JP4967822B2 - Roll paper fixing device - Google Patents

Description

  The present invention relates to a roll paper fixing device used in a printer device, and more particularly, to a fixing device that fixes and fixes a roll paper with respect to a roll paper holding shaft without rattling in the axial direction.

  As a conventional method for fixing roll paper (continuous paper) in a printer device, a press plate on a paper insertion side (supply holder) that is movably fitted in the axial direction from the roll paper insertion side of a shaft (supply core) that supports the roll paper. ) In the cylindrical portion at intervals in the circumferential direction, and slits are formed in parallel with the axial center, and the cylindrical portion peripheral wall defined by the slits can be elastically deformed radially inward and outward, and the cylindrical portion A method has been proposed in which a threaded portion is formed on the outer peripheral surface of the shaft, a fixing ring having an inner diameter smaller than the outer diameter of the cylindrical portion is screwed to the threaded portion, and the presser plate is fixed to the shaft (for example, Patent Documents). 1).

In the fixing method, a fixing ring is screwed into the cylindrical portion of the presser plate so that the cylindrical portion that can be elastically deformed by the slit is contracted in the radial direction, and is frictionally locked by being pressed against the outer peripheral surface of the shaft. is there.
For this purpose, the fixing ring is removed from the cylindrical part of the presser plate, the roll paper is inserted into the shaft, the presser plate is fitted to the shaft, and the disc part of the presser plate is attached to the end surface in the axial direction of the roll paper. Then, the fixed ring is fitted from the open end side of the shaft and screwed into the cylindrical portion of the presser plate.

Therefore, there are many procedural operations until the roll paper is set and fixed on the shaft, and the fixing ring for fixing the press plate to the shaft is separated from the press plate, so the fixing ring is lost. Or the problem which forgot to tighten a fixed ring had generate | occur | produced.
Further, the fastening of the fixing ring has a problem that the variation is easily caused by the strength of the operator and the fixing of the presser plate becomes incomplete.

Japanese Patent No. 3779525 (refer to page 12, FIG. 16, FIG. 18, FIG. 23)

  The present invention has been made in view of the problems of the above-described conventional techniques, and an object of the present invention is to provide a fixing device that can reliably fix roll paper with a simple operation without variation. .

In order to achieve the above object, the roll paper fixing device of the present invention has a roll paper fitted and mounted on a roll paper holding shaft through which the roll paper is inserted and supported, and both ends of the roll paper in the axial direction are regulated by a roll paper presser plate. In the roll paper fixing device that rotatably supports the roll paper, a pair of roll paper pressing plates that are fitted to the holding shaft are arranged on the outer periphery of the roll paper holding shaft, and the outer peripheral surface of the roll paper holding shaft The roll paper pressing plate further includes an external force applying means that presses the friction member in the radial direction and fixes the roll member to the roll paper holding shaft, and the roll paper is operated by operating the external force applying means. The structure is such that the presser plate can be engaged with and disengaged from the roll paper holding shaft .
The roll paper holding shaft has a cantilever structure in which one end in the axial direction is fixed substantially at right angles to the vertical member and the other end protrudes horizontally, or both sides in the axial direction can be attached and detached with the vertical member. Any of the both-end supported structures supported by the Further, the roll paper holding shaft may be any of a fixed type, a type inserted through a support shaft and rotating, and a roll paper holding shaft incorporating a roll paper centering mechanism.
The fixing device may be either provided on the roll paper presser plates on both sides in the axial direction for sandwiching the roll paper, or provided on one roll paper presser plate in the axial direction. When the roll paper holding shaft has a cantilever structure, the roll paper presser plate arranged on the fixed side does not need to be slid with respect to the roll paper holding shaft, so there is no need to incorporate a friction member. The fixing device is attached only to the roll paper holding plate disposed on the open end side of the roll paper holding shaft.
The roll paper pressing plate has a cylindrical portion that can be fitted to the outside of the roll paper holding shaft, and a hook-shaped pressing plate that protrudes substantially perpendicular to the outer side of the cylindrical portion, and the roll paper is contained in the cylindrical portion. A receiving tube that can be fitted to the holding shaft may be provided.
Therefore, the friction member is built in the receiving cylinder when the roll paper pressing plate has the receiving cylinder in the cylindrical portion, and is incorporated in the cylindrical portion when the receiving roll is not provided. In the case where a receiving cylinder is provided, the receiving cylinder may be either integrally fitted into the cylinder portion or may be individually fitted as a separate structure.
Further, the friction member built in the roll paper pressing plate may have a ring shape that contacts the entire circumference of the outer peripheral surface of the roll paper holding shaft, or a cross section that contacts a part of the shaft peripheral surface by cutting a part of the ring. Any of C shape etc. may be sufficient. However, in the case of a continuous ring shape, slits may be formed at intervals in the circumferential direction in order to receive an external force and smoothly perform the diameter reducing operation.
The friction member may be an elastic member having a large coefficient of friction, such as rubber, felt, a single material of a resin material, a laminate thereof, or a combination with other members. In short, the outer peripheral surface of the roll paper holding shaft When the friction member is pressed against the roll paper pressing plate, the roll paper pressing plate that accommodates the friction member may not move in the axial direction or rotate in the circumferential direction.
The roll paper referred to in the present invention is not limited to a roll of long strip paper, but may be a so-called roll consumable such as a roll of film.

