JP2005193963A - Packaging bag, and its opening device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air-permeable packaging bag of which the automatic packaging is possible, and to provide an opening device for a packaging machine which corresponds to the packaging bag. <P>SOLUTION: (α) This packaging bag 1 is constituted into a flat bag configuration by properly bonding the peripheral edge section excepting a bag mouth 2 or the bag mouth 2 and a bottom section 4 by superposing a sheet material having air-permeability. On flat surface sections 1a and 1b facing each other within a bonding planned range of the bag mouth 1, small holes 5 and 6 in which pushing rods 29 and 38 for opening of the packaging machine can be inserted are alternately provided by placing a proper interval. (β) This opening device 20 for the packaging machine uses the above mentioned packaging bag, and the pushing rods 29 and 38 for opening are respectively freely insertably provided for the small holes 5 and 6 on the packaging bag 1 being supported under a suspended state by a grip pair g. The packaging bag 1 is constituted in such a manner that the bag mouth 2 of the packaging bag 1 is opened by advancing the pushing rods 29 and 38 for opening which are inserted in respective small holes to specified positions. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a breathable packaging bag used in a packaging machine and an opening device of the packaging machine.

  Small packaging bags having air permeability such as non-woven fabric are used for green tea, barley tea packs, etc., and these packaging bags are automatically packaged by a vertical pillow packaging machine. On the other hand, large-sized packaging bags having air permeability such as dashi packs exceed the scope of application of normal vertical pillow packaging machines, and are therefore mainly packaged manually. Although a large packaging bag can be packaged by a vertical pillow packaging machine, there is a problem that the manufacturing cost is high because a dedicated molding machine must be prepared for each bag size.

  Also, if a large packaging bag with air permeability is packaged by a rotary packaging machine, the bag mouth is adsorbed from both sides by a suction cup provided in a conventional opening device, so that it can be reliably adsorbed even if it is opened. Therefore, automatic packaging by a packaging machine equipped with the opening device has been considered difficult.

  Japanese Patent Application Laid-Open No. 2002-128025 discloses an opening device including a suction cup for opening a bag mouth and a nozzle for blowing air into a bag opened by the suction cup.

Japanese Patent Application Laid-Open No. 7-52960 discloses a packaging bag using a nonwoven fabric in which a resin film is disposed on the opening side of the surface to reinforce the opening and facilitate opening of the bag with air. This packaging bag is suitable for packaging products that require air permeability, such as vegetables and fruits, and is configured to be sealed using an adhesive or an adhesive tape. However, this packaging bag is not entirely formed of a breathable sheet material, and is not configured to be suitable for cooking such as dashi pack.
JP 2002-128025 A JP 7-52960 A

  An object of the present invention is to provide a breathable packaging bag that enables automatic packaging, and an opening device of a packaging machine corresponding to the packaging bag.

  In order to achieve the above object, the invention described in claim 1 is configured in a flat bag shape by superimposing a breathable sheet material and appropriately joining the bag mouth or the peripheral edge except the bag mouth and the bottom. It is a packaging bag, Comprising: The small hole which can insert the pushing stick | rod for opening of a packaging machine was alternately drilled in the plane part which opposes in the joining plan range of the said bag opening at intervals suitably.

  In order to achieve the same object, the invention described in claim 2 is the packaging bag according to claim 1, characterized in that the sheet material is a non-woven fabric or paper having air permeability.

  In order to achieve the same object, the invention described in claim 3 is an opening device of a packaging machine using a packaging bag having air permeability, and for the packaging bag, a sheet material having air permeability is overlapped. A small hole into which a push bar for opening can be inserted in a flat bag shape by appropriately joining the bag mouth or the peripheral edge except the bag mouth and the bottom portion, and being provided in a flat bag shape. The opening push rods can be inserted into the small holes of the packaging bag supported in a suspended manner by the grip pairs, and the openings are inserted into the small holes. It is characterized in that the bag mouth of the packaging bag is opened by moving the push bar forward to a predetermined position.

