JP2001294366A - Winding core holding mechanism and winder using it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To hold two kinds of winding cores with different thickness without any replacement of a part and to carry out positioning in a predetermined reference position in either winding core. SOLUTION: A winding core holding mechanism 32 supporting at least one end part of a winding core 4 for winding paper, a film, or a fabric film media into a roll is provided with a base 57 fixed in the axial direction of the winding core 4, a large-diameter reference part 58, which can be protruded/retracted axially to the base 57 and abutted to an end face 4a of a large-diameter winding core 4', a taper-faced large-diameter centering part 59, which can be protruded/ retracted axially to the large-diameter reference part 58 and fitted to the large- diameter winding core 4', a small-diameter reference part 60, which can be protruded/retracted axially to the base and abutted to an end face 4b in the small-diameter winding core 4", and a taper-faced small-diameter centering part 61 which can be protruded/retracted axially to the small-diameter reference part 60 and fitted to the small-diameter winding core 4".

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a core holding mechanism for supporting a core for winding a film-shaped medium made of paper, film, or cloth into a roll, and a winding device using the same. More specifically, the present invention relates to a core holding mechanism suitable for supporting a core for winding roll paper output from a large-sized printer, and a winding device using the same.

[0002]

2. Description of the Related Art As a drawing medium for a large-size full-color printer (such as an ink jet system or an electrostatic recording system), a medium in which paper, a film, or a cloth is wound into a roll around a pipe-shaped paper tube made of corrugated paper is used. Is now common. Then, as one of means for storing the medium after printing, as shown in FIG. 26 and FIG.
02 and wound up in a roll 100
There is a method of storing.

Here, the medium 100 is connected to a printer 104.
In a device (not shown) or a winding device 101 for supplying the inside of the roll, the roll-shaped medium 100 is
3, the paper tube 102 is held between both ends. The paper tube 1 attached to the winding device 101
As 02, for example, the paper tube 102 after the medium 100 used on the supply side is used up is used.

[0004] As the paper tube 102, the medium 1
Two types having an inner diameter of 2 inches and 3 inches are usually used depending on the strength of the waist and the winding habit of 00. For this reason, two types of paper tubes 102 can be
In some cases, a 2-inch holding member and a 3-inch holding member are detachably attached to each other so as to be replaceable. Alternatively, as shown in FIG. 28, a holding portion 105 for 2 inches is formed on one side of the core holding member 103, and 3
An arrangement in which an inch holding portion 106 is formed is known.

Since the paper tube 102 is made of corrugated cardboard,
The inner diameter of the paper tube 102 varies by about 2.5 mm. For example, for a φ2 inch paper tube, φ50 mm to φ
Variations occur in the range of about 52.5 mm. For this reason, as shown in FIG. 29, the holding portion 103a of the core holding member 103 is formed in a conical shape so that the paper tube 102 has a tapered surface so that the core can be extended and held even if the inner diameter of the paper tube 102 varies. Some are designed to be retained.

[0006]

However, in order to mount the paper tubes 102 having different thicknesses as described above, the core holding member 103 for changing parts as shown in FIG.
The attachment and detachment of parts are complicated and workability is poor. In addition, there is a possibility that the cap, the metal fitting, and the like may be lost during the attachment and detachment. Moreover, paper tube 1
Core holding member 1 using different parts for each thickness of 02
In 03, while one component is in use, the other unused component needs to be managed and may be lost.

Further, in the core holding member 103 which receives the variation of the inner diameter of the paper tube 102 on the tapered surface of the holding portion 103a as shown in FIG. 29, the position received on the tapered surface depends on the inner diameter of the paper tube 102. As a result, the core comes out, but the position of the end face 102a of the paper tube 102 in the width direction W is not determined. For this reason, the winding position of the paper tube 102 is shifted with respect to the core of the medium 100 discharged from the printer 104. If the front end of the medium 100 is fixed to the width of the paper tube 102 and wound up, the medium 100 Meandering is easily caused, and reliable winding is difficult.
To prevent this, it is necessary to use a paper core 102 that is slightly longer than the width of the media 100. However, if the media 100 having the same width is continuously used, the paper core 102 cannot be reused. After winding, the paper tube 102 protrudes from the end surface of the roll-shaped medium 100.

Accordingly, the present invention utilizes a core holding mechanism that can hold two types of cores having different thicknesses without replacing components and that can position any of the cores at a predetermined reference position. It is an object to provide a winding device.

[0009]

In order to achieve the above object, the invention according to claim 1 is to provide at least one end of a core for winding a film-like medium made of paper, film or cloth into a roll. In the core holding mechanism to be supported, a base fixed in the axial direction of the core, a large-diameter reference portion capable of protruding and retracting in the axial direction with respect to the base and abutting on an end face of the large-diameter core, The tapered large-diameter centering part that can protrude and retract in the axial direction with respect to the reference part and fits the large-diameter core, and the end face of the small-diameter core that can protrude and retract in the axial direction with respect to the base. A small-diameter reference portion in contact with the small-diameter reference portion, and a tapered surface-shaped small-diameter centering portion that can protrude and retract in the axial direction and fit to the small-diameter core, and have a large diameter when holding a large-diameter core. The core is centered while the centering part is immersed in the large diameter reference part, and the large diameter reference part is immersed in the base and the end face is While holding the small-diameter core while holding the small-diameter core, the core is centered while the small-diameter centering part is immersed in the small-diameter reference part, and the small-diameter reference part and the large-diameter reference part are held. In addition, the large-diameter centering portion is immersed in the base so that the end face is positioned at the reference position.

Therefore, the large-diameter winding core is centered by the large-diameter centering portion and is adjusted to the reference position by the large-diameter reference portion. The small-diameter winding core is centered by the small-diameter centering portion and is adjusted to the reference position by the small-diameter reference portion. For this reason, since both large diameter and small diameter cores can be received, two types of cores can be supported without replacing parts. For this reason, workability can be improved and the complexity of component management can be reduced.

