Camera film fixed-length cutting equipment

Abstract

The utility model discloses film fixed-length cutting equipment for a camera, which can realize automatic fixed-length cutting of a film and improve the cutting efficiency and quality. The film fixed-length cutting equipment for the camera comprises a machine table, a punching die, an input gear, a film disc and a control device. The stamping die is installed on the machine table, and a film channel is arranged in the stamping die. A punching cutter is arranged in the film channel, and the punching cutter executes a cutting action so as to cut the film entering the film channel; a waste discharging opening is formed in the position, corresponding to the punching cutter, of the lower wall of the film channel. The input gear and the film disc are arranged at the inlet end of the film channel, and a plurality of convex teeth are uniformly arranged on the circumferential surface of the input gear and used for clamping through holes in the side edge of a film so as to feed the film of the film disc into the film channel and continuously push the film to advance; the control device is electrically connected with the punching cutter and a driving device of the input gear.

Description

Technical Field

[0001] The utility model relates to the technical field of film cutting, in particular to a fixed-length cutting device for film used in cameras. Background Art

[0002] Film, also known as photofilm, is a traditional photosensitive material used in photography and movie shooting. It consists of a plastic or cellulose acetate base, and a photosensitive emulsion layer coated on the base. The photosensitive emulsion layer contains light-sensitive silver halide crystals that are able to form images after exposure and subsequent chemical processing. With the development of digital photography technology, the use of film has gradually decreased, but many photographers still choose to use film because of its ability to provide unique image effects and textures. In addition, film still maintains its importance in filmmaking and some special photography fields.

[0003] During production, film is usually processed into a length of more than 100 meters and rolled up, and then cut into appropriate lengths according to product design requirements, and then loaded into film boxes to obtain packaged film products. In the prior art, the film is usually cut to a fixed length by manually measuring the appropriate length and cutting. Since the film itself is sensitive to light, the cutting process can only be carried out in a darkroom, which has the disadvantage of unclear vision. If the whole process is manually operated, errors are likely to occur, resulting in waste of film, and the labor intensity is extremely high for the operators, and it is also easy to damage their eyesight. For this reason, the industry hopes to achieve automatic fixed-length cutting of film, that is, cutting the film by mechanical control. Utility Model Content

[0004] The utility model aims to provide a fixed-length cutting device for film for a camera, which solves the problems existing in the prior art, can realize automatic fixed-length cutting of film, and improve cutting efficiency and quality.

[0005] In order to achieve the above purpose, the solution of the utility model is:

[0006] A fixed-length cutting device for camera film comprises a machine platform, a punching die, an input gear, a film disc and a control device; the punching die is installed on the machine platform, and a film channel is arranged therein; a punching knife is arranged in the film channel, and the punching knife performs a cutting action to cut the film entering the film channel; a waste discharge port is arranged on the lower wall of the film channel corresponding to the position of the punching knife; the input gear and the film disc are both arranged at the inlet end of the film channel, and a plurality of convex teeth are evenly arranged on the circumference of the input gear for engaging with the perforations on the side of the film to feed the film on the film disc into the film channel and continuously push the film forward; the control device is electrically connected to the driving devices of the punching knife and the input gear respectively.

[0007] The upper wall of the film passage is provided with a movable passage for the punching knife to telescope and cooperate with.

[0008] Preferably, the film passage is divided into a plurality of sections in the transverse direction, and the end of each section of the film passage is provided with a chamfer.

[0009] The upper wall and the lower wall of the film passage are both recessed to form a concave portion.

[0010] A waste bin is arranged below the machine platform, and the waste bin is opposite to the waste discharge port.

[0011] A tensioning mechanism is arranged between the input gear and the film disc, and the tensioning mechanism includes a first fixed pulley, a tension wheel and a second fixed pulley arranged in sequence along the advancing direction of the film; the tension wheel is installed above the two pulleys through a spring, and the film output by the film disc passes around the first fixed pulley, the tension wheel and the second fixed pulley in sequence and engages with the input gear.

[0012] The camera film fixed-length cutting device also includes a pair of upper and lower output rollers arranged at the outlet end of the film passage, and the output rollers abut against the upper and lower surfaces of the film side.

[0013] The camera film fixed-length cutting device also includes a sensing mechanism arranged at the inlet and / or outlet of the film channel, which is used to detect the advancing length of the film; the sensing mechanism includes a pair of zero infrared sensors arranged at the inlet of the film channel, a pair of inlet infrared sensors, and a pair of outlet infrared sensors arranged at the outlet of the film channel, and the infrared sensors are composed of an infrared transmitter and an infrared receiver; the input gear is provided with a light hole for infrared light to pass through.

