JP3409577B2 - Film transport device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a film transport device for processing a film in a processing section such as an exposure section.

[0002]

2. Description of the Related Art A film transporting device has been proposed in which a film is transported from a cartridge set in a cartridge setting unit to a processing unit by a film transporting unit for scanning and printing, and then rewound into the cartridge. However, in the conventional device, when the trailing edge of the film is not properly attached to the spool of the cartridge or the trailing edge of the film is disengaged from the spool of the cartridge, the film is rewound into the cartridge again. There is a problem that the film is damaged due to breakage or film jam.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and an object of the present invention is to allow a film detached from a spool of a cartridge to be discharged from a film conveying path. SUMMARY OF THE INVENTION An object of the present invention is to provide a film transport device which does not damage the film securely attached to the spool.

[0004]

According to another aspect of the present invention, there is provided a film transporting apparatus, wherein a cartridge setting section is provided in a film transporting path, a film processing section is disposed in the middle of the film transporting path, and the film is set in the cartridge setting section. In a film transport device that sends out a film from a cartridge, transports it to a processing unit by a film transport unit, scans and prints it, and then rewinds it to the cartridge again,
Detecting means for detecting that the trailing edge of the film has come off from the spool of the cartridge, film pulling means for pulling out all the film that has come off the spool from the cartridge in response to the detection signal of this detecting means, and all the film pulled out from the cartridge. And a film discharge means for discharging the film from the film transport path.

The film transport device of claim 2 is the same as that of claim 1.
In the film transport apparatus described in (1), the film transport mechanism is connected to the drive motor to configure the film transport means, and when the trailing end of the film that has been processed from the cartridge and processed the final frame is not displaced from the spool, When the rotation stops and the trailing edge of the film is disengaged from the spool, the rotation detection plate that continues to rotate due to the driving force of the film transport mechanism and the rotation detection plate that rotates the last frame of the film after processing It is characterized in that the detection means is composed of a rotation detection sensor for detecting.

The film transport device of claim 3 is the same as that of claim 2.
In the film transporting apparatus described in (1), when the trailing edge of the film is not disengaged from the spool, a slipping means is provided to prevent the driving force of the film transporting mechanism from idling to prevent the film from being loaded with a load more than a specified value. It is characterized by that.

[0007]

1 shows a plan view of a film transport device. As shown in FIG. 1, the film transporting device is provided with a processing section 2 for processing the film F in the middle of the film transporting path 1. At both ends of the film transporting path 1, a cartridge setting section 3 and a cartridge setting section 3 are provided. A winding pulley (winding body) 4 for winding and stocking the film F processed by the processing unit 2 is provided.

The processing section 2 is composed of an exposure section and a scanning section. The exposure unit prints the frames of the film F sent to the print gate 21A onto photographic paper (not shown) with exposure light, and the scanning unit reads and writes the magnetic recording of the film F having the magnetic recording unit. It is composed of a magnetic head (not shown) and the like.

Reference numeral 8 in the drawing denotes a drive motor (film transport motor), which feeds the film F frame by frame during forward rotation.
Moreover, it has a function to continuously feed the film F when reversing,
A drive pulley 82 is attached to the drive shaft 81 of the drive motor 8.

In the figure, reference numeral 5 denotes a film transport mechanism section in which the film transport path 1 is disposed, which is provided with first and second transport roller pairs 51, 52, and each transport roller pair 51, 5 is provided.
2 is a drive roller 51a, 52a and a pressure roller 51b, 5
It consists of 2b (Figs. 1 and 2). First drive roller 5
The drive shaft 51c of 1a includes pulleys 51d and 51e.
Is installed.

The drive shaft 52 of the second drive roller 52a
A pulley 52d is attached to c.

Reference numeral 7 in the drawing denotes a winding body rotating mechanism portion for rotating the winding pulley 4, which is composed of a friction 71 mounted on the pulley shaft of the winding pulley 4 and a winding drive gear 71a. Winding drive gear 7
A pulley 71B is attached to the drive shaft 71A of 1a.

Reference numeral 63 in the drawing denotes a friction shaft to which the frictions 63A and 63B and the pulley 631 are attached. As shown in FIG. 1, a drive belt B1 is stretched between the pulley 631 and the drive pulley 82 of the drive motor 8. In the figure, G1 is a guide pulley.

