JPH11245919A - Bag opener - Google Patents

Abstract

PROBLEM TO BE SOLVED: To open the unsealed edge of a bag nicely regardless of the size or the shape of the bag. SOLUTION: This is standing pouch input equipment 10 for opening the unsealed edge 2 of a standing pouch 1, and is provided with positioning equipment 15 having a positioning jig 43 for positioning a standing pouch by positioning a recessed part on the unsealed edge side of the standing pouch by a stopper pin, a temporary opener 16 for opening the unsealed edge by adsorbing the neighborhood of the unsealed edge of the standing pouch wall with a tentative opening pad 58 and an actual opening pad 64, actual opening, inflating, inputting equipment 17, and third transfer equipment 13 for transferring the standing pouch positioned by the positioning equipment to the tentative opening equipment, actual opening equipment and to the inputting equipment one after another.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a bag opening device for opening an unsealed edge of a bag such as a standing pouch (self-supporting bag).

[0002]

2. Description of the Related Art A standing pouch is put into a transfer holder, and while the standing pouch is transferred using the holder, the contents are filled in the standing pouch. Thereafter, an unsealed edge of the standing pouch is sealed. Japanese Patent Laid-Open No. 59-624
No. 21 is published.

According to this invention, after the standing pouch is put into the transfer holder, a nozzle is inserted into the unsealed edge of the standing pouch during the transfer, and air is discharged from the nozzle to remove the unsealed edge of the standing pouch. It is open.

[0004]

Since the standing pouch is wider when the unsealed edge is closed than when it is opened, the width of the transfer holder into which the standing pouch is put is wider in the above prior art. It becomes large.

In the above publication, the standing pouch is described as being opened by discharging air from a nozzle inserted into the unsealed edge, but the opening for inserting the nozzle is not particularly provided. However, the insertion of the nozzle was uncertain, and the height of the nozzle had to be changed according to the height of the standing pouch.

The present invention has been made in view of the above circumstances, and provides a bag opening apparatus capable of satisfactorily opening an unsealed edge of bags with different sizes and shapes.

[0007]

SUMMARY OF THE INVENTION According to the present invention, there is provided a positioning means for positioning an unsealed edge of a bag by positioning the unsealed edge of the bag, and suctioning a portion of the wall of the bag near the unsealed edge with a suction member. And an opening means for opening the unsealed edge of the bag. It is preferable that a stopper member is provided on the unsealed edge side of the bag as the positioning means, and the bag is positioned by bringing the unsealed edge of the bag into contact with the stopper member.

[0008] In particular, the bag is placed with the unsealed edge down.
It is preferable that the stopper member is disposed below the stopper member so as to contact the stopper member by its own weight. Also,
The opening means preferably opens the unsealed edge after the temporary opening of the unsealed edge of the bag.

Further, the bag with the unsealed edge opened by the opening means is guided to the charging means, and the charging means inputs the inflated bag with the unsealed edge opened and into the transfer holder. It is preferred that

[0010] With the above-described configuration, it is not necessary to change the opening means for various kinds of bags having different sizes and shapes, and the unsealed edge can be opened well.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIGS. 1 and 3, a standing pouch input device 10 functioning as a bag opening device.
Is a first transfer device 11, a second transfer device 12, a cutting device 1
4. Positioning device 15 as positioning means, third transfer device 13 as transfer means, temporary opening device 16 as opening means, and main opening / loading device 17 as opening means, inflating means and charging means. One unit is configured. Each unit opens a standing pouch (self-supporting bag) 1 as a bag, an unsealed edge 2 thereof,
It is expanded and thrown into the transfer holder 8.

As shown in FIG. 2, a number of units of the standing pouch loading device 10 are arranged in parallel, and the standing pouch 1 loaded into the transport holder 8 is transported by a transport device 20 configured to circulate. In the meantime, the content is filled from the opened unsealed edge 2 by the filling machine 21, the unsealed edge 2 is sealed by the sealing machine 22, and the defective product discharging device 23 has a poor filling or poor sealing. Are ejected from the transfer holder 8 by the standing pouch extractor 24. The empty transfer holder 8 is transferred by the transfer device 20 to the standing pouch input device 10 and is used again. The standing pouches 1 extracted from the transfer holder 8 by the standing pouch extracting machine 24 are collectively stored in a tray 27 assembled by a tray assembling machine 26 by a case stuffing machine 25. The tray 27 in which the standing pouch is stored is covered with a cover 29 by a cover covering machine 28 and is carried out.

