JP2005082221A - Bag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bag, the opening of which can be closed easily and firmly without preparing a string for banding separately. <P>SOLUTION: Since four bundling strips 2a to 2d and 3a to 3d opposing each other are provided on the opening parts of a bag 1a and 1b, the strips 2a to 2d and 3a to 3d can be banded each other. Complicating works in a conventional garbage bag such as preparing the string for banding separately or bundling to band the four corners of the opening parts are not needed and the opening parts can be closed easily and firmly. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a bag-like body, and more particularly to a bag-like body that can easily and reliably seal an opening without separately preparing a binding string.

  Conventionally, when closing the opening portion of the garbage bag, it has been common to bind the four corners of the opening portion in a string shape and bind the portions bundled in this string shape. However, such a method is not only troublesome, but the bundling portion is easy to unwind and the opening cannot be reliably sealed.

Therefore, by using a trash bag (Patent Document 1) with a string attached around the opening in advance, or by separately preparing a tying string and winding the tying bag opening with such a string to bind A method of sealing the opening has been considered.
JP 2001-206501 A

  However, in a garbage bag in which a string is attached to the opening in advance, the number of parts and the number of manufacturing steps are increased by the amount of the string, which increases the product cost of the entire garbage bag. In addition, in the method of sealing the opening with a separately prepared string, not only is the work of storing and preparing such a string complicated, but the string is easy to drop out of the opening, and the opening can be reliably sealed. There was a problem that it was not possible.

  The present invention has been made to solve the above-described problems, and provides a bag-like body capable of easily and reliably sealing an opening without separately preparing a binding string. It is an object.

  In order to achieve this object, a bag-like body according to claim 1 is formed by joining both end portions of a cylindrical sheet material to form a bottom portion, and cutting the sheet material in a width direction to open the sheet material. The knot is manufactured by forming a portion, and four knots facing each other are formed in the opening by cutting the sheet material into a concavo-convex shape in the width direction.

  A bag-like body according to a second aspect is the bag-like body according to the first aspect, wherein the cutting of the sheet material is performed by a high-pressure liquid ejected from a nozzle.

  The bag-like body according to claim 3 is the bag-like body according to claim 1 or 2, wherein the cut shape of the sheet material is on the imaginary line extending in the width direction through the approximate center of the sheet material. The widths of the protrusions or recesses at both ends in the width direction are approximately ½ of the widths of the other protrusions or recesses, and the widths of the other protrusions or recesses are substantially the same.

  The bag-like body according to claim 4 is the bag-like body according to any one of claims 1 to 3, wherein the cut shape of the sheet material is based on an imaginary line extending in the width direction through the approximate center of the sheet material. As described above, the height of the convex portion is substantially the same as the depth of the concave portion.

  According to the bag-like body according to claim 1, since four knots facing each other are formed in the opening, it is possible to bind these knots without separately preparing a string for bundling. There is an effect that the opening can be easily and reliably sealed. Moreover, since the bag-shaped body of the present invention is manufactured by joining both ends of a sheet material and cutting the substantially central portion of the sheet material, two bag-shaped bodies are formed from one sheet material. Can be obtained at a time, and as a result, the bag-like body can be efficiently produced.

  According to the bag-like body according to claim 2, in addition to the effect produced by the bag-like body according to claim 1, the cutting of the sheet material is performed by the high-pressure liquid ejected from the nozzle. For example, even when the sheet material is made of a resin material such as polyolefin, there is an effect that the sheet material can be cut with high accuracy and at high speed. Moreover, since heating of the sheet material during cutting can be suppressed, there is an effect that it is possible to suppress deterioration of physical properties of the sheet material due to heat.

  According to the bag-like body according to claim 3, in addition to the effect produced by the bag-like body according to claim 1 or 2, the cut shape of the sheet material is on an imaginary line extending in the width direction through the approximate center of the sheet material. The widths of the protrusions or recesses at both ends in the width direction of the sheet material are approximately ½ of the widths of the other protrusions or recesses, and the widths of the other protrusions or recesses are substantially the same. ing. That is, since the knots can be arranged at substantially equal intervals along the periphery of the opening, there is an effect that the entire opening can be evenly sealed.

