Bagging and filling device

Abstract

To solve problems of a slow packaging work speed and a strict temperature control of a heat sealer for heat sealing, since requiring a work process for heat sealing in advance in a conventional bagging filling device in which a folded part of an article to be packaged is heat sealed to one inner surface side of a bag mouth before filling.SOLUTION: A bagging filling device 10 for a gusset bag G of the present invention comprises: a suction cup 22 for opening a bag mouth Gb of the gusset bag G; a hopper 21 inserted into the opened gusset bag G to deposit an article to be packaged; and an injection nozzle 23 for injecting air onto a folded part Ga of the bag mouth Gb of the opened gusset bag G and retreating a tip part of the hopper 21 to a retreat position where it does not come into contact with the folded part Ga. With this configuration, when both sides of the bag mouth of the gusset bag G are clamped by a clamp 90 and the bag mouth Gb is opened by the suction cup 22, the injection nozzle 23 injects high pressure air to the folded part Ga of the bag mouth Gb and the folded part Ga is drawn to one inner surface side of the bag mouth Gb, thereby the tip part can be retracted to the retreat position where the tip part of the hopper 21 does not come into contact with the folded part Ga.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a bag filling and filling device for filling gusset bags with packaged materials. [Background technology]

[0002] Filling devices that insert the tip of a hopper into the mouth of a bag to fill the bag with the packaged material are already widely known and are also used in rotary-type packaging devices, etc. In such filling devices, the bag to be filled may be a gusset bag G having fold-in portions (gusset portions) Ga on the inside of both side portions, as shown in Figure 7.

[0003] 8, when the folded-in portion Ga of the bag mouth Gb is clamped by a clamp (clamping mechanism) 90 of the filling device and the bag mouth Gb is opened by an opening mechanism such as a suction cup 91, the folded-in portion Ga of the gusset bag G protrudes inside the bag mouth Gb, and in this state, when the tip of a hopper 92 is inserted into the bag mouth Gb of the gusset bag G, the tip of the hopper 92 may come into contact with the folded-in portion Ga of the gusset bag G. In this case, the folded-in portion Ga and the bag mouth Gb are more likely to be deformed or damaged, resulting in an accident in which the packaged item cannot be filled into the bag or the packaged item spills out of the bag.

[0004] As a method for dealing with such problems, Patent Documents 1 and 2 disclose a technique in which the fold-in portion Ga is heat-sealed to the inside of one of the inner surfaces of the bag mouth Gb before the bag mouth Gb is filled with the packaged goods. With this configuration, as shown in Fig. 9, the fold-in portion Ga is heat-sealed to the inside of one of the side surfaces of the bag mouth Gb, so that the fold-in portion Ga does not protrude inward from the side surface of the bag mouth Gb. This prevents the fold-in portion Ga from hitting the tip of the hopper 92, and prevents the fold-in portion Ga and the bag mouth Gb from being deformed or damaged, and thus the packaged goods can be reliably filled into the bag. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Utility Model Registration No. 3115337 [Patent Document 2] Utility Model Registration No. 3200955 Summary of the Invention [Problem to be solved by the invention]

[0006] However, as disclosed in Patent Documents 1 and 2, in a configuration in which the folded-in portion Ga is heat-sealed to one inner side of the bag mouth Gb before the packaged product is filled, a work step for heat sealing is required, which slows down the speed of the packaging work. In addition, since the folded-in portion Ga is heat-sealed only to the inner side of one side of the bag mouth Gb, strict temperature control of the heat sealer for heat sealing is required. Furthermore, since there is a possibility that the heat sealing may fail, the worker must keep a close eye on the heat sealing work, which is a burden on the worker.

[0007] The present invention has been made to solve the above-mentioned problems, and aims to provide a bag filling and filling device which not only prevents the folding portion from colliding with the tip of the hopper, but also suppresses delays in the packaging work speed, does not require strict temperature control of the heat sealer, and reduces the burden on the worker. [Means for solving the problem]

[0008] The bag filling apparatus of the present invention is a filling apparatus which inserts the tip of a hopper into the mouth of a gusset bag to fill the packaged material into the gusset bag, and is characterized in that it comprises an opening means for opening the mouth of the gusset bag, a hopper for inserting the packaged material into the open gusset bag, and an injection means for injecting air into the folded portion of the mouth of the open gusset bag to retract the tip of the hopper to a retracted position where it does not come into contact with the folded portion.

