JP2001097317A - Bag body supplying apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bag body supplying apparatus which automatically opens a sheet-like bag body without depending on a manual work. SOLUTION: A bag body supplying apparatus comprises a housing device 3 which houses piled up bag bodies 8 each to be opened, at its one end, feeding devices 9, 10, 11 which feed the sheet-like bag bodies 8 piled up and housed in the housing device 3 piece by piece, starting from the uppermost layer of piling, and opening devices 18, 24, 25 which draw in the opposite directions both sides at one end of the sheet-like bag body 8 fed by the feeding devices.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bag supplying apparatus for supplying a bag such as a polybag, and more particularly, to feeding a sheet-like bag to a predetermined position, and opening one side of the bag by an opening means. The present invention relates to a bag supply device in which both sides are pulled in opposite directions to open.

[0002]

2. Description of the Related Art Generally, a bag having an opening on one side, for example, a polybag, is stored and stored in a sheet shape.
FIG. 6 is a diagram illustrating filling of small articles or the like by manual operation using such a sheet-shaped polybag. FIG.
As shown in (a), sheet-like polybags 36 are stacked and stored in a container 37. First, as shown in FIG. 6B, the worker takes out one polybag 36 from the container 37. Next, as shown in FIG. 6C, the worker grasps the polybag 36 with both hands and
6a is opened. Then, as shown in FIG.
An operator puts and fills small articles and the like into the opening 36a of the polybag 36.

[0003]

By the way, in the above-described manual opening operation of the polybag and the filling operation of the small articles, since the polybag 36 is a thin sheet made of synthetic resin, the opening 36a is opened. It was quite troublesome.
That is, since the polybag is a thin sheet made of a synthetic resin, when the sheets are stacked in a sheet shape, there is no air inside the sheet-shaped polybag, and the thin sheets of the polybag adhere to each other due to the action of static electricity. State. Opening the closely adhered polybag by hand requires unraveling the polybag with both hands, which is very troublesome and time-consuming.

Accordingly, the present invention provides a bag supply apparatus in which a sheet-like bag is opened by pulling opposite sides of one side of the bag rather than opening the bag manually. The purpose is to do so.

[0005]

According to the present invention, there is provided a bag supply apparatus comprising: a storage means for stacking and storing sheet-like bags each having an opening on one side; and a sheet-like form stacked and stored in the storage means. And an opening means for pulling open both sides of one side of the sheet-like bag sent out by the sending means in opposite directions to each other. It is a feature.

In the bag supply apparatus according to the present invention, the delivery means is driven to deliver the uppermost sheet-shaped bag, and the opening-side means reverses one side of the delivered sheet-shaped bag. Since the opening is pulled in the direction, air enters at least the inside of the opening side, and the bag body can be easily expanded. Therefore, a time-consuming manual opening operation of the bag body can be omitted.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a bag supply apparatus according to the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an example of a polybag supply device to which a bag supply device according to the present invention is applied. The polybag supply device 1 has a base 2, on which a tray 3 as storage means for stacking and storing sheet-like polybags (polybag sheets) 8 is installed. Tray 3
It consists of a left side plate 4, a rear side plate 5, a right side plate 6, and a bottom plate 7, and the front surface is opened. Further, the bottom plate 7 of the tray 3 is formed to be inclined obliquely upward from the rear to the front.

According to the present invention, the sheet-like polybags 8 stacked and stored in the tray 3 are sent out one by one from the uppermost layer by the sending-out means, and both sides of one side of the polybags 8 sent out by the opening means are placed. The openings are pulled in opposite directions to each other so that manual openings are omitted.

The left and right side plates 4 and 6 of the tray 3 are provided with arc-shaped long holes 4a and 6a, respectively, and a shaft 9 is inserted through the pair of long holes 4a and 6a. That is, the shaft 9 is configured to be movable along the elongated holes 4a and 6a. A pair of pinch rollers 10 for feeding out the sheet-like polybag 8 are fixed to the shaft 9 at a predetermined interval. The shaft of a motor 11 with a speed reducer is connected to one end of the shaft 9. Retaining washers 12 are respectively fitted to the outer portions of the elongated holes 4a and 6a of the tray 3 of the shaft 9, and the tip portions of the holding levers 13 respectively contact the outer portions of the shaft 9 outside the pair of retaining washers 12. In contact. A hole is formed in the base end of the holding lever 13, and through the hole, the base end of the holding bar 13 is connected to a pin 14 having a head mounted on the base 2.
It is supported movably. A coil spring 1 is provided between the head of the headed pin 14 and the base end of the holding lever 13.
5 is contracted. The shaft 9, the pair of pinch rollers 10, the motor 11, and the pair of pressing levers 13 constitute a feeding unit.

When the sheet-like polybags 8 are stacked and stored at the rear portion of the tray 3, a pair of pinch rollers 10
3 is pressed by the elastic force of the coil spring 15 and the weight of the shaft 9. In this state, when the motor 11 is driven and the shaft 9 is rotated,
The pair of pinch rollers 10 rotate so that the uppermost polybag 8 is fed forward.

