JP2005271936A - Method and apparatus for removing empty bag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method removing an empty bag which sorts out an empty bag and a filled bag separately regardless of a form for conveying the empty bag and the filled bag in a process of sorting out the empty bag and the bag filled with an article separately. <P>SOLUTION: In sorting out the filled bag a and the empty bags b separately, each bag a, b is placed on a conveying means 10 and conveyed. The empty bag b conveyed alone, or conveyed while being on top of the filled bag a on the conveying means 10 is sucked to be removed by a first suction means 20 disposed upstream along the conveying means 10. The empty bag b transferred while being held under the filled bag a on the conveying means 10 is sucked to be removed by a second suction means 30 disposed at the end of the conveying means 10. The empty bag b conveyed on the conveying means 10 is made to fall and separated without being sucked by the second suction means 30. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an empty bag removing method and apparatus for sorting bags filled with articles and unfilled empty bags. For example, it is used for removing empty bags that are generated when filling a bag with confectionery or food.

  Conventionally, articles such as confectionery and foods, especially powdery, granular or liquid products, are packed and shipped by filling the bag-like packaging container with one end opened and then sealing the opening. Yes.

  A bag used for such a filling operation is normally transported in a flat state, and the bag is inflated and opened by means such as blowing air before filling the article, and then the article is filled. . However, there are cases where the bags move without being separated in an overlapped state, and stick to the filled bags, so that the contents are shipped without being filled but empty. If such empty bags are mixed, the consumer determines that there are not enough products for the empty bags, which causes consumer complaints.

Therefore, an apparatus has been proposed in which an empty bag is detected to prevent the occurrence of an empty bag. For example, Patent Document 1 below is a device that replenishes a product to a bucket shortage to a bucket conveyor that supplies a product in units of a packaging machine pitch of the packaging machine, and detects the presence or absence of the product on the bucket conveyor. A product detector, a product replenishing device that is provided downstream of the product detector and supplies the same pre-prepared same product onto the bucket in a quantity shortage quantity, and a product quantity shortage detection signal and packaging of the product detector From the control device that drives the product replenishing device and replenishes the bucket with the required amount of product after counting the synchronizing signal according to the interval between the product detector and the product replenishing device by the synchronization signal generated for each packaging pitch of the machine A product replenishing device for a shortage bucket supplied to a packaging machine, characterized in that it is configured, is disclosed.
JP-A-6-127527

  However, in the invention of the above-mentioned patent document 1, it is detected that a product is not supplied by a photoelectric sensor provided in the middle of the transporting process in the previous stage of the packaging process, the product replenishing device is operated, and the empty bucket Due to the configuration in which the product is supplied, there is a problem that a slight time lag occurs between the operation of the photoelectric sensor, the product replenishing device, and the conveying process, and it is not possible to work continuously.

  On the other hand, when the empty bag has been transported mixed in the filling bag, it may be possible to suction and remove only the empty bag using an empty body suction removal device having a suction means and a transport means, Since the empty bag may be conveyed under the filling bag, it was not possible to completely prevent the empty bag from being shipped together with the filling bag without being sucked.

  Therefore, an object of the present invention is to select a filling bag filled with an article and an empty bag, and even if the empty bag is conveyed in a state where it is an underlay of the filling bag, The present invention provides a method and apparatus for removing empty bags.

  In order to achieve the above object, an empty bag removing method according to the present invention is the empty bag removing method for selecting a filled bag filled with articles and an empty bag, and each bag is placed on a conveying means and conveyed. The empty bag that is transported alone or on the filling bag is sucked and removed by the first suction means disposed above the transporting means, and the filling bag is placed on the transporting means. The empty bag transported under the sheet is sucked and removed by the second suction means disposed at the end of the transport means, and the filling bag transported on the transport means is used as the second suction means. It is characterized by being dropped and separated without being adsorbed.

  According to the empty bag removing method of the present invention, the empty bag carried on the conveying means alone or on the filling bag is sucked and removed by the first suction means, and the filling bag is formed on the conveying means. The empty bag that is conveyed underneath is sucked and removed by the second suction means, and the filling bag that is conveyed on the conveyance means is dropped and separated without being adsorbed by the second suction means. Therefore, even if the empty bag is carried alone or on the filling bag or under the filling bag and conveyed, it is possible to sort the filling bag and the empty bag and remove only the empty bag. Moreover, it is not necessary to use a sensor as in the invention of Patent Document 1 described above.