As shown in FIG. 7, the standing pouch 1 has two side walls 3 adhered to both side edges, and a bottom 4 on one side (the lower side in FIG. 7) of these two wall sections 3. A storage space 5 capable of storing the contents is formed by being bonded, and an unsealed edge 2 for filling the storage space 5 with the contents is formed on the other side (upper side in FIG. 7) of the two wall portions 3. It was done. Further, in this standing pouch 1, both wall portions 3
, A straw portion 6 is formed on the side of the unsealed edge 2 to communicate with the storage space 5 and take out the contents.
A recess 7 is formed between the straw part 6 and the straw part 6.

On the other hand, the transfer holder 8 is formed in a cylindrical shape with a bottom, and stores the standing pouch 1 inserted from the opening 8A in the storage chamber 8B. Width W of transfer holder 8
_B is unsealed edges 2 are opened, is set corresponding to the inflated width W _A of the standing pouch 1. Conveying holder 8, the feeder 20 is conveyed to the width W _B direction.

As shown in FIGS. 1 and 3, the first transfer device 11 has a belt 31 wound around a plurality of pulleys 30. On the belt 31 driven by the motor 32,
A number of standing pouches 1 with unsealed edges 2 closed are stacked and placed. Sensor 3 arranged on the unloading side
3 is for detecting the standing pouch 1.

The cutting device 14 includes a slide member 34 that moves in the transfer direction of the first transfer device 11 and the second transfer device 12.
And a cylinder device 35 provided on the slide member 34 and having a suction pad 36. The above sensor 33
Is placed on the unloading side of the first transfer device 11
Is detected, the cylinder device 35 is extended, and one standing pouch 1 is sucked by the suction pad 36,
Next, the cylinder device 35 is contracted,
Is moved to the second transfer device 12 side, and thereafter, the cylinder device 35 is extended, the suction of the standing pouch 1 by the suction pad 36 is released, and the standing pouch 1 is placed on the second transfer device 12.

The second transfer device 12 has two pairs of pulleys 3
Two belts 39A and 39B having a feed claw 40 projecting outward at a predetermined interval between 7 and 38 are arranged and wound around.

The pulley 37 is connected to a second
It is connected to the index unit 42 and is driven intermittently. The feed pawls 40 of the belts 39A and 39B are used to position the cut-out standing pouches 1 one by one.
5 is transferred into the positioning jig 43.

The positioning device 15 is supported by the frame 10A together with the first transfer device 11, the second transfer device 12, and the cutting device 14 described above.

The support base 44 is connected to a cylinder device (not shown) via a rack and pinion mechanism (not shown), and the positioning jig 43 together with the fixed positioning jig 43 rotates about 90 degrees around the rotation shaft 45.
Swings in a range of degrees.

In the positioning jig 43 shown in FIGS. 4 to 6, side portions 47 each having a substantially U-shaped cross section are disposed on both side edges of a bottom surface 46 having an E-shape in plan view with their opening sides facing each other. 4 and FIG.
As shown by the two-dot chain line, the flat sealing pouch 1 in which the unsealed edge 2 is closed is housed.

On the bottom surface 46, a stopper pin 48 (stopper member) is implanted. The standing pouch 1 housed in the positioning jig 43 stands with the unsealed edge 2 downward when the positioning jig 43 stands upright, and the depression 7 abuts against the stopper pin 48 by its own weight, and the positioning jig 4
3 is positioned.

Notch 5 formed in E-shaped bottom surface 46
The feeding claw 40 of the second transfer device 12 moves in the inside 0 for the purpose of carrying the standing pouch 1 into the positioning jig 43. A guide 51 is provided at a position facing the notch 50 on the bottom surface 46.
Is bent and inclined toward the back side of the bottom surface 46. The guide 52 was also formed at the loading-side end of the bottom surface 46 by bending it toward the rear surface of the bottom surface 46. Guides 51 and 52 are
The standing pouch 1 transferred from the second transfer device 12 is prevented from being caught on the positioning jig 43.

