JP2001278222A - Horizontal sealing device of horizontal bag-making and filling machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the high seal pressure, to maintain a longer abutting period at a predetermined holding pressure of a seal body, and to suppress generation of large noise and vibration when the seal body is abutted with a simple configuration. SOLUTION: A pair of seal bodies 15, 16 are slidably disposed on a pair of slide rail in a horizontally movable manner. An opening/closing cam 55 and a servo motor 50 are disposed on a drive shaft 48 of the support frame 36. The pair of seal bodies 15, 16 are advanced to and separated from each other by a toggle mechanism 46 connected to the cam 55 by rotating the drive shaft 48 and the opening/closing cam 55 by the servo motor 50. The support frame 36 is horizontally moved by a horizontally moving means 45 operated by the rotation of the servo motor 50 so that the pair of seal bodies 15, 16 are horizontally moved forward and backward in the transferring direction of a cylindrical film 31.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a horizontal sealing device for a horizontal bag making and filling machine, and more particularly, to a pair of seals which move in the transport direction together with the transport of a tubular film and move toward and away from each other. The present invention relates to a horizontal sealing device that seals a cylindrical film by pressing the cylindrical film from both sides.

[0002]

2. Description of the Related Art A horizontal bag making and filling machine sequentially supplies articles to be packaged into a tubular film which is formed into a tubular shape by a bag making machine and which is transported horizontally, and a longitudinal edge of the tubular film. A so-called pillow package can be manufactured by applying a vertical seal to the superposed surface of the portion and performing horizontal seal / cut before and after sandwiching the packaged object of the tubular film.

In a horizontal sealing device for performing horizontal sealing and cutting,
A pair of seals vertically opposed to each other across the transfer path of the tubular film is provided, and the two seals are held in contact with each other in a state where the tubular film is sandwiched. A so-called box-motion type is preferably used, in which a horizontal movement is performed synchronously horizontally to seal, and then retreats away from each other and repeats a horizontal movement again by abutting each other.

Conventionally, as this type of horizontal sealing device, one having a configuration disclosed in Japanese Patent Application Laid-Open No. 9-301325 filed by the present applicant has been proposed. This device is
The upper and lower seals are connected to a drive mechanism including first, second, and third gears provided to mesh with each other in the vertical direction, and a planetary gear mechanism attached to each gear. After the tubular film is sandwiched, it is horizontally moved synchronously along the transport direction of the tubular film to perform sealing, and then moves away from each other, retreats, and moves again to move horizontally. It is configured to repeat.

[0005]

According to the above-mentioned horizontal sealing device, a pair of seals can be moved along a movement locus having a substantially straight contact portion along a film transport path. A good seal is achieved by keeping the clamping pressure when the seal body abuts substantially constant. Further, at the time when the two seals start contacting, the velocity component in the direction in which the seal surfaces face each other is small, and it is possible to preferably suppress the generation of large noise and vibration due to the impact when the two seals contact. Can be appreciated.

However, since the transverse seal device employs a structure related to a plurality of gear mechanisms, the size of the device is increased, the structure is complicated, maintenance is inferior, and the manufacturing cost is relatively high. The difficulty is pointed out.

[0007]

SUMMARY OF THE INVENTION In view of the above-mentioned drawbacks, the present invention has been proposed in order to solve the above-mentioned problems, and it is possible to obtain a high sealing pressure and a contact period of a sealing body at a constant clamping pressure. The present invention aims to provide a horizontal sealing device for a horizontal bag-making and filling machine having a simple structure capable of maintaining the pressure for a longer time and suppressing the generation of loud noise and vibration at the time of the contact of the seal body.

[0008]

SUMMARY OF THE INVENTION In order to overcome the above-mentioned problems and appropriately achieve the intended object, a horizontal sealing device for a horizontal bag making and filling machine according to the present invention comprises a tubular sealing device filled with articles to be packaged. The pair of seals, which are disposed vertically facing each other across the film transfer path, move in the transfer direction along with the transfer of the cylindrical film, and move close to and away from each other, move the cover of the cylindrical film. In a horizontal sealing device of a horizontal bag making and filling machine for sealing before and after sandwiching a package, a support frame in which the pair of seal bodies are slidably disposed, and a drive rotatably supported by the support frame. An opening / closing cam integrally rotatably arranged on a shaft, a toggle mechanism linked to the opening / closing cam for opening and closing the pair of seals, and a toggle mechanism arranged on the support frame to rotationally drive the drive shaft. Drive motor and the front A slide rail for supporting the support frame so as to be able to move horizontally in the transport direction of the tubular film; and a horizontal moving means which is actuated by the drive motor to move the support frame horizontally along the slide rail. It is characterized by the following.

