CN2192043Y - Wide film intermittent conveying and locating device - Google Patents

Abstract

The utility model relates to a device for motion picture technique, particularly an intermittent transporting and positioning device for wide film. The utility model is mainly used in motion picture cameras with wide film ranging from 65 to 70 millimeters. The utility model is composed of a guide sheet plate group, two intermittent film transporting and positioning mechanisms with multiple connecting rods, and a swinging guide rod mechanism, wherein, the guide sheet plate group forms a sheet groove, the intermittent film transporting and positioning mechanisms which are symmetrical to the longitudinal symmetrical center lines of the film are respectively corresponding to the edges of two sheet holes of the film and are symmetrically arranged, and the swinging guide rod mechanism which plays the role of mechanism balance is positioned in the symmetry plane of the two intermittent film transporting and positioning mechanisms. The balance mechanism is linked with the intermittent film transporting and positioning mechanisms through the drive of a pair of helical gears. The utility model has the advantages of little vibration, easy processed parts, long period of stable work, etc.

Description

Wide film intermittent conveying and locating device

The utility model relates to motion picture technique equipment, is wide film intermittent film transport and locating device about a kind of 65-70 of being mainly used in millimeter wide film motion picture camera.

Along with the development that big screen, big visual field film show, the movie film that adopts 65-70 mm wide film and have a big picture is used widely.Compare with 35 millimeters films, adopting the direct photographic processes of wide cut egative film to turn out movies under the condition of copy, wide film process has that information capacity is big, picture is broad, the full characteristics such as close of image definition, levels are rich, color.

Similar to detent mechanism to the intermittent film transport of 35 millimeters kinematographs, the intermittent film transport of 65-70 millimeter kinematograph and detent mechanism are also finished the intermittent delivery film and are realized pinpoint function of its cycle; But under the condition of employing broad-amplitude film, the flakiness ratio of film increases, and the area of captured picture may be 4-10 a times of 35 millimeters common pictures, guarantees that the accurate and stable position of film when exposure just becomes key technical problem; Along with picture apart from the increase of picture area, and the raising of the video camera frequency of operation upper limit, more strict to the requirement of the dynamic balance performance of wide film intermittent film transport and detent mechanism.

U.S. Patent application 4534630 has proposed a kind of wide film film trasport and detent mechanism of the 65-70 of being used for millimeter projector, be characterized in adopting two with the corresponding pulldown swing arm that drives by coaxial crank in film film perforation limit and two be positioned at this swing arm and can do to move back and forth by cam and spring controlled claw, pilot pin group that moves by the past complex line of cam control work and the fork of controlling by another crank that plays the balanced controls effect.Three camming movement width of cloth in above-mentioned patented claim, have been adopted altogether; As everyone knows, cam mechanism belongs to higher pair mechanism, and its specific contact pressure is bigger, has the relatively poor deficiency of other part mar proof; In addition, the manufacture process of cam profile is also more numerous and diverse.

The purpose of this utility model is that a kind of wide film intermittent film transport and detent mechanism will be provided, and it can have favorable dynamic balance property and more permanent steady operation phase based on low counter gear.

The purpose of this utility model is achieved in that the guide card plate group that forms film trap is installed on same pedestal, be symmetrical in the vertical symmetrical center line of film and connecting rod intermittent film transport and detent mechanism more than two corresponding with its two film perforations limit respectively, synchronous push-push operation, and balanced controls that are positioned at above-mentioned two mechanism's symmetrical planes.Above-mentioned each intermittent film transport and detent mechanism by one have claw, formed by modification crank rocker mechanism and hinged with it four bar groups that have pilot pin of five moving links.Above-mentioned claw is arranged in an end of above-mentioned modification crank rocker mechanism pulldown fork, and above-mentioned pilot pin is arranged in an end of above-mentioned four bar groups location shank.The claw end moves along a closed curve, and pilot pin is done to move toward complex line, and both alternately enter perforation, realizes that the intermittent delivery and the cycle of film accurately locatees.Above-mentioned balanced controls are the oscillating guidebar mechanisms that three moving links are arranged; Its main drive shaft also is the main drive shaft of this device, by a pair of gear drive, above-mentioned balanced controls and two intermittent film transports and detent mechanism interlock also keep the coupling of its motion phase: balance fork in the above-mentioned balanced controls and the pulldown fork in above-mentioned intermittent film transport and the detent mechanism have opposite all the time swaying direction.

