JPH032736B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus for opening a packaging bag in which X-ray film for, for example, dental X-ray photography is sealed.

[Conventional technology] In general, in dental treatment, X-ray photography is widely used to accurately determine the condition of the patient, and this X-ray photography allows for appropriate treatment that corresponds to the condition of the affected area. It is very convenient because it can be done. X used here
Linear film (hereinafter simply referred to as "film") is
X so that you can take pictures as they are.
It is sealed and packaged in a plastic sheet packaging bag that allows the light to pass through.

Usually, in this packaging bag, the packaging material sheets are stacked or folded into a rectangular shape that is sized to match the shape of the film, and the overlapping edges of the sheets are sealed to form a sealed edge. A film is sealed and packaged inside.

The film packaged in this manner is convenient because it can be photographed as is, but it is necessary to develop the film directly after photographing.

For this reason, in the past, the packaging bag was manually opened in a dark bag and the film was taken out for development, or the developer was injected into the packaging bag with a syringe. ing.

[Problem that the invention seeks to solve]

However, the conventional technology has the following problems. That is, in the method of opening a packaging bag using a dark bag, the two sheets of a rectangular packaging bag are arranged so that they protrude outward from the edge of the tear seal on the center of the three sealed sides of the rectangular packaging bag. A tearing tongue piece integrated with the sheet material is provided, and by peeling these pieces off from each other, the tear-seal edge is torn.Furthermore, by tearing off the seal edge that follows this tear-seal edge, the packaging bag can be opened. Although attempts are made to open the bag, it is actually a tedious task to do so in a dark bag, and it is inconvenient that a considerable amount of force is required to open the bag. In addition, if the number of films to be cut is large due to manual tearing, high processing efficiency cannot be obtained.

On the other hand, in the method using a syringe, the developer must be injected into the packaging bag of each film, which is not practical when a large number of films are to be processed.

From the above points of view, there is a demand for the development of a device that can mechanically and highly efficiently unseal film packaging bags after photography, but to date no practical device has been proposed. Not yet.

[Purpose of the invention]

The present invention has been made based on the above circumstances, and an object of the present invention is to provide an opening device that can mechanically and reliably open a packaging bag.

[Means to solve problems]

The unsealing processing device of the present invention comprises rectangular resin sheets stacked one on top of the other to form a seal edge around the periphery, and the resin sheets are arranged so as to extend outward from the tear seal edge around the center of the three sealed sides. An opening device for a packaging bag, in which a total of two tearing tongues are integrally formed, and one tearing tongue has a single leaf portion that projects beyond the other tearing tongue, at positions adjacent to each other. , a pair of rotating arms that are rotatably provided at their lower ends around mutually parallel horizontal axes so that their upper ends open apart, and a first arm that is provided at the upper ends of these rotating arms, respectively. When the movable support and the second rotary support are close to each other, the packaging bag to be opened is held between them, with the tearing tongue piece at the lower end. a mechanism for holding in a position located at the position; and a mechanism provided on the first rotation support;
a gripping claw that moves obliquely upward so as to scoop up the single leaf portion of the one tearing tongue of the held packaging bag from the inner surface thereof, and grips the one tearing tongue in an outwardly bent state; a first clamping mechanism having a first clamping mechanism; a first clamping mechanism actuating rod whose working end is moved in one direction to actuate the first clamping mechanism; and a first clamping mechanism actuating rod for tearing the other of the held packaging bag. a second clamping mechanism having a gripping claw that moves diagonally upward so as to scoop the tongue from the inner surface thereof and grips the other tearing tongue in an outwardly bent state; and the first clamping mechanism operating rod. a second clamp mechanism, which is positioned opposite to the working end of the second clamp mechanism and operates the second clamp mechanism when the working end is moved in the other direction;
A clamping mechanism operating rod is located between the working end of the first clamping mechanism working rod and the working end of the second clamping mechanism working rod, and is reciprocated to move in the one direction and then in the other direction. a gripping actuation mechanism having an actuation member, and the first clamp mechanism and the second clamp mechanism to separate the first rotation support and the second rotation support from each other while the tearing tongues are being gripped. An expander for opening the packaging bag by pivoting via the associated pivoting arm, thereby tearing the tear seal edge through the tearing tongue of the packaging bag and subsequently tearing off the seal edge. It is characterized by having an opening operation mechanism.

According to such a configuration, the first clamp mechanism and the second clamp mechanism are operated with a short time difference due to the reciprocating movement of the gripping operating mechanism. By gripping each of the tearing tongues of the packaging bag separately, and then expanding both clamp mechanisms, the packaging bag, such as a packaging bag for a photographed film inserted therein, can be opened.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a packaged dental film that is opened by the apparatus of the present invention. This film packaging bag 1 has two approximately rectangular X-ray transparent resin sheets stacked on top of each other, a seal edge is formed around the entire periphery, and a film (not shown) is sealed inside. . This packaging bag 1 has a first tearing tongue piece 101 and a second tearing tongue piece 102, each integral with two resin sheets, so as to protrude outward from a tearable seal edge 100 on one short side of the rectangle. have,
The central portion of the first tearing tongue piece 101 protrudes further outward beyond the second tearing tongue piece 102 to form a single leaf portion.

