Disposable draining tool and method for manufacturing same

Abstract

The present invention provides a disposable draining tool and a manufacturing method which dispense with a step of separately attaching a string to a draining part, are excellent in productivity, and with which an overwhelming cost reduction can be achieved as compared to the related art. This draining tool comprises: a bottomed tubular draining part 10; an elastic part 20 provided around the entire periphery of the draining part 10 at an open end 11 thereof; and an annular string part 30 provided at an open end 21 of the elastic part 20. The draining part 10 is inserted into a waste receptable of a drain port by crowning, with the elastic part 20, an open edge part of the waste receptable. Foreign matter flowing into the waste receptacle together with drain water is captured by the draining part 10 while the drain water is passed through the draining part 10. By pulling up the string part 30, the elastic part 20 is separated from the open edge part of the waste receptacle, and the draining part 10 with the foreign matter included is removed from the waste receptable. The elastic part 20 is coupled from the open end 11 of the draining part 10, and the string part 30 is coupled from the open end 21 of the elastic part 20 via a part 40.

Description

Disposable Drainage Tool and Method for Manufacturing the Same

[0001] The present invention relates to a disposable drainage tool suitable for preventing foreign substances such as kitchen waste and hair from flowing into a drain pipe, which is set in a garbage receiver such as a drain outlet of a sink in a kitchen or a drain outlet of a bathroom, and a method for manufacturing the same.

[0002] Conventionally, various proposals have been made for this type of drainage tool.

[0003] Among them, for example, Patent Document 1 discloses a drain outlet net in which a string is attached to the upper part of the drain outlet net, and the waste disposal work is made simple and hygienic. Further, Patent Document 2 discloses a drainage bag including a water-permeable bag body and a pair of endless string-like bodies arranged in the bag body, and the bag body is provided so as to contract and its opening is constricted by pulling each string-like body in a predetermined direction at their gripping portions.

[0004] JP-A-2006-291688 JP-A-2003-246404

[0005] By the way, this type of drainage tool is discarded together with the foreign substances every time a predetermined amount of foreign substances accumulates in the drainage part from the viewpoints of simplification of the disposal and replacement work and hygiene, and is not repeatedly used. For this reason, since the consumption number in one household becomes a considerable number, in the market, those packaged in units of about 30 to 100 per bag are sold. From such a situation, cost reduction is required for the drainage tool.

[0006] However, in each of the above conventional drainage tools, a string for taking out the drainage part from the garbage receiver of the drain outlet is manufactured separately from the drainage part, and is attached to the drainage part by means such as fusion, adhesion, or knitting in a separate process.

[0007] Thus, the process of attaching the string to the drainage part, which is essential for manufacturing the drainage tool, is difficult to automate from the viewpoint of profitability because the shapes of the drainage part and the string are each indefinite due to the nature of the material, and thus it has to rely on manual work, which has been a factor hindering cost reduction.

[0008] Further, in the conventional drainage tools, those paying attention to enhancing the strength of the bottom of the drainage part have not been found.

[0009] The present invention was made to solve the above problems, and its purpose is to provide a disposable drainer and a method for manufacturing the same that eliminates the need for a separate process of attaching a string to the drainer part, offers excellent productivity, and achieves overwhelmingly lower costs compared to conventional technology.

[0010] Another objective is to provide a draining device with high strength at the bottom of the draining section, and a method for manufacturing the same.

[0011] To solve the above problems, the draining device disclosed in this application comprises a bottomed cylindrical draining portion and an annular string portion at the open end of the draining portion, wherein the draining portion is inserted into the waste receptacle by having the open end of the draining portion fitted onto the open edge of the waste receptacle of the drain outlet, the draining portion captures foreign matter that flows into the waste receptacle together with the waste and allows the waste to pass through, and the open end of the draining portion is detached from the open edge of the waste receptacle by the string portion being pulled up, and the draining portion is removed from the waste receptacle while containing the foreign matter, wherein the string portion is connected to the open end of the draining portion via a portion.

[0012] The above-mentioned draining device may have a draining section and a string section made of net material or nonwoven fabric.

