JPH05188447A - Supply adapter and rewinding adapter for 135 film in medium-format camera - Google Patents

Abstract

PURPOSE:To easily load a cartridge for using 135 film in a medium-format camera using 120 and 220 film. CONSTITUTION:A shaft coupling 12 is fixed on the upper surface 11a of a holding frame 11 which is bent to be nearly L-shaped, and a shaft 12b on the lower part of the coupling 12 is movably fitted in the inner surface of the minor axis P1 of a 135 film cartridge P, then an auxiliary frame 14 is pivotally supported so as to be opened and closed by a shaft 13 laid between lower bent parts 11b and 11b and pressed clockwise by a spring 15. A shaft coupling 16 is turnably mounted in the frame 14, and a cross-shaped groove 16a formed at the upper end of the coupling 16 is engaged with a rib provided on the inner surface of the long shaft side of the cartridge P, then a cartridge holding frame 1 is inserted in the film supply chamber of a camera body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a 135 film supply adapter and a rewind adapter in a medium format camera for using 135 film in a medium format camera using 120, 220 film.

[0002]

6 × using 120, 220 film
The size of the medium format cameras from 4.5 cm format to 6 x 9 cm format is 2.7 times to 5.8 times the size of 35 mm format, which is 4x in combination with the latest film performance improvement. Excellent image quality comparable to large format cameras of 5 inches or more, and 35 mm
Since it has the same mobility as a full-size camera, it is highly regarded and used by not only professional photographers but also advanced amateur photographers.

However, in terms of quantity, it is not the ratio of a small camera that uses 135 film for general amateurs, and there are many places that do not have 120 or 220 film in tourist spots and so on. In many cases, there is no film of the type desired by the user.

In view of these points, the conventional 120, 2
A medium format camera that uses 20 films is provided which allows 135 films to be used as well. Most of them are 12
In addition to the 0,220 film back, a 135 film back is provided, and since the camera body side only needs to mount a 35 mm-size mask on the finder surface, no particular problem occurs.

On the other hand, a medium format camera which does not have a film back exchange and which can use 135 film is 13
5 A film patrone winding shaft is axially supported by both spool bearings on the film supply chamber side via separate hubs, which are supply adapters, on both sides, and the rewinding knob previously provided on the camera side via one hub and the above-mentioned rewinding knob. While connecting the patrone reel, insert a take-up adapter that can be engaged with and disengaged from the camera-side take-up spindle into the film take-up chamber by operating the rewind button provided on the camera in advance. , The screen frame adapter for partitioning the screen frame and the finder adapter for partitioning the finder surface were attached.

Alternatively, instead of the above method, a patrone loaded with unexposed film is inserted into the film supply chamber side together with the above two hubs, and an empty patrone is inserted into the film winding chamber together with the same hub. , The film cartridge chamber side patrone winding shaft is pivotally supported on the camera side spool bearing, and the film take-up chamber side patrone winding shaft is connected to the take-up shaft so that the so-called double patrone system can wind 135 films. A method is also possible.

Then, in order to wind a predetermined amount of 135 film, a method of providing a winding stop mechanism on the side of the 135 film adapter for automatic winding stop, and a claw that makes a clicking sound by falling into the perforation of the 135 film are used. There is a method of providing the winding amount based on the number of times this click sound is generated, and regarding the film counter, a film counter is provided separately from the counters for 120 and 220 films.
A 5 film counter was attached to the camera.

[0008]

However, in the case of the conventional 135 film supply adapter in the medium format camera without the exchange of the film back, the former is 1
When loading 35 films, separate hubs must be attached to both ends of the reel of the cartridge and inserted into the film supply chamber, and one of the reels must be connected to the rewind knob on the camera body side via the hub. The film loading is troublesome, and the film rewinding knob is projected from the camera body, and the protruding rewinding knob is 135
There is a problem that it rotates during film winding, and it interferes with the base on which the camera is mounted or the hand holding it, which obstructs the film winding.To avoid this, if the rewinding knob is not projected, rewinding There was an inconvenience that it became difficult to operate.