The basic operating principle of the unsealing device according to the present invention is explained in the second section.
To explain this device schematically, as shown in FIG.
A first clamping mechanism 2 acts on the first tearing tongue piece 101 of the film packaging bag 1 which is held at the processing position with the film packaging bag 2 at the lowest end;
The first clamp mechanism 2 and the second clamp mechanism 3 are sequentially operated by the gripping operation mechanism. The first clamp mechanism 2 and the second clamp mechanism 3 are also provided with an expansion mechanism (not shown) that expands the first clamp mechanism 2 and the second clamp mechanism 3 so that they are separated from each other while holding the tearing tongue of the packaging bag.

That is, the first clamp mechanism 2 has a fixed receiver 2b located close to the outside of the first tearing tongue piece 101.
For example, the first cleaving tongue piece 1 is centered around the fulcrum P.
It consists of a first rotating gripping claw 2a that is rotated in the direction of the arrow along an arc R1 passing through a single leaf portion protruding from the second tearing tongue piece 102 in 01, and is one of the actuating members of the gripping actuation mechanism. By moving in the direction, the first rotary gripping claw 2a is actuated, scoops up the first tearing tongue 101, and moves further, and as shown in FIG. Grip the first tearing tongue piece 101 in an outwardly opened state. As a result, the second tearing tongue piece 102 becomes a single leaf. Further, the second clamp mechanism 3 has a fixed receiver 3b located close to the outside of the second tearing tongue piece 102, and an arc R2 that is centered on the fulcrum Q and passes through the second tearing tongue piece 102, for example. and a second rotating gripping claw 3a that is rotated in the direction of the arrow along the
As the operating member of the grasping operating mechanism moves in the other direction, the second rotating grasping claw 3a is actuated to scoop up the second tearing tongue piece 102 that has become a monolobular state and move further, as shown in FIG. As shown in (b), the second cleaving tongue piece 102 is held in an outwardly open state between it and the fixed receiver 3b.

Then, while the tearing tongues 101 and 102 are being held by the first clamp mechanism 2 and the second clamp mechanism 3, the first clamp mechanism 2 and the second clamp mechanism are moved as shown in FIG. The tearing tongue piece 101 and the second tearing tongue piece 1
02 to split the tearable seal edge 100, and further tear off the seal edge following this tearable seal edge 100, whereby the packaging bag 1 is opened downward.

FIG. 3 and FIG. 4 are a front view and a plan view, respectively, showing essential parts of an opening device according to an embodiment of the present invention. In the figure, 71 and 71' are a first rotation support and a second rotation support, respectively. The front plate 711 and the rear plate 71 face each other (the lower side is the front) and are integrally connected to each other.
2, and the second pivot support 71' has a front plate 711' and a rear plate 712' configured in the same manner as in the first pivot support 71. These first rotation support 71 and second rotation support 71' are
Rotating arm plate 7 extending upward in the illustrated state
3 and 73', respectively. The lower ends of these rotating arm plates 73 and 73' each have horizontal rotating shafts 76 and 76' that are rotatably provided on a vertical support plate 75 fixed to the bottom plate of the outer casing 8. The first rotary support 71 and the second rotary support 71' are rotatably provided so as to expand left and right in a vertical plane according to their upper ends. The rotation shafts 76 and 76' are provided with an expansion mechanism 7, which will be described later.
Interlocking gears 72 and 72' that mesh with each other and constitute the two are respectively fixed.

3 and 4 show the device in an inoperative state, in which the first pivot support 71 and the second pivot support 71' are connected to a tension spring 77, which will be described later. Due to the action of the front plate 71
1 and 711' and the rear plate 71
2 and 712' are in a closed state with their inner edges abutting each other. Between the front plate 711 and the rear plate 712 of the first rotating support 71, a thick guide support plate 4 extending in the front and back direction is fixed at a position close to the inner edge thereof. A similar guide support plate 4' is fixed between the front plate 711' and the rear plate 712' of the two-swivel support 71' so as to extend in the front-rear direction at a position close to their inner edges. Board 4,
The thickness of the gap S formed between 4' is made to match the thickness of the packaged film to be processed, thereby forming a film holding mechanism. Further, the lower end surface of the guide support plate 4 related to the first rotation support 71 is an inclined surface 41 (see FIG. 6) facing the second rotation support 71' side. The lower end surface of the guide support plate 4 according to 71' is an inclined surface 41' that faces toward the first rotation support 71 at a position slightly above the guide support plate 4 of the first rotation support 71.
It is said that

A rotary disk 21 is provided between the front plate 711 and the rear plate 712 of the first rotary support 71 so as to be rotatable via a horizontal support shaft 20 installed between them. As shown in FIG. 5A, this rotary disk 21 has a notch 22 formed at its peripheral edge (upper left portion in the figure) that moves upward and to the right as it rotates. The lower end of the guide support plate 4 is located inside, and the gripping claw (hereinafter referred to as "the first
"Rotating gripping claw 23". ) The diameter and center position of the rotary disc 21 are set so that the inclined surface 41 of the guide support plate 4 is located forward in the direction of movement. The inclined surface 41 of the guide support plate 4 and the first rotating gripping claw 23 allow the first clamp mechanism 2 to
is configured. That is, the inclined surface 41 of the guide support plate 4 corresponds to the fixed receiver 2b in FIG.
The rotating gripping claw 23 corresponds to the first rotating gripping claw 2a.