  According to the bag-like body of claim 4, in addition to the effect produced by the bag-like body according to any one of claims 1 to 3, the cut shape of the sheet material passes through the approximate center of the sheet material in the width direction. Since the convex portion height is configured to be substantially the same as the concave portion depth on the basis of the extending virtual line, the storage portion depth of two bag-like bodies obtained from one sheet material, that is, the storage capacity Can be made substantially the same.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. 1A and 1B are perspective views of bags 1a and 1b in an embodiment of the present invention.

  The bags 1a and 1b are configured in a bag shape having an upper end opened from a resin material such as polyolefin, and are mainly used as a garbage bag. As will be described later, two of these bags 1a and 1b are manufactured from one sheet material 1 (see FIG. 2) at the same time. As shown in FIG. 2a-2d and 3a-3d are formed.

  Therefore, unlike the conventional garbage bag, there is no need to seal the opening by bundling the four corners of the opening in a string or by winding the opening with a separately prepared binding string. Etc., the openings can be easily and reliably sealed by binding the knots 2a to 2d and 3a to 3d.

  For example, in the case of the bag 1a, the knots 2a and 2c can be bound together, and the knots 2b and 2d can be bound together, so that the four knots 2a to 2d can be bound together with a sense of tying a furoshiki. As a result, the opening can be easily and reliably sealed. In the bag 1b, the same effect can be obtained by binding the knots 3a to 3d with the knots 3a and 3c and the knots 3b and 3d.

  Further, as shown in FIG. 1, the bags 1 a and 1 b are formed with tapered knots 2 k to 2 d and 3 a to 3 d. Therefore, the bundling work can be easily performed. Furthermore, the knots 2a to 2d and 3a to 3d are configured such that the root portion is wide and the distance between the adjacent knots 2a to 2d and 3a to 3d is narrow at the root portion. When these knots 2a to 2d and 3a to 3d are bound, the openings of the bags 1a and 1b can be sealed without gaps, and as a result, the stored items are prevented from dropping out. be able to.

  Then, with reference to FIG. 2, the manufacturing method of bag 1a, 1b is demonstrated. FIG. 2 is a front view of the sheet material 1.

  2 indicate imaginary lines H and L that pass through substantially the center position of the sheet material 1 and extend in the height direction (up and down direction in FIG. 2) or in the width direction (left and right direction in FIG. 2). The virtual line L corresponds to the virtual line according to claim 3 or 4. In addition, a solid line extending in a concavo-convex shape in the width direction in a substantially central portion of the sheet material 1 indicates a cutting line C that is a cutting position of the sheet material 1.

  In manufacturing the bags 1a and 1b, first, both end portions (upper and lower portions in FIG. 2) of the tubular sheet material 1 are joined to form the bottom portions 4 and 5, respectively. The bottom parts 4 and 5 are parts which become the bottoms of the bags 1a and 1b (see FIG. 1). In this embodiment, both ends are joined by heat fusion. However, the present invention is not necessarily limited to this. For example, the joining may be performed using an adhesive applied to the inner surfaces of both ends.

  After joining both end portions, the substantially central portion of the sheet material 1 is then cut along the cutting line C in the width direction (left and right direction in FIG. 2). Thereby, the sheet | seat material 1 is isolate | separated into the bags 1a and 1b, and the bags 1a and 1b provided with the four knots 2a-2d and 3a-3d can be manufactured (refer FIG. 1). Thus, since the two bags 1a and 1b can be obtained from one sheet material 1, the bags 1a and 1b can be efficiently manufactured, and the material is not wasted.

  Moreover, the bags 1a and 1b of the present invention can be manufactured from the sheet material 1 having the same size as the conventional one without requiring a separate material for forming the knots 2a to 2d and 3a to 3d. Therefore, it can be manufactured at the same material cost as a conventional garbage bag.

