JP2004074569A - Bag laying equipment - Google Patents

Abstract

An object of the present invention is to provide a bag laying device capable of shortening a time required for laying a bag, improving the laying ability and increasing the speed.
A covering unit (51) of a bag covering mechanism (50) is circulated along an inner peripheral circuit and an outer peripheral circuit, and the opening side peripheral edge of a film web (f) loosened above a box (B) is covered with the covering unit (51). Hold with. After the film web f is separated into one bag body F, it is turned inside out by the air C discharged from the injection nozzles 44 and inserted into the box body B. The mouth portion Fa of the bag body F held by the covering units 51 is covered and laid so as to be folded outward with respect to the flaps Ba of the box body B. The covering units 51 are retracted to a position where contact with the bag body F and the box body B is avoided and regressively moved to continue the covering operation of the bag body F.
[Selection diagram] Fig. 1

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a bag laying apparatus used for laying a synthetic resin or paper bag inside a container such as a corrugated cardboard or cardboard box, a synthetic resin or metal container case, or the like. .
[0002]
[Prior art]
Conventionally, as an apparatus for laying the bag of the above example, for example, while transporting a substantially cylindrical film continuous in the length direction by a bag transport mechanism, the bag is separated into a size and a length substantially corresponding to the inside of the box. Then, after one bag is formed, the mouth of the bag is held by the upper claw of the bag transport mechanism, pulled out a predetermined length, and sucked and held by the suction device of the bag expanding mechanism. Open. Subsequently, the mouth of the bag is lowered while holding the opening by the lower claw of the bag lowering mechanism, and the entire upper surface is covered on the opening side peripheral portion of the opened box, and the air blown from the blower is used. There is a bag laying device that inverts a bag and inserts and lays it inside the box.
[0003]
[Patent Document 1]
JP-A-11-138664
[Problems to be solved by the invention]
However, since the above-described apparatus holds the full length of the bag separated by the bag transporting mechanism into a size substantially corresponding to the inside of the box, the operation of pulling out the full length of the bag, the operation of turning the inside out, and the inside of the box It takes time and effort to perform the operation of inserting it into the device. Further, as the volume inside the box increases, the overall length of the bag increases, so that the operation time required when laying one bag increases, the laying capacity of the entire apparatus is low, and the laying speed is increased. Is difficult.
[0005]
In addition, when the bag side is vertically lowered or the box side is vertically raised, not only the structure of the entire apparatus becomes complicated, but also the time loss of the driving part becomes large, and the work efficiency becomes poor. Have.
[0006]
In view of the above problems, the present invention moves a pair of bag covering means around the inner peripheral circuit and the outer peripheral circuit, and holds the mouth of the bag body loosened above the container with the pair of bag covering means. An object of the present invention is to provide a bag laying device capable of shortening the time required for laying a bag body by covering the peripheral portion on the opening side of the container, improving the laying capacity and increasing the speed.
[0007]
[Means for Solving the Problems]
The present invention is a bag laying device for folding a mouth portion of a bag body outward to cover a peripheral portion on an opening side of a container, and laying a bottom portion of the bag body along an inner wall surface of the container. Bag opening means for opening the mouth of the body above a container supplied to the lower part of the bag body, and holding the bag body slackened in the longitudinal direction above the container, and the bag opening means Bag receiving means for inserting the loosened portion of the bag held by the bag into the container supplied to the lower part of the bag, and receiving the mouth of the bag opened by the bag opening means, and opening the container. A pair of bag covering means which expands to a size capable of covering the side peripheral portion, and the pair of bag covering means, from a receiving position for holding a mouth portion of the bag held by the bag opening means, The bag body is circulated along the inner peripheral circuit toward the coating position where the opening is covered with the opening side peripheral edge of the container. And characterized in that it is a bag laying apparatus and a moving means for regressive moving along the outer circumferential path toward the receiving position from the covering position.
[0008]
The above-mentioned bag body can be constituted by a bag body or the like made of a single material or a composite material such as synthetic resin or paper. Further, the container can be constituted by, for example, a box made of cardboard or cardboard, a container made of plastic, metal, or wood. Further, the bag opening means and the bag covering means can be constituted by, for example, a chuck, a suction element, an arm and the like. Further, the bag inserting means can be composed of a fluid such as a gas (air or gas) or a liquid discharged from the injection nozzle, for example. Further, the moving means can be constituted by, for example, a chain, a belt, a guide rail, a motor and the like.