According to the above means, the roll paper pressing plate is fitted to the outside of the roll paper holding shaft so that the external force applying means is operated so that the external force does not act on the friction member. Then, when the roll paper pressing plate is fitted at a predetermined position on the roll paper holding shaft, the external force applying means is operated so that the external force acts on the friction member. Then, the friction member built in the roll paper presser plate is pressed inward in the radial direction by an external force of an ammunition or the like previously provided in the external force applying means, and the outer peripheral surface of the roll paper holding shaft is tightly pressure-bonded. Thereby, the roll paper pressing plate is fixed to the roll paper holding shaft via the friction member. Therefore, the roll paper supported between the pair of roll paper presser plates is held in a fixed position so that the movement of the roll paper holding shaft in the axial direction is restricted.
Since the roll paper presser plate is integrally provided with an external force applying means for fixing the presser plate to the roll paper holding shaft, there is no fear of forgetting fixing or losing the fixing member.

Since the roll paper presser plate includes a friction member inside, the roll paper presser plate is provided with a receiving tube inside. However, the receiving tube and the roll paper presser plate are configured independently of each other so that they are sequentially assembled to the roll paper holding shaft. Alternatively, the receiving tube and the roll paper pressing plate may be assembled to form an integral structure, and may be fitted to the roll paper holding shaft as one.
The specific structure of the friction member includes, for example, a frictional engagement plate disposed corresponding to the outer peripheral surface of the roll paper holding shaft, and a tightening plate laminated on the radial outer side of the frictional engagement plate. Then, one end in the circumferential direction of the clamping plate is fixed to a receiving tube disposed inside the roll paper pressing plate, and the point of action of the external force applying means is set at a position corresponding to the circumferentially open side of the clamping plate. To place .
The friction engagement plate is an elastic member having a large friction coefficient as described above, such as rubber, felt, resin material, etc., and the tightening plate is a member that bends and deforms due to external force, such as stainless steel plate, steel plate, iron plate, etc. The fastening plate is formed in a substantially C-shaped cross section.

According to the above means, when an external force is applied by the external force applying means to the open end side of the fastening plate to which one end in the circumferential direction is fixed, the fastening plate uses the fixed end as a fulcrum in the outer peripheral surface direction (diameter). The frictional engagement plate disposed inside the tightening plate is pressed against the outer peripheral surface of the roll paper holding shaft by moving the tightening plate in the center direction. Thereby, the receiving cylinder provided with the friction member is frictionally locked to the roll paper holding shaft so as not to move in the axial direction and the circumferential direction.
When the external force applied to the tightening plate is removed (the roll paper presser plate is removed from the receiving tube or the external force applied is released), the tightening plate with one end in the circumferential direction fixed away from the roll paper holding shaft Accordingly, the frictional engagement plate that has been crimped to the outer peripheral surface of the roll paper holding shaft is also released, and the receiving tube can move in the axial direction and the circumferential direction with respect to the roll paper holding shaft.