[0009] According to the present invention, when both sides of the mouth of the gusset bag are clamped by the clamping mechanism and the mouth is opened by the opening means, the injection means injects air into the fold-in portion Ga of the mouth Gb to move the fold-in portion Ga toward one of the inner faces of the mouth, thereby allowing the tip of the hopper to retract to a retracted position where it does not come into contact with the fold-in portion Ga. This prevents the fold-in portion from coming into contact with the tip of the hopper, and prevents the fold-in portion or the mouth of the bag from being deformed or damaged by the tip of the hopper, allowing the packaged items to be stably filled into the gusset bag. Effect of the Invention

[0010] The present invention, with the above-mentioned configuration, can increase the speed of packaging work by simply injecting air into the folded-in portion Ga when the bag mouth Gb of the gusset bag is opened, eliminating the need for a process of heat sealing the folded-in portion Ga. In addition, it is not necessary to change the temperature setting of the heat sealer according to the material and thickness of the packaging material when the type of product to be packaged changes, or to strictly control the temperature of the heat sealer for heat sealing during continuous packaging work, and there is no burden on the worker in the heat sealing process. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is a partial plan view of a packaging device equipped with a bag filling device according to the present invention. [Diagram 2] FIG. 1 is a partial right side view of a packaging apparatus equipped with a bag filling and filling device according to the present invention. [Diagram 3] FIG. 1 is a partial left side view of a packaging device equipped with a bag filling device according to the present invention. [Figure 4] A plan view of the mouth of the gusset bag opened by a suction cup [Diagram 5] Plan view of compressed air being sprayed from the spray nozzle onto the folded part of the gusset bag [Figure 6] Plan view of the hopper tip inserted into the mouth of the gusset bag [Figure 7] Perspective view of a gusseted bag [Figure 8] FIG. 1 is an explanatory diagram illustrating a defect of a conventional filling device. [Figure 9] FIG. 1 is an explanatory diagram showing an improved filling operation of a conventional filling device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] The bagging and filling device of the present invention will be described below with reference to the drawings. Figure 1 is a partial plan view of a rotary type packaging device 1 equipped with the bagging and filling device of the present invention, and Figures 2 and 3 are partial right and left side views of the packaging device equipped with the bagging and filling device of the present invention.

[0013] The bagging and filling device 10 of the present invention shown in Figs. 1 to 3 is installed in a rotary type packaging device 1 that continuously fills and packages a gusset bag G with a predetermined amount (for example, a predetermined weight or number) of packaged items. In this rotary type packaging device 1, for example, eight pairs of clamp arms 4 are supported on the periphery of a circular rotor 5, and a clamp (clamping mechanism) 3 that clamps both side edges of the gusset bag G from the front and rear is attached to the tip of each clamp arm 4. The circular rotor 5 is allocated to a plurality of sections in which packaging work is performed, one of which is a filling section SJ, in which the packaged items are filled into the gusset bag G. A drive conveying motor (not shown) is disposed below the circular rotor 5. When the rotational driving force of this drive conveying motor is transmitted to the circular rotor 5, the eight pairs of clamp arms 4 rotate intermittently in a clockwise direction (rotation direction R) at equal intervals of 45° in the circumferential direction, and sequentially transfer the gusset bag G to each section. Although the packaging device equipped with the bag filling apparatus 10 will be described as a rotary type packaging device, the present invention is not necessarily limited to this type of packaging device, and may be, for example, a linear or elliptical type packaging device.

[0014] The gusset bag G is suspended from the clamp arm 4 by being clamped at both sides by a pair of clamps 3. As shown in FIG. 3, the clamp 3 opens and closes the claws 3A on the front side by an air cylinder 11 provided below the circular rotor 5 to clamp and release both sides of the gusset bag G. That is, when the rod 11a of the air cylinder 11 is retracted, the movable rod 14 slides toward the rear end (leftward in FIG. 3) due to the biasing force of a compression spring (not shown) in the clamp arm 4, and the claws 3A on the front side connected to the movable rod 14 close, and the clamp 3 clamps the gusset bag G. Conversely, when the rod 11a of the air cylinder 11 protrudes, the link mechanism 12 for opening and closing the clamp rotates, and the tip of the link mechanism 12 pushes the roller pin 13 toward the front end (rightward in FIG. 3), and at the same time, the movable rod 14 to which the roller pin 13 is attached is pressed toward the front end, and the claws 3A on the front end open to release both sides of the gusset bag G.

