JPS6339701Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for opening packaged sheets such as dental X-ray film and the like.

Generally, when designing an opening device for a packaging sheet such as a dental X-ray film, there is a problem of processing the cut-off pieces that are cut to open the barrier bag. That is, if the cut-off piece is left as it is, the cut-off piece will fly into the developing device together with the sheet film, causing various problems.

By the way, when collecting the cut pieces from the barrier bag of the sheet film held at a fixed position, it is not easy to collect the cut pieces because the direction in which the sheet film is pulled out and the direction in which the cut pieces fall are substantially the same.

Therefore, an object of the present invention is to obtain an opening device having a structure that can reliably collect the cut pieces in a fixed place.

To summarize the present invention for achieving this purpose, the present invention includes a film attachment part to which a wrapped sheet such as a film can be attached, and an end of a packaging bag for the sheet held in the film attachment part is cut. a shearing blade for opening the packaging bag, and a shearing blade provided at the rear in the direction of movement of the shearing blade so as to be able to move together with the shearing blade, and temporarily holding the cut piece of the packaging bag cut by the shearing blade. The present invention relates to an opening device for packaging films, etc., which includes a cut-off piece receiver and a collection box that accommodates the cut pieces protruded from the cut-off piece receiver.

Hereinafter, the present invention will be explained in detail with reference to embodiments shown in the drawings.

The automatic developing device to which this invention was applied is shown in Figures 1-
The unsealing device A shown in FIG. 3 and this unsealing device A
The developing device B shown in FIGS. 4 to 6 is connected to the lower part of the developing device B for developing the sheet film a.

1 to 3, an unsealing device A includes a mounting base 2 formed with a mounting opening 1 into which an exposed film wrapped in a barrier bag b, ie, a sheet film a, can be mounted. At installation port 1,
A film mounting portion 4 of the support plate 3 located at the bottom of the mounting base 2 is erected and visible. The film mounting portion 4 is formed with an opening 5 on which the sheet film a wrapped in the barrier bag b is seated.
A pressing surface 8 of a pressing plate 7 supported by a support pin 6 so as to be freely accessible to the film mounting portion 4 faces the pressing surface 8 thereof. The pressure plate 7 is biased in a direction away from the film mounting portion 4 by a compression spring 9 supported by a support pin 6. Second,
As shown in FIG. 3, there is a horizontal cam plate 10 at the lower part of one side of the mounting base 2, and the base end of a pressure plate operating lever 11 is pivotally supported on one side of this cam plate 10 by a fulcrum shaft 12. The intermediate protrusion 13 of the pressure plate operation lever 11 engages with the back surface of the pressure plate 7, so that the pressure plate 7 can be operated by the pressure plate operation lever 11. It is regulated by pins 14 placed on the board 10.

At the bottom of the cam plate 10, there is a rail 15 extending in a direction parallel to the film attachment part 4, and the wheels 17 of the movable base 16 ride on this rail 15. A movable base 16 that can reciprocate along the rail 15 includes a swinging lever 19 whose base end is pivoted to the movable base 16 by a pivot shaft 18 (FIG. 3).
A driven roller 22 that is driven by the cam groove 21 of the cam plate 10 is supported on the upper part of the post 20 erected at the tip of the cam plate 10 .

The cam groove 21 includes a front guide groove 21a and a rear guide groove 21 extending in a direction parallel to the film attachment part 4.
b. The rear end of the front guide groove 21a and the rear end portion of the rear guide groove 21b are connected to each other by an oblique retreat guide groove 21c, and the front end of the rear guide groove 21b and the front guide groove 21a
The part near the front end of is a diagonal return guide groove 21.
We will contact you by d. Therefore, when the movable base 16 reciprocates, the driven roller 22 moves in the front guide groove 21.
a, the retreat guide groove 21c, the rear guide groove 21b, and the return guide groove 21d, and the swing lever 19 swings about the pivot shaft 18 accordingly.

The post 20 has a roller 23 coaxially supported with the driven roller 22 and located in the same plane as the pressure plate operating lever 11 . Therefore, when the driven roller 22 moves in the front guide groove 21a, the roller 23 pushes the pressure plate operating lever 11 in the direction of the pressure plate 7, and a barrier bag is created between the opening 5 of the film attachment part 4 and the pressure plate 7. Fix the sheet film a wrapped in b.

A film holder 24 is provided at the lower end of the post 20, which is located directly below the opening 5 of the film mounting portion 4 when the driven roller 22 is located in the front guide groove 21a.
and fix the cutout piece receiver 25.