In addition, since the reference position of the core can be fixed irrespective of the thickness of the mounted core, the position of the medium ejected from the printer and the winding when used in a printer or a winding device can be determined. The position of the core to be performed can be easily adjusted, and meandering of the medium can be prevented.

In addition, since the core is received at the end face at each reference portion and the core is set at the tapered surface at each centering portion,
Even if the inner diameter of the core varies, the core end face can be reliably set at the reference position after the center of the rotation center is extended.

According to a second aspect of the present invention, there is provided a winding device for winding a film-shaped medium made of paper, film, or cloth discharged from a printer around a core, comprising a core holding mechanism according to the first aspect. Thus, the core is held by the core holding mechanism.

Therefore, the reference position of the take-up side can be easily adjusted with respect to the reference end of the medium supplied from the printer, so that the medium can be prevented from meandering.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described below in detail based on an example of an embodiment shown in the drawings. 1 to 25 show an embodiment of a printer 2 equipped with a winding device 1 having the core holding mechanisms 8 and 32 of the present invention. The printer 2 here is, for example, a large-sized full-color printer 2 such as an ink-jet type or an electrostatic recording type, and its drawing medium 3 is, for example, a roll paper wound around a corrugated cardboard pipe tube as a core 4. I'm using

At least one of the core holding mechanisms 8 and 32 for holding the core 4 from the left and right includes a base 57 fixed in the axial direction of the core 4 as shown in FIGS. A large-diameter reference portion 58 that can axially protrude and abut the end face 4a of the large-diameter core 4 ′, and a large-diameter core 4 ′ that can protrude and emerge in the axial direction with respect to the large-diameter reference portion 58. And a small-diameter reference portion 6 which is axially protrudable and retractable from the base 57 and abuts against the end surface 4b of the small-diameter winding core 4 ".
0, and a tapered surface-shaped small-diameter centering portion 61 that can protrude and retract in the axial direction with respect to the small-diameter reference portion 60 and is fitted to the small-diameter winding core 4 ″.

When holding the large-diameter core 4 ′, the large-diameter centering portion 59 centers the core 4 while immersing in the large-diameter reference portion 58, and the large-diameter reference portion 58 Stand 5
7 so that the end face 4 a of the large diameter core 4 ′ is positioned at a predetermined reference position 62 with respect to the base 57. On the other hand, when holding the small-diameter winding core 4 ″, the small-diameter centering portion 61 centers the winding core 4 while immersing in the small-diameter reference portion 60, and the small-diameter reference portion 60, the large-diameter reference portion 58, and the large The diameter centering portion 59 is immersed in the base 57 and regulates the end surface 4b of the small-diameter winding core 4 "to be located at the reference position 62.

For this reason, for example, both a large diameter core 4 'having an inner diameter of 3 inches and a small diameter core 4 "having an inner diameter of 2 inches can be received, so that two types of cores 4 can be received without replacing parts. ', 4 "can be supported. As a result, workability can be improved, and the complexity of component management can be reduced. In addition, since the reference position 62 of the core 4 can be fixed regardless of the thickness of the core 4 attached, the reference position of the medium 3 discharged from the printer 2 when used in the printer 2 or the take-up device 1 is used. The end 31 and the reference position 62 of the winding core 4 for winding can be easily aligned, and meandering of the medium 3 due to the deviation between the reference end 31 and the reference position 62 can be prevented. Moreover, each reference part 5
8 and 60, the core 4 is received on the end surfaces 4a and 4b, and the centering portions 59 and 61 are centered by tapered surfaces. Then, the end surfaces 4a and 4b of the core 4 can be reliably set at the reference position.

In the printer 2 of the present embodiment, the right side edge 31 of the output medium 3 in FIG. For this reason, the leading end of the core 4 held by the core holding mechanism 8 (hereinafter, referred to as a fixed-side core holding mechanism) on the right side of the winding device 1 is aligned with the reference end 31. Further, a core holding mechanism (hereinafter referred to as a sliding core holding mechanism) 32 on the left side in FIG. 6 is slidably supported by a roll-shaped media holding device 33. Thus, when the core 4 is attached or detached, the sliding side core holding mechanism 32 is slid.

In this embodiment, the left and right core holding mechanisms 8,
32 has the same structure except that the gear portion 15 is formed only in the core holding mechanism 8 and the bearing 65 and the washer 64 are used only in the core holding mechanism 32. For this reason, most of the components of the left and right core holding mechanisms 8 and 32 can be shared, so that component costs can be reduced. In the present embodiment, the reference position 62 can be set by the left and right core holding mechanisms 8 and 32. However, the present invention is not limited to this. 31. In this case, the sliding-side core holding mechanism 32 is, for example, shown in FIG.
Since it is possible to have a simple tapered centering portion as shown in FIG. 9, the sliding-side core holding mechanism 32 can be simplified.

The core holding mechanisms 8 and 32 of the present embodiment have a flange shaft 63 fixed to the support stay 42 or the spooler support plate 12. On the flange shaft 63, a washer 64, a bearing 65, a base 57, a large-diameter reference portion 58, a large spring 66, a small spring 67, a large-diameter centering portion 59, a small-diameter reference portion 60, and a small-diameter centering portion 61 are sequentially arranged. The small-diameter centering portion 61 is prevented from coming off by the E-ring 68 and is assembled. Members other than the washer 64 and the inner ring of the bearing 65 rotate integrally with the held core 4. In addition, since the bearings 65 are used in the core holding mechanisms 8 and 32, the rotating load of the core 4 and the rotating member can be reduced to prevent the held core 4 from spinning.

