 126 is the first convex portion 126). The case where it is set to a low position (compared to the case of being inserted into the recess 1416L) is shown. Although not visible in FIGS. 7 and 8, the second convex portion 127 of the restricting portion 12L is engaged with the groove portion 1417 of the roll holding unit 14L. As shown in FIG. 5, the groove portion 1417 is a groove extending long in the up-down direction, and therefore, the first convex portion 126 of the restricting portion 12L is engaged with either the first concave portion 1416L or the second concave portion 1416H. Even so, the second convex portion 127 of the restricting portion 12 </ b> L is engaged with the groove portion 1417.
In FIG. 8, the spring support portion 128 is a portion that supports the rear end of the coil spring 18 (see FIG. 3) in the front-rear direction.

As shown in FIGS. 7 and 8, in a state where the roll holding unit 14L is attached to the restricting portion 12L, the mounting claws 1412B of the roll holding unit 14L engage with one surface of the thin portion 124, and the roll holding unit 14L The attachment claws 1412C (two places) engage with the other surface of the thin portion 124. That is, the attachment claws 1412B and 1412C are configured to sandwich the thin portion 124 from both sides.
Since the flexible arm portions 1412A and 1414A can be detached from the thin-walled portions 122 and 124 by bending the flexible arm portions 1412A and 1414A, the roll holding units 14L and 14R are respectively connected to the regulating portions 12L and 12R. Can be removed.

  Referring to FIG. 7, the surface 141 s of the plate-like main body 141 faces the side surface Rs of the roll paper R, like the contact surface 12 s of the restricting portion 12 </ b> L. And it is preferable that the contact surface 12s of the control part 12L and the surface 141s of the plate-shaped main-body part 141 are the same planes. When both are on the same plane, the roll paper R is effectively held from the initial use of the roll paper R having a large outer diameter to the late use of the roll paper R having a small outer diameter. Can continue.

(3) Operation of Roll Body Holding Mechanism 10 Next, the operation of the roll body holding mechanism 10 will be described with reference to FIGS.
9A and 9B are schematic front views when the roll paper R is inserted into the roll body holding mechanism 10 according to the embodiment. FIG. 10A is a schematic front view when the roll body holding mechanism 10 according to the embodiment holds the roll paper R1 of the large diameter paper tube, and FIG. 10B shows the small diameter paper in the roll body holding mechanism 10 according to the embodiment. It is a schematic front view at the time of hold | maintaining the roll paper R2 of a pipe | tube. 9 and 10 do not show the attachment portions 1412 and 1414 of the roll holding units 14L and 14R.

(3-1) Operation when Inserting Roll Paper Hereinafter, the operation of the roll body holding mechanism 10 when inserting roll paper will be described with reference to FIGS. 9A and 9B. 9A and 9B, the user moves the pair of restricting portions 12L and 12R in the horizontal direction before inserting the roll paper R, and determines the distance between the pair of restricting portions 12L and 12R as the width of the roll paper R. It is assumed that they match. Further, the contact surfaces 12s of the restricting portions 12L and 12R when the surface is the same as the surface 141s of the plate-like main body 141 are indicated by phantom lines.
As shown in FIG. 9A, in a state before the roll paper R is inserted, the holding portion 1432 of the plate-like main body 141 is in a protruding position protruding inward from the contact surfaces 12s of the restricting portions 12L and 12R.

In FIG. 9A, the holding portions 1432 of the roll holding units 14L and 14R are in a protruding position protruding inward from the contact surface 12s.
When the user inserts the roll paper R into the storage unit 8 of the printer 1, between the roll holding units 14L and 14R of the roll body holding mechanism 10 (that is, between the regulating units 12L and 12R (not shown in FIG. 9A)). The roll paper R is inserted from top to bottom. At this time, the lowermost part of the outer peripheral surface of the roll paper R starts to contact the holding portion 1432 of the roll holding units 14L and 14R. Then, as shown in FIG. 9B, the holding portion 1432 moves outward about the shaft portion 142 against the urging force of the torsion spring 144 (not shown in FIG. 9B) due to the downward insertion force with respect to the roll paper R. Rotate. As a result, the holding portion 1432 of the plate-like main body portion 141 swings from the contact surface 12s of the restricting portions 12L and 12R to a non-projecting position that does not protrude inward.