Further, between the film receiver 24 and the cut-off piece receiver 25 which are adjacent to each other in the moving direction of the movable base 16, there is provided an inclined shearing blade that enters directly under the opening 5 of the film mounting portion 4 when the movable base 16 moves forward. 26 is located.
This shearing blade 26 is fixed to the upper surface of the swing lever 19 by a holding plate 27 and a set screw 28. In addition,
As shown in the second and third figures, a guide groove 2 is provided on the lower surface of the support plate 3 to receive and guide the tip of the shearing blade 26.
form 9. A protruding rod 31 is provided below one side of the support plate 3 to cause the cut piece C held in the cut piece receiver 25 to fall into the collection box 30.

In FIG. 1, the unsealing device A has a manual operation lever 33 with a light-shielding box 32 that shields the mounting opening 1 of the mounting base 2 from external light. A pushing piece 34 is pushed forward to project the sheet film a from the barrier bag b. Further, a timing pulley 36 is provided on the base shaft 35 of the manual operation lever 33.
6, a timing belt 39 is wound around a timing pulley 38 of a link shaft 37. The link shaft 37 supports an operating link 40, and the other end of a driven link 41, one end of which is pivoted to the movable table 16, is connected to the distal end of the operating link 40. Therefore, with the above-described configuration, the manual operation lever 3
3 is converted into a linear reciprocating motion of the movable table 16, and synchronous movement of the manual operation lever 33 and the movable table 16 is obtained.

On the other hand, a hopper 42 for dropping the sheet film a toward the developing device B is located directly below the film mounting portion 4.
is located. A barrier bag holder 43 having an opening width L3 larger than the film width L1 and smaller than the barrier bag width L2 is located at the opening or upper end of the hopper 42. Directly below this barrier bag holder 43, sheet film a is placed from barrier bag b to sheet film a.
A pair of pull-out rollers 44 and 45 are positioned to pull out. Pinion gears 46 and 47 that mesh with each other are provided at the shaft ends of these pull-out rollers 44 and 45, and one pinion gear 47 is rotated by a reduction gear 49 driven by a drive motor 48. This drive motor 48 is controlled by a micro switch 51 which is opened and closed by a cam 50 fixed to the base shaft 35.

4 to 6, the developing device B includes a frame body having two sets of side plates 54, 55, 56, and 57 whose lower halves are immersed in a developer tank 52 and a fixer tank 53. That is, these side plates 54, 55,
56 and 57 are connected by spacers 58, 59, and 60 to form a frame shape. and the side plate 54 and the side plate 5
5 and between the side plate 56 and the side plate 57, rotary shafts 61 and 62 extending in the horizontal direction are supported, and the rotary shafts 61 and 62 have gears 63 and 6 fixed to their shaft ends.
4 allows for synchronous rotation.

On the circumferential surface of the rotating shaft 61, a large number of radial blades 65 are provided equidistantly in the circumferential direction for dropping the exposed sheet film a therebetween. A semicircular guide plate 66 surrounding the lower half of the outer circumference of the blade 65 is fixed to the inner surface of the side plate 54, and the blade 6 is guided by this guide plate 66.
The sheet film a interposed between the sheets 5 and 5 is prevented from falling off.

In order to transfer the sheet film a developed in the developer tank 52 to the fixer tank 53 through a window 67 formed in the side plate 55, the blades 65 are oriented so as to descend obliquely toward the side plate 55, and the blades 65 A protrusion 69 is fixed to the surface of the blade 65 so that the sheet film a can easily slide along the surface of the blade 65.

Also, the developed sheet film a that exited the window 67
enters the window 71 of the side plate 56 through the chute 70, is held between blades 72 provided on the circumferential surface of the rotating shaft 62, and moves along a guide plate 73 similar to the guide plate 66. Since these blades 72 are synchronized with the blades 65 as described above, the sheet film a
When falling down the chute 70, it always corresponds to the window 71.

The sheet film a, on which the image has been fixed in the fixing liquid tank 53, is taken out from the window 74 of the side plate 57. For this purpose, a triangular cam projection 75 is provided on the inner surface of the side plate 57 to engage with the end surface of the sheet film a and project it toward the window 74.
An opening 76 is formed on one side of the blade 71 to allow the cam protrusion 75 to pass therethrough.

Next, the operation of the opening device A described above with reference to FIGS. 7 to 10 will be explained.

Before the above-mentioned automatic developing device starts to be used, each part of the unsealing device A is in the positional relationship shown in FIGS. 1 to 3. First, the exposed sheet film a is inserted into the mounting opening 1 of the film mounting portion 4 until it hits the film receiver 24. After this, the manual operation lever 33
1, the driven roller 23 moves along the front guide groove 21a of the guide groove 21, and the movable base 16 starts to move forward.