Between the front plate 711' and the rear plate 712' of the second rotation support 71', there are two rotation plates 31, which are rotatable via a horizontal support shaft 30 installed between them. 31 are provided. These two rotating plates 31, 31 are spaced apart from each other in the front-rear direction so that one is located in front of the rotating plate 21 related to the first rotating support 71, and the other is located in the rear. It is provided. These rotary plates 31, 31 have
As shown in FIG. Movement of the gripping claw (hereinafter referred to as "second rotational gripping claw 33") formed by the notch end face 321 of the notch end faces 321, 322 of the notch portion 32, in which the lower end of is positioned and the notch end face 321 moves forward by rotation. The diameter and center position of the rotating discs 31, 31 are set so that the inclined surface 41' of the guide support plate 4' is located forward in the direction. Note that the two rotary plates 31, 31 have completely similar forms to each other.
And the inclined surface 41' of these guide support plate 4' and the second
The second clamp mechanism 3 is constituted by the rotating gripping claw 33. That is, the inclined surface 41' of the guide support plate 4' corresponds to the fixed receiver 3b in FIG.
The rotating gripping claw 33 corresponds to the second rotating gripping claw 3a.

The upper edges of the guide support plates 4, 4' are arranged to protrude from the upper edges of the front plates 711, 711' and the rear plates 712, 712'. Further, as shown in FIGS. 7 and 8, the guide support plate 4' related to the second rotation support 71' has two rotation plates from the tongue guide rod support part 42' provided on the back surface thereof. Board 31,
Two tongue guide rods 44', 44' are provided on both sides of 31 to extend downward. As shown in FIGS. 7A and 7B and FIG.
It is bent toward the first rotary support 71 so as to protrude from the inclined surface 41' via the guide support plate 3', and extends substantially parallel to the inclined surface 41 of the guide support plate 4 across the lower part of the guide support plate 4.

Reference numeral 5 indicates a gripping operating mechanism that drives the first clamp mechanism 2 and the second clamp mechanism 3. This gripping operating mechanism 5 operates the first operating rod 52 that operates the rotating disc 21 related to the first rotating support 71, and the rotating discs 31, 31 related to the second rotating support 71'. A second operating rod 52', and a movable gripping frame 54 that operates the first operating rod 52 and the second operating rod 52'.
and a gripping crank mechanism 55 that moves the movable gripping frame 54 in the left-right direction.

The first operating rod 52 is an upper rod 521 whose upper end is pivotally connected to the rotating shaft 51 installed between the front plate 711 and the rear plate 712 of the first rotating support 71.
and a lower rod 52 whose upper end is connected at a pivot point a at the lower end of the upper rod 521 and connected to the outer peripheral part of the rotary disk 21 at a pivot point b in the middle of the upper rod 521.
2, and in the non-operating state shown in FIG. 3, it is bent outward at the pivot point a. A tension spring 500 (see FIG. 12), a rod 521, and a lower rod 522 are fixed to the first operating rod 52. This tension spring 500 also constitutes a grip state holding mechanism that maintains the straight state of the upper rod 521 and the lower rod 522 when they are straight.

The second operating rod 52' is connected to the second rotating support 7.
An upper rod 521' whose upper end is pivotally connected to a rotating shaft 51' installed between the front plate 711' and the rear plate 712' of 1', and a pivot point a' at the lower end of this upper rod 521'. The upper end is connected to the lower rod 522', which is connected to the outer periphery of the rotary disks 31, 31 at a pivot point b' in the middle, and in the non-operating state shown in FIG. It is bent outward at a′. Said second operating rod 5
At 2', a tension spring 500' (see FIG. 12) is fixed at both ends to the upper rod 521' and the lower rod 522' so as to extend beyond the pivot point a'. This tension spring 500' is connected to the upper rod 5
21' and the lower rod 522' also constitute a gripping state holding mechanism that maintains the straight state when they are straight. In addition, as shown in FIG. 9, the lower rod 522 of the first operating rod 52 and the second operating rod 52'
The lower rods 522' are positioned such that their lower ends are aligned with each other in the front-rear direction at the same level.

In the above, the gripping state holding mechanism can also be constituted by a coil spring or the like that biases the rotary disks attached to the rotating shafts of the rotary disks 21 and 31 in the operating direction.

As shown in FIG. 9, the movable gripping frame 54 is
It is a horizontally elongated member with an L-shaped cross section, and a guide groove 541 extending horizontally is formed in the vertical plate portion. Two guide pins 53 are provided in the guide groove 541 so as to protrude horizontally from a vertical support plate 53 fixed to the bottom plate of the outer casing 8.
1,532 are slidably fitted, thereby supporting the movable gripping frame 54 so as to be movable in the left-right direction.

The gripping movable frame 54 has a gripping crank mechanism 55 connected to one end (the right end in FIG. 3), and a lower rod 5 of the first operating rod 52 to the other end.
22 and the lower rod 522' of the second actuating rod 52', a vertical actuating plate 542 for biasing them is fixed.

The gripping crank mechanism 55 is rotatably supported by being inserted through a vertical support plate 56 fixed to the bottom plate of the outer casing 8 and a similar support plate 57 provided in front of the support plate 56. horizontal rotation axis 5
51, and a driven gear 552 provided at the front end of the rotating shaft 551 that protrudes forward from the support plate 57.
and a rotating rod 55 fixed to the rear end of the rotating shaft 551.
3, this rotating rod 553 and the movable gripping frame 54
The interlocking rod 554 is connected to one end of the interlocking rod 554 by pivotally connecting both ends thereof.

Reference numeral 6 indicates a grip release operating mechanism, and the grip release operation mechanism 6 is driven by the gripping operation mechanism 5 and is further held in an activated state by the gripping state holding mechanism. Clamp mechanism 2
and the first operating rod 5 in the operating state, which is for releasing the gripping state of the second clamp mechanism 3.
2, a grip release movable frame 64 that drives the second operating rod 52', and a grip release crank mechanism 65 that drives the grip release movable frame 64.