[0014] Preferably, a movably opened and closed flip cover is installed above the input gear, and the flip cover limits the film roll to fit on the circumference of the input gear.

[0015] The punching knife includes a first cutting edge and a second cutting edge arranged front and back, wherein the first cutting edge matches the shape of the tail of the film product, and the second cutting edge matches the shape of the head of the film product.

[0016] After adopting the above technical solution, the utility model has the following technical effects:

[0017] The utility model can realize fixed-length conveying of film by automatically controlling the rotation number of the input gear and the punching frequency of the punching knife through the control device, so that the film is punched by the punching knife after moving a certain length under the punching knife, thereby realizing fixed-length cutting of the film, and the cut film is rolled up by the film product winding device; when the utility model is working, except that the head of the film needs to be manually loaded onto the convex teeth of the input gear, the whole process is mechanically controlled and automatically executed, and the efficiency and quality of film cutting are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional diagram of a specific embodiment of the utility model;

[0019] Figure 2 for Figure 1 The enlarged view of point A in the middle (covered state);

[0020] Figure 3 for Figure 1 The enlarged view of point A in the middle (open state);

[0021] Figure 4 A cross-sectional view of a specific embodiment of the utility model Figure 1 ;

[0022] Figure 5 for Figure 4 The enlarged view of point B in the middle;

[0023] Figure 6 A cross-sectional view of a specific embodiment of the utility model Figure 2 ;

[0024] Figure 7 for Figure 6 Enlarged view of point C in the middle;

[0025] Figure 8 A three-dimensional diagram of a punching knife according to a specific embodiment of the utility model;

[0026] Description of Figure Numbers:

[0027] 1-machine table; 2-die; 21-film channel; 211-waste outlet; 212-movable channel; 213-chamfer; 214-recess; 22-punching knife; 3-input gear; 31-convex tooth; 32-light hole; 4-film disc; 5-control device; 6-waste bin; 7-first fixed pulley; 8-tension wheel; 9-second fixed pulley; 10-spring; 20-output roller; 30-zero infrared sensor; 40-input infrared sensor; 50-output infrared sensor; 60-flip cover; 70-cylinder;

[0028] a-film; b-perforation. DETAILED DESCRIPTION

[0029] In order to further explain the technical solution of the present invention, the present invention is described in detail below through specific embodiments.

[0030] refer to Figures 1 to 8 As shown, the utility model discloses a fixed-length cutting device for camera film, comprising a machine platform 1, a die 2, an input gear 3, a film disc 4 and a control device 5;

[0031] The die 2 is mounted on the machine table 1, and a film passage 21 is arranged therein; a punching knife 22 is arranged in the film passage 21, and the punching knife 22 performs a cutting action to cut the film a entering the film passage 21 to obtain the head and tail shapes of the film product (the punching knife 22 also has a blade that matches the head and tail shapes of the product); a waste material discharge port 211 is arranged at the position of the punching knife 22 on the lower wall of the film passage 21, which is used to discharge the waste material cut by the punching knife 22 out of the die 2;

[0032] The input gear 3 and the film disc 4 are both arranged at the inlet end of the film passage 21. The peripheral surface of the input gear 3 is evenly provided with a plurality of convex teeth 31, which are used to engage with the perforations b on the side of the film a to feed the film on the film disc 4 into the film passage 21 and continuously push the film a forward (this feeding method is the same as the film feeding method in the camera); the outlet end of the film passage 21 can be connected to the winding device of the film product, which is not shown in the present utility model;

[0033] The control device 5 is electrically connected to the driving devices of the punching blade 22 and the input gear 3 respectively, and is used to set and control the working states of the punching blade 22 and the input gear 3 .

[0034] Through the above scheme, the utility model automatically controls the number of rotations of the input gear 3 and the punching frequency of the punching knife 22 through the control device 5, so that the fixed-length conveying of the film a can be achieved, so that the film a moves a certain length below the punching knife 22 and is punched by the punching knife 22, thereby achieving the fixed-length cutting of the film a, and the cut film is taken away by the film product winding device; when the utility model is working, except that the head of the film a needs to be manually loaded onto the convex tooth 31 of the input gear 3, the whole process is mechanically controlled and automatically executed, and the efficiency and quality of film cutting are improved.

[0035] Specific embodiments of the present utility model are shown below.