FIG. 2 shows a polybag. The polybag 8 is formed of a thin sheet made of polyethylene, and has an opening 8a, a side surface 8b, and a bottom 8c which is heat-sealed and sealed. A small article is put into the polybag 8 through the opening 8a, and is filled in the polybag 8. When the polybags 8 are stacked in a sheet shape, the air inside is pushed out, the side portions 8b are in close contact, and the openings 8a are closed. At this time, since the polybag 8 is a thin sheet made of a synthetic resin and is tightly adhered to without any gap due to the action of static electricity, the opening 8a is completely closed. For this reason, opening the opening 8a of the polybag 8 by hand is a laborious and time-consuming operation because it is necessary to loosen the sheet-like polybag 8 with both hands.

As shown in FIG. 1, a substantially semicircular notch 7a is provided at the front end of the bottom plate 7 of the tray 3. Bottom plate 7
A bottom plate 17 is applied to the notch 7a from below, and a suction pad 18 as a suction member for sucking a sheet on the lower side of the polybag 8 is provided upright on the bottom plate 17.

At the front end of the left and right side plates 4 and 6 of the tray 3, there is provided a transmitted light detection type optical sensor 20 for detecting that the polybag 8 has been taken out by an operator.
That is, a light projecting portion 20A of the transmitted light detection type optical sensor 20 is provided at the front end of the left side plate 4, and a light receiving portion 20B of the transmitted light detection type optical sensor 20 is provided at the front end of the right side plate 6. ing. Projection unit 20A of transmitted light detection type optical sensor 20
The light projected from the light receiving unit 20B is received by the light receiving unit 20B, but the light projected from the light projecting unit 20A is blocked by hand by the worker taking out the polybag 8, so that the amount of light received by the light receiving unit 20B Is extremely small, so that it is detected that the worker has taken out the polybag 8.

Above the suction pad 18, an electromagnetic cylinder 24 as a moving means is fixed via a stay 23 fixedly provided on the left side plate 4 with a cylinder rod 24a directed downward. The suction pad 1 is provided at the tip of the cylinder rod 24a.
A suction pad 25 is attached to the suction pad 18 and is a suction member that contacts the suction pad 18. A control box 27 is provided below and in front of the tray 3, and a power switch 28, a start button 29 for starting the supply of the polybag 8, and a stop button 30 for stopping the supply of the polybag 8 are provided in front of the control box 27. Etc. are provided. The suction pads 18 and 25, the cylinder rod 24a, and the electromagnetic cylinder 24 constitute an opening means.

FIG. 3 is a schematic block diagram of a polybag supply device according to the present invention. The control box 27 is provided with a CPU 32 as a control means.
2, the operation unit 33, the motor 11, the transmitted light detection type optical sensor 20, the electromagnetic cylinder 24, and the like are connected.
The operation unit 33 includes a power switch 28, a start button 29, a stop button 30, and the like.

When the start button 29 of the operation unit 33 is pressed, the motor 11 is driven for a predetermined time to rotate the shaft 9 and the pinch roller 10, and the uppermost polybag 8 is fed forward. Then, after the motor 11 is driven for a predetermined time and the polybag 8 is fed forward, the CPU 32 operates the electromagnetic cylinder 24 to advance the cylinder rod 24a downward, and the suction pad 25 and the suction pad 18 The polybag 8 is pressed and clamped from above and below, and then the cylinder rod 2
4a is raised to open the opening 8a of the polybag 8. When the worker takes out the opened polybag 8,
The movement of the hand is detected by the transmitted light detection type optical sensor 20, and C
The PU 32 starts the next polybag supply cycle and controls the motor 11 to drive for a predetermined time.

Next, an operation example of the polybag supply device according to the present invention will be described. FIG. 4 is a flowchart illustrating an operation example of the polybag supply device according to the present embodiment. First, in step 101, the CPU 32 determines whether the start button 29 has been pressed. If the start button 29 is pressed, the motor 11 is driven for a predetermined time in step 102, and the uppermost polybag 8 is fed forward. Then, in step 103, the electromagnetic cylinder 24 is operated, the cylinder rod 24a is advanced downward, and the sheet-shaped polybag 8 is held between the suction pad 25 at the tip and the suction pad 18 on the tray side. At this time, since the suction pad 25 and the suction pad 18 are pressed against each other with the polybag 8 interposed therebetween, the suction pads 25 and 18 are compressed and the suction pad 2 is pressed.
The air in 5 and 18 is discharged, and a suction force is generated.

In step 104, when the electromagnetic cylinder 24 is operated to move the cylinder rod 24a and the suction pad 25 at the tip thereof upward, the suction pads 25, 18
The side portion 8b of the polybag 8 is pulled up and down by the suction force of the above, and the opening 8a is opened. FIG. 5 shows the suction pad 25.
Is a diagram showing a state in which the opening 8a is opened by the upward movement of the side surface portion 8b of the polybag 8 by the suction force of the suction pads 25 and 18 being pulled up and down. As shown in FIG. 5, in a state where the opening 8a of the polybag 8 is open, the worker can easily put and fill the articles through the opening 8a of the polybag 8.