Further, as shown in FIG. 1 and FIG. 4, the friction 63B and the pulley 7 of the winding body rotating mechanism 7 are provided.
1B and the first drive shaft 51 of the film transport mechanism unit 5
The drive belt B2 is stretched between the pulley 51d of c and the pulley 52d of the second drive shaft 52c. In the figure, G2, G3 and G4 are guide pulleys.

Therefore, the driving force of the drive motor 8 is
It is transmitted to the first and second drive shafts 51c and 52c via the friction 63B to rotate the pair of conveying rollers 51 and 52.

S1 is a loading sensor for detecting the front end of the film F having a pair of detection elements and a light receiving element, which is the cartridge setting section 3 and the first conveying roller pair 51.
It is arranged between. In the figure, S3 is a trailing edge detection sensor (loading sensor) of the film F including a pair of detection elements and a light receiving element, which is provided between the first conveyance roller pair 51 and the second conveyance roller pair 52, and the second conveyance roller pair 52. Conveyor roller pair 5
It is located closer to 2.

Reference numeral 6 in the drawing denotes a spool rotation mechanism portion for rotating the spool C2 of the cartridge C set in the cartridge setting portion 3, which is provided with a drive shaft 61, spool rotation shafts 62, 62A and a clutch 64. . The rotational driving force of the drive shaft 61 is transmitted to the spool rotation shaft 62 via gears 61a, 61b, 61c and a clutch gear 64C described later.

The clutch 64 is for cutting off the transmission of the rotational drive force from the drive shaft 61 to the spool rotary shaft 61, and as shown in FIG. 3, a clutch lever 64A, a solenoid 64B, and a clutch gear 64C. The crack lever 64A is rotatably attached to the drive shaft 61. When the solenoid 64B is in the off state, the operating body 64D moves and pushes the clutch lever 64A as shown in FIG.
When the meshing state of the clutch gears 64C and 64c is released and the solenoid 64B is in the ON state, the clutch lever 64A returns to its original position so that the gears 61b and 62c mesh with the clutch gear 64C. .

In the figure, reference numeral 66 is a rotation detecting plate attached to the drive shaft 61, and a through hole (not shown) is formed on the circumference of the rotation detecting plate 66. In the figure, S2 is the rotation detecting plate 66.
A rotation sensor for detecting the number of rotations of the rotation detection plate 66 by detecting the passage of the through hole, and includes a pair of detection element and light receiving element.

Then, as will be described later, when the film F is rewound into the cartridge C, the tip of the film F comes off the first conveying roller pair 51 of the film conveying mechanism section 5 and at the same time the rotation sensor S2 of the rotation detecting plate 66 is moved. The rotation speed is read, and when the rotation speed reaches the specified value, the clutch lever 64
A is released by the solenoid 64B to prevent the film F from being overwound.

The trailing edge of the film F is the cartridge C.
If it is out of the spool C1 of the film, the rotation detecting plate 66 is processed even after the final frame of the film F is processed as described later.
However, the rotation sensor S2 detects this and sends a trailing edge deviation signal to the drive circuit of the drive motor 8 to continuously convey the film F to be wound up by the winding pulley 4 and detect the trailing edge. When the sensor S3 detects the trailing edge of the film F, the transport of the film F is stopped.

Drive shaft 61 to which the rotation detecting plate 66 is attached
A pulley 611 is attached to this pulley 611.
And friction 63A of the friction drive shaft 63,
A drive belt B4 is stretched between the pulley 51e of the first drive shaft 51c of the film transport mechanism unit 5. In the figure, G5 is a guide pulley. Therefore, the driving force of the drive motor 8 rotates the first drive shaft 51c via the friction 63A and rotates the spool rotation shaft 61 via the friction 63A and the clutch 64.

When the rear end of the film F is securely attached to the spool C1, after the processing of the final frame of the film F, due to the presence of the frictions 62A and 63B, the drive motor 8 with respect to the conveying roller pair 51 and 52 is driven. The drive pulley 82 of idling. Therefore, the driving force of the drive motor 8 is not transmitted to the drive shaft 61 to which the rotation detection plate 66 is attached, and the rotation of the rotation detection plate 66 is stopped.