[0009]

When the drive shaft provided on the support frame is rotated by the drive motor, a toggle mechanism connected to an opening / closing cam which rotates integrally with the drive shaft is operated, and is slidably provided on the support frame. The pair of seals thus opened and closed. Further, the horizontal moving means is operated by the driving motor, and the support frame is horizontally moved so that the pair of seals is horizontally moved in the front and rear direction of the transfer of the tubular film. That is, the pair of seals abut against each other on the upstream side in the film transport direction, move horizontally downstream in this abutting state, and then repeat the movement of moving away from each other and horizontally moving downstream. At the time of the contact, the tubular film is sandwiched and sealed. Further, when the height dimension of the packaged object is changed, the height adjustment means adjusts the height position at which the pair of seal members abut, thereby changing the sealing position with respect to the tubular film.
Further, when the cut pitch or the packaging speed of the film is changed, it can be dealt with by controlling the speed of a servomotor as a driving motor.

[0010] In the article delivery conveyor provided on the upstream and downstream sides of the position where the seals are disposed, the tip of the conveyor directed toward the seals relatively moves toward and away with the opening and closing operations of the pair of seals. In addition, the opening and closing operation of the seal body is allowed, and reliable delivery of the packaged object is achieved.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a horizontal sealing device for a horizontal bag making and filling machine according to the present invention will be described below with reference to the accompanying drawings by way of preferred embodiments.

FIG. 1 and FIG. 2 show the overall structure of a horizontal sealing device of a horizontal bag making and filling machine according to an embodiment of the present invention, in which a pair of sides separated in a width direction intersecting with a film transport direction. The machine frames 12 are formed by connecting the unit frames 10 and 10 with a plurality of connecting members 11. A first transfer conveyor 13 is disposed on the upstream side (left side in FIG. 1) of the machine frame 12 in the film transfer direction, and the first transfer conveyor 13 and the transfer level are set on the downstream side (right side in FIG. 1). A matched second transfer conveyor 14 is arranged in series. And both conveyors 13 and 14 as an article delivery conveyor
Between the opposing ends of the
(Opening / closing operation) Upper (one) first first seal body 15 and lower side
A lateral sealing device 17 including the (other) second sealing body 16
Is arranged.

Prior to the description of the horizontal sealing device 17, the configuration of the first transfer conveyor 13 and the second transfer conveyor 14 will be briefly described. As shown in FIG. 2, on the upper part of the machine casing 12 on the upstream side of the position where the horizontal sealing device 17 is disposed,
A first fixed frame 18 including a pair of side plates separated by a predetermined distance in the width direction is provided. Also, the first fixed frame 18
A first movable frame 19 formed in a U-shape that is open downward from a pair of side plates facing each other and spaced apart from each other in the width direction at an interval smaller than the interval between the side plates.
However, the first fixed frame 18 is disposed so as to be able to move horizontally in the film transfer direction. Further, a plurality of pulleys 20 are rotatably supported on the first fixed frame 18, and a plurality of pulleys 21 are also rotatably supported on the first moving frame 19, between the pulleys 20, 21. First
An endless belt 22 is runably wound around the first transfer conveyor 13. The pulley 20 at a predetermined position provided on the first fixed frame 18 has the frame 1
The first endless belt 22 travels in a required direction by rotating a pulley 20 in the required direction by the motor 23.

The second transfer conveyor 14 is configured symmetrically with the first transfer conveyor 13 with a horizontal sealing device 17 interposed therebetween. That is, a second fixed frame 24 composed of a pair of side plates separated by a predetermined distance in the width direction is disposed above the machine frame 12. A second movable frame formed inside the second fixed frame 24 in a U-shape that is opened downward from the pair of side plates and the upper plate that are spaced apart in the width direction at an interval smaller than the interval between the side plates and open downward from the upper plate. 25 is the second
It is arranged so as to be able to move horizontally in the film transport direction with respect to the fixed frame 24. Further, the second fixed frame 2
4, a plurality of pulleys 26 are pivotally supported so as to be rotatable,
A plurality of pulleys 27 are also pivotally supported on the second moving frame 25, and a second endless belt 28 is wrapped around the pulleys 26, 27 so as to run, and the second transfer conveyor 14 is moved.
Is configured. A second motor 29 disposed below the frame 24 is connected to the pulley 26 at a predetermined position disposed on the second fixed frame 24, and the pulley 26 is rotated in a required direction by the motor 29. Second by
The endless belt 28 runs in a required direction.