In step 105, the worker takes out the opened polybag 8 and determines whether the optical sensor 20 is on. If the optical sensor 20 is on, the process proceeds to step 102 and the motor 11 Is driven for a predetermined time, and the uppermost polybag 8 is fed forward. On the other hand, if the optical sensor 20 is not turned on in step 105, the worker has not yet taken out the opened polybag 8, so that
In step 106, it is determined whether the stop button 30 has been pressed. If the stop button 30 is pressed in step 106, the operation of supplying the polybag is stopped. If the stop button 30 is not pressed, the process proceeds to step 105 and the optical sensor 20
Is repeatedly turned on. After the worker takes out the opened polybag 8, the article (not shown) is filled.

Therefore, by driving the motor 11 for a predetermined time,
The sheet-shaped polybags 8 stacked and stored in the tray 3 can be fed out one by one, and the fed-out polybags 8 are automatically opened and closed by a pair of upper and lower suction pads 25 and 18 and an electromagnetic cylinder 24 serving as opening means. Since the opening can be performed in a special manner, it is possible to omit the conventional laborious and time-consuming manual opening work.

When the optical sensor 20 detects that the opened polybag 8 has been taken out, the CPU 32 drives the motor 11 for a predetermined time on the basis of the detection signal and sends out the next polybag 8, so that each time the polybag 8 is sent out. There is no need to perform an operation to send out the bag 8, which is extremely simple. In the above-described embodiment, the bag body of the bag body supply device is a polybag. However, the bag body is not limited thereto, and may be another synthetic resin bag such as a vinyl bag, or another bag such as a paper bag. It goes without saying that a bag made of a material may be used.

Although the electromagnetic cylinder is used as the moving means of the suction member, it is needless to say that other moving means such as an air cylinder, a hydraulic cylinder, an electric cylinder, and a motor may be used. The shaft of the motor 11 with a speed reducer is directly connected to one end of the shaft 9. However, the present invention is not limited to this, and a transmission member is interposed between the shaft 9 and the motor 11 with a speed reducer. Is also good. The suction member may be a suction pad that forcibly sucks in air,
When a suction pad is used, the bag can be opened more reliably. The transmitted light detection type optical sensor 20 is used to detect that the polybag 8 has been taken out. However, the present invention is not limited to this. For example, a reflected light detection type optical sensor or a mechanical sensor that detects pressing by hand is used. Of course, other sensors may be used.

[0023]

As described above, according to the present invention,
Since there is provided an opening means for opening the sheet-shaped bag sent out to a predetermined position, both sides of one side of the sheet-shaped bag can be pulled in opposite directions to each other, and the conventional bag can be opened. Such manual opening work can be omitted, and the opening time can be greatly reduced.
Further, when a sensor for detecting that the opened bag is taken out is provided, the control means controls the delivery means to be driven based on the detection signal from this sensor, so that the worker can After taking out the bags, there is no need to operate to send out the bags one by one, which is extremely simple.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a polybag supply device to which a bag supply device according to the present invention is applied.

FIG. 2 is a view showing a polybag.

FIG. 3 is a schematic block diagram of a polybag supply device according to the present invention.

FIG. 4 is a flowchart showing an operation example of the polybag supply device according to the present invention.

FIG. 5 is a view showing a state in which a side portion of the polybag is pulled up and down by a suction force of a suction pad and an opening is opened.

FIG. 6 is a diagram illustrating filling of small articles or the like by manual operation using a sheet-shaped polybag.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Polybag supply apparatus (bag supply apparatus) 2 Base 3 Tray (storage means) 8 Polybag (bag body) 9 Shaft 10 Pinch roller 11 Motor with reduction gear 13 Holding lever 14 Pin with head 15 Coil spring 18 Suction pad (Suction member) 20 Optical sensor (sensor) of transmitted light detection type 24 Electromagnetic cylinder 24a Cylinder rod 25 Suction pad (suction member) 27 Control box 32 CPU (control means)

Claims (5)

[Claims] 1. A storage means for stacking and storing sheet-like bags having an opening on one side, and a sending-out means for feeding sheet-like bags stacked and stored in the storage means one by one from an uppermost layer. An opening means for pulling open both sides of one side of the sheet-like bag sent out by the sending-out means in opposite directions to each other. A sensor for detecting that the bag opened by the opening means is taken out, and a control means for controlling the sending means to be driven based on a detection signal from the sensor. The bag supply apparatus according to claim 1, wherein 3. The opening means moves a pair of suction members for sandwiching the sheet-like bag, and at least one of the suction members in a direction intersecting the conveying direction of the sheet-like bag. The bag supply device according to claim 1, comprising a moving unit. 4. The bag supply apparatus according to claim 3, wherein the suction member is an air suction pad. 5. The bag supplying apparatus according to claim 3, wherein said moving means is an electric cylinder.