JP2003112709A - Bag laying equipment - Google Patents

Abstract

(57) [Summary] [Problem] To reduce the time required for laying a bag,
Provided is a bag laying device capable of improving the laying capacity and increasing the speed. A film unit f is separated or separated by a separation unit 28, and an opening side peripheral portion of the film base f is held by a bag opening mechanism 40 and preliminarily opened to open the film base f. It is held together in the length direction. The raw film f is separated into bags F having a size substantially corresponding to the inside of the box B by the bag separating mechanism 30, and the opening Fa of the preliminarily opened bag F is held by the bag covering mechanism 50. Opened to a predetermined size, the gathered portion of the bag F is turned upside down by the air C discharged from the spray nozzles 44, and inserted into the box B conveyed by the conveyor 60, and the bag covering mechanism The mouth Fa of the bag F held by the cover 50 is covered with the flaps Ba... Of the box B and laid along the inner wall and the corners of the box B.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the work of laying a bag made of synthetic resin or paper inside a container such as a box made of corrugated paper or cardboard, a container case made of synthetic resin or metal. The present invention relates to a bag laying device used for.

[0002]

2. Description of the Related Art Conventionally, as a device for laying the above-mentioned bag body, for example, a substantially cylindrical film continuous in the length direction is conveyed by a bag body conveying mechanism, and a size substantially corresponding to the inside of the box body is obtained. After separating into lengths and forming one bag, the mouth of the bag is held by the upper claw of the bag transport mechanism and pulled out for a predetermined length, and by the suction device of the bag expansion mechanism. Hold by suction and open. Next, the mouth of the bag is lowered by the lower claw of the bag lowering mechanism while holding the opening, and the entire upper surface is covered with the opening side peripheral edge of the box, and by the air blown from the blower. Turn the bag upside down,
Bag laying device to be inserted and laid inside the box (Japanese Patent Laid-Open No. 11-
138664).

[0003]

However, in the above-mentioned apparatus, since the bag whole length separated into a size substantially corresponding to the inside of the box is held by the bag body conveying mechanism, the bag whole length can be pulled out or the front and back sides can be pulled out. It takes time and effort to turn it over or insert it inside the box. Moreover, as the volume size inside the box increases, the total length of the bag becomes longer, so the time required to lay one bag is delayed, the laying capacity of the entire device is low, and the laying speed is increased. It is difficult to do so.

Further, 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 portion becomes large, resulting in poor work efficiency. I have a problem.

In view of the above problems, the present invention holds the bags in a state of being gathered together in the lengthwise direction and supplies the container having the entire upper surface opened to the lower part of the bags, so that the bags are laid. It is an object of the present invention to provide a bag laying device that can shorten the time required for the operation, improve the laying capacity, and increase the speed.

[0006]

SUMMARY OF THE INVENTION According to the present invention, a bag laying device for covering the mouth of a bag with a peripheral edge of an opening of a container and laying the bottom of the bag inside a container having an entire upper surface opened. A bag opening means for opening the mouth portion of the bag body having a size substantially corresponding to the inside of the container and holding the bag body in a state of being gathered together in the longitudinal direction; Holding the bag collecting means held by the means, the bag inserting means for inserting toward the inside of the container supplied to the lower part of the bag, and the mouth of the bag opened by the bag opening means, The bag laying device is provided with a bag covering means for covering the peripheral portion on the opening side of the container.

The above-mentioned container can be constituted by, for example, a box made of corrugated cardboard or cardboard, a container made of plastic or metal, a wooden container, or the like. The bag body can be composed of, for example, a bag body made of synthetic resin or paper, a bag body made of a composite of synthetic resin and paper, and the like. The wrapping body can be formed of, for example, a substantially tubular film or wrapping paper folded in a flat state. The bag inserting means can be composed of fluid such as gas (air or gas) or liquid discharged from the injection nozzle. The bag opening means and the bag covering means can be configured by, for example, a chuck, an adsorbent, an arm, or the like.