In the first transfer conveyor 13, the first endless belt 22 is set so as to run in a required direction at substantially the same speed as the film transfer speed. The cylindrical film 31 filled with
It is transferred to the horizontal sealing device 17. Further, in the second transfer conveyor 14, the second endless belt 28 is set to be faster than the traveling speed of the first endless belt 22,
The preceding package, which has been horizontally sealed and cut by the two sealing bodies 15 and 16 of the horizontal sealing device 17, can be reliably separated from the subsequent unpackaged body and discharged.

A second support member 44 (described later), which is located below a transfer path (film transfer path) of the cylindrical film 31 and horizontally supports the second seal body 16, has a structure shown in FIGS. , A pair of connecting rods 32 as opening and closing means,
33 are pivotally supported at one end. The other end of the upstream first connecting rod 32 is rotatably supported by the first moving frame 19, and the other end of the downstream second connecting rod 33 is connected to the second moving frame 25. It is pivotally supported. That is, in a state where the second seal body 16 is located at the lowest point, the tips of the first moving frame 19 and the second moving frame 25 that direct the seal bodies 15 and 16 are close to each other, and the second seal body 16 is When ascending, the leading ends of the two moving frames 19 and 25 are separated from each other (see FIG. 1) to form a gap that allows the second seal body 16 to rise, and when the second seal body 16 descends from the uppermost point. Are configured so that the tips of both moving frames 19 and 25 move close to each other.

Next, the configuration of the horizontal sealing device 17 will be described. As shown in FIG. 4, a fixed shaft 34 extending in the width direction is disposed below the first transfer conveyor 13 in the machine frame 12, and is separated from the fixed shaft 34 in the axial direction (width direction). A pair of holding members 35, 35 pivotally support one end in the longitudinal direction so as to be rotatable. Between the two holding members 35, 35, the first transfer conveyor 13 and the second transfer conveyor 1 are provided.
4, a supporting frame 36 is held via holding connecting rods 37, which will be described later. As shown in FIG. 3, the support frame 36 includes a pair of rectangular box frame-shaped support frames 36a, 36a connected by a plurality of connecting members 36b, 36b spaced apart in the width direction and provided between the opposing surfaces thereof. A side plate 47 is provided on the outer side surface of each support frame 36a and extends downward by a predetermined length.

Each support frame 36a of the support frame 36
A slide shaft (slide member) 38 having a predetermined length is slidably inserted and supported in a vertical direction, and a pair of slide shafts 38 extending downward from both support frames (support portions) 36a, 36a. The lower end of the first support member 39
Are connected by In addition, a holder 40 is provided between the upper ends of the slide shafts 38, 38 extending upward from the support frames 36a, 36a and facing above the film transfer path so as to be vertically movable. In addition, the first seal body 15 is disposed with the seal surface directed to the transfer path of the tubular film 31. The holder 40 is urged downward by springs 41, 41 as elastic members wound around the slide shafts 38, 38 so as to always contact stoppers 42, 42 provided on the shafts 38, 38. It has become so. And the springs 41, 41
When the first seal body 15 and the second seal body 16 come into contact with each other, the first seal body 15 and the holder 40 are allowed to retreat upward, and the cylindrical film It functions to keep the clamping pressure of 31 substantially constant. Further, a cutter 43 is disposed on the first seal body 15, and is configured to cut the tubular film 31 when the first seal body 15 comes into contact with the second seal body 16.

Between the support frame 36 and the holder 40, a second support member 44 parallel to the holder 40 can move up and down on the slide shafts 38, 38 (relative to the first support member 39). (Can be moved close to or away from). On the upper surface of the second support member 44, a second seal member 15 is opposed to the first seal member 15 in parallel with the film transfer path therebetween.
A seal body 16 is provided with its sealing surface directed to the film transport path. Then, by operating a horizontal moving means 45 described later, the pair of seals 1
The upper and lower seals 15 and 16 move toward and away from each other by operating the toggle mechanism 46 to be described later, while the cylinders 5 and 16 move horizontally before and after in the film transport direction. By sandwiching and abutting, the film 31 is configured to perform a horizontal seal under a predetermined pressure.