  When the roll paper R advances further downward and the hollow portion of the paper tube RC of the roll paper R reaches the same height as the holding portion 1432, the holding portion 1432 swings inward by the urging force of the torsion spring 144. As a result, in the hollow portion of the paper tube RC of the roll paper R, the holding portion 1432 swings to the protruding position protruding inward from the contact surfaces 12s of the restricting portions 12L and 12R. As a result, the state shown in FIG. 10A referred to later is obtained, and the roll paper R is held by the roll holding units 14L and 14R.

(3-2) Operation when changing the height of the outer peripheral surface of the held roll paper Next, with reference to FIG. 10A and FIG. 10B, the height of the outer peripheral surface of the held roll paper The operation of the roll body holding mechanism 10 when changing the position will be described. 10A and 10, the diameter of the outer peripheral surface of the roll paper R1 of the large diameter paper tube is the same as that of the roll paper R2 of the small diameter paper tube.

  In FIG. 10A, in the same manner as shown in FIGS. 9A and 9B, a roll paper R1 having a large diameter paper tube is inserted between the roll holding units 14L and 14R, and the roll paper R1 is inserted into the roll holding units 14L and 14R. The held state is shown. At this time, the first convex portions 126 of the restricting portions 12L and 12R are inserted into the first concave portions 1416L, whereby the roll holding units 14L and 14R are set at relatively high positions. Note that the height position (level) of the uppermost portion of the outer peripheral surface of the roll paper R1 in the case of FIG.

  Although not shown, it is assumed that a roll paper R2 having a small diameter paper tube is inserted instead of the roll paper R1 having a large diameter paper tube in FIG. 10A. In that case, since the roll paper R2 of the small diameter paper tube has a larger thickness than the roll paper R1 of the large diameter paper tube, the uppermost position of the outer peripheral surface of the roll paper R2 is shown in FIG. 10A. Higher than level H. Therefore, there is a possibility that the roll paper R2 held by the roll holding units 14L and 14R interferes with other members on the upper part, for example, the opening / closing unit 3 or the like.

  When the roll paper R2 interferes with other members when the roll paper R2 having a small diameter paper tube is inserted, the roll body holding mechanism 10 according to the present embodiment has the uppermost portion of the outer peripheral surface of the roll paper R2 in the held state. The position can be lowered. Specifically, as shown in FIG. 10B, the first convex portions 126 of the restricting portions 12L and 12R are inserted into the second concave portions 1416H, whereby the roll holding units 14L and 14R are set at a relatively low position. As described above, the user performs an operation of changing the height of the roll holding units 14L and 14R. Then, since the position of the holding portion 1432 is lowered, the position of the uppermost portion of the outer peripheral surface of the roll paper R2 of the small diameter paper tube can be prevented from exceeding H.

Note that the user's operation to change the height of the roll holding units 14L and 14R (operation to lower the height) is as follows. This operation is performed in a state where the roll paper R is not inserted.
First, the engagement between the first concave portions 1416L of the roll holding units 14L and 14R and the first convex portions 126 of the restricting portions 12L and 12R is released. That is, by bending the flexible arm portions 1412A and 1414A from the state in which the attachment portions 1412 and 1414 are attached to the thin portions 122 and 124 by the attachment claws, the first concave portion 1416L and the first convex portion 126 are deformed. Release the engagement.
Next, the roll holding unit 14L is rotated clockwise in FIG. 10A and the roll holding unit 14R is rotated counterclockwise in FIG. 10A with the second recess 127 (see FIG. 10) as a fulcrum. In this state, the roll holding units 14L and 14R are relatively movable (slidable) in the vertical direction (that is, the first direction) while maintaining the state of being attached to the restricting portions 12L and 12R, respectively.
Next, the roll holding units 14L and 14R are moved downward relative to the restricting portions 12L and 12R, respectively, and the second concave portion 1416H is engaged with the first convex portion 126. Thereby, the roll holding units 14L and 14R are set to a low position.
The operation of the user increasing the height of the roll holding units 14L and 14R is the same.