As shown in FIG. 5, the upright portions 53 on both sides 47 of the positioning jig 43
The standing pouch 1 is configured to expand outward so as to be smoothly carried into the positioning jig 43.

As shown in FIGS. 1 and 3, the third transfer device 13 includes a rotating body 54, four pairs of transfer pads 55A,
5B, 55C, 55D, first index unit 81
And the standing pouch 1 positioned by the positioning jig 15 are sequentially transferred to the temporary opening device 16 and the main opening / loading device 17.

The first index unit 81 and the motor 82 are supported by the frame 10B, and the rotating body 54 is connected to the first index unit 81. The driving force of the motor 82 is transmitted to the first index unit 81 via pulleys 83A and 83B and a belt 84, intermittently rotates the rotating body 54 in the direction of arrow R at an angle of 90 degrees, and pulleys 85A and 85B and a belt. The signal is transmitted to the second index unit 42 via 86, and the second index unit 42 is operated in synchronization with the first index unit 81.

Four pairs of transfer pads 55A, 55B, 55 provided with a suction cup 57 on the piston rod of the cylinder device 56
C and 55D are installed at four equally spaced positions in the circumferential direction of the rotating body 54, and the intermittent rotation of the rotating body 54 causes the positioning station A in which the positioning device 15 is arranged and the temporary opening station B in which the temporary opening apparatus 16 is arranged. , Book opening, inflating,
The charging device 17 is sequentially positioned at each position of the main opening / inflation / loading station C where the charging device 17 is disposed and the idle station D where nothing is disposed.

At the positioning station A, the transfer pad 55 extends the cylinder device 56, and the suction pad 57 causes the wall 3 of the standing pouch 1 in the positioning jig 43 to move.
Then, the cylinder device 56 is contracted, and the stuck pouch 1 is pulled out from the positioning jig 43. At this time, one of the transfer pads 55 on the rear side in the rotation direction R by the rotating body 54 adsorbs the vicinity of the unsealed edge 2 in the wall 3 of the standing pouch 1 as shown in FIG. The vicinity of the bottom 4 in the wall 3 is adsorbed.

The transfer pad 55 transfers the standing pouch 1 pulled out at the positioning station A to the temporary opening station B and the main opening / inflation / injection station C by intermittent rotation of the rotary table 54.
The idle station D is in a standby state in which the standing pouch 1 is not sucked.

The temporary opening device 16 includes a temporary opening pad 58 as a suction member supported by the frame 10B and a sub-nozzle portion 59. The suction pad 60 is attached to the piston rod of the cylinder device 58A in the temporary opening pad 58. Is provided. The suction cup 60 is disposed opposite to one of the pair of transfer pads 55A, 55B, 55C or 55D positioned at the temporary opening station B on the rear side in the rotation direction R by the rotating body 54, and the wall of the standing pouch 1 is formed. The vicinity of the unsealed edge 2 in the portion 3 is sucked.

When the standing pouch 1 is positioned at the temporary opening station B by the third transfer device 13, the cylinder device 58A of the temporary opening pad 58 is extended and the suction cup 60 is moved.
Then, the standing pouch 1 is sucked, and then the cylinder device 58A contracts to open the unsealed edge 2 of the standing pouch 1, and air is blown into the standing pouch 1 through the unsealed edge 2 from the sub nozzle portion 59. To temporarily open the unsealed edge 2 of the standing pouch 1,
Thereafter, the suction of the standing pouch 1 by the suction cup 60 is released.

The opening / inflation / injection device 17 is provided with a third
The unsealed edge 2 of the standing pouch 1 positioned at the main opening / inflation / injection station C by the transfer pad 55 of the transfer device 13 is fully opened, and is put into the transfer holder 8 on the transfer device 20. Main nozzle portion 62 supported by frame 10B via 61
A main opening pad 64 as a pair of suction members, which is provided with a suction cup 63 on the piston rod of the cylinder device 64A and is supported by the frame 10B at a predetermined distance in the vertical direction;
It has a guide member 65 and a second guide member 66.

