JP6577039B2 - Flexible container bag - Google Patents

Description

  The present invention relates to a flexible container bag used for applications such as when transporting powder particles.

  Conventionally, in various industries, flexible container bags have been widely used for transportation and storage of grains and feeds, powder pellets such as resin pellets and minerals, and other purposes. The flexible container bag described in Patent Document 1 is made of synthetic fibers such as polypropylene and polyethylene, and includes a bag-like main body portion that accommodates powder particles and a suspension belt that can suspend the bag-like main body portion. . The suspension belt is sewn to the bag-shaped main body.

JP 2008-24347 A

  In recent years, flexible container bags composed of materials containing inorganic fibers have been devised in order to improve weather resistance. However, compared with synthetic fibers, inorganic fibers are superior in weather resistance such as ultraviolet rays and water immersion, but are weak in strength against a force applied in a direction intersecting the longitudinal direction of the fibers. Therefore, in the case of a suspension belt made of a material containing inorganic fibers, the strength of the suspension belt may be reduced depending on how to sew the bag-shaped main body.

  The objective of this invention is providing the flexible container bag excellent in the intensity | strength comprised from the material containing an inorganic fiber.

Hereinafter, means for solving the above-described problems and the effects thereof will be described.
A flexible container bag according to an embodiment that solves the above problem includes a bag body having an opening, and a suspension belt that can suspend the bag body in a state in which the opening of the bag body is positioned at the upper end in the vertical direction. Is made of a material containing at least inorganic fibers, and the stitches at the sewing site where the suspension belt is sewn to the bag body extend in a direction intersecting the width direction of the suspension belt.

  According to this configuration, the seam obtained by sewing the suspension belt to the bag body does not extend in the width direction of the suspension belt. For this reason, it is reduced that the damaged part of the fiber by the needle used for sewing is continuously arranged in the width direction of the suspension belt. That is, when the bag body is suspended by the suspension belt, the possibility that the suspension belt is broken is reduced. Therefore, the flexible container bag excellent in the intensity | strength comprised from the material containing an inorganic fiber can be obtained.

  In the flexible container bag, the bag body has a bottom surface located on the opposite side of the opening and a peripheral surface continuous to the periphery of the bottom surface, and the sewing location is provided on the bottom surface of the bag body, It is preferable that it is not provided in the surrounding surface.

According to this configuration, since the suspension belt is not sewn on the circumferential surface of the bag body, it is possible to reduce the possibility of misalignment on the circumferential surface of the bag body when the bag body is suspended by the suspension belt.
In the flexible container bag, it is preferable that a positioning portion for determining a position of the suspension belt on the peripheral surface is provided on the peripheral surface of the bag body.

  According to this configuration, it is possible to suppress the displacement of the suspension belt relative to the bag body without sewing the suspension belt to the circumferential surface of the bag body. For this reason, the flexible container bag can be stably suspended by the suspension belt.

  In the flexible container bag, the stitches at the sewing locations include at least a first seam, a second seam, and a third seam that are arranged in the width direction on the suspension belt and are linear. The seam is preferably continuous with the first seam and the third seam.

According to this configuration, since each of the plurality of stitches has a continuous zigzag shape, the suspension belt can be sewn firmly and quickly to the bag body.
In the flexible container bag, the suspension belt is preferably made of a material containing basalt fiber which is a kind of inorganic fiber.

According to this configuration, it is possible to obtain a flexible container bag including a suspension belt having excellent strength and weather resistance.
In the flexible container bag, the bag body is preferably made of a material containing basalt fiber.

  According to this structure, a flexible container bag provided with the bag body excellent in intensity | strength and excellent also in weather resistance can be obtained.

The perspective view which shows a flexible container bag roughly. The top view which shows the sewing part provided in the bottom part of the bag body. The top view which shows the sewing part provided in the surrounding surface of the bag body. The top view which shows the sewing part of the comparative example provided so that a seam might extend in the width direction of a suspension belt. The top view which expands and shows the stitch of a comparative example. FIG. 4 is an enlarged plan view showing the seam of FIG. 3. The partial top view which shows the seam of a modification. The partial top view which shows the seam of a modification. The perspective view which shows the flexible container bag of a modification. The perspective view which shows the flexible container bag of a modification. The perspective view which shows the suspension belt of a modification.