As a specific structure of the external force applying means for applying an external force to the friction member, for example, a configuration using a lever principle can be cited. The structure is such that a lever is arranged along the circumferential direction of the cylinder portion of the roll paper pressing plate facing the outer peripheral surface of the receiving cylinder, and the lever is always urged outward on the force point side of the lever. And a projection that penetrates through the cylinder portion on the side of the working point and further presses the friction member accommodated therein through the receiving cylinder from the outside in the radial direction (Claim 2 ).

  According to the above means, the roll is pressed by pressing the force point side of the lever against the elastic force of the ammunition, thereby bringing the protrusion on the action point side into the cylindrical portion of the roll paper presser plate. The paper pressing plate can be fitted to the outside of the receiving cylinder. Then, the roll paper presser plate is rotated in the circumferential direction, and when the position of the protrusion, which is the acting point of the lever, coincides with the hole for receiving the protrusion provided in the receiving cylinder, the protrusion is arranged on the force point side. Since it is urged inward in the radial direction by the elastic force, the end of the projection presses the friction member accommodated in the receiving cylinder. As a result, a member (friction engagement plate) disposed on the innermost side of the friction member is pressure-bonded to the outer peripheral surface of the roll paper holding shaft, and the receiving tube is frictionally engaged with the roll paper holding shaft. The roll paper presser plate is connected and integrated through a lever. Therefore, by gripping the force point side of the lever arranged in the cylinder part of the roll paper presser plate together with the cylinder part, after fitting the cylinder part of the roll paper presser plate into the cylinder, releasing the grip of the cylinder part, The roll paper presser plate can be fixed with a constant pressure by the elastic force of the bullet machine.

Further, the external force applying means for applying an external force to the friction member is not limited to the insulator, and may be configured as follows. For example, a pusher is disposed in a cylindrical portion of the roll paper presser plate facing the outer peripheral surface of the receiving cylinder so as to be able to be ejected and retracted radially outward, and the pusher is disposed on the outside of the cylindrical part. A rotary knob that pushes inward in the radial direction against the elastic force may be arranged (claim 3 ).
The form of the rotary knob that pushes the pusher inward in the radial direction against the resilience of the ammunition is arranged with a ring-like knob that moves within a certain range in the circumferential direction of the cylindrical portion. In the structure where the lower surface is inclined along the rotation direction, and the pusher is pressed radially inward by the movement of the inclined surface accompanying the rotation of the ring-like knob, or the cylindrical portion of the roll paper presser plate, Any structure may be used, such as a structure in which a knob protruding and retracting inward in the radial direction is screwed and the knob is pressed by rotation of the knob.

  According to the above means, by operating the rotary knob provided on the tube portion of the roll paper presser plate, the pusher built in the tube portion is pressed radially inward against the resilience of the bullet machine. The pusher pressurizes the friction member built in the receiving cylinder. As a result, a member (friction engagement plate) disposed on the innermost side of the friction member is pressure-bonded to the outer peripheral surface of the roll paper holding shaft, and the receiving tube is frictionally engaged with the roll paper holding shaft.

According to the roll paper fixing device of the present invention, the roll paper pressing plate is fitted on the outer side of the receiving tube and the external force applying means provided on the cylindrical portion of the roll paper pressing plate is operated. Thus, the presser plate for attaching the roll paper can be easily fixed to the roll paper holding shaft.
Since the roll paper presser plate is integrally provided with an external force applying means for fixing the presser plate to the receiving tube, there is no fear of forgetting to fix or losing the fixing member.
According to the second aspect of the present invention, the friction member built in the receiving cylinder is pressure-bonded in surface contact with the outer peripheral surface of the roll paper holding shaft. Thereby, a stable fixed state can be established.