In the elevating mechanism 61, a slider 68 fixed to a belt 70 driven by a motor 69 is slidably fitted on a guide rail 67 supported by the frame 10B along the vertical direction. Ascend and descend along.

A main nozzle portion 62 from which air is discharged from the front end portion is fixed to a slider 68 of the lifting / lowering mechanism 61 via a connecting bar 71, and is formed in a triangular shape in a front view. Is provided so as to be able to be inserted into the unsealed edge 2.

The pair of main opening pads 64 are arranged opposite to the pair of transfer pads 55 located at the main opening / inflation / injection station C in the third transfer device 13, and the suction cup 63 of the upper main opening pad 64 is arranged. However, the suction near the unsealed edge 2 in the wall 3 of the standing pouch 1 and the suction cup 63 of the lower main opening pad 64 suction near the bottom 4 in the wall 3 of the standing pouch 1.

The first guide member 65 is formed in a substantially cylindrical shape having a U-shaped cross section, and the third transfer device 13 is supported by the frame 10B with an opening on the rotating body 54 side. Third transfer device 1
When the transfer pad 55 of No. 3 is located at the main opening / inflation / injection station C, the cylinder device 56 is extended, and the standing pouch 1 adsorbed by the suction cup 57 is accommodated in the first guide member 65. An opening (not shown) is formed on the back surface of the first guide member 65 so that the suction cup 63 of the lower main opening pad 64 can be inserted therethrough.

The second guide member 66 has a pair of guide pieces 72 having a U-shaped cross section arranged facing each other on the opening side, and each guide piece 72 is supported by the frame 10B by the cylinder device 73. . When the standing pouch 1 is loaded, the pair of guide pieces 72 are joined by the extension operation of the cylinder device 73, so that the second guide member 66 becomes cylindrical.

The main opening / inflation / injection device 17 described above operates as follows. Transfer pad 5 of third transfer device 13
5 is positioned at the main opening / inflation / injection station C and extends, and the standing pouch 1 accommodates the inside of the first guide member 65. Next, the pair of full opening pads 64 extend to the first guide member 65, and the wall 3 of the standing pouch 1 is sucked by the suction cup 63, and then contracted to open the unsealed edge 2 of the standing pouch 1. I do. Thereafter, the lifting / lowering device 61 is operated to lower the main nozzle portion 62, and the main nozzle portion 62 is inserted into the unsealed edge 2 of the standing pouch 1 sucked by the transfer pad 55 and the main opening pad 64, and temporarily After stopping, the air is discharged from the main nozzle portion 62 into the storage space 5 of the standing pouch 1, and the standing pouch 1 expands, and the unsealed edge 2 of the standing pouch 1 is fully opened and expanded.

Next, the suction of the standing pouch 1 by the suction cup 57 of the transfer pad 55 is released, and the transfer pad 55 contracts. Thereafter, the suction cup 63 of the main opening pad 64 releases the suction of the standing pouch 1 and contracts, and at the same time, the discharge of air from the main nozzle portion 62 is stopped.

In this state, the main nozzle portion 62 is inserted into the unsealed edge 2 of the expanded pouch 1, and the elevating device 61 is operated to further lower the main nozzle portion 62, and the expanded pouch 1 is removed. Guided by the first guide member 65 and the second guide member 66,
It is stored in the transfer holder 8 on the transfer device 20. Thereafter, air is discharged from the main nozzle portion 62 to separate the main nozzle portion 62 from the standing pouch 1, and the main nozzle portion 62 is raised by the operation of the elevating device 61, so that the unsealed edge 2 is opened. Then, the loading of the standing pouch 1 into the transport holder 8 is completed.

Here, reference numeral 74 in FIG.
And a guide bar for guiding the transfer holder 8 placed on the transfer belt 75 and transferred along both sides of the transfer holder 8 along the transfer direction.

