JPH0541487B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Application Field) The present invention is, for example, cutting a cylindrical film to a predetermined length, sealing the cut portion to form a bag, and expanding the opening of the packaging bag. This invention relates to a device for opening and closing the supply opening of a bagging and packaging machine for vegetables and fruits, etc., which opens the bag, inserts the contents therein, ties the opening and discharges the bag.

(Prior Art) Conventionally, as this type of bagging packaging machine, there is one described in, for example, Japanese Unexamined Patent Publication No. 174413/1983. In this packaging machine, as shown in Fig. 14, a pair of endless main chains 4 are arranged in a vertically extending manner and horizontally facing each other. A plurality of packaging bag transfer members 42 each having a pair of clamp parts (consisting of a support arm 43, a rotating arm 44, a fixed clamping plate 46, a movable clamping plate 48, etc.) are mounted at equal intervals, The transfer member 42 transfers both edges of the cylindrical bag from various devices responsible for one step of packaging work, that is, an expander 81 that opens and holds a cylindrical film formed into a cylindrical shape in advance into a bag shape. A holding/drawing device A that is gripped and pulled out by clamp parts 43, 44, 46, and 48, and a cylindrical film pulled out from the holding/drawing device A is cut into a predetermined length and the cut portion is sealed to form a single sheet. A seal cut device B is formed with a packaging bag 77, and both clamp portions 43, 44, 46, and 48 are opened and closed so as to open and close the mouth portion 78 of the packaging bag 77 sent from the seal cut device B by the transfer member 42. The bag opening/closing device C and the opening 7 of the packaging bag 77 sent from the bag opening/closing device C by the moving member 42
8, and the sealed packaging bag 7.
7 to the clamp portions 43, 44 of the transfer member 42,
46, 48 so that the clamp part 4
3, 44, 46, and 48 are connected to both main chains 4, respectively.
By arranging the various devices A, B, C, and D in sequence along the main avenue 4 in synchronization with the movement of the transfer member 42 as the transfer member 42 rotates, the various devices A, B, C, and D can effectively cooperate to achieve continuous operation. I'm starting to do it.

In particular, both the clamp parts 43, 44, 46, 4 are arranged so as to open and close the mouth part 78 of the packaging bag 77 sent by the transfer member 42 from the seal cut device B.
Bag mouth opening/closing device C for opening and closing 8
152122)), please refer to No. 15 and 16.
As shown in the figure, the front lower sprocket 8 of the sprockets on which the main chain 4 is
A guide member 84, which is erected along the moving direction of the transfer member 42 between the left and right main chains 4, is rotatably attached to a shaft 85 at its lower end on a base plate 83 installed near the main chain 2. There is. This guide member 84 is composed of left and right guide rods 86, and an object steadying plate 87 installed between both guide rods 86 except for the entrance portion 86a at the lower end and the outlet portion 86b at the upper end. A guide surface 88 is formed along the longitudinal direction of both guide rods 86,
The distance between this guide surface 88 and the movement locus of the transfer member 42, that is, the main chain 4, is determined by the distance between the inlet portion 8
6a and the outlet portion 86b, and widen between them. Furthermore, when the operating rod 89 connected to the inside of the steady rest plate 87 is operated, the guide member 84 tilts within a certain angle range about the shaft 85 at its lower end, as shown by the imaginary line in FIG.

Engagement protrusions 90 are provided at the distal ends of both rotating arms 44 of the transfer member 42 to protrude inward. When the transfer member 42 moves upward along the main chain 4, the engagement protrusion 90 enters the entrance portion 86a of both guide rods 86 and comes into contact with the guide surface 88, as shown in FIG. As 42 rises, it comes into contact with this guide surface 88 and is restricted in its guidance. That is, as the interval gradually increases,
As shown in FIG. 18, the rotating arm 44 of the transfer member 42 is forcibly opened against the support arm 43 against the bias of the spring 62. 48 is opened from the closed state, and the opening 78 of the packaging bag 77 is opened. At this time, the contents are supplied to the opened packaging bag 77. When the distance is gradually narrowed at the outlet part 86b after the contents are supplied, the rotating arm 44 gradually closes with respect to the support arm 43 due to the bias of the spring 62, and both clamp parts 43, 44, 46,
48 closes again. In addition, when adjusting the opening width of the packaging bag 77, the operation rod 8 is used as described above.
9 to adjust the tilting of the guide member 84.

