JP3139779B2 - Cover winding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cover winding device, and more particularly to a winding device capable of winding a light-shielding sheet-like cover covering an opening of a magazine containing a photosensitive film on a winding shaft and rewinding the same. .

[0002]

2. Description of the Related Art Conventionally, in a printer apparatus for forming an image by irradiating a laser beam onto a photosensitive film, a magazine containing a large number of photosensitive films is configured to be detachable from a main body of the apparatus. In this type of magazine, a disposable type magazine has a light-shielding sheet-like cover attached to a flange provided around the opening of the box-shaped magazine. When the magazine is taken out from the apparatus main body while being peeled off from the apparatus main body, the take-up shaft is reversed and the cover is rewound and the cover is again attached to the flange portion (for example, JP-A-2-216142). reference).

In this type of cover winding device, it is necessary to elastically press the winding shaft against the surface of the flange of the magazine in order to reliably wind and unwind the cover. . However, if the pressing force is constantly applied, poor engagement between the take-up shaft and the cover tip may occur, or a large force may be required when the take-up shaft rides on the flange from the home position. Unnecessary load is applied to the transmission system. Furthermore, when the winding shaft falls to the home position, there is a possibility that an impact sound is generated or mechanical damage is caused.

[0004]

Object, structure and operation of the present invention
When unnecessary, the pressing force of the winding shaft against the magazine flange is released or weakened, thereby causing poor engagement of the winding shaft with the cover tip, an increase in load on the driving system of the winding shaft, and a home position. An object of the present invention is to provide a cover winding device capable of eliminating the impact at the time of return.

In order to achieve the above object, a cover winding device according to the present invention comprises: positioning means for holding a winding shaft at a home position slightly lower than a surface of a flange portion of a magazine; And let it roll up from the home position to the surface of the collar, take up the sheet-like cover,
A drive means for returning the sheet-shaped cover by returning to the home position while reversing the winding shaft, and a pressure contact for elastically pressing the winding shaft against the flange surface when the winding shaft rides on the flange surface. Means and the winding shaft are located at the home position and between the home position and the flange end face.
A pressure releasing means for releasing or weakening the pressing force of the pressing means.

[0006] In the above construction, the winding shaft moves on the flange to take up the cover, and during the rewinding, a pressing force is applied, so that the winding and rewinding process can be performed reliably and stably. Will be On the other hand, when the take-up shaft rides from the home position to the flange end face, the press contact force is released or weakened, the engagement of the take-up shaft with the cover tip becomes reliable, and the load on the driving means is reduced. It does not increase more than necessary. Further, when the winding shaft falls from the flange end face to the home position at the time of rewinding, the pressure contact force is released or weakened, and the impact at the time of dropping is extremely small.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a cover winding device according to the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows an overall configuration of a printer device provided with a cover winding device according to the present invention. The printer 10 mainly includes an electric box 12, a film magazine 13, a film feeder 14, a film transport unit 15, an optical unit 16, a sub-scanning unit 18, and a receiving unit 12 in a main body 11 formed in a dark box state. Magazines 19 are provided as shown.

The magazine 13 is exchangeably mounted directly above the electrical equipment box 12 and houses a stack of unexposed photosensitive films 20. The upper surface of the magazine 13 is a light-shielding sheet cover 41 (see FIG. 2, see FIG. 3) to automatically form or block the opening as needed. On the magazine 13, there is provided a vacuum-type film feeding device 14 for feeding the photosensitive films 20 stored therein one by one. The feeding device 14 has a suction disk holding unit 22 having a vacuum suction disk 21 attached to the tip of an arm 23, and a support shaft 24 while the vacuum suction disk 21 maintains a horizontal posture.
As shown by the arrow, and the top film 2
0 is adsorbed and is fed between a pair of transport rollers 25 which are installed at the entrance of the film transport unit 15 so as to be able to come and go.