  The empty bag removing apparatus of the present invention can suck and remove the conveying means for placing and conveying the respective bags and the empty bag carried on the conveying means alone or on the filling bag. In addition, a first suction unit disposed above the transport unit and an end of the transport unit so that the empty bag transported under the filling bag can be sucked and removed on the transport unit. And the second suction means is configured to drop the filling bag transported on the transport means without being attracted to the second suction means.

  According to the empty bag removing device of the present invention, the empty bag carried on the conveying means alone or on the filling bag can be sucked and removed by the first suction means arranged above the conveying means, In addition, the empty bag conveyed under the filling bag on the conveying means can be sucked and removed by the second suction means arranged at the end of the conveying means, and further, the filling bag conveyed on the conveying means Can be separated by being dropped without being adsorbed by the second suction means.

  In the empty bag removing device of the present invention, the first suction means is a belt arranged in parallel so as to overlap at least the terminal portion of the transport means, and is arranged at predetermined intervals along the longitudinal direction of the belt. A belt having a plurality of formed suction holes, a guide frame having a suction groove disposed in contact with the upper surface side of the lower running portion of the belt, and a space that communicates with the space of the suction groove. It is preferable to be composed of a suction tube.

  According to this, by sucking from the suction hole of the belt through the suction tube and the suction groove of the first suction means, the empty bag conveyed on the conveying means alone or on the filling bag, It can be separated by being adsorbed to the belt by suction from the suction hole and carried by the first suction means. In addition, since the belt of the first suction means is arranged in parallel so as to overlap at least the end portion of the transport means, a certain amount of time and distance for adsorbing the empty bag by the first suction means is secured. The empty bag can be adsorbed to the first suction means.

  In the empty bag removing device of the present invention, it is preferable that at least a part of the upper traveling portion of the conveying means is elastically pressed against the lower traveling portion of the belt.

  According to this, since the empty bag is pressed against the lower traveling portion of the belt of the first suction means when the empty bag is conveyed alone or on the filling bag, the suction means Adsorption by the holes can be performed more reliably.

  Furthermore, in the empty bag removing apparatus of the present invention, it is preferable that the second suction means is composed of a suction drum that is rotatably disposed adjacent to a terminal portion of the transport means.

  According to this, the empty bag conveyed under the filling bag on the conveying means is effectively adsorbed by the suction drum rotating at the terminal end of the conveying means and falls without being adsorbed by the suction drum. It can be reliably separated from the filling bag.

  According to the present invention, the empty bag carried on the conveying means alone or on the filling bag is removed by suction by the first suction means, and the conveying means is conveyed under the filling bag. Since the empty bag is sucked and removed by the second suction means, the filling bag and the empty bag can be sorted and only the empty bag can be removed.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 9 show an embodiment of an empty bag removing device according to the present invention. 1 is an exploded perspective view showing the entire empty bag removing apparatus of the present invention, FIG. 2 is a front view of the entire empty bag removing apparatus, FIG. 3 is a conveying means in the empty bag removing apparatus, and FIG. FIGS. 4A and 4B are front views, FIG. 4 is an enlarged perspective view of the vicinity of the terminal portion of the conveying means in the empty bag removing apparatus, FIG. 5 is the first suction means in the empty bag removing apparatus, and FIG. FIGS. 6A and 6B are front views, FIG. 6 is a plan view showing a state where the belt is removed in the first suction means in the empty bag removing apparatus, and FIG. 7D is a first drawing means in FIG. FIG. 8 is a cross-sectional view taken along line C-C of FIG. 5 of the first suction means in the empty bag removing device, and FIG. It is a top view and a front view.

  As shown in FIG. 1 and FIG. 2, this empty bag removing device 100 places a filling bag a and an empty bag b and conveys them, and at least above the terminal portion of the conveying means 10. The first suction means 20 arranged in parallel so as to overlap each other and the second suction means 30 adjacent to the terminal end of the transport means 10 are mainly configured.

  The conveying means 10 is installed on a frame 1 a supported by a plurality of legs 1. Referring also to FIG. 3, the conveying means 10 is disposed at a pair of side plates 11, 11 arranged in parallel at a predetermined interval and at both ends in the longitudinal direction of the side plates 11, 11 and is rotatable. Both end rollers 12 and 12 supported by the side plates 11 and 11 so as to be, a shaft portion 13 inserted through a slit 11a formed in the middle of the side plates 11 and 11 and extending vertically, and the shaft portion 13 is mainly composed of a center roller 13a rotatably supported via 13 and a belt 14 stretched on the outer periphery of the both end rollers 12, 12 and the center roller 13a.