The base 57 is provided with a flange 69 for protecting a side edge of the medium 3. The base 57 is
It has a projection climbing portion 70, an axially parallel relief groove 71 formed on the side of the projection climbing portion 70, a concave portion 72, and a guide groove 73 parallel to the axial direction. The large-diameter reference portion 58 includes a protrusion 74 that abuts on the protrusion riding portion 70 of the base 57 or is guided by the escape groove 71,
And a cam groove 76 which is hooked on the concave portion 72 of the helical member. For this reason, the large-diameter reference portion 58 can slide with respect to the base 57, but the large-diameter reference portion 5
8 is caught on the base 57 by being hooked. Further, the amount of sliding in the direction in which the large diameter reference portion 58 enters the base 57 differs depending on the rotation angle of the large diameter reference portion 58 with respect to the base 57. That is, the large diameter reference portion 5
When the projection 74 of FIG. 8 comes into contact with the projection climbing portion 70 of the base 57, it cannot enter any further. In addition, the large diameter reference portion 58 rotates, and the protrusion 74 becomes the escape groove 71 of the base 57.
When you are guided to, you can go inside.

Here, as shown in FIG. 3, the formation position of the projection riding portion 70 and the projection 74 is such that when the large diameter core 4 'is brought into contact with the large diameter reference portion 58 and pushed in, the core 4' is pressed. Is a predetermined distance (for example, 7
mm) Set apart. Thus, the flange 6
Since the core 9 and the core 4 ′ can be located at a predetermined distance, the end face 4 a of the core 4 ′ can be located at the reference position 62. In addition, since the flange 69 and the core 4 ′ are located apart from each other, the medium 3 reference end 31 on the supply side is provided.
And the amount of displacement between the take-up side reference position 62 and the medium 3 when the medium 3 absorbs moisture during drawing and the width of the medium 3 becomes large. Escape in the case where there is a difference between the core length and the winding core length on the take-up side, and escape in the case where there is a difference between the length of the supply-side core and the media 3 can be ensured. As a result, it is possible to take measures against factors that hinder winding.
In the present embodiment, the distance between the flange 69 and the core 4 ′ is 7 m.
Although m is used, it is a matter of course that the present invention is not limited to this.

The small diameter reference portion 60 is formed integrally with the large diameter centering portion 59. The small diameter reference portion 60 includes a cam protrusion 77 guided by the cam groove 76 of the large diameter reference portion 58, a slide protrusion 78 guided by the guide groove 73 of the base 57, and a guide groove 79 parallel to the axial direction. And a hole 80. Therefore, the small diameter reference portion 60 is rotated by the cam mechanisms 76 and 77 while sliding with respect to the large diameter reference portion 58. further,
The slide projection 78 of the small diameter reference portion 60 is engaged with and guided by the guide groove 73 of the base 57, so that the small diameter reference portion 6 is formed.
Numeral 0 is movable with respect to the base 57 in the axial direction, is restricted in the rotational direction, and rotates integrally.

Here, as shown in FIG. 4, the shape of the cam groove 76 and the position of the cam projection 77 are determined when the small diameter core 4 "is brought into contact with the small diameter reference portion 60 and pushed in.
Guides the cam groove 76 in the rotation direction to rotate the large-diameter reference portion 58 so that the projection 74 of the large-diameter reference portion 58
It is set to deviate from 0 and enter the escape groove 71. Then, the bottom portion 81 of the large-diameter reference portion 58 is pushed in by the large-diameter centering portion 59, and the large-diameter reference portion 58 and the large-diameter centering portion 59 are immersed in the base 57 and retracted from around the winding core 4 ″. At the same time, the reference position 62 is set such that the bottom portion 82 of the small diameter reference portion 60 contacts the bottom portion 83 of the base 57 and the end surface 4b of the core 4 "is separated from the inner surface of the flange 69 by a predetermined distance (for example, 7 mm). . Also in this case, as in the case of supporting the large-diameter winding core 4 ′, it is possible to take measures against factors that hinder winding. In the present embodiment, the distance between the flange 69 and the core 4 "is set to 7 mm, but it is needless to say that the distance is not limited to 7 mm.

The small-diameter centering portion 61 has a slide projection 84 guided by the guide groove 79 of the small-diameter reference portion 60 and a claw 85 that is hooked on an edge of the engaging hole 80 of the small-diameter reference portion 60. Therefore, the slide projection 84 of the small-diameter centering portion 61
Is guided by engaging with the guide groove 79 of the small diameter reference portion 60, the small diameter centering portion 61 is movable in the axial direction with respect to the small diameter reference portion 60, is restricted in the rotation direction, and rotates integrally. . Further, the claw 85 of the small diameter centering portion 61 enters the engaging hole 80 of the small diameter reference portion 60 and is caught, so that the small diameter centering portion 61 and the small diameter reference portion 60 are prevented from coming off.

The large spring 66 is installed by being compressed so as to push the base 57 and the small diameter reference portion 60 apart.
The small spring 67 is compressed and installed so as to push and expand the base 57 and the small-diameter centering portion 61.

The core holding mechanism 8 allows the large-diameter core 4 ′
3, the end of the core 4 'abuts against the large-diameter centering portion 59 as shown in FIG.
The end face 4a abuts against the large-diameter reference portion 58 while being pushed in. Then, the protrusion 74 of the large diameter reference portion 58 is
7, the end surface 4 a of the core 4 ′ is set at the reference position 62. When the corner of the inner diameter surface of the winding core 4 ′ pushes the large-diameter centering portion 59, centering is performed on the tapered surface. In addition, since the large spring 66 receives the spring force, it is possible to obtain sufficient rotational friction resistance for the rotational torque required for winding. Further, in order to increase the rotational friction resistance for holding the core 4, a large number of narrow grooves along the axial direction may be formed in the outer peripheral surface of the large-diameter centering portion 59.

When the small diameter core 4 "is held by the core holding mechanism 8, the end of the core 4" abuts on the small diameter centering portion 61 as shown in FIG. The end face 4b is pressed against the small spring 67 so that the small diameter reference portion 6
Hits 0. When the small diameter reference portion 60 is further pushed in against the large spring 66, the cam projection 77 of the small diameter reference portion 60 comes into contact with the cam groove 76 of the large diameter reference portion 58 to rotate the large diameter reference portion 58 by the amount of cam groove inclination. The rotation of the large-diameter reference portion 58 causes the protrusion 74 of the large-diameter reference portion 58 to move to the base 5.
7, and can be moved to the back side along the escape groove 71. When the core 4 ″ is further pushed in, the bottom 82 of the small-diameter reference portion 60 is
, The pushing of the core 4 ″ is restricted.

