Sheet for holding the bag in place

Abstract

To provide a self-supporting sheet for a bag body which can be easily inserted into and removed from the bag body and has improved workability compared to conventional ones.SOLUTION: A self-supporting sheet is inserted into a bag body, and a restoring force thereof from the rolled-up state allows the bag body to self-support with the opening of the bag body open. The self-supporting sheet for the bag body has locking portions at both ends of the sheet body in the rolling direction that can temporarily lock both ends together.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a bag self-supporting sheet that is inserted into a bag such as a waste bag and holds the bag so that it can stand on its own with the opening of the bag wide open. [Background technology]

[0002] For example, at construction sites, waste material bags (commonly known as garbage bags) are used to collect waste materials and garbage generated during construction work. Such garbage bags are usually made of a flexible woven fabric woven with synthetic resin fibers, and in order to keep the top end of the bag open, the worker must always hold the top end of the garbage bag with his or her hand. Therefore, the worker must, for example, grasp the top end of the garbage bag with one hand, open the bag opening, and stuff the garbage into the bag with the other hand, making the collection work complicated and inefficient.

[0003] In order to improve the workability of debris collection at such work sites, various means have been proposed to hold the bag body so that it can stand on its own with the opening wide open (see, for example, Patent Documents 1 to 3).

[0004] For example, Patent Document 1 discloses a sandbag opening holder that can be made by rolling a rectangular sheet to form a cylinder, placing a sandbag inside the cylindrical sheet, and folding the opening of the sandbag over the top end of the cylindrical sheet to hold it in place.

[0005] Furthermore, for example, Patent Document 2 discloses a storage bag self-standing holder in which a similar rectangular sheet is rolled into a cylindrical shape and placed inside the storage bag, allowing the bag to stand upright while keeping the top end of the bag open.

[0006] Furthermore, for example, Patent Document 3 discloses a protector for waste bags in which a similar rectangular sheet is rolled into a cylindrical shape and placed inside the waste bag, allowing the bag to stand upright with the top end open using the restoring force of the rolled-up sheet. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-271319 [Patent Document 2] Japanese Patent Application Laid-Open No. 2007-126197 [Patent Document 3] Registered Utility Model No. 3197341 Summary of the Invention [Problem to be solved by the invention]

[0008] The sandbag opening holder of Patent Document 1 described above allows one or more sandbags to be stored in a cylindrical sheet and transported together. However, because the cylindrical sheet is placed on the outside of the sandbag, when the sandbag is filled to capacity with soil and sand, the sandbag expands and compresses the cylindrical sheet, making it difficult to remove the cylindrical sheet from the sandbag.

[0009] Furthermore, according to the self-supporting holder of Patent Document 2, the sheet can be reused by removing it when the bag is appropriately filled with rubbish. However, because the cylindrically rolled sheet is placed in the storage bag with both side edges engaged with each other via an engaging means, the sheet is compressed when the bag is filled with rubbish, which still leaves the problem of making it difficult to remove the sheet from the bag.

[0010] Furthermore, the protector in Patent Document 3 cannot maintain the sheet rolled into a cylindrical shape, so the worker must hold the sheet in one hand while rolling it up, and then insert the waste material bag over the rolled sheet with the other hand.

[0011] The present invention has been made in consideration of these problems, and aims to provide a self-supporting sheet for a bag body that allows the bag body to remain self-supporting with the upper opening wide open, and that is easier to insert into and remove from the bag body, making it easier to use than conventional self-supporting sheets. [Means for solving the problem]

[0012] In order to solve the above-mentioned problems, the present invention provides a self-supporting sheet that is inserted into a bag body and can self-support the bag body with the upper end opening of the bag body open by a restoring force from a rolled-up state, and the self-supporting sheet is provided with a sheet body that can temporarily lock both ends of the self-supporting sheet in the rolling direction. One This is a sheet for supporting a bag body by itself, which has a locking portion.

[0013] It is preferable that the self-supporting sheet has an engaging portion formed as an opening at one end of the sheet body in the rolling direction, with a long slit perpendicular to the rolling direction, and a tongue portion formed at the other end of the sheet body in the rolling direction, with a width that allows it to be inserted and removed into the slit.

[0014] In addition, the self-supporting sheet may be one in which the engaging portion has a hole portion formed at one end of the sheet body in the rolling direction, and an enlarged protrusion portion formed at the other end of the sheet body in the rolling direction and having a head portion that can be inserted and removed into the hole portion.