In two intermittent film transports of above-mentioned symmetric arrangement and the detent mechanism except that the pulldown fork that directly contacts with film both sides film perforation, locate the working component such as shank, part in all the other moving links can be shared, and the plane of movement of these share components is positioned at the symmetrical plane of above-mentioned two intermittent film transports and detent mechanism.

This installs the concrete structure of each revolute pair, can select sliding bearing or rolling bearing for use according to the different operating condition.

The utility model is except that having a pair of transmission gear, and remainder is formed by linkage assembly.Each member in the linkage assembly generally is joining with lower pair, and it is little therefore to have kinematic pair pressure, and the part mar proof is good in addition, and part is easy to advantages such as processing and assurance machining precision in addition.In addition, the balanced controls connection and reasonable arrangement in the utility model, its plane of movement is positioned at the intermittent film transport of two symmetric arrangement and the symmetrical plane of detent mechanism exactly, can guarantee favorable dynamic balance property.

Principle of compositionality of the present utility model and concrete structure will describe in detail in conjunction with the following drawings one by one.

Fig. 1 is a kinematic sketch of mechanism of the present utility model.

Fig. 2 is the front view of first kind of embodiment of the present utility model.

Fig. 3 is the left view of above-mentioned first kind of embodiment.

Fig. 4 is the view along M-M direction among Fig. 3 (after promptly removing the pedestal cover plate).

Fig. 5 is the cut-open view along R-R line among Fig. 4.

Fig. 6 is the cut-open view along T-T line among Fig. 4.

Fig. 7 is the cut-open view along S-S line among Fig. 4.

Fig. 8 is the cut-open view along Q-Q line among Fig. 2.

Fig. 9 is the front view of second kind of embodiment of the present utility model.

Figure 10 is the cut-open view along L-L line among Fig. 9.

Figure 11 is the cut-open view along V-V line among Fig. 9.

Following elder generation is 1 explanation principle of compositionality of the present utility model by reference to the accompanying drawings.

The centre of gyration of corresponding this device driving shaft of N point on pedestal (1). The corresponding intermittent film transport of O point and detent mechanism driving crank (2a) and (2b) centre of gyration on pedestal (1). The length of the corresponding crank 2a of line segment OA, the length of the corresponding crank 2b of line segment OB. By the gear (7) that is connected with driving shaft and the gear (8) that is connected with crank (2a), (2b), the driving shaft take the N point as the centre of gyration is passed to driving crank (2a), (2b) with motion, makes it to rotate with the speed identical with driving shaft. The pin joint of the corresponding driving crank of A point (2a) and sliding sleeve (5). The pin joint of the corresponding driving crank of B point (2b) and connecting rod (6). Above-mentioned O, A, 3 of B are located along the same line. The pin joint of C point corresponding swing sliding sleeve (4) and pedestal (1). Pulldown fork (3) with claw (3 ') is associated and can slides along AC line direction therein with swing sliding sleeve (4) and sliding sleeve (5) simultaneously. The pin joint of the corresponding pulldown fork of D point (3) and connecting rod (6), it also is the pin joint of small rod (13) and pulldown fork (3) simultaneously. The pin joint of the corresponding small rod of E point (13) and shift fork (14). Shift fork (14) can be around the fixed pivot (F) that is fixed on the pedestal (1) Swing. The prong of shift fork (14) is meshed with slide block (15). The pin joint of G point corresponding location shank (16) and slide block (15). With the location shank (16) of pilot pin (16 ') can be on being fixed in pedestal (1) location needle stand (19) and (20) in move as reciprocating linear. On the gear (7) that is connected mutually with this device driving shaft, make to have crank (9), the length of the corresponding crank of line segment NK (9). The pin joint of the corresponding crank of K point (9) and sliding sleeve (10). Balance fork (11) is associated with sliding sleeve (10) and therein slippage. The pin joint of the corresponding balance fork of P point (11) and pedestal (1). Be fixedly connected with a counterweight (12) at balance fork (11).

When the driving shaft take N as the centre of gyration rotated in the counterclockwise direction, the crank take O as the centre of gyration (2a), (2b) rotated with identical speed along clockwise direction. At this moment the end points that is positioned at the claw (3 ') of pulldown fork (3) one ends moves along an approximate oval-shaped closed curve of prolate. Claw (3 ') is meshed and drives film with the film that is positioned at guide plate sheet plate (17), (18) film trap that forms periodically and moves a picture distance. Be complementary with the motion of claw (3 '), location shank (16) is finished reciprocating linear and is moved, and makes the pilot pin (16 ') of one end enter periodically the film film perforation, with its accurate location. Meanwhile, the crank (9) that is connected mutually with the driving shaft of this device take N as the centre of gyration drives balance fork (11) by sliding sleeve (10) and finishes and the rightabout swing of pulldown fork (3) around fixed pivot P.