[0009]
In other words, the mouth of the bag formed in a size substantially corresponding to the inside of the container (for example, a box made of corrugated paper) is opened by the bag opening means, and the bag is placed above the container in the length direction. It is kept in a slackened state (for example, a gathered state). The loosened portion of the bag is inserted (for example, turned upside down and inserted) into the container by bag insertion means (for example, the discharge force of air discharged from the injection nozzle), and the bag opening means is opened. The mouth is received by a pair of bag covering means, and after expanding to a size capable of covering the peripheral portion on the opening side of the container, the pair of bag covering means, the mouth of the bag held by the bag opening means. From the receiving position to be held, the bag is moved by the moving means along the inner peripheral circuit toward the coating position where the mouth of the bag is covered by the opening side peripheral edge of the container, and the mouth of the bag is opened at the opening of the container. It covers the side peripheral part (for example, the flap of a box body) in the state folded outside. After releasing the holding of the bag body, the bag covering means is retracted to a position where contact with the bag body and the container is avoided, and moved back along the outer peripheral circuit from the covering position to the receiving position. Is continuously carried out.
[0010]
As an embodiment, the pair of bag covering means, the close state in which the mouth of the bag held by the bag opening means is received and allowed, and the mouth of the bag with respect to the opening side peripheral edge of the container are It can be provided so as to be relatively movable to a separated state where the coating is allowed. In addition, a substantially tubular package (for example, a substantially tubular film or wrapping paper folded in a flat state) folded in a flat state is provided at a stage substantially corresponding to the inside of the container in front of the bag opening means. A bag separating means (for example, a cutting blade and a heating head, and a cutting tool such as a cutter or scissors) can be provided. Further, a container conveying means (for example, a conveying means such as a chain conveyor, a belt conveyor, or a roller conveyor) for conveying the container can be provided at a position where the insertion of the bag held by the bag opening means is allowed.
[0011]
[Action and effect]
According to the present invention, a pair of bag covering means is moved around the inner peripheral circuit and the outer peripheral circuit, and the opening of the bag body slackened above the container is held by the pair of bag covering means. Since the coating is applied to the opening side peripheral portion of the container supplied to the lower part of the body, the relative movement distance between the bag and the container is shortened, and the time required for laying one bag is greatly reduced. Thus, the laying ability can be improved and the speed can be increased.
[0012]
In addition, since the pair of bag covering means retreats to a position where contact with the bag and the container is avoided, and moves around, the mouth of the bag may be rolled up when covering and laying the next bag. In addition, it is possible to prevent the container from falling off from the peripheral portion on the opening side of the container and to prevent the container itself from falling down, and to maintain a predetermined covering state and a laying state.
[0013]
【Example】
An embodiment of the present invention will be described below in detail with reference to the drawings.
The drawing shows a bag laying device used for laying a bag inside a box having an open top as an example of a container, and in FIGS. 1 and 2, the bag laying device 10 is formed into a roll. A supply mechanism 20 for supplying the wound tubular film raw material f, and a bag separating mechanism for separating the film raw material f into a size and a length substantially corresponding to the box B (one bag F). 30, a bag opening mechanism 40 for holding the opening side peripheral portion of the film web f and the bag body F at a predetermined size, and a mouth Fa of the separated bag body F as the opening side peripheral edge of the box B. It comprises a bag covering mechanism 50 laid in a state of covering the parts (see FIG. 8), and a transport conveyor 60 for transporting a box B in which the bags F are laid.
[0014]
The above-described supply mechanism 20 is provided on one side of the conveyor 60 disposed in the lower center of the apparatus, and folds the synthetic resin film f into a flat state (for example, a gusset-folded state or a flat-folded state). The film is wound into a roll and loaded into the loading section 21, and the film source f pulled out of the loading section 21 is passed through a dancer roll 22 and guide rolls 23, 24, 25 to form a bag separation mechanism described later. Feed continuously to 30. Instead of the film raw material f, for example, bags F formed in a predetermined size may be supplied one by one, or bags F made of paper or a composite of synthetic resin may be supplied.