[0015] Furthermore, it is preferable that the circumferential length of the sheet body when the two end portions of the self-supporting sheet are locked together by the locking portions is shorter than the circumferential length of the upper end opening of the bag body. [Effects of the Invention]

[0016] According to the self-supporting sheet of the present invention, the sheet body has locking portions at both ends in the rolling direction, which allows the sheet body to be temporarily held in a cylindrical state. Therefore, a worker can easily install the sheet body by, for example, placing a bag over the cylindrical sheet body. Furthermore, according to the self-supporting sheet of the present invention, the sheet body is installed on the bag body with the locking portions released, allowing the sheet body to be easily removed from the bag body by, for example, twisting it up and down. This significantly improves the workability of debris collection on-site. [Brief explanation of the drawings]

[0017] [Figure 1] FIG. 1 is a diagram showing a state in which a self-supporting sheet according to a first embodiment of the present invention is used. [Figure 2] FIG. 2 is a plan view of the self-supporting sheet shown in FIG. [Figure 3] 3 is an enlarged cross-sectional view of the locking portion of the self-supporting sheet shown in FIG. 1. FIG. [Figure 4] 4 is an enlarged plan view showing the locking portion of the self-supporting sheet shown in FIG. 2. FIG. [Figure 5] FIG. 5 is a plan view showing a modified example of the locking portion according to the first embodiment of the present invention. [Figure 6] FIG. 6 is a plan view of a self-supporting sheet according to a second embodiment of the present invention. [Figure 7] 7 is an enlarged cross-sectional view of the enlarged head projection (locking portion) of the self-supporting sheet shown in FIG. [Figure 8] FIG. 8 is a photographic diagram for explaining how to use the self-supporting sheet, and in particular, a diagram for explaining how to attach the self-supporting sheet to a bag. [Figure 9] FIG. 9 is a photographic view for explaining how to use the self-supporting sheet, and in particular, a view for explaining how to remove the self-supporting sheet from the bag. [Figure 10] FIG. 10 is a diagram illustrating a tag plate for indicating the classification of waste materials and a method for attaching the tag plate. DETAILED DESCRIPTION OF THE INVENTION

[0018] A self-supporting sheet for a bag according to a preferred embodiment of the present invention will be described in detail below with reference to the drawings. Note that, here, the bag will be described using a rubble bag B for collecting rubble such as waste materials generated at construction sites, etc. However, the present invention is not limited to rubble bags, and can be applied to any bag made of flexible woven fabric, such as plastic bags, sandbags, and container bags.

[0019] (First embodiment) Fig. 1 is a diagram showing a state in which a self-supporting sheet 100 according to a first embodiment of the present invention is in use. Fig. 2 is a plan view of the self-supporting sheet 100. The self-supporting sheet 100 is inserted into a garbage bag B in a rolled-up state, and the restoring force of the sheet body 101 as it tries to return from the rolled-up state to an open state widens the upper opening (bag mouth) of the garbage bag B, allowing it to stand on its own.

[0020] The main body 101 of the self-supporting sheet 100 is formed from a sheet of, for example, foamed propylene or foamed polypropylene, which has a relatively wide bending elasticity limit range so that it can be easily rolled up by an operator. For example, it can be formed by cutting a readily available protective sheet (curing board) made of plywood into a rectangle. It is also possible to recycle a used protective sheet to process the self-supporting sheet 100.

[0021] In Figure 2, the horizontal direction (long side direction) of the rectangular sheet body 101 is the rolling direction, and its length should be approximately the same as or slightly longer than the perimeter of the upper opening of the target litter bag B. The width of the vertical direction (short side direction) of the sheet body 101 may be approximately the same as or slightly longer than the height (depth) of the litter bag B. In one embodiment, the sheet body 101 can be formed using a foamed polypropylene board measuring 910 mm x 1820 mm and 1.5 mm thick.

[0022] Locking portions 102 are formed on both end portions 101L, 101R in the rolling direction of the sheet body 101 of the self-supporting sheet 100, so that the end portions can be overlapped and temporarily locked together. As shown in Fig. 2, the locking portion 102 is formed as an opening at one end portion 101L of the sheet body 101 and is composed of a pair of a long slit 102A that is perpendicular to the rolling direction, and a tongue portion 102B that is formed at the other end portion 101R of the sheet body 101 and has a width that allows it to be inserted into and removed from the slit 102A.

[0023] The slit 102A and the tongue portion 102B are formed in a position where the sheet body 101 can be held in a rolled-up cylindrical state by inserting the tongue portion 102B into the slit 102A. When the tongue portion 102B is inserted into the slit 102A, the restoring force (tensile force) of the sheet body 101 as it tries to unfold creates an angle between the edge of the slit 102A and the tongue portion 102B, and they are locked together (see FIG. 3(a)). When the sheet body 101 is held in this rolled-up cylindrical state (this is referred to as the "locked state" in this specification), slightly moving both ends 101L, 101R in a direction that reduces the diameter of the cylinder disengages the tongue portion 102B from the slit 102A, and the locked state can be easily released (see FIG. 3(b)).

