JP4724439B2 - Dust collection bag for vacuum cleaner and method for manufacturing the same - Google Patents

Description

  The present invention relates to a dust bag for use in a vacuum cleaner and a method for manufacturing the same.

In the following Patent Document 1, as the dust collection bag for the electric vacuum cleaner, a filter paper having air permeability is formed in a bag shape, and an opening is formed in a substantially central portion of the bag, and the opening for attaching the cleaner to the opening is formed. A paper to which a base paper is fixed is disclosed.
Such a dust collection bag is formed in a plurality of layers including an outer layer bag made of filter paper having air permeability and at least one inner layer bag. When manufacturing a dust bag, the paper material of the above-mentioned multiple layers is formed into a cylindrical shape, the lateral side portion is folded into a step to form a gusset portion, and both ends of the cylindrical body are folded back to form an adhesive. Generally, it is formed into a bag shape by closing with, for example.
Shokai 60-171253 “Dust Collection Bag for Electric Vacuum Cleaner”

If it is the said prior art, there exist the following subjects.
(A) Thick nonwoven fabrics are often used as the material for the inner layer bag. If the outer layer material and the thick nonwoven fabric are overlapped to form the folded portions at the left and right ends of the cylindrical body, the inner layer material increases the thickness of the folded portion, which makes it difficult to form the folded portion. .
In recent years, dust-proof bags for vacuum cleaners have been diversified and upgraded, and the functions required for dust-proof bags have the strength to withstand strong suction force, as well as multifunctional functions such as deodorization and antibacterial functions. Is desired. In order to realize such multi-functions, it is only necessary to manufacture a dust bag by stacking inner layer materials that exhibit those functions, but if one inner layer material is thin, it is stacked on multiple layers. The thickness of the inner layer material as a whole increases, and the same problem occurs.

(B) When it is going to manufacture the said multifunctional and high quality dust bag, there exists a subject to which manufacturing cost becomes high. In particular, when the thickness of the folded portion is increased, damage due to adhesion failure of the adhesive is likely to occur, and there has been a demand for a method of producing a high quality at a low cost.
The adhesive used to form the folded portion is usually a water-soluble vinyl acetate adhesive, and since this adhesive is water-soluble, it can be absorbed by the nonwoven fabric to perform the adhesive function. However, there is a problem that it takes time to dry. In particular, in a dust collection bag having a folded portion with a large thickness, when the internal pressure of the bag increases due to dust absorption, air tends to leak, and there may be inconveniences such as a decrease in dust absorption force.

This invention is made | formed in view of the said subject, and the objective of this invention is providing the dust collection bag for vacuum cleaners which can solve the said subject, and its manufacturing method.
An example of a specific purpose is as follows.
(A) Provided is a dust collecting bag for a vacuum cleaner that solves the problem that the thickness of the folded portion is increased in a folding type dust collecting bag for an electric vacuum cleaner provided with an outer layer material and an inner layer material.
(B) Provided is a method by which the dust bag for an electric vacuum cleaner can be manufactured efficiently and at low cost.
(C) Even when an inner layer material that cannot exhibit sufficient adhesion performance when using a water-soluble adhesive is used, sufficient adhesion can be achieved at the folded portion of the dust bag.
In addition, the subject of invention other than having described above, its solution means, and its effect are demonstrated in detail in description in the specification mentioned later.

Although the present invention can be expressed in many ways, for example, typical ones are configured as follows.
The first invention is directed to each cylinder by folding and housing the inner member tube forms the inside of the outer layer member tube forms a gusset portion forming a stepped to the side of its respective tubular configuration, the left and right ends of the cylindrical form And a folded portion that forms the bag into a bag shape,
The gusset portion region is a region between the stepped outer fold line forming the gusset portion and the inner fold line,
At least one of the cut portions of the inner layer material cylindrical body that is the range of the layer material that is folded back at the folded portion and that is the gusset portion region is removed,
By removing such a cut portion, the inner layer material cylindrical body is provided with a protruding piece extending in the axial direction in the region between the two inner folding lines ,
Further, the cut portion of the inner layer cylindrical member is removed so that the difference between the thickness of the gusset portion region and the thickness of the region between the two inner folding lines is reduced.

The second invention is characterized in that, in the first invention, all of the cut portions of the inner-layer material cylindrical body are removed.