As shown in FIG. 9, the grip release movable frame 64 is a member consisting of a horizontally elongated vertical plate 641, and a guide groove 644 extending horizontally is formed in the vertical plate 641. This guide groove 644
Inside, there are two projecting plates arranged horizontally on a vertical support plate 63 fixed to the bottom plate of the outer casing 8.
The guide pins 631 and 632 of the book are fitted so as to slide, thereby causing the grip release movable frame 64 to
is supported at a position in front of the movable gripping frame 54 so as to be movable in the left-right direction.

This grip release movable frame 64 has one end (the third
At the right end in the figure), there is a connecting piece 645 fixed to protrude upward to which a grip release crank mechanism 65 to be described later is connected, and the first
The operating rod 52 has a horizontal operating plate 642 fixed at a level slightly higher than the lower end of the lower rod 522 so as to face the outer edge of the lower rod 522,
Further, at the other end, a lower rod 52 of the second operating rod 52' is attached.
It has a horizontal actuating plate 643 fixed at a level slightly higher than the lower end of the lower rod 522' so as to face the outer edge of the lower rod 522'.

The grip release crank mechanism 65 includes a horizontal rotation shaft 651 inserted through the support plate 57 and rotatably supported, and a driven gear 652 provided at the front end of the rotation shaft 651 that projects forward from the support plate 57. , a rotating rod 653 fixed to the rear end of the rotating shaft 651, and this rotating rod 653 and the connecting piece 64.
5 and an interlocking rod 654 which is connected by pivoting both ends thereof.

7 indicates an expansion mechanism, and this expansion mechanism 7
are interlocking gears 72 fixed to rotation shafts 76, 76' of rotation arms 73, 73' that support the first rotation support 71 and the second rotation support 71', respectively;
72', and an expansion crank mechanism 74 for driving the first rotating support 71 to expand.

The expansion crank mechanism 74 is connected to the rotating shaft 5.
The support plate 56 and the support plate 57 that support the support plate 51
A horizontal rotating shaft 741 that is inserted above the rotating shaft 551 and rotatably supported, a driven gear 742 provided at the front end projecting forward from the support plate 57, and the rotating shaft of the rotating shaft 741. A rotating rod 743 fixed to the rear end extending beyond the rear end of 551, and this rotating rod 743 and the first
It consists of an interlocking rod 744 connected to the rear plate 712 of the rotating support 71 by pivoting its both ends.

As shown in FIG. 14, when the expansion mechanism 7 is in the non-operating state, the interlocking gear 7
A tension spring 77 that restrains the rotation of the gear 2' in a direction opposite to the direction of rotation due to expansion is attached to a fixed plate 77 fixed to the interlocking gear 72' and the outer casing 8.
1, thereby suppressing the first rotation support 71 and the second rotation support 71' into a mutually closed state.

Reference numeral 9 denotes a drive source mechanism, which includes the gripping actuation mechanism 5, the expansion actuation mechanism 7, and the grip release actuation mechanism 6.
A drive vehicle 9 serves as a common drive source that sequentially operates the
has 0. This drive vehicle 90 has the support plate 57
It is fixed to a drive shaft 92 which is rotatably supported by
It is driven by a motor M via an intermediate gear 93 fixed to a drive shaft 92 and an intermediate gear 94 that meshes with the intermediate gear 93.

The driven gears 552, 742, and 652 in the gripping crank mechanism 55, the expanding crank mechanism 74, and the gripping release crank mechanism 65 have circumferences (indicated by dashed lines in FIG. 3) in a common vertical plane in this order. ) is arranged on the drive wheel 9
A driving gear part 91 is formed in a protruding state on a part of the outer peripheral edge of the drive gear 91 so that the driving gear part 91 sequentially meshes with the driven gears 552, 742, and 652 by rotation of the driving gear part 91. And this drive gear section 91
has a length that allows each driven gear 552, 742, 652 to rotate by one rotation by meshing with and passing through each of the driven gears 552, 742, 652.

A first rotating support 71 is provided on the top plate of the outer casing 8.
A recess 81 is formed above the second rotating support 71', and a pair of downwardly inclined guide plates 82, 82' is provided at the center of the recess 81. A film insertion opening 83 is defined between the lower ends of the guide support plates 4 and 82', and is located directly above the gap S between the guide and support plates 4 and 4'. When the cover 84 that opens and closes the film insertion slot 83 is closed, the recess 84
It is provided so as to open upwardly by a hinge 812 so that it can be housed in the container. SW2 is this cover 8
4 shows a detection switch that detects the open/closed state,
This switch SW2 has an elastic piece 851 that is activated when the cover 84 located at the bottom 811 of the recess 81 of the outer casing 8 is closed, and the switch piece 85 is operated by this elastic piece 851. Then, from the lower surface of the cover 84, the tongue guide rods 44', 44' below the guide support plates 4, 4'
The distance is set to be approximately equal to the length in the vertical direction of the packaging bag for the film to be processed.

On the other hand, a film discharge port 86 is formed directly below the guide support plates 4 and 4' on the bottom plate of the outer casing 8, and a pair of film guides 88 and 88', which are inclined toward the film discharge port 86, are connected to the outer casing 8. is installed on the bottom plate of the Furthermore, a shutter 87 for opening and closing the film outlet 86 is provided on the outer surface of the bottom plate. This shutter 87 is controlled by, for example, the switch SW2 so that the film outlet 86 is closed when the cover 84 is open and the film outlet 86 is opened when the cover 84 is closed. Preferably, it is connected to a shutter operating mechanism (not shown).