[0015]
As shown in FIGS. 3, 4, and 5, the bag separating mechanism 30 moves the feed rolls 26 and 27 to face the front and rear surfaces of the film web f supplied on the pay-out path. The feed rolls 26 and 27 are rotated at a constant speed in the feed direction by the driving force of a motor (not shown), and the film roll f is moved to the open position a. It is supplied to a space between a pair of opening rolls 28 supported by a shaft.
[0016]
A pair of opening rolls 28 are pivotally supported so as to be able to adjust the rotation angle opposite to the front and rear surfaces of the film web f supplied to the opening position a. And a negative pressure generating means (not shown), such as an intake blower or a vacuum pump, is connected thereto.
[0017]
That is, the pair of opening rolls 28 are rotated forward and backward by a rotating means such as a motor or a cylinder, so that the suction holes 28a are opposed to the front and rear surfaces of the film raw material f supplied to the opening position a. It rotates to the horizontal angle and the downward angle at which the opening side peripheral portion of the film web f or the input port Fa of the packaging bag F is peeled open.
[0018]
When the suction holes 28a of the suction roll 28 are brought into close contact with the front and rear surfaces of the film raw material f, the negative pressure generated by the negative pressure generating means causes the opening side peripheral portion of the film raw material f or the charging port of the packaging bag F to enter. When the suction opening of the film web f or the opening Fa of the packaging bag F is held by the bag opening mechanism 40 to be described later, the negative pressure of the negative pressure generating means is shut off or stopped, and the suction holding is performed. Cancel.
[0019]
Further, the cutting blade 31 and the receiving head 32 are disposed opposite to the front and rear surfaces of the film web f supplied to the opening position a, and the reciprocating cylinders 33a and 33b disposed on the right and left sides at the same position. The cutting blade 31 cuts the raw film f, which has been heat-sealed by the heating head 34 described below, in the width direction immediately after the closing portion (sealing portion), and separates it into one packaging bag F.
[0020]
Further, the heating head 34 and the receiving head 35 are disposed so as to face the upper and lower surfaces of the film web f supplied on the feeding path at the front stage of the opening position a, and the holding cylinder 36 provided at the upper part of the feeding path. The upper and lower surfaces of the raw film f are pressed by the heating head 34 and the receiving head 35 by the operation of the receiving cylinder 37 disposed below the feeding path, and the pressed portion is heat-sealed in the width direction.
[0021]
The bag opening mechanism 40 is provided between the bag separating mechanism 30 and the bag opening mechanism 40, as shown in FIGS. 6 and 7, and is fed to a lower portion of the opening rolls 28, 28. A pair of opening units 41 for holding the raw material f and the opening side peripheral edge of the bag body F are attached to the free end side of a support arm 42 vertically suspended on both upper sides of the bag separation mechanism 30, and the base end side of the support arm 43. Are pivotally connected to pivot portions 43 provided on both upper sides of the bag separating mechanism 30. In other words, the pair of support arms 42 are rotated in the left and right direction substantially synchronously by, for example, a rotating means such as a motor or a cylinder, and the pair of opening units 41 are fed to the lower portions of the opening rolls 28, 28. f and the bag F is vertically rotated to a closed angle position for holding the opening-side peripheral portion of the bag body F and an open angle position for holding the opening to a size that can be held by a pair of covering units 51 described later.
[0022]
In addition, the opening unit 41 includes a pair of chucks 41a for sandwiching the opening side peripheral portion of the film raw material f and the bag body F fed to the lower portion of the feed rolls 26, 26, and the chucks 41a. The opening / closing cylinder 41b that opens and closes between a closed position where the opening side peripheral edge is pinched and an open position where the pinching is released.
[0023]
Further, a pair of injection nozzles 44 connected to a gas supply source (for example, a compressor or a blower blower) are laid on the upper surface side (inside the box B) of the film web f held by the opening units 41. A plurality of sets are arranged to face the inner side of the case. That is, by the discharge force of the air C discharged from the injection nozzles 44, the bag body F, which is opened and held by the covering units 51, described later, is turned upside down in the direction in which the bag body B is laid inside the box body B. To be laid along the inner wall and corners of the vehicle. Further, as another example of the ejected material instead of the air C, for example, a gas or a liquid (alcohol, ethanol) or the like may be used.