The third method of manufacturing the vacuum cleaner for collecting dust bag of the present invention accommodates the inner layer member tube forms the inside of the outer layer member tube forms a gusset portion forming a stepped to the side of its respective tubular configuration, each cylinder A folded portion that folds each cylindrical shape into a bag shape by folding the left and right ends of the shape;
The gusset portion region is a region between the stepped outer fold line forming the gusset portion and the inner fold line,
At least one of the cut portions of the inner layer material cylindrical body that is the range of the layer material that is folded back at the folded portion and that is the gusset portion region is removed,
By removing such a cut portion, the inner layer material cylindrical body is provided with a protruding piece extending in the axial direction in the region between the two inner folding lines ,
Furthermore, it is a method for manufacturing a dust bag for an electric vacuum cleaner, wherein the cut portion of the inner layer material cylindrical body is removed so that the difference between the thickness of the gusset portion region and the thickness of the region between the two inner folding lines is reduced ,
Look including the step of forming at least one of the inner member and the outer layer material and the step of continuously feeding the strip, a gusset portion overlapping the supplied inner layer material and the outer layer member,
In at least one inner layer material, after removing the excision region corresponding to the excision part using the excision device so that the connection part is left for each dust bag in the process of continuously supplying the belt shape, the gusset forming process is performed. wherein the portion corresponding to the cut portion of the inner layer material gusset region by supplying the inner layer material was prevented folded.

Method for producing a fourth for an electric vacuum cleaner dust bag of the present invention accommodates the inner layer member tube forms the inside of the outer layer member tube forms a gusset portion forming a stepped to the side of its respective tubular configuration, each cylinder A folded portion that folds each cylindrical shape into a bag shape by folding the left and right ends of the shape;
The gusset portion region is a region between the stepped outer fold line forming the gusset portion and the inner fold line,
At least one of the cut portions of the inner layer material cylindrical body that is the range of the layer material that is folded back at the folded portion and that is the gusset portion region is removed,
By removing such a cut portion, the inner layer material cylindrical body is provided with a protruding piece extending in the axial direction in the region between the two inner folding lines ,
Furthermore, it is a method for manufacturing a dust bag for an electric vacuum cleaner, wherein the cut portion of the inner layer material cylindrical body is removed so that the difference between the thickness of the gusset portion region and the thickness of the region between the two inner folding lines is reduced ,
Look including the step of forming at least one of the inner member and the outer layer material and the step of continuously feeding the strip, a gusset portion overlapping the supplied inner layer material and the outer layer member,
In at least one inner layer material, after forming the excisable region corresponding to the excision part using the excisable region forming device so as to leave the connection part for each dust bag in the process of continuously supplying in a strip shape , After the gusset forming step, the excisable region is removed by pulling so that a portion corresponding to the excised portion of the inner layer material does not exist in the gusset portion region.

  According to a fifth invention, in the fourth invention, the excisable region is formed by forming a cut line such as a perforation.

Hereafter, each structure of the said 1st invention- 5th invention is demonstrated.
In the first invention, it is preferable that the inner layer material removed in the gusset portion region has a large thickness, and the thickness of the gusset portion becomes too large when folded at the folded portion.
Conversely, even if the gusset portion is folded into a plurality of layers, the inner layer material having a small total thickness may not be cut off.
Various shapes of the projecting piece formed by removing the inner layer material of the gusset portion region are conceivable. The shape of the projecting piece is preferably a square shape.
In the first invention, the inner layer material may not be removed in the entire length range of the folded layer material. For example, when the folded portion is formed by folding the left and right ends of the cylindrical body n times, even when only the inner layer material corresponding to the first turn is removed, the folded portion is compared with the case where the inner layer material is not removed at all. This is because the thickness of the portion can be reduced.

In the third invention, as a method of forming the inner layer material having the ablation region, the ablation region 21 is formed while the inner layer material is being transported using excision devices 37, 39, and 40 as shown in FIG .
In the fourth invention, the “resectable region” refers to a region that can be removed by pulling . Examples of the method for forming the “resectable region” include a method for easily removing a predetermined region by heat treatment, chemical treatment, and the like in addition to the method for forming the score line described in the fifth invention. As a method for removing the excisable region after the gusset forming step, an operator may perform it manually, or the automatic excision device may be used to remove the excisable region.

In the fifth invention, examples of the “cut line” include a form in which a cut such as a perforation line, a broken line, and an alternate long and short dash line is provided. Generally, the cut line is provided so as to surround the ablation region. In consideration of the tension applied to the inner layer material during conveyance, the cutting ratio (ratio between the connecting portion and the cutting portion) of the perforation line, the broken line, etc. is adjusted so that the cutting line does not break.
In the cutting step of cutting for each dust bag, the connecting portion is cut at approximately a half position (about bisected position) in the axial direction of the cylindrical body 7 .