The latter requires no rewinding knob, but a similar hub must be attached to the film winding chamber side, and after the tip of the film is wound around the patrone winding shaft on the winding chamber side. However, it requires a very troublesome operation of sealing the cartridge and loading it in the camera, which is against the current trend of easy loading, which is a big problem in practical use.

The present invention has been made in view of the above points, and an object thereof is to provide a 135 film supply adapter for a medium format camera in which 135 film can be easily loaded, and further, rewinding of the 135 film can be facilitated. It is also an object to provide a rewind adapter.

[0011]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention has a film back non-exchange 120, 220.
In order to use 135 film in a medium format camera using film, a supply adapter for 135 film in a medium format camera in which one of a pair of spool bearings in the film supply chamber is used as a rewinding member of the 135 film. There is provided a pair of shaft couplings that respectively support both ends of the 135 film Patrone bearing, and a U-shaped holding frame that faces the pair of shaft couplings at a predetermined interval. Is inserted into the film supply chamber, the shaft joints of the pair of shaft joints on the side facing the rewinding member are made rotatable with respect to the holding frame, and the Patrone winding shaft is wound through the shaft joints. The present invention provides a supply adapter for 135 film in a medium format camera that can be connected to a return member.

Further, in the medium format camera equipped with the above-mentioned 135 film supply adapter, the tightening means for holding the rewinding member by being attached to the rewinding member and rotating in the rewinding direction is provided. 1 in medium format camera
A rewind adapter for 35 film is also provided.

[0014]

The 135 film supply adapter in the medium format camera according to the present invention is configured as described above, so that the unexposed 135 film cartridge is attached to the supply adapter in advance, and the rewinding member is pulled out to the film supply chamber. After the insertion, the rewinding member may be pushed in to be connected to the Patrone winding shaft, and the operation is almost as easy as loading the 120 and 220 films.

Further, the rewinding adapter may be put on the rewinding knob and rotated in the rewinding direction only when rewinding the 135 film, which facilitates the rewinding operation and uses 120 and 220 films. It is possible to make unnecessary rewinding knobs small so as not to project from the bottom of the camera at the time of shooting a 135 film.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be specifically described below with reference to the drawings. Prior to that, an outline of a portion relating to film winding of a medium format camera for carrying out the present invention will be described with reference to FIG. Briefly explained.

This medium-format camera is a lens shutter camera with a distance meter interlocking and a film back non-exchangeable, which can shoot 12 or 24 frames of a 56 × 56 mm format screen using 120 or 220 film. 24
For example, 20 frames (in the case of a 36-sheet film) can be photographed on a x56 mm panoramic screen.

The 120 or 220 film is loaded into the film supply chamber 1a of the camera body 1 using the back cover 4,
The film is wound on an empty spool inserted into the film winding chamber 1c through the screen frame 1b. At that time, as the backing paper or film advances, the counter roller 2 rolls, the rotation angle is decelerated and transmitted to a known indexing plate, and the film is stopped and the counter is displayed.

In this embodiment, the counter roller 2 described above is used.
In order to utilize the 135 film even when using the 135 film, the first friction wheels 2a, 2a for the 120, 220 film integrally formed on the upper and lower sides of the counter roller 2 as well as the second friction wheel for the 135 film are pressed against each other. Friction car 2
b and 2b are integrally provided. This second friction wheel 2b,
It is desirable that the diameter of 2b is slightly smaller than that of the first friction wheels 2a, 2a so as not to contact the emulsion surface when the 120, 220 film is fed.

In order to switch between 120 and 220 films, a low step surface 3b is formed at both ends of the film pressure plate 3 with a step difference of about 120 film thickness with respect to the film pressing surface 3a. Then, the index 3c recessed on the surface is used to display the film type 4a (120), 4b on the back cover 4.
This is done by switching to any of (220).
As a result, the contact surface of the film crimping plate 3 abutting on the outer rail 1f of the camera body 1 is switched to change the film tunnel amount, and the film counter display on the camera body side is changed to 12 frames and 2 by a known switching mechanism.
Automatically switched to 4 pieces.