The pair of side plates 47, which are disposed on both sides in the width direction of the support frame 36 and extend downward by a predetermined length,
As shown in FIG. 3, a drive shaft 48 is rotatably provided between lower ends of 47. One (right side in FIG. 3) side plate 47
Is provided with a servomotor 50 as a drive motor via a bracket 49, and a drive gear 51 provided on an output shaft of the motor 50 meshes with a driven gear 52 provided on the drive shaft 48. are doing. Also, between the side plates 47, 47,
A shaft 53 parallel to the drive shaft 48 is provided, and a follower 54 a provided at one end of a cam lever 54 pivotally supported by the shaft 53 is provided so as to rotate integrally with the drive shaft 48. Cam groove 5 formed in opening / closing cam 55
5a.

As shown in FIG. 3, a link shaft 56 is provided between the pair of support frames 36a, 36a of the support frame 36.
Is rotatably mounted, and a link member 57 is rotatably supported by the link shaft 56. The link member 5
7, the other end of a first connecting rod 58, one end of which is rotatably supported on the upper surface of the first support member 39, is rotatably supported, and a link is provided. Upper end of member 57
At the other end, the other end of a second connecting rod 59 whose one end is rotatably supported on the lower surface of the second support member 44 is rotatably supported. Further, the first
One end of the link rod 60 is rotatably supported near the pivot position of the connecting rod 58 (position deviated from the pivot of the link member 57), and the other end of the link rod 60 has The other end of the cam lever 54 is rotatably supported (connected). That is, by rotating the drive shaft 48 by the rotational drive of the servo motor 50, the cam lever 54 that engages with the cam groove 55a of the opening / closing cam 55 via the follower 54a swings, and the other end of the lever 54 The link member 57 swings via a link rod 60 whose part is pivotally supported. As a result, the first and second connecting rods 58,
The first support member 39 and the second support member 44 connected via 59 move toward and away from each other, and as a result, the upper and lower seal members 15 and 16 move toward and away from each other (vertical movement). It has become. The toggle mechanism 46 includes the link member 57, the first connecting rod 58, the second connecting rod 59, and the link rod 60. The cam groove 55a
Is a cam shape that operates the toggle mechanism 46 so that the first seal body 15 and the second seal body 16 are brought closer to each other at the timing of moving to the most upstream side and separated from each other at the timing of moving to the most downstream side. Is set.

Each side frame 10 in the machine frame 12
A pair of guide plates 70, 70 extending in the up-down direction are disposed in parallel on the inner side surface (the surface facing the other side frame 10) of the pair, separated from each other in the film transfer direction. Slide member 71 having a substantially T-shape between 70, 70
Is vertically slidably disposed.
(See FIG. 5). A pair of holding plates 72, 72 for holding the inner surface of the vertical portion 71a of the slide member 71 are vertically spaced between the two guide plates 70, 70, and slide from the two guide plates 70, 70. The structure is such that the member 71 does not come off.

Slide rails 73, 77 extending a predetermined length in parallel with the film transfer direction are provided on the inner surfaces of the horizontal portions 71b, 71b of the slide members 71, 71 provided on the left and right in FIG. Has been established. In the vicinity of the upper ends of the side plates 47, 47 corresponding to the slide rails 73, 77, mounting plates 74, 74 extending in parallel with the film transport direction are provided. A pair of guide rollers 75, 76, 78, 79 vertically separated from each other are rotatably disposed at positions separated from each other. The guide rollers 75, 7 forming a pair
6 and guide rollers 78, 79 are arranged with the corresponding slide rails 73, 77 sandwiched from above and below. That is, the support frame 36 is configured to be able to move horizontally in the film transport direction along a pair of left and right slide rails 73 and 77.

The slide rail 77 provided on the left side in FIG. 3 has a convex portion 77a formed in parallel on the upper surface and a concave portion 77b formed in parallel on the lower surface. A pair of flanges 78a, 78a provided on the upper left guide roller 78 sandwich the convex portion 77a, and the lower left guide roller 79 is positioned in the concave portion 7a.
The support frame 36 is configured to be prevented from being displaced from the movement path when the support section frame 36 is horizontally moved by being disposed so as to be fitted into the inside 7b.