  That is, the conventional garbage bag is manufactured by cutting the sheet material 1 linearly along the virtual line L (that is, the virtual line L becomes the height of the conventional garbage bag). The bags 1a and 1b of the invention cut the sheet material 1 into a concavo-convex shape along the cutting line C. Therefore, the bags 1a and 1b of the present invention can be manufactured from the sheet material 1 having the same size as that of the conventional garbage bag, and the knots 2a to 2d and 3a to 3d are formed according to the size of the sheet material 1. You don't need to make it bigger.

  Here, the cutting line C is configured such that the sizes of the knots 2a to 2d and 3a to 3d are substantially the same as those of the other knots 2a to 2d and 3a to 3d. That is, since the cutting line C is arranged symmetrically with respect to the virtual line H, the widths of the knots 2a to 2d and 3a to 3d on the virtual line L are 2W as shown in FIG. Has been.

  Therefore, since the knots 2a to 2d and 3a to 3d can be arranged at substantially equal intervals along the periphery of the opening of the bags 1a and 1b (see FIG. 1), the knots 2a to 2d, By bundling 3a to 3d, the entire opening can be evenly sealed. As a result, by tightly binding the knots 2a to 2d and 3a to 3d, the bag-like material can be kept in a hermetically sealed state, and for example, the generation of a strange odor can be suppressed.

  In the present embodiment, since the cutting line C is arranged with reference to an imaginary line L passing through the approximate center of the sheet material 1, the two bags 1a and 1b manufactured from one sheet material 1 are arranged in substantially the same storage portion. It can be configured to a depth (storable amount) (see FIG. 1). However, the arrangement of the cutting line C is changed to the upper end side (upper side in FIG. 2) or the lower end side (lower side in FIG. 2), and the storage depth of one of the bags 1a and 1b is deepened (the amount that can be stored is large). In addition, it is naturally possible to configure the other storage portion to be shallow (less storage capacity can be reduced).

  Moreover, since each knot 2a-2d, 3a-3d is formed in the taper taper shape which has a predetermined | prescribed inclination angle, as shown in FIG. 2, these knots 2a-2d, 3a-3d Bundling work can be performed easily. Further, since the root portions of the knots 2a to 2d and 3a to 3d can be widened and the adjacent interval between the knots 2a to 2d and 3a to 3d can be narrowed at the root portions, these knots When 2a-2d and 3a-3d are bundled, the opening part of bag 1a, 1b can be sealed without gap, As a result, it can prevent that a stored item falls outside.

  In this embodiment, the tip widths of the knots 2a to 2d and 3a to 3d are set to W as shown in FIG. 2, but the tip width is not necessarily limited to this value. For example, it can be arbitrarily set within the range of 0 to 2W. However, the tip width is preferably in the range of W / 2 or more and 1.5 W or less, and more preferably W as in the present embodiment.

  Here, in the present embodiment, the tip widths of the knots 2a to 2d and 3a to 3d have been described as the width of the straight portion at the tip (inner spacing of the corner R portions provided on both sides of the tip). As a matter of course, it is possible to apply the range of the tip width (0 to 2 W or the like) with the width including the R portion as the tip width of each of the knots 2a to 2d and 3a to 3d. It should be noted that the radius dimension of the corner R portion is arbitrary, and it is naturally possible not to provide such a corner R portion.

  Here, in this embodiment, the sheet material 1 is cut by a so-called water jet (high-pressure water sprayed from a nozzle). Therefore, even when the sheet material 1 is made of a resin material such as a viscous polyolefin, the sheet material 1 can be cut with high accuracy and high speed. Moreover, since it can suppress the heating of the sheet | seat material 1 during a cutting | disconnection using a water jet, it can suppress that the physical property of the sheet | seat material 1 deteriorates with a heat | fever.