  As described above, according to the roll body holding mechanism 10 of the present embodiment, the holding portion 1432 and the torsion spring 144 as the biasing member are integrated as the roll holding units 14L and 14R with respect to the regulating portions 12L and 12R. The roll holding units 14L and 14R are attached to the restricting portions 12L and 12R, respectively. Further, since the relative positions of the roll holding units 14L and 14R with respect to the restricting portions 12L and 12R can be changed in the direction in which the roll holding units 14L and 14R are brought into contact with and separated from the inner bottom surface 8a of the casing 2, The position of the outer peripheral surface of the paper R can be adjusted. Therefore, even when a roll paper having a different diameter of the paper tube is inserted, the roll paper can interfere with other members such as the opening / closing unit 3 of the printer 1 by adjusting the height of the holding unit 1432. Can be prevented.

  As mentioned above, although embodiment of this invention was described in detail, the roll body holding | maintenance mechanism of this invention is not limited to the said embodiment, You may make various improvement and change in the range which does not deviate from the main point of this invention. Of course.

  In the above-described embodiment, the roll holding unit is provided with two concave portions (for example, the first concave portion 1416L and the second concave portion 1416H with respect to the roll holding unit 14L), and the holding portion is regulated in two steps in the first direction. The relative position can be changed. However, by setting the number of the concave portions of the roll holding unit to three or more, it is possible to change the relative position of the holding portion in the first direction with respect to the regulating portion in multiple stages of three or more stages. Such an example is shown in FIGS. 11A and 11B.

  FIG. 11A is a view schematically showing the periphery of the opening 120 in the restricting portion 12P according to the modification, and FIG. 11B is a view schematically showing the plate-like main body portion of the roll holding unit 14P according to the modification. In the illustrated example, the roll holding unit 14P is provided with three recesses 14161 to 14163. In this example, any one of the concave portions 14161 to 14163 and the first convex portion 126 of the restricting portion 12P engage with each other, so that the relative position in the vertical direction of the roll holding unit 14P with respect to the restricting portion 12P is 3 It can be adjusted in stages.

  In the above-described embodiment, the first protrusion 126 of the restriction portions 12L and 12R is engaged with either the first recess 1416L or the second recess 1416H of the plate-like main body 141 of the roll holding unit 14L, thereby holding the holding portion. Although the example which adjusts the height of 1432 was demonstrated, it is not the limitation. A plurality of convex portions for adjusting the height of the holding portion 1432 may be provided on the restricting portions 12L and 12R. Such an example is shown in FIGS. 12A and 12B.

  FIG. 12A is a view schematically showing the periphery of the opening 120 in the restricting portion 12Q according to the modified example, and FIG. 11B is a view schematically showing the plate-like main body portion of the roll holding unit 14P according to the modified example. In the illustrated example, the roll holding unit 14Q includes a single recess 1416 instead of the first recess 1416L and the second recess 1416H. On the other hand, the restricting portion 12Q includes two convex portions 126L and 126H instead of the single first convex portion 126. By engaging the concave portion 1416 of the restricting portion 12Q of the roll holding unit 14Q with one of the two convex portions 126L and 126H of the restricting portion 12Q, the roll holding unit 14Q is relatively relative to the restricting portion 12Q in the vertical direction. The position can be adjusted.

  In the above-described embodiment, the roll holding unit is provided with the concave portions (for example, the first concave portion 1416L and the second concave portion 1416H with respect to the roll holding unit 14L), and the restricting portion has the convex portion (for example, the first with respect to the restricting portion 12L). Although the convex portion 126 and the second convex portion 127) are provided, the present invention is not limited to this configuration. It is good also as a structure which provides a convex part in a roll holding unit and provides a recessed part in a control part.

  In the embodiment described above, a pair of restricting portions 12L and 12R and a pair of roll holding units 14L and 14R are provided so as to hold the roll paper R from both side surfaces Rs, and the roll paper R is transferred to the printer 1 by the action of the moving mechanism 20. Although the structure hold | maintained in the center of the horizontal direction of this was demonstrated, it is not this limitation. When the roll paper R is held near the left side or the right side of the printer 1, the restricting portion and the roll holding unit may be provided on either the left or right side.

  In the embodiment described above, the restricting portions 12L and 12R and the roll holding units 14L and 14R are plate-shaped members, but this is not restrictive. However, by making these members plate-shaped, there is an advantage that a large space in the width direction of the roll paper R can be secured when the roll body holding mechanism 10 is mounted on the printer 1.

  In the above-described embodiment, the configuration in which the roll body holding mechanism 10 includes the moving mechanism 20 is illustrated, but the configuration is not limited thereto. When the width of the roll paper R stored in the storage unit 8 is constant, it is not necessary to move the regulating units 12L and 12R in the width direction of the roll paper R, and thus the moving mechanism 20 is not necessary. Even in that case, it is possible to adjust the height of the holding portion 1432 attached to the restricting portions 12L and 12R.

