JP2022175392A - extraction bag - Google Patents

Abstract

To provide an extraction bag which opens an opening in a true circle or a close state to it by a simple operation of pulling up a pair of holders and locking them to an edge of a cup, and stably maintains the open state.SOLUTION: A notch is formed in a holder as a weak rigid part. The notch 35 is pulled outward to escape. At this time, a vicinity area of the notch is dragged along with a surface part 3a of a bag body 3, the surface part bulges outward in a convex curve shape centered on the notch. When the holder is displaced laterally outward from the center of the holder, a force is applied in a direction crossing a direction in which fingers are pulled, a thick belt-shaped part is positioned there, and the notch 43 is formed to extend in an oblique direction, so it escapes in the same manner as the notch. Therefore, the surface part 3a swells in the convex curve shape centering on the notch. An opening edge 7 of the bag body is substantially circular, and this open state is maintained.SELECTED DRAWING: Figure 4

Description

The present invention relates to a brewing bag for coffee powder, tea leaves, etc., and more particularly to a brewing bag comprising a bag body and a holder attached to the bag body.

An extraction bag comprising a bag body made of a water-permeable material containing coffee grounds, tea leaves, etc. and a pair of holders made of cardboard fixed to the surface of the bag body is widely used. is described in Patent Document 1, for example.
When using this extraction bag, the upper end of the bag body is torn off to form an opening. Next, the pair of holders are pulled up and engaged with the rim of the cup, so that the bag body is supported on the cup. In this state, a portion of the bag body and a portion of the holder enter the cup, and the portion of the bag body near the opening is supported by a pair of holders to keep the opening open. After this state is established, extraction liquid such as hot water is poured through the opening for extraction.

By the way, in Patent Document 1, the holder has a portion extending in the left-right direction along the edge of the opening to maintain the opening of the bag main body in a large state.

JP 2010-110335 A

However, in that case, the opening of the bag body becomes square.
When extracting coffee grounds, hot water is poured from the center of the opening to the outside in a "no" shape, so that the hot water spreads evenly over the entire coffee grounds and swells into a round shape for steaming. A large amount of unextracted coffee grounds remain in the corners of the cup, resulting in uneven extraction. Therefore, it is desirable to make the opening a perfect circle or a state close to it.
In addition, in response to the demand for convenience, the opening can be opened in a perfect circle or in a nearly circular state by a simple operation of raising the pair of holders and engaging them with the rim of the cup, and the open state can be stably maintained. want to keep

The present invention has been devised in view of the above-mentioned conventional problems, and the opening can be opened in a perfect circle or in a state close to it by a simple operation of pulling up the pair of holders and engaging them with the rim of the cup. , and to provide a novel and useful extraction bag capable of stably maintaining its open state.

The present invention has been made to solve the above-mentioned problems, and the invention of claim 1 consists of a flat bag-shaped bag body made of a water-permeable material, and a container such as a cup fixed to both surfaces of the bag body. The extraction bag comprises a pair of holders that engage with each other, the upper end of the bag body is broken to form an opening, and the extraction liquid is poured through the opening, wherein the holder is formed of a rigid thin plate. , an upper reinforcing portion adhered to the edge of the opening, and a locking portion provided below the upper reinforcing portion, the upper reinforcing portion having a symmetrical convex shape on the upper edge. , a vertical main weak rigidity portion extending straight downward from the top of the upper edge halfway to the lower edge; A pair of obliquely weakly rigid portions extending halfway to the rim is provided, and when the locking portions of the pair of holders are lifted from the surface and locked to the rim of the container, the weakly rigid portions are formed. The extraction bag is characterized in that the opening edge is opened in a perfect circle shape or a nearly circular shape by pulling the parts outward together.
The invention according to claim 2 is the brewing bag according to claim 1, wherein the pair of obliquely weakly rigid parts of the upper reinforcing part are positioned substantially perpendicular to the tangential line of the upper edge from positions respectively lowered in the lateral direction of the upper edge. The brewing bag is characterized by extending obliquely downward while

According to a third aspect of the present invention, there is provided a bag for extraction according to the first or second aspect, wherein the upper edge of the upper reinforcing portion is formed with gradually decreasing edges on both left and right sides of the top portion. A brewing bag, characterized in that a pair of vertically reinforcing rigid parts extending straight downward from the upper edge halfway to the lower edge with a main vertically weak rigid part interposed therebetween are provided on the irregular edge. is.