That is, the bag opening means preliminarily opens the mouth of the bag formed to have a size substantially corresponding to the inside of the container, and the bag is gathered in the longitudinal direction (for example, with slack). State). After supplying a container (for example, a box made of corrugated cardboard) whose entire upper surface is opened to the lower part of the bag, the bag inserting means (for example, the ejection force of the air ejected from the injection nozzle) is used to collect the gathered portions of the bag. Insert it toward the inside (for example, flip it over and insert it). While holding the mouth portion of the pre-opened bag body by the bag covering means and covering the opening side peripheral portion (for example, the flap of the box body),
The bag is laid along the inner wall and the corner of the container.

As an embodiment, a bag body to be supplied to the bag opening means is provided in front of the bag opening means, and a substantially cylindrical package which is continuous in the length direction substantially corresponds to the inside of the container. A bag separating means (for example, a cutting blade and a heating head, a cutting tool such as a cutter or scissors) that is formed by being separated into sizes can be provided. In addition, in the preceding stage of the bag separating means, a package peeling means that is inserted and held in the width direction inside the package and applies a biasing force to a direction in which the inner facing surface of the package is peeled (for example, A rotating body such as a roll or a ball, or a member having a small contact resistance) can be provided. Further, container conveying means (for example, a conveying means such as a chain conveyor, a belt conveyor, or a roller conveyor) for conveying the above-mentioned container can be provided on the lower part of the bag body that is opened and held by the bag opening means.

[0010]

According to the present invention, since the bag body is held in a state of being gathered in the longitudinal direction and the container whose whole upper surface is opened is supplied to the lower portion of the bag body, the bag body and the container The relative moving distance between and can be shortened, the time required for laying a single bag can be significantly shortened, and the laying capacity can be improved and the speed can be increased.

Moreover, since the inner facing surface of the bag body is separated and peeled by the package peeling means and preliminarily opened, the bag opening means and the bag covering means do not cause opening errors, and the bag body opening and laying operations are performed. Can be performed accurately and reliably, and high reliability can be obtained as a bag laying device.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. The drawings show a bag laying device used for the work of laying a bag inside a box body having an opening on the entire upper surface, which is an example of a container. In FIG. 1 and FIG.
A supply mechanism 20 for supplying a cylindrical film original fabric f wound in a roll shape, and the film original fabric f is separated into a size and a length substantially corresponding to the box B (one bag F). The bag separating mechanism 30, the bag opening mechanism 40 that holds the original film f and the peripheral edge of the bag F on the opening side to a predetermined size, and the opening Fa of the separated bag F into the box B. A bag covering mechanism 50 that is laid (see FIG. 8) so as to cover the peripheral portion of the opening side.
And a transport conveyor 60 that transports the box B on which the bag F is laid.

The above-mentioned supply mechanism 20 is provided on one side of the conveyer conveyor 60 arranged at the center of the lower part of the apparatus, and the synthetic resin film raw material f is flattened (for example, gusset folded state or flat folded state). ) Is folded into a roll and wound into a roll to be loaded into the loading section 21, and the original film f drawn from the loading section 21 is fed to the dancer roll 22, the guide rolls 23, 24 and 25, and a pair of feeds. It is continuously supplied to the bag separating mechanism 30 described later via the roll 26.
Further, instead of the film original fabric f, for example, the bags F formed in a predetermined size may be supplied one by one, or the bags F made of paper or synthetic resin may be supplied.

Further, as shown in FIGS. 3 and 4, the separation unit 28 assembled in a substantially crossed state when viewed from the side.
Is inserted in the width direction into the inside of the original film f drawn from the loading section 21, and is held rotatably by a pair of feed rolls 26 arranged above the separation position a.
That is, the pair of feed rolls 26 is rotated substantially in synchronization with the feed direction by the driving force of a motor with a speed reducer (not shown), and the rotational force drives the separation rolls 27 of the separation unit 28 to follow the feed direction. To do.