[0013] Furthermore, the drainer comprises a bottomed cylindrical drain section made of net material, an expandable section made of net material provided around the entire circumference of the open end of the drain section, and an annular string section made of net material provided at the open end of the expandable section, wherein the expandable section is fitted over the open edge of the drain receptacle of the drain outlet, thereby inserting the drain section into the receptacle, the drain section captures foreign matter that flows into the receptacle along with the wastewater and allows the wastewater to pass through, and the string section is pulled up, thereby detaching the expandable section from the open edge of the receptacle and removing the drain section from the receptacle while containing the foreign matter, wherein the expandable section is connected from the open end of the drain section, and the string section may be connected from the open end of the expandable section via a portion of it.

[0014] In the above-mentioned drainer, if the draining portion is made of a net material, the lower part of the draining portion may be made of a yarn with excellent water permeability and a yarn with higher strength than that yarn, or it may have a double-layered structure.

[0015] Furthermore, the manufacturing method of the disposable drainer disclosed herein comprises a bottomed cylindrical drainer made of net material and an annular string made of net material provided at the open end of the drainer, wherein the open end of the drainer is fitted onto the open edge of the drain strainer of the drain outlet, thereby inserting the drainer into the strainer, the drainer captures foreign matter that flows into the strainer with the wastewater and allows the wastewater to pass through, and when the string is pulled up the open end of the drainer detaches from the open edge of the strainer and the drainer encloses the foreign matter. A method for manufacturing a drainer that is removed from the waste receptacle while remaining in place, comprising: a first string knitting step of knitting a first string into a ring shape; a drainer knitting step of knitting two drainer sections in a continuous cylindrical shape from a part of the other end of the ring-shaped first string knitted in the first string knitting step; a second string knitting step of knitting a second string into a ring shape from the other end of the drainer section knitted in the drainer knitting step; and a drainer partial cutting and closing step of cutting the drainer section in the middle of one end and the other end and closing the cut section.

[0016] Furthermore, the manufacturing method of the disposable drainer disclosed herein comprises a bottomed cylindrical drainer made of net material, an expandable part made of net material provided around the entire circumference of the open end of the drainer, and an annular string made of net material provided at the open end of the expandable part, wherein the expandable part is fitted over the opening edge of the drain receptacle of the drain, thereby inserting the drainer into the receptacle, the drainer captures foreign matter flowing into the receptacle with the wastewater and allows the wastewater to pass through, and the expandable part is detached from the opening edge of the receptacle by the string being pulled up. A method for manufacturing a drainer, wherein the drainer portion is removed from the waste receptacle while containing the foreign matter, comprising: a first string portion knitting step of knitting a first string portion into a ring shape; a first expandable portion knitting step of knitting a first expandable portion into a ring shape continuously from a part of the other end of the first string portion knitted in the first string portion knitting step; a drainer portion knitting step of knitting two drainer portions into a cylindrical shape continuously from the other end of the first expandable portion knitted in the first expandable portion knitting step; a second expandable portion knitting step of knitting a second expandable portion continuously from the other end of the drainer portion knitted in the drainer portion knitting step; a second string portion knitting step of knitting a second string portion into a ring shape continuously from a part of the other end of the second expandable portion knitted in the second expandable portion knitting step; and a drainer portion partial cutting and closing step of cutting the drainer portion in the middle of one end and the other end and closing the cut portion.

[0017] In the manufacturing method of the disposable drainer described above, reinforcing threads may be added between the front and rear of the intermediate section during the draining section knitting process.

[0018] Furthermore, the present invention relates to a method for manufacturing a disposable drainer, comprising a bottomed cylindrical drainer made of net material and an annular string made of net material provided at the open end of the drainer, wherein the open end of the drainer is fitted onto the open edge of the drain strainer of the drain outlet, thereby inserting the drainer into the strainer, the drainer captures foreign matter that flows into the strainer with the wastewater and allows the wastewater to pass through, and the string is pulled up so that the open end of the drainer detaches from the open edge of the strainer and the drainer is removed from the strainer while still containing the foreign matter, wherein the lower part of the drainer is cylindrical The invention is characterized by comprising: a process of forming the lower part of the drainage pipe; a process of forming the cylindrical body formed in the lower part of the drainage pipe in the process of forming the lower part of the drainage pipe in the process of forming the lower part of the drainage pipe in the process of forming the lower part of the drainage pipe in the process of forming the lower part of the drainage pipe in the process of forming the upper part of the drainage pipe in the process of forming the upper part of the drainage pipe in the process of forming the upper part of the drainage pipe in the process of forming the upper part of the drainage pipe in the process of forming the upper part of the drainage pipe in the process of forming the upper part of the drainage pipe in the process of forming the upper part of the drainage pipe in the process of forming the upper part of the drainage pipe in the process of forming the upper part of the drainage pipe in the process of forming the upper part of the drainage pipe in the process of forming the upper part of the drainage pipe in the process of forming the upper part of the drainage pipe in the process of forming the upper part of the drainage pipe in the process of forming the lower

