JPS61214999A - Film perforator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a film punching machine that continuously punches perforations in a film.

[Conventional technology]

1 shows a conventional film punching machine in FIGS. 5 to 7, 1 is a punching machine main body, and a ternary reel 2 and a film a pulled out from the primary reel 2 are perforated by t&<f. Hole/hole part 3 and punched film a
A feeding mechanism 4 and a winding rule 5 are provided. As shown in FIG. 6, the perforation tool section 3 is provided with a ram 8 which is movable up and down and has four pairs of pilots 6 on the downstream side in the film running direction and four pairs of punches 7 arranged at equal intervals on the upstream side. A die 10 having eight pairs of holes 9 into which the pilots 6 and punches 7 are inserted is fixed at the bottom, and by vertical movement of the ram 8, a number of holes corresponding to the number of punches 7 (four pairs) are formed on the film a passing between these holes. The perforations are punched out at the same time.

The film a punched out by the punching tool part 3 is fed by the feed mechanism 4 provided on the downstream side by an amount equivalent to the punching amount, and then the punch 7
Apply a new side of the film directly below. Then, a new perforation is punched out on this surface by the next operation of the ram 8, but prior to this, the pilot 6 is inserted into the previously punched perforation, and a new perforation is punched out with the previously punched perforation. It is now possible to correctly connect the par 2 openings. The feeding mechanism 4 that feeds the film in conjunction with the punching operation of the ram 8 is shown in FIG. 7A.
As shown in B, cam grooves 13a and 13b are formed on the periphery and surface of a disk body 13, which is fixed to a main shaft 12 that rotates in conjunction with a drive source 11 and that operates the ram 8 once with one rotation.
The proximal end is engaged with the cam groove L3a, and the distal end is connected to the fulcrum P.
A shuttle 15 is attached to the tip of the lever 14, which swings vertically around
Attach the shuttle 15 again. The proximal end is engaged with the cam groove 13b, and the distal end is also connected to the distal end of a second lever 16 that swings in the running direction of the film a about a fulcrum P'. ! The shuttle 15 moves upward, forward, downward, and backward by the cooperative operation of the second lever 16 and the first lever 14, which is swung by one rotation of the disc body 13. When ascending, the protrusions 15' arranged on the upper surface are inserted into the part ore silane punched by the punching tool part 3, the film a is fed as it moves forward, and as it descends, the protrusions 15' are pulled out from the perforation, and the movement is t & retreat. By repeating this process, the film was fed in synchronization with the punching operation of the ram 8.

However, during the square movements of the shuttle 15 such as rising, advancing, descending, and retreating, the feeding of the film a is limited to the disk body 1.
The A corner of 3 corresponds to 90°, and the necessary length of feed must be performed at this rotation angle, and when the operation of the ram 8 is increased and the film feeding speed is increased accordingly.

For example, when operating an existing machine at 1.5 times the rotation speed,
Maximum film speed is 165 times, maximum film acceleration is 2
．． The inertial force of each part was twice as large, and this caused problems such as abnormal film feeding accuracy, increased mechanical vibration, and the occurrence of scratches, which became a bottleneck in improving performance.

[Purpose of the invention]

In view of the above points, it is an object of the present invention to provide a high-capacity film perforation machine with less mechanical vibration, improved film feeding accuracy, and no scratches.

[Structure of the invention]

In order to achieve the above object, the present invention provides a cam mechanism such as a parallel cam mechanism in the drive system of the ram of the punching tool and the drive system of the film feeding sprocket.
Even if the number of punches is increased compared to the current number, sufficient feed amount can be secured.

The structure is such that the maximum film speed can be kept below the current level and the maximum acceleration of the film can be reduced. Note 1
In the present invention, the parallel cam mechanism refers to an index mechanism in which the input shaft and the output shaft are parallel, and the barrel cam mechanism and roller cam mechanism refer to those in which the input shaft and the output shaft are perpendicular to each other.
Among these mechanisms, one in which the cam follower is installed parallel to the output shaft is called a barrel cam mechanism.

On the other hand, a mechanism in which the cam follower is attached radially to the output shaft is called a roller gear cam mechanism.

(Example) Next, the present invention will be explained based on the example shown in FIGS. 1 to 4.

In the figure, reference numeral 20 indicates a ram supported by the drilling machine main body 21 so as to be vertically slidable. The ram 20 is provided with eight pairs of punches 22, and the front (film a)
Two pairs of pilots 23 are attached to the front of the vehicle in the direction of travel.

24 is a die fixedly installed below the ram 20;

The die 24 is provided with ten pairs of holes 25 that can accommodate all of the two pairs of pilots 23 and eight pairs of punches 22. In this embodiment, nine dies 24 each having ten pairs of insertion holes 25 correspond to eight pairs of punches 22 as shown in the third figure.
4a and Gui single body 24b corresponding to 2 pairs of bilofts 23
Although the two parts are formed separately and then joined together, the whole part may be made into one piece.