As the driven roller 23 moves, the roller 23 comes into contact with the pressure plate operation lever 11, and the pressure plate operation lever 11 pivots about the fulcrum shaft 12, and the intermediate projection 13 of the pressure plate operation lever 11 causes the pressure plate 7 to move against the compression spring 9. The barrier bag b is fixed between the film mounting portion 4 and the pressure plate 7.

Next, when the movable base 16 continues forward movement, the eighth
As shown in the figure, the shearing blade 26 advances directly below the film attachment part 4, and cuts the opening of the barrier bag b with the shearing blade 26.
It is held in a cutout piece receiver 25 that moves together with the cutout piece 6.

Thereafter, due to the forward movement of the movable base 16, the driven roller 23 enters the retreat guide groove 21c, and as it moves in the retreat guide groove 21c as shown in FIG. 9
The force causes the pressure plate 7 to separate from the film mounting portion 4, releasing the fixed state of the barrier bag b. At the same time, the swing lever 19 rotates about the pivot shaft 18 due to the inclination of the retreat guide groove 21c, and the film receiver 24, shear blade 26, and cut-off piece receiver 25 retreat from the film mounting portion 4. . For this reason, the sheet film a fixed between the film attachment part 4 and the pressure plate 7 falls slightly due to gravity, and the barrier bag b
Both ends thereof are received in the barrier bag receiver 43. At the same time, the micro switch 51 detects the pivoting of the manual operation lever 33, and this micro switch 5
1, the pull-out rollers 44 and 45 start rotating.

Due to the subsequent forward movement of the movable base 16, the driven roller 2
3 moves into the rear guide groove 21b of the cam groove 21,
The mounting opening 1 of the mounting base 2 is covered with a light shielding box 32 as shown in the 10th figure. For this reason, the push piece 3 of the light shielding box 32
4 engages with the upper end of the barrier bag b, and this push piece 34
As a result, the sheet film a protrudes from the lower end of the opened barrier bag b toward the pull-out rollers 44 and 45, and the sheet film a falls into the hopper 42 by the rotational movement of the pull-out rollers 44 and 45. Therefore, sheet film a separated from barrier bag b
is received between the blades 65 of the developing device B, and is developed in the developer tank 52 and fixer tank 53.

Furthermore, when the movable base 16 moves back, the driven roller 23 moves along the rear guide groove 21b of the cam groove 21, so the film holder 24, shear blade 26, and cut piece holder 25 move the film mounting portion 4 sideways. However, while the driven roller 23 passes through the return guide groove 21d of the cam groove 21, the relative positional relationship with the movable base 16 is restored,
The film receiver 24, the shearing blade 26, and the cut-off piece receiver 25 are again located on the trajectory passing directly below the film mounting portion 4. Therefore, manual operation lever 3
3 from the mounting base 2, the remaining barrier bag b can be removed with fingertips. The cut piece C held on the cut piece receiver 25 is
When passing directly under the protruding rod 31, it is protruded from the cut piece receiver 25 and falls into the collection box 30.

As is clear from the above description, according to the present invention, the cut pieces of the packaging bag can be reliably collected in the collection box, so the cut pieces do not become an obstacle in the post-processing of the sheet. According to the present invention, a cut piece receiver is provided adjacent to the rear of the shearing blade, and the cut pieces are dropped into a collection box by a protruding rod facing the movement path of this cut piece receiver, using a simple structure. This has the effect of allowing the cut pieces to be collected.

[Brief explanation of the drawing]

Fig. 1 is an overall perspective view of the unsealing device of an automatic developing device according to the present invention, Fig. 2 is an oblique view of the main parts of the unsealing device, Fig. 3 is a sectional view of the main parts of the unsealing device, and Fig. 3 is a sectional view of the main parts of the unsealing device. 4 is a sectional view of the developing device section of the automatic developing device, FIG. 5 is a sectional view taken along the - line in FIG. 4, FIG. 6 is a sectional view taken along the - line in FIG. 4, and FIGS. b~
FIGS. 10a and 10b are explanatory views of the operation of the opening device, showing a vertical cross section and a horizontal cross section, respectively. a... Sheet film, b... Barrier bag, 4...
...Film attachment part, 25...Top piece holder, 26...
Shearing blade, 30...collection box, 31...protrusion rod.

Claims (1)

[Scope of utility model registration request] a film attachment part to which a wrapped sheet such as a film can be attached; a shearing blade for opening the packaging bag by cutting an end of the packaging bag for the sheet held in the film attachment part; A cut-off piece holder provided at the rear in the moving direction of the shearing blade so as to be able to move together and temporarily hold the cut-off piece of the packaging bag cut by the shear blade, and a cut-off piece holder that protrudes from the cut-off piece holder. An opening device for packaging films, etc., comprising a collection box for accommodating pieces.