The machine frame 12 is provided with a holding shaft 80 above the fixed shaft 34 and parallel to the fixed shaft 34. The holding shaft 80 has a swing lever as shown in FIG. A pivot 62 pivotally supports one end in the longitudinal direction. Further, one side of the support frame 36 (FIG. 3)
Link shaft 56 facing the inside of the support frame 36a
A disc-shaped rotary plate 61 as a crank member is disposed so as to rotate integrally therewith. At the eccentric position of the rotary plate 61, the other end of the swing lever 62 is pivotally supported. Have been. Further, a driven sprocket 81 is provided so as to be rotatable integrally with the link shaft 56 facing the other support frame 36a, and an endless chain 82 wound around the driven sprocket 81 is provided so as to be rotatable integrally with the drive shaft 48. It is wound around the driving sprocket 83 provided. When the drive shaft 48 is rotated by the rotation of the servo motor 50, the rotary plate 61 is rotated via the endless chain 82 and the sprockets 83 and 81, and the support frame is rotated by the crank motion of the swing lever 62. 36 moves horizontally along a pair of slide rails 73, 77, whereby the pair of seals 15, 16 move horizontally before and after in the film transport direction. The horizontal moving means 45 is composed of the rotating plate 61, the swing lever 62, and the slide rails 73 and 77.

That is, in this embodiment, the drive shaft 48 is rotated by the servo motor 50, thereby the horizontal moving means 4 is rotated.
5 and the toggle mechanism 46 are activated, and the first seal 1
5 and the second seal body 16 abut against each other on the upstream side in the film transport direction, move horizontally downstream in this abutting state, and then move away from each other and horizontally move upstream.
(Box motion) is repeated. In addition, the seal body 15,
The moving speed in the film transfer direction in the contact state of No. 16 is
The servo motor 50 is driven at substantially the same speed as the film transport speed.
Is set so that the rotation is controlled. Further, the servomotor 50 changes the speed according to the film cutting pitch set in accordance with the size of the packaged object 30, the transfer speed of the tubular film 31 obtained from the desired packaging speed, and the set packaging speed. It is set to be controllable.

One end of the holding connecting rod 37 is rotatably supported by the vertical portion 71a of each of the slide members 71, and
The other end of the holding connecting rod 37 is rotatably supported by the corresponding holding member 35 so that the support frame 3
6 is held between the pair of holding members 35. Between the free ends opposite to the pivot end with the machine frame 12 with the holding portions of the support frame 36 between the two holding members 35, 35, a strut 63 is provided between the free ends (part separated from the pivot end). A support rod 64 parallel to the support member 63 is rotatably provided between the both side frames 10 and 10 of the machine frame 12 facing the support member 63 under the support member 63. . An adjusting screw 65 extending in the up-down direction is rotatably disposed at the center of the supporting rod 64 in the mounting direction.
Are screwed into female screw holes 66 formed at the corresponding positions.
An adjusting operation handle 67 is provided at the lower end of the adjusting screw 65. By rotating the handle 67 in the forward and reverse directions, a screwing action by the adjusting screw means including the adjusting screw 65 and the female screw hole 66 is performed. Below, a pair of holding members 35, 35 swing vertically about the fixed shaft 34 as a fulcrum. The pair of slide members 71, 71 held by the holding members 35, 35 via the holding connecting rods 37, 37 vertically move along the guide plates 70, 70, whereby the pair of slide members 71, 71 are moved. The height position at which the seal bodies 15, 16 abut can be adjusted. The holding members 35, 35, the support member 63, the female screw hole 66, and the adjusting screw 6
5 constitutes a height adjusting means 68.

[0028]

Next, the operation of the horizontal sealing device of the horizontal bag making and filling machine according to the embodiment will be described. The seals 15 of the first moving frame 19 of the first transfer conveyor 13 and the second moving frame 25 of the second transfer conveyor 14, respectively.
In the horizontal seal device 17, the first seal body 15 and the second seal body 16 are separated from each other and allowed to pass through the cylindrical film 31, while the leading ends directed toward the cylinder 16 are close to each other. Shall be