FIG. 10 shows a preferred example of a drive circuit for the motor M of the drive source mechanism 9 shown in FIG. A motor self-holding limit switch that is held closed while the motor rotates one revolution when the motor starts driving.
Connect the series circuit with SW1 to the power supply AC, and
A first relay coil Ry1 and a first normally open relay contact ry operated by the first relay coil Ry1.
1a, a second normally closed relay contact ry2b operated by the second relay coil Ry2, and a detection switch SW2 that detects the open/closed state of the cover 84.
Connect the series circuit with the power supply AC, and further connect the series circuit with
Start switch in parallel to normally open relay contact ry1a
Connect PSW. In addition, the first relay coil Ry
A parallel connection body of a first normally open relay contact ry1b operated by the coil Ry1 and a second normally open relay contact ry2c operated by the second relay coil Ry2, and a series circuit of the motor M are connected to a power source AC. , operation indicator lamp PL, and second relay coil Ry
a second normally open relay contact activated by ry
It is constructed by connecting a series circuit with 2a to a power supply AC. MSW is the main switch.

FIG. 11 is a perspective view showing the external appearance of the above-mentioned opening processing device, in which 89 is a switch button of the main switch MSW, and 891 is a switch button of the start switch PSW.

Next, the operation of the above-mentioned device will be explained. First, the cover 84 is opened, and the packaged film to be unsealed is inserted into the space S through the insertion opening 83 with the sealed edge 100 of the packaging bag positioned at the lower end.
The guide and support plates 4 and 4' are used as guides to push in while sliding on each inner surface of the plates. Then, by closing the cover 84, the packaging bag 1 is pushed down through the lower surface of the cover 84, whereby the packaging bag 1 is moved so that the tip edge of the first tearing tongue piece 101 is aligned with the tongue piece guide rod 44',
44' (see Figure 6). Thereby, the packaging bag 1 is held on both sides by the frictional force with the guide support plates 4, 4'.
At this time, the tearing tongue piece 10 protrudes further forward.
1 may be bent toward the inclined surface 41 of the guide support plate 4 by the tongue guide rods 44', 44' to be in a slightly opened state.

With the thus wrapped film set, the drive wheel 90 of the drive source mechanism 9 is moved to the third position.
The packaging bag 1 is opened in the following manner by making one rotation in the direction of the arrow from the state shown in the figure, that is, the state in which the driving gear portion 91 is in front of the driven gear 552 related to the gripping crank mechanism 55.

That is, when the drive wheel 90 rotates in the direction of the arrow, the drive gear portion 91 first engages with the driven gear 552 of the gripping actuating mechanism 5, and while passing through this, the rotation rod 553 rotates once, and the gripping crank mechanism 5 rotates. 5
5 to operate. As a result, as shown in FIG. 12, the movable gripping frame 54 is moved from the position shown in FIG.
It is driven to make one reciprocating motion, first moving to the right and then moving to the left. As a result, when the movable gripping frame 54 is moved to the right, the vertical actuation plate 542 moves the lower end of the lower rod 522 of the first actuation rod 52 to the right, that is, as shown by the two-dot chain line, the vertical actuation plate 542 Push and move the operating rod 52 in the direction of extending it linearly.

However, the first operating rod 52 has its upper rod 521
Since its upper end is pivotally connected to the rotating shaft 51 fixed to the first rotating support 71, the lower rod 522 is displaced downward, and as a result, the pivot point b
The rotary disk 21 of the first clamp mechanism 2, which is pivotally mounted at , is rotated in the direction of the arrow from the state shown by the dashed line, and the first rotary gripping pawl 23 formed on the outer periphery of the rotary plate 21 is rotated in the direction of the arrow. 4', contacts the inner surface of the first tearing tongue 101 of the packaging bag 1 protruding from the lower end of the packaging bag 1, scoops it up, and rotates further to release the first tearing tongue 101 as shown in FIG. 101 is pushed down onto the inclined surface 41 of the guide support plate 4, and in this state, it is squeezed and held.

In this state, the grip state holding mechanism related to the first operating rod 52, in the illustrated example, the tension spring 5
00 is in a so-called quasi-stable state and its tensile force holds the first actuating rod 52 in an extended state, so the first clamping mechanism 2 maintains its gripping state, and the movable gripping frame 54 Even if it moves to the left and is separated from the first operating rod 52, this state is still maintained.

Subsequently, the movable gripping frame 54 is moved to the left, and the vertical actuation plate 542 is moved to the lower rod 5 of the second actuation rod 52'.
The lower end of the second actuating rod 52' is pushed to the left, that is, in the direction of extending the second actuating rod 52' in a straight line as shown by the two-dot chain line.

However, the second operating rod 52' is
1' is the rotating shaft 5 fixed to the second rotating support 71'
Since its upper end is pivotally connected to 1', the lower rod 5
22' becomes displaced downward, and as a result,
The rotating discs 31, 31 of the second clamp mechanism 3, which are pivotally attached at the pivot point b', are rotated in the direction of the arrow from the state shown by the dashed line, and the second rotating gripping claw 33 formed on the outer periphery thereof However, the second tearing tongue piece 102 protrudes from the lower end of the guide support plates 4, 4' and remains alone because the first tearing tongue piece 101 has already been displaced outward and gripped. The second tearing tongue piece 10 comes into contact with the exposed inner surface of the tongue and scoops it up, and then rotates further to remove the second tearing tongue piece 10 as shown in FIG.
2 onto the inclined surface 41' of the guide support plate 4',
In this state, press and hold.