The invention of claim 4 is the extraction bag according to any one of claims 1 to 3,
The brewing bag is characterized in that the upper edge of the upper reinforcing part extends from the top part to 45° on both left and right sides thereof.

The invention of claim 5 is the extraction bag according to any one of claims 1 to 4,
The brewing bag is characterized in that the upper reinforcing part has an arc-like shape.

According to a sixth aspect of the present invention, in the brewing bag according to the fifth aspect, the left and right sides of the upper reinforcement portion are further connected outward in the left and right direction to form an outer reinforcement portion that has an arc-like shape as a whole, The brewing bag is characterized in that when the holder is overlaid on the bag body, the outer edge of the holder constitutes part of the contour of the holder.

According to a seventh aspect of the present invention, there is provided the extraction bag according to the sixth aspect, wherein the outer reinforcing portion is band-shaped, and a central reinforcing portion is provided which extends vertically and continues below the center of the outer reinforcing portion in the lateral direction. The extraction bag is characterized in that it is attached to the main body of the bag.

The invention according to claim 8 is the extraction bag according to claim 7, characterized in that the upper reinforcing part has a thick belt-like part with a large width, and is provided with an obliquely weakly rigid part. It is an extraction bag.

According to a ninth aspect of the invention, there is provided the extraction bag according to the seventh or eighth aspect, wherein the holder is formed by a single rigid thin plate connected to each other, and the locking portion has a base end extending from the lower side of the central reinforcing portion. The extraction bag is characterized by extending upward from both left and right sides, bending on the upper side, turning around to the left and right outward, respectively, and continuing on the lower side, and is raised in an inverted V shape.

According to a tenth aspect of the invention, there is provided the extraction bag according to the ninth aspect, wherein the locking portion is separated from the outer reinforcing portion and the central reinforcing portion by a slit-like cut so that it can be raised. It is an extraction bag that

The invention according to claim 11 is the extraction bag according to any one of claims 1 to 10, wherein the weakly rigid portion is formed by a slit-shaped or V-shaped or U-shaped cut in the rigid thin plate of the holder. An extraction bag characterized by

According to the brewing bag of the present invention, the opening can be opened in a perfect circle or a nearly circular shape by a simple operation of pulling up the pair of holders and engaging with the rim of the cup, and the open state can be stably maintained. can be maintained.

1 is a plan view of an extraction bag according to an embodiment of the present invention before being opened; FIG. FIG. 2 is a view of a reinforcing portion extracted from the holder of FIG. 1; FIG. 2 is a perspective view of the extraction bag of FIG. 1 after opening; FIG. 2 is a perspective view of a state in which the extraction bag of FIG. 1 is set in a cup; FIG. 5 is an image diagram of the open state of FIG. 4;

An extraction bag 1 according to an embodiment of the present invention will be described with reference to the drawings.
In FIGS. 1 and 2, reference numeral 3 denotes a bag body, and the bag body 3 is made of a water-permeable material such as polyethylene fiber non-woven fabric. The bag body 3 is formed by folding a rectangular sheet in two to form a folded portion, and sealing three sides other than the lower side where the folded portion is formed to form a rectangular flat bag. A perforation 5 is provided in the upper part of the bag body 3 as an easy-to-break part in parallel with the upper edge part. When the upper end side is broken at the perforation 5 and opened, the bag body 3 is opened as shown in FIG. Therefore, the opening edge 7 is formed where the perforation 5 was.
Coffee powder (not shown) is enclosed in the bag body 3 .

A pair of holders 9, 9 are fixed to both surface portions 3a, 3a of the bag body 3, respectively. This holder 9 is composed of a single rigid thin plate. Materials for the rigid thin plate include paper, plastic, etc. In this embodiment, cardboard is used. The outer contour of the holder 9 is formed by punching, and the inside of the holder 9 is separated by slit-like cuts to form a plurality of portions. Therefore, there is no planar defect in the cardboard on the inside. Also, the parts are connected to each other.
The holder 9 is bilaterally symmetrical and is fixed below the perforations 5 with its center line (L) aligned with the lateral center line of the surface portion 3a of the bag body 3 .
The configuration of each part of the holder 9 will be described below.