The operation of one unit of the standing pouch input device 10 is as follows. When the standing pouch 1 on the first transfer device 11 is conveyed to the unloading side and detected by the sensor 33, the motor 3
2 stops, the transfer of the first transfer device 11 is stopped, and at the same time, the cutting device 14 is operated, and one standing pouch 1 is cut out to the second transfer device 12.

The second transfer device 12 includes a third transfer device 13
Operates in synchronization with the rotating body 54, and transfers the standing pouch 1 cut out by the cutting-out device 14 into the horizontal positioning jig 43 in the positioning device 15 during the 90-degree intermittent rotation of the rotating body 54. .

The positioning device 15 includes the third transfer device 13
At approximately the same time as the intermittent rotation of the rotating body 54 is stopped, the positioning jig 43 is rotated 90 degrees to be in an upright state, and the dent 7 is brought into contact with the stopper pin 48 of the positioning jig 43 by the weight of the standing pouch 1. Position the pouch 1.

While the intermittent rotation of the rotating body 54 is stopped, the third transfer device 13 extends the transfer pad (for example, 55A) positioned at the positioning station A to suck the standing pouch 1 in the positioning jig 43. Then, the standing pouch 1 is retracted and pulled out. Thereafter, the positioning device 15 is moved to the positioning jig 43.
Is turned 90 degrees to return to the horizontal state.

Thereafter, the rotating body 54 of the third transfer device 13
Is further intermittently rotated 90 degrees and stopped, and the transfer pad 55A that has absorbed the standing pouch 1 is moved to the temporary opening station B.
, The temporary opening pad 5 of the temporary opening device 16
8 expands and adsorbs the vicinity of the unsealed edge 2 on the wall 3 of the standing pouch 1, and then contracts to open the unsealed edge 2 of the standing pouch 1, and the sub-nozzle portion 59 is opened almost simultaneously. Standing pouch 1
Is blown into the unsealed edge 2 (temporary opening). The temporary opening pad 58 then releases the suction of the standing pouch 1, and the sub nozzle 59 also stops blowing air.

Thereafter, the rotating body 54 of the third transfer device 13
Is further intermittently rotated by 90 degrees and stopped, and the transfer pad 5 on which the standing pouch 1 with the unsealed edge 2 temporarily opened is sucked.
When the transfer pad 55A is positioned at the main opening / inflation / injection station C, the transfer pad 55A is extended, and then the main opening pad 6A of the main opening / inflation / injection device 17 is moved.
4 extends and adsorbs near the unsealed edge 2 on the wall 3 of the standing pouch 1 and then contracts to open the unsealed edge 2 of the standing pouch 1. Thereafter, the main nozzle portion 62 descends and is inserted into the unsealed edge 2 of the standing pouch 1, and air is blown from the main nozzle portion 62 into the storage space 5 of the standing pouch 1, and the unsealed edge of the standing pouch 1 is 2 is fully opened.

Subsequently, the transfer pad 55A releases the suction of the standing pouch 1 and contracts.
The main opening pad 64 of the inflation / injection device 17 releases the suction of the standing pouch 1, and at the same time, stops blowing air from the main nozzle portion 62. At this time, the standing pouch 1 is supported by the main nozzle portion 62 inserted into the unsealed edge 2, and then the main nozzle portion 62 descends, and the first guide member 65 and the second guide member 66 , The standing pouch 1 is loaded into the transfer holder 8 on the transfer device 20.

After the standing pouch 1 is put into the transfer holder 8, the rotating body 54 of the third transfer device 13 is further moved.
After the 90-degree intermittent rotation, the transfer pad 55A is positioned at the idle station D and waits.
When the rotation is intermittently performed and the positioning station A is positioned, the above operation is repeated.

Another transfer pad 55 of the third transfer device 13
B, 55C, and 55D operate similarly to the transfer pad 55A.

In the case of a standing pouch with a cap in which a cap is attached to the cap mounting portion, the recess has substantially the same shape as that of the straw body standing pouch. Can be aligned by contacting the

In a normal standing pouch 110 having no straw portion or cap mounting portion on the unsealed edge side and an unsealed edge 111 extending in the entire width direction of the standing pouch as shown in FIG. 8, a positioning jig 43 (FIG. 4). )
The stopper pin 48 in FIG.
A positioning jig 77 in which a stopper plate 76 is fixed to the left end portion of the above can be used.