A spool bearing 5 is rotatably mounted on the film supply chamber 1a side so as to be slidable in the axial direction by a predetermined distance. A slit 5a is provided on the inner end surface of the spool bearing 5. The opposite side is projected from the camera body 1. It is applied to the rewinding knob 5b (see FIG. 4) which is a rewinding member having a slightly larger diameter. A spool bearing 6 is mounted on the film winding chamber 1c side so as to be slidable in the axial direction for a predetermined distance, and a winding release button 6b (see FIG. 6) described later is slidable in the axial direction in the center portion. It is provided in.

All of these spool bearings 5 and 6 are biased in a direction projecting from the camera body, and by operating the release levers 7 to project from the bottom surface of the camera body and resist the biasing force. It is locked in a position slightly retracted from the bottom surface of the camera body by being pushed in, so that it does not come into contact with the base on which the camera body is placed, the grasped hand, or the like.

1 and 2 show the film supply chamber 1 described above.
1 shows an embodiment of a supply adapter for 135 film according to the present invention mounted on a. The supply adapter 10 includes an upper surface 11 of a holding frame 11 that is bent into a substantially L shape.
A shaft joint 12 is fixed to a, and an inner peripheral surface 12a thereof can be loosely fitted to an outer peripheral portion of a spool bearing 8 fixed to an upper portion of the film supply chamber 1a. The hub P of the winding shaft P of P can be supported.

A shaft 13 is installed between the lower bent portions 11b and 11b of the holding frame 11, and the shaft 13 is used to bend the bent portion 1 of the auxiliary frame 14.
The auxiliary frame 14 is pivotally attached to the holding frame 11 so as to be openable and closable by being inserted through 4a and 14a. Holding frame 11 and auxiliary frame 1 around shaft 13
4, the spring 15 is engaged with the auxiliary frame 14 to urge the auxiliary frame 14 in the clockwise direction in the figure, and the bent portion 14a contacts the holding frame 11 so that the auxiliary frame 14 is substantially perpendicular to the holding frame 11. In the normal state, it should have a generally U-shape.

A shaft joint 16 is rotatably fitted in the auxiliary frame 14, and a cross-shaped slit 16a is formed at an upper end portion of the shaft joint 16 to form a hub P of the winding shaft of the cartridge P.
2 and the rib P3 formed on the inner surface of the rib 2, and a rib 16b is formed on the lower end side thereof so that the rib P3 can be engaged with the slit 5a of the spool bearing 5 on the camera body 1 side. A cylindrical portion 16c is provided on the outer side of the inner peripheral surface 16c 'so that the inner peripheral surface 16c' is axially supported by the outer peripheral surface of the spool bearing 5.

FIG. 3 is an exploded perspective view showing a rewinding adapter which can be detachably attached to the rewinding knob 5b, and FIG. 4 is a sectional view showing a state where the rewinding adapter is mounted on the rewinding knob 5b.

The rewinding adapter 20 is knurled to prevent slippage on its outer periphery and has movable pins 22, 2 on its inner surface.
2 has a large diameter outer cylinder 21 and a center hole 21a of the outer cylinder 21 that is relatively rotatably mounted in the flange portion 23a.
A regulating disc 23 that regulates a relative rotation angle with the outer cylinder 21 by abutting against 22 and fixed pins 24 and 24 planted in the regulating disc 23 are pivotally attached at one end to the vicinity of the free end. The arc-shaped tightening lever 2 in which the movable pins 22, 22 are loosely fitted in the dog-legged cam grooves 25a, 25a formed in
It consists of 5, 25.