The rotation sensor S2 serves as the rotation detection plate 6
When the stoppage of 6 is detected, the solenoid 64B of the clutch 64 is turned on to connect the drive shaft 61 of the spool rotation mechanism 6 to the spool rotation shaft 62.

The frictions 63A and 63B attached to the friction shaft 63 are, for example, a rotary body in which a drive shaft and an external fitting member are stacked, and the drive shaft and the external fitting member are pressure-bonded via a friction material. It is possible to think of what was made. As will be described later, the friction 63B conveys the conveyance roller pair 51, 52 after the processing of the final frame of the film by idling the drive pulley 82 of the drive motor 8 when the rear end of the film F is not displaced from the spool C1. It is intended to prevent the film F from being overloaded by a predetermined value or more by the operation. That is, it is possible to prevent the film F from being applied with a load equal to or more than a specified value by rotating the outer fitting member while slipping the rotation of the friction drive shaft 63 of the friction 63B.

The structure of the frictions 63A and 63B is not particularly limited as long as it can absorb the above error, and a torque limiter is used in this embodiment.

Friction 7 of the winding body rotating mechanism 7
As a configuration of 1, for example, a rotating body in which a drive shaft and an external fitting member are stacked, and the drive shaft and the external fitting member are pressure-bonded to each other via a friction material can be considered. This friction 71
Is for absorbing an error between the film feed amount by the drive roller of the film transport mechanism section 5 and the film winding amount by the winding pulley 4. That is, it is possible to prevent the film F from being applied with a load of a specified value or more by rotating the outer fitting member while slipping the outer fitting member against the rotation of the drive shaft of the friction 71.

The structure of the friction 71 is not particularly limited as long as it can absorb the above error. In this embodiment, an oil damper is used as the friction 71.

Reference numeral 10 denotes a movable film guide,
It has a function of guiding the movement of the film F on the film transport path 1 and discharging the film F from the film transport path 1. The movable film guide 10 is composed of a guide body 10A and a solenoid 10B. The guide body 10A is freely mounted on the seesaw as shown by the chain double-dashed line in FIG. 10C pushes the guide body 10A to move it to the position indicated by the alternate long and two short dashes line so as to assume the film discharge posture. On the other hand, when the solenoid 10B is in the off state, the operating body 10C of the solenoid 10B retracts and the guide body 10
The film F is guided so that the film F moves on the film transport path 1 with the position A indicated by the solid line.

Reference numeral 11 is a fixed film guide.

Next, the transport operation of the film F will be described with reference to the flowchart shown in FIG. (1) First, the solenoid 64B of the clutch 64 is turned on and the drive motor 8 is rotated in the normal direction to feed the film F wound around the spool C1 of the cartridge C by the spool rotation shafts 62 and 62A, while the rotation sensor S2 is used. The number of rotations of the rotation detection plate 66 is read (step 100 to step 102). (2) Next, after the leading edge of the fed film F is nipped by the pair of first transport rollers 51, the loading sensor S1
Detects the leading edge of the film F (step 10)
3).

(3) Next, the rotation of the first driving roller 51b is started to be counted by the detection signal of the loading sensor S1, and after counting one rotation of the first driving roller 51b, the solenoid 64B of the clutch 64 is turned off. To stop the rotation of the spool rotary shaft 62 (step 104,
105). At this time, the leading end of the film F is sandwiched by the first pair of transport rollers 51. (4) Thereafter, the film F is pulled out from the cartridge C by the pair of transport rollers 51 and 52, and is frame-fed along the film transport path 1. The processing section 2 processes the frames one by one, and the film is wound on the winding pulley 4 and stocked. (Steps 106 and 107).

(5) The trailing edge of the film F is the cartridge C
When the rotation detecting sensor S2 does not detect the detachment of the rear end of the film F, the solenoid 64B of the clutch 64 is turned on to turn the drive shaft 61 of the spool rotating mechanism 6 into the spool rotating shaft 62. (Steps 108 and 109). When the trailing edge of the film F is disengaged from the spool C1 of the cartridge C,
It will be described later (step 109, steps 116 to 12)
0) (6) Next, the take-up pulley 4, the conveying roller pairs 51 and 52, and the spool rotary shaft 62 are rotated by the reverse rotation of the drive motor 8 so that the film F is fed from the take-up pulley 4.
Is continuously sent, the rotation number of the rotation detection plate 66 is read by the rotation sensor S2 (steps 110 and 111).

