Bag opening device and bag opening method

Abstract

To provide a bag opening device and a bag opening method that can be used for packaging a various articles with a simple configuration.SOLUTION: A bag opening device is constituted of: a fulcrum 1 having a substantially rectangular plane and having a rotating shaft 2 provided in the substantially center thereof; a suction device 8 having a tubular member 6 having one end joined to the rotating shaft 2 and having a suction cup 7 at the other end; a bag holding member 4 arranged on one side of the rotating shaft 2; and a bag temporary retaining plate 9 arranged on the other side, wherein a bag piece 5b at a top part the bags stacked on the bag holding member 4 is sucked by the suction cup 7, the suction device 8 in which the bag piece 5b is sucked by the suction cup 7 is rotated in a direction of a bag temporary retaining plate 9 by using a handle 3 joined to the rotating shaft 2 and is stopped, and air is blown from air blowing means 10 arranged on an upper part of the bag temporary retaining plate 9 onto an opening 5c of the bag piece 5b so as to open and expand the opening of the bag.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a device for opening and widening the opening of a packaging bag to facilitate insertion of contents, and a method for widening the bag opening using said device. [Background technology]

[0002] In recent years, most retail stores sell products in fixed quantities stored in storage bags. These storage bags are made of sheets or films of organic polymer materials such as polyethylene, which have characteristics such as allowing the contents to be visually confirmed, having a certain degree of strength, and being inexpensive.

[0003] Polyethylene bags for such purposes are supplied in a folded and stacked state, but because the polyethylene sheets that make up the bags have extremely smooth surfaces, when stored in a stacked state the surfaces of the sheets stick together and there is very little surface friction, making it difficult to separate the individual bag pieces and open the separated bags by hand.

[0004] As a technique for dealing with such problems, Patent Document 1 discloses a bag manufacturing method that uses a roller device that alternates between sharp protruding rings and flat rubber rings to apply anti-slip unevenness to both sides of the opening of a polyethylene bag for carrying. However, the technique disclosed therein is intended for so-called plastic shopping bags that have handles, and does not necessarily address the above-mentioned problems.

[0005] Patent Document 2 discloses a continuous bag opening device in which a plurality of equally spaced opening means travel in one direction at a constant speed along a circular track having a straight section, and continuously open bags conveyed at the same speed along the straight section of the circular track, the opening means each having a vacuum suction cup that rises and falls and an air ejection nozzle that opens and closes, and the vacuum suction cups suck both sides of the bag while traveling along the straight section, then open it, and the air ejection nozzle blows air into the bag. However, the device disclosed therein is large in size, and it is considered difficult to introduce it to anyone other than large companies and large retail stores, from a cost perspective. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Publication No. 8-290495 [Patent Document 2] JP 2001-278217 A Summary of the Invention [Problem to be solved by the invention]

[0007] SUMMARY OF THE PRESENT EMBODIMENT In order to solve the above problems, an object of the present invention is to provide a bag opening device and a bag opening method that have a simple configuration and are capable of handling packaging of various items. [Means for solving the problem]

[0008] The present inventors have conducted extensive research into a manually operable bag opening device in order to simplify the device configuration, and have come up with the present invention.

[0009] In order to solve the above problem, one aspect of the present invention provides a bag opening device comprising: a support base having an approximately rectangular plane; a rotating shaft attached to approximately the center of the support base parallel to one side of the support base; a suction device having a connection means for a suction means at one end of a tubular member and a suction cup connected to the suction means at the other end of the tubular member, the one end of the tubular member being joined to the rotating shaft so as to be rotatable around the rotating shaft; a handle joined to the rotating shaft for rotating the suction device; a bag holding member having a flat plate arranged approximately parallel to a plane including the rotating shaft and inclined to one side separated by the rotating shaft of the support base, and having the function of holding multiple bags stacked on top of each other on the surface on the rotating shaft side; a flat bag temporary retaining plate arranged at an angle to the other side separated by the rotating shaft of the support base; and an air blowing means provided at the upper end of the bag temporary retaining plate.

[0010] In order to solve the above problem, a bag opening device according to one aspect of the present invention is characterized in that a slit into which the suction device fits loosely is provided at a position on the bag temporary retaining plate where the suction device rotates to contact the bag temporary retaining plate.