The above separating unit 28 is composed of the separating roll 2
7 is attached at a predetermined interval to the entire length of a support shaft 27a formed to be shorter than the width of the original film f, and the support shaft 27a is provided at an interval that is narrower than the original film f. The support plates 27b, 27b thus installed are axially mounted between the upper and lower end portions thereof, and the support plates 27b, 27b are pivotally attached so as to intersect each other in a substantially X shape when viewed from the side, and compressed between the support plates 27b, 27b. By the restoring force of the loaded coil spring 27c (or an elastic body such as synthetic rubber), the upper and lower separating rolls 27
Is urged in the direction in which it is pressed against the upper and lower peripheral surfaces of the feed roll 26, and imparts a separating force in the direction in which the inner facing surface of the original film f is separated and separated.

Further, the regulation rollers 29, 29 axially supported so as to face both ends of the separation unit 28 are
Is regulated at a position where it is inserted in the substantially central portion of the original film f. Further, as another example of the restricting means in place of the restricting roller 29, it is possible to restrict by a guide plate or a guide arm, for example.

As shown in FIG. 5, the bag separating mechanism 30 described above is provided at a separating position a set on the upper part of the apparatus, and has a pressing member 31a formed in a shape that allows the cutting blade 34 to be retracted and retracted, which will be described later. The pressing member 31b formed in a shape that avoids contact with the cutting blade 34,
It is attached to the support frames 32a and 32b so as to face both side surfaces of the original film f that is drawn out to the lower portions of 6, 26.

Further, the advancing / retreating cylinder 33a fixed to the support frame 32a moves the cutting blade 34 back and forth (or horizontally) in the direction opposite to the film raw fabric f sandwiched by the pressing members 31a and 31b, to move the film raw film. The fabric f is cut in the width direction and separated into a predetermined length corresponding to the size of the box B.

Further, the advancing / retreating cylinder 33b fixed to the support frame 32b holds the heating head 35 against the pressing members 31a, 31.
The film original fabric f sandwiched by b is moved back and forth (or horizontally moved) in the direction opposite to the lower side of the cutting side, and the film original fabric f (or the bottom side of the separated bag F) is pressed against the heating head 35. It is pressed by the member 31a and heat-sealed in the width direction. Further, as a cutting means instead of the cutting blade 34, a blade such as a cutter or a rotary blade may be moved in the width direction for cutting.

Further, the advancing / retreating cylinder 36 connected to the rear surfaces of the supporting frames 32a and 32b includes the cutting blade 34 and the heating head 3.
The whole 5 is relatively moved with respect to the direction facing the opening side peripheral edge of the original film f.

As shown in FIGS. 6 and 7, the bag opening mechanism 40 is provided between the bag separating mechanism 30 and the bag opening mechanism 40, and is fed to the lower portions of the feed rolls 26, 26. A pair of opening units 41 that hold the opening side peripheral edge portions of the original film f and the bag body F that have been formed are attached to the free end sides of the support arms 42 that are hung vertically on both upper sides of the bag separation mechanism 30, and the support arms 43 The base end side is rotatably attached to the pivotally supporting portions 43 provided on both upper sides of the bag separating mechanism 30. That is, the pair of support arms 42 is rotated in the left-right direction substantially in synchronization with the driving force of a motor (not shown) with a reduction gear, and the pair of opening units 41 is fed by the parallel link operation of the support arms 42. A closed angle position for sandwiching the opening side peripheral edge portions of the film original fabric f and the bag body F, which are fed to the lower portions of the rolls 26, 26, and an open angle position for opening and holding them to a size that can be retained by a pair of covering units 51 described later It rotates up and down.

In addition, the opening unit 41 includes a pair of chucks 41a for sandwiching the opening-side peripheral edge portions of the original film f and the bag body F, which are fed below the feed rolls 26, 26.
And an opening / closing cylinder 41b that opens and closes the chuck 41a between a closed position where the opening side peripheral edge of the original film f is held and an open position where the holding is released.