A transport roller pair 25 of the film transport unit 15
Is composed of a lower roller which is a driving roller and an upper roller which is a driven roller. The upper roller swings around the support shaft 28 so as to be able to contact and separate from the lower roller. The leading end of one picked-up film 20 is inserted, and then the held film 20 is fed onto the transport guide plate 29 in the pressed state. A skew correction roller pair 30 composed of an upper roller and a lower roller is provided at the center of the transport section 15. The driven upper roller swings about a support shaft 31, and a transport roller is provided. The posture of the film 20 sent by the pair 25 is corrected. Then, the film 20 that has been sent is a stopper 32 that swings around a support shaft 33.
, And the position is regulated, and the operation is temporarily stopped.

The sub-scanning unit 18 comprises a rotatable upper nip roller 35, 35 'covered with an elastic member and a sub-scanning drum 36 which is driven to rotate counterclockwise. The film 20 moves on the sub-scanning drum 36 by opening the stopper 32, and at this time, the image is exposed to light from the optical unit 16 by a laser beam that is main-scanned in the axial direction of the sub-scanning drum 36. The film 20 thus exposed is discharged into the receive magazine 19. The exposed film 20 accommodated in the receiving magazine 19 is placed in the receiving device 19 with the receiving device 19 in a light-shielded state.
It is taken out of the substrate and then developed.
A developing device may be built in the receiving magazine 19, and the exposed film 20 may be sequentially developed and discharged to the outside of the printer device 10.

On the other hand, a host device 1 is installed adjacent to the printer device 10. Image information to be printed is transmitted from the host device 1 to the printer device 10 for each image. Next, the mechanism of the magazine 13 and the cover winding unit will be described. In FIG. 2, a magazine 13 for accommodating photosensitive films in a laminated state is formed of a plastic box having a light-shielding property, and a flange portion 13a is provided in a flange shape on the upper surface. An adhesive tape (not shown) is attached to the flange 13a. A light-shielding sheet-like cover 41 is provided on the upper surface of the magazine 13, and the cover 41 is repeatedly peeled off or adhered to the flange 13 a of the magazine 13 with an adhesive tape. A protruding piece 13b is provided at the tip of the flange 13a.
And the notches 13c are formed alternately.

A frame-shaped mounting table 39 for mounting the magazine 13 has a support plate 39a at the tip.
A cushion member 50 having substantially the same projected shape as the projection 13b and the notch 13c of the flange 13a is attached on the upper side. The sheet-shaped cover 41 is provided with a flange 13 a of the magazine 13.
As shown in FIG. 3, a substantially elliptical locking hole 41a is formed at the tip end portion as shown in FIG. The locking hole 41a is formed at a position corresponding to the notch 13c of the flange 13a. On the other hand, the take-up shaft 17 of the cover 41 has a claw 17b corresponding to the locking hole 41a formed on a cut surface 17a cut in a planar shape. At the home position, the take-up shaft 17 is held in a state of being dropped into a concave portion 52 of a positioning plate 51 provided on both sides of the mounting table 39. When the winding shaft 17 rotates in the direction of the arrow w from this state, the pawl 17b is engaged with the locking hole 41a, and the cover 41 is peeled off from the flange portion 13a while being wound up from the front end portion.

The winding shaft 17 starts rotating in the direction of arrow w from the state shown in FIG. 4 and rides on the flange 13a. The state shown by the dashed line in FIG.
7B shows a state in which 7b has bitten into the locking hole 41a of the cover 41. The solid line shows a state in which the winding shaft 17 slightly winds the tip of the cover 41 and rides on the flange 13a. The magazine mounting table 39 is integrally fixed on a base 40. The base 40 can be pulled out from the apparatus main body 11 obliquely downward and rightward in FIG. 2 by opening a door (not shown) of a magazine mounting portion. Therefore, the loading of the magazine 13 into the apparatus main body 11 is performed by pulling out the base 40.