In this state, the tension spring 500', which is the holding state holding mechanism for the second operating rod 52',
is in a so-called quasi-stable state, and its tensile force holds the second operating rod 52' in an extended state, so that the second clamping mechanism 3 maintains its gripping state, and the movable gripping frame 54 Even if it moves to the right and separates from the second operating rod 52', this state is still maintained.

As described above, the two tearing tongues of the set film packaging bag 1 are opened outward from each other, and the first clamping mechanism 2 and the second It is in a state where it is fixedly held by the second clamp mechanism 3 of the rotation support 71'.

When the drive wheel 90 further rotates in the direction of the arrow, the drive gear section 91 then rotates to the driven gear 74 of the expansion mechanism 7.
2 and rotates the rotating rod 743 once to operate the expansion crank mechanism 74. That is, the rotating rod 74
3 starts to rotate, the first rotation support body 71 is pulled by the interlocking rod 744 of the expansion crank mechanism 74, and the rotation shaft 7 of the rotation arm plate 73 that supports it is pulled.
6 to the right as shown in FIG. 14 to open.

At the same time, the interlocking gear 72 fixed to the rotating shaft 76 is rotated and the interlocking gear 7 meshes with the interlocking gear 72.
2' is driven, and as a result, the second rotating support 7
1' is rotated to the left around the rotation shaft 76' via the rotation arm plate 73' and opened. At this time, the tension spring 77 provided on the interlocking gear 72' is expanded.

By expanding the first rotation support 71 and the second rotation support 71' to both sides in this way, the first clamp mechanism 2 and the second clamp mechanism 3 provided thereon can be moved to the left and right of each other. Although it is spaced apart,
At this time, the tearing tongues of the packaging bag 1 are still gripped by these clamp mechanisms, so due to the separation between them, the packaging bag 1 is first torn at its tear sheet edge 100 and then torn. The seal edges on both sides are peeled off and opened. Since the packaging bag 1 is opened in a downward-opening manner in this manner, the undeveloped film is separated from the packaging bag, falls, and is discharged from the opened discharge port 86.

After that, when the rotation angle of the rotation rod 743 in the expansion operation mechanism 7 exceeds 180 degrees, the expansion crank mechanism 74 starts pushing back the first rotation support 71, and the return force by the tension spring 77 is also applied. Then, a return operation opposite to the above is performed. That is, the first rotating support 71 and the second rotating support 71' are rotated back and returned to the initial state (the state shown by the solid line in FIG. 14).

The packaging bag is opened as described above,
The film is separated and taken out, but in this state, the gripping state holding mechanism by the tension springs 500, 500' remains in operation.

When the drive wheel 90 further rotates, the drive gear portion 91 engages the driven gear 6 in the grip release operating mechanism 6.
Rotating rod 653 while meshing with 52 and passing through this
The grip release crank mechanism 65 is activated by rotating the grip once. That is, like the movable gripping frame 54, the gripping release movable frame 64 is driven to make one reciprocating movement from the position shown in FIG. 3 by first moving rightward and then leftward.

As a result, the movable grip release frame 64 is moved to the right, so that the horizontal actuating plate 643 provided at the other end (left end) of the grip release movable frame 64 is extended from the state shown in FIG. The lower end of the lower rod 522' of the second operating rod 52', which is in the state of The second rotating gripping claw 33 of the second clamping mechanism 3 is rotated in a direction away from the inclined surface 41' of the guide support plate 4', and the tearing tongue piece 102 is returned to the second clamping mechanism 3. be freed from

Next, when the movable frame 64 for grip release is moved to the left, the horizontal actuation plate 642 provided at one end (right end) of the movable frame 64 for grip release moves the lower part of the first actuation rod 52 which is in the extended state. The lower end of the rod 522 is actuated and pushed to the left, whereby the first actuating rod 5 is moved by the tensile force of the tension spring 500.
2 returns to its original bent state, and the first rotating gripping claw 23 in the first clamping mechanism 2 is attached to the guide support plate 4.
is rotated in a direction away from the inclined surface 41, and the tearing tongue piece 101 is released from the first clamp mechanism 2.

The device thus returns to its initial state.

The opening process of the film packaging bag 1 is achieved as described above, but as the first rotation support 71 and the second rotation support 71' are expanded by the expansion operation mechanism 7, the packaging bag 1 is opened. is cleaved from below, and as a result, its upper end is once drawn into the space S.
However, with the return of the first rotating support 71 and the second rotating support 71', the shape of the empty packaging bag 1 is restored due to the restoring force of the packaging bag itself, and the upper end of the empty packaging bag 1 returns to its original shape. = Since it rises inside the S and protrudes into the insertion slot 83, it is supported by the guide support plates 4, 4' and stops, so it can be easily discharged to the outside by opening the cover 84, pinching the protruding upper end, and pulling it out. Can be done.

Next, the operation of the motor drive circuit of the drive source mechanism 9 will be explained. First, after turning on the main switch MSW, insert the packaging bag 1 from the film insertion slot 83 and close the cover 84, and then the detection switch SW is turned on.
The second switch piece 85 is actuated by the elastic piece 851, and the detection switch SW2 is closed.