26 is a camshaft of an inactive cam (not shown) that urges the ram 20 to descend and rise; this camshaft 26 is connected to the first
It is connected to the output shaft 27b of a parallel cam mechanism 27 via a timing belt or chain 28 as a two-to-one speed increasing system. The first parallel cam mechanism 27 is the drive source 2
The output shaft 27b is intermittently rotated by the constant speed rotation of the input shaft 27a connected to the input shaft 27a.
When rotated (240°), the output shaft 27b rotates half a rotation, and
The camshaft 26 is adjusted by the speed increasing system 28 of 1:1 so that the camshaft 26 rotates once and then stops. And when it rotates, ram 2
0 is lowered and raised by the action of an operating cam, and eight pairs of perforations are simultaneously punched into the film a passing between it and the die 24. When the input shaft 27a rotates 1/3, it is on standby for feeding the film a.

30 is a sprocket for feeding the punched film a, and the sprocket 30 is fixed to an output shaft 31b of a second parallel cam mechanism 31 as shown in the second figure. The second parallel cam mechanism 31 is an input shaft 3 connected to the drive source 29.
1a rotates at a constant speed, the output shaft 31b rotates intermittently, that is, when the input shaft 31a rotates 2/3 rotation (240''), the output shaft 3
It is adjusted so that 1b (sprocket) stops after making 1/4 turn. The rotation of the sprocket 30 starts immediately after the ram 20 moves upward from the descending point and the tip of the pilot is pulled out from the film a, and continues until the ram descends in the next operation and the tip of the pilot reaches the film a. It is supposed to be completed in time. Also, sprocket 1-
Needless to say, the number 30 has a circumferential length and a number of teeth that can feed a film length corresponding to 8 pairs of perforations in 1/4 rotation. Therefore, when the ram 20 descends, punches eight pairs of perforations in the film, and rises, the sprocket 30 rotates, advances the film a considerable amount, and then stops, which is alternately repeated. in this case.

The rotational movement of the sprocket 1-30 is caused by the action of the second parallel cam mechanism 31, etc., and by giving a modified sinusoidal curve to the acceleration curve, the maximum speed (2) and the maximum acceleration A become as shown in FIG. 4 (2). on the other hand.

Since the conventional shuttle mechanism has a cam curve as shown in FIG.

In the above embodiment, two pairs of bilofts and eight pairs of punches are shown on the lower surface of the ram 20, but the present invention is not limited to this, and two pairs of bilofts and six pairs of punches may be used. It is theoretically possible to increase the number of pairs to an extremely large extent, for example, 24 pairs or more, by adjusting the number of indexing angles of the parallel cam mechanism, etc., and determining the cam curve.

〔Effect of the invention〕

As explained above, the present invention is characterized in that a cam mechanism such as a parallel cam mechanism is interposed in the drive system of the ram of the punching tool section and the drive system of the film feeding sprocket.

Easy to connect between ram and film feeding operations.

Furthermore, the film feed is a rotational movement using a parallel cam mechanism, etc., and unlike a shuttle mechanism that repeatedly ascends, advances, descends, and retreats, it is easy to increase the speed, and even if the number of punches is increased, a sufficient amount of film feed can be secured. It is. In addition, as a result of using a parallel cam mechanism for the rotational movement of the sprocket, it is possible to make the film advance acceleration a modified sine curve, and the maximum speed and maximum acceleration can be made smaller than when using a shuttle mechanism. If you increase the speed by 1.5 times compared to the current model with 2 pairs of pilots and 8 pairs of punches, the maximum speed will remain the same as before the speed increase, and the maximum acceleration will be increased. Therefore, one mechanical vibration is reduced, feeding accuracy is improved, and the motion given to the film is less forced (
This results in a variety of excellent effects, including fewer scratches.

[Brief explanation of the drawing]

1 to 4 show an embodiment of the present invention, in which FIG. 1 is a front view of the main parts, FIG. 2 is a schematic plan view of the drive system of the ram and feed mechanism, and FIG. An enlarged view of the ram and die, Fig. 4 is a diagram showing the maximum speed and maximum acceleration of the feed sprocket, Figs. 5 to 7 show conventional examples, Fig. 5 is a front view of the whole, Fig. 6 is an enlarged view of the ram and die, No. 7
Figures A and B are a side view and a front view showing the shuttle mechanism. 20--Ram 22-Punch 23-Pilot 24-Gui 27-First parallel cam mechanism 30-Sprocket 31-Second parallel cam mechanism Patent Applicant Konishiroku Photo Industry Co., Ltd. Figure 2 Figure 3 Figure 4 (a) (b) Cycloid Mfi
Weird, strong-willed, M & Figure 5

Claims (1)

[Claims] A film punching machine characterized in that a cam mechanism such as a parallel cam mechanism, a barrel cam mechanism, or a roller gear cam mechanism is interposed in at least one of the drive system of the ram of the punching tool and the drive system of the film feeding sprocket.