[0011] In addition, a bag opening method according to one embodiment of the present invention for solving the above-mentioned problems includes using the bag opening device, with the opening side positioned at the top, rotating the suction device by operating the handle toward the bag holding member side where bags are stacked, and abutting the suction cup against the vicinity of the opening on the surface of the uppermost bag of the bags stacked on the bag holding member to adsorb the bag to the suction cup, rotating the suction device with the bag adsorbed to the suction cup by operating the handle, placing the bag on the surface of the bag temporary retaining plate, and blowing air discharged from the air blowing means into the opening of the bag, thereby opening the opening of the bag. Effect of the Invention

[0012] As described above, the bag opening device of the present invention can open the opening of a bag that is adsorbed to the suction cup of the suction device by air blown from a blower, and the suction device is moved between the bag holding member and the bag temporary retaining plate by a manual handle, so that the overall configuration of the device is simple and it can be used to bag a wide variety of items. [Brief description of the drawings]

[0013] [Figure 1] FIG. 1 is a front view of an example of a bag opening device according to the present invention; [Diagram 2] 1 is a side view of an example of a bag opening device according to the present invention; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Next, an embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a front view of an example of a bag opening device according to the present invention, and Fig. 2 is a side view of the example of the bag opening device according to the present invention.

[0015] 1, the bag opening device according to the present invention has a rotating shaft 2 disposed in a direction perpendicular to the paper surface, approximately in the center of a support base 1. The rotating shaft 2 can be operated by a handle 3 joined to the rotating shaft 2, and a tubular member 6 joined to the rotating shaft 2 can be rotated in the direction of the arrow indicated by a dashed line in the figure.

[0016] Moreover, the rotating shaft 2 shown in this example has a tubular shape with a hollow portion, and the hollow portion of the tubular member 6 and the rotating shaft 2 are in communication with each other. The suction cup 7 and the suction means 13 are in communication with each other via the connection means 12, and the suction cup 7 has the function of generating a suction force.

[0017] 1, and the suction cups 7 come into contact with the bag pieces 5b arranged on the surface of the bags 5a stacked on the bag holding member 4 at the position indicated by the two-dot chain line, whereby the bag pieces 5b are sucked onto the suction cups 7. The sucked bag pieces 5b are placed on the surface of the bag temporary retaining plate 9 by operating the handle 3, and when air indicated by the arrow from the air blower 10 is blown onto the openings 5c of the bag pieces 5b, one side of the sheet constituting the opening is fixed by the suction cups 7, so that the other side of the sheet moves and the opening is widened. Various items can be inserted into the bag pieces 5b with the openings 5c widened.

[0018] Furthermore, as shown in FIG. 2, in the example of the bag opening device shown here, a slit 11 into which the suction device 8 fits loosely is provided at approximately the center of the bag temporary retaining plate 9. By using such a structure, the bag piece 5b can be closely attached to the surface of the bag temporary retaining plate 9, and the opening of the bag piece 5b can be brought closer to the air outlet of the air blowing means 10, making it easier to expand the bag opening.

[0019] As described above, according to the present invention, it is possible to provide a bag opening device and opening method that can greatly improve the efficiency of the work of widening the opening of a bag made of a material such as polyethylene with a simple operation. Note that the present invention is not limited to the above-mentioned embodiment, and it goes without saying that the present invention includes design changes that do not deviate from the gist of the present invention, including various modifications and corrections that can be conceived by a person having ordinary knowledge in the field of the present invention. [Explanation of symbols]

[0020] 1 Support stand 2 Rotation shaft 3 Handle 4 Bag holding member 5a Stacked bags 5b Individual bags 5c Opening 6 Tubular member 7...Suction cup 8...Suction device 9...Bag retaining plate 10...Blower device 11 Slit 12 Connection means 13...Suction means

Claims

1. A support base having a substantially rectangular plane; A rotation shaft is attached to the approximate center of the support base and approximately parallel to one side of the support base; A tubular member having at one end a means for connecting to a suction means, and at the other end of said tubular member: a suction device including a suction cup connected to the suction means, the tubular member having one end joined to the rotation shaft so as to be rotatable about the rotation shaft; a handle connected to the rotating shaft for rotating the suction device; a bag holding member having a flat plate arranged substantially parallel to a plane including the rotation shaft in a state inclined to one side defined by the rotation shaft of the support base, and having a function of holding a plurality of bags stacked on a surface on the rotation shaft side; A flat bag temporary retaining plate arranged at an angle on the other side of the support base separated by the rotation shaft; a bag opening device comprising: a blowing means provided at an upper end of the bag temporary retaining plate;

2. 2. The bag opening device according to claim 1, wherein a slit into which the suction device fits loosely is provided in the bag temporary retaining plate at a position where the suction device rotates to contact the bag temporary retaining plate.

3. The suction device is rotated by operating the handle toward the bag holding member side where the bags are stacked with the opening portion disposed on the upper side, the suction cup is brought into contact with the surface of the uppermost bag of the bags stacked on the bag holding member in the vicinity of the opening thereof, and the bag is attracted to the suction cup; The suction device with the bag attached to the suction cup is rotated by operating the handle, and the bag is placed on the surface of the bag temporary retaining plate; 3. A bag opening method using the bag opening device according to claim 1 or 2, characterized in that the opening of the bag is opened by blowing air discharged from the air blowing means against the opening of the bag.

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