When the start switch PSW is closed by pressing the switch button 891 in this state, the first relay coil Ry1 is energized, thereby closing the first normally open relay contact ry1a and the first relay contact ry1b, thereby driving the motor M. As a result, the motor self-holding limit switch SW1 is closed and the second
Relay coil Ry2 is energized, which causes the second
The normally open relay contacts ry2a and ry2c are closed, and the second normally closed relay contact ry2b is closed. In this way, the second normally closed relay contact ry2b is opened, so the first relay coil Ry1 is deenergized, which causes the first normally open relay contacts ry1a and ry1b to open.
is opened, but since the second normally open relay contact ry2c is closed, the motor M continues to drive.

When the drive wheel 90 rotates once and returns to the initial position shown in FIG. 3, the limit switch SW1 is opened and the second relay coil Ry2 is deenergized, thereby causing the second normally open relay contacts ry2a, ry2
c is opened and the second normally closed relay contact ry2b
is closed, and as a result, the driving of the motor M is stopped and the drive wheel 90 stops at its original position.

According to the apparatus configured as described above, simply by inserting the undeveloped film that has been photographed in its packaging through the film insertion slot 83, closing the cover 84, and operating the switch button 891 of the start switch PSW. Since the packaging bag is automatically opened and the undeveloped film is discharged from the discharge port 86, it is possible to mechanically unseal the film packaging bag after shooting without having to worry about obtaining the film. Thus, opening processing can be accomplished with high efficiency.

Furthermore, since the separated film can be automatically discharged using gravity, by connecting the film inlet of a developing means such as an automatic developing machine to the film discharge port 86, it is possible to discharge the separated film very easily and reliably. It is very convenient because the film can be supplied to the developing device, and in particular, it is possible to develop a large number of films continuously.

In the present invention, the first tearing tongue has a single leaf portion that protrudes beyond the second tearing tongue, and this is used to grip the first tearing tongue by the first clamp mechanism, and as a result, the The second tearing tongue piece is held in a single leaf state by the second clamp mechanism, and the first clamp mechanism and the second clamp mechanism are operated by reciprocating a common gripping operating mechanism. Since they are operated sequentially via the mechanism operating rod and the second clamping mechanism operating lever, the first clamping mechanism and the second clamping mechanism are operated with a short time difference and reliably in this order, thus ensuring that the packaging bag is Each of the tearing tongues is held separately by both clamp mechanisms in a reliable and smooth manner, and as a result, the packaging bag opening device can be operated with high reliability and efficiency.

Further, in the above embodiment, the first clamp mechanism 2 is constituted by the rotary gripping claw 23 formed on the rotary disk 21, and the second clamp mechanism 3
The rotating gripping claw 33 formed on the rotating disk 31
Since it is configured as follows, there is an advantage that the operation of the clamp mechanism can be made smooth and reliable.

However, in the present invention, the present invention is not limited to this, and for example, as shown in FIG. This configuration may also be used. In addition, in the clamp mechanism,
Instead of the inclined surface 41 of the guide support plate 4, for example, the first
As shown in Fig. 7, the lower edges of each of the guide support plates 4, 4' are rotated at a certain angle to open outward as shown by the chain lines, and then stopped, and at that position, the rotating pieces act as receivers. 45, 45', or a receiving piece for receiving a rotary gripping claw separate from the guide support plate may be provided separately.

In addition, with the configuration using the common drive source mechanism 9,
Since the necessary opening process is automatically performed simply by starting the drive source mechanism 9, it becomes an extremely convenient device.

Furthermore, according to the configuration in which a motor drive circuit as shown in FIG. 10 is incorporated into the drive source mechanism 9, when the cover 84 is opened, the switch button 891 of the start switch PSW provided on the outer casing 8 is operated. Since the drive source mechanism 9 does not operate even if the package is opened, no light from the outside is irradiated onto the area where the packaging bag being opened is located, and therefore the photographed film is not damaged.

In order to set the film in the processing position, if tongue guide rods 44', 44' are provided as shown in FIG. The guide rods 44', 44' allow it to be bent along the inclined surface 41 of the guide support plate 4 to be gripped, which further increases the reliability of the operation by the first clamping mechanism 2. can be improved. This is particularly effective when the packaging bag has a tendency to bend so that the long tearing tongue 101 curves toward the short tearing tongue 102.

In order to drive the gripping actuation mechanism 5, expansion actuation mechanism 7, and grip release actuation mechanism 6, a drive source that drives each mechanism in a predetermined order and time relationship is connected, without relying on a drive source mechanism. Alternatively, each mechanism may be operated manually without using a drive source.