[0019] Furthermore, the present invention relates to a method for manufacturing a disposable drainer comprising: a bottomed cylindrical drainer portion made of net material; an expandable portion made of net material provided around the entire circumference of the opening end of the drainer portion; and an annular string portion made of net material provided at the opening end of the expandable portion, wherein the expandable portion is fitted over the opening edge of the drain strainer of the drain outlet, thereby inserting the drainer portion into the strainer, the drainer portion captures foreign matter that flows into the strainer with the wastewater and allows the wastewater to pass through, and the string portion is pulled up, thereby detaching the expandable portion from the opening edge of the strainer and removing the drainer portion from the strainer while containing the foreign matter, wherein the lower part of the drainer portion is knitted into a cylindrical shape. The invention is characterized by comprising: a forming process; a closing and doubling process in which the cylindrical body formed in the lower part forming process is twisted around the axis of the cylindrical body at an intermediate point between one end and the other end to close the intermediate point, and then the other end is turned outward at the intermediate point to form a double structure of the cylindrical body; a drain upper forming process in which the one end and the other end, which are in a superimposed state at the open end of the lower part forming in the closing and doubling process, are integrated and the upper part forming the drain upper into a cylindrical shape from the open end; an expandable part forming process in which the expandable part is formed continuously from the open end of the upper part forming the drain upper in the drain upper forming process; and a cord forming process in which the cord is formed in a ring shape continuously from a part of the other end of the expandable part formed in the expandable part forming process.

[0020] According to the present invention, it is possible to provide a disposable drainer and manufacturing method that eliminates the need for a separate step of attaching a string to the draining part, offers excellent productivity, and achieves a significant reduction in cost compared to conventional technologies.

[0021] Furthermore, it is possible to provide a draining device with high strength at the bottom of the draining section, and a method for manufacturing the same.

[0022] This is a perspective view showing one embodiment of the disposable drainer disclosed in this application. This is a schematic cross-sectional view showing the disposable drainer shown in Figure 1 inserted into the waste catcher of a drain. This is a schematic process diagram illustrating one embodiment of the manufacturing method of the disposable drainer disclosed in this application. This is a schematic process diagram illustrating another embodiment of the disposable drainer disclosed in this application and its manufacturing method. This is a schematic process diagram illustrating yet another embodiment of the disposable drainer disclosed in this application and its manufacturing method.

[0023] The embodiments of the present invention will be described below with reference to the drawings. Note that the following embodiments are examples of embodiments that embody the present invention and are not intended to limit the technical scope of the present invention. Furthermore, common components in the following description and drawings are denoted by the same reference numerals.

[0024] -Configuration of the draining device- As shown in Figure 1, the disposable draining device 1 disclosed in this application comprises a bottomed cylindrical draining section 10, an expandable section 20 provided around the entire circumference of the open end 11 of the draining section 10, and an annular string section 30 provided at the open end 21 of the expandable section 20.

[0025] As shown in Figure 2, the drainer 1 described above has an expandable portion 20 that is fitted onto the opening edge F of the waste receptacle G of the drain, so that the drainer portion 10 is inserted into the waste receptacle G. In this state, foreign matter such as kitchen waste that flows into the waste receptacle G along with the wastewater is captured by the drainer portion 10, and only the wastewater is allowed to pass through the drainer portion 10.

[0026] Continue using the drainer in the manner described above. When a predetermined amount of foreign matter accumulates in the drainer section 10, pulling up the string 30 detaches the telescopic section 20 from the opening edge F of the waste receptacle G, and the opening end 11 of the drainer section 10 is narrowed by the telescopic section 20. This prevents foreign matter from unexpectedly spilling out of the drainer section 10. While holding the string 30 in this state, dispose of the drainer 1 containing the foreign matter, along with the foreign matter, in an appropriate location. In this way, disposal is hygienic because the drainer section 10 and its opening end 11 are not directly touched, and the string 30, which is further away from them, is held. After disposal, insert a new drainer 1 into the waste receptacle G again as described above.