Further, according to the configuration of claim 3, the force point side of the lever disposed on the cylindrical portion of the roll paper holding plate is gripped together with the cylindrical portion, and the cylindrical portion of the roll paper pressing plate is fitted into the receiving cylinder, and then the cylindrical portion By releasing the grip, the roll paper presser plate can be fixed with a constant crimping force due to the elastic force of the bullet machine.
In addition, it is possible to prevent forgetting to fix or to cause a variation in the fixed state due to the strength of the operator's power, and to always establish a stable fixed state.
Further, according to the configuration of claim 4, after the roll paper presser plate is fitted into the receiving cylinder, the friction member is securely pressure-bonded by operating the rotary knob provided in the cylindrical part integrated with the presser plate, The roll paper pressing plate can be fixed.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below based on the drawings with respect to a roll paper holding shaft having a cantilever fixing type.
1 to 5 show an embodiment in which an insulator is used as an external force applying means equipped on a roll paper presser plate. In the figure, reference numeral 1 denotes a roll paper holding shaft, which is larger than the maximum width roll paper used in the printer device. Is formed to be long, and one end in the axial direction (left side in FIG. 1) is fixed to a vertically supported mounting substrate 21 on which a printing mechanism of a printer device (not shown) is arranged, and is fixed and protrudes horizontally. The other end side (the right side in the drawing) of the roll paper holding shaft 1 is open, and the roll paper R, the receiving tube that supports the roll paper R, and the axial position of the roll paper R are regulated from the open end side. The roll paper presser plate or the like to be inserted can be inserted or removed.
As the roll paper R, a label with a base paper in which a label paper is detachably attached at a predetermined interval to a base paper wound in a roll shape, or a label paper is wound into a roll shape and cut for each label after printing Examples include a label without a mount to be used separately, and a film roll.

A receiving tube 2 is fixed to the fixed end side of the roll paper holding shaft 1 and a fixed roll paper pressing plate 3 is fixed to the outside of the receiving tube 2, thereby being inserted from the open end side of the roll paper holding shaft 1. The position on the back side of the roll paper R is regulated.
The receiving cylinder 2 is a cylindrical body with a hook (stepped) in which a flange 2b having a diameter larger than the outer diameter of the cylindrical body 2a is protruded radially outward at one end of the short cylindrical body 2a. The fixed roll paper presser plate 3 is fitted and fixed to the outside of the cylindrical body 2a. The axial end surface of the fixed roll paper retainer plate 3 abuts the axial end surface of the collar portion 2b of the receiving tube 2 to determine the position of the fixed roll paper retainer plate 3, and the outer peripheral surface of the flange portion 2b is It functions as a support for the roll paper R.

  The fixed roll paper presser plate 3 includes a tube portion 3a that fits outside the tube body 2a of the receiving tube 2, and a press plate that has a diameter larger than the outer diameter of the tube portion 3a at one end in the axial direction of the tube portion 3a. The outer diameter of the presser plate 3b is appropriately determined according to the outer diameter of the roll paper R set on the roll paper holding shaft 1. Also, the receiving cylinder 2 and the fixed roll paper presser plate 3 are fixed to the roll paper holding shaft 1 by inserting a set screw from the outside of the fixed roll paper presser plate 3 inward in the radial direction. And the three members of the receiving tube 2 and the roll paper holding shaft 1 are arbitrarily fixed.

  The receiving tube 4 inserted into the holding shaft 1 from the open end side of the roll paper holding shaft 1 is similar to the receiving tube 2 on the fixed end side at the one end in the axial direction of the short tube body 4a. A flanged cylinder (stepped cylinder) having a flange 4b larger than the outer diameter projecting radially outward, and an outer peripheral surface of the roll paper holding shaft 1 is wound inside the cylinder 4a. A friction member 5 to be worn is incorporated, and a through hole 6 is formed on the outer peripheral surface of the cylindrical body 4a. The through hole 6 is fitted into and disengaged from the point of application of external force applying means for pressing the friction member 5 inward in the radial direction. Yes.