Further, when the winding core 4 ″ is pushed in, the corners of the inner diameter surface of the winding core 4 ″ come into contact with the tapered surface of the small-diameter centering portion 61 to be centered. In addition, since the core 4 "receives the spring force of the two springs 66 and 67, it is possible to obtain sufficient rotational friction resistance for the rotational torque required for winding. As shown in FIG. 2, a large number of narrow grooves along the axial direction may be formed on the outer peripheral surface of the small-diameter centering portion 61 in order to increase the diameter.

Then, by removing the core 4 ″ and releasing the pressure, the small-diameter centering portion 61 and the small-diameter reference portion 60 are returned to the original positions shown in FIG. 1 by the spring forces of both springs 66 and 67. While the small diameter reference portion 60 is being pushed back, the cam projection 77 of the small diameter reference portion 60 pushes up the slope of the cam groove 76 of the large diameter reference portion 58. Then, the large diameter reference portion 5
When the bottom surface of the projection 74 of FIG. 8 becomes the same height as the projection riding portion 70, the cam projection 77 rotates the large diameter reference portion 58 using the cam groove 76. Thus, the return to the normal state is completed.

Here, the winding device 1 having the core holding mechanisms 8 and 32 will be described. As shown in FIGS. 5 to 7, the winding device 1 includes a winding mechanism 5 that winds the medium 3 discharged from the printer 2 around a core 4.
It has a slack detection sensor 6 which can detect slack of the medium 3 and activates the winding mechanism 5 by this detection. Further, the looseness detection sensor 6 is configured to be able to retreat from the moving area of the medium 3 when the paper discharge tray 7 is mounted on the printer 2. This prevents the medium 3 from interfering with the slack detection sensor 6 when the paper discharge tray 7 is mounted on the printer 2 in order to stock the cut medium 3, so that when the paper discharge tray 7 is attached or detached, the medium 3 is taken up. The attachment or detachment of the device 1 or a part thereof can be made unnecessary.

As the winding core 4, for example, a cardboard-made paper tube around which the medium 3 before printing is wound is used. The winding core 4 is not limited to such a paper tube, and it is a matter of course that a dedicated tube may be used.

In this embodiment, as shown in FIGS. 8 to 12, the looseness detecting sensor 6 is attached to the winding mechanism 5 by a sensor arm set 10. The winding mechanism 5 includes a pair of core holding mechanisms 8 and 3 that support the core 4 with both ends sandwiched therebetween.
A motor mechanism 9 for rotating at least one of the core holding mechanisms 8, 32 (here, for example, the core holding mechanism 8 on the right side in FIG. 6) in response to the detection of the slack of the medium 3 by the slack detection sensor 6, The printer includes a spooler support plate 12 and a spooler reinforcing plate 13 that support the core holding mechanism 8 and the motor mechanism 9 and the sensor arm set 10 to be fixed to the stay 11 of the printer 2.

The motor mechanism 9 has a built-in reduction gear train. A gear portion 15 is provided on the outer periphery of the boss portion 14 of the core holding mechanism 8.
Are formed. And the pinion 1 of the motor mechanism 9
The gear 6 and the gear 15 of the core holding mechanism 8 are engaged with each other. Note that reference numeral 17 in FIGS. 8 and 10 denotes a cover.

The sensor arm set 10 includes the slack detection sensor 6
Arm 18 for swingably supporting the sensor arm 18 and an arm rotating shaft 19 for rotatably supporting the sensor arm 18 with respect to the winding mechanism 5 and rotating integrally with the sensor arm 18.
A friction plate 20 integrated with the sensor arm 18 and the arm rotation shaft 19;
5 and a biasing spring 22 composed of a compression coil spring that presses the clutch gear 21 against the friction plate 20, and a side of the biasing spring 22 opposite to the clutch gear 21. Spring receiving plate 23 to support
And

The arm rotation shaft 19 penetrates a U-shaped support portion 24 formed at the upper end of the sensor arm 18 and is fixed at both ends by E-rings 25. Arm rotation shaft 19
Is inserted into the support portion 24 of the sensor arm 18, the friction plate 20, the clutch gear 21, the biasing spring 22, the spring receiving plate 23, and the polyslider 26 are sequentially assembled inside the support portion 24. Here, the biasing spring 22 is incorporated while being compressed. Then, since the clutch gear 21 is pushed by the urging spring 22, the clutch gear 21 is urged by the friction plate 20. Also,
The arm rotation shaft 19 and the friction plate 20
Are prevented from rotating by D-cut fitting or the like, and rotate integrally. In the present embodiment, the arm rotation shaft 19 is formed in a tubular shape. The cord 27 from the slack detection sensor 6 passes through the inside of the arm rotation shaft 19.

Further, one end of the arm rotation shaft 19 protruding from the sensor arm set 10 is rotatably fitted to a hole of the spooler support plate 12 via a polyslider 26. Further, the other end of the arm rotating shaft 19 protruding from the sensor arm set 10 is rotatably fitted to a hole of the spooler reinforcing plate 13 via a poly slider 26.
Then, the sensor arm set 10 is sandwiched by screwing and fixing the spooler reinforcing plate 13 to the spooler support plate 12.

The sensor arm set 10 includes an arm rotation shaft 19
Can be rotated with respect to the spooler reinforcing plate 13 and the spooler support plate 12. At this time, the arm rotation shaft 19, the sensor arm 18, and the friction plate 20 rotate integrally within a regulation range described later.