Below in conjunction with accompanying drawing 2-7 the concrete structure of first kind of embodiment of the present utility model is described in detail.

According to the difference of film traffic direction in the video camera, the pedestal of horizontal or vertical placement (1) is this to be installed install all bases of part in addition.Said base (1) is made up of base plate (1a), cover plate (1b), clamping plate (1c) and pillar (1d) four parts, utilize screw (57) that they are fused, back guide card plate (18) is installed between pedestal bottom plate (1a) and cover plate (1b), it is corresponding with the preceding guide card plate on being installed in the video camera body, the common film trap that forms, back guide card plate (18) is made up of epimere (18a) and hypomere (18b) two parts.The axis of rotation that back guide card plate hypomere (18b) has with swing sliding sleeve (4) is the face of cylinder section of center line.Utilize screw (56) that back guide card plate epimere (18a) and hypomere (18b) are fixed on the pedestal (1).Between above-mentioned back guide card plate epimere (18a) and hypomere (18b), film pressure plate (21) is housed.Utilize pressing plate (51), (52) to limit the position of film pressure plate (21) and guarantee that it only can have micro-move place along the video camera optical axis direction.By the spring leaf (22) that is installed on pedestal bottom plate (1a) and the cover plate (1b), film pressure plate (21) relies on preceding guide card plate one side all the time.

The main drive shaft of present embodiment (31) is installed in the bearing seat (33) by two rolling bearings (34).This bearing seat (33) is connected by screw (62) and pedestal bottom plate (1a).End at main drive shaft (31) utilizes key (53) to be fixed with shaft joint dish (32), and the key (32a) of projection is arranged on its side.Utilize key (54) to be fixed with the crank disc (9 ') that a crank (9) and spiral gear (7) are contained in one at the other end of main drive shaft (31).Above-mentioned crank disc (9 ') is hinged by rolling bearing (24) with sliding sleeve (10).The balance fork (11) that is connected with fork pedestal (35), fork axle (36) is housed in sliding sleeve (10).Fork axle (36) can freely rotate in the axle sleeve (37) in being press-fit in fork axle bed (38).Utilize screw (58) that fork axle bed (38) is anchored on the pedestal bottom plate (1a).When main drive shaft (31) rotates,, make balance fork (11) make reciprocally swinging around the axis of fork axle bed (38) by crank (9), sliding sleeve (10).Utilize screw (47) can on balance fork (11), fix a counterweight (12).

The excentric shaft (2p) consistent with crank (2b) made to have in stage casing at crank axle (2).Utilize key (41) and major part screw (42) at the two ends of crank axle (2), fixedly have the crank disc (2 ') of crank (2a) respectively and crank (2a) and spiral gear (8) are contained in crank disc (2 ") of one.By being installed on the rolling bearing (40) in the pedestal clamping plate (1c), two crank discs (2 '), (2 ") can freely be rotated around same axis of rotation.The rotation of main drive shaft (31) is passed to crank axle (2) by spiral gear (7) and spiral gear (8).Crank disc (2 '), (the established angle position of 2 ") on crank axle (2) must guarantee that the crank (2a) of both sides has identical phase place, and promptly the revolution axle axis of both sides sliding sleeve (5) should be on same straight line.By rolling bearing (39), sliding sleeve (5) and crank disc (2 '), (2 ") are hinged.Each fixes a swing sleeve base (43) that is press-fitted sliding shaft sleeve (44) by screw (59) on pedestal bottom plate (1a) and cover plate (1b).The axle of swing sliding sleeve (4) can freely be rotated in above-mentioned swing sleeve base (43).The hole precision-fit of the cylinder guide of pulldown fork (3) and sliding sleeve (5), swing sliding sleeve (4) also can reciprocatingly slide therein.Excentric shaft (2p) on the crank axle (2) is hinged by rolling bearing (48) and shared connecting rod (6).The forks arm (6a) of the oriented symmetria bilateralis expansion of the front end of connecting rod (6).Hole precision-fit on bearing pin (46) and the forks arm (6a) is hinged connecting rod (6) and pulldown connecting rod (3).Like this, when crank axle (2) rotated, the claw (3 ') of pulldown fork (3) front end was promptly finished plane curve movement, and entered film trap periodically and drive film and move a picture distance.