The friction member 5 has a substantially C-shaped frictional engagement plate 5a disposed in correspondence with the outer peripheral surface of the roll paper holding shaft 1, and a cross-section approximately stacked on the radially outer side of the frictional engagement plate 5a. It is composed of a C-shaped fastening plate 5b.
The frictional engagement plate 5a disposed in correspondence with the outer peripheral surface of the roll paper holding shaft 1 is a member having a large friction coefficient, such as a rubber material, a felt material, or a metal material (stainless steel, steel, iron, etc.), A band plate made of a resin material or the like is formed such that the longitudinal direction of the band plate is curved in a substantially C-shaped cross section, and the roll paper holding shaft 1 can be wound from the outside.
Further, the fastening plate 5b disposed outside the frictional engagement plate 5a is formed by bending a deformed metal band plate such as a stainless steel plate, a steel plate, an iron plate, etc. in a substantially C-shaped cross section along the longitudinal direction thereof. And the one end of the circumferential direction is fixed to the inner peripheral surface of the said receiving cylinder 4, and the other end is open | released.
Accordingly, when an external force acts on the open end side of the tightening plate 5b and the open end side of the tightening plate 5b moves radially inward, the friction engagement plate 5a disposed inside the tightening plate 5b accordingly. Is pressed inward in the radial direction and pressed against the outer peripheral surface of the roll paper holding shaft 1. The circumferential length of the tightening plate 5b is preferably about ½ of the circumferential length in order to efficiently press the friction engagement plate 5a against the outer circumferential surface of the roll paper holding shaft 1, and is longer than that. In this case, it is difficult to press the fastening plate evenly against the frictional engagement plate by applying an external force to one place.

  The through-hole 6 opened in the cylinder 4a of the receiving cylinder 4 is a hole into which the action point side of the external force applying means 8 provided in the movable roll paper presser plate 7 to be described later is fitted, and the shape of the through-hole 6 is the action point. However, as shown in FIG. 1, a guide groove 9 is notched on the outer peripheral surface from the axial end surface of the cylinder 4a to the through hole 6 as shown in FIG. May be.

  The movable roll paper presser plate 7 projects toward the outer side in the radial direction on the outer periphery of the cylindrical body 4a of the receiving cylinder 4 and the short cylindrical section 7a having a circular cross section and the outer periphery of one end of the short cylindrical section 7a in the axial direction. It is comprised with the provided large diameter presser plate 7b. The outer diameter of the presser plate 7 b is appropriately determined according to the outer diameter of the roll paper R set on the roll paper holding shaft 1. Since the roll paper R is sandwiched between the press plate 3b of the fixed roll paper press plate 3 fixed to the fixed end side of the roll paper holding shaft 1 and the press plate 7b of the movable roll paper press plate 7, the fixed roll paper The outer diameters of the presser plate 3b of the presser plate 3 and the presser plate 7b of the movable roll paper presser plate 7 are preferably the same outer diameter.

In addition, a friction member 5 built in the receiving cylinder 4 is reduced in diameter in the cylindrical portion 7 a, and is crimped and locked to the outer peripheral surface of the roll paper holding shaft 1, and the movable roll paper pressing plate 7 is interposed via the receiving cylinder 4. Is provided with an external force applying means 8 for fixing the paper to the roll paper holding shaft 1.
As shown in FIG. 5, the external force applying means 8 is configured such that the insulator 10 arranged along the circumferential direction of the cylindrical portion 7 a and one force point 10 b side sandwiching the fulcrum 10 a of the insulator 10 have a constant diameter around the fulcrum. It is composed of a bullet machine 11 that urges outward in the direction, and a projection 12 that projects from a surface corresponding to the outer peripheral surface of the receiving cylinder 4 on the other action point 10c side across the fulcrum. Thus, the projection 12 penetrates the through hole 6 of the receiving cylinder 4 and presses the fastening plate 5b of the friction member 5.

The insulator 10 is attached to the cylindrical portion 7a by opening a groove 13 into which the fulcrum 10a and the action point 10c side of the insulator 10 are fitted in the peripheral wall of the cylindrical portion 7a, and the fulcrum 10a of the insulator 10 is inserted into the groove 13 by the shaft 14. An elastic machine (coil spring) 11 is elastically mounted across the force point 10b side of the lever 10 and the elastic machine mounting recess 15 established in the cylindrical part 7a. Thereby, the insulator 10 is pressed by the action point 10c side centering on the fulcrum 10a toward the radial inside.
Further, on the opposite side of the lever 10 to the side on which the bullet point 11 on the force point 10b side is attached, an operation portion 10d that pushes the force point 10b side of the lever 10 against the elastic force of the bullet unit 11 toward the cylindrical portion 7a. Are formed substantially at right angles.