(Problems to be Solved by the Invention) As described above, in the bag mouth opening/closing device C, both clamp parts 43, 44, 46 of the packaging bag transfer member 42,
48 is adapted to be opened and closed by the guide member 84 and the engaging protrusion 90, and is particularly suitable when the transfer member 42 moves in the vertical direction.

However, due to the structure of the opening/closing device C, it is very difficult to open and close the clamp portions 43, 44, 46, and 48 when the transfer member 42 moves laterally.

Accordingly, the present invention is such that even when the packaging bag transfer member moves laterally, the contents supply opening can be opened and closed with the movement of the transfer member using a simple structure.

Structure of the Invention (Means for Solving Problems) That is, as shown in the drawings of the embodiments described later, the present invention includes a pair of clamp parts 43, 44, 46, 48 that grip the opening 78 of the packaging bag 77. A transfer member 42A supported by a shaft 45 so as to be openable and closable with respect to each other,
42B, 42C, and both clamp parts 43, 4
A pair of links 57, 58 whose distal ends are rotatably supported by a shaft 59, and whose proximal ends are supported by a shaft 60 so as to be mutually openable and closable; 5
8 together with the clamp parts 43, 44, 46, 48 to always close each other; and the transfer members 42A, 42B, 42.
Corresponding to the movement locus L in the lateral direction of C, and provided so as to be able to approach and separate from the same movement locus L,
It has a guide surface 35 that can engage with the engaging portions 61 provided on the links 57, 58, and the guide surface 35 has a portion 35a where the distance from the movement locus L gradually becomes larger and a portion 35c where the distance from the movement trajectory L gradually becomes smaller. and an interval adjustment member 36 that adjusts the amount of proximity movement of the guide member 30 with respect to the movement trajectory L and changes and adjusts the distance between the guide surface 35 and the movement trajectory L. be.

(Function) Both links 57 and 58 are connected to both clamp portions 4
3, 44, 46, and 48, the link 5
When the engaging portions 61 of 7 and 58 engage with the guide surface 35 of the guide member 30 and are pushed, both links 57 and 5
8 is opened against the bias of the spring 62, and the packaging bag 7 is opened together with both clamp parts 43, 44, 46, and 48.
The mouth part 78 of 7 opens. After the contents are supplied from the mouth portion 78, when the engagement portions 61 of the links 57, 58 and the guide surface 35 of the guide member 30 are disengaged and the pressure on the engagement portion 61 is released, Due to the bias of the spring 62, the packaging bag 77 returns to the closed state.
mouth 78 is closed. Further, the guide member 30 is moved between the transfer members 42A and 42 via the interval adjustment member 36.
When brought close to the movement trajectory L of B and 42C,
Since the distance between the guide surface 35 and the movement trajectory L becomes narrower, the opening degree of the opening 78 of the packaging bag 77 becomes smaller.
On the other hand, when the guide member 30 is moved away from the movement trajectory L, the opening degree of the mouth portion 78 becomes larger.

(Example) An example of the present invention will be described below with reference to the drawings.

As shown in FIG. 2, mounting frames 1 facing each other are provided on both the left and right sides so as to extend in the horizontal direction at regular intervals, and as shown in FIG.
Chain wheels 2 and 3 are attached to both the front and rear sides of. Between the front and rear chain wheels 2 and 3, there is an endless main chain 4 as shown in FIG.
The left and right parts of the chain wheels 2 and 3 are hung in a vertical position below the front chain wheel 2 and above the rear chain wheel 3, and both chain wheels 2,
Between 3 and 3, it is almost horizontal. Chain engagement plates 5 and 6 (spacing changing members) are respectively attached to the mounting frame 1 between the two chain wheels 2 and 3 in the vicinity thereof, and
The trajectory of the main chain 4 is changed by holding the main chain 4 downward in the vicinity. That is, the main chain 4 between both chain wheels 2 and 3 slopes downward from the front chain wheel 2 to reach the lower surface of the front chain engagement plate 5, and between the front chain engagement plate 5 and the rear chain engagement plate 6. It is in a horizontal state and slopes upward from the lower surface of the rear chain engagement plate 6 to reach the rear chain wheel 3. A plurality of support claws 7 (support members) are connected to this endless main chain 4 at equal intervals (only one support claw 7 is shown in Fig. 2), and the main As the chain 4 rotates, it passes through the front chain wheel 2 and reaches the rear chain wheel 3. This support claw 7 has a support recess 8 formed therein.