In order to realize the accurate location of film in repose period, pulldown fork (3) also drives by small rod (13), shift fork (14), the align member group that slide block (15) and location shank (16) are formed, one end of small rod (13) is hinged by bearing pin (46) and pulldown fork (3), and its other end then is hinged by bearing pin (49) and shift fork (14).The axle (45) that is contained in the borehole jack at shift fork (14) middle part goes up and can center on its axis free swing.Utilize screw (60) that axle (45) is individually fixed on pedestal bottom plate (1a) and the cover plate (1b).Location shank (16) is hinged by bearing pin (50) and slide block (15).Two sides of slide block (15) and the prong precision-fit of shift fork (14) also can be free to slide therein.Be free to slide in two the location needle stands (19), (20) that location shank (16) can be on being installed on pilot pin seat board (30).Utilize screw (61) that above-mentioned pilot pin seat board (30) is anchored on pedestal bottom plate (1a) and the cover plate (1b).Boss face on the facet of bearing pin (50) one ends and the pilot pin seat board (30) is close to mutually, does not produce any deflection when moving back and forth to guarantee location shank (16).Like this, when crank axle (2) rotated, the pilot pin (16 ') that is positioned at location shank (16) one ends promptly entered perforation periodically, finishes its positioning function.

Can guarantee to have identical movement locus by the position of accurate adjusting two swings sleeve base (43) on pedestal bottom plate (1a) and cover plate (1b) with film corresponding two claws in two film perforation limits (3 ').By the position of axle (45) on pedestal bottom plate (1a) and cover plate (1b) that accurate adjusting matches with shift fork (14), can guarantee with the motion consistance of film corresponding two pilot pins in two film perforation limits (16 ') and with the good motion match relation of claw (3 ').

In order to guarantee to be easy to when the load with the film film trap of packing into, present embodiment has adopted the following scheme of rotating whole pedestal (1): the guide card plate is fixed on the video camera body before the film trap, and then guide card plate (18) then is fixed on the pedestal (1) of present embodiment.Do to have hole (1k) with body upper spindle precision-fit at an end of pedestal (1), whole pedestal can the axle on body rotate.Only need during load in the counterclockwise direction that turn spanner (23) makes it to leave its locked position under the effect of spring (55), whole pedestal is turn-off along clockwise direction, thereby the film trap gap is increased, and is convenient to the load operation.

Knob (25) is housed on cover plate (1b), when needs during with slow with one's hands fast rotary machine, only need knob (25) is depressed and rotation simultaneously, at this moment axostylus axostyle (26) and the gear (27) that is connected with knob (25) also moves down along the axis of bearing (29), is meshing with each other until gear (27) and gear (8).Once operator's hand leaves knob (25), under the effect of spring (28), gear (27) is automatic reposition, breaks away from engagement with gear (8).

Below in conjunction with accompanying drawing 9-11 the differential section that second kind of embodiment of the present utility model is different from first kind of embodiment is replenished description.

The difference that second kind of embodiment is different from first kind of embodiment is mainly reflected in the concrete structure aspect of detent mechanism.Except that connecting rod (6), realize the bearing pin (46) that pulldown fork (3) and connecting rod (6) are hinged, small rod (13), shift fork (14), slide block (15) and the bearing pin (50) that matches with two location shanks (16) all are that two intermittent film transports and detent mechanism are shared, and the plane of movement of these members all is positioned at the symmetrical plane of above-mentioned two mechanisms.

One end of small rod (13) is hinged by bearing pin (46) and two pulldown forks (3), and its other end then is hinged by bearing pin (49) and shift fork (14).The axle (45) that is contained in the borehole jack at shift fork (14) middle part goes up and can center on its axis free swing.The two ends of axle (45) are fixed in the upper shift fork seat (63).The cylinder guide of upper shift fork seat (63) by its lower end with set aside forked standard (64) close fit, both slippages mutually within the specific limits.Utilize screw (65) to make to set aside forked standard (64) and be fixed on the pedestal (1).Utilize screw (66) lockable upper shift fork seat (63) to set aside the position of forked standard (64) relatively.Two location shanks (16) are hinged by bearing pin (50) and slide block (15).Two sides of slide block (15) and the prong precision-fit of shift fork (14) also can be free to slide therein.Be free to slide in two the location needle stands (19), (20) that each location shank (16) can be on being installed on location needle plate (30).