Next, a cover take-up unit for taking up the cover 41 of the magazine 13, peeling it off, rewinding it, and attaching it will be described. As shown in FIG. 2, the cover winding unit is provided with a concave support frame 42 that surrounds the magazine 13 and the magazine mounting table 39 on the lower side and on both sides, and a support shaft 87 is provided on the upper part of both side plates. First plates 100 and 101 mounted to be swingable
The take-up shaft 17 is installed rotatably. The first plates 100 and 101 are supported by a support shaft 8 by a spring 102.
The winding shaft 17 is urged downward with the fulcrum 7 as a fulcrum.

The support frame 42 is provided with a pinion 47 provided on the support frame 42 via a support shaft 92 so that the take-up shaft 17 horizontally moves integrally along the flange 13 a of the magazine 13. , 40, and are movably provided in engagement with the rack 45a spanned thereover. And
On the right side plate of the support frame 42, a gear transmission system and a winding motor (not shown) for rotating the winding shaft 17 and moving the winding unit as a whole are mounted. 42 and each component mounted thereon are configured to move in the direction of arrow b (winding direction) or in the direction of arrow b '(rewinding direction) opposite thereto.

The gear transmission system includes an output gear 8 of the winding motor.
0, an idle gear 81 that meshes with the gear 80, a switching lever 83 that is swingably provided on a support shaft 82 of the idle gear 81, and that is rotatably mounted at the tip of the switching lever 83, and that the gear 81 Gear 8 meshing with
4, an idle gear 86, a gear 89 fixed to a support shaft 88 of the winding shaft 17, and a gear 93 fixed to a support shaft 92 of the pinion 47. The switching lever 83 is constantly urged clockwise by a spring (not shown) and is connected to a solenoid 95. The solenoid 95 is normally off, and at this time, the switching lever 8
The reference numeral 3 swings clockwise around the support shaft 82, and the switching gear 84 meshes with the gear 93. on the other hand,
When the solenoid 95 is turned on, the switching lever 83 swings counterclockwise, and the switching gear 84
6 will be engaged. Further, the swing range of the switching lever 83 is regulated by a projection (not shown) provided on the support frame 42.

In the above-described gear transmission system, when winding the cover 41, first, the solenoid 95 is turned on and the winding motor is rotated forward. With this, the switching lever 8
3 swings counterclockwise, the switching gear 84 meshes with the idle gear 86, and the torque of the winding motor is transmitted from the output gear 80 to the gear 89 via the gears 81, 84, 86, and is wound. The shaft 17 rotates in the direction of the arrow w.

By this rotation, the first plates 100, 1
01 rotates upward with the support shaft 87 as a fulcrum, and the take-up shaft 17 rides on the front end of the cover 41, and
Are engaged with the locking holes 41a of the cover 41. Further rotation of the take-up shaft 17 causes the cover 41 to take up the take-up shaft 1.
7, and the support frame 42 moves in the direction of arrow b on the rack 45a. Thereby, the cover 41 is peeled off from the flange 13a of the magazine 13 to form an opening necessary for taking out the film 20 housed therein.

On the movement trajectory of the support frame 42, two sensors (not shown) for detecting a winding start position (home position) and a winding end position are provided. Support frame 4 with the latter sensor
By detecting that 2 has moved to the winding end position, the normal rotation of the winding motor is turned off, and the cover winding process is stopped.

On the other hand, to rewind the cover 41, the solenoid 95 is turned off (the switching gear 84
The winding motor is rotated in the reverse direction.
This rotates the pinion 47 in the direction of the arrow rw,
The support frame 42 moves in the direction of the arrow b '. At this time, the take-up shaft 17 is in a free state, the take-up shaft 17 is driven to rotate on the flange 13a in the direction of the arrow rw, and the cover 41 wound around its outer periphery is sequentially attached to the flange 13a. To go. Eventually, the pawl 17b of the winding shaft 17 comes off the locking hole 41a of the cover 41, and the winding shaft 17 falls into the concave portion 52 of the positioning plate 51.

By the way, the cover 41 by the winding shaft 17
Take-up shaft 1 to ensure winding and rewinding
7, a spring 102 applies a pressing force to the flange 13a. However, it is necessary that the pressure contact force be released when the winding shaft 17 runs from the concave portion 52 of the positioning plate 51 to the end of the flange portion 13a, or when the winding shaft 17 operates in reverse.