Then, the slack detection sensor 6 detects the medium 3
The sensor is a mechanical contact-type sensor that performs detection by contact with the winding mechanism 5 and is integrated with the winding mechanism 5. For this reason, since the contact sensor is used, the detection accuracy is prevented from deteriorating due to the interruption of the optical axis due to dirt and the like and the displacement of the optical axis after mounting, as in the case of the optical sensor, and the reliability of detection is improved. Can be improved. Further, since the slack detection sensor 6 is integrated with the winding mechanism 5, there is no need to wire the sensor and the winding mechanism 5 as in the case where the optical sensor is attached to the printer 2. It can be facilitated.

The looseness detecting sensor 6 includes a contact lever 28 swingably attached to a lower portion of the sensor arm 18 and a photo sensor 29 for detecting the swing of the contact lever 28. Then, the contact lever 28 swings due to the contact of the medium 3, and the swing is detected by the photo sensor 29. Here, the contact lever 28 is configured to be able to swing with a small force. That is, the contact lever 28 is normally in a raised state (indicated by a solid line in FIG. 8), and can be swung down by a small load (indicated by a two-dot chain line in FIG. 8). It is balanced in weight. Therefore, it is possible to prevent the medium 3 from being bent or damaged when the medium 3 comes into contact with the contact lever 28. The contact portion of the contact lever 28 with the medium 3 may be formed by an arc shape as shown in FIGS. 8 and 9 to reduce the contact resistance, or by attaching a rotatable roller 30 as shown in FIG. The contact resistance can be further reduced.

The roll-shaped media holding device 33 is shown in FIG.
19, a slider portion 34 fixed to the core holding mechanism 32, and a guide portion 35 slidably supporting the slider portion 34 along the width direction W of the medium 3. Further, the roll-shaped media holding device 33
Has locking means 36 that locks the sliding of the slider portion 34 in the direction away from the core 4, and releasing means 37 that can release the lock by the locking means 36. For this reason, when attaching the core 4, the slider part 34 is pushed toward the core 4 and slid. In this case, the sliding can be easily performed without the lock means 36 acting. When the core holding mechanism 32 contacts the core 4 and holds the core 4, the pressing of the slider portion 34 is stopped. At this time, since the slider portion 34 does not move in the direction away from the core 4 by the action of the lock means 36, the holding state of the core 4 is maintained. Thereby, the core 4 can be attached by a one-touch operation. When the core 4 is to be removed, the release means 37 is operated to slide the slider portion 34 and the core holding mechanism 32. Thus, the core 4 can be removed by an easy operation close to a one-touch operation.

The guide section 35 comprises a guide rail provided from the left end to the vicinity of the right end of the winding device 1 along the stay 11 provided in the width direction W of the printer 2. The guide portion 35 is a channel component having a U-shaped cross section, and is disposed vertically so that the open sides of the U-shape face each other. As shown in FIG. 16, each guide portion 35 is
1 and is positioned against the positioning projection 38 formed to be arranged in the horizontal direction. After the respective guide portions 35 are positioned in this manner, they are fastened and fixed to the stay 11 by a guide rail fixing plate 39. In the present embodiment, fastening and fixing are performed by screwing.

The slider section 34 includes a slide plate 40
And a slide block 41 attached to the four corners of the slide plate 40, and a support stay 42 for a user to perform a sliding operation. As shown in FIG. 18 and the like, the sliding blocks 41 are fitted in the four corners of the slide plate 40 in a fitted state, and contact the front side F and the rear side R with the inner surface of the guide portion 35. A projection 43 is formed. For this reason, the guide portion 35 and the sliding block 41
The contact area can be minimized to reduce the sliding resistance. Further, the contact protrusion 43 is not formed on one of the four sliding blocks 41. As a result, the guide portion 3 may be displaced due to a dimensional error or an assembly error.
Even if distortion occurs in 5 and the like, the slider portion 34 can be easily slid.

The locking means 36 forms a wedge-shaped opposing surface 44 formed between the slider portion 34 and the guide portion 35, and moves between the opposing surface 44 to spread the slider portion 34 and the guide portion 35. A stopper member 45 for fixing the relative movement. For this reason, since the lock means 36 can be formed by a simple mechanism, the cost of the roll-shaped media holding device 33 can be reduced. In the present embodiment, as shown in FIGS. 20 and 21, the facing surface 44 includes an inclined surface 46 formed in a portion located inside the guide portion 35 of the slide plate 40, and an inner surface 47 of the guide portion 35 facing the inclined surface 46. It consists of.

The stopper member 45 is made of, for example, a metal cylindrical roller. Further, between the sliding block 41 and the stopper member 45, an urging spring 48 composed of a compression coil spring for urging the stopper member 45 to be pushed into the facing surface 44 is provided. Biasing spring 4
8 is supported by a spring support projection 49 formed on the sliding block 41.

When the core 4 is mounted, the slider 34
Is pushed toward the core 4, the stopper member 45 escapes from between the opposing surfaces 44, so that the slide plate 40 can be easily slid without being locked. Then, when the sliding-side core holding mechanism 32 contacts the core 4 and holds the core 4, the pressing on the slider portion 34 is stopped. Here, the biasing spring 48
Pushes the stopper member 45 between the opposing surfaces 44, so that the user can release his hand as shown in FIG.
Even if is pushed in the direction away from the core 4, the stopper member 45 enters and bites between the opposing surfaces 44, and the slide plate 40 is locked to the guide portion 35. Therefore, the state where both ends of the core 4 are held between the left and right core holding mechanisms 8 can be maintained.

The release means 37 has an operation lever 50 and a release lever 51 which are swingably mounted on the support stay 42 as shown in FIG. The operation lever 50 is supported by the rotating shaft 52 at the slide plate 40 side of the support stay 42, that is, at the rear side R, and has an operation portion 53 protruding toward the front side F. The release lever 51 is supported by the rotation shaft 54 at the center of the support stay 42 and has a pressing portion 55 that presses the stopper member 45 in a direction to remove the stopper member 45 from between the opposing surfaces 44 by swinging. The operation lever 50 is provided with a lever pushing projection 56 that swings the release lever 51 by rotation. Therefore, as shown in FIG.
When the operating portion 53 is pushed in the direction of the arrow, the operating lever 50 swings, the lever pushing projection 56 swings the release lever 51, and the pressing portion 55 causes the stopper member 45 to move the stopper member 45 on the facing surface 44 as shown in FIG. Then, the slider 34 is released from the locked state.