[0024] In a locked state in which both end portions 101L, 101R of the sheet body 101 are locked by the locking portions 102 (slit 102A and tongue portion 102B), the circumferential length of the sheet body 101 is shorter than the circumferential length of the upper opening of the litter bag B. Specifically, as illustrated in FIG. 4, in an embodiment in which the sheet body 101 has the above-mentioned size (910 mm x 1820 mm, thickness 1.5 mm), the slit 102A is preferably formed at a distance Sd of 15 to 20 mm from the end of one end portion 101L. Furthermore, the tongue portion 102B is preferably formed at a distance Td of 6 to 11 mm from the end of the other end portion 101R.

[0025] The size of the locking portion 102 (slit 102A and tongue portion 102B) is adapted to the size of a human palm. Furthermore, if there are too many locking portions 102, it becomes difficult to handle. Furthermore, if the locking portions 102 are too small, both ends 101L and 101R of the sheet main body 101 will easily come off. Therefore, in one embodiment, the length S1 of the slit 102A is 110 mm, and the width Sw is 15 mm. Furthermore, in this embodiment, the extension length Tp of the tongue portion 102B is 40 mm, and the width Tw is 100 mm.

[0026] Preferably, a rectangular window 102Ba is formed around the tongue 102B so that when the two ends are overlapped with each other with the end 101L having the slit 102A facing inward and the end 101R having the tongue 102B facing outward, the position of the slit 102A into which the tongue 102B is inserted can be seen from the outside through the window 102Ba.

[0027] 5, for example. The self-supporting sheet 100 of this embodiment may be removed from the garbage bag B while twisting the sheet body 101, as will be described later. The stress generated in the corners when such twisting is applied is dispersed by the rounded edges 102Ar and 102Br, thereby preventing cuts in the corners and increasing the durability of the self-supporting sheet 100.

[0028] In this embodiment, as shown in Fig. 2, finger hole portions 103, 103, ... are formed at the four corners of the top, bottom, left, and right of the seat main body 101. In the example shown in Fig. 2, the finger hole portion 103 is circular, but it may be, for example, an elongated hole so that a worker can place multiple fingers therethrough.

[0029] Thus, the self-supporting sheet 100 of this embodiment is formed with slits 102A, tongue portions 102B, and finger holes 103, 103, etc. so that it can be used upside down or inside out. Repeated use of a self-supporting sheet bent in only one direction may result in a residual bend, which may weaken its ability to recover when placed in a garbage bag B. Furthermore, cracks may develop in parts of the sheet body 101, or dirt may adhere to the backside. To address these issues, the self-supporting sheet 100 of this embodiment can be used reversibly, either upside down or inside out, making it less likely to bend and preventing localized cracks and dirt from adhering. This contributes to improved long-term durability.

[0030] (Second embodiment) Next, a self-supporting sheet 200 according to a second embodiment of the present invention will be described. Fig. 5 is a plan view of the self-supporting sheet 200. The self-supporting sheet 200 according to the second embodiment differs from the self-supporting sheet 100 according to the first embodiment described above only in the shape of the locking portion 202, and the configuration other than the locking portion 202 can be directly quoted from the configuration described in the first embodiment. The function and method of use are also the same.

[0031] The locking portions 202 are formed on both end portions 201L, 201R in the rolling direction of the sheet body 201 of the self-supporting sheet 200, and are configured to overlap and temporarily lock the both end portions together. As illustrated in Fig. 6, the locking portion 202 is configured by a pair of a hole portion 202A formed in one end portion 201L and an enlarged head protrusion portion 202B formed in the other end portion 201R and having a head portion 202Bh that can be inserted into and removed from the hole portion 202A.

[0032] Fig. 7 is an enlarged cross-sectional view showing the structure of the enlarged protrusion 202B. As shown in Fig. 7, the enlarged protrusion 202B has a button-like structure in which a head 202Bh and a neck 202Bn having a smaller diameter than the head 202Bh are joined to the sheet body 201 with a rivet or the like. To make the self-supporting sheet 200 reversible, the enlarged protrusions 202B are preferably provided symmetrically on the front and back of the sheet body 201. However, the enlarged protrusions 202B may be provided on only one side of the sheet body 201.

[0033] By inserting and removing the enlarged protrusion 202B formed on one end 201R of the seat body 201 into and from the hole 202A formed on the other end 201L, these two end portions 201L and 201R can be easily attached and detached.

[0034] (How to use the self-supporting sheet) Next, a specific method of using the self-supporting sheet 100 of the first embodiment described above will be described as an example.