[0027] The draining section 10, the expandable section 20, and the string section 30 of the draining device 1 described above are all made of a net material woven from synthetic fibers. Each part will be described in detail below.

[0028] The drain section 10 is constructed from a knitted fabric made by knitting, for example, a tubular shape using a 20-decitex polyester yarn as a non-elastic yarn, for example, on a circular knitting machine. Here, polyester yarn is suitable for constructing the drain section 10 in terms of heat resistance and acid resistance, and when a 20-decitex polyester yarn is used, a drain section 10 with excellent water permeability can be obtained. The size of the stitches in the drain section 10 is preferably such that it can capture even fine foreign matter while ensuring water permeability. Note that the knitting machine is not limited to a circular knitting machine; a flat knitting machine may also be used.

[0029] The expandable section 20 is formed at the open end 11 of the drainage section 10 by combining an elastic yarn with an inelastic yarn that is more elastic. As the inelastic yarn, for example, a polyester yarn with a thickness of 20 decitex used in the drainage section 10 can be used along with a false-twist yarn with a thickness of 40 decitex produced by the DTY method, and a polyurethane yarn with a thickness of 130 decitex can be added as the elastic yarn. By using these three types of yarn, the expandability and strength of the expandable section 20 can be ensured. Note that the inelastic yarn and elastic yarn are not limited to the examples described above.

[0030] The cord portion 30 is connected to the open end 21 of the expandable portion 20 via a portion 40. Specifically, the expandable portion 20 is knitted using the three types of yarn described above, and when an expandable portion 20 of a predetermined width has been knitted, the knitting operation of the knitting machine is changed so that the expandable portion 20 and the cord portion 30 are discontinuous except for the portion 40, thereby connecting the cord portion 30 to the open end 21 of the expandable portion 20 via the portion 40. The length of the portion 40 to which the expandable portion 20 and the cord portion 30 are connected is approximately one-fifth to one-eighth of the opening circumference of the expandable portion 20. If it is longer than this, the cord portion 30 may get tangled around the outer circumference of the drainage tray G when the drainage portion 10 is inserted into the drainage tray G, making it difficult to grasp.

[0031] As explained above, the disposable drainer 1 disclosed in this application can be manufactured in a series of processes using a knitting machine, from the draining section 10 through the expandable section 20 to the string section 30. Therefore, the process of attaching the string section 30, which was previously required, can be eliminated. As a result, productivity is superior compared to conventional methods, and costs can be drastically reduced.

[0032] In the above embodiment, an example was shown in which an expandable portion 20 is provided between the open end of the drainage portion 10 and the cord portion 30, but it is not necessary to provide the expandable portion 20. In that case, the cord portion 30 is connected to the open end 11 of the drainage portion 10 via a portion of it. Specifically, for example, the drainage portion 10 is knitted with a polyester yarn with a thickness of 20 decitex, and when it reaches the open end 11, the cord portion 30 is connected to the open end 11 via a portion of it by adding two types of yarn: a polyurethane yarn with a thickness of 130 decitex and a false-twisted yarn with a thickness of 40 decitex using the DTY method to the polyester yarn with a thickness of 20 decitex.

[0033] Furthermore, the drainer 1 is not limited to being made of yarn as described above, but may also be made of nonwoven fabric, for example, as shown in Figure 5.

[0034] In other words, as shown in Figures 5(a) and (b), the upper end of the base material 50A, which is made of a nonwoven fabric formed into a tubular shape, is punched out so that the string portion 30 remains (the punched-out portion is shown by diagonal lines), and as shown in Figure 5(c), the lower end of the base material 50A is narrowed and closed by appropriate means such as adhesive bonding.

[0035] -Method for Manufacturing a Drainer- (Embodiment 1) Next, an embodiment of the method for manufacturing the drainer 1 described above will be explained with reference to Figure 3. The manufacturing method according to this embodiment is a method for manufacturing two drainers 1 at once. It will be described in detail below.

[0036] First, as shown in Figure 3(a), a base material 50 in which two drainage sections 10A and 10B are connected, and expandable sections 20A and 20B and cord sections 30A and 30B are attached to the respective open ends 11A and 11B, is knitted, for example, using a circular knitting machine.