[0015] As shown in Figs. 1 and 3, the tips of the pair of left and right clamp arms 4 are configured to open and close around a shaft 4A that supports the base end of the clamp arm 4. The tips of the clamp arms 4 are opened and closed by a roller 4B provided at the base end of the clamp arm 4 moving up and down while rolling on a circumferential cam (not shown). Since the bag mouth Gb of the gusset bag G is closed in sections other than the filling section SJ, the tips of the pair of left and right clamp arms 4 are more open than when the bag mouth Gb is located in the filling section SJ. Conversely, in the filling section SJ, in order to open the bag mouth Gb, the tips of the pair of left and right clamp arms 4 are more closed than when the bag mouth Gb is located outside the filling section SJ. At this time, the upper central portions of the front and rear of the gusset bag G are sucked by a pair of suction cups 22, and when the pair of suction cups 22 are separated in the front-rear direction, the bag mouth Gb opens as shown in Figs. 4 to 6.

[0016] As shown in Figures 1 and 2, the bag filling and filling device 10 of the present invention is a filling device that inserts the tip 21a of a hopper 21 into the bag mouth Gb of a gusset bag G to fill the gusset bag G with the packaged material. This bag filling and filling device 10 includes a pair of suction cups (opening means) 22 that open the bag mouth Gb of the gusset bag G, a hopper 21 that is inserted into the open gusset bag G to put in the packaged material, and an injection nozzle (injection means) 23 that injects air into the fold-in part Ga of the bag mouth Gb of the open gusset bag G to retract the tip of the hopper 21 to a retracted position where it does not contact the fold-in part Ga. Each component of the bag filling and filling device 10 will be described below.

[0017] In this embodiment, the opening means 22 uses a pair of suction cups, and as described above, the pair of suction cups 22 suck the central upper part of the gusset bag G, and the pair of suction cups 22 are separated in the front-rear direction to open the bag mouth Gb. The mechanism for separating the pair of suction cups 22 in the front-rear direction is not shown, but is a conventionally known mechanism. Note that reference numeral 24 in Figs. 1 to 3 denotes a suction tube connected to the suction cups 22 and sucks air. The opening means 22 is not limited to the suction cups 22 as described above, and may be, for example, a thick metal wire or a rectangular metal spatula. The tip of such a pair of wires or spatula is inserted into the bag mouth Gb and opened in the front-rear direction to open the bag mouth Gb.

[0018] As shown in Fig. 2, the hopper 21 is supported by a support 31 so as to be movable up and down. That is, a lift rod 32 is inserted into the support 31, a bracket 33 is attached to the lift rod 32 in the horizontal direction, and the hopper 21 is attached to the tip of the bracket 33. The lift rod 32 is raised and lowered by a lift drive mechanism (not shown), and when the hopper 21 descends, the tip of the hopper 21 is inserted into the bag mouth of the gusset bag G to fill the packaged item. The hopper 21 becomes thinner toward the bottom, and when the packaged item is filled, the thinnest tip is inserted into the bag mouth Gb. Note that above the hopper 21, a packaged item supplying device such as an auger filler that puts the packaged item into the hopper 21 is disposed.

[0019] The injection means is an injection nozzle for injecting air, and is attached at a downward incline to both ends of an attachment arm 25 attached to the suction tube 24 of the suction cup 22. The injection hole at the tip of the injection nozzle 23 is circular or elliptical, but may be slit-shaped. Such an injection nozzle 23 injects air into the folded part Ga of the gusset bag G to move the folded part Ga toward one inner side of the bag mouth Gb, so that the tip of the hopper 21 can be retracted to a retracted position where it does not come into contact with the folded part Ga even when it descends. An air hose for supplying high-pressure air is connected to the injection nozzle 23, and high-pressure air is locally injected onto one surface of the folded part Ga to hit the folded part Ga, thereby pressing the folded part Ga against one inner side of the bag mouth Gb.

[0020] It is preferable that the injection nozzle 23 is structured so that the angle can be freely changed according to the type of gusset bag G. Although the two injection nozzles 23 are attached so as to inject air in the same direction in Fig. 1, they may be configured so as to inject air in opposite directions. Although the injection nozzle 23 is attached to the suction pipe 24 via an attachment arm 25 in Fig. 1, the injection nozzle 23 may be attached to the hopper 21 or installed independently, and the attachment position is not limited to a specific location. The injection nozzle 23 may be structured so as to retract according to the movement of the clamp arm 4 or the hopper 21 so as not to interfere with them.