Next, an operation for setting the roll paper R on the roll paper holding shaft 1 will be described.
First, the roll paper R is inserted from the open end side of the roll paper holding shaft 1 shown in FIG. 1, and the core tube R ′ of the roll paper R is received by the flange portion 2 b of the tube 2, and the flange portion 4 b of the receiver tube 4. Support with.
Next, the movable roll paper holding plate 7 is fitted to the outside of the cylindrical body 4a of the receiving cylinder 4 from the open end side of the roll paper holding shaft 1, and when the movable roll paper holding plate 7 is fitted, the cylinder portion The operating portion 10d formed on the side of the force point 10b of the lever 10 of the external force applying means 8 provided on the 7a is gripped together with the cylindrical portion 7a against the elastic force of the bullet machine 11. Thereby, the action point 10c side of the insulator 10 is pulled upward in the radial direction with the shaft 14 as a fulcrum, and the tip (lower end) of the protrusion 12 protruding from the action point 10c side is held in the peripheral wall of the cylindrical portion 7a and is movable. When the roll paper presser plate 7 is fitted on the outer side of the receiving cylinder 4, there is no obstacle to insertion.

  Accordingly, the movable roll paper presser plate 7 is fitted to the outer side of the cylinder 4a of the cylinder 4 while holding the operation part 10d, and after fitting, when the grip (pressurization) of the operation part 10d of the lever 10 is released, The action point 10 c side of the lever 10 is pushed downward by the elastic force of the bullet machine 11 arranged on the force point 10 a side, and the protrusion 12 on the action point 10 c side is the groove 13 of the cylinder part 7 a and the through hole 6 of the receiving cylinder 4. And the fastening plate 5b of the friction member 5 built inside the receiving tube 4 is pressed. As a result, the fastening plate 5b whose one end in the circumferential direction is fixed is pressed inward in the radial direction by the pressing, so that the contact between the fastening plate 5b and the roll paper holding shaft 1 is achieved. The form changes from point contact to surface contact. As a result, the frictional engagement plate 5 a stacked and arranged on the inner side (lower side) of the tightening plate 5 b is pressed and adhered to the outer peripheral surface of the roll paper holding shaft 1. Accordingly, the receiving cylinder 4 is frictionally fixed to the roll paper holding shaft 1 by the friction member 5, and the receiving cylinder 4 and the movable roll paper presser plate 7 are engaged and integrated through the external force applying means 8. As a result, as shown in FIG. 2, the movable roll paper pressing plate 7 fitted from the open end side of the roll paper holding shaft 1 is fixed in a state in which it cannot move in the axial direction and the circumferential direction with respect to the roll paper holding shaft 1. The roll paper R is rotatably supported on the receiving cylinders 2 and 4 while being sandwiched between the fixed roll paper presser plate 3 and the movable roll paper presser plate 7.

  The above-described procedure for attaching the movable roll paper pressing plate 7 is a case where the position of the protrusion 12 of the lever 10 is previously received and inserted on the line of the through hole 6 of the cylinder 4 and the position is inserted. However, even when the position of the protrusion 12 of the lever 10 and the through hole 6 of the receiving cylinder 4 do not match, after the movable roll paper pressing plate 7 is fitted into the receiving cylinder 4, the movable roll paper pressing plate 7 is rotated in the circumferential direction on the outer peripheral surface of the receiving cylinder 4, so that the protrusion 12 of the insulator 10 attached to the cylindrical portion of the movable roll paper presser plate 7 is received by the elastic force of the bullet machine 11. When the projection 12 is positioned at the position of the through hole 6 of the receiving cylinder 4, the projection 12 is automatically fitted into the through hole 6. Then, the friction member 5 is energized.

Further, when the movable roll paper presser plate 7 is fitted, if the roll paper holding shaft 1 is fitted from the open end side without grasping the operation portion 10d of the lever 10, the protrusion 12 of the lever 10 is caused to be elastic. Since it protrudes from the inner peripheral surface through the groove 13 of the cylindrical portion 7a by force, the projection 12 comes into contact with the axial end surface of the receiving cylinder 4 and the fitting is prevented. In this state, the operation portion 10d of the lever 10 is gripped against the resilience of the bullet machine 11, the protrusion 12 is pulled up radially outward (upward), and the movable roll paper presser plate 7 is held while maintaining this state. The outer periphery of the receiving tube 4 is rotated in the circumferential direction. When the protrusion 12 of the lever 10 matches the guide groove 9 to the through hole 6 cut out on the end face of the receiving cylinder 4, the movable roll paper presser plate 7 can move along the axial direction, and the guide groove After moving to the terminal end of 9, since the through hole 6 exists at that position, the projection 12 passes through the through hole 6 and presses the friction member 5.
In any of the above-described operations, the friction member 5 is finally pressed against the roll paper holding shaft 1 by the elastic force of the bullet machine 11 and the movable roll paper presser plate 7 is fixed. Regardless of the strength of the power, a stable fixed state can always be established.