The cam groove 25a of the tightening lever 25 is composed of an inclined groove portion 25a 'which is inclined with respect to the circumferential direction and a circumferential groove portion 25a ", and the outer cylinder 21 is rotated in the X direction shown in FIG. When the movable pin 22 is moved, the movable pin 22 is moved to the inclined groove portion 25.
By sliding in a ', the free end of the tightening lever 25 is driven inward, and the outer periphery of the rewinding knob 5b is clamped, and the movable pin 22 enters into the circumferential groove 25a ". The respective shapes are determined so that the rewind knob 5b can be firmly gripped.

Next, the structure of the 135 film winding adapter will be described with reference to FIGS. Take-up adapter 3
0 is a drive hub 31 having a cross groove 31a that meshes with the take-up shaft 9 on the camera body side shown in FIG. 12, a pipe-shaped drive shaft 32 integrally fixed to the drive hub 31, and the drive hub 31. A take-up spool 33 which is loosely fitted to the outer peripheral portion of the shaft 32;
A rod 35 slidably mounted on the inner peripheral portion of the drive shaft 32 in the axial direction and biased downward in FIG. 6 by a spring 34, and a U-shaped roller mounted on the drive shaft 32 so as to be relatively rotatable. An instruction frame 36, a pressing roller 37 rotatably attached to a free end portion of the roller instruction frame 36, and a roller support frame 36.
A lower end portion is fixed to the upper end portion, and an upper end portion includes a pressing spring 38 slidably guided in the longitudinal direction.

A connecting pin 35a is planted on the rod 35, and the connecting pin 35a is inserted through the elongated hole 32a of the drive shaft 32 in the axial direction to engage with the groove 33a of the take-up spool 33. The drive shaft 32, the take-up spool 33, and the rod 35 rotate together by rotating in the same direction, and by moving the rod 35 upward against the spring 34 from this state, the connecting pin as shown in FIG. 35a separates from the groove 33a so that the take-up spool 33 can freely rotate with respect to the drive shaft 32 and the rod 35.

A clutch spring 39 is engaged around the shaft 36a of the roller support frame 36 so that the free end portion of the roller support frame 36 is clamped by the rod 35 from both sides as shown by phantom lines in FIG. Eccentric groove 35b on the outer peripheral surface near the lower end of
Is provided so that a part of the clutch spring 39 is flush with the outer peripheral surface of the rod 35, and at least one free end of the clutch spring 39 is pushed into the eccentric groove 35b as shown by a solid line in FIG. It is depressed so that the rod 35 can be locked in the raised state. In this state, when the drive shaft 32 is rotated by the winding operation, the clutch spring 39 is disengaged from the eccentric groove 35b, the rod 35 is lowered, and the connecting pin 3 is released.
5a engages with the groove 33a so that the take-up spool 33 moves the drive shaft 3
Combined with two.

In the state where the winding adapter 30 having such a structure is mounted in the film winding chamber 1c,
The cross groove 31a of the winding shaft 31 is the winding shaft 9 on the camera body 1 side.
The lower end shaft portion 36b of the roller support frame 36 is rotatably loosely fitted to the spool bearing 6, and the lower end surface of the rod 35 is slidably provided on the spool bearing 6. Winding release button 6b urged downward by 6a
Engage the upper end of the.

Further, a screen frame adapter 40 for 135 films as shown in FIG. 9 is attached to the screen frame 1b of the camera body 1 shown in FIG.

The screen frame adapter 40 has an adapter body 41 whose outer peripheral surface is fitted to the screen frame 1b of the camera body 1.
And a wing portion 42 which is integrally fixed to the wing portion and which has elasticity and projects forward and backward in the film advancing direction. The adapter body 41 is formed with a pair of inner rails 41a, 41a and outer rails 41b, 41b, and the wing portion 42 is bent slightly downward, and the free end portion of each of them is a screen frame on the camera body 1 side. When the adapter body 41 is slightly lifted by coming into contact with the sleeve portion 1d and the 135 film is loaded and the back cover 4 is closed, the film pressure plate 3 is urged by the urging force of the wing portion 42. In addition, the adapter body 41 can be pressed against the curl force of the 135 film until it comes into contact with the outer rail 1 on the camera body side, and the urging force of the wings 42 is stronger than the curl force of the 135 film. Set each bias.