Reference numeral 11 indicates an outer reinforcing portion. The outer reinforcing portion 11 has an outer edge 13 extending from the lower left side to the upper side to the lower right side to form an arc-like shape of more than 3/4. A convex upper edge 13a is formed between the top of the outer edge 13 and the range of the left and right α (=45°). The apex of the upper edge 13a and the vicinity thereof form a gradually changing edge 13b that descends more gradually than the outer side in the left-right direction, that is, has a large radius of curvature.
The outer reinforcing portion 11 is formed in a curved strip shape on both left and right sides, and inner edges 15 and 15 are formed in substantially similar shapes to the outer edge 13 . The outer edge 13 and the inner edge 15 are connected via an outwardly convex curved edge 17 . Of the inner edges 15, 15, the lower edges 15a, 15a are formed by those positioned inside the upper edge 13a in a similar shape.

An upper reinforcing portion 19 extending in the left-right direction along the opening edge 7 and having both ends lowered is formed in a portion of the outer reinforcing portion 11 having an upper edge 13a and lower edges 15a, 15a as upper and lower edges. ing. A central reinforcing portion 21 extending vertically is continuous from below the center of the upper reinforcing portion 19 in the horizontal direction. That is, the lower edges 15a, 15a of the upper reinforcing portion 19 are divided by the central reinforcing portion 21. As shown in FIG.
The central reinforcing part 21 is tapered halfway downward, and further constricted there to become thicker downward. Therefore, the portion connecting the upper reinforcing portion 19 to the central reinforcing portion 21 forms an inverted triangular region 23 having a certain area in the shape of an inverted triangle. Further, the lower edge 15a of the upper reinforcing portion 19 and the vertical edge 21a of the central reinforcing portion 21 are continuous to form a concave curve. Further, on the left and right outer sides of the gradually changing edge 13b, there is a thick belt-like portion 25 whose width dimension is slightly increased.
The outer reinforcing portion 11 and the central reinforcing portion 21 are adhered to the bag body 3 over the entire surface including their boundaries.

The lower end portion of the central reinforcing portion 21 extends in the left-right direction to form an inverted T shape, and engaging portions 27 are connected to the right and left protruding portions. The locking portion 27 is composed of a pair of arm pieces 29 , 29 , a pair of locking pieces 31 , 31 and a knob portion 33 .
The engaging portion 27 has a serpentine belt shape, and one end thereof is connected to the left extension portion 21b of the lower end portion of the central reinforcing portion 21, extends upward, changes direction, turns left outward, and downward. After extending in the vertical direction, it further changes its direction and extends laterally to the right, exceeding the center line (L) in the horizontal direction. The right side also has a symmetrical shape, and the other end continues to the right extended portion 21 c of the lower end portion of the central reinforcing portion 21 . The portions extending upward from the left and right extension portions 21b and 21c at the lower end of the central reinforcing portion 21 correspond to the arm pieces 29 and 29, respectively, and the portions extending downward around the left and right outwards serve as the locking portions. A portion corresponding to the pieces 31 , 31 and continuous in the horizontal direction corresponds to the knob portion 33 .

An arm piece 29 and a locking piece 31 are inserted between the central reinforcing portion 21 and the outer reinforcing portion 11, and are separated from each other by slit-like cuts. Therefore, when the holder 9 is overlaid on the surface portion 3a of the bag main body 3, the outer reinforcing portion 11 is configured by the outer edge 13, the convex curved edges 17, 17, and the outer edge 33a of the knob portion 33 to form the outer contour of the holder 9. there is Also, with the above configuration, the locking portion 27 is positioned below the upper reinforcing portion 19 .
Since the engaging portion 27 is not adhered to the surface portion 3a of the bag body 3, when the grip portions 33, 33 of the respective holders 9, 9 are pinched with fingers and pulled outward, as shown in FIG. Then, the locking piece 31 and the arm piece 29 are pulled up, and the arm piece 29 and the locking piece 31 open in an inverted V shape.

The holder 9 is configured as described above, and the weakly rigid portion is formed by a slit-like cut.
Reference numeral 35 denotes a cut that constitutes the main weakly rigid portion in the vertical direction, and this cut 35 extends straight downward from the top of the upper edge 13a. That is, it extends toward the lower apex angle of the inverted triangular region 23 . A deep end 35a of the notch 35 is located very close to the imaginary line (A) that smoothly connects the lower edges 15a and 15a, and the wide central reinforcing portion 21 faces from below.
A tangent line of the upper edge 13a straddling the notch 35 is substantially orthogonal to the direction in which the notch 35 extends vertically. That is, assuming that the notch 35 is the center line in the left-right direction, the neighboring regions 37 on both left and right sides and below are substantially symmetrical.