[0024]
The bag covering mechanism 50 is provided below the bag opening mechanism 40 and includes a pair of covering units 51 that hold the original film f opened by the opening units 41 and the peripheral portion of the bag F on the opening side. The entire length of the loop-shaped loop chain 52 which is inside the peripheral edge of the opening side of the film web f and the bag body F held by the opening units 41 and on both sides of the loading position b on the conveyor 60. Are mounted at predetermined intervals.
[0025]
That is, the orbiting chain 52 is rotated in the orbital direction substantially synchronously by the driving force of a motor with a speed reducer (not shown), and the pair of covering units 51 are opened by the opening units 41. From the receiving position holding the portion Fa, to the covering position (from the flaps Ba of the box B) to the flaps Ba of the box B conveyed to the loading position b on the conveyor 60. Also moves downward) along the inner peripheral circuit. On the other hand, it is retracted to a position where contact with the bag body F and the box body B is avoided, and recursively moves along the outer peripheral circuit from the covering position to the receiving position.
[0026]
In addition, when the pair of covering units 51 move up to the receiving position, the opening Fa of the bag body F held by the opening units 41 is relatively moved to a close state in which receiving is permitted, and when the covering unit 51 descends to the covering position, While being retracted to a position where contact with the body F and the box B is avoided, the mouth Fa of the bag F is relatively moved with respect to the flaps Ba.
[0027]
The covering unit 51 includes chucks 51a and 51b that sandwich the opening-side peripheral portion of the bag F held by the opening unit 41 and the chucks 51a and 51b. It comprises open / close cylinders 51c and 51d that open and close between a closed position where the holding is performed and an open position where the holding is released. Further, the entire covering unit 51 is moved forward between the opening position of the bag F and the retreat position where the covering unit 51 is retracted outside the opening Fa of the bag F covered with the flaps Ba of the box B. And a forward / backward motor 51e that moves to the right. Further, as another example of the opening / closing means instead of the opening / closing cylinders 33a, 33b, 36, 41b, 51c, 51d, the opening / closing can be performed by a solenoid, a motor, a cam mechanism, or the like.
[0028]
As shown in FIG. 2, the above-mentioned transport conveyor 60 (chain conveyor) stretches a feed chain 61 between sprockets 62 pivotally supported at a start end and an end, and is substantially L-shaped when viewed from the side. Are attached at predetermined intervals (for example, intervals at which one box B is loaded) with respect to the entire length of the feed chain 61, and the bottom surfaces of both sides of the box B are substantially attached. Support plates 64 that support horizontally are installed on both sides of the transport path substantially in parallel with the feeding direction.
[0029]
In addition, the feed chain 61 is rotated in the feed direction via the sprockets 65a and 65b and the chain 65c by the driving force of the motor 65 equipped with a speed reducer disposed at the lower part on the start end side, and the box placed on the feed chain 61 The containers B are conveyed one by one to the loading position b on the conveyance path at the lower portion of the bag F held open by the above-described opening units 41. (For example, a box packing process or a bag packing process).
[0030]
Further, the feed belt 66 stretched on the start end side is rotated in the feed direction by a motor with a speed reducer (not shown), and the box B having the entire upper surface supplied from the box making process (not shown) is opened. It is transferred onto the feed chain 61. In addition, the box B can be shifted to the reference position side by a shifter such as a pusher, an arm, or a guide. Further, as a supporting means instead of the supporting plate 64, for example, rotating bodies such as rollers and rollers may be arranged at equal intervals.
[0031]
The illustrated embodiment is configured as described above, and the laying operation of the bag body F by the bag laying device 10 will be described below.
[0032]
First, as shown in FIGS. 1 and 2, a box B (for example, a cardboard box or a container) supplied from a box-making process (not shown) and having an open top surface is placed on the opening side of the box B. The flaps Ba... Connected to the periphery are transported by the transport conveyor 60 while standing substantially vertically, and temporarily stopped at the loading position b.