The standing pouch input device 10
Has the following effects (1) to (3). (1) The positioning device 15 positions the dent 7 on the unsealed edge 2 side of the standing pouch 1, the dent 102 on the unsealed edge 103 side of the standing pouch 100, and the unsealed edge 111 of the standing pouch 100 to form a standing pouch. 1, 100, 110 are positioned, and the temporary opening device 16 suctions the unsealed edges 2, 103, 111 near the walls 3 of the standing pouches 1, 100, 110 with the temporary opening pad 58, and the unsealed edges 2, 103, 1
11, the main opening / inflation / injection device 17 closes the unsealed edges 2, 103, 111 in the walls 3 of the standing pouches 1, 100, 110 near the main opening pad 6.
4, the unsealed edges 2, 103, 111 are fully opened, so that the temporary opening pad of the temporary opening device 16 can be used for various types of standing pouches 1, 100, 110 having different sizes and shapes. It is not necessary to change the position of the main opening pad 64 of the main opening / inflation / injection / injection device 17, and as a result, the unsealed edges 2, 103 of various types of standing pouches 1, 100, 110 having different sizes and shapes. , 111 can be satisfactorily opened.

(2) The temporary opening device 16 is provided with the unsealed edges 2, 103, 111 of the standing pouches 1, 100, 110.
After the temporary opening, the main opening, inflating and charging device 17
Makes full opening of the unsealed edges 2, 103, 111 of the standing pouches 1, 100, 110.
The unsealed edges 2, 103, 111 of the standing pouches 1, 100, 110 can be reliably opened in a short time.

Since the opening / inflation / injection device 17 inserts the standing pouches 1, 100, 110 having the unsealed edges 2, 103, 111 into the transfer holder 8, the standing pouch 1, which is not opened, 1
00,110 in comparison with the case of turning on the can reduce the size of the width W _B of the transport holder 8, can be made compact the transport holder 8. As a result, the transfer holder 8 is moved to its width W.
_The transport device 20 for transporting in the _B direction can be made compact.

[0056]

As described above, according to the bag opening apparatus of the present invention, the unsealed edge of the bag can be well opened even for various types of bags having different sizes and shapes.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a basic configuration of the present invention.

FIG. 2 is a perspective view showing a standing pouch line having a standing pouch input device to which one embodiment of the bag opening device according to the present invention is applied.

FIG. 3 is a side view showing the standing pouch input device of FIG. 1;

FIG. 4 is a plan view showing the positioning jig of FIG. 1 together with a standing pouch with a straw.

FIG. 5 is a sectional view taken along the line VI-VI of FIG. 4;

FIG. 6 is a sectional view taken along line VII-VII in FIG.

FIG. 7 is a perspective view showing a transfer holder into which a standing pouch is inserted.

FIG. 8 is a plan view showing a positioning jig accommodating a normal standing pouch.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Standing pouch 2 Unsealed edge 3 Wall part 8 Transfer holder 10 Standing pouch loading device (bag opening device) 13 Third transfer device (transfer device) 15 Positioning device (positioning device) 16 Temporary opening device (opening device) 17 Opening / expanding / injecting device (opening means, inflating means, injecting means) 43 Positioning jig 48 Stopper pin (stopper member) 54 Rotating body 55A, 55B, 55C, 55D Transfer pad 58 Temporary opening pad 59 Sub nozzle section 62 Main nozzle section 64 Opening pad 76 Stopper plate (stopper member) 77 Positioning jig 110 Standing pouch 111 Unsealed edge

Claims (2)

[Claims] 1. A bag opening device for opening an unsealed edge of a bag, a positioning means for positioning the unsealed edge side of the bag and positioning the bag, and the unsealed edge on a wall portion of the bag. Opening means for opening the unsealed edge by suctioning the vicinity with a suction member. 2. The positioning means includes a stopper member on the unsealed edge side of the bag, positions the unsealed edge of the bag by contacting the stopper member, and positions the bag. A bag opening apparatus according to claim 1.