  Further, attachment plates 15 are fixed to the sidewalls of the side plates 11 and 11 at two places on each side, for a total of four places, and the first suction means 20 is attached via the plates 15.

  A circular plate 13b is fixed to both end portions of the shaft portion 13 that is inserted through the slit 11a and protrudes from the side plates 11 and 11. The circular plate 13b is disposed outside the side plates 11 and 11 so as to sandwich the side plates 11 and 11, and holds the shaft portion 13 so that it can move up and down along the slit 11a.

  In addition, as shown in FIG. 4, one end of a coil spring 50 is hooked on both ends of the shaft portion 13. Further, the other end of the coil spring 50 is hooked on a protrusion 22 d formed on the guide frame 22 of the first suction means 20. For this reason, the center roller 13a is always urged upward, and is urged in the direction of lifting the belt 14 upward. Therefore, the belt 14 is pressed against the lower surface of the first suction means 20.

  A sprocket (not shown) is attached to at least one of the both end rollers 12, 12, and the sprocket is rotated via a chain (not shown) by a driving sprocket that is rotated by a driving source such as a motor (not shown). , 12 run in the direction of arrow A in FIG. 1 so that the endless belt 14 circulates. As a result, a filled bag a filled with a product sent from a bag filling device (not shown) and an empty bag b which is a defective product not filled with the product are carried on the belt 14 in the direction of arrow A.

  The first suction means 20 is arranged substantially in parallel so as to overlap from the middle of the conveying means 10 to the upper end portion via the mounting plate 15 fixed to the side plates 11 and 11 of the conveying means 10 described above. Extending further forward from the end of the means 10.

  As shown in FIGS. 5 and 6, the first suction means 20 is stretched between a pair of guide frames 22, rollers 23 and 25 attached to both ends of the guide frame 22, and these rollers 23 and 25. Belt 21. One roller 23 is mounted on a support shaft 24 inserted through the end of the guide frame 22, and a drive roller 28 is mounted on one end of the support shaft 24 protruding from the guide frame 22. ing. A belt 24c that is rotated by a driving source (not shown) is stretched around the driving roller 28, and the support shaft 24 is rotated via the driving roller 28 by the driving source, and the roller 23 is rotated to rotate the belt 21. ing.

  Referring also to FIG. 7, the guide frame 22 is formed with a slit-like suction groove 22b whose bottom surface is open. Further, ribs 22 a for guiding both side portions of the belt 21 are formed on both sides of the guide frame 22. Further, a communication hole 22 c is formed in the inner wall of the portion adjacent to one roller 25. Note that the pair of guide frames 22 are connected to each other at both ends by cylindrical connecting portions 29a and 29b.

  A plurality of suction holes 21a are formed at predetermined intervals in the belt 21 stretched between the pair of rollers 23 and 25. When the belt 21 runs on the surface where the suction groove 22 b in FIG. 7 is opened, the suction hole 21 a communicates with the slit-like suction groove 22 b of the guide frame 22. When the belt 21 runs on the surface where the suction groove 22b in FIG. 7 is not open, the suction hole 21a is blocked by the wall of the guide frame 22.

  As shown in FIG. 8, the communication hole 22 c of the guide frame 22 communicates with the cylindrical coupling portion 29 b, and the coupling portion 29 b communicates within the suction grooves 22 b of the pair of left and right guide frames 22. A suction tube 27 is connected to the communication hole 22 c formed outside the one guide frame 22. A bellows-like hose (not shown) is connected to the suction pipe 27, and a suction device (not shown) is connected to the hose. This suction device is roughly provided with a motor, a fan rotated by the motor, and an exhaust port, and can suck air by rotation of the fan.

  Therefore, when suction is performed through the suction tube 27 by the suction device, the pressure in the suction groove 22b is reduced, and when the belt 21 travels on the surface of the guide frame 22 where the suction groove 22b is opened, the suction groove 21b passes through the suction hole 21a. Suction is made. In addition, as a magnitude | size of the suction hole 21a formed in the belt 21, when the bag with which the goods were filled is 5-40g, it is preferable that it is (phi) 1-8 mm. The suction force from the suction hole 21 a may be adjusted so that only the empty bag b is sucked by the belt 21 without the filling bag a being sucked by the belt 21.

  As shown in FIG. 6, the suction groove 22b provided in the guide frame 22 is formed only up to the front end and the end in the longitudinal direction, and no suction force is generated at the start end and the end. Accordingly, the empty bag b transported to the end by the belt 21 loses the suction force at the end and falls naturally. A first storage box 51 is disposed below the end portion of the belt 21, and the empty bag b dropped as described above is stored in the first storage box 51.