[0033]
Next, as shown in FIGS. 3, 4 and 5, after the opening side peripheral portion of the film raw material f fed from the loading unit 21 of the supply mechanism 20 is suction-held by a pair of suction rolls 28, The inner facing surface of the film web f is separated or peeled left and right by the rotational force of the pair of suction rolls 28 against the suction force of, for example, static electricity or oil, and the opening side peripheral portion of the film web f is described later. Are preliminarily opened to a size that can be held by the opening units 41. At the same time, the bag separating mechanism 30 is driven to heat-seal the film raw material f fed out by a length substantially corresponding to the inside of the box B in the width direction by the heating head 34.
[0034]
Next, the bag opening mechanism 40 is driven so that the opening side margins (four corners) of the film raw material f fed out below the opening rolls 28, 28 are clamped by the opening units 41, and a bag covering mechanism described later. The opening is large enough to be held by the 50 coating units 51. In addition, the film raw material f is fed by a discharge force of the air C discharged from the injection nozzles 44 by a size and length substantially corresponding to the inside of the box B set in advance, and the fed portion is fed in the length direction. After holding in a slackened state (or a gathered meandering state), the upper portion of the film web f above the heat-sealed portion is cut in the width direction by the cutting blade 31 to remove the inside of the box B and The bag is separated into one bag F having a substantially corresponding size.
[0035]
Next, as shown in FIGS. 6 and 7, the opening Fa of the bag body F opened by the opening units 41 of the bag opening mechanism 40 is held by the coating chucks 51 of the bag coating mechanism 50 waiting at the receiving position. After being held, the holding by the opening units 41 is released. Subsequently, the mouth portion Fa of the bag body F held by the covering unit 51 is lifted above the opening unit 41 to open to a size covered with the flaps Ba of the box body B, and the opening unit is opened. 41 ... displaced inward. Thereafter, in the same manner as described above, the opening units 41 of the bag opening mechanism 40 are vertically rotated to continue the opening operation of the film web f and the bag body F.
[0036]
Subsequently, the air C discharged from the spray nozzles 44 is blown onto the upper surface side (slack portion) of the bag body F opened and held by the covering units 51. After being turned upside down in the direction of insertion into the inside (downward state or hanging state), and expanded and inserted into a size substantially corresponding to the inside of the box B, the covering units 51 are moved from the receiving position to the covering position. Is moved downward along the inner peripheral circuit toward the airbag, and the opening Fa of the bag body F is removed from the flaps Ba of the box body B while removing air remaining between the opposing surfaces of the bag body F and the box body B. It is covered so as to be folded outward, and laid along the inner wall and corners of the box B (see FIG. 8). Thereafter, the holding by the coating units 51 is released.
[0037]
Next, after the covering units 51 are lowered below the mouth Fa of the bag body F covered with the flaps Ba of the box B and retracted to the outside, the covering units 51. It is retracted to a position where contact with the body F and the box B is avoided, and is moved back along the outer peripheral circuit from the covering position to the receiving position, and the opening is held by the opening units 41 of the bag opening mechanism 40. The opened next bag F is held open. Hereinafter, in the same manner as described above, the covering units 51 of the bag covering mechanism 50 are circulated to continue covering and laying the bag body F.
[0038]
As described above, the covering units 51 of the bag covering mechanism 50 are moved around in a loop along the inner peripheral circuit and the outer peripheral circuit to cover the opening Fa of the bag F loosened above the box B. The flaps Ba of the box B supplied to the lower part of the bag F are covered with the unit 51 so as to cover the flaps Ba of the bag B in an outwardly folded state. There is no need to descend, and the relative movement distance between the bag body F and the box body B is shortened, so that the time required for laying one bag body F can be greatly reduced, and the laying ability is improved. In addition, the speed can be increased.
[0039]
In addition, since the covering unit 51 is moved around and retreated to a position where contact with the bag body F and the box body B is avoided, when the next bag body F is covered and laid, the opening of the bag body F is opened. It is possible to prevent the part Fa from rolling up, falling off from the flaps Ba of the box body B, and from falling down, and can be kept in a predetermined covering state and a laid state.