A guide rail 9 is attached to the mounting frame 1 along the side of the main chain 4 between the two chain wheels 2 and 3, and a guide groove 9a formed on the upper surface of the guide rail 9 is provided as shown in FIG. Upper end of front chain wheel 2 and rear chain wheel 3
It is on the plane that connects the bottom edge of. This guide rail 9
A rail rod 10 is installed above the mounting frame 1 along this line.
A slide rod 1 is attached to this rail rod 10.
1 is supported so as to be movable in the front-back direction. First, second and third feed claws 12, 13 and 14 are provided at the rear, middle and front parts of this slide rod 11, respectively.
The shaft 15 is in a state where it protrudes downward from the slide rod 11.
It is supported so as to be tiltable in the front-rear direction, and is normally held in an upright position by a spring 16.
The second feed claw 13 in the middle part and the first feed claw 12 in the rear part
The distance therebetween is narrower than the distance between the second feed claw 14 at the front and the second feed claw 13 at the middle. A lever 17 is supported by a shaft 18 at the rear lower part of both the left and right mounting frames 1 so as to be tiltable in the front-rear direction, and its upper end is connected to the rear part of the slide rod 11 via a link 19. The left and right levers 17 are connected to each other at their lower ends, and one lever 17 is connected to a piston rod 20a of an air cylinder 20. And this piston rod 20a
When the rail moves forward or backward, both the left and right levers 17 tilt forward and backward about the shaft 18, and the slide rod 11 moves back and forth along the rail rod 10. In addition, the slide rod 11 and each feed claw 12, 13,
14 etc. constitute a feeding member, and this feeding member and the guide rail 9 etc. constitute a moving mechanism.

As shown in FIG. 3, cantilever-shaped leaf springs 23, 22, and 21 are attached to both the front and rear sides of the guide rail 9 and the rear part of the mounting frame 1, and are formed at their free ends. stopper recesses 23a, 22
A, 21a indicates that the guide rail 9 protrudes above the guide groove 9a. The third stopper recess 23a of the front leaf spring 23 of the guide rail 9 is located approximately in the middle between the front chain engaging plate 5 and the rear chain engaging plate 6.
The second stopper recess 22a is located next to the rear chain engagement plate 6, and the first stopper recess 21a of the leaf spring 21 of the mounting frame 1 is located approximately midway between the rear chain engagement plate 6 and the rear chain wheel 3. The distance between the first stopper recess 21a and the second stopper recess 22a is the same as the distance between the first feed claw 12 and the second feed claw 13.
The distance between a and the third stopper recess 23a is equal to the distance between the second feed pawl 13 and the third feed pawl 14, respectively. Each stopper recess 21a,
First, second and third stopper plates 2 are provided on the side surfaces of the guide rail 9 on the rear side of the guide rails 22a and 23a.
4, 25, and 26 are supported by a shaft 27 so as to be tiltable in the front-back direction, and an interlocking rod 28 is attached to the lower end of the shaft 28.
connected by a. This interlocking rod 28 is always moved forward by a spring 29, and due to this movement, each stopper plate 24, 25, 26 is tilted backward about the shaft 27, and the upper parts 24a, 25
a, 26a are adapted to be retracted downward from above the guide groove 9a of the guide rail 9. When the lever 17 is tilted forward and the slide rod 11 is in the forward movement position, the third feed pawl 14 is placed on the front chain wheel 2, and the second feed pawl 13 is placed on the front chain engagement plate 5 and the third stopper recess. 23a, the first feed pawl 12 is located between the third stopper recess 23a and the rear chain engagement plate 6, and the first,
The upper portions 24a, 25a, 26a of the second and third stopper plates 24, 25, 26 are retracted downward from above the guide rail 9. On the other hand, when the lever 17 tilts backward as shown in FIGS. As the interlocking rod 28 moves to the front side of the second and third stopper recesses 21a, 22a, and 23a, the spring 29
is pushed backward by lever 17 against the bias of
First, second and third stopper plates 24, 25, 26
tilts forward about the shaft 27, and its upper part 24
a, 25a, 26a protrude above the guide rail 9 to form first, second and third stopper recesses 21a, 22.
a, located on the rear side of 23a.