〔effect〕

As described above, the present invention is made up of rectangular resin sheets stacked on top of each other to form a sealing edge around the periphery.
A total of two tearing tongue pieces are formed integrally with the resin sheet so as to extend outward from the tear seal edge related to the center side of the three sealed sides, and one tearing tongue piece is connected to the other tearing tongue piece. An opening device for a packaging bag having a single leaf portion projecting beyond the bag, the lower end of each being rotatable around a horizontal axis parallel to each other so that the upper ends of each can be opened apart in positions adjacent to each other. A pair of rotating arms provided, a first rotating support and a second rotating support provided at the upper ends of these rotating arms, and the first rotating support and the second rotating support. a mechanism for holding a packaging bag to be opened between the two in a state in which the opening tongues thereof are located at the lower end thereof in a state where the opening tongues are close to each other;
a gripping claw that moves obliquely upward so as to scoop up the single leaf portion of the one tearing tongue of the held packaging bag from the inner surface thereof, and grips the one tearing tongue in an outwardly bent state; a first clamping mechanism having a first clamping mechanism; a first clamping mechanism actuating rod whose working end is moved in one direction to actuate the first clamping mechanism; and a first clamping mechanism actuating rod for tearing the other of the held packaging bag. a second clamping mechanism having a gripping claw that moves diagonally upward so as to scoop the tongue from the inner surface thereof and grips the other tearing tongue in an outwardly bent state; and the first clamping mechanism operating rod. a second clamp mechanism, which is positioned opposite to the working end of the second clamp mechanism and operates the second clamp mechanism when the working end is moved in the other direction;
A clamping mechanism operating rod is located between the working end of the first clamping mechanism working rod and the working end of the second clamping mechanism working rod, and is reciprocated to move in the one direction and then in the other direction. a gripping actuation mechanism having an actuation member, and the first clamp mechanism and the second clamp mechanism to separate the first rotation support and the second rotation support from each other while the tearing tongues are being gripped. The opening expansion of the packaging bag is caused by pivoting via the associated pivoting arm, thereby tearing the tear seal edge through the tearing tongue of the packaging bag and subsequently tearing off the seal edge. Since it is characterized by having an opening operation mechanism, it is possible to perform opening processing of a specific packaging bag with high reliability and high efficiency.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a packaging bag for packaged dental X-ray film, FIGS. 4 and 4 are an explanatory front view and an explanatory plan view, respectively, showing the overall configuration of the main parts of the device of the embodiment, and FIGS.
6 is a front view for explaining the operation of the first clamp mechanism and the second clamp mechanism, and FIGS. 7A and 7B are tongues, respectively. An explanatory left side view and an explanatory right side view showing a part of Fig. 6 for one guide bar, Fig. 8 a perspective view showing a part of the other guide support plate, and Fig. 9 a movable gripping frame. FIG. 10 is a circuit diagram showing an example of a motor drive circuit;
FIG. 11 is a perspective view showing the appearance of the device of the embodiment, FIG. 12 is an explanatory diagram of the gripping operation by the movable gripping frame,
FIG. 13 is an explanatory diagram of the operation of the first clamp mechanism and the second clamp mechanism, FIG. 14 is an explanatory diagram of the expanding operation of the rotating support, and FIG. 15 is an explanatory diagram of the operation by the movable frame for grip release, FIG. 16 is an explanatory diagram of a modification of the clamp mechanism, and FIG. 17 is an explanatory diagram of a modification of the guide support plate. 1...Packaging bag, 101...First tearing tongue piece,
102... Second tearing tongue piece, 12... Rotating gripping claw, 13... Guide groove, 2... First clamp mechanism,
21... Rotating disk, 23... First rotating gripping claw, 24
...Gripping claw, 3...Second clamp mechanism, 31...
Rotating disc, 33...Second rotating gripping claw, 4, 4'...
Guide support plate, S... space, 41, 41'... inclined surface section, 45, 45'... rotating piece, 5... gripping operating mechanism, 52, 52'... operating rod, a, a' ,b,
b'...Pivot point, 54...Movable gripping frame, 55...
Crank mechanism for gripping, 6... Operating mechanism for releasing grip, 64... Movable frame for releasing grip, 65... Crank mechanism for releasing grip, 7... Expansion operating mechanism, 71,
71'...Rotating support body, 74...Crank mechanism for expansion, 8...Outer casing, 83...Film insertion slot, 8
4...Cover, 86...Film outlet, 87...
... Shutter, 9 ... Drive source mechanism, 90 ... Drive wheel, 91 ... Drive gear section.

Claims (1)

[Scope of Claims] 1 Consisting of rectangular resin sheets stacked one on top of the other to form a seal edge around the periphery, and integral with the resin sheet so as to extend outward from the cleavage seal edge around the center of the three sealed sides. A packaging bag opening device having a single leaf portion in which a total of two tearing tongues are formed and one tearing tongue protrudes beyond the other tearing tongue, at positions adjacent to each other, A pair of rotating arms that are rotatably provided at the lower ends of each arm around mutually parallel horizontal axes so that the upper ends of each arm open apart, and a first rotating arm that is provided at the upper end of each arm. The supporting body, the second rotating support, and the first rotating support and the second rotating support are close to each other, and a packaging bag to be opened is held between them, with the tearing tongue piece at the lower end. a mechanism for holding in the position position; and a mechanism provided on the first rotation support;
a gripping claw that moves obliquely upward so as to scoop up the single leaf portion of the one tearing tongue of the held packaging bag from the inner surface thereof, and grips the one tearing tongue in an outwardly bent state; a first clamping mechanism having a first clamping mechanism; a first clamping mechanism actuating rod whose working end is moved in one direction to actuate the first clamping mechanism; and a first clamping mechanism actuating rod for tearing the other of the held packaging bag. a second clamping mechanism having a gripping claw that moves diagonally upward so as to scoop the tongue from the inner surface thereof and grips the other tearing tongue in an outwardly bent state; and the first clamping mechanism operating rod. a second clamp mechanism, which is positioned opposite to the working end of the second clamp mechanism and operates the second clamp mechanism when the working end is moved in the other direction;
A clamping mechanism operating rod is located between the working end of the first clamping mechanism working rod and the working end of the second clamping mechanism working rod, and is reciprocated to move in the one direction and then in the other direction. a gripping actuation mechanism having an actuation member, and the first clamp mechanism and the second clamp mechanism to separate the first rotation support and the second rotation support from each other while the tearing tongues are being gripped. An expander for opening the packaging bag by pivoting via the associated pivoting arm, thereby tearing the tear seal edge through the tearing tongue of the packaging bag and subsequently tearing off the seal edge. A packaging bag opening device comprising an opening mechanism.