In this embodiment, when the operation lever 50 is operated in the retracting direction of the slider portion 34 (the direction of the arrow in FIG. 15), the release lever 51 causes the stopper member 45 to move the stopper member 45 to the facing surface 44.
I try to remove it from between. That is, the release means 37
Is made to coincide with the direction in which the guide portion 35 is retracted. Therefore, the operation of the release means 37 and the slider 3
Since the evacuation operation 4 can be performed as if by a one-touch operation, the operability can be improved.

On the other hand, as shown in FIG. 22, the winding device 1 is provided with a winding core 4 for holding the medium 3 being wound and performing tight winding while preventing the medium 3 from being wound obliquely. Roller units 86 are provided in the vicinity of both ends. Each roller unit 86
A first roller 87 that contacts and provides resistance to the medium 3 when the medium 3 is being wound on the core 4, and a single roller 87 when the medium 3 runs obliquely and rides on the core holding mechanisms 8, 32. Alternatively, a second roller 88 is provided which contacts the medium 3 together with the first roller 87 and gives a resistance larger than that of the first roller 87 alone. Therefore, FIG.
23, when the medium 3 is wound straight, the resistance is received only by the first roller 87 in each roller unit 86 as shown in FIG. You will receive resistance. Therefore, the medium 3 can be wound while being pressed lightly, so that the tightly wound medium 3 can be wound even if the medium 3 is strong.

Also, as shown by the two-dot chain line in FIG. 22, when the medium 3 moves obliquely and one side edge rides on the core holding mechanism (here, the sliding-side core holding mechanism 32, for example), As shown in FIG. 24, the second roller 88 alone or the first roller 87 and the second roller 88 receive resistance at the roller unit 86 closer to the winding core holding mechanism 32 that has climbed. On the other hand, in the roller unit 86 on the opposite side, since the medium 3 does not expand, the resistance is received only by the first roller 87. For this reason, the winding is continued with the medium 3 receiving a large resistance on the expanded side and a small resistance on the non-expanded side, so that the medium 3 can be turned in the direction opposite to the oblique direction. Thereby, the skew can be reversed, and the skew of the medium 3 can be reduced.

Each roller unit 86 includes a first roller 87
In addition to the and the second roller 88, a bracket 90 is attached to the stay 11 so as to be swingable in the vertical direction by a hinge 89, and supports the first roller 87 and the second roller 88. The bracket 90 can switch between a state in which at least one of the rollers 87 and 88 contacts the medium 3 and a state in which at least one of the rollers 87 and 88 does not contact the medium 3 by flipping up.

As shown in FIG. 25, each of the rollers 87 and 88 has a support shaft 91 fixed to a bracket 90 in a non-rotatable state and parallel to the width direction W, and a rubber roller 92 attached to each support shaft 91 in order. It includes a torque limiter 93, a one-way clutch spring 94, and a spacer 95. The torque limiter 93 here is, for example, of a double cylindrical shape inside and outside, in which the outer portion is rotatable with respect to the inner portion in one direction with a certain resistance and is not rotatable in the opposite direction. Can be used. The outer portion of the torque limiter 93 is engaged with the rubber roller 92 and integrally rotates.

The one-way clutch spring 94 is provided between the inside of the torque limiter 93 and the support shaft 91. And the one-way clutch spring 94
When it rotates in the winding direction (indicated by the arrow in FIG. 25), it winds up and is integrated with the support shaft 91. Thereby, when the rubber roller 92 is in rolling contact with the medium 3 and rotates in the winding direction, the rubber roller 92
While the outer portion of the torque limiter 93 rotates, the inner portion of the torque limiter 93 is fixed to the support shaft 91 by the one-way clutch spring 94 and does not rotate. Therefore, a braking force is applied by the torque limiter 93. The braking force depends on the torque value of the torque limiter 93 used.

When the rubber roller 92 rotates in the opposite direction to the winding direction when the wound-up medium 3 is pulled out or the like, the outer and inner portions of the torque limiter 93 are integrally rotated. Since the spring 94 is in the expanding direction, the spring 94 rotates with respect to the support shaft 91. As a result, the rubber roller 92, the torque limiter 93, and the one-way clutch spring 94 rotate integrally with the support shaft 91. That is, no braking force is generated by the torque limiter 93.

Further, as shown in FIGS. 23 and 24,
The two rollers 87 and 88 are arranged with a step. Thus, when the medium 3 is wound without contacting the flange 69, as shown in FIG.
When only the medium 7 comes into contact with the medium 3 and the medium 3 rides on the flange 69, only the second roller 88 comes into contact with the medium 3 as shown in FIG.

The medium 3 is wound by the winding device 1 described above.
Will be described below.

When the medium 3 is wound around the core 4 without cutting, the paper discharge tray 7 is removed. Then, the core 4 is attached to the roll-shaped media holding device 33. At this time, one end of the core 4 is first attached to the fixed-side core holding mechanism 8, and the sliding-side core holding mechanism 32 is attached to the end surface 4 a of the core 4.
4b until the two core holding mechanisms 8,
The core 4 is sandwiched by 32. If the core 4 is sandwiched between the core holding mechanisms 8 and 32 in this manner, the core 4 is maintained without coming off unless the operation lever 50 is operated. In addition, the core holding mechanism 8, 32 causes the core 4
Is maintained, the reference surfaces of the end faces 4a and 4b of the core 4 are automatically adjusted regardless of the thickness of the core 4.