A base portion 31 of a guide member 30 is rotatably supported by a shaft 32 on the mounting frame 1 above the guide rail 9 . In this guide member 30, a guide rod 34 is connected to two legs 33 that protrude downward from a base 31, and a guide surface 35 formed on the lower surface of this guide rod 34 extends from the front end of the guide rod 34. A slanted portion 35a that slopes downward as it extends to the rear end, a horizontal portion 35b that extends rearward following the slanted portion 35a, and this horizontal portion 3
5b and an inclined portion 35c that slopes upward as it extends to the rear end of the guide rod 34. An operating rod 36 serving as a spacing adjustment member is rotatably supported by a bearing 37 between the front ends of both mounting frames 1, and a left-handed threaded portion 38 and a right-handed threaded portion 39 are formed on both left and right sides of the operating rod 36. An operating knob 36a is attached to one end of an operating rod 36 on the outside of the mounting frame 1. A moving block 40 is screwed into both threaded portions 38 and 39, and the guide member 3
A tilting rod 41 fixed to the front end of the base 31 of the moving block 40 is rotatably supported by the moving block 40. Then, the operation rod 36 is operated by the operation knob 36a.
When the moving block 40 rotates, the moving block 40 connects both threaded portions 3.
8 and 39, the base 31 of the guide member 30 rotates about the shaft 32 together with the tilting rod 41, and the guide rod 34 also rotates as shown by the imaginary line in FIG. The upward position of the guide surface 35 changes.

As shown in FIGS. 1 and 2, a packaging bag transfer member 42C is provided between the support claws 7 of both the left and right main chains 4.
(Other transfer members 42A and 42B also have the same structure) are supported. In this transfer member 42C,
Support arm 43 and rotation arm 44 on both left and right sides
are supported at their upper ends by a shaft 45 so as to be rotatable in the front-rear direction, and a fixed clamping plate 46 is installed between both support arms 43 and between the rotation arms 44 so as to extend in the left-right direction. Fixed clamp plate 4
A pair of bifurcated movable clamping plates 48 are each supported on a guide shaft 47 which is supported on the upper surface of the guide shaft 6 so as to extend in the left-right direction and are movable in the axial direction. A clamping arm 49 of each movable clamping plate 48 extending downward from the inside of the guide shaft 47 is adapted to abut on the inside of the fixed clamping plate 46 . Further, a cam roller 51 is supported by a slide shaft 52 on a movable arm 50 of each movable clamping plate 48 extending from the guide shaft 47 to the outside of the fixed clamping plate 46 . When moving in the left-right direction, the cam roller 51 also moves in the left-right direction along this slide shaft 52 together with the movable arm 50. Both left and right ends of the slide shaft 52 are biased by a spring 53, and due to this bias, the clamping arm 49 of the movable clamping plate 48 and the fixed clamping plate 46 are always closed. The support arm 43, the rotating arm 44, the fixed clamping plate 46, the movable clamping plate 48, etc. constitute a clamp section. A support shaft 54 is protruded from the upper part of the support arm 43, and a guide roller 55 is supported at the center thereof, and the tip thereof is removably engaged with the support recess 8 of the support claw 7 of the main chain 4. A support pin 56 is attached which is supported by the support pin 56.

Links 57 and 58 are supported at the lower portions of the support arm 43 and the rotation arm 44 so as to be rotatable in the front and rear directions by a shaft 59, and the upper ends of both links 57 and 58 are rotatably supported by a shaft 60. At the same time, a pressure roller 61 (engaging portion) is supported on the same shaft 60. A spring 62 is connected between the shafts 59 at the lower ends of both the links 57 and 58, and the support arm 43 and the rotating arm 44 are always closed together with the links 57 and 58 due to the biasing force of the spring 62.

