JP2009001322A - Device for holding opening of packaging bag in packaging machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device for holding the opening of a packaging bag, which is arranged outside a rotation area of the rotor with a pair of grips to enable an effective use of an open space above a rotor. <P>SOLUTION: An arcuate guide rail 19 centering on a rotor 4 with a pair of the grips g is horizontally attached to the upper end of an ascending and descending shaft 16. A slider 20 mounted to the guide rail is provided to be reciprocated by drive means. A synchronizing claw means 21 having a pair of synchronizing claws 26 is provided at the slider, the pair of the synchronizing claws 26 is controlled to close in a V-shaped state and open in an approximately parallel expanded state. The synchronizing claws closed in a V-shape are inserted into a bag opening by descending the ascending and descending shaft in a step preceding to a filling step. The slider is moved to the filling step synchronizing with the rotation of the rotor while the bag opening being strained by expanding the synchronizing claws. As soon as a filling funnel is inserted into the bag opening in the filling step, the synchronizing claws are removed from the bag opening by ascending the ascending and descending shaft. Then the slider is moved to the initial position in the preceding step. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an opening holding device for a packaging bag used for reliably inserting a filling funnel into a bag mouth in a rotary packaging machine.

  In a general rotary packaging machine, the packaging bag supplied in the bag feeding process is supported in a suspended form by each grip pair with the bag mouth facing up, and by a suction cup corresponding to both sides of the packaging bag in the opening process The bag opening is opened by adsorbing, and the opened bag opening is maintained so as not to be closed before the filling funnel is inserted.

  Patent Document 1 discloses a bag mouth opening claw device for a packaging bag according to the present applicant. This bag mouth opening claw device lowers a lifting shaft provided so as to move up and down at the center of an intermittent rotation shaft to which a rotating body provided with a grip pair in a radial direction is fixed simultaneously with opening of the bag mouth by a suction cup. Insert the open claw closed in a V-shape into the bag mouth, then expand the open claw into an eight-shape and rotate the bag mouth to the filling process, filling in the filling process Almost at the same time when the funnel is inserted into the bag mouth, the opening claw is closed in a V shape to raise the lifting shaft, and then the opening claw portion is automatically returned to the original opening process position.

  Since the bag mouth opening claw device reciprocates in a circular arc between predetermined steps around the lifting shaft in the intermittent rotation shaft, a device attached to the packaging machine may be provided above the rotating body in the moving range. Can not.

For example, in the rotary type packaging machine shown in Patent Document 2, a filling funnel corresponding to each of a large number of grip pairs is provided, and thus the bag mouth opening claw device having the above structure cannot be provided.
Japanese Utility Model Publication No. 53-24853 Japanese Patent No. 2884061

  An object of the present invention is to maintain the opening of a packaging bag in a packaging machine capable of effectively utilizing the open space above the rotating body by disposing the device outside the rotating area of the rotating body provided with the grip pair. To provide an apparatus.

In order to achieve the above object, the invention described in claim 1 is a packaging supplied in a bag feeding process by moving a rotating body provided with a number of grip pairs in a radial direction while intermittently stopping the rotating body in a plurality of processes. Support the bag in a suspended manner with each grip pair facing the bag mouth, fill the packaging bag with the bag mouth open in the filling process, and seal the bag mouth in the subsequent process In the packaging machine made
An arc-shaped guide rail centered on the rotating body is horizontally attached to the upper end portion of the lifting shaft arranged outside the rotating area of the rotating body, and a slider mounted on the guide rail is reciprocally provided by driving means. The slider is provided with a tuning claw means having a pair of tuning claws controlled to open and close in a state of being expanded in parallel with the V-shaped closed state, and the lifting shaft is lowered in the previous process of the filling process. The tuning claw closed in a V-shape is inserted into the bag mouth, and the slider is synchronized with the rotation of the rotating body by operating the driving means in a state where the tuning claw is expanded and the bag mouth is tensioned. At the same time when the filling funnel is inserted into the bag mouth in the filling step, the lifting shaft is raised to let the tuning claw escape from the bag mouth, and then the operation of the drive means The previous construction of the slider Characterized by providing to move to the position.