  In the embodiment described above, as the roll paper R held by the roll body holding mechanism 10, the continuous paper P is a strip-like mount PM and a plurality of labels PL temporarily attached on the mount at predetermined intervals. However, the present invention is not limited thereto. The type of roll paper R is not limited, and may be a roll of printing paper that does not include an adhesive, or may be a roll of long printing paper with adhesive on the back. .

DESCRIPTION OF SYMBOLS 1 ... Printer 2 ... Housing | casing 3 ... Opening / closing part 31 ... Shaft 4 ... Display panel 5 ... Platen roller 6 ... Thermal head 7 ... Discharge port 8 ... Storage part 10 ... Roll body holding mechanism 12L, 12R ... Restriction part 12s ... Restriction part Contact surface 120 ... openings 122, 124 ... thin wall portion 126 ... first convex portion (engagement portion)
127 ... 2nd convex part (engagement part)
128 ... Spring support portions 14L, 14R ... Roll holding unit 141 ... Plate-shaped main body portion 141s ... Surfaces 1410A, 1410B ... Opening 1410C ... Stopper 1412 ... Mounting portion 1412A ... Flexible arm portions 1412B, 1412C ... Mounting claws 1414 ... Mounting portion 1414A ... Flexible arm parts 1414B, 1414C ... Mounting claws 1416L ... First recess (engagement part)
1416H ... 2nd recessed part (engagement part)
1417: Groove 142 ... Shaft 143 ... Swing member 1431 ... Cylindrical part 1432 ... Holding part 1433 ... Body part 1432F ... Inclined surface 144 ... Torsion spring 16 ... Lock member 161 ... Operation part 162 ... Shaft part 163 ... Engagement part 18 ... Coil spring 20 ... Moving mechanism 21 ... Housing 21R ... Back surface 211 ... Engagement parts 22L, 22R ... Racks 220L, 220R ... Fastening member 24 ... Pinion R ... Roll paper Rs ... Roll paper side RC ... Paper tube P ... Continuous Paper PM ... Mount PL ... Label

Claims (8)

A roll body holding mechanism for holding a roll body around which a belt-shaped print medium is wound,
A housing,
A housing portion having an inner bottom surface of the housing;
A regulating portion that is provided in the housing portion, has a contact surface that contacts the side surface of the roll body, and regulates movement in the width direction of the roll body;
A holding portion that is swingably provided between a protruding position protruding from the contact surface and a non-projecting position not protruding from the contact surface, and holds the roll body rotatably at the protruding position;
A biasing member that biases the holding portion in a direction from the non-projecting position toward the projecting position;
A roll holding unit having the holding part and the biasing member, movable in a direction contacting and separating from the inner bottom surface of the housing, and capable of changing a relative position with respect to the restriction part;
A roll body holding mechanism. The roll holding unit includes a plate-like main body portion to which the urging member and the holding portion are attached,
The plate-like main body is attached to the restricting portion so as to be slidable in the first direction.
The roll body holding mechanism according to claim 1. The restricting portion and the plate-like main body portion each have an engaging portion,
A plurality of engaging portions of at least one of the restricting portion and the plate-like main body portion are provided,
The position of the roll holding unit in the first direction is determined by engaging one of the restricting portion and the plate-shaped main body portion with one of the other plurality of engaging portions. ,
The roll body holding mechanism according to claim 2. The surface of the plate-shaped main body is flush with the contact surface of the restricting portion.
The roll body holding mechanism according to claim 2 or 3. The holding portion has an inclined surface inclined with respect to a side surface of the roll body when the roll body is held;
When the roll body is moved along the first direction while contacting the inclined surface, the holding portion can swing toward the non-projecting position against the urging force of the urging member. is there,
The roll body holding mechanism according to claim 1. The roll holding unit is configured to be attachable to and detachable from the restriction portion.
The roll body holding mechanism according to claim 1. In order to hold the roll body from both side surfaces of the roll body, the regulation part and the roll holding unit are provided in pairs,
The roll body holding mechanism according to claim 1. A moving mechanism that allows the regulating portion to move in the width direction of the roll body;
The roll body holding mechanism according to claim 1.

Images