[0036] The upper wall of the film passage 21 is provided with an active passage 212 for the punching knife 22 to telescope. When the punching knife 22 is retracted upward into the active passage 212, the film a is not blocked from passing under the punching knife 22; when the punching knife 22 extends downward out of the active passage 212, the film a is cut.

[0037] Furthermore, since the die 2 and other devices / components are assembled from multiple parts, the above-mentioned film channel 21 is divided into several sections along the horizontal direction; at the same time, in order to prevent the head of the curled film a caused by winding on the film disc 4 from being stuck at the connection between the adjacent sections of the film channel 21, the end of each section of the film channel 21 is provided with a chamfer 213, so that the film a can enter the next section of the film channel 21 more smoothly to avoid being stuck.

[0038] The upper wall and the lower wall of the film passage 21 are both recessed to form a recess 214. The recess 214 can leave a large enough space to prevent the middle part of the film a from contacting the inner wall of the film passage 21 and scratching the film a. The waste outlet 211 and the movable 212 are respectively formed at the bottom of the recess 214 of the lower wall and the upper wall.

[0039] The punching knife 22 includes a first blade 221 and a second blade 222, the first blade 221 matches the shape of the tail of the film product, and the second blade 222 matches the shape of the head of the film product. When the film A is cut into the target length, the header and tail of the film can be formed at the same time, all in one step.

[0040] A waste bin 6 is disposed below the machine 1 . The waste bin 6 is opposite to the waste outlet 211 and is used to receive the waste discharged from the waste outlet 211 .

[0041] The input gears 3 are coaxially provided with two of them, which are respectively used to engage with the perforations b on both sides of the film a, so as to realize the smooth forward conveyance of the film a.

[0042] A tensioning mechanism is provided between the input gear 3 and the film disc 4, and the tensioning mechanism comprises a first fixed pulley 7, a tension wheel 8, and a second fixed pulley 9 which are arranged in sequence along the advancing direction of the film a; the tension wheel 8 is installed above the two pulleys through a spring 10, and the film a outputted from the film disc 4 passes through the first fixed pulley 7, the tension wheel 8, and the second fixed pulley 9 in sequence and engages with the input gear 3. The film a can be tightened by the elastic tensioning mechanism, so that the film a can be conveyed more smoothly.

[0043] The utility model also includes a pair of upper and lower output rollers 20 arranged at the end of the film channel 21, the output rollers 20 abut against the upper and lower surfaces of the side of the film a, and after part of the film a is cut by the punching knife 22, the output rollers 20 continue to feed the cut film forward.

[0044] The utility model also includes a sensor mechanism arranged at the inlet and / or outlet of the film passage 21 for detecting the advancing length (or distance) of the film a. By arranging the sensor mechanism, it can cooperate with the control device 5 to achieve more accurate fixed-length cutting of the film.

[0045] Furthermore, the above-mentioned sensing mechanism includes a pair of zeroing infrared sensors 30, a pair of inlet infrared sensors 40, and a pair of outlet infrared sensors 50 arranged at the outlet of the film passage 21, and the infrared sensors are composed of an infrared transmitter and an infrared receiver; the input gear 3 is provided with a light hole 32 for infrared light to pass through. When the infrared light emitted by the transmitter of the zeroing infrared sensor 30 to its receiver can pass through the light hole 32 (that is, the light hole 32 is opposite to the transmitter and the receiver at the same time), the input gear 3 is in the initial position and the zeroing is completed; when the film a continues to advance, the inlet infrared sensor 40 and the outlet infrared sensor 50 can count the perforations b of the film a; at the same time, since the spacing of the perforations b is the same, the advance length of the film a can be accurately detected by the inlet infrared sensor 40 and the outlet infrared sensor 50, and the calibration of the initial position can be realized (see the calibration method below for details).

[0046] Secondly, a movable flip cover 60 is installed above the input gear 3. The flip cover 60 can be opened to facilitate the head of the film a to be inserted into the convex teeth 31 of the input gear 3. After that, the flip cover 60 is closed, and the film a can be limitedly matched on the peripheral surface of the input gear 3 to prevent it from being separated from the convex teeth 31, ensuring that the input gear 3 can continuously transport the film a. In this embodiment, the transmitter of the input-end infrared sensor 40 is installed in the flip cover 60.

[0047] The driving device of the punching knife 22 is a cylinder 70, and the driving device of the input gear 3 (output gear 20) is a motor (located on the back of the die 2, not shown in the figure).