  In order to achieve the same object, according to a second aspect of the present invention, there is provided an opening holding device for a packaging bag in a packaging machine according to the first aspect, wherein the tuning claw means includes two each of the tuning claws. One lever, a control lever having a first roller and a second roller, and a middle lever coupled with a lever of one tuning claw and a transmission rod are fixed to the slider. And a part of the lever of the other tuning claw is provided so as to be able to contact the second roller, and a tension spring is stretched between the lever and the intermediate lever or the transmission rod. A plate cam that swings the control lever by bringing the first roller into contact with the inner surface when mounted on the front process side is attached to the guide rail, and the control lever is pushed down by the plate cam in the previous process. Thus, the tuning claw is closed in a V-shape, and the control lever swings upward as the slider moves away from the previous step, so that the tuning claw is expanded. .

(Invention of Claim 1)
The packaging bag opening holding device in this packaging machine is configured such that the device is arranged outside the rotation region of the rotating body of the packaging machine provided with the grip pairs, and each grip pair in the open space above the rotating body. The space can be used effectively, for example, it is possible to install a filling funnel and a filling nozzle that are arranged and rotated together.

(Invention of Claim 2)
The opening holding device for the packaging bag in this packaging machine is such that the tuning lever is closed in a V shape by depressing the control lever by the plate cam, and the control lever swings upward as it moves away from the standby position. It has a tuning claw means for expanding the claw, and can be installed in a small space with a compact configuration.

  The best mode of the present invention will be described below with reference to the drawings. 1 is a plan view of a gas-filled packaging machine to which the present invention is applied, FIG. 2 is a side view thereof, FIG. 3 is a plan view of an opening holding device for a packaging bag, and FIG. 4 is a cross-sectional view taken along line AA in FIG. 5 is a plan view of the tuning claw means and its surroundings, FIG. 6 is a view as seen from the direction of arrow B in FIG. 5, FIG. 7 is a front view of a guide rail to which a plate cam is attached, FIG. It is explanatory drawing of the square locus | trajectory motion of a synchronization nail | claw.

  1 and 2 show a rotary type gas-filled packaging machine P to which the “packaging bag opening holding device H in a packaging machine” of the present invention is applied. This packaging machine P includes a bag feeding process (1), a printing process (2) such as an expiration date, a packaging bag opening process (3), a filling process (4) of an article to be packaged such as a shaving knot, and a pushing process (5). , Nozzle insertion and bag mouth temporary sealing step (6), gas replacement / brushing step (7) to (13), top sealing step (14), sealing portion cooling step (15), product removal step (16) It consists of 16 steps.

  On the machine base 1 of the packaging machine P, there is provided a stand 3 that freely supports a vertical intermittent rotating shaft 2, and a disc-shaped rotating body 4 attached to the intermittent rotating shaft 2 has a packaging bag a 16 grip pairs g (the same number as the number of steps) are provided so as to protrude in the radial direction at equal angular intervals. The bag feeding apparatus 10 arranged in the bag feeding step (1) separates a large number of packaging bags a stacked on the supply table 11 one by one from above by suction means having a suction cup (not shown). It is a known structure that is supplied to the grip pair g in a state of being suspended with the bag mouth facing upward.

  As shown in FIG. 3, the opening holding device H for the packaging bag is disposed outside the rotation area of the rotating body 4. The column 15 erected on the machine base 1 is provided with a lift shaft 16 whose operation is controlled by a cam and a lever mechanism (not shown) linked to the drive control device of the packaging machine (FIG. 4). The block 17 fixed to the upper end of the elevating shaft 16 is provided with a support member 18 to which an arcuate guide rail 19 centering on the rotating body 4 is attached horizontally.