In the state shown in FIG. 10 in which the step surface 3b of the film pressure bonding plate 3 is in contact with the outer rail 1f of the camera body 1, the outer rail 41b of the adapter body 41 is pressed by the pressing surface 3a of the film pressure bonding plate 3. The respective dimensions are set so that the inner rail 41a is held at the localization value and the inner rail 41a is flush with the inner rail 1e on the camera body 1 side in this state.

By doing so, the film pressing surface 3a and the camera body side are provided between the film pressing surface 3a of the film pressure plate 3 and the inner rail 41a of the adapter body 41 with the back cover 4 closed. The tunnel amount for one film, which is the same as the tunnel amount for 220 films formed between the inner rail 1e, is secured.

As shown in FIG. 10, the 135 film F is held in close contact with the film pressing surface 3a of the film pressure plate 3 by the curl force of the film as shown in FIG. Even at that time, the film surface is held at a predetermined position, and the flatness is also kept good.

Next, the operation of the embodiment having the above structure will be described. First, the auxiliary frame 14 of the supply adapter 10
Is opened against the spring 15 and a 135 film patrone P accommodating an unexposed film is attached to the auxiliary frame 14
Close. Here, open the back cover 4 of the camera body 1,
The indicator 3c of the film pressure bonding plate 3 is displayed on the back cover 4 by the indicator 4b (22
0), the release levers 7 and 7 are operated to cause the spool bearings 5 and 6 to project outward by their own biasing force. Supply adapter 1 with the Patrone P attached in this state
The inner peripheral surface 12a of the shaft coupling 12 of 0 is fitted to the outer peripheral portion of the fixed spool bearing 8 on the camera body side to supply the adapter 1.
0 into the film supply chamber 1a, and then the spool bearing 5
The inner peripheral surface 16c 'of the cylinder 16c of the shaft coupling 16 by pushing
The shaft coupling 1 into the slit 5a of the spool bearing 5.
The rib 16b of No. 6 is inserted.

To mount the winding adapter 30 in the film winding chamber 1c, the cross groove 31a of the drive hub 31 is engaged with the rib 9a of the winding shaft 9 on the camera body side, and the winding adapter 30 is attached. After the insertion, the spool bearing 6 is pushed in to be loosely fitted to the inner peripheral surface 36b 'of the shaft portion 36b, and further, the screen frame adapter 40 is fitted to the screen frame 1b of the camera body 1 and the peripheral side surface of the screen frame main body 41 is fitted thereto. Put them together.

In this state, the roller support frame 36 of the winding adapter 30 is turned upside down until it comes into contact with the end of the camera body 1 as shown by the phantom line in FIG.
After inserting the leading end of the 135 film F pulled out from the inside into the slit 33b of the take-up spool 33 and locking it,
The roller support frame 36 is rotated inward to the state shown by the solid line in the figure to close the back cover 4. As a result, the pressing spring 38
Is pressed against the inner surface of the back cover 4, the pressing roller 37
The perforation band of the 5 film F is pressed against the second friction wheel 2b of the counter roller 2 on the camera body side, and the screen frame adapter 40 is pressed against the film pressure plate 3 and held at a predetermined position.

Therefore, when the winding lever on the camera side is operated to rotate the winding shaft 9 in the winding direction, the drive hub 3
1, the drive shaft 32, and the take-up spool 33 rotate together to wind up the film, and at the same time, the rotation of the take-up shaft 9 charges a shutter (not shown) on the lens side through a known clutch mechanism.

As the 135 film F advances, the counter roller 2 rotates due to friction with the 135 film F,
A known index plate rotates through a reduction gear train (not shown),
When the film is rotated by a rotation angle corresponding to the distance from the start mark of the 20,220 film to the first film, the winding is stopped and the film counter displays the first frame. In this way, in the case of 135 film, the winding length up to the first sheet is slightly longer than the usual length up to the first sheet,
There is no problem because it is within the allowable range when viewed from the full length of the film.