Further, an injection nozzle 44 connected to a gas supply source (for example, a compressor, a blower or the like) is laid on the upper surface side (the inside of the box B) of the original film f held by the opening unit 41. A plurality of them are arranged so as to face the inner surface when the above is done). That is, the bag body F, which is opened and held by the covering unit 51, which will be described later, by the ejection force of the air C ejected from the ejection nozzles 44.
It is turned upside down in the direction in which it is laid with respect to the inside, and expanded to a size that is laid along the inner wall and corners of the box B. In addition, as another example of the discharged material that replaces the air C,
For example, gas or liquid (alcohol, ethanol) or the like may be used.

The bag covering mechanism 50 described above is provided below the bag opening mechanism 40, and is a pair of covering units for holding the opening side peripheral edge portions of the original film f and the bag body F opened by the opening units 41. 51 is attached to an elevating chain 52 stretched on both sides of the loading position b on the conveyor 60. That is, the lifting chain 52 is rotated in the vertical direction in the forward and reverse directions substantially in synchronization with the driving force of a motor with a speed reducer (not shown), and the pair of covering units 51 is opened and held by the opening unit 41. The inside of the opening-side peripheral portion of the body F, the rising position for holding the opening-side peripheral portion of the bag body F opened and held by the opening unit 41, and the mouth portion Fa of the bag body F on the transport conveyor 60. Moves up and down to a covering position for covering the flap Ba of the box B conveyed to the loading position b and a descending position for descending below the flap Ba of the box B. Further, as another example of the elevating means instead of the elevating chain 52, for example, an elevating cylinder, a crank mechanism, a cam mechanism or the like can be used for raising and lowering.

In addition, the covering unit 51 includes chucks 51a and 51b for sandwiching the peripheral edge portion of the bag body F held by the opening unit 41 on the opening side, and the chuck 5 thereof.
The opening and closing cylinders 51c and 51d are configured to open and close 1a and 51b between a closed position where the opening-side peripheral edge of the bag F is held and an open position where the holding is released. In addition, the covering unit 51 as a whole is in a forward position where it holds the opening-side peripheral edge of the bag F, and a retracted position in which the flap Ba of the box B is retracted outside the mouth Fa of the bag F covered by the flap Ba. It has an advancing / retreating motor 51e that moves to and from. Further, as another example of the opening / closing means instead of the opening / closing cylinders 33a, 33b, 36, 41b, 51c, 51d, for example, a solenoid, a motor, a cam mechanism or the like can be used for opening / closing.

As shown in FIG. 2, the above-described transport conveyor 60 (chain conveyor) has a feed chain 61 stretched between sprockets 62 axially supported at the start end portion and the end portion thereof, and viewed from the side. The feed member 63 (for example, an attachment) formed in an L shape is arranged at a predetermined interval (for example, an interval at which one box B is loaded) with respect to the entire length of the feed chain 61.
Support plates 64, which are attached separately from each other and support the bottoms of both sides of the box B in a substantially horizontal manner, are provided on both sides of the transport path substantially in parallel with the feeding direction.

Further, 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 with a reduction gear arranged at the lower part of the starting end side, and placed on the feed chain 61. The box body B is opened and held by the above-mentioned opening unit 41 ..
The boxes B are laid one by one, and the boxes B already laid are carried to the next step (for example, a box packing step or a bag packing step).

Further, the feed belt 66 stretched on the starting end side.
Is rotated in the feeding direction by a motor with a speed reducer (not shown), and the box body B, which is supplied from the box making process (not shown) and whose entire upper surface is opened, is transferred onto the feeding chain 61.
In addition, the box body B can be moved to the reference position side by a width adjusting means such as a pusher, an arm, or a guide.

The box B can also be transported by a roller conveyor, a belt conveyor or the like as a transportation means instead of the transportation conveyor 60. In addition, the support plate 64
As an alternative supporting means, for example, rotating bodies such as rollers and rollers may be arranged at equal intervals.

The illustrated embodiment is configured as described above, and the laying operation of the bag body F by the bag laying apparatus 10 will be described below.