  In order to achieve the same object, the invention described in claim 4 is the opening device of the packaging machine according to claim 3, wherein the sheet material is a non-woven fabric or paper having air permeability. It is.

(Invention of Claim 1)
Since this packaging bag uses a breathable sheet material, the opening operation of the bag mouth by the opening device of the packaging machine can be stably performed, which contributes to automation of the packaging operation.

(Invention of Claim 2)
Since this packaging bag uses a non-woven fabric or a paper sheet material having air permeability, it has good permeability and is suitable for boiled dishes such as dashi packs.

(Invention of Claim 3)
The opening device of the packaging machine can reliably and stably perform the opening operation of the packaging bag using the air-permeable sheet material, and can automate the packaging operation and improve the productivity.

(Invention of Claim 4)
The opening device of this packaging machine can reliably and stably perform the opening operation of the bag opening of the packaging bag using a nonwoven fabric or paper sheet material suitable for cooking such as dashi pack.

  The best mode of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of the packaging bag, and FIG. 2 is an explanatory view showing the opening operation of the packaging bag by the opening device of the packaging machine.

  A packaging bag 1 according to the invention of claim 1 is shown in FIG. The packaging bag 1 is flat by joining the sheet material having air permeability such as nonwoven fabric or paper and joining the peripheral edges of the left and right vertical edges 3 and 3 and the bottom 4 except for the bag mouth 2 by heat sealing. It is provided in the form of a rectangular bag.

  The packaging bag can be formed into a bag shape in which the sheet material is folded in two, but in this case, the bottom edge of the folded portion need not be heat-sealed.

  At the center of the opposing flat portions 1a and 1b in the planned joining range of the bag mouth 2 (the range surrounded by the two-dot chain line in the figure), the tip portions of the push rods 29 and 38 for opening of the opening device 20 to be described later Small holes 5 and 6 sized so that 29a and 38a can be inserted are alternately formed at appropriate intervals.

  FIG. 2 shows an opening device 20 of a packaging machine according to the invention of claim 2. The opening device 20 is sent from a bag supply device to a grip pair (not shown) in the bag supply process and opens the bag mouth 2 of the packaging bag 1 supported in a suspended manner by the grip pair. . Reference numeral 21 denotes a hollow column erected on a base of a packaging machine (not shown). A bracket 22 to which a pair of parallel horizontal shafts 23 and 24 are fixed is attached to the upper end of the column 1. A bifurcated lever 25 and a long lever 30 are attached to one horizontal shaft 23, a short lever 27 and a lever 31 are sequentially attached to the other horizontal shaft 24, and a nut 33 and a nut are attached to both ends of the shaft via stays 32. 34 are respectively screwed. The arm 25 b provided integrally with the downward arm 25 a of the bifurcated lever 25 and the upper end 31 a of the lever 31 are connected by a pin 35.

  A link member 28 is attached to the lower ends of the pair of bifurcated lever 25 and short lever 27 so that a substantially U-shaped push rod 29 protrudes in the horizontal direction at the front end of the link member 28. Provided. Similarly, a link member 37 is attached to the lower end of the other pair of long lever 30 and lever 31, and a substantially L-shaped push rod 38 is provided at the front end of the link member 37 so as to protrude in the horizontal direction. ing. The distal end portion 29a of the push rod 29 and the distal end portion 38a of the push rod 38 are arranged in parallel, and the interval between them is provided so as to correspond to the interval between the small holes 5 and 6 of the packaging bag 1. ing.

  Reference numeral 41 denotes a cam lever that performs a swinging motion by a disc cam 40 whose rotation is controlled by a drive control unit of the packaging machine. The cam lever 41 is fixed to a rotary shaft 42 provided below the machine base, and a cam follower 43 attached to one arm 41 a is brought into contact with the outer peripheral surface 40 a of the disc cam 40. The cam follower 43 is provided so as not to float from the outer peripheral surface 40a by a tension spring 44 having one end attached to the other arm 41b.

  One end 45a of a rod 45 passing through the support column 1 is connected to the other arm 41b. A lateral arm 25 c of the bifurcated lever 25 is connected to the other end 45 b of the rod 45 via a bolt member 46.