The cylindrical film 31 filled with the articles 30 placed on the first transfer conveyor 13 is transferred downstream by the first endless belt 22 running at substantially the same speed as the film transfer speed. . The horizontal sealing device 17 is driven by the servo motor 50 to move the horizontal moving means 45 and the toggle mechanism 4.
6 is operated at a required timing, and the first seal body 15 and the second seal body 16 move horizontally to the upstream side and then approach each other. That is, the drive shaft 48 is rotated by the servo motor 50, and the crank motion of the swing lever 62 connected to the rotating plate 61 rotating via the drive sprocket 83, the endless chain 82, the driven sprocket 81 and the link shaft 56, The support frame 36 horizontally moves along the pair of slide rails 73 and 77, and the first seal body 15 and the second seal body 16 horizontally move upstream. In addition, at the timing when the support frame 36 moves to the upstream side in FIG. 1, the link member 57 is moved by the swing of the cam lever 54 that engages with the opening / closing cam 55 that rotates integrally with the drive shaft 48. , The first seal member 15 descends as the first support member 39 connected via the first coupling rod 58 descends with respect to the support frame 36, and the second coupling rod As the second support member 44 connected via 59 is raised with respect to the support frame 36, the second seal body 16 is raised. Thereby, the first seal body 15 and the second seal body 16
Comes into contact with the tubular film 31 interposed therebetween. In addition,
In conjunction with the movement of the second support member 44, the first and second
The moving frames 19 and 25 of the transfer conveyors 13 and 14 move away from each other to define a gap that allows the second seal body 16 to extend upward.

The seal members 15 and 16 are higher and more constant because the link member 57 of the toggle mechanism 46, the first connecting rod 58 and the second connecting rod 59 are aligned in a straight line as shown in FIG. In a state where the cylindrical film 31 is abutted by the sealing pressure (nipping pressure), the cylindrical film 31 is horizontally moved downstream at substantially the same speed as the film is transported, whereby a reliable horizontal seal is applied to the film 31. When the two seals 15 and 16 come into contact with each other, the first seal 15 retreats upward together with the holder 40 against the elasticity of the springs 41 and 41, and the first seal 15 is moved by the elasticity of the springs 41 and 41. It moves while being pressed against the two seals 16. In this case, both seals 15, 16
The horizontal seal device 17 moves horizontally to the downstream side in a state in which the seal members 15 and 16 remain in contact with each other on the upstream side.
This can prevent the occurrence of a defective seal due to a change in the squeezing pressure caused by the pressure. In addition, since the opening and closing movement of the two seals 15 and 16 is operated by the cam action of the opening and closing cam 55, and the horizontal movement is operated by the servomotor 50, the contact time between the two seals 15 and 16 is increased. At the same time, when the seal members 15 and 16 are in contact with each other, the seal members 15 and 16 can be operated so as to make contact at a speed that can suppress the collision sound. It is to be noted that the cutter 4 is held in a state where the two seals 15 and 16 are in contact with each other.
3 operates to cut the tubular film 31.

As a result of the opening / closing cam 55 and the rotating plate 61 further rotating in the required direction together with the drive shaft 48, the horizontal moving means 45 and the toggle mechanism 46 act to horizontally push the tubular film 31 downstream while clamping it. The moved first seal body 15 and second seal body 16 are separated from each other to release the tubular film 31. The package obtained by performing the horizontal sealing and cutting by the horizontal sealing device 17 is quickly transferred from the arrangement position of the horizontal sealing device 17 to the downstream side by the second transfer conveyor 14 that is operated at a high speed. . Further, the moving frames 19 and 25 come close to each other in conjunction with the lowering of the second seal body 16, so that the next transfer of the packaged object 30 from the first transfer conveyor 13 to the second transfer conveyor 14 can be smoothly performed. Done.

The packaged object 30 may be changed by changing the order.
When the height dimension of the adjusting screw 65 is changed, the adjusting operation handle 67 is rotated in a required direction so that the pair of holding members 35, 35 are fixed under the screwing action of the adjusting screw 65 and the female screw hole 66. The support frame 36 vertically moves with the support 34 as a fulcrum, thereby vertically moving the support frame 36 so that the height position at which the two seals 15 and 16 come into contact is set at the intermediate position in the height direction of the packaged object 30. Can be adjusted. Therefore, the horizontal sealing position of the film with respect to the packaged object 30 can always be set at the middle of the height direction. Further, when the product type or the packaging speed is changed, the set value of the control data of the servomotor 50 can be changed.

[0033]

[Modification] In the embodiment, the height adjusting means for adjusting the height position at which the pair of seal members contact each other is adjusted by swinging the holding member. It may be configured to move up and down in the vertical direction. Further, the horizontal moving means of the seal body is formed by a pair of swing lever and a rotary plate, for example, with reference to the center of the separation distance between both slide shafts of the seal body,
Horizontal moving means in which a pair of a swinging lever and a pair of rotating plates are arranged at symmetric positions on the left and right sides thereof can be employed. Further, the horizontal moving means provided on the upper side of the support frame may be arranged at a required position of the drive shaft in the lower portion of the support frame, or a pair may be provided on one or both of the outer sides of both sides of the drive shaft. A configuration in which the swing lever and the rotating plate are formed may be provided. The crank member is not limited to the rotating plate shown in the embodiment, but may be an arm-shaped one. As a mechanism for transmitting the rotational force from the servomotor to the horizontal moving means, in addition to the combination of the chain and the sprocket of the embodiment, a combination of a belt and a pulley and other mechanisms can be appropriately adopted.