In order to guarantee when debuging, the possibility that the position of axle (45) has trace to regulate, at first, after unclamping screw (65), setting aside forked standard (64) can fine motion in the guide groove on the pedestal (1); Secondly, after unclamping screw (66), rotation set screw (67) can change upper shift fork seat (63) and set aside distance between forked standard (64).

Claims (3)

1, a kind of wide film intermittent film transport and locating device that is mainly used in 65-70 millimeter wide film motion picture camera, this device has the guide card plate group (18) that is installed on the pedestal (1), realize intermittent film transport claw (3 ') function, that move along a closed curve in the end and realize pilot pin (16 ') film cycle positioning function, that the past complex line of work moves, it is characterized in that:

1), has the balanced controls that many connecting rods intermittent film transport of two symmetric arrangement and push-push operation synchronously and detent mechanism and plane of movement are positioned at above-mentioned two mechanism's symmetrical planes;

2), above-mentioned two intermittent film transports are also corresponding with its two film perforations limit respectively with the vertical symmetrical center line that the plane of movement of detent mechanism is symmetrical in the interior film of film trap;

3), above-mentioned each intermittent film transport and detent mechanism all comprise one by the crank (2a) and crank (2b) that are fixed on the crank axle (2), sliding sleeve (5), swing sliding sleeve (4), the modification crank rocker mechanism that connecting rod (6) and pulldown fork (3) are formed and one hinged with it by small rod (13), shift fork (14), the four bar groups that slide block (15) and location shank (16) are formed;

(3.1) crank (2a) is located on the same line with crank (2b) and rotates around the same axis that is positioned on the pedestal (1) with same speed;

(3.2) sliding sleeve (5) is hinged with crank (2a), and the while cooperates with pulldown fork (3) and allows the latter to slide in its mating holes;

(3.3) swing sliding sleeve (4) is hinged with pedestal (1), and the while cooperates with pulldown fork (3) and allows the latter to slide in its mating holes;

(3.4) connecting rod (6) one ends and crank (2b) are hinged, and the other end and pulldown fork (3) are hinged;

(3.5) end of above-mentioned pulldown fork (3) makes to have claw (3 ');

(3.6) end of small rod (13) and pulldown fork (3) are hinged, and the pin joint of its pin joint and connecting rod (6) and pulldown fork (3) is on same straight line, and the other end of small rod (13) and shift fork (14) are hinged;

(3.7) shift fork (14) is hinged by axle (45) and pedestal (1);

(3.8) prong of shift fork (14) cooperates with slide block (15), and both can slide mutually;

(3.9) slide block (15) is hinged with location shank (16) by bearing pin (50);

(3.10) location shank (16) can slide in the location needle stand (19) on being fixed in pedestal (1), (20);

(3.11) end of location shank (16) makes to have pilot pin (16 ');

4), above-mentioned balanced controls be one by the crank (9) that is fixed on the main drive shaft (31), the oscillating guidebar mechanism that sliding sleeve (10), balance fork (11) etc. are formed;

(4.1) axis of crank (9) on pedestal (1) rotates;

(4.2) sliding sleeve (10) is hinged with crank (9), and the while cooperates with balance fork (11) and allows the latter to slide in its mating holes;

(4.3) end of balance fork (11) is hinged with the fork axle bed (38) that is fixed on the pedestal;

(4.4) on balance fork (11), be fixed with the counterweight of being convenient to adjust (12);

5), the main drive shaft of above-mentioned balanced controls (31) also is the main drive shaft of this device, by a pair of gear (7), (8), main drive shaft (31) drives crank axle (2), and realize the interlock of balanced controls and two intermittent film transports and detent mechanism and keep the coupling of its motion phase: the swaying direction of balance fork (11) and pulldown fork (3) is opposite all the time.

2, according to the described device of claim 1, it is characterized in that in two intermittent film transports and detent mechanism of symmetric arrangement, except that pulldown fork (3) that directly contacts and location shank working components such as (16) with film both sides film perforation, part in all the other moving links can be shared, and the plane of movement of these share components is positioned at the symmetrical plane of above-mentioned intermittent film transport and detent mechanism.

3,, it is characterized in that the concrete structure of each revolute pair can be selected sliding bearing or rolling bearing for use according to the different operating condition according to the described device of claim 1.

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