Therefore, in this embodiment, as shown in FIG. 6, a second plate 105 and a release spring 110 are provided. In FIG. 6, (a) shows when the winding shaft 17 is set at the home position, and (b) shows the winding shaft 17.
On the end of the flange 13a. The second plate 105 is connected to the first plate 1 by a support shaft 106.
The stopper pin 107 rotatably connected to the second plate 105 and attached to the second plate 105 can contact the lower end of the first plate 100. The pressing spring 102 has an upper end locked to the first plate 100 and a lower end fixed to the second plate 1.
05 is fixed to the pin 108 attached. Also,
The release spring 110 has one end locked to the pin 108,
Stopper pin 11 whose other end is attached to support frame 42
It is locked to 1.

In the above configuration, when the winding shaft 17 is located at the home position (see FIG. 6A).
The take-up shaft 17 falls into the concave portion 52 of the positioning plate 51 by its own weight. The spring force of the press contact spring 102 is set to be several times or more the spring force of the release spring 110. In this state, the second plate 105 is urged in the direction of arrow c with the support shaft 106 as a fulcrum by the spring force of the press contact spring 102. The stopper pin 107 is in contact with the lower end of the first plate 100. That is, at this time, the pressing spring 10
The spring force of 2 is such that the stopper pin 107
And does not act on the winding shaft 17 at all. Release spring 1 is provided on first plate 100.
Ten spring forces act, and the spring force at this time is 500 g. That is, the release spring 110 is set to a minimum spring force for setting the winding shaft 17 to the home position.

Here, when the winding motor is driven to rotate forward and the gears 86 and 89 are driven to rotate in the direction of arrow w, the winding shaft 17 is also driven to rotate in the same direction, and the gear 89 moves around the gear 86. It rolls and the winding shaft 17 rides on the end of the flange 13a (see FIGS. 6B and 5). At this time, the nail 17b
Engages with the locking hole 41a of the cover 41 and starts the winding operation of the cover 41. As the take-up shaft 17 moves from the home position to the flange 13a, the first plate 100 also rotates upward about the support shaft 87 as a fulcrum. At this time, a tensile force acts on the press contact spring 102, and the first plate 105 rotates in the direction of arrow c with the support shaft 106 as a fulcrum.
It is restrained by contact with 1. The take-up shaft 17 and the first plate 100 rotate slightly further upward by the rotational force from the take-up motor, and the distance between the first plate 100 and the second plate 105 increases. Accordingly, the tensile force acting on the pressure contact spring 102 also increases, and the spring force is accumulated in the pressure contact spring 102.

That is, the pressing spring 102 outputs a spring force after the second plate 105 is restrained by the stopper pin 111, and when the winding shaft 17 rides on the flange portion 13a, the necessary pressing force is applied to the winding shaft 17 To be given. At this time,
The spring force of the press contact spring 102 is set to 3.5 kg. As described above, when the winding shaft 17 rides on the flange portion 13a from the home position at the start of winding, the pressing force of the pressing spring 102 hardly acts on the winding shaft 17, so that the winding motor and the gear transmission system are used. The load on the lock hole 41a of the cover 41 is not greatly reduced, and no excessive force is applied to the lock hole 41a of the cover 41.
The operation of engaging with a becomes smooth.