After the first image is taken, the film body is unwound and the film can be wound up.
It feeds almost the same amount as the film and stops. At this time, 135
The second friction wheel 2b in contact with the perforation band of the film is formed to have a slightly smaller diameter than the first friction wheel 2a in contact with both sides of the 120 and 220 films. The gap between the 135 film pieces is slightly smaller than that of the 120 and 220 film pieces, but the difference is very small.
Since there is a considerable margin in the interval between 0 film frames,
There is no risk of adjacent screens overlapping.

When a predetermined number of images (for example, 36 frames of film, 20 frames of panoramic screen) have been photographed in this manner, the winding release button 6b provided on the spool bearing 6 on the film winding chamber 1c side is pushed to wind the film. Rod 35 of adapter 30
Drive upwards. In this state, as shown in FIG. 7 and FIG. 8, at least one of the free ends of the clutch spring 39 falls into the eccentric groove 35b of the rod 35 to lock the rod 35 in the pushing position, and the connecting pin 35a engages the take-up spool 33. The drive shaft 32 and the take-up spool 33 are released from the groove 33a, and the connection between the drive shaft 32 and the take-up spool 33 is released.

Therefore, in this state, the film supply chamber 1
When the rewind knob 5b on the a side is rotated in the rewind direction,
The shaft joint 16 of the cartridge holding frame 10 rotates in the same direction by the engagement of the rib 16b and the slit 5a, and the winding shaft of the cartridge P is rotationally driven via this shaft joint 16.
The 35 film is rewound into the cartridge P. Here, by opening the back cover 4, the film counter returns to the start position, and the cartridge P can be taken out together with the cartridge holding frame 10.

At this time, since the rewinding knob 5b is located slightly retracted from the bottom surface of the camera body 1, the rewinding operability is not so good. To improve the operability, slits or connecting holes are formed on the surface of the rewinding knob 5b to rewind it with a coin or a rewinding tool provided separately, or to fold the crank like a rewinding knob of a 35 mm camera. Although a method of providing it in a foldable manner is conceivable, if the rewinding adapter 20 as shown in FIG. 3 is used, it is convenient because the rewinding knob 5b does not require any extra processing.

That is, only when the 135 film is rewound, the rewinding adapter 20 is put on the rewinding knob 5b and the outer cylinder 21 is rotated in the rewinding direction.
3 is pressed by the rewinding knob 5b and remains stationary, and the outer cylinder 2
1 rotates, and the movable pin 22 moves the cam groove 2 of the tightening lever 25.
It moves in the inclined groove portion 25a 'of 5a. As a result, the tightening lever 25 rotates inward with the fixing pin 24 as a fulcrum, and the inner peripheral surface 25c holds the outer peripheral surface of the rewinding knob 5b. Further, the outer cylinder 21 is rotated to move the movable pin 2
As 2 engages with the circumferential groove portion 25a ″ of the cam groove 25a, the tightening lever 25 grips the rewinding knob 5b more firmly and the rewinding adapter 20 is integrally fixed to the rewinding knob 5b. As the movable pin 22 engages with the end of the circumferential groove 25a ″, the outer cylinder 21, the regulation disk 23, the tightening lever 25 and the rewinding knob 5b are integrally rotated to rotate the film in the rewinding direction. Rewind.

When this rewinding adapter is used, the rewinding knob that rotates when the 135 film is rewound can be prevented from protruding from the bottom surface of the camera body and does not hinder the rewinding of the film. , This rewinding adapter projects largely from the bottom surface of the camera body to facilitate the rewinding operation.

In addition to the rewinding adapter described above, one end side is fixed by using a tripod screw hole at the bottom of the camera body, and the other end side is fixed by a hanging metal fitting 1g (see FIG. 12) on the camera body side to prevent rotation. And a rewind adapter in which a large-diameter adapter knob equipped with a connecting pin that can fit into the rewind knob on the camera body side is rotatably mounted on this adapter board. It is also possible to drive the rewinding direction with the belly of the thumb. In this case, the rewinding adapter does not fall off and the operability is further improved.