After the core 4 is mounted, the output from the printer 2 is started. When the leading end of the medium 3 reaches the core 4 with slack, it is attached to the core 4 with a tape. Thereafter, the output of the printer 2 is continued.

When the slack of the medium 3 is increased by discharging the medium 3 from the printer 2, the slack of the medium 3
Is detected by the slack detection sensor 6. As a result, the drive unit 9 is operated, and each of the core holding mechanisms 8 and 32 and the core 4 rotate integrally to start winding the medium 3. The output from the printer 2 continues while the medium 3 is wound up. However, since the winding speed of the medium 3 is faster, the slack amount of the medium 3 decreases, and the medium 3 is not detected by the slack detection sensor 6 soon. Thereby, the operation of the drive unit 9 is stopped, and the winding of the medium 3 is stopped.

When the medium 3 is greatly loosened, the winding is performed, and when the slack is reduced, the operation of stopping the winding is repeated, so that the medium 3 output from the printer 2 is rolled onto the winding core 4 of the winding device 1. Can be wound up. Also, at the time of winding, the first left and right rollers 87
As a result, the medium 3 is pressed, so that close winding can be realized.

Incidentally, the medium 3 being wound may be skewed as shown by a two-dot chain line in FIG. 22 because the medium 3 is slightly inclined when the tape is fastened with the tape. . As a result, the edge of the medium 3 comes into contact with the flange 69, and is moved up by the flange 69 to form a media path as shown in FIG. As the trajectory of the medium 3 expands, the second roller 88 comes into contact with the medium 3. At this time, since the medium 3 moves away from the flange 69 on the opposite side, the winding does not expand, and the first roller 87 is in contact with the medium 3.

For this reason, a difference occurs between the braking forces of the left and right roller units 86. When the state where the difference in the braking force continues continues, the right side with the weak braking force has less load on the winding than the left side with the strong braking force, so that the winding length on the right side is longer. The difference between the left and right winding lengths can reduce skew or reverse skew, thereby preventing skew.

Further, the rolled media 3
Is removed from the winding device 1, the sliding core holding mechanism 32 of the winding device 1 is retracted to the side. At this time, the slider portion 34 is easily slid while pushing the operation lever 50 in the retracting direction. Thereby, the heavy roll-shaped media 3 can be easily and safely removed.

When cutting the medium 3 output from the printer 2, the paper ejection tray 7 is attached and the slack detection sensor 6 at the slack detection position indicated by the broken line in FIGS. 8 and 5 is retracted backward. Let it.

As an operation at this time, first, the sensor arm 18 is urged toward the back with a finger or the like. As a result, the sensor arm 18 rotates and the friction plate 20 rotates. At this time, the friction plate 20 acts to rotate the clutch gear 21, but does not rotate because the clutch gear 21 is engaged with the gear portion 15 of the fixed-side core holding mechanism 8. For this reason, the friction plate 20 slips with respect to the clutch gear 21. As a result, the entire sensor arm set 10 rotates,
The slack detection sensor 6 is retracted rearward. Alternatively, the looseness detection sensor 6 can be similarly retracted backward by holding the fixed-side core holding mechanism 8 and turning it in the direction opposite to the winding direction.

Then, a part of the sensor arm 18 comes into contact with the spooler support plate 12 or the spooler reinforcing plate 13,
As shown by a two-dot chain line in FIG. 9 and FIG. Even when the sensor arm set 10 is retracted to the innermost side in this way, the friction plate 20 and the clutch gear 21 remain in that position because they have frictional resistance due to the biasing force of the biasing spring 22. Further, the clutch gear 21 is composed of the gear portion 15 of the fixed-side core holding mechanism 8 and the pinion 1 of the motor mechanism 9.
Since the sensor arm set 10 is engaged with the reduction gear train of the motor mechanism 9 via the motor 6, the sensor arm set 10 does not easily rotate with the own weight. As a result, the sensor arm set 10 is held at the stopped position by the frictional resistance with the friction plate 20.

The operation of retracting the slack detection sensor 6 backward is not limited to the manual operation as described above, and the power of the motor mechanism 9 may be used. In this case, the motor mechanism 9 is driven to rotate the fixed-side core holding mechanism 8 in a direction opposite to the winding direction. Thereby, the clutch gear 21 rotates counterclockwise in FIG. Then, the friction plate 20 receives the frictional resistance from the clutch gear 21 counterclockwise in the same direction.
The whole of the sensor arm set 10 integrated with
Evacuate backward. In this case, it is needless to say that the evacuation state can be maintained.

On the other hand, when the cutting of the output medium 3 is stopped and the winding is performed by the winding device 1, the paper discharge tray 7 is removed and the slack detection sensor 6 is removed.
To the slack detection position ahead.

As the operation at this time, first, the winding core 4 is set on the winding mechanism 5. The leading end of the medium 3 output from the printer 2 is attached and fixed to the core 4 with a tape.
By manually or by turning on a fast-forward switch, the core holding mechanism 8 is rotated in the winding direction, and the medium 3 is wound around the core 4 by one or more turns. By this rotation operation, the media 3
Preparation for the winding operation is completed. That is, by rotating the fixed-side core holding mechanism 8, the clutch gear 21 engaged with the gear portion 15 of the core holding mechanism 8 rotates clockwise in FIG. 9. Then, the friction plate 20 receives the frictional resistance from the clutch gear 21 clockwise in the same direction, and the entire sensor arm set 10 integrated with the friction plate 20 rotates to return to the slack detection position on the near side. Also, the sensor arm 18
Is part of the spooler support plate 12 or the spooler reinforcement plate 1
3 and is positioned at the slack detection position. Therefore, since the slack detection sensor 6 automatically returns with the winding operation of the medium 3, forgetting to return the slack detection sensor 6 can be prevented.

Further, when the winding by the core holding mechanism 8 is started, the clutch gear 21 is always rotated by the gear portion 15 of the fixed-side core holding mechanism 8. Keep slipping between. For this reason,
The sensor arm set 10 does not move from the slack detection position.