[0037] Specifically, in the first cord knitting process, the first cord 30A is knitted in a ring shape using non-elastic yarn and elastic yarn. As the non-elastic yarn, for example, as described above, two types of non-elastic yarn are used: a polyester yarn with a thickness of 20 decitex and a false-twist yarn processed by the DTY method with a thickness of 40 decitex. As the elastic yarn, a polyurethane yarn with a thickness of 130 decitex is used. The diameter of the cord 30A knitted in a ring shape is the same as the diameter of the stretchable parts 20A, 20B and the drainage parts 10A, 10B.

[0038] Next, in the first stretchable section knitting process, the first stretchable section 20A is knitted using the two types of non-elastic yarn and elastic yarn used in the cord section 30A, starting from a part 40A at the other end of the annular first cord section 30A knitted in the first cord section knitting process.

[0039] Next, in the drain section knitting process, the supply of the thicker inelastic yarn and the elastic yarn is stopped, and the drain section 10A located at the bottom of the figure is knitted into a cylindrical shape using only the thinner inelastic yarn. As shown in Figure 3(b), when the lower end of region B-B, which corresponds to the bottom of the drain section 10, is reached, the thicker inelastic yarn is added, and the section between regions B-B is knitted with these two types of inelastic yarn. After that, when the upper end of region B-B is reached, the drain section 10B located at the top of the figure is knitted into a cylindrical shape using only the thinner inelastic yarn. In this way, two sections (10A, 10B) are knitted into a continuous cylindrical shape. Furthermore, since the thicker inelastic yarn is added as a reinforcing yarn between the front and back of the intermediate section (region B-B), a drainer 1 with high strength at the bottom of the drain section 10 can be easily obtained. Note that if a yarn with superior strength is used as the thinner inelastic yarn, it is not necessary to add the thicker inelastic yarn.

[0040] Once two water-draining sections 10 have been knitted, in the second stretch section knitting process, the supply of the thicker non-elastic yarn and elastic yarn is started, and the second stretch section 20B is knitted continuously from the other end of the water-draining section 10B using the two types of non-elastic yarn and elastic yarn.

[0041] Next, in the second cord knitting process, the second cord 30B is knitted in a ring shape using the same non-elastic and elastic threads as the second elastic section 20B, starting from a part 40B at the other end of the second expandable section 20B. This completes a work-in-progress in which two drainers 1 are connected by their respective drainage sections 10A and 10B.

[0042] Finally, with respect to the workpiece formed in the above steps, as shown in FIG. 3(b), the draining portions 10A and 10B are divided at an intermediate portion between one end and the other end thereof at C, and as shown in FIG. 3(c), the divided portions C and C are respectively closed to obtain a finished product. Here, for closing the divided portions C and C, the threads constituting the draining portions 10A and 10B may be welded together, may be fixed with an adhesive, or may be sealed by sewing, and the closing means is arbitrary.

[0043] In the manufacturing method according to the above embodiment, the elastic portions 20A and 20B are knitted, but these elastic portions 20A and 20B may be omitted, and the string portions 30A and 30B may be knitted from the draining portions 10A and 10B, respectively.

[0044] (Second Embodiment) This embodiment is a method for manufacturing a draining tool in which the bottom of the draining portion 10 has a double structure to strengthen the bottom. Hereinafter, it will be described with reference to FIG. 4.

[0045] First, in the lower draining portion knitting step, as shown in FIGS. 4(a) and 4(b), a portion corresponding to the lower part of the draining portion 10 is knitted into a cylindrical shape using one type of inelastic thread, for example, a polyester thread having a thickness of 20 decitex. The length of the thus formed cylindrical body 60 is about twice the length of the lower part of the draining portion 10.

[0046] Next, in the closing doubling step, the cylindrical body 60 knitted in the lower draining portion knitting step is twisted around the axis of the cylindrical body 60 at an intermediate portion 63 between one end portion 61 and the other end portion 62 thereof to close the intermediate portion 63 as shown in FIG. 4(c), and then, as shown in FIG. 4(d), the other end portion 62 is inverted to the outside of the one end portion 61 at the intermediate portion 63 to make the cylindrical body 60 have a double structure. In the present invention, the term "closing" does not mean only a completely closed state, but means a state in which even if there is a gap, foreign matter does not leak or escape from the bottom of the draining tool 1.