[0050]

As described above, the supply adapter and rewind adapter for 135 film in the medium format camera according to the present invention are the supply adapters for supporting the Patrone winding shaft of the 135 film from both ends. Since it has been provided, unlike the conventional apparatus of the same kind, a troublesome operation of inserting separate hubs on the upper and lower sides of the patrone winding shaft is not required, and the supply adapter in which the 135 film patrone is mounted in advance is inserted into the film supply chamber. Only 135 films can be loaded with the same ease as loading 120, 220 films normally.

Further, since the rewinding adapter is provided with the tightening means for holding the rewinding member by being attached to the rewinding member on the medium format camera side and rotating in the rewinding direction, the rewinding member is provided. Can be made smaller so that it does not protrude from the bottom of the camera body. This gives 13
5 Even if the rewinding knob rotates when using film, there is no danger that the rewinding knob will come into contact with the hand or the base plate to prevent the winding operation, and the operability can be greatly improved during rewinding. ..

[Brief description of drawings]

FIG. 1 is a perspective view showing the external appearance of an embodiment of the present invention together with a 135 film cartridge.

FIG. 2 is a side view of the same.

FIG. 3 is an exploded perspective view showing the structure of the rewinding adapter.

FIG. 4 is a sectional view showing a state in which the rewinding adapter is also mounted on the rewinding knob.

FIG. 5 is a perspective view showing the outer appearance of a film winding shaft for a 135 film.

FIG. 6 is a cross-sectional view of relevant parts showing a state in which the film winding shaft is also attached to the camera body.

FIG. 7 is a sectional view of relevant parts, showing the state at the time of rewinding the film.

FIG. 8 is an explanatory view showing the action of the clutch spring of the same.

FIG. 9 is an explanatory diagram showing a 135 film screen frame adapter together with a film pressure plate and a screen frame on the camera body side.

FIG. 10 is a sectional view of an essential part showing the mounted state of the same.

FIG. 11 is a cross-sectional view showing an outline of a loaded state of 135 films.

FIG. 12 is a perspective view showing a film loading section with the back cover opened of the medium format camera embodying the present invention.

[Explanation of symbols]

1 Camera Body 1a Film Supply Room 1b Screen Frame 1c Film Winding Room 2 Counter Roller 3 Film Press Plate 4 Back Lid 5, 6, 8
Spool bearing 9 Winding shaft 10 Supply adapter 11 Holding frame 12, 16
Shaft coupling 14 Auxiliary frame 20 Rewinding adapter 21 Outer cylinder 25 Tightening lever 30 Winding adapter 31 Drive hub 32 Drive shaft 33 Winding spool 35 Rod 36 Roller support frame 37 Pressing roller 38 Pressing spring 39 Clutch spring 40 Screen frame adapter 41 Adapter Body 42 Wing P 135 Film Patrone

Claims (2)

[Claims] 1. A non-replaceable film back 120, 220
In order to use 135 film in a medium format camera using film, a supply adapter for 135 film in a medium format camera in which one of a pair of spool bearings in the film supply chamber is used as a rewinding member of the 135 film. There is provided a pair of shaft couplings that respectively support both sides of the Patrone winding shaft of the 135 film, and a U-shaped holding frame that makes the pair of shaft couplings face each other at a predetermined interval. When the frame is inserted into the film supply chamber, the shaft joint on the side of the pair of shaft joints facing the rewinding member is rotatable around the holding frame, and the patrone winding shaft is rotated through the shaft joint. A supply adapter for 135 film in a medium format camera, characterized in that it can be connected to a rewinding member. 2. A medium-size camera equipped with the 135 film supply adapter according to claim 1, wherein the tightening means holds the rewind member by being attached to the rewind member and rotating in the rewind direction. A rewind adapter for 135 film in a medium format camera, which is provided with.