The above embodiment is an example of a preferred embodiment of the present invention, but the present invention is not limited thereto, and various modifications can be made without departing from the gist of the present invention. For example, in the present embodiment, the winding core holding mechanisms 8 and 32 are provided in the winding device 1. However, the present invention is not limited to this. The winding core holding mechanisms 8 and 32 are provided in the media supply unit of the printer 2 so as to hold the rolled media 3 before printing. Is also good. Also in this case, the workability when replacing the core 4 with a different thickness can be improved, and the reference position of the output medium 3 can be easily adjusted.

[0073]

As is apparent from the above description, according to the core holding mechanism according to the first aspect, the large-diameter core and the small-diameter core can be supported without replacing the parts, so that the workability is improved. And at the same time, the complexity of component management can be eliminated. In addition, loading can be easily performed without being aware of the size of the core.

Further, since the reference position of the core can be fixed regardless of the thickness of the mounted core, the position of the medium ejected from the printer and the winding when used in a printer or a winding device can be determined. The position of the core to be performed can be easily adjusted, and meandering of the medium can be prevented.
In addition, a core having the same width as the output medium can be used.

Further, in each reference portion, the core is received on the end face, and in each centering portion, the center is provided on the tapered surface.
Even if the inner diameter of the core varies, the core end face can be reliably set at the reference position after the center of the rotation center is extended.

Further, since a dedicated core is not required, the cost of the core can be eliminated and the management of the core is also unnecessary.

According to the winding device of the second aspect, the reference position of the winding side can be easily adjusted to the reference end of the medium supplied from the printer, thereby preventing the medium from meandering. be able to.

[Brief description of the drawings]

FIG. 1 is a plan view of a center cross section showing a core holding mechanism of the present invention.

FIG. 2 is an exploded view showing a core holding mechanism.

FIG. 3 is a cross-sectional plan view showing a state in which a core holding mechanism holds a large-diameter core.

FIG. 4 is a cross-sectional plan view at the center showing a state where the core holding mechanism holds a small-diameter core;

FIG. 5 is a side view showing the whole of a printer equipped with the winding device of the present invention.

FIG. 6 is a front view showing the entire printer on which the winding device is mounted.

FIG. 7 is a plan view showing the winding device.

FIG. 8 is a side view showing the winding device when the slack detection sensor is at a slack detection position.

FIG. 9 is a side view showing the winding device when the slack detection sensor is at a retracted position.

FIG. 10 is a front view showing the winding device when the slack detection sensor is at a slack detection position.

FIG. 11 is a plan view showing the winding device when the slack detection sensor is at a slack detection position.

FIG. 12 is a plan view showing a main part of a sensor arm set.

FIG. 13 is a side view showing another embodiment of the contact lever.

FIG. 14 is a plan view showing a roll-shaped media holding device.

FIG. 15 is a plan view showing a main part of the roll-shaped media holding device.

FIG. 16 is a side view showing a guide unit.

FIG. 17 is a perspective view showing a main part of the roll-shaped media holding device.

FIG. 18 is a perspective view showing a lock unit.

FIG. 19 is an exploded view showing the release means.

FIG. 20 is a plan view showing a state where the locking means is operating.

FIG. 21 is a plan view showing a state where a lock unit is released.

FIG. 22 is a plan view showing a skewed medium.

FIG. 23 is a side view showing a state where the medium is normally wound.

FIG. 24 is a side view showing a state in which the medium runs obliquely and rides on the flange.

FIG. 25 is a plan view showing a roller unit.

FIG. 26 is a side view showing a conventional winding device.

FIG. 27 is a front view showing a conventional winding device.

FIG. 28 is a side view showing a conventional core holding member.

FIG. 29 is a side view showing another conventional core holding member.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Winding device 2 Printer 3 Media 4 Core 4a End face of large diameter core 4b End face of small diameter core 8 Fixed core holding mechanism 32 Sliding core holding mechanism 57 Base 58 Large diameter reference part 59 Large diameter centering part 60 Small diameter reference part 61 Small diameter centering part

Continued on the front page (72) Inventor Noboru Ueno 10801, Hara-mura, Suwa-gun, Nagano 2 In the Suwa Minami Plant of Sankyo Seiki Seisakusho (72) Inventor Kiyotsugu Takazawa 10801, Hara-mura, Suwa-gun, Nagano 2 Stocks 3F055 AA01 AA05 AA12 CA01 DA04 3F058 AA02 AA03 AB01 CA03 CA12 DA04 DB05

Claims (2)

[Claims] 1. A core holding mechanism for supporting at least one end of a core for winding a film-shaped medium made of paper, film or cloth into a roll, a base fixed in the axial direction of the core. A base, a large-diameter reference portion capable of protruding and retracting in the axial direction with respect to the base, and abutting on an end surface of the large-diameter core; and a large-diameter protruding and retractable in the axial direction with respect to the large-diameter reference portion. A tapered surface-shaped large-diameter centering portion to be fitted to the core, a small-diameter reference portion capable of protruding and retracting in the axial direction with respect to the base and abutting against an end surface of the small-diameter core; And a tapered surface-shaped small-diameter centering portion that can be protruded and retracted in the axial direction with respect to the portion and that is fitted to the small-diameter winding core. When the large-diameter core is held, the large-diameter centering portion is The core is centered while being immersed in the large-diameter reference portion, and the large-diameter reference portion is immersed in the base. While the end face is regulated so as to be located at a predetermined reference position with respect to the base, while holding the small-diameter core, the small-diameter centering portion is immersed in the small-diameter reference portion while the core of the core is held down. Core holding, wherein the small-diameter reference portion, the large-diameter reference portion and the large-diameter centering portion are immersed in the base and the end surface is positioned at the reference position. mechanism. 2. A winding device for winding a paper, film or cloth film-like medium discharged from a printer onto a core, comprising: a core holding mechanism according to claim 1; A winding device for holding the winding core.