In this embodiment, after the second plate 105 is restrained by the stopper pin 111 and the pressing spring 102 starts to apply a spring force to the winding shaft 17, the winding shaft 17 is placed on the flange 13a. The take-up shaft 17 is raised by 1.5 mm until the vehicle rides. Further, the thickness of the flange portion 13a is 2 mm. Therefore, if
When the operator mistakenly starts the cover winding process without installing the magazine 13, the winding shaft 17 runs on the mounting table 39, but the height of the winding shaft 17 is lower by the thickness 2 mm of the flange portion 13a. Become a pressure spring 1
02 does not act, only the spring force (500 g) of the release spring 110 acts. Therefore, the winding shaft 17
When slipped on the mounting table 39, the slip rotation is performed, and no further forward movement is made. That is, the winding shaft 17 does not move forward unless the magazine 13 is mounted, and is one means for determining the presence or absence of the magazine 13. In addition,
The upper surface of the mounting table 39 is subjected to a process for improving the slip,
By attaching a bearing or the like to the winding shaft 17,
Such prevention of the advancement of the winding shaft 17 can be made more effective. When the magazine 13 is not mounted, a member for preventing the winding shaft 17 from moving forward may be separately provided.

On the other hand, at the end of rewinding the cover, the plates 100, 105, the springs 102, 110
Performs an operation reverse to that at the start of the cover winding, and the winding shaft 17 returns to the home position. Again,
When the winding shaft 17 falls from the end of the flange portion 13a into the concave portion 52 of the positioning plate 51, the pressing force of the pressing spring 102 is released. Therefore, the impact applied to the winding shaft 17 is reduced, and the generation of noise and damage to each part are prevented.

Further, in this embodiment, the winding shaft 17
A roller 88a is mounted on the support shaft 88 as shown in FIG. If the support shaft 88 directly contacts the positioning plate 51 at the home position, there is a possibility that the take-up shaft 17 may have poor rotation. The roller 88a prevents such a problem and makes the operation of the winding shaft 17 smooth.

By the way, as shown in the above embodiment, the winding shaft 1
When the driving means 7 is installed on only one side and the rotational force in the direction of the arrow w is transmitted from the gear 86 to the gear 89 when the winding shaft 17 rides on the flange 13a (see FIG. 6), A downward force is applied to one side (drive side) of the winding shaft 17 and the other side (back side) tends to rise, and overloads occur on the gears 86 and 89, and durability is impaired. FIGS. 8 and 9 show an embodiment in which such a problem is improved.

In this embodiment, a cam 120 is attached to the drive-side end of the take-up shaft 17 and the large-diameter portion 12
0a can be in contact with the upper end of the contact plate 125. Other configurations are the same as those of the above embodiment. (A) of FIG.
As shown in (a '), when the winding operation is started,
The large-diameter portion 120a of the cam 120 is located on the upstream side in the rotation direction w. When the winding shaft 17 starts rotating in the direction of the arrow w and the pawl 17b engages with the locking hole 41a and the winding shaft 17 is about to ride on the flange portion 13a (FIG. 9B,
(See (b ')), the large-diameter portion 120a of the cam 120 contacts the upper end of the contact plate 125. Further, the large diameter portion 120 of the cam 120 is maintained until the winding shaft 17 rides on the flange portion 13a.
a rotates while sliding on the upper end of the contact plate 125 (FIG. 9).
(C) and (c ')).

That is, during the transition from (b ′) to (C ′) in FIG. 9 (while the take-up shaft 17 is running), the large diameter portion 120 a of the cam 120 slides on the upper end of the contact plate 125, The force applied downward to the drive-side end of the take-up shaft 17 is applied to the contact plate 125.
Will be accepted. Therefore, the lifting of the rear end of the winding shaft 17 and the overload of the gears 86 and 89 are prevented, and the load on the winding motor is reduced. Winding shaft 17
When the roller rolls on the flange portion 13a and winds up the cover 41, the cam 120 is located at a position away from the contact plate 125, and the pressing force of the winding shaft 17 is sufficiently applied to the flange portion 13a.

On the other hand, when winding the cover,
0 operates in the order of (c ′) to (b ′) to (a ′), and the winding shaft 17 is connected to the concave portion 52 of the positioning plate 51.
Buffers the impact when falling. The cam 120 and the contact plate 125 are worn by the cover winding and rewinding operations. Therefore, a roller that contacts the cam 120 may be provided instead of the contact plate 125.