[0048] The control device 5 may be a display screen + key panel, a touch screen or any other device integrating control and display.

[0049] In order to solve the problem of misoperation when loading film due to unclear vision in a darkroom (the first perforation b at the head of the film a cannot be accurately put on the convex tooth 31 at the top of the input gear 3, which may cause the length of the film cut for the first time to be non-compliant), and prevent the operator from installing the wrong hole without being able to find it, the utility model also discloses a calibration method for the above-mentioned machine-used film fixed-length cutting device, comprising the following steps:

[0050] Step 1, clamp any perforation b at the head of film a onto the convex tooth 31 at the top of the input gear 3, first rotate the input gear 3 to a state where the light of the zero infrared sensor 30 can pass through the light-transmitting hole 32, and then advance the length of N perforations b each time, and cyclically advance the film a, wherein N is an integer greater than 1; while the input gear 3 advances the film a, the input infrared sensor 40 and the output infrared sensor 50 (by counting the number of perforations b passed) continuously count the forward length of the film a; when the output infrared sensor 50 detects the perforation b, the input gear 3 stops rotating and records the number of holes X detected by the output infrared sensor 50;

[0051] Step 2, control the input gear 3 to rotate in the opposite direction, so that the film a is retracted until the head of the film a is aligned with the punching knife 22, and the number of holes of the film a retracted is Z=X+Y, where Y is the number of holes corresponding to the distance between the punching knife 22 and the output infrared sensor 50.

[0052] The above embodiments and drawings do not limit the product form and style of the present utility model. Any appropriate changes or modifications made by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the present utility model.

Claims

1. A device for cutting film to length for cameras, characterized in that: It includes the machine table, die, input gear, film reel and control device; The punching die is mounted on the machine platform, and a film passage is arranged therein; a punching knife is arranged in the film passage, and the punching knife performs a cutting action to cut the film entering the film passage; a waste discharge port is arranged on the lower wall of the film passage corresponding to the position of the punching knife; The input gear and the film disc are both arranged at the inlet end of the film passage, and a plurality of convex teeth are evenly arranged on the circumference of the input gear for engaging with the perforations on the side of the film to feed the film on the film disc into the film passage and continuously push the film forward; The control device is electrically connected to the punching blade and the driving device of the input gear respectively.

2. The camera film cut-to-length device according to claim 1, characterized in that: The upper wall of the film passage is provided with a movable passage for the punching knife to telescope and cooperate with.

3. The camera film cut-to-length device as claimed in claim 2, characterized in that: The film passage is divided into several sections along the transverse direction, and the end of each section of the film passage is provided with a chamfer.

4. The camera film cut-to-length device as claimed in claim 1, characterized in that: The upper wall and the lower wall of the film passage are both recessed to form a concave portion.

5. The camera film cut-to-length device as claimed in claim 1, characterized in that: A waste bin is arranged below the machine platform, and the waste bin is opposite to the waste discharge port.

6. The camera film cut-to-length device as claimed in claim 1, characterized in that: A tensioning mechanism is arranged between the input gear and the film disc, and the tensioning mechanism includes a first fixed pulley, a tension wheel and a second fixed pulley arranged in sequence along the advancing direction of the film; the tension wheel is installed above the two pulleys through a spring, and the film output by the film disc passes around the first fixed pulley, the tension wheel and the second fixed pulley in sequence and engages with the input gear.

7. The camera film cut-to-length device as claimed in claim 1, characterized in that: It also includes a pair of output rollers arranged up and down at the outlet end of the film passage, wherein the output rollers abut against the upper and lower surfaces of the film side.

8. The camera film cut-to-length device according to claim 1, characterized in that: It also includes a sensing mechanism arranged at the inlet and / or outlet of the film passage, which is used to detect the advancing length of the film; the sensing mechanism includes a pair of zero infrared sensors arranged at the inlet of the film passage, a pair of inlet infrared sensors, and a pair of outlet infrared sensors arranged at the outlet of the film passage, and the infrared sensors are composed of an infrared transmitter and an infrared receiver; the input gear is provided with a light hole for infrared light to pass through.

9. The camera film cut-to-length device as claimed in claim 8, characterized in that: A flip cover that can be opened and closed movably is installed above the input gear, and the flip cover limits the film to fit on the circumference of the input gear.

10. The camera film cut-to-length device according to claim 1, characterized in that: The punching knife includes a first blade and a second blade arranged front and back, wherein the first blade matches the shape of the tail of the film product, and the second blade matches the shape of the head of the film product.

Images