This transfer member 42C has its support pin 5
6, the main chain 4 is supported by the support claw 7.
When the support claw 7 reaches the top of the front chain wheel 2 as shown by the imaginary line in FIG. The guide roller 55 is placed on the guide groove 9a of the guide rail 9. Further, as the main chain 4 rotates, the guide roller 55 rolls on the guide groove 9a, and the support pin 56 moves along the guide groove 9a to draw a movement locus L (see FIG. 8). Guide roller 55
When the support shaft 54 of the third feed pawl 14 hits the third feed pawl 14, the third feed pawl 14 tilts backward about the shaft 15 against the bias of the spring 16, as shown by the imaginary line in FIG. goes further. As shown by the solid line in FIG.
By the time the support claw 7 moves next to the front chain wheel 2 and the front chain engagement plate 5, it moves diagonally downward so as to draw a movement trajectory M along the main chain 4 between the front side chain wheel 2 and the front side chain engagement plate 5, and both movement paths L, Since the distance M is widened, the support pin 56 comes out of the support recess 8 of the support claw 7 upward, and the transfer member 42 shown in FIG.
C once leaves the main chain 4 and stops on the guide rail 9. At this time, the transfer member 4
The 2C pressing roller 61 is located below the front inclined portion 35a of the guide surface 35 of the guide rod 34, and the support arm 43 and the rotating arm 44 are still closed.

Next, when the lever 17 tilts backward as shown in FIG.
3 and 14 move backward, and as shown in FIG.
As shown in FIG. 11, the support pin 56 advances parallel to the main chain 4 between the front and rear chain engagement plates 5 and 6 while rolling on the chain a. At this time, the support shaft 54
is the guide surface 3 of the guide rod 34 as shown in FIG.
In order to move so as to draw a movement trajectory N parallel to the horizontal part 35b of 5, the front inclined part 35a and the support shaft 54
The distance between them gradually widens. As a result, the pressing roller 61 of the transfer member 42C
a to the horizontal portion 35b and is pushed downward, both links 57 and 58 of the transfer member 42C open against the bias of the spring 62, and the support arm 43 and rotation arm 44 also open accordingly. When the support shaft 54 of the transfer member 42C enters the third stopper recess 23a, the third feed claw 14 moves to the other feed claws 12,
13, and the transfer member 42C stops here. Note that as the lever 17 tilts backward, the third stopper plate 26 projects onto the guide rail 9 together with the other stopper plates 24 and 25, and even if the support shaft 54 of the transfer member 42C passes through the third stopper recess 23a due to inertia, this will not occur. It is designed to be stopped by a third stopper plate 26.

The above describes how one transfer member 42C changes from the state shown in FIG. 1 to the state shown in FIG. 5 to the state shown in FIG. 9. However, another transfer member 42B shown in FIG. This transfer member 42 shown in FIG.
C, and moves to the position shown in FIG. 5 by the same action as the transfer member 42C.

Next, a description will be given of how the transfer member 42B shown in FIG. 5 reaches the state shown in FIG. 9. When the lever 17 tilts backward as shown in FIG.
1, each of the feed claws 12, 13, 14 moves backward,
As shown in FIG. 10, the support shaft 54 of the transfer member 42B
is pushed backward by the second feed pawl 13, and while the guide roller 55 rolls on the guide groove 9a, the support pin 56 is pushed backward by the main chain engagement plate 5, 6 between the front and rear chain engagement plates 5, 6, as shown in FIG. Proceed parallel to chain 4. At this time, since the movement locus N of the support shaft 54 and the horizontal portion 35b of the guide surface 35 of the guide rod 34 are parallel, the pressure roller 61 of the transfer member 42B
remains pushed downward by the horizontal portion 35b of the guide surface 35, and the support arm 43 and rotation arm 44
is open with both links 57 and 58. When the support shaft 54 of the transfer member 42B enters the second stopper portion 22, the second feed claw 13 moves to the other feed claw 1.
2 and 14, and here the transfer member 42B
stops. Note that the second stopper plate 25 also serves the same role as the third stopper plate 26.

This transfer member 42B shown in FIG. 9 is in the same state as the transfer member 42A shown in FIG.
It moves to the position shown in FIG. 5 by the same action as B.