FIG. 10 shows an example in which the force applied to the drive end of the winding shaft 17 is eliminated by a method other than using the cam 120. The downward force is applied to the drive-side end of the winding shaft 17 when riding on the flange portion 13a because the gears 86 and 89 transmit the rotational force in the direction of the arrow w. Therefore, in place of the gears 86 and 89, as shown in FIG.
8, a pulley 131 was attached, and a belt 132 was wound between the pulleys 130 and 131. According to the belt drive system, when transmitting the rotational force in the direction of arrow w to the winding shaft 17, no downward force is applied to the drive side end of the winding shaft 17, and the same effect as the cam 120 is obtained. Can be

The cover winding device according to the present invention is not limited to the above embodiments, but may be variously modified within the scope of the invention. For example, a drive system for rotating the winding shaft can adopt various forms. In particular, to prevent a downward force from being applied to the drive-side end of the winding shaft 17 at the start of winding, the cam
0, various methods other than using the belt 132 can be considered. As a means for positioning the winding shaft 17 to the home position, a configuration other than the positioning plate 51 may be used.

[0035]

As is apparent from the above description, according to the present invention, the means for releasing the pressure contact of the winding shaft is provided, so that the pressing force for pressing the winding shaft against the surface of the flange portion is such that the winding shaft is at home. between position and the home position and the flange end face
When it is positioned , it is released or weakened, so that the winding shaft is securely engaged with the front end of the cover, and the load on the driving means is reduced. Further, the impact when the winding shaft returns to the home position during rewinding is reduced.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a printer device provided with a cover winding device according to the present invention.

FIG. 2 is a perspective view showing one embodiment of a cover winding device according to the present invention.

FIG. 3 is a perspective view showing a cover and a winding shaft thereof.

FIG. 4 is a cross-sectional view for explaining the operation of the winding shaft.

FIG. 5 is a sectional view for explaining the operation of the winding shaft.

FIGS. 6A and 6B are front views for explaining the operation of the press-contact means and the press-contact release means, wherein FIG. 6A shows a state in which the winding shaft is at a home position, and FIG.

FIG. 7 is a sectional view showing a relationship between a support shaft of a winding shaft and a positioning plate.

FIG. 8 is a perspective view showing a main part of another embodiment of the cover winding device according to the present invention.

FIG. 9 is a view for explaining the operation of the device shown in FIG. 8;

FIG. 10 is a front view showing a modified example of the winding shaft driving means.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 13 ... Magazine 13a ... Flange part 17 ... Winding shaft 41 ... Sheet-shaped cover 51 ... Positioning plate 84, 86, 89, 93 ... Gear 100, 105 ... Plate 102 ... Pressure contact spring 110 ... Release spring

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Junichi Yamamoto 2-3-13 Azuchicho, Chuo-ku, Osaka-shi, Osaka Osaka Kokusai Building Minolta Camera Co., Ltd. (72) Inventor Naoyuki Matsuda Azuchi, Chuo-ku, Osaka-shi, Osaka Osaka International Building Minolta Camera Co., Ltd. (72) Inventor Hideaki Shimizu 2-3-1-13 Azuchicho, Chuo-ku, Osaka City, Osaka Prefecture JP-A-2-216142 (JP, A) JP-A-3-152027 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B65H 1/00-3/68

Claims (1)

(57) [Claims] 1. A sheet-like cover attached to a flange provided on an opening edge of a substantially box-shaped magazine is moved on the flange while the winding shaft rotates forward or backward, thereby winding the sheet. A take-up or rewindable cover take-up device, positioning means for holding the take-up shaft at a home position slightly lower than the surface of the magazine flange; and a flange from the home position while rotating the take-up shaft forward. Rolled up on the surface of the part and wound up the sheet-like cover,
A driving means for returning the sheet-shaped cover by returning to the home position while reversing the winding shaft, and for elastically pressing the winding shaft against the flange surface when the winding shaft rides on the flange surface. A press-contact means, wherein the winding shaft has a home position and the home position;
Cover winding apparatus characterized by comprising a pressure contact releasing means to weaken to not release the pressure contact force of the pressure means when located between the emission and the flange end face.