First, as shown in FIGS. 3 and 4, before the work is started, the separation unit 28 is inserted into the original film f drawn from the loading section 21 of the supply mechanism 20, and a pair of feeds is fed. After being held so as to be freely rotatable between the rolls 26, the separation rolls 27 of the separation unit 28 are driven to rotate by the rotational force of the feed rolls 26 in the feed direction,
While separating or peeling the inner facing surface of the original film f against the attraction of static electricity or oil, the peripheral edge of the original film f on the opening side is preliminarily opened to form the feed roll 2
6 and 26 are extended to the lower part for a predetermined length.

On the other hand, as shown in FIGS. 1 and 2, a box B (for example, a cardboard box, a container, etc.), which is supplied from a box making process (not shown) and whose entire upper surface is opened, is
The flaps Ba ... Consecutively provided on the opening side peripheral portion are conveyed by the conveyer 60 while standing substantially vertically, and temporarily stopped at the loading position b.

Next, as shown in FIG. 5, the bag opening mechanism 4
0 is driven to sandwich the opening side peripheral edge portions (four corner edge portions) of the original film f fed to the lower parts of the feed rolls 26, 26 by the opening units 41, and the covering unit 51 of the bag covering mechanism 50 described later. Open to a size that can be held. At the same time, the original film f is fed to the feed rolls 26, 26.
And the ejection force of the air C ejected from the ejection nozzles 44, the same amount and length substantially correspond to the inside of the box B set in advance, and the extruded portion in the longitudinal direction. And keep it loose (or gathered together).

Next, the bag separating mechanism 30 is driven to heat-seal the original film f in the width direction by the heating head 35,
The upper part of the original film f adjacent to the heat-sealed part is cut in the width direction by the cutting blade 34 to be separated into one bag F.

At the same time, as shown in FIGS. 6 and 7, the peripheral edge portion of the original film f opened by the opening unit 41 of the bag opening mechanism 40 is held by the covering chuck 51 of the bag covering mechanism 50. After that, 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, and the flap Ba of the box body B is opened to a size to be covered and the opening unit is opened. 41 ... is displaced inward. Hereinafter, in the same manner as described above, the opening unit 41 of the bag opening mechanism 40 is rotated up and down to continuously perform the opening operation of the film original fabric f and the bag body F.

Next, the air C discharged from the spray nozzles 44 ... Is sprayed onto the upper surface side (the loosened portion) of the bag body F held by the covering unit 51. The inside and outside of the box B is inserted in the direction (downward or hanging state), and the cover unit 51 ... While removing the air remaining between the facing surfaces of the bag body F and the box body B, the mouth portion Fa of the bag body F is closed by the box body B.
The flaps Ba ... are covered in a state of being folded back to the outside and laid along the inner wall and corners of the box B (see FIG. 8). After that, the sandwiching by the covering units 51 ... Is released.

Next, the covering units 51 ... Are lowered below the mouth Fa of the bag F covered by the flaps Ba of the box B to be retracted to the outside, and then the covering units 51 ... To open the bag opening mechanism 40 of the opening unit 4
The next bag body F which has been opened and held by 1 ... is held and opened.
Hereinafter, in the same manner as described above, the covering units 51 of the bag covering mechanism 50 are moved up and down to continue the covering work and the laying work of the bag body F.

As described above, since the bag body F is held with a slack in the length direction, and the box body B having the entire upper surface opened is conveyed to the lower part of the bag body F, Since it is not necessary to raise the box body B side or lower the bag body F side, the relative movement distance between the bag body F and the box body B becomes short, so that when one bag body F is laid The time required can be greatly shortened, and the laying capacity can be improved and the speed can be increased.

Moreover, since the inner facing surface of the bag body F is separated and peeled by the separation unit 28 and preliminarily opened, an opening mistake by the bag opening mechanism 40 and the bag covering mechanism 50 does not occur, and the opening work of the bag body F is performed. Further, the laying work can be performed accurately and surely, and the bag laying apparatus 10 is highly reliable. Moreover, the end portion of the previous film raw fabric f can be inserted into the start end portion of the next film raw fabric f and can be easily connected to each other by adhesive fixing or adhesive fixing with an adhesive tape. The anti-f can be continuously supplied.