The external force applying means 8 for crimping the friction member 5 in the above embodiment is an application of an insulator, and other examples will be described with reference to FIGS. The same members as those in the previous embodiment are denoted by the same reference numerals, and description thereof is omitted.
FIG. 6 shows that a pusher 16 that presses the friction member 5 built in the receiving cylinder 4 radially inward is accommodated in the cylindrical portion 7a of the movable roll paper presser plate 7 so as to be able to protrude and retract in the radial direction. The machine 17 is elastically biased outward in the radial direction. A push-down plate 18 is disposed across the top of the pusher 16 projecting radially outward from the outer peripheral surface of the cylindrical portion 7a and the outer peripheral surface of the cylindrical portion 7a. A pusher 16 that presses radially inward (downward) by turning in the circumferential direction (clockwise direction) of a rotary knob 19 attached to the outside of 7a, and penetrates the through hole 6 as shown in FIG. The fastening plate 5b of the friction member 5 is pressed. As a result, the frictional engagement plate 5a laminated on the inner side (lower side) of the tightening plate 5b is pressure-bonded to the outer peripheral surface of the roll paper holding shaft 1, and as a result, the movable roll paper presser plate 7 passes through the receiving cylinder 4. Thus, it is fixed so that it cannot move axially and circumferentially. The rotary knob 19 is formed with an upward inclined surface at the tip side along the rotation direction, and is configured so that the pressing plate 18 is smoothly pressed by the rotation.
When releasing the fixing of the movable roll paper presser plate 7, if the rotary knob 19 is rotated counterclockwise, the pusher 6 is moved radially outward by the resilience of the machine 17 along with the rotation ( Upward) is returned to the origin position (state shown in FIG. 6), and the pressure bonding of the outer peripheral surface of the roll paper holding shaft 1 by the friction member 5 is also released. In addition, in order to regulate the rotation range of the rotary knob 19 and efficiently perform the fixing / releasing operation of the movable roll paper presser plate 7, stoppers 20 and 20 ′ may be provided on the outer peripheral surface of the cylindrical portion 7a. .

  FIG. 8 is a perspective view of the embodiment shown in FIGS. 6 and 7, in which a rotary knob 19 'for pushing the pusher 16 inward (downward) in the radial direction is attached to the cylindrical portion 7a by screwing. The pusher 16 is moved along the vertical direction by turning, and the pusher 16 is pushed down (fixed) by turning clockwise, and the pusher 16 is returned to the origin position (unfixed) by turning counterclockwise. You may comprise as follows.