  Next, the second suction unit 30 is disposed adjacent to the end of the transport unit 10 in the transport direction A. The second suction means 30 is mounted on a pair of side plates 11, 11 constituting the transport means 10 via attachment plates 31, 31. That is, the suction drum 33 is rotatably supported by the mounting plates 31 and 31 via the hollow shaft 32, and a plurality of suction holes 33 a are formed on the peripheral surface of the suction drum 33. The suction hole 33 a communicates with the inside of the hollow shaft 32. A suction pipe 34 is connected to one end of the hollow shaft 32, and air is sucked through the suction pipe 34 by a suction means (not shown), whereby suction is performed from the suction hole 33a on the surface of the suction drum 33. It is like that. More specifically, the filling bag a is not sucked and is slid down from the suction drum 33, and the empty bag b is sucked and adjusted so as to have a suction force that rotates together with the suction drum 33. In addition, a shooter 35 is provided below the suction drum 33 and at a position from the transport conveyor 40 so that the filled bag a slipped off from the suction drum 33 is placed on the transport conveyor 40. It has become.

  The suction drum 33 is rotated by a drive source (not shown) via a sprocket (not shown) attached to one end of the hollow shaft 32 and a chain (not shown) attached to the sprocket. The drive source in this case may be shared with the drive source of the transport unit 10, whereby the suction drum 33 rotates in synchronization with the transport unit 10. A second storage box 52 is arranged below the suction drum 33.

  The conveyor 40 for taking out the filling bag a is supported by a plurality of legs 3 and is disposed obliquely below the second suction means 30. And the filling bag a which slides down without being attracted | sucked by the suction drum 33 of a 2nd suction means is mounted in the conveyance conveyor 40, and is conveyed to a packing apparatus etc.

  Next, the operation of the empty bag removing device 100 will be described. The empty bag removing device 100 can sort, for example, a filling bag a filled with an article and an empty bag b in any of the following four modes. There are the following four modes as modes of conveyance. In the first aspect, when only the filling bag a is conveyed, in the second aspect, when only the empty bag is conveyed, the third aspect is placed on the filling bag a and the empty bag b is conveyed. In this case, the fourth mode is a case where the empty bag b is transported under the filling bag a. Hereinafter, each aspect is demonstrated, referring FIG.1 and FIG.2.

  When only the filling bag a has been carried on the carrying means 10 as in the first aspect, the filling bag a has a suction force from the suction hole 21a of the first suction means 20 due to its own mass. Against this, it is not attracted to the belt 21 and moves to the suction drum 33 of the second suction means 30 as it is. The filling bag a is not adsorbed by the suction force from the suction hole 33a of the suction drum 33, and slides down on the shooter 35 along the curve of the suction drum 33, and is placed on the transport conveyor 40, such as a packing device. It is carried to the next process.

  Here, “not adsorbed” in the present invention does not only mean that the filled bag a is not adsorbed at all, but also a concept including some adsorption. That is, this slight adsorption means that, for example, when the filling bag a is adsorbed from the vertical direction (gravity direction) to the adsorption portion of the belt 21 or the suction drum 33, the time for which the filling bag a is adsorbed is within 1 second. Adsorption refers to adsorption, preferably within 0.5 seconds, and more preferably within 0.2 seconds.

  Next, when only the empty bag b has been conveyed as in the second aspect, the empty bag b is a portion where the belt 14 is pressed against the lower surface of the first suction means 20 by the coil spring 50, and is The suction means 20 is in close contact with the belt 21 and is attracted to the lower surface of the belt 21 by the suction force from the suction hole 21a. Then, even after passing through the end portion of the conveying means 10, it moves further forward while being adsorbed by the belt 21, and at the end portion of the first suction means 20, the suction hole 21 a of the belt 21 becomes the suction groove 22 b of the guide frame 22. When the suction is released and the belt 21 is released, it falls from the belt 21 and is stored in the first storage box 51.

  Next, as in the third aspect, when the empty bag b has been carried on the filling bag a (see FIG. 2, c), the belt 14 is placed on the lower surface of the first suction means 20 by the coil spring 50. The empty bag b is in close contact with the belt 21 of the first suction means 20 at the press-contacted portion, and is attracted to the lower surface of the belt 21 by the suction force from the suction hole 21a. At the terminal portion of the transport means 10, only the filled bag a slides down on the shooter 35 and is placed on the transport conveyor 40, and the empty bag b is further moved forward while being adsorbed by the belt 21, and the first suction. The suction is released at the end of the means 20, falls from the belt 21, and is stored in the first storage box 51.