  Hereinafter, an embodiment of a flexible container bag will be described with reference to the drawings. In general, the flexible container bag is used for applications such as transporting powder and rubble.

  As shown in FIG. 1, the flexible container bag 20 includes a bag body 30 and a suspension belt 40 sewn to the bag body 30. The bag 30 is formed in a rectangular cylinder shape having a rectangular bottom surface. The bag body 30 includes a bottom portion 31 that forms the bottom surface of the bag body 30 and a body portion 32 that forms the peripheral surface of the bag body 30. The lower end of the body portion 32 is connected to the periphery of the bottom portion 31. The body part 32 has an opening 33 of the bag body 30 at the end opposite to the part connected to the bottom part 31.

  The suspension belt 40 is constituted by one continuous endless belt member. The suspension belt 40 is provided so as to surround the bag body 30 from the lower surface of the bottom portion 31 to the outer peripheral surface of the body portion 32. The suspension belt 40 is sewn to the lower surface of the bottom portion 31 of the bag body 30 in a state where two predetermined length portions 41 and 42 in the longitudinal direction are twisted so as to cross each other in a cross shape. Furthermore, the suspension belt 40 has a body portion in a state where the other predetermined length portions 43, 44, 45, 46 in the longitudinal direction extend vertically upward from the four locations on the periphery of the bottom portion 31 of the bag body 30. 32 is sewn on the outer peripheral surface.

  In addition, two other predetermined length portions 47 and 48 in the longitudinal direction of the suspension belt 40 are formed at the positions above the opening 33 of the bag body 30 to form the latching portion 50 having two loop shapes. is doing. The latching portion 50 is configured to be latched by a holding device such as a crane (not shown). That is, when the latching portion 50 is latched by a crane or the like, the suspension belt 40 functions so that the bag body 30 can be suspended with the opening 33 of the bag body 30 positioned at the upper end in the vertical direction. The bag body 30 and the suspension belt 40 constituting the flexible container bag 20 are made of a material containing inorganic fibers such as glass fiber and carbon fiber, and in the present embodiment, made of a material containing basalt fiber.

  The suspension belt 40 is sewn to the bottom portion 31 and the body portion 32 of the bag body 30 at a plurality of sewing portions 60 as sewing locations. In the present embodiment, four sewn portions 60 are formed on the bottom portion 31 and the trunk portion 32 of the bag body 30. That is, the suspension belt 40 is sewn to the bag body 30 at a total of eight sewing portions 60. The sewing portion 60 in the body portion 32 of the bag body 30 is disposed in the vicinity of the opening 33 on the peripheral surface of the bag body 30.

  Further, the bag body 30 is provided with a plurality of covering portions 70 that cover the sewing portion 60 formed in the body portion 32. The covering portion 70 is made of, for example, a black patch to suppress deterioration of the sewing portion 60 due to ultraviolet rays. The covering portion 70 is sewn to the bag body 30 along the longitudinal direction of the suspension belt 40 at both sides in the width direction intersecting with the longitudinal direction of the suspension belt 40. That is, the suspension belt 40 passes between the bag body 30 and the covering portion 70.

  As shown in FIG. 2 and FIG. 3, a plurality of sewing portions 60 provided on the bottom portion 31 and the trunk portion 32 of the bag body 30 are formed when the suspension belt 40 is sewn on the bag body 30. The seam 80 appears. The seam 80 is formed by a series of four seams 81, 82, 83, 84 that form a straight line arranged in the width direction of the suspension belt 40. That is, the first seam 81, the second seam 82, the third seam 83, and the fourth seam from one to the other in the width direction of the suspension belt 40 (from left to right in FIG. 3). Eyes 84 are formed in the sewn portion 60. The first to fourth stitches 81, 82, 83, 84 extend in a direction that intersects the width direction of the suspension belt 40. Here, the direction intersecting the width direction of the suspension belt 40 is a direction that does not coincide with the width direction of the suspension belt 40. The first to fourth stitches 81, 82, 83, 84 in the present embodiment also intersect with the longitudinal direction of the suspension belt 40.