Next, we will describe how the transfer member 42A shown in FIG. 5 reaches the state shown in FIG. 9. When the lever 17 tilts backward as shown in FIG.
1, each of the feed claws 12, 13, 14 moves backward,
As shown in FIG. 10, the support shaft 54 of the transfer member 42A
is pushed backward by the first feed pawl 12, and while the guide roller 55 rolls on the guide groove 9a, the support pin 56 moves the main chain between the front and rear chain engagement plates 5, 6 as shown in FIG. Proceed parallel to 4. At this time, the distance between the movement trajectory N of the support shaft 54 and the rear inclined portion 35c of the guide surface 35 of the guide rod 34 gradually becomes narrower. As a result, the pressing roller 61 of the transfer member 42A is moved from the horizontal surface 35b of the guide surface 35 to the rear inclined portion 35c, and the pressing roller 61
Since the pressure on the transfer member 42A is released, both links 57 and 58 of the transfer member 42A close due to the bias of the spring 62, and accordingly, the support arm 43 and the rotation arm 4
4 is also closed. The first feed claw 12 stops together with the other feed claws 13 and 14 when the support shaft 54 of the transfer member 42A enters the first stopper recess 21a, and the transfer member 42A stops here. Note that the first stopper plate 24 also plays the same role as the third stopper plate 26.

In this way, when the transfer member 42A moves to the position shown in FIG. 9, the support claw 7 of the main chain 4, which has once separated from the support pin 56 of the transfer member 42C as shown in FIG. 8, moves as shown in FIG. The transfer member 42A is approached as shown in FIG. This support claw 7 moves obliquely upward so as to draw a movement locus M along the main chain 4 between the rear chain engagement plate 6 and the rear chain wheel 3, so this movement locus M and the transfer member 4
The distance between the support pin 56 of 2A and the movement locus L gradually becomes narrower, and as shown in FIGS. 12 and 13, this support pin 56 engages with the support recess 8 of the support claw 7 from above, and The illustrated transfer member 42A is again supported by the main chain 4. Before this support, the lever 17 tilts forward, and the feed claws 12, 13, 14 move forward together with the slide rod 11, and the stop plates 24, 25, 26 retreat downward from above the guide rail 9.

Thereafter, the transfer member 42A shown in FIG.
9, and only the transfer members 42B and 42C shown in FIG. 9 remain on the guide rail 9.
At the same time, the next transfer member (not shown) is sent below the front chain wheel 2, and each transfer member 42A, 42B,
One step ends with the same state as 42C. Thereafter, each step is repeated under the same action.

A steady rest roller 63 is supported by a shaft 63a at the lower part of the support arm 43 of each transfer member 42A, 42B, 42C, and is adapted to roll on a guide plate 64 provided along the main chain 4. There is.

Further, in each of the transfer members 42A, 42B, and 42C, the opening between the support arm 43 and the rotating arm 44 can be adjusted by rotating the operating rod 36 to adjust the vertical position of the guide surface 35 of the guide rod 34. This is done by changing the engagement position of the pressing roller 61 with respect to the horizontal portion 35b of the guide surface 35 in the vertical direction and adjusting the opening of both the links 57 and 58.

On the other hand, as shown in FIGS. 1 and 2, a screw jack 65 (elevating section) is provided at the lower rear side between both mounting frames 1. In this screw jack 65,
The lower ends of two links 65b are rotatably supported on a fixed fulcrum 65a, and both links 65
Another two links 65b are rotatably supported at the upper end of b via a movable fulcrum 65c, and the upper ends of both links 65b are rotatably supported via a movable fulcrum 65d, so that each link 65b A parallel link mechanism is constructed. Both moving fulcrums 6
An operation threaded rod 65 is attached to one fulcrum 65c of the 5c.
e is screwed together, and its tip is connected to the other fulcrum 65c.

A base plate 66 is fixed on the screw jack 65, and a shaft support 67 is supported on the front side thereof so as to be rotatable in the front and rear direction by a shaft 68, and a second shaft support 69 is connected to the first shaft support 67. 70 so as to be rotatable in the left and right direction. On this second shaft support 69, each of the transfer members 42A, 42B, 42
A diaphragm 71 (with artificial turf pasted on the top surface) is fixed to extend in the front-rear direction below the movement path of C. 72 is inserted through the base plate 66 and urged downward by a spring 73.