The effects of each invention will be described below.
If it is 1st invention, since the at least 1 sheet of inner layer material is removed in the gusset part area | region in the range of the layer material folded in the said folding | turning part, the thickness of the gusset part area | region of a folding | turning part can be made small. Therefore, the folded portion can be satisfactorily formed even with a dust bag using a thick inner layer material.
Further, since the inner layer material is left as a projecting piece in the region that is not the gusset portion, it is possible to reduce or eliminate the difference in thickness between the gusset portion region and the region that is not the gusset portion that are inevitably thick due to the folding of the outer layer material. . Therefore, the level | step difference which generate | occur | produces by the difference in the thickness of a folding | returning part can be made small or can be eliminated, and the adhesiveness of a folding | returning part can be improved.
The household vacuum cleaner is preferred to be compact, and the dust bag used for the vacuum cleaner is also required to be lightweight and thin. Therefore, the significance of the present invention that can reduce the thickness of the folded portion is great. .

  If it is 2nd invention, since all the inner layer materials of the said gusset part area | region are removed, the inner layer material does not exist in the gusset part area | region in the range of the layer material turned back. Therefore, the gusset portion region is only the thickness of the outer layer material folded to form a step, and the thickness of the gusset portion region in the folded portion is reduced regardless of the thickness and number of inner layer materials used. Can do.

If it is 3rd invention, since the said cutting | disconnection area | region will be removed using a cutting | disconnection apparatus during conveyance of an inner layer material, before cutting in a gusset part, a cutting | disconnection area | region can be removed easily from an inner layer material. Moreover, even if it is the inner-layer material which removed the cutting | disconnection area | region, since it can supply continuously to the said gusset formation process by the remaining connection part, manufacture of a dust bag can be made efficient.

According to the fourth invention, the tensile strength of the inner layer material can be increased as compared with the case where the cut region is formed, and the occurrence of inconveniences such as cutting of the inner layer material can be suppressed. Therefore, since the inner layer material can be continuously and stably supplied to the gusset forming step, the production of the dust bag can be made more efficient.
Further, by removing the excisable region, the thickness of the gusset portion region of the folded portion can be reduced, and the folded portion can be favorably formed even in a dust collection bag using a thick inner layer material.

According to the fifth aspect of the invention, the excisable region is formed by forming a cut line, so that the excisable region can be formed easily and at low cost. Moreover, since the part which does not enter the cut line remains, the tensile strength of the inner layer material can be increased as compared with the case where the cut region is formed, and the occurrence of inconveniences such as cutting of the inner layer material can be suppressed.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
FIG. 1 is a perspective view of a vacuum cleaner dust bag showing a first embodiment of the present invention, and FIG. 2 is a rear view thereof.
As shown in FIGS. 1 and 2, the dust bag 1 has a three-layer structure of an outer layer material 2 made of filter paper, a first inner layer material 3a made of a nonwoven fabric, and a second inner layer material 3b also made of a nonwoven fabric. It consists of a bag.

A suction port 4 is opened on the upper side of the dust collection bag 1, and a cover 5 made of cardboard is attached to the suction port 4. A hole 6 is opened in the cover 5 at a position substantially coincident with the suction port 4 of the three-layer bag.
The bag body 1a hermetically seals the openings 8 and 8 (see FIG. 5) at both ends of the cylindrical body in which the layer materials are stacked in three layers, and folds back both end regions to form a folded portion 14, and the folded portion 14 is A bag is formed by bonding with an adhesive.

FIG. 3 is a perspective view showing the cylindrical body 7 of the outer layer material 2.
The cylindrical body 7 is formed in a cylindrical shape by bonding the planar outer layer material 2 at a body portion 9 extending in the axial direction of the cylindrical body 7, and two gusset portions on both lateral sides of the cylindrical body 7. 16 is formed.

FIG. 4 is a perspective view showing the cylindrical body 11 of the first inner layer material 3a and the second inner layer material 3b.
FIG. 5A is a perspective view showing a state in which the two cylindrical bodies 11 are accommodated in the cylindrical body 7 of the outer layer material, and FIG. 5B is a view taken along the line B-B in FIG. is there.