  The liquid ejected from the nozzle is not limited to water, and other liquids can naturally be used. For example, oil or the like may be used. It is naturally possible to cut the sheet material 1 using a blade such as a cutter or a laser cutting machine.

  Returning to FIG. 1, a method for sealing the openings of the bags 1a and 1b will be described. Various methods can be considered for the method of sealing the opening, and the method is not particularly limited to one method.

  For example, in the case of the bag 1a, the knots 2a to 2d may be crossed and bound (that is, the knot 2a and the knot 2c are bound, and the knot 2b and the knot 2d are bound). Alternatively, the knots 2a to 2d may be bundled in parallel (that is, the knot 2a and the knot 2d are tied, and the knot 2b and the knot 2c are tied).

  Further, the binding position may be the root part of the knots 2a to 2d or the tip part. By setting the binding position to the tip of the knots 2a to 2d, the knots 2a to 2d can be used as a handle for the bag 1a. Further, the number of times of binding may be one time or may be two times or more. Further, the bundling method may be a frame knot, butterfly knot, or another method. The same applies to the bag 1b, and the description thereof is omitted.

  As described above, according to the bags 1a and 1b of the present embodiment, since the four knots 2a to 2d and 3a to 3d facing each other are provided in the opening, these knots 2a to 2d and 3a to 3d are provided. Are tied with knots 2a, 2c and knots 3a, 3c, respectively, and tied with knots 2b, 2d, knots 3b, 3d, respectively, so that four knots 2a-2d, 3a-3d Can be united with the sense of tying. Therefore, unlike the conventional garbage bag, the opening can be sealed easily and securely without the need for complicated work such as preparing a binding string separately or bundling the four corners of the opening. It can be done.

  The present invention has been described based on the embodiments. However, the present invention is not limited to the above embodiments, and various modifications can be easily made without departing from the spirit of the present invention. It is guessed.

  For example, in the present embodiment, the case where the sheet material 1 (bags 1a and 1b) is made of a resin material such as polyolefin has been described. However, the material is not necessarily limited to this material, and may be made of other materials. Of course it is possible. For example, cloth, paper, an aluminum sheet, etc. are illustrated.

  In the present embodiment, the case where the bags 1a and 1b are used as garbage bags has been described. However, the present invention is not necessarily limited to this, and can naturally be used for other purposes. Examples thereof include use as a food storage bag and use as a packaging bag (wrapping bag) for wrapping gifts.

  Further, in the present embodiment, the size of the sheet material 1 (bags 1a and 1b) was not particularly described, but the sheet material 1 (bags 1a and 1b) is, for example, a size of about 10 cm in height × about 5 cm in width. Depending on the application, it can be configured in various sizes up to a size of about 2 m in height × 1 m in width.

(A) And (b) is a perspective view of the bag in one Example of this invention. It is a front view of a sheet material.

Explanation of symbols

1 Sheet material 1a, 1b Bag (bag-like body)
2a-2d Knots 3a-3d Knots 4,5 Bottom C Cutting line H, L Virtual line W Knott width (width of convex part or concave part)

Claims (4)

A bag-like body manufactured by joining both ends of a sheet material formed into a cylindrical shape to form the bottom, and cutting the sheet material in the width direction to form an opening,
By cutting the sheet material into a concavo-convex shape in the width direction, four knots facing each other are formed in the opening. The bag-like body according to claim 1, wherein the sheet material is cut by a high-pressure liquid ejected from a nozzle. The cut shape of the sheet material is an imaginary line extending in the width direction passing through the approximate center of the sheet material, and the width of the convex portions or concave portions at both ends in the width direction of the sheet material is substantially the same as the width of the other convex portions or concave portions. The bag-like body according to claim 1 or 2, wherein the other convex portions or the concave portions have substantially the same width. The cutting shape of the sheet material is configured such that the height of the convex portion is substantially the same as the depth of the concave portion with reference to an imaginary line extending in the width direction through the approximate center of the sheet material. Item 4. The bag-like body according to any one of Items 1 to 3.

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