An electric motor 74 is installed on the base plate 66, and its output shaft 74a is inserted below the diaphragm 71 between the second shaft support 69 and the rod 72, and is supported on the base plate 66 by a bearing 75. There is. This output shaft 7
Eccentric cam plates 76a and 76b are provided on both the left and right sides of 4a.
(cam members) are fixed to each other in a 180 degree point-symmetrical relationship, and can engage alternately with the left and right lower surfaces of the diaphragm 71. Then, due to the rotation of the output shaft 74a of the electric motor 74, both cam plates 76a, 76
When b rotates, the diaphragm 71 simultaneously reciprocates in the front-rear and left-right directions around the first and second shaft supports 67, 69. That is, when one cam plate 76a engages with the lower right side surface of the diaphragm 71 as shown in FIG. 2, the rear edge 71a of the diaphragm 71 tilts upward as shown in FIGS. right edge 7
1c tilts upward, and the rear edge 71a and right edge 71c
The intersection corner with the front edge 71b and the left edge 7 is the highest
The intersection corner with 1d is the lowest. Next, when the other cam plate 76b engages with the left lower surface of the diaphragm 71, the diaphragm 71
At the same time as the front edge 71b of the front edge 71b tilts upward, the left edge 71d of the front edge 71b tilts upward, and the front edge 71b and the left edge 7
The intersecting corner with 1d is the highest, and the intersecting corner between the rear edge 71a and the right edge 71c is the lowest. In this way, the diaphragm 71 swings continuously so that its two intersecting corners can alternately assume the uppermost or lowermost positions. This swinging motion can be varied in various ways by changing the position of the cam plate, etc.

Further, in the screw jack 65, when the operation threaded rod 65e is rotated, one of the movable fulcrums 65c screwed thereto moves on the same threaded rod 65e, and both movable fulcrums 65c approach or separate from each other. The entire base plate 66 moves up and down. Thereby, the movement of the diaphragm 71 can be adjusted in the vertical direction.

The screw jack 65 and the first and second shaft portions 67, 69, etc. constitute a support section, and the electric motor 74, eccentric cam plates 76a, 76b, etc. constitute a drive section.

Next, each of the moving members 42A, 42B, 42C
The operation when supplying contents to the packaging bag 77 that is suspended and supported will be described.

In the state shown in FIGS. 1 to 4, the lever 17
is tilted forward, each of the feed pawls 12, 13, 14 is in a forward moving position, and each stopper plate 24, 25, 26 is retracted from above the guide rail 9. The support shaft 54 of the transfer member 42A is placed in the second stopper recess 22a, and the support shaft 54 of the transfer member 42B is placed in the third stopper recess 23a.
B is stopped on the guide rail 9. Below the front chain wheel 2, the transfer member 42C is supported by the main chain 4 and is on its way up. Both transfer members 42A and 42B are placed on the guide rail 9.
The support arm 43 and the rotating arm 44 are open to each other, and the opening 78 of the packaging bag 77 held by the clamping plates 46 and 48 is also open, and the contents have already entered the packaging bag 77 through the opening 78. It is being
Further, in the transfer member 42C, both arms 43 and 44 are closed to each other, and the opening 78 of the packaging bag 77 is also closed.

From this state, the transfer member 42C is transferred from the main chain 4 onto the guide rail 9 due to the separation between the support claw 7 and the support pin 56, as shown in FIGS. 5 to 8, and both arms 43 and 44 are closed to each other. Each transfer member 42 is placed on the guide rail 9.
A, 42B, and 42C are lined up in order.

Next, as shown in FIGS. 9 to 11, when the lever 17 tilts backward and the respective feed claws 12, 13, and 14 move backward,
Each transfer member 4 is
The support shafts 54 of 2A, 42B, and 42C are pushed rearward to the first, second, and third stopper recesses 21, respectively.
a, 22a, 23a, and each transfer member 42
A, 42B, and 42C stop while being lined up with each other on the guide rail 9. At this time, each stopper plate 2
4, 25, and 26 protrude onto the guide rail 9.
Both arms 43 and 44 of the transfer member 42A close together, and the opening 78 of the packaging bag 77 also closes. In the transfer member 42B, the opening 78 of the packaging bag 77 remains open. In the transfer member 42C, both arms 4
3 and 44 open each other, the opening 78 of the packaging bag 77 also opens, and the contents are immediately put into the packaging bag 77.

During this feeding of the contents, the lever 17 is tilted forward as shown in FIGS.
4 moves forward and each stopper plate 24, 25,
26 is retracted from above the guide rail 9, and the transfer member 42A is transferred from the guide rail 9 to the main chain 4 by engagement between the support claw 7 and the support pin 56, and rises above the rear chain wheel 3. Along with this ascent, another transfer member (not shown) is in the process of ascent below the front chain wheel 2, resulting in the same state as in FIG. 1. Thereafter, the supply of the contents is repeated under the same action.