The roll paper fixing device of the present invention is not limited to the above-described embodiment, and can be changed without changing the gist of the invention.
(1) The fitting shape between the cylindrical portion of the movable roll paper presser plate and the cylindrical body of the receiving cylinder is not limited to the illustrated circle, and may be a square such as a regular hexagon or a regular square.
(2) The frictional force between the outer peripheral surface of the roll paper holding shaft and the frictional engagement plate is not limited to the method of generating based on the magnitude of the friction coefficient of the frictional engagement plate itself shown in the embodiment. The method of generating automatically may be used. For example, the range in which the receiving tube is attached to the outer peripheral surface of the roll paper holding shaft is an uneven rough surface, and the contact surface of the friction engagement plate on the receiving tube side facing the roll paper holding shaft is the same uneven rough surface. In addition, the frictional force necessary for fixing may be generated by engaging the uneven rough surfaces. In that case, the material of the frictional engagement plate is not limited.
(3) The roll paper holding shaft of this embodiment is a fixed type with a cantilever structure, but the roll paper holding shaft is pipe-shaped and is rotatably fitted to a support shaft fixed to the mounting substrate. The paper holding shaft, the receiving tube, the roll paper presser plate, and the roll paper may be rotated together.
(4) Although only one (the open end side of the roll paper holding shaft) of the roll paper presser plate of this embodiment is provided with the main fixing device, the other roll paper presser (the fixed end side of the roll paper holding shaft) is provided. The plate may also be configured to include this fixing device.
(5) When the support form of the roll paper holding shaft is a cantilever structure as in this embodiment, among the roll paper presser plates that regulate both ends of the roll paper in the axial direction, the fixed end side of the roll paper holding shaft is A fixed wall surface (attachment substrate) for fixing the roll paper holding shaft may be used as a roll paper pressing plate.
(6) Although the roll paper holding shaft of this embodiment has a cantilever structure, the roll paper fixing device of the present invention can also be used for a double-supported structure that detachably supports both sides of the roll paper holding shaft in the axial direction. It is.
(7) The roll paper fixing device of the present invention is not limited to a roll of roll-shaped paper, but may be a roll-type consumable such as a film roll, and a roll-type consumable is held by a holding shaft. It can also be used for an apparatus that restricts both ends in the direction.
(8) Although the receiving cylinder disposed inside the cylinder portion of the roll paper presser plate in the present embodiment is configured to be separated from the roll paper presser plate, a configuration in which both members are joined and integrated may be employed.

It is a top view which shows an example of implementation of the roll paper fixing apparatus which concerns on this invention, and shows the state which removed the movable roll paper presser plate. The same top view which shows the state which attached the movable roll paper pressing board. The same side view. The expanded longitudinal cross-sectional view which follows the (4)-(4) line | wire of FIG. FIG. 3 is an enlarged longitudinal sectional view taken along line (5)-(5) in FIG. 2. The longitudinal cross-sectional view which shows the other example of an external force provision means, and shows the state before fixation. The longitudinal cross-sectional view which shows the state which operated and fixed the rotary knob. The fragmentary sectional view which shows the other example of an external force provision means.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Roll paper holding shaft 2, 4 ... Receptacle 3 ... Roll paper presser plate (fixed) 5 ... Friction member 5a ... Friction engagement plate 5b ... Fastening plate 6 ... Through hole 7 ... Roll paper presser plate (movable)
7a ... Cylinder portion 7b ... Presser plate 8 ... External force imparting means 10 ... Insulator 10a ... Supporting point 10b ... Power point 10c ... Action point 11 ... Emulator 12 ... Protrusion 16 ... Pusher 17 ... Emperor 19, 19 '...

Claims (3)

In the roll paper fixing device that fits and attaches the roll paper to the roll paper holding shaft that inserts and supports the roll paper, regulates both ends of the roll paper in the axial direction with the roll paper presser plate, and supports the roll paper rotatably.
On the outer periphery of the roll paper holding shaft, a pair of roll paper pressing plates that are fitted to the holding shaft are disposed, and a friction member that winds the outer peripheral surface of the roll paper holding shaft is provided,
The roll paper presser plate is provided with an external force applying means that presses the friction member in the radial direction and fixes it to the roll paper holding shaft, and the roll paper presser plate can be engaged with and disengaged from the roll paper holding shaft .
The friction member is composed of a frictional engagement plate disposed corresponding to the outer peripheral surface of the roll paper holding shaft, and a tightening plate having a substantially C-shaped cross section disposed in a layered outer side in the radial direction of the frictional engagement plate,
One end of the tightening plate in the circumferential direction is fixed to a receiving tube disposed inside the roll paper pressing plate, and the point of application of the external force applying means is disposed at a position corresponding to the circumferentially open side of the tightening plate. and the roll holder device, characterized in that are. The external force applying means is a lever attached to the cylindrical portion of the roll paper presser plate so as to be capable of elastically swinging, and an elastic machine that constantly biases the lever outward is arranged on the force point side, and on the action point side. roll holder device according to claim 1, wherein a projection for pressing the friction member from the radially outward through the cylindrical portion. The external force imparting means is arranged on the cylindrical portion of the movable roll paper presser plate so that the pusher can be ejected and retracted radially outward. claim 1 roll holder device, wherein in that a turning knob to push the anti and radially inward.

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