[0047] Subsequently, in the upper drainage part knitting process, as shown in Fig. 4(e), at the open end 64 of the lower drainage part 10L knitted in the double-closure process, one end part 61 and the other end part 62 in the overlapping state are sewn and integrated, and at the same time, the upper drainage part 10U is knitted into a cylindrical shape from the open end 64. For the sewing and integration of the one end part 61 and the other end part 62, in addition to the inelastic yarn used for the lower drainage part 10L, it is advisable to use a total of three types of yarns, namely a false twist processed yarn of, for example, 40 decitex in DTY method thicker than this and a polyurethane yarn of 130 decitex. Also, for the upper drainage part 10U, the same yarn as that used for the lower drainage part 10L is used.

[0048] Finally, as shown in Fig. 4(f), similar to the first embodiment, the elastic part 20 is knitted in the elastic part knitting process, and subsequently, the string part 30 is knitted in the string part knitting process to complete the drainage tool 1.

[0049] According to the manufacturing method according to this embodiment, since the bottom of the drainage part 10 is twisted and closed, closing means such as heat welding and sewing become unnecessary.

[0050] In addition, the present invention can be implemented in various other forms without departing from its spirit or main features. Therefore, the above-described embodiments are merely illustrative in all respects and should not be construed in a limiting manner. The scope of the present invention is indicated by the description in the claims and is not restricted in any way by the description in the specification text and drawings. Furthermore, all modifications and changes belonging to the equivalent scope of the claims are within the scope of the present invention.

[0051] 1 Drainage tool 10 Drainage part 10U Upper drainage part 10L Lower drainage part 11 Open end 20 Elastic part 21 Open end 30 String part 40 Part 50 Base material 60 Cylindrical body 61 One end part of the cylindrical body 62 The other end part of the cylindrical body 63 Intermediate part of the cylindrical body 64 Open end of the cylindrical body C Division F Opening edge part G Dust receiver

Claims

1. A disposable draining tool comprising a bottomed cylindrical draining section and an annular string section provided at the open end of the draining section, wherein the open end of the draining section is fitted onto the open edge of the drain receptacle of a drain outlet, thereby inserting the draining section into the receptacle, the draining section captures foreign matter flowing into the receptacle along with the wastewater and allows the wastewater to pass through, and the string section is pulled up, thereby detaching the open end of the draining section from the open edge of the receptacle and removing the draining section from the receptacle while containing the foreign matter, wherein the string section is connected to the open end of the draining section via a portion.

2. A drainer according to claim 1, characterized in that the draining portion and the string portion are made of net material.

3. A draining device according to claim 1, characterized in that the draining portion and the string portion are made of nonwoven fabric.

4. A disposable drainer comprising a bottomed cylindrical drain section made of net material, an expandable section made of net material provided around the entire circumference of the open end of the drain section, and an annular string section made of net material provided at the open end of the expandable section, wherein the expandable section is fitted over the open edge of the drain receptacle of the drain outlet, thereby inserting the drain section into the receptacle, the drain section captures foreign matter flowing into the receptacle with the drain and allows the drain to pass through, and the string section is pulled up, thereby detaching the expandable section from the open edge of the receptacle and removing the drain section from the receptacle while containing the foreign matter, wherein the expandable section is connected from the open end of the drain section, and the string section is connected from the open end of the expandable section via a portion.

5. A drainer according to claim 2 or 4, characterized in that the lower part of the draining portion is made of a thread with excellent water permeability and a thread with higher strength than the said thread.

6. A drainer according to claim 2 or 4, characterized in that the lower part of the draining portion has a double structure.

7. A method for manufacturing a drainer comprising a bottomed cylindrical drainer made of net material and an annular cord made of net material provided at the open end of the drainer, wherein the open end of the drainer is fitted onto the open edge of the drain receptacle of the drain outlet, thereby inserting the drainer into the receptacle, capturing foreign matter that flows into the receptacle with the drainage and allowing the drainage to pass through, and the open end of the drainer is pulled up, thereby detaching the open end of the drainer from the open edge of the receptacle and removing the drainer with the foreign matter still contained within, comprising: a first cord forming step of forming a first cord into an annular shape; a drainer forming step of forming two continuous cylindrical drainer sections from a part of the other end of the annular first cord formed in the first cord forming step; and a second cord forming step of forming a second cord into an annular shape from a part of the other end of the drainer formed in the drainer forming step. A method for manufacturing a disposable drainer, characterized by including a step of partially cutting and closing the drainer portion, which involves dividing the drainer portion at an intermediate point between one end and the other end, and closing the divided portion.