Reference numeral 39 denotes a cut that constitutes a vertically reinforcing rigid portion, and this cut 39 extends straight downward from the gradually changing edge 13b. Therefore, the incisions 39 and the incisions 35 run parallel. The length of the notch 39 is approximately half the length of the notch 35 . The notch 39 is formed in the thick belt-like portion 25, but its deep end 39a is sufficiently above the lower edge 15a. Also, the tangent line of the slowly varying edge 13 b straddling the cut 39 is substantially perpendicular to the direction in which the cut 39 extends vertically. That is, assuming that the notch 39 is the center line in the left-right direction, the neighboring regions 41 on both left and right sides and below are substantially symmetrical.
A pair of notches 39 are provided symmetrically.

A reference numeral 43 denotes a cut that constitutes a weakly rigid portion in the oblique direction. extending towards. The tilt angle (θ) is about 30°. The length of the notch 43 is slightly longer than the length of the notch 39, but since it is formed in the thick belt-like portion 25, its rear end 43a is sufficiently above the lower edge 15a. Moreover, the tangent line of the upper edge 13a straddling the notch 43 is substantially perpendicular to the direction in which the notch 43 extends obliquely. That is, assuming that the notch 43 is the center line in the left-right direction, the neighboring regions 45 on the left and right sides and below are substantially symmetrical.
A pair of notches 43 are provided symmetrically.

Notches 35, 39, 39, 43, 43 are formed in holder 9 as described above.
Since the extraction bag 1 is opened when the perforations 5 are broken, the arm piece 29 and the locking piece 31 of the locking portion 27 of the holder 9 can be pulled up in an inverted V shape as shown in FIG. Become.
Therefore, the gripping portions 33, 33 of the pair of holders 9, 9 are pinched with fingers and pulled outward to raise the locking pieces 31, 31 and the arm pieces 29, 29, and the locking pieces 31, When the 31 is engaged with the rim of the cup C, the state shown in FIG. 4 is obtained and the holder 9 is pulled. Due to the springiness of the arm piece 29 and the locking piece 31, the rim of the cup C fits.

The notch 35 is a portion where the force pulled by the finger is applied as it is, and is pulled outward to escape greatly. At that time, the region 37 near the cut 35 is dragged along with the surface portion 3a of the bag body 3. Therefore, the surface portion 3a bulges outward in a convex shape centered on the notch 35. As shown in FIG. If the cut 35 is made long, that is, deep, the escape distance can be increased, but the cut 35 becomes a sharp angle.
A pair of notches 39, 39 are provided for this purpose. Although the notch 39 is shorter than the notch 35, the surface portion 3a becomes convexly curved around the notch 39 and expands outward to escape. Since the cut 35 and the relief direction are almost the same, the cooperation of the cut 35 and the cuts 39, 39 realizes the formation of one convex curved surface in the direction in which the cut 35 is pulled.

Further, when the holder 9 is deviated laterally outward from the center of the holder 9, a force is applied in a direction crossing the direction in which the finger is pulled. , it is possible to escape outward in the same way as the notch 35. Therefore, the surface portion 3a swells in a convex shape with the cut 43 as the center.
The extraction bag 1 is optimally designed so that the opening rim 7 opens in a substantially perfect circle, and each incision provides an escape distance and a swelling degree of the convex curved surface corresponding to each position. As shown in the image diagram, the opening edge 7 is substantially circular.

By making the cut 35, the rigidity of the opening edge 7 side of the holder 9 is weak, that is, the stiffness is softened. This open state is stably maintained.

The extraction bag 1 is designed so that the opening rim 7 opens in a substantially perfect circle shape when used in the cup shown in FIG.
If the shape and size of the cup are different, the degree of force applied to each part will be different. Also, the optimal low-rigidity part is designed using the pitch, depth, and angle of the cut as adjustment parameters.

Although the embodiment of the present invention has been described in detail above, the specific configuration is not limited to this embodiment. included.
For example, in the above-described embodiment, the weakly rigid portion is formed by slit-like cuts, but may be formed by perforated cuts. Also, it is possible to form the weakly rigid portion with V-shaped or U-shaped cuts instead of the slit-shaped cuts.
Furthermore, it is also possible to increase the number of weakly rigid portions. It is also possible to form a weakly rigid portion by partially reducing the thickness of the material forming the holder 9 .