The opening / closing cam for operating the toggle mechanism includes:
Various cams such as a plate cam and a cylindrical cam are not limited to the front cam having the cam groove provided on the side surface of the rotary plate as in the embodiment. Further, the support frame is not limited to the configuration of the embodiment, and may have another configuration such as a U-shaped frame that opens downward. Further, in the embodiment, the first seal member is arranged to be vertically movable with respect to the first support member and is configured to be urged by a spring. However, the second seal member can be vertically moved with respect to the second support member. And the second seal may be biased by a spring.

[0035]

As described above, according to the horizontal sealing device of the horizontal bag making and filling machine according to the first aspect of the present invention, the pair of seals are moved horizontally in the film transfer direction without using a plurality of gear mechanisms. Since the horizontal moving means and the toggle mechanism for opening and closing are operated by a single drive motor, the configuration of the apparatus itself can be simplified, the manufacturing cost can be reduced, and the maintainability is improved. In addition, since the pair of seals are opened and closed by the toggle mechanism, a high sealing pressure can be obtained. By the operation, the period in which the seal body is in contact with a constant clamping pressure can be maintained for a longer time, the sealing strength can be increased, and a package body having a better-looking seal portion can be manufactured. Further, generation of loud noise or vibration caused by an impact when the two seals come into contact with each other can be suitably suppressed.

According to the second aspect of the present invention, since the height adjusting means for adjusting the height position at which the pair of seal members abut is provided, the contact height position of the seal members is adjusted according to the height of the article to be packaged. Can be changed and adjusted, and the setting can be adjusted according to various kinds of packaged objects. According to the third aspect of the present invention, the horizontal movement means having a simple configuration including the crank member, the swing lever, and the slide rail can more reliably horizontally move the support frame. According to the fourth aspect of the invention, by adjusting the adjusting screw means, it is possible to easily adjust the contact height position of the pair of seals. In the invention according to claim 5, the length of the first connecting rod and the length of the second connecting rod can be made the same in a short dimension, and the operating force transmitted from the opening / closing cam to the pair of seals is the same. A reliable and good seal can be performed.

In the invention according to claim 6, the article delivery conveyor disposed upstream and downstream of the position where the seal body is disposed,
Since it is configured to move close to and away from the opening and closing operation of the pair of seals, it is possible to reliably deliver the packaged object passing through the position where the horizontal seal device is provided. In the invention according to claim 7, by adopting a servomotor capable of speed change control as the drive motor, when changing the product type or changing the packaging speed, it is only necessary to change the set value of the corresponding control data. Can respond.

[Brief description of the drawings]

FIG. 1 is a front view showing a horizontal sealing device according to a preferred embodiment of the present invention in a partially broken state.

FIG. 2 is a plan view showing the horizontal sealing device according to the embodiment in a partially broken state.

FIG. 3 is a side view showing the horizontal sealing device according to the embodiment in a partially broken state.

FIG. 4 is a main part plan view showing the horizontal sealing device according to the embodiment in a partially broken state.

FIG. 5 is a fragmentary front view of the height adjusting means according to the embodiment, partially cut away;

FIG. 6 is a partial rear view showing a horizontal moving unit, a height adjusting unit, and the like according to the embodiment, partially cut away;

[Explanation of symbols]

 13 First Transfer Conveyor (Article Delivery Conveyor) 14 Second Transfer Conveyor (Article Delivery Conveyor) 15 First Sealed Body (One Sealed Body) 16 Second Sealed Body (The Other Sealed Body) 30 Packaged Article 31 Cylindrical Film 32 first connecting rod (opening / closing means) 33 second connecting rod (opening / closing means) 35 holding member 36 support frame 37 holding connecting rod 39 first supporting member 41 spring (elastic member) 44 second supporting member 45 horizontal moving means 46 toggle Mechanism 48 Drive shaft 50 Servo motor (drive motor) 54 Cam lever 55 Opening / closing cam 57 Link member 58 First connecting rod 59 Second connecting rod 60 Link rod 61 Rotating plate (crank member) 62 Swing lever 65 Adjusting screw (adjustment) Screw means) 66 Female screw hole (adjustment screw means) 68 Height adjustment means 73 Right slide rail 77 Left slide rail

Claims (7)

[Claims] 1. A tubular film filled with an article to be packaged (30).
(31), a pair of seal bodies (15, 15) that are arranged vertically opposite to each other across the transfer path, move in the transfer direction along with the transfer of the tubular film (31), and move close to and away from each other. 16)
Thus, in the horizontal sealing device of the horizontal bag making and filling machine for sealing before and after sandwiching the packaged object (30) of the cylindrical film (31), the pair of seals (15, 16) are slidably arranged. A support frame (36) provided, and a drive shaft (48) pivotally supported on the support frame (36).
An opening / closing cam (55) arranged so as to be integrally rotatable with the opening / closing cam (55), and the pair of sealing bodies (1
A toggle mechanism (46) for opening and closing the (5, 16), a drive motor (50) disposed on the support frame (36), for rotating the drive shaft (48), and the support frame (36). Is provided with a slide rail (73, 77) for horizontally moving the tubular film (31) in the front-rear direction in the transfer direction, and is operated by the drive motor (50) to move the support frame (36) to the slide rail ( Horizontal sealing means for a horizontal bag making and filling machine, characterized by comprising horizontal moving means (45) for horizontally moving along (73, 77). The slide rails (73, 77) are mounted on a machine frame (12).
The slide rails (73, 77) are vertically slidable with respect to
2. A horizontal sealing device for a horizontal bag-making and filling machine according to claim 1, wherein said (15, 16) is provided with height adjusting means (68) for adjusting a height position where said (15, 16) abuts on said cylindrical film (31). 3. A crank member (61) rotatably disposed on the support frame (36), the horizontal moving means (45) comprising:
A swing lever (62) having one end pivotally supported at the eccentric position of the crank member (61) and the other end pivotally supported by the machine frame (12), and the slide rail ( 3. The horizontal sealing device for a horizontal bag making and filling machine according to claim 1, wherein the horizontal sealing device comprises: 73, 77). 4. An end of the height adjusting means (68) is a frame.
A holding member (35, 35) pivotally supported by (12) and provided with adjusting screw means (65, 66) at a position separated from the pivot end.
4. The horizontal bag-making and filling device according to claim 2, comprising a holding connecting rod (37, 37) connected to each of the holding member (35, 35) and the slide rail (73, 77). Machine horizontal sealing device. 5. A first support member (39) is connected to one end of a link member (57) pivotally supported by the support frame (36) via a first connection rod (58). At the other end of the link member (57), a second support member (44) that can move relatively close to and away from the first support member (39) is provided on the second connecting rod (5).
9), the one seal body (15) is disposed so as to be able to move up and down with the movement of the first support member (39) in a state in which the seal surface faces the transfer path. , The other seal body (16),
The support frame (36) is disposed so as to be able to move up and down with the movement of the second support member (44) in a state where the seal surface facing the seal surface of the one seal body (15) faces the transfer path, The drive shaft (4
The cam lever (5) with one end engaged with the opening / closing cam (55) of (8)
4) is rotatably supported by the support frame (36), and the other end of the cam lever (54) is displaced from the pivot of the link member (57). ), And when the pair of seals (15, 16) are in contact, one seal (15) is displaced with respect to the other seal (16), so that a substantially constant clamping pressure is always obtained. The corresponding support members (3
The horizontal bag making and filling machine according to any one of claims 1 to 4, wherein the seal body (15, 16) is configured to be urged by an elastic member (41, 41) against the seal body (9, 44). Sealing device. 6. An article delivery conveyor (13, 14) is provided on each of the upstream and downstream sides of an arrangement position of the seal body (15, 16),
With the opening and closing operation of the pair of seals (15, 16), the seals (1
The horizontal sealing device of a horizontal bag-making and filling machine according to any one of claims 1 to 5, further comprising an opening / closing means (32, 33) in which the tip of the conveyor directed to (5, 16) moves relatively close to and away from the conveyor. 7. The driving motor (50) is a servomotor, and is set so as to be able to control a shift according to a change in a film cut pitch or a packaging speed corresponding to the size of the packaged object (30). Item 7. A horizontal sealing device for a horizontal bag making and filling machine according to any one of Items 1 to 6.