8. A method for manufacturing a drainer comprising a bottomed cylindrical drainer made of net material, an expandable part made of net material provided around the entire circumference of the open end of the drainer, and an annular cord made of net material provided at the open end of the expandable part, wherein the expandable part is fitted over the opening edge of the drain receptacle of the drain outlet, thereby inserting the drainer into the receptacle, the drainer captures foreign matter flowing into the receptacle with the drain and allows the drain to pass through, and the cord is pulled up, thereby detaching the expandable part from the opening edge of the receptacle and removing the drainer with the foreign matter still contained within, comprising a first cord knitting step of knitting a first cord into an annular shape, and a first expandable part knitting step of knitting a first expandable part in an annular shape continuously from a part of the other end of the annular first cord knitted in the first cord knitting step, A method for manufacturing a disposable drainer, comprising: a drainer section forming step of forming two drainer sections in a continuous cylindrical shape from the other end of the first drainer section formed in the first stretcher section forming step; a second stretcher section forming step of forming a second stretcher section in a continuous cylindrical shape from the other end of the drainer section formed in the drainer section forming step; a second cord section forming step of forming a second cord section in a continuous ring shape from a part of the other end of the second stretcher section formed in the second stretcher section forming step; and a drainer section partial division and closing step of dividing the drainer section at an intermediate point between one end and the other end, and closing the divided section.

9. A method for manufacturing a disposable drainer according to claim 7 or 8, characterized in that reinforcing threads are added between the front and rear of the intermediate portion during the drainer portion knitting step.

10. A method for manufacturing a drainer comprising a bottomed cylindrical drainer made of net material and an annular string made of net material provided at the open end of the drainer, wherein the open end of the drainer is fitted onto the open edge of the drain receptacle of the drain outlet, thereby inserting the drainer into the receptacle, capturing foreign matter that flows into the receptacle with the drainage and allowing the drainage to pass through, and the string is pulled up so that the open end of the drainer is detached from the open edge of the receptacle and the drainer is removed from the receptacle while containing the foreign matter, comprising: a drainer lower part assembly step of assembling the lower part of the drainer into a cylindrical shape; a closure doubling step of twisting the cylindrical body assembled in the drainer lower part assembly step around the axis of the cylindrical body at an intermediate part between one end and the other end to close the intermediate part, and then inverting the other end to the outside of the one end at the intermediate part to make the cylindrical body a double structure, A method for manufacturing a disposable drainer, comprising: a drainer upper assembly step of integrating the one end and the other end that are in a superimposed state at the open end of the drainer lower part assembled in the double-closure step, and assembling the drainer upper part into a cylindrical shape from the open end; and a string assembly step of continuously assembling the string part into a ring shape from a part of the open end of the drainer upper part assembled in the drainer upper assembly step.

11. A method for manufacturing a drainer comprising a bottomed cylindrical drainer made of net material, an expandable part made of net material provided around the entire circumference of the open end of the drainer, and an annular string made of net material provided at the open end of the expandable part, wherein the expandable part is fitted over the opening edge of the drain receptacle of the drain outlet, thereby inserting the drainer into the receptacle, the drainer captures foreign matter flowing into the receptacle with the drain and allows the drain to pass through, and the string is pulled up, thereby detaching the expandable part from the opening edge of the receptacle and removing the drainer with the foreign matter still contained within, the method comprising: a drainer lower part assembly step of assembling the lower part of the drainer into a cylindrical shape; a closure doubling step of twisting the cylindrical body assembled in the drainer lower part assembly step around the axis of the cylindrical body at an intermediate point between one end and the other end to close the intermediate point, and then inverting the other end to the outside of the one end at the intermediate point to create a double-layered structure of the cylindrical body, A method for manufacturing a disposable drainer, comprising: a drainer upper assembly step of integrating the one end and the other end that are in a superimposed state at the open end of the lower part of the drainer assembled in the double-closure step, and assembling the upper part of the drainer into a cylindrical shape from the open end; an expandable part assembly step of continuously assembling the expandable part from the open end of the upper part of the drainer assembled in the drainer upper assembly step; and a string part assembly step of continuously assembling the string part into a ring shape from a part of the other end of the expandable part assembled in the expandable part assembly step.

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