  In the width direction of the suspension belt 40, the left end of each of the straight seams 81, 82, 83, 84 is one end and the right end is the other end. As shown in FIG. 3, in the sewing portion 60, the other end of the first seam 81 is continuous with one end of the second seam 82, and the other end of the second seam 82 is the third seam. The other end of the third seam 83 is continuous with one end of the fourth seam 84. That is, the seam 80 formed in the sewn portion 60 is formed as one continuous seam having a zigzag shape from one end of the first seam 81 to the other end of the fourth seam 84. As shown in FIG. 2, the seam 80 formed in the sewing part 60 in the bottom part 31 of the bag 30 also has the same configuration as described above.

Next, the effect | action of the flexible container bag in this embodiment is demonstrated.
A suspension belt constituting a conventional flexible container bag is mainly composed of synthetic fibers such as polypropylene and polyethylene. In this case, the fibers constituting the suspension belt deteriorate due to exposure to the surrounding environment such as sunlight, rain, frost, and wind, so that it is difficult to use for a long period of time. On the other hand, the suspension belt 40 of the flexible container bag 20 in the present embodiment is made of a material containing basalt fiber, which is a kind of inorganic fiber.

  Basalt fibers are known to have excellent weather resistance. In particular, the degree of deterioration of the basalt fiber due to the ultraviolet rays of sunlight is small compared to synthetic fibers such as polypropylene and polyethylene. Therefore, by constituting the suspension belt 40 using the basalt fiber, it is possible to suppress the suspension belt 40 from being deteriorated by the surrounding environment, and to realize a longer life of the suspension belt 40. In addition, the basalt fiber is excellent not only in weather resistance but also in tensile strength. For this reason, the basalt fiber has high strength with respect to the tensile force in the longitudinal direction of the fiber. The suspension belt 40 is required to have high strength in the longitudinal direction in order to suspend the flexible container bag 20 that accommodates heavy objects. The basalt fiber is suitable as a fiber material constituting the suspension belt 40. That is, by configuring the suspension belt 40 so that the longitudinal direction of the suspension belt 40 matches the longitudinal direction of the basalt fiber, the suspension belt 40 having high strength in the longitudinal direction can be obtained. Therefore, in the suspension belt 40 in the present embodiment, at least a part of the fibers extending in the longitudinal direction of the suspension belt 40 is composed of basalt fibers.

  By the way, as described above, the basalt fiber has high strength in the longitudinal direction of the fiber, and may be vulnerable to a force applied in a direction intersecting the longitudinal direction. Here, the force applied in the direction intersecting the longitudinal direction is, for example, a force for bending the fiber, a shear stress, or the like. In particular, when the suspension belt 40 is sewn to the bag body 30, the sewing needle used for sewing penetrates the front and back of the suspension belt 40, so that shear stress is applied to the basalt fiber constituting the suspension belt 40, and the fiber The part may be damaged.

  As in the comparative example shown in FIGS. 4 and 5, for example, when the suspension belt 40 is sewn to the bag body 30 by a sewing method in which the seam 80 extends in the width direction of the suspension belt 40, the sewing needle penetrates. The through portions 90 are formed so as to be continuously arranged in the width direction of the suspension belt 40. Here, in the suspension belt 40, the damaged part of the fiber damaged by the penetration of the sewing needle coincides with at least the penetration part 90 through which the sewing needle penetrates. For this reason, there is a possibility that the fiber-damaged portions due to the sewing needles are continuously arranged in the width direction of the suspension belt 40 because the penetration portions 90 of the sewing needle are continuously arranged in the width direction of the suspension belt 40. As described above, when the fiber damaged portions are continuously arranged in the width direction of the suspension belt 40, the tensile strength in the longitudinal direction of the suspension belt 40 is lowered. In particular, when the fiber damaged portions are continuously arranged over substantially the entire width direction of the suspension belt 40, the drop in the tensile strength of the suspension belt 40 becomes more remarkable, and the suspension belt 40 may be broken.