  A block-shaped slider 20 is slidably mounted on the guide rail 19. The slider 20 is provided with a tuning claw means 21 having a pair of tuning claws 26 that are controlled to be opened and closed so as to expand in a substantially V-shaped closed state.

  5 and 6, a support wall 23 extending on the rear wall surface 22a of the "¬" -shaped base 22 of the synchronizing claw means 21 so as to cross over the packaging bag a that is supported by the grip pair g and rotates. Is fixed. The support bar 23 is provided with two levers 24 and 25 each provided with one of a pair of tuning claws 26 so as to be swingable in a direction perpendicular to the center rotation orbit k of the packaging bag a. A control lever 28 and an intermediate lever 33 are swingably provided on a horizontal shaft 27 provided on the fixed side of the support rod 23. One lever piece 28a of the control lever 28 is attached with a first roller 29 that rotates in a direction substantially following the moving direction of the slider 20, and two second rollers 30 and 31 are coaxially attached to the other lever piece 28b. It is attached to. The intermediate lever 33 enables the tip of one transverse piece 33 a to contact the second roller 30, and the other lever piece 33 b and one lever 24 are connected by a transmission rod 35. Further, the traversing piece 25 a which is a part of the other lever 25 can be brought into contact with the second roller 31. A tension spring 36 is stretched between the other lever piece 25b of the lever 25 and the transmission rod 35 (or the lever piece 33b of the intermediate lever 33).

  Reference numeral 41 denotes a plate cam attached to a bracket 40 fixed to the guide rail 19 (FIG. 7). When the slider 20 is positioned in the packaging bag opening process (3), which is the previous process side of the filling / first pushing process (4), the plate cam 41 is provided with the first roller 29 of the control lever 28. Is brought into contact with the inner surface 41a and the control lever 28 is pushed down to close the tuning claws 26, 26 into a V-shaped state, while the slider 20 is filled from the opening step (3) of the packaging bag to the filling step of the package. The control lever 28 is provided so as to swing upward to widen the tuning claws 26 and 26 as they move away from each other toward (4). Reference numeral 42 denotes a regulating piece for restricting the upward movement of the control lever 28 in order to maintain the normal expansion state of the tuning claws 26 and 26. The restriction piece 42 is attached to the upper surface 22 b of the base 22.

  Reference numeral 45 denotes a driving means for allowing the slider 20 mounted on the guide rail 19 to reciprocate between the opening process (3) of the packaging bag and the filling process (4) of the package. As shown in FIG. 8, a bifurcated lever 48 is provided on the bracket 46 of the driving means 45 attached to the machine base 1 so as to be swingable by a horizontal shaft 47. One lever piece 48a of the lever 48 is connected to a cam linked to a drive control device of the packaging machine and a drive rod 49 whose operation is controlled by a lever mechanism (not shown). The other lever piece 48 b and the base 22 are connected by a rod 50.

  Accordingly, the slider 20 is moved forward from the packaging bag opening step (3) to the package filling step (4) by the lowering of the drive rod 49, and the slider 20 is moved by the raising of the drive rod 49. The driving means 45 is configured to move backward from (4) to the packaging bag opening step (3).

  As described above, when the packaging bag a is intermittently stopped in the packaging bag opening step (3), the elevating shaft 16 is lowered and the synchronization claws 26 and 26 closed in a V shape are inserted into the bag mouth b, and driving means When the slider 20 is moved in synchronization with the rotational operation of the rotating body 4 by the operation of 45, the synchronization claws 26 and 26 are opened to make the bag mouth tense, and the bag mouth is tense. It is moved to the filling step (4) in the state, and at the same time when the filling funnel 61 of the filling device 60 is inserted into the bag mouth b in the filling step (4), the lifting / lowering shaft 16 is raised to bring the synchronizing claw 26, 26 is made to escape from the bag mouth b, and then the slider 20 is moved to the position of the original opening step (3) by the operation of the driving means 45, and when the slider 20 returns to this position, the synchronized claws 26, 26 in the open state are opened. Is closed again in a V shape to prepare for the next packaging bag Opening holding device H of the packaging bag in the bright packaging machine is constructed.