[0035] The self-supporting sheet 100 is a board that is inherently flat, so that multiple sheets can be stacked together with flexible glass bags B and transported to the work site together.

[0036] First, the long side of the self-supporting sheet 100 is rolled up, and the end 101L with the slit 102A is placed inward, and the end 101R with the tongue portion 102B is placed outward, and the tongue portion 102B is inserted into the slit 102A (see Figures 8(a) and (b)).

[0037] When the tongue portion 102B is inserted into the slit 102A, an angle is created between the edge of the slit 102A and the tongue portion 102B due to the restoring force of the sheet body 101, and they are locked together. This allows the sheet body 101 to be maintained in a rolled-up cylindrical state.

[0038] The self-supporting sheet 100, whose both ends 101L and 101R are locked by the locking portions 102 (slits 102A and tongue portions 102B), can be made to stand on its own by placing the circular cylindrical bottom on the ground. In this state, the sheet body 101 is installed by placing a litter bag B over it (see Figure 8(c)). When the sheet body 101 is held in a cylindrical shape (locked state), the cylindrical diameter of the sheet body 101 is larger than the opening diameter of the litter bag B, so the sheet body 101 can be smoothly inserted into the litter bag B.

[0039] Next, the sheet body 101 with the litter bag B placed over it is turned upside down. Then, by holding the ends 101L and 101R of the sheet body 101 and moving it slightly in the direction of reducing its cylindrical diameter, the tongue portions 102B come out of the slits 102A and the locked state is released. This releases the sheet body 101, and its restoring force allows the litter bag B to expand. The sheet body 101 also supports the litter bag B, allowing it to stand on its own (see Figure 8(d)). At this time, the overlapping of both ends 101R and 107L of the sheet body 101 allows the litter bag B to stand on its own more stably (see Figure 1).

[0040] After the waste material has been collected into the rubbish bag B, the user can place his or her fingers in the finger holes 103, 103 of the sheet body 101 and remove the sheet body 101 from the rubbish bag B. Even if the rubbish bag B is filled to the brim with waste material (garbage), the sheet body 101 can be easily removed from the rubbish bag B by moving the left and right finger holes 103, 103 up and down and repeatedly twisting the sheet body 101 while rubbing both ends 101R, 107L (see Figure 9).

[0041] In this embodiment, tag plates 301-304 for indicating the classification of waste materials can be used in combination, as shown in Fig. 10. The tag plates 301-304 can indicate the type of waste material to be separated and collected, such as "mixed waste," "gypsum board," "waste wood," "scrap iron," etc. The tag plates 301-304 may also be color-coded according to the type of waste material (garbage) to be collected. As described above, the self-supporting sheet 100 can make the garbage bag B stand on its own in an expanded state. Therefore, by attaching the tag plate 303 so that the upper end of the sheet body 101 is sandwiched between the two notches in the tag plate 303, the tag plate 303 can be used to indicate the classification of waste materials. [Explanation of symbols]

[0042] 100 Self-supporting sheet (first embodiment) 101 Seat body 101L, 101R end 102 Locking part 102A Slit 102Ar Round Edge 102B Tongue piece 102Ba window section 102Br Round Edge 103 Finger hole 200 Self-supporting sheet (second embodiment) 201 Seat body 201L, 201R ends 202 Locking part 202A Hole 202B Head expansion protrusion 202Bh head 202Bn Neck 301~304 tag plate B. Gara bag (bag body)

Claims

[Claim 1] A self-supporting sheet that is inserted into a bag body and can self-support the bag body with the upper end opening of the bag body open by expanding the bag body from the inside with a restoring force that tries to return the bag body from a rolled up state to an open state, The self-supporting sheet has locking portions at both ends, which are one end and the other end in the rolling direction of the sheet body, that can temporarily lock the both ends together, When the sheet body is inserted into the bag body, the sheet body is rolled into a cylindrical shape with the one end portion facing inward and the other end portion facing outward, the locking portions lock the two end portions of the sheet body together in a state where the sheet body is rolled into a cylindrical shape when the sheet body is inserted into the bag body, and release the locked state of the two end portions after the sheet body is inserted into the bag body, thereby allowing the bag body to expand from the inside by the restoring force, the locking portion has a long slit formed at one end and perpendicular to the rolling direction, and a tongue portion protruding from the other end toward the center of the sheet body and having a width that allows it to be inserted into and removed from the slit, the sheet body further has a window portion formed by opening around the tongue portion, so that when the sheet body is stacked with the one end portion on the inside and the other end portion on the outside, the position of the slit for inserting the tongue portion can be visually observed from the outside through the window portion, A self-supporting sheet in which at least a portion of the edge of the window portion forms at least a portion of the edge of the tongue portion, so that the window portion has a configuration that is always open around the tongue portion.

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