  Further, when the flexible container bag 20 is suspended, the load applied to the suspension belt 40 by the contents accommodated in the bag body 30 concentrates on the sewing portion 60 where the suspension belt 40 is sewn to the bag body 30. In particular, the sewed portion 60 of the body portion 32 of the bag body 30 rather than the sewed portion 60 of the bottom portion 31 of the bag body 30 that receives the load with the entire predetermined length portions 41 and 42 crossing in a cross shape in the suspension belt 40. In addition, the load tends to concentrate. Therefore, fiber damage at the sewn portion 60 of the body portion 32 greatly affects the tensile strength of the suspension belt 40. That is, depending on how to sew the suspension belt 40 to the bag body 30, the suspension belt 40 may be fragile, and the weight of the bag body 30 on which the suspension belt 40 can be suspended may be reduced.

  As shown in FIGS. 3 and 6, the seam 80 of the suspension belt 40 in the present embodiment intersects the direction that does not coincide with the width direction of the suspension belt 40, that is, the width direction of the suspension belt 40, compared to the comparative example. It is formed to extend in the direction. In this case, since the penetrating portions 90 of the sewing needles in the suspending belt 40 are not continuously arranged in the width direction of the suspending belt 40, a decrease in the tensile strength of the suspending belt 40 is suppressed. The seam 80 in FIGS. 5 and 6 is exaggerated for easy understanding of the description.

According to the flexible container bag of the present embodiment, the following effects can be obtained.
(1) The seam 80 obtained by sewing the suspension belt 40 to the bag body 30 does not extend in the width direction of the suspension belt 40. For this reason, it is reduced that the damage part of the fiber by the sewing needle used for sewing penetrates continuously in the width direction of the suspension belt 40. That is, when the bag body 30 is suspended by the suspension belt 40, the possibility that the suspension belt 40 is broken is reduced. Therefore, the flexible container bag 20 excellent in the intensity | strength comprised from the material containing an inorganic fiber can be obtained.

  (2) The seam 80 is formed as one continuous seam having a zigzag shape. Thereby, the suspension belt 40 can be sewn firmly and quickly to the bag body 30.

  (3) The suspension belt 40 is made of a material containing basalt fiber. Thereby, the flexible container bag 20 provided with the suspension belt 40 excellent in strength and weather resistance can be obtained.

  (4) The bag 30 is comprised from the material containing a basalt fiber. Thereby, the flexible container bag 20 provided with the bag 30 excellent in strength and weather resistance can be obtained.

The flexible container bag described above may be modified as follows.
-As shown in Drawing 7 and Drawing 8, in the above-mentioned embodiment, stitch 80 provided in sewing part 60 is not restricted to one continuous stitch 80 which exhibits a zigzag shape. As shown in FIG. 7, the seam 80 has the other end of the first seam 81 and one end of the fourth seam 84 continuous, and the other end of the second seam 82 and the third seam. The stitch may be continuous with one end of 83. Further, as shown in FIG. 8, the stitch 80 may be an endless stitch. Further, the seam 80 may be a seam in which the first to fourth seams 81, 82, 83, and 84 are not continuous with each other and are provided independently. In other words, when the suspension belt 40 is sewn to the bag body 30, it is only necessary that the seam 80 is sewn so as to extend in a direction other than the width direction of the suspension belt 40.

  -In the said embodiment, as shown in FIG. 9, the sewing part 60 which is a sewing location where the suspension belt 40 was sewn on the bag body 30 was provided only in four places in the bottom part 31 of the bag body 30. As shown in FIG. Also good. Usually, the load applied when the bag body 30 is suspended by the suspension belt 40 is concentrated on the sewing portion 60 in the body portion 32 of the bag body 30. That is, the bag body 30 is pulled downward by the contents accommodated in the bag body 30, while the sewing portion 60 of the body portion 32 to which the suspension belt 40 is sewn is pulled upward from the suspension belt 40. For this reason, misalignment may occur on the peripheral surface of the bag body 30. In this regard, in the suspension belt 40 shown in FIG. 9, the suspension belt 40 is not sewn to the body portion 32 that constitutes the peripheral surface of the bag body 30. For this reason, when the bag body 30 is suspended by the suspension belt 40, it is possible to suppress the possibility of misalignment of the peripheral surface of the bag body 30. Further, since the load is received by the entire predetermined length portions 41 and 42 of the suspension belt 40 at the bottom portion 31 constituting the bottom surface of the bag body 30, there is little possibility of misalignment.