  About the said synchronization nail | claw 26, the square locus | trajectory motion shown in FIG. 9 is performed between the opening process (3) of a packaging bag, and a filling process (4).

  About the effect | action of the opening maintenance apparatus H of the packaging bag in the packaging machine of this invention, since it will be understood by the content of description in each component, description is abbreviate | omitted.

  As described above, this packaging bag opening holding device is configured such that the device is arranged outside the rotating region of the rotating body of the packaging machine provided with the grip pair, and the grip is held in the open space above the rotating body. The space can be used effectively, for example, it is possible to install a filling funnel and a filling nozzle that are arranged in pairs and rotate together.

The top view of the gas filling packaging machine to which this invention is applied Same side view Top view of the packaging bag opening holding device AA line sectional view of FIG. Top view of tuning claw means and its surroundings B arrow view of FIG. Front view of guide rail with plate cam Explanatory drawing of drive means Explanatory drawing of quadrangular locus motion of synchronized claws

Explanation of symbols

P ... Gas-filling packaging machine 4 ... Rotating body g ... Grip pair a ... Packaging bag b ... Bag mouth H ... Packaging bag opening holding device 16 ... Elevating shaft 19 ..Guide rail 20 ... slider 21 ... synchronizing claw means 23 ... support rods 26, 26 ... synchronizing claw 28 ... control lever 29 ... first rollers 30, 31 ... first 2 rollers 33 ... intermediate lever 35 ... transmission rod 41 ... plate cam 45 ... driving means

Claims (2)

A rotating body provided with a large number of grip pairs in the radial direction is stopped intermittently for each of the plurality of processes and moved so that the packaging bags supplied in the bag feeding process are suspended by the grip pairs with the bag mouth facing up. In a packaging machine that supports, fills a package bag in a state where the bag mouth is opened in the filling process, and seals the bag mouth in a subsequent process,
An arc-shaped guide rail centered on the rotating body is horizontally attached to the upper end portion of the lifting shaft arranged outside the rotating area of the rotating body, and a slider mounted on the guide rail is reciprocally provided by driving means. The slider is provided with a tuning claw means having a pair of tuning claws that are controlled to be opened and closed in a state of being expanded in parallel with the V-shaped closed state,
The driving means is inserted in a state where the elevating shaft is lowered and closed in a V-shape in the previous step of the filling step, and is inserted into the bag mouth, and the synchronization pawl is opened and the bag mouth is tensioned. The slider is moved synchronously with the rotational operation of the rotating body to move to the filling process by the operation of, and at the same time as the filling funnel is inserted into the bag mouth in the filling process, the lifting shaft is raised and the synchronization claw is moved. An opening holding device for a packaging bag in a packaging machine, wherein the device is provided so as to escape from the bag mouth and then move the slider to the original position of the previous step by the operation of the driving means.   The tuning claw means includes two levers each having one of the tuning claws, a control lever having a first roller and a second roller, and a tip that can come into contact with the second roller. A lever and an intermediate lever connected by a transmission rod are provided on a support rod fixed to the slider so as to be able to swing, and a part of the lever of the other tuning claw is provided so as to be able to come into contact with the second roller. A tension cam is stretched on the lever or transmission rod, and when the slider is positioned on the previous process side, a plate cam that swings the control lever by bringing the first roller into contact with the inner surface is provided on the guide rail. When the control lever is pushed down by the plate cam in the previous step, the tuning claw is closed in a V shape, and the control lever swings upward as the slider moves away from the previous step. Opening the holding device of the packaging bag in the packaging machine according to claim 1, characterized in that a tuning pawl so as to expansion.

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