[0021] Next, the operation of the above-mentioned configuration will be described. In the above-mentioned configuration, when the circular rotor 5 rotates intermittently and transfers the gusset bag G to the filling section SJ, the pair of suction cups 22 suck the upper center of the bag mouth Gb and then move in a direction away from each other to open the gusset bag G. Then, high-pressure air is sprayed from the spray nozzle 23 toward the folded-in portion Ga of the bag mouth Gb, and as shown in Figs. 1, 4, and 5, the folded-in portion Ga of the gusset bag G is brought toward one inner side of the bag mouth Gb. In this state, the hopper 21 descends and the tip of the hopper 21 is inserted into the bag mouth Gb. At the same time, the spray of high-pressure air from the spray nozzle 23 stops. In this way, the folded-in portion Ga of the gusset bag G is brought toward one inner side of the bag mouth Gb, so that the folded-in portion Ga does not come into contact with the tip of the hopper 21 as shown in Fig. 6. Therefore, the folded-in portion Ga and the bag mouth Gb of the gusset bag G are not deformed or damaged by the tip of the hopper 21. Thereafter, the article to be packaged is filled into the gusset bag G through the hopper 21. After the article to be packaged is filled, the tip ends of the pair of left and right clamp arms 4 are opened to close the bag mouth Gb of the gusset bag G. Thereafter, the circular rotor 5 rotates intermittently to transfer the gusset bag G to the next section.

[0022] According to the above configuration, when the bag mouth Gb is opened, high-pressure air is simply sprayed onto the folded portion Ga, eliminating the need for a heat-sealing process. In other words, when a heat-sealing process is required as in the past, heat-sealing must be performed in a separate section beforehand, reducing the efficiency of the packaging process. In contrast, according to the present configuration, heat-sealing in a separate section is not required, improving the speed of the packaging process. In addition, it is no longer necessary to change the temperature setting of the heat sealer to correspond to the material and thickness of the packaging material when the type of product to be packaged changes, or to strictly manage the temperature of the heat sealer for heat-sealing during continued packaging work.

[0023] In addition, in the above embodiment, an example was described in which the bag mouth Gb was opened in the filling section SJ, but the bag mouth Gb may be opened in advance in a section preceding the filling section SJ, and while maintaining this open state, the circular rotor 5 may be rotated intermittently to transport the bag mouth Gb to the filling section SJ, and high-pressure air may be sprayed onto the folding section Ga. [Industrial Applicability]

[0024] The bag filling and filling apparatus of the present invention has been described as being used in a rotary type packaging apparatus, but it can also be used in linear packaging apparatus and elliptical packaging apparatus other than the rotary type packaging apparatus, and is useful in this technical field. [Explanation of symbols]

[0025] 1 Rotary type packaging device 3 Clamp (clamping mechanism) 3A Tip side claw 4 Clamp Arm 4A axis 4B Lola 5 Circular rotor 10. Bag filling equipment 11 Air cylinder 11a Rod 12 Link mechanism 13 Roller pin 14 Movable rod 21 Hopper 21a tip 22 Suction cup (opening means) 23 Injection nozzle (injection means) 24 Suction tube 25 Mounting arm 31 Post 32 Lifting rod 33 Bracket 90 Clamp (clamping mechanism) 91 Sucker 92 Hopper G Gusseted Bag Ga Fold-in part (gusset part) Gb bag mouth SJ Filling Section

Claims

1. A bagging and filling device for filling a gusset bag by inserting the tip of a hopper into the opening of the gusset bag, comprising: an opening means for opening the opening of the gusset bag; a hopper for inserting into the opened gusset bag to dispense the packaged material; and an injection means for injecting air into the folded portion of the opening of the gusset bag to retract the tip of the hopper to a retracted position where it does not come into contact with the folded portion.

2. The bagging and filling apparatus according to Claim 1, wherein the spraying means is a spray nozzle for spraying air, and is attached at an inclination downward to both ends of a mounting arm attached to the suction tube of the suction cup of the opening means.

3. The bagging and filling apparatus according to claim 2, characterized in that the angle of the spray nozzle can be freely changed according to the type of gusset bag, and the two spray nozzles are mounted to spray air in the same direction or in opposite directions.

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