[0040]
Further, since the bag F is held in a state of being slackened in the length direction above the box B, there is no need to variably adjust the relative distance between the bag F and the box B, and the bag F Can be set substantially corresponding to the size of the inside of the box B having various sizes.
[0041]
9 and 10 show another method of peeling the film web f and the bag body F. The separation rolls 67 are attached at predetermined intervals to the entire length of the support shaft 67a, and the support shafts 67a are attached to the side surfaces. A separation unit 68, which is suspended between crossed support plates 67b, 67b connected in a substantially X-shape as viewed from above, is inserted into the inside of the film web f pulled out from the loading unit 21, and is positioned above the opening position a. And is rotatably held by feed rolls 69, 69 arranged in the first position.
[0042]
That is, the feed rolls 69, 69 are rotated in the feed direction by a driving force of a motor (not shown), and the rotation force causes the separation rolls 67 of the separation unit 68 to be driven to rotate in the feed direction. The opening side peripheral portion of the film raw material f is preliminarily opened while separating or peeling the inner facing surface of the film f against the adsorbing force of, for example, static electricity or oil, so that the operation is substantially the same as that of the above-described embodiment. And effects can be obtained. Further, the regulating rollers 70, which are pivotally opposed to both ends of the separation unit 68, regulate the separation unit 68 to a position where the separation unit 68 is inserted into a substantially central portion of the raw film f.
[Brief description of the drawings]
FIG. 1 is a front view showing a laying operation by a bag laying device.
FIG. 2 is a side view showing a transport operation of the box by the transport conveyor.
FIG. 3 is an enlarged front view showing an operation of separating a film and a bag body by a bag separating mechanism.
FIG. 4 is a front view showing a separating operation of the bag separating mechanism and an opening operation of the bag opening mechanism.
FIG. 5 is a front view showing a heat sealing operation of the bag body by the bag separating mechanism.
FIG. 6 is a front view showing the opening operation of the bag opening mechanism and the covering operation of the bag covering mechanism.
FIG. 7 is a plan view showing an opening operation by a bag opening mechanism and a bag covering mechanism.
FIG. 8 is a perspective view showing a state in which the bag is laid inside the box.
FIG. 9 is a front view showing another peeling method by the bag separating mechanism.
FIG. 10 is a plan view showing a peeling operation by the bag separating mechanism.
[Explanation of symbols]
f: raw film F: bag Fa: mouth B: box Ba: flap C: air 10: bag laying device 20: supply mechanism 30: bag separating mechanism 40: bag opening mechanism 41, opening unit 44, spray nozzle 50: bag coating mechanism 51: coating unit 60: conveyor

Claims (4)

A bag laying device that folds the mouth of the bag outward to cover the opening side peripheral edge of the container and lays the bottom of the bag along the inner wall surface of the container,
Bag opening means for opening the mouth of the bag above a container supplied to the lower part of the bag, and holding the bag in a state of being slackened in the length direction above the container;
Bag insertion means for inserting the loosened portion of the bag held by the bag opening means toward the inside of the container supplied to the lower part of the bag,
A pair of bag covering means for receiving the mouth of the bag body opened by the bag opening means and expanding to a size capable of covering the opening side peripheral portion of the container,
The pair of bag covering means is moved inward from a receiving position where the bag opening means holds the mouth of the opened bag to a covering position where the mouth of the bag is covered on the opening side peripheral portion of the container. A bag laying device comprising: moving means that moves around the peripheral circuit and moves back along the outer peripheral circuit from the coating position to the receiving position. The pair of bag covering means is in a proximity state in which the mouth of the bag held by the bag opening means is allowed to be received, and the space in which the mouth of the bag is allowed to cover the opening side peripheral edge of the container. 2. The bag laying device according to claim 1, wherein the bag laying device is provided so as to be relatively movable with respect to the state. 2. The bag laying device according to claim 1, further comprising a bag separating means for supplying a substantially cylindrical package folded in a flat state to a size substantially corresponding to the inside of the container at a stage preceding the bag opening means. apparatus. 2. The bag laying device according to claim 1, further comprising a container transporting unit that transports the container at a position where insertion of the bag held by the bag opening unit is allowed.

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