The weakly rigid portions may be provided symmetrically on the holder 9, and the number thereof is not particularly limited. For example, a total of 3 (center and left and right pairs) or a total of 7 (center and 3 pairs of left and right) may be used. In this way, the weakly rigid portion can be arranged in any way.
Further, as described above, since the weakly rigid portion can be arranged in any way, even if the shape of the holder 9 is changed, it is possible to configure the opening edge to be a perfect circle or a circle close to it. It's becoming For example, it is possible to configure the outer reinforcement part 11 separately from the others, or to make the convex shape of the upper edge of the holder 9 curved only on the left and right sides without curving the whole. .

DESCRIPTION OF SYMBOLS 1... Extraction bag 3... Bag main body 3a... Surface part 5... Perforation 7... Opening edge 9... Holder 11... Outer reinforcing part 13... Outer edge 13a... Upper edge 13b... Slowly varying edge 15... Inner edge 15a... Lower edge 17... Convex curved edge 19 Upper reinforcing part 21 Central reinforcing part 21a Longitudinal edge 21b, 21c Extension part 23 Inverted triangular area 25 Thick band-shaped part 27 Locking part 29 Arm piece 31 Locking piece 33 Knob Part 33a... Outer edge 35... Notch 35a... Back end 37... Neighboring area 39... Notch 39a... Back end 41... Neighboring area 43... Notch 43a... Back end 45... Neighboring area L... Left-right direction center line of holder A... Virtual line α …Range of upper reinforcing part θ…Inclination angle of cut C…Cup

Claims (11)

It comprises a flat bag-shaped bag body made of a water-permeable material and a pair of holders fixed to both surfaces of the bag body and engaged with a container such as a cup. In the extraction bag having an opening and pouring the extraction liquid through the opening,
The holder is formed of a rigid thin plate and includes an upper reinforcing portion attached to the edge side of the opening and a locking portion provided below the upper reinforcing portion,
The upper reinforcing portion has a left-right symmetrical convex shape on the upper edge. a pair of oblique direction weak rigidity portions extending obliquely downward in a direction approaching each other from positions lowered in the respective directions to halfway to the lower edge,
When the engaging portions of the pair of holders are lifted from the surface and engaged with the rim of the container, the weakly rigid portions are pulled outward together so that the opening rim is shaped like a perfect circle or not. A brewing bag characterized by being opened in a nearly circular shape. The extraction bag according to claim 1,
A brewing bag, wherein the pair of obliquely weakly rigid portions of the upper reinforcing portion extend obliquely downward from positions lowered in the left and right directions of the upper edge while being substantially perpendicular to a tangent line of the upper edge. In the extraction bag according to claim 1 or 2,
The upper edge of the upper reinforcing part is formed with gently sloping edges on both the left and right sides of the top,
Extraction characterized in that a pair of vertical reinforcing rigid parts extending straight downward from the upper edge to the lower edge are provided on the gradually changing edge with the vertical main weak rigid part interposed therebetween. bag for. In the extraction bag according to any one of claims 1 to 3,
A brewing bag characterized in that the upper edge of the upper reinforcing portion extends from the top portion to 45° on both left and right sides thereof. In the extraction bag according to any one of claims 1 to 4,
A brewing bag characterized in that the upper reinforcing portion has a shape resembling an arc. In the extraction bag according to claim 5,
The left and right sides of the upper reinforcing portion are further extended outward in the left and right direction to form an outer reinforcing portion having an arc-like shape as a whole. A brewing bag, characterized in that it forms part of the contour. In the extraction bag according to claim 6,
The outer reinforcing portion has a band shape, and a center reinforcing portion is provided that extends vertically and continues below the lateral center of the outer reinforcing portion, both of which are adhered to the bag body. extraction bag. In the extraction bag according to claim 7,
A bag for brewing, characterized in that the upper reinforcing part has a thick belt-like part with a large width dimension, and is provided with a weakly rigid part in an oblique direction. In the extraction bag according to claim 7 or 8,
The holder is made up of a series of rigid thin plates,
The engaging portion extends upward from both the left and right sides with the lower side of the central reinforcing portion as a base end, bends at the upper side, wraps around to the left and right outward, and continues at the lower side, and is raised in an inverted V shape. Characterized extraction bag. In the extraction bag according to claim 9,
A bag for brewing, characterized in that the locking portion is separated from the outer reinforcing portion and the central reinforcing portion by a slit-like cut and can be pulled up. In the extraction bag according to any one of claims 1 to 10,
A bag for brewing, wherein the weakly rigid portion is formed by a slit-shaped or V-shaped or U-shaped cut in a rigid thin plate of the holder.

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