Furthermore, since the bags F are held together in the longitudinal direction, it is not necessary to variably adjust the relative distance between the bags F and the box B, and the size of the bag F can be The size can be set substantially corresponding to the size of the inside of the box B having various sizes.

In the correspondence between the structure of the present invention and the above-described embodiment, the packaging body of the present invention is a bag body F made of synthetic resin or paper of the embodiment or a bag body composed of a composite of synthetic resin and paper. Similarly, the container corresponds to a box B made of corrugated cardboard or cardboard, a container made of plastic, metal, or wood, and the bag separating means is a bag separating mechanism 20 and a cutting blade 34.
The bag opening means corresponds to the heating head 35, a cutting tool (cutter or scissors), and the bag opening mechanism is the bag opening mechanism 40 and the opening unit 4.
1, the bag inserting means corresponds to the injection nozzle 44 and the air C, the bag covering means corresponds to the bag covering mechanism 50 and the covering unit 51, and the package peeling means corresponds to the separating unit 28 and the separating roll 27. , A rotating body (ball), a member having a small contact resistance, and the like, and the container carrying means corresponds to carrying means such as a carrying conveyor 60 (chain conveyor), a belt conveyor, and a roller conveyor. It is not limited to the configuration of the embodiment.

The bag opening mechanism 40 and the bag covering mechanism 50 described above.
As another example of the opening means instead of, for example, the raw film f and the peripheral edge of the bag F on the opening side are adsorbed and held by an adsorber connected to a negative pressure generator to be opened, or sandwiched by a pair of arms. It can also be opened.

[Brief description of 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 a box body by a transport conveyor.

FIG. 3 is an enlarged front view showing the peeling operation of the bag body by the separation unit.

FIG. 4 is a plan view showing a peeling operation of the bag body by the separation unit.

FIG. 5 is a front view showing the separating operation of the bag separating mechanism and the opening operation of the bag opening 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 the bag opening mechanism and the bag covering mechanism.

FIG. 8 is a perspective view showing a state in which the bag body is laid inside the box body.

[Explanation of symbols]

f ... Original film F ... Bag Fa ... mouth B ... Box Ba ... flap C ... air 10 ... Bag laying device 20 ... Supply mechanism 26 ... Feed roll 27 ... Separation roll 28 ... Separation unit 30 ... Bag separation mechanism 34 ... Cutting blade 35 ... Heating head 40 ... Bag opening mechanism 41 ... Opening unit 41a ... Chuck 44 ... Injection nozzle 50 ... Bag coating mechanism 51 ... Covering unit 51a, 51b ... Chuck 60 ... Conveyor

Claims (4)

[Claims] 1. A bag laying apparatus for covering the mouth of a bag with a peripheral edge of an opening of the container, and laying the bottom of the bag inside a container having an entire upper surface opened. Bag opening means for opening the mouth portion of the bag body formed to have a substantially corresponding size and for holding the bag body in a gathered state in the length direction,
A bag inserting means for inserting the gathered portion of the bag body held by the bag opening means toward the inside of the container supplied to the lower part of the bag body, and a mouth portion of the bag body opened by the bag opening means. A bag laying device, which holds and covers the peripheral edge of the container on the opening side. 2. A bag body to be supplied to the bag opening means is provided in front of the bag opening means, and a substantially tubular packaging body continuous in the length direction is made to have a size substantially corresponding to the inside of the container. The bag laying apparatus according to claim 1, further comprising a bag separating unit that is formed separately. 3. A package peeling device, which is inserted and held in the width direction inside the package body in the preceding stage of the bag separating means, and applies a biasing force in a direction in which the inner facing surface of the package body is peeled off. The bag laying apparatus according to claim 2, further comprising means. 4. The bag laying device according to claim 1, further comprising a container carrying means for carrying the container to the lower part of the bag body which is opened and held by the bag opening means.