  Further, in the above modification, the covering portion 70 sewn to the body portion 32 functions as a positioning portion that determines the position of the suspension belt 40. Similar to the covering portion 70, the positioning portion is formed by sewing both side portions of the suspension belt 40 in the width direction to the bag body 30. That is, when the predetermined length portions 43, 44, 45, 46 of the suspension belt 40 pass between the bag body 30 and the covering portion 70, the movement of the suspension belt 40 on the peripheral surface of the bag body 30 is restricted. Yes. According to this configuration, it is possible to suppress displacement of the suspension belt 40 with respect to the bag body 30 without sewing the suspension belt 40 to the circumferential surface of the bag body 30. For this reason, the flexible container bag 20 can be stably suspended by the suspension belt 40. The positioning portion is preferably formed in the vicinity of the opening 33 on the peripheral surface of the bag body 30. By fixing the position of the suspension belt 40 in the vicinity of the opening 33, the flexible container bag 20 can be suspended more stably.

  As shown in FIG. 10, in the said embodiment, the flexible container bag 20 may be a bottomed cylindrical flexible container bag which consists of the bag body 30 and the circular bottom part 31. FIG.

  As shown in FIG. 11, in the above-described embodiment, the suspension belt 40 may be formed using two suspension belts 40 so that the suspension belts 40 do not cross each other at the bottom 31 of the bag body 30. . Each suspension belt 40 is configured by a belt member. One suspension belt 40 has predetermined length portions 411 and 422 at the end portions that come into contact with the bottom 31 of the bag body 30. The other suspension belt 40 has predetermined length portions 412 and 421 that contact the bottom 31 of the bag body 30 at the end.

  In the above-described embodiment, the shape of the first to fourth stitches 81, 82, 83, 84 constituting the stitch 80 is not limited to a linear shape. Further, the seam 80 is not limited to an aspect composed of the four seams 81, 82, 83, 84, but may be composed of three or less seams, and may be composed of five or more seams. Also good.

  In the above embodiment, the bag body 30 may be made of a material that does not contain inorganic fibers such as basalt fibers. For example, by forming the bag body 30 from synthetic fibers such as polyethylene and polypropylene, the possibility of damaging the fibers constituting the bag body 30 when the suspension belt 40 is sewn to the bag body 30 can be reduced.

-In above-mentioned embodiment, the suspension belt 40 should just contain the inorganic fiber at least, and may contain synthetic fibers, such as an aramid fiber and polyethylene other than an inorganic fiber.
-In the said embodiment, the suspension belt 40 may comprise not only a basalt fiber but the material containing other inorganic fibers, such as glass fiber and carbon fiber. In addition to basalt fibers, inorganic fibers have excellent weather resistance compared to synthetic fibers.

Claims (5)

A bag having an opening;
A suspension belt capable of hanging the bag body in a state where the opening of the bag body is located at the upper end in the vertical direction,
The bag body has a bottom surface located on the opposite side of the opening, and a peripheral surface continuous to the periphery of the bottom surface,
The suspension belt is made of a material containing at least inorganic fibers,
The seam of the sewing location where the suspension belt is sewn to the bag body extends in a direction intersecting the width direction of the suspension belt.
While the said sewing location is provided in the bottom face of the said bag body, it is a flexible container bag which is not provided in the surrounding surface of the said bag body . The flexible container bag according to claim 1 , wherein a positioning portion that determines a position of the suspension belt on the peripheral surface is provided on the peripheral surface of the bag body. The stitches at the sewing locations have at least first seams, second seams, and third seams that are aligned in the width direction and linear in the suspension belt,
The flexible container bag according to claim 1, wherein the second seam is continuous with the first seam and the third seam. The flexible container bag according to any one of claims 1 to 3 , wherein the suspension belt is made of a material including basalt fiber, which is a kind of inorganic fiber. The flexible container bag according to any one of claims 1 to 4 , wherein the bag body is made of a material containing a basalt fiber.

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