(7) Next, the leading edge of the film F is detected by the loading sensor S1, and the leading edge of the film F is disengaged from the first conveying roller pair 51, and at the same time, the rotation sensor S2.
The read value of the number of rotations of the rotation detection plate 66 by means of reaches the specified number, the solenoid 64B of the clutch 64 is turned on, and the rotation of the spool rotation shaft 62 is stopped (step 112-).
Step 115). (8) The rear end of the film F is the spool C of the cartridge C
If it is out of 1, the rotation detection sensor S2 detects the detachment of the rear end of the film F, and the film F is conveyed until the rear end of the film F is detected by the rear end detection sensor S3 (step 112). , 116). (9) Next, when the trailing edge detection sensor S3 detects the trailing edge of the film F, the solenoid 10B is turned on to cause the movable film guide 10 to take the film discharging posture (step 117). (10) Further, when the trailing edge detection sensor S3 detects the trailing edge of the film F, the drive motor 8 reversely rotates and the film F
Are transported (step 118). (11) When the rotation sensor S2 detects the number of rotations of the rotation detection plate 66 and there is no abnormality, and when the trailing edge detection sensor S3 detects the leading edge of the film F, a certain amount of motor drive is applied to drive the film. F is carried out by the film guide 10 (steps 119 and 120).

[0035]

As is apparent from the above description, according to the film transporting apparatus of the present invention, the detection means detects that the trailing edge of the film has come off the spool of the cartridge,
After all the detached film is pulled out from the cartridge by the film pull-out means, the film ejecting means ejects the film from the film transport path, so that the film detached from the spool of the cartridge is prevented from being rewound into the cartridge again. Therefore, it is possible to prevent an accident such as a film break or a film jam.

Further, when the trailing end of the film is securely attached to the spool of the cartridge, the film is not damaged by the idling means.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a film transport device of the present invention.

FIG. 2 is a side view showing the embodiment.

FIG. 3 is a side view of the clutch portion of the embodiment.

FIG. 4 is a side view showing the embodiment.

FIG. 5 is a film transport flowchart according to the embodiment.

[Explanation of symbols]

F film 1 Film transport path 2 processing section 3 Cartridge setting part 4 Winding pulley (winding body) 4 10 Movable film guide (film ejection means) 63A friction 63B friction

─────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-8-22084 (JP, A) JP-A-4-328539 (JP, A) JP-A-5-265098 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) G03B 27/00-27/80

Claims (3)

(57) [Claims] 1. A film setting path is provided with a cartridge setting section, a film processing section is disposed in the middle of the film transfer path, a film is sent out from a cartridge set in the cartridge setting section, and a processing section is provided by a film transfer means. In the film transport device, the film is transported back to the cartridge, scanned and baked, and then rewound into the cartridge again. The detection unit that detects when the trailing edge of the film is disengaged from the spool of the cartridge and the detection signal of this detection unit disengages from the spool. A film transport device comprising: a film pull-out means for pulling out all the film from the cartridge; and a film discharge means for discharging the film completely pulled out from the cartridge from the film transport path. 2. A film transport mechanism connected to a drive motor constitutes the film transport means, and when the trailing end of the film, which has been fed from the cartridge and processed the final frame, is not disengaged from the spool, it is rotated. When the film is stopped and the trailing edge of the film is disengaged from the spool, the rotation detection plate that continues to rotate due to the driving force of the film transport mechanism even after the last frame of the film has been processed, and the last frame of the film has been processed. 2. The film transport apparatus according to claim 1, wherein the detection means is composed of a rotation detection sensor that detects a rotation detection plate that continuously rotates. 3. When the trailing edge of the film is not disengaged from the spool, idle driving means is provided for idling the driving force of the film transport mechanism to prevent the film from being loaded with a load more than a specified value. The film transport device according to claim 2.