On the other hand, the diaphragm 71 continues to vibrate and strikes the bottom of the storage portion 79 of the packaging bag 77 to which the stored items have been supplied from below. Therefore, the contents are reliably packed into the packaging bag 77. In particular, the diaphragm 71
not only applies vibrations to the bottom of the housing portion 79 in the vertical direction from directly below it, but also can apply vibrations from both left and right sides of the bottom and both front and back sides of the bottom, so that vibrations in the vertical, horizontal, and front and rear directions are combined. Due to the combined vibration, the contents of the packaging bag 77 are further tightened.

Effects of the Invention In short, according to the present invention, the opening 7 of the packaging bag 77
Both clamp parts 43, 44, 46, 4 that grip 8
Since both links 57 and 58 were used to open and close 8,
Even when the packaging bag transfer members 42A, 42B, and 42C move laterally, opening and closing of the opening portion 78 can be performed with a simple structure as the transfer members 42A, 42B, and 42C move. By adjusting the distance between the guide surface 35 of the guide member 30 and the movement trajectory L of the transfer members 42A, 42B, and 42C via the adjustment member 36, the opening 78 of the packaging bag 77 can be easily adjusted.
The opening degree can be changed and adjusted.

[Brief explanation of the drawing]

1 to 13 show one embodiment of the present invention.
Figures 5 and 9 are longitudinal cross-sectional views of the contained material supply device shown according to the positions of the respective transfer members, Figure 2 is a cross-sectional view taken along the line X--X of Figure 1, Figures 3 and 9 are 4
The figure is a partially cutaway sectional view of Fig. 1, Fig. 6 is a sectional view taken along the Y-Y line of Fig. 5, Figs. 7 and 8 are partially cutaway sectional views of Fig. 5, and Figs. Figure 11 is a partially cutaway sectional view of Figure 9, Figures 12 and 13 are
A partially cutaway sectional view showing a state immediately before the transfer member is transferred to the main chain from the state shown in the figure,
14 to 18 show the prior art, FIG. 14 is a schematic side view showing the entire bag filling and packaging machine, FIG. 15 is a front view of the bag opening/closing device, and FIG. 16 is a side view as well.
FIGS. 17 and 18 are partial sectional views showing the opening and closing action of the packaging bag in the same device. Main chain 4, chain engagement plates (interval changing member) 5, 6, support claw (support member) 7, support recess (support part) 8, guide rail 9, slide rod 11,
Feed claws 12, 13, 14, stopper recess 21a,
22a, 23a, stopper plates 24, 25, 26,
Guide rod 34, guide surface 35, operating rod 36, transfer members 42A, 42B, 42C, support arm 43,
Rotating arm 44, fixed clamp plate 46, movable clamp plate 4
8. Support shaft 54, guide roller 55, support pin (support part) 56, links 57, 58, press roller (engaging part) 61, spring 62, screw jack (lifting part) 65, shaft support 67, 69, vibration plate 71, electric motor 74, eccentric cam plate (cam member) 76a,
76b, packaging bag 77, mouth part 78, storage part 79,
Movement trajectory L, M, N.

Claims (1)

[Scope of Claims] 1. Transfer members 42A, 42 in which a pair of clamp parts 43, 44, 46, 48 that grip the opening 78 of a packaging bag 77 are supported by a shaft 45 so as to be mutually openable and closable.
B, 42C, and a pair of clamp parts 43, 44, 46, and 48 whose distal ends are rotatably supported by a shaft 59, and whose proximal ends are supported by a shaft 60 so as to be mutually openable and closable. link 57,
58, and both the links 57 and 58 are connected to the both clamp portions 4.
3, 44, 46, and 48, and a spring 62 that always biases the transfer members 42A, 42B, and 42C so as to close each other. The guide surface 35 has a guide surface 35 that can be engaged with the engaging portions 61 provided on the links 57 and 58, and the guide surface 35 has a portion 35a whose distance from the movement trajectory L gradually increases. a guide member 30 provided with a portion 35c that gradually becomes smaller; and an interval adjustment member 36 that adjusts the amount of proximity movement of the guide member 30 with respect to the movement trajectory L, and changes and adjusts the distance between the guide surface 35 and the movement trajectory L. An opening/closing device for a content supply opening in a bagging and packaging machine, characterized by comprising: