JP2013086836A - Sealing device for bag-making filling machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve workability of component assembly or exchange.SOLUTION: A sealing device includes: a motor; a drive unit in which a first rotor and a second rotor are disposed, the first rotor and the second rotor being rotated oppositely to each other by receiving a driving force of the motor; an operating mechanism supported by the drive unit for opening/closing a pair of seal bodies by rotating both the rotors; a machine frame 34 having an opening 44 to and from which the drive unit supporting the operating mechanism is inserted and removed; and a guide 76 disposed in the frame 34 and guiding the drive unit when inserted into and removed from the machine frame 34 via the opening 44.

Description

  The present invention relates to a sealing device in a bag making and filling machine.

  There is known a sealing device in a bag making and filling machine that opens and closes a pair of sealing bodies disposed opposite to each other across a conveyance path of a tubular film and seals the tubular film in the width direction at predetermined intervals. ing. In this type of sealing device, as disclosed in, for example, Patent Document 1, a driving force from a motor disposed outside the machine frame in the sealing device is received by a plurality of gears disposed inside the machine frame. The pair of seal bodies are configured to open and close.

Japanese Patent No. 2969258

  The above-mentioned sealing device must be fitted with a tool such as a wrench inside the machine frame to tighten or loosen the screws when assembling or replacing parts such as gears to the machine frame. Workability is poor because it must be done.

  That is, the present invention has been proposed in order to suitably solve these problems inherent in the sealing device in the bag making and filling machine according to the prior art, and is easy to assemble and replace parts. It aims at providing the sealing device in a filling machine.

In order to overcome the above-mentioned problems and achieve the intended purpose, a sealing device in a bag making and filling machine according to claim 1 of the present application is
A sealing device in a bag making and filling machine that seals at predetermined intervals in a direction intersecting the film transport direction of a tubular film by a pair of seal bodies disposed opposite to each other across the conveyance path of the tubular film. And
A drive unit in which a motor and a first rotating body and a second rotating body that rotate in opposite directions by receiving the driving force of the motor are disposed;
An operation supported by the drive unit so that one seal body linked to the first rotary body and the other seal body linked to the second rotary body are opened and closed by the rotation of both rotary bodies. Mechanism,
A machine frame having an opening through which the drive unit in a state of supporting the operating mechanism can be inserted and removed;
A guide disposed on the machine frame and guiding the drive unit when being inserted into and removed from the machine frame through the opening;
The drive unit is disposed in the machine frame in a state of being in contact with the guide so that movement in a direction different from the direction guided by the guide is restricted.
According to the first aspect of the present invention, since the drive unit can be attached to and detached from the machine frame, it is easy to assemble and replace components such as a motor, a rotating body, an operating mechanism, and a seal body. Further, since the drive unit is guided by the guide when being inserted into and removed from the machine frame, it is easy to perform the insertion / removal operation and the positioning operation. The drive unit is restricted in movement by contact with the guide, and can be arranged in the machine frame without rattling.

In the invention according to claim 2, the driving unit is configured such that the first rotating body and the second rotating body respectively supported by a support shaft are individually rotated by receiving the driving force of the same motor,
The operating mechanism is connected to a pair of connecting portions disposed so as to sandwich the corresponding rotating body at both ends of each support shaft.
According to the invention which concerns on Claim 2, the timing of the opening / closing operation | movement of both the sealing bodies linked to each of the rotary body via the operating mechanism by rotating the 1st rotary body and the 2nd rotary body with the same motor. Can be synchronized. Moreover, the apparatus can be simplified by disposing the rotating body between the pair of connecting portions.

According to a third aspect of the present invention, there is provided an adjustment mechanism capable of moving and adjusting a support position of the drive unit with respect to the machine frame in an opposing direction of the pair of seal bodies, and the adjustment mechanism includes the guide. .
According to the invention of claim 3, the number of parts can be reduced by using the guide as a part of the adjusting mechanism.

  According to the sealing device in the bag making and filling machine according to the present invention, it is easy to assemble and replace parts, and the workability of these operations can be improved.

It is explanatory drawing which shows schematic structure of the horizontal bag-making filling machine which concerns on the suitable Example of this invention. It is a schematic perspective view which shows the horizontal sealing apparatus of an Example. It is the schematic which shows the machine frame of an Example. It is a schematic perspective view which shows the drive unit of an Example, an action mechanism, and a seal body. It is a schematic perspective view which shows the adjustment mechanism of an Example. It is a schematic plan view which shows the machine frame and adjustment mechanism of an Example.

  Next, the sealing device in the bag making and filling machine according to the present invention will be described below with reference to the accompanying drawings by giving a preferred embodiment.

  As shown in FIG. 1, the bag making and filling machine according to the embodiment is a horizontal bag making and filling machine, in which a film feeding mechanism 10 draws and guides a belt-like film F from a raw fabric roll 12 to a bag making means 14 to make a product. The tubular film F is formed by the bag means 14. The vertical sealing means 18 applies vertical sealing to the overlapping edge portion along the film transfer direction of the tubular film F transferred to the vertical sealing means 18 by the pair of feed rollers 16. Also, the article supply conveyor 20 supplies the articles B into the cylindrical film F at predetermined intervals, and the cylindrical film F supplied with the articles B is laterally sealed (sealing apparatus) 24 by a conveyor (not shown). To be transferred to.

  As shown in FIG. 2, the horizontal sealing device 24 includes a pair of sealing bodies 26 and 28 that are disposed facing each other vertically across the transfer path of the tubular film F and are heated to a required temperature. The upper first seal body (one seal body) 26 is disposed with the seal surface 26a facing the first support member 30 so as to face the transfer path of the tubular film F, and the lower second seal body ( The other seal body 28) is disposed with the seal surface 28 a facing the second support member 32 so as to face the transfer path of the tubular film F. The pair of seal bodies 26, 28 are opened and closed by operating mechanisms 72, 74 supported by a drive unit 36 disposed in a machine frame 34 disposed below a transport conveyor (not shown). A structure in which a horizontal seal is applied at predetermined intervals in the width direction of the cylindrical film F (direction intersecting the film transfer direction) by heating and pressurizing the cylindrical film F between both the sealing bodies 26 and 28 when close to each other. Is done. The cylindrical film F is cut by a cutter (not shown) disposed on the first seal body 26 side together with the horizontal seal.

  As shown in FIGS. 3 and 5, the machine frame 34 includes a base body 38 extending to the bottom side and a pair of support bodies 40 erected in a required direction (film transfer direction in the embodiment). , 40 and a pair of wall bodies 42, 42 erected in a direction orthogonal to the opposing direction of both supports 40, 40, and the drive unit 36 is inserted in the upper part. A removable unit opening (opening) 44 is provided. The unit opening 44 can be opened by removing a conveyor (not shown) disposed above the machine frame 34.

  The drive unit 36 is detachably disposed inside the machine casing 34. As shown in FIG. 4, the drive unit 36 includes a pair of installation plate portions 46, 46 erected in the width direction, and an intermediate plate portion 48 erected between the installation plate portions 46, 46. The installation plate portions 46 and 46 and the intermediate plate portion 48 are connected to each other by a connection bar 50. The drive unit 36 includes a motor 52 disposed on the intermediate plate 48, a drive gear 54 disposed on the output shaft of the motor 52, a first driven gear 56 meshed with the drive gear 54, and the first And a second driven gear 58 meshed with the first driven gear 56. The first driven gear 56 and the second driven gear 58 are rotatably supported between the intermediate plate portion 48 and the one installation plate portion 46. The drive unit 36 is disposed on a first support shaft 60 that is rotatably supported by both installation plate portions 46, 46 and is engaged with a first driven gear 56 (first operating gear 56 (first rotating body)). 62 and a second operating gear (second rotating body) 66 that is disposed on a second support shaft 64 that is rotatably supported by both installation plate portions 46 and 46 and meshes with the second driven gear. Yes. Here, the first operating gear 62 and the second operating gear 66 are configured to rotate in opposite directions upon receiving the driving force of the motor 52. A first cam plate (connecting portion) 68 that rotates as the first support shaft 60 rotates is disposed on both ends of the first support shaft 60 that extend outside the installation plate portions 46 and 46. The first seal body 26 is linked to the first cam plate 68 via the operation mechanisms 72 and 74. On both ends of the second support shaft 64 that extend outside the installation plate portions 46, 46, second cam plates (connecting portions) 70 that rotate as the second support shaft 64 rotates are disposed. The second seal body 28 is linked to the second cam plate 70 through operating mechanisms 72 and 74. The motor 52 is preferably one that can control the position, speed, and the like by control means (not shown). For example, a servo motor is used.

  As shown in FIG. 4, the operating mechanisms 72 and 74 are connected to positioning holes 68 a provided at the eccentric positions of the corresponding first cam plate 68 at the lower ends of the operating mechanisms 72 and 74, with the drive unit 36 interposed therebetween. A pair of shafts 72, 72 spaced apart in the width direction and their lower portions are connected to positioning holes (not shown) provided at the eccentric positions of the corresponding second cam plate 70, thereby driving unit 36. And a pair of sleeves 74 and 74 that are spaced apart in the width direction. Each shaft 72 passes through the inside of a sleeve 74 on the same side and extends above the sleeve 74, and the shaft 72 and the sleeve 74 are slidable in the vertical direction. A first support member 30 provided with the first seal body 26 is installed between the upper ends of the pair of shafts 72, 72, and the second seal body 28 is disposed between the upper ends of the pair of sleeves 74, 74. A second support member 32 in which is disposed is constructed. Note that a cutter (not shown) is disposed near the center of the first support member 30. Then, the first cam plates 68 and 68 and the second cam plates 70 and 70 rotate in accordance with the rotation of the first operating gear 62 and the second operating gear 66 that receive the driving force of the motor 52, whereby the operating mechanism 72, A pair of seal bodies 26 and 28 are opened and closed up and down so as to be close to and away from each other via 74 and perform a so-called box motion in which they are moved back and forth in the film transport direction. In the cam plates 68 and 70, a plurality of positioning holes 68a having different distances from the rotation center are set on a straight line passing through the rotation center. An appropriate positioning hole 68a in the first cam plate 68 is selected, and a pin (not shown) disposed in the engaging portion 72a of the shaft 72 is connected to the positioning hole 68a and the engaging portion 72a is connected. By connecting a pin (not shown) disposed in the sleeve 74 to the positioning hole of the second cam plate 70 that is in a symmetrical relationship with the hole 68a across the horizontal direction, the rotational radius of the pair of seal bodies 26 and 28 is increased. The operating range of both seal bodies 26, 28 can be changed to be the same.

  As shown in FIG. 2 or FIG. 6, a guide 76 that guides a drive unit 36 that is inserted into and removed from the machine frame 34 through a unit opening 44 on the wall surface of the machine frame 34 facing the film transfer direction. Is arranged. A pair of guides 76 and 76 for guiding the installation plate portion 46 on the front side of the drive unit 36 are disposed on the inner surface of the support 40 (referred to as the first support) on the upstream side in the film transfer direction so as to be spaced apart from each other. In addition, a guide 76 for guiding the installation plate portion 46 on the back side is disposed. A pair of guides 76 and 76 for guiding the front and back installation plate portions 46 correspondingly in the width direction are provided on the inner surface of the support 40 (referred to as the second support) on the downstream side in the film transfer direction. They are spaced apart. Further, the installation body 43 that is installed between the pair of wall bodies 42 and 42 and extends to the inner lower portion of the machine frame 34 has installation plates on the front side and the back side on the surface facing the first support body 40. A pair of guides 76, 76 for correspondingly guiding each of the portions 46 are disposed apart from each other in the width direction. The rear guide 76 has a larger extension dimension from the wall surface than the front guide 76. The drive unit 36 is sandwiched by guides 76 in which both the installation plate portions 46 are separated from the outside in the width direction, so that the drive unit 36 moves in the width direction (a direction different from the direction in which the drive unit 36 is guided by the guide 76). It is arranged in the machine casing 34 in contact with the guide 76 so as to be regulated.

  A positioning piece 78 that can be attached to and detached from the installation plate portion 46 by inserting / removing a pin extends from the end edge to the downstream side in the film transfer direction on the upper edge of the installation plate portion 46 on the downstream side in the film transfer direction. It is attached so that it may come out. The drive unit 36 causes the upstream edge of the installation plate 46 in the film transport direction to abut against the first support 40 and the positioning piece 78 to abut against the second support 40 to move in the film transport direction. Is installed in a regulated state. Further, the drive unit 36 is restricted from moving in the film transfer direction by sandwiching the lower portion of the installation plate portion 46 between the first support body 40 and the erection body 43. The upper edge of the second support 40 is formed such that a flange 40a is bent inward, and the opening width of the unit opening 44 defined between the flange 40a and the first support 40 is as follows. Although it is smaller than the separation width of the pair of supports 40, 40, the insertion and removal through the unit opening 44 of the drive unit 36 is permitted by removing the positioning piece 78.

  The drive unit 36 disposed in the machine frame 34 is configured to be movable and adjustable in the vertical direction (opposite direction of the pair of seal bodies 26 and 28) with respect to the machine frame 34 by an adjustment mechanism 80. Yes. A worm wheel 82 is disposed on the base body 38 extending to the bottom of the machine frame 34 so as to be rotatable about an axis in the vertical direction, and an adjusting bolt is extended so as to extend in the vertical direction on an internal screw of the worm wheel 82. 84 is screwed. A worm 88 that meshes with the worm wheel 82 is disposed on a handle shaft 86 that is disposed so as to be rotatable with respect to the machine frame 34, and is provided at an end portion of the handle shaft 86 that extends to the front outer side of the machine frame 34. When the handle shaft 86 is rotated by the handle 90, the adjustment bolt 84 is slid up and down under the screwing action of the worm 88, the worm wheel 82, and the adjustment bolt 84 that form an adjustment mechanism. Here, the drive unit 36 is positioned in the horizontal direction by inserting an adjusting bolt 84 into a positioning hole 50 a formed in the connecting bar 50 extending under the drive unit 36. The drive unit 36 is moved in the vertical direction while being guided by the guide 76 as the adjustment bolt 84 is moved up and down by the operation of the handle 90.

(Effects of Example)
Next, the operation of the lateral seal device 24 according to the embodiment will be described. When attaching the machine unit 34 to the drive unit 36, first, the adjustment bolt 84 of the adjusting mechanism 80 is lowered to be in the retracted state. The drive unit 36 is inserted into the machine frame 34 through the unit opening 44 and lowered in a state where the drive unit 36 is aligned between the guides 76 and 76 spaced apart in the width direction, so that a pair of side surfaces of the drive unit 36 is formed. The installation plate portions 46 and 46 are guided in contact with the corresponding guides 76. Since the drive unit 36 is guided by the guide 76, the drive unit 36 can be placed on the adjustment mechanism 80 in a state where the positioning hole 50 a is accurately aligned with the adjustment bolt 84. The handle 90 is rotated to raise the adjustment bolt 84, and the adjustment bolt 84 is fitted into the positioning hole 50a. Then, by attaching the positioning pieces 78 to the both installation plate portions 46, the movement in the film transport direction in the drive unit 36 is restricted by being sandwiched between the pair of supports 40, 40, and the guides are separated in the width direction. The movement of the drive unit 36 in the width direction is restricted by being sandwiched by 76. When removing the drive unit 36 from the machine frame 34, the drive unit 36 can be easily pulled out from the unit opening 44 by pulling up the drive unit 36 according to the guide 76 after removing the positioning piece 78.

  According to the lateral seal device 24 of the embodiment, the drive unit 36 can be handled in units including parts such as the motor 52 and the gears 54, 56, 58, 62, 66, and the seal bodies 26, 28 and the The drive unit 36 can be inserted and removed from the unit opening 44 in a state including the operation mechanisms 72 and 74 that support the seal bodies 26 and 28. Thus, since the drive unit 36 can be attached to and detached from the machine frame 34, the motor 52 of the drive unit 36, the gears 54, 56, 58, 62, 66 and the like, the operation mechanisms 72, 74, the seal body 26, It is easy to assemble and replace components such as 28, and the workability of these operations can be improved. Further, since the drive unit 36 is guided by the guide 76 when being inserted into and removed from the machine frame 34, it is easy to perform insertion and removal operations and positioning operations. Since the drive unit 36 is restricted from moving in the width direction and the film transport direction by the contact with the guide 76 and the contact with the pair of supports 40, 40, the drive unit 36 is disposed in the machine frame 34 without rattling. can do. By rotating the first operating gear 62 and the second operating gear 66 by the same motor 52, the opening and closing operations of both seal bodies 26, 28 linked to the operating gears 62, 66 via the operating mechanisms 72, 74 are performed. Timing can be synchronized. Further, by disposing the operation gears 62 and 66 between the pair of cam plates 68, 68, 70 and 70, the apparatus can be simplified. By using the guide 76 as a part of the adjusting mechanism 80, the number of parts can be reduced.

(Change example)
The present invention is not limited to the configuration of the embodiment, and can be modified as follows, for example. It should be noted that the present invention is not limited to the following modification examples, and various embodiments may be adopted for the configurations described in the examples within the scope of the gist of the present invention.
(1) The bag making and filling machine is not limited to a horizontal bag making and filling machine, and can be applied to a vertical bag making and filling machine.
(2) The unit opening 44, the guide 76, and the like may be configured so that the drive unit 36 is guided into the machine frame 34 from a direction that intersects the direction in which the pair of seal bodies 26, 28 open and close.
(3) The operation mechanism can adopt a configuration that can open and close the seal bodies 26 and 28 by a link, a gear, or a combination thereof.
(4) The mechanism for transmitting the driving force of the motor to the rotating bodies 62 and 66 in the drive unit is not limited to gears, and a belt, a link, or other transmission means can be employed.
(5) A base is provided in place of the machine frame 34 having the support 40, and guides such as pins are projected upward from a plurality of locations on the base, and the drive unit 36 is supported by these guides. It may be configured such that it is supported and positioned while being guided.
(6) The guide 76 may be configured to leave the drive unit 36 after guiding the drive unit 36 halfway in the machine casing 34. In this case, a member other than the guide 76 is disposed on the machine frame 34, and the drive unit 36 is fixed to the machine frame 34 with the drive unit 36 in contact with the other member. Also good.

26 first seal body (seal body), 28 second seal body (seal body), 34 machine frame,
36 drive unit, 44 unit opening (opening), 52 motor,
60 first support shaft (support shaft), 62 first operating gear (first rotating body),
64 second support shaft (support shaft), 66 second operation gear (second rotating body),
68 1st cam plate (connection part), 72 shaft (operation mechanism), 74 sleeve (operation mechanism),
76 Guide, 70 Second cam plate (connection part), 80 Adjustment mechanism, F Tubular film

Claims (3)

Sealed at predetermined intervals in a direction intersecting the film transfer direction of the tubular film (F) by a pair of sealing bodies (26, 28) arranged opposite to each other across the conveyance path of the tubular film (F). A sealing device for a bag making and filling machine,
A drive unit (36) in which a motor (52) and a first rotating body (62) and a second rotating body (66) rotating in opposite directions by receiving the driving force of the motor (52) are disposed; ,
One seal body (26) linked to the first rotary body (62) and the other seal body (28) linked to the second rotary body (66) are both rotary bodies (62, 66). An actuation mechanism (72, 74) supported by the drive unit (36) so as to be opened and closed by rotation of
A machine frame (34) having an opening (44) into which the drive unit (36) in a state of supporting the operating mechanism (72, 74) can be inserted and removed;
A guide (76) disposed on the machine frame (34) and guiding the drive unit (36) when being inserted into and removed from the machine frame (34) through the opening (44),
The drive unit (36) is disposed in the machine frame (34) in contact with the guide (76) so that movement in a direction different from the direction guided by the guide (76) is restricted. A sealing device in a bag making and filling machine. The drive unit (36) is configured so that the first rotating body (62) and the second rotating body (66) supported by the support shafts (60, 64) respectively generate the driving force of the same motor (52). Received and rotated
The operating mechanism (72, 74) is connected to a pair of connecting portions (68, 70) disposed so as to sandwich the corresponding rotating body (62, 66) at both ends of each support shaft (60, 64). The sealing device in the bag making and filling machine according to claim 1.   An adjustment mechanism (80) capable of moving and adjusting the support position of the drive unit (36) relative to the machine frame (34) in the opposing direction of the pair of seal bodies (26, 28), the adjustment mechanism (80) 3. The sealing device for a bag making and filling machine according to claim 1, further comprising the guide (76).

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