  Thus, the cam lever 41 is swung by the rotational operation of the disc cam 40, the rod 45 is moved upward or downward, and the bifurcated lever 25 and the lever 31 are interlocked to thereby move the tip of the push rod 29. The opening device 20 of the packaging machine is configured in which the portion 29a and the tip end portion 38a of the push rod 38 can be moved back and forth in opposite directions.

  A packaging machine to which the opening device 20 is applied is a known rotary packaging machine. In this type of packaging machine, a rotating body provided with a large number of grip pairs in a radial direction is intermittently stopped and moved for each station by intermittent drive means, and each grip pair is suspended in a bag-up state. A package bag to be supported is filled with an article to be packaged at a filling station, and the bag mouth is heat-sealed at a top seal station, and then the packaging bag is discharged.

Next, the operation of the opening device 20 of the packaging machine having such a configuration will be described.
The rotation of the disc cam 40 is controlled by the drive control unit of the packaging machine. The rotation of the disc cam 40 causes the rod 45 to move upward via the cam lever 41, and the bifurcated lever 25 and the lever 31. And move inward. Thereby, the front-end | tip part 29a of the push rod 29 and the front-end | tip part 38a of the push rod 38 are each inserted in the small holes 5 and 6 of the packaging bag 1 supported by the grip pair g by suspension, and further to a predetermined position. The bag mouth 2 is opened by moving forward.

  The corresponding interval between the grip pairs g is controlled so as to be moved inward in synchronism with the opening operation of the bag mouth so as to reduce the interval.

Since the disc cam 40 continues to rotate even after the opening of the bag mouth 2 is provided, the rod 45 moves downward, and the bifurcated lever 25 and lever 31 move outward. Thereby, the front-end | tip part 29a of the push bar 29 and the front-end | tip part 38a of the push bar 38 each escape from the small holes 5 and 6 of the packaging bag 1, and return to the original position.
Thus, in the opening device 20 of the packaging machine, a series of opening operations are repeatedly performed for each packaging bag intermittently stopped in the opening process.

  As described above, the packaging bag according to the first aspect of the invention uses a sheet material having air permeability, so that the opening operation of the bag mouth by the opening device of the packaging machine can be stably performed. In addition, the opening device of the packaging machine according to the second aspect of the invention has an advantage that the opening operation of the packaging bag using a sheet material having air permeability can be reliably and stably performed.

Front view of packaging bag Explanatory drawing which shows opening operation of the packaging bag by the opening device of the packaging machine

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Packaging bag 1a, 1b ... Plane part 2 ... Bag mouth 5,6 ... Small hole 20 ... Opening device 21 ... Support | pillar 29, 38 ... Push rod 29a for opening, 38a ... tip 40 ... disc cam 41 ... cam lever 45 ... rod

Claims (4)

It is a packaging bag configured in a flat bag shape by appropriately joining the periphery of the bag mouth or the bag mouth and the bottom by overlapping the sheet material having air permeability,
A packaging bag characterized in that small holes into which opening push rods of a packaging machine can be inserted are alternately formed at appropriate intervals in opposing planar portions within a predetermined range of joining of the bag mouth.   The packaging bag according to claim 1, wherein the sheet material is a non-woven fabric or paper having air permeability. An opening device for a packaging machine using a packaging bag having air permeability,
The packaging bag is provided in the form of a flat bag by overlapping the sheet material having air permeability and joining the bag mouth or the peripheral edge except the bag mouth and the bottom as appropriate, and within the intended joining range of the bag mouth. In the plane portions facing each other, small holes into which the push rods for opening can be inserted are alternately formed at appropriate intervals,
The opening push rods are respectively inserted into the small holes of the packaging bag supported in a suspended manner by the grip pairs, and the opening push rods inserted into the small holes are moved forward to a predetermined position. An opening device for a packaging machine, wherein a bag mouth of a packaging bag is opened. The opening device for a packaging machine according to claim 3, wherein the sheet material is a non-woven fabric or paper having air permeability.

Images