  Furthermore, as in the fourth aspect, when the empty bag b is conveyed under the filling bag a (see FIG. 2, d), both the filling bag a and the empty bag b are the first suction means. Instead of being attracted to the 20 belts 21, it is carried to the end of the conveying means 10. Then, when placed on the suction drum 33 of the second suction means 30, the empty bag b disposed below is attracted to the suction hole 33 a of the suction drum 33 and rotates together with the rotation of the suction drum 33. On the other hand, the filling bag a is not adsorbed by the suction drum 33, slides down on the shooter 35, is placed on the transport conveyor 40, and is carried to the next step. The empty bag b adsorbed to the suction drum 33 is peeled off by a scraper (not shown), and dropped into the second storage box 52 and collected.

  As described above, according to the empty bag removing apparatus 100 of the present invention, the filled bag a filled with the articles and the empty bag b can be selected while being conveyed, and in particular, the underlay of the filled bag a. The empty bag b can be removed from the process.

  In the above embodiment, the first suction means 20 employs a structure that sucks and removes the empty bag a, but a structure that sucks and collects the empty bag by the suction means can also be employed.

  INDUSTRIAL APPLICABILITY The present invention can be suitably used for an empty bag removing method and device for the purpose of sorting out bags filled with articles and empty bags not filled.

It is a disassembled perspective view which shows one Embodiment of the empty bag removal apparatus of this invention. It is a front view of the whole empty bag removal apparatus. It is a conveyance means in the empty bag removal apparatus, (a) is a plan view and (b) is a front view. It is an expansion perspective view of the terminal part vicinity of the conveyance means in the empty bag removal apparatus. It is the 1st suction means in the empty bag removal apparatus, (a) is a top view, (b) is a front view. It is a top view which shows the state which removed the belt in the 1st suction means in the empty bag removal apparatus. It is sectional drawing along the DD arrow line of FIG. 6 of the 1st suction means in the empty bag removal apparatus. It is sectional drawing along CC arrow of FIG. 5 of the 1st suction means in the empty bag removal apparatus. It is a suction drum in the empty bag removing apparatus, (a) is a plan view and (b) is a front view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Conveyance means 11 Side plate 11a Slit 12 Both ends roller 13 Shaft part 13a Center roller 13b Circular plate 14 Belt 15 Plate 20 First suction means 21 Belt 21a Suction hole 22 Guide frame 22a Rib 22b Suction groove 22c Communication hole 22d Projection 23, 25 Roller 24 Support shaft 24c Belt 27 Suction tube 28 Driving roller 29a Connection portion 29b Connection portion 30 Second suction means 31 Plate 32 Hollow shaft 33 Suction drum 33a Suction hole 34 Suction tube 35 Shooter 40 Conveyor 50 Coil spring 51 First storage box 52 Second storage box 100 Empty bag removing device A Transport direction a Filling bag b Empty bag

Claims (5)

In an empty bag removing method for selecting a filling bag filled with articles and an empty bag,
Each bag is placed on a conveying means and conveyed,
The empty bag that is transported alone or on the filling bag is sucked and removed by the first suction means disposed above the transport means,
The empty bag which is conveyed under the filling bag on the conveying means is sucked and removed by the second suction means arranged at the end of the conveying means,
An empty bag removing method, wherein the filling bag conveyed on the conveying means is dropped and separated without being adsorbed by the second suction means. In an empty bag removing device that sorts a filled bag filled with articles and an empty bag,
Transport means for placing and transporting each bag;
A first suction means disposed above the conveying means so that an empty bag conveyed on the conveying means alone or on the filling bag can be removed by suction;
A second suction means disposed at the end of the transport means so as to suck and remove the empty bag transported under the filling bag on the transport means;
An empty bag removing apparatus, wherein the filling bag conveyed on the conveying means is configured to fall without being adsorbed by the second suction means.   The first suction means is a belt arranged in parallel so as to overlap at least the end portion of the transport means, and has a plurality of suction holes formed at predetermined intervals along the longitudinal direction of the belt. A belt, a guide frame having a suction groove disposed in contact with an upper surface side of a lower traveling portion of the belt, and a suction pipe disposed so as to communicate with the space of the suction groove. Item 3. The empty bag removing device according to Item 2.   The empty bag removing device according to claim 3, wherein at least a part of the upper traveling portion of the conveying means is elastically pressed against the lower traveling portion of the belt.   The empty bag removing device according to any one of claims 2 to 4, wherein the second suction unit includes a suction drum that is rotatably disposed adjacent to a terminal portion of the transport unit.

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