  The cylindrical bodies 11 and 11 of the inner layer material 3 are also formed into a cylindrical shape by the body portion 9, and two-stage gusset portions 16 are formed on both lateral sides. Moreover, as shown in FIG. 5, a cylindrical body is accommodated in order of the outer layer material 2, the 1st inner layer material 3a, and the 2nd inner layer material 3b from the outer side. That is, the respective sizes are set so that the cylindrical bodies 11, 11 of the first inner layer material 3 a and the second inner layer material 3 b can be accommodated inside the cylindrical body 7 of the outer layer material 2.

As shown in FIG. 4 and FIG. 5 (B), in the region L of the layer materials 3, 3a, 3b folded back by the first folding of the folded portion 14 (see FIG. 1), the region W of the gusset portions 16, 16 Corresponding inner layer materials 3a and 3b are removed as the cut portions 13 and 13. That is, the inner layer materials 3a and 3b are removed in the region W between the stepped outer fold line 18 and the inner fold line 19 that form the gusset portions 16 and 16.
The length of the cut-out portions 13 and 13 in the axial direction of the cylindrical body 7 is L. By removing the cut-out portions 13 and 13, the rectangular projecting pieces 15 and 15 are vertically moved in the central region. Formed. Note that, as shown in FIGS. 10A to 10C, the folded portion 14 is configured by folding the range of the length L of the projecting pieces 15 and 15.

  As shown in FIG. 5B, the region W of the gusset portions 16 and 16 has a structure in which two steps are formed, and therefore six outer layer materials are folded. On the other hand, in the region X that is not the gusset portions 16, 16, there are a total of six sheets including two outer layer materials, two first inner layer materials, and two second inner layer materials. That is, by not folding the inner layer materials 3a and 3b in the regions W of the gusset portions 16 and 16, the difference in thickness between the region W and the region X can be reduced, and the inner layer materials 3a and 3b are disposed in the region X. The difference in thickness can be further reduced by leaving the projecting pieces 15 and 15.

Further, it is preferable that there is no gap d between the lateral ends of the projecting pieces 15 and 15 and the inner folding lines 19 and 19, or even if there is a gap, it is narrow so that a large step cannot be formed. Thereby, the level | step difference of the width direction of the folding | returning part 14 can be made small, and adhesiveness can be improved.
As described above, in the range L that is turned back by the first turn, the two inner layer materials 3a and 3b are removed in the region W of the gusset portions 16 and 16, and the inner layer materials 3a and 3b are removed. The thick inner layer materials 3a and 3b are used by providing the projecting pieces 15 and 15 left extending in the axial direction of the cylindrical body 7 in the region X (the central region in FIG. 5) that is not the gusset portions 16 and 16. Even if it exists, the folding | returning part 14 can be formed favorably.

Next, the manufacturing method of the dust collection bag which concerns on this embodiment based on FIG. 6 is demonstrated.
First, the inner layer material is continuously supplied in a strip shape (S101), and a predetermined range of the inner layer material that is folded into the gusset portion is removed as a cutting region using the cutting device in the middle of the supply (S102).
The inner layer material from which the cut region has been removed is continuously supplied in a band shape to the bonding step (S103). In the bonding step, the outer layer material and the inner layer material are bonded together, and thereafter, the processing can be performed as a unified layer material.

  Next, the bonded portion in the bonding step is dried by a dryer (S104), and necessary characters, symbols, and drawings are printed on a predetermined surface of the dust bag (S105), and the suction port is opened (S106). ), A predetermined stage gusset portion is formed using the gusset portion forming apparatus (S107).

After forming the gusset part, the layered material is formed into a cylinder by bonding the body part (S108), and the cylindrical layered material is cut for each dust bag (S109), and a rubber adhesive is used. Then, the openings at both the left and right ends are sealed and the folded portions are formed at both the left and right ends (S110).
Thereafter, the base paper is adhered to the suction port and bonded (S111), and the series of manufacturing steps is completed.

As described in the third aspect of the present invention, in this embodiment, a cutting device for removing a cutting region from the inner layer material is provided before the outer layer material and the inner layer material are bonded.

FIG. 7 is a diagram showing an example of the configuration from the supply process (S101) to the bonding process (S102) by each layer material supply roller.
As shown in FIG. 7, the outer layer material 2 supplied from the outer layer material supply roller 31 is coated on the inner surface side of the outer layer material 2 by an adhesive application device (not shown) while being conveyed by the rollers 34a and 34b. Is done.

  The first inner layer material 3 a supplied from the first inner layer material supply roller 32 and the second inner layer material 3 b supplied from the second inner layer material supply roller 33 are overlapped by the overlapping roller 38, and the cutting device 37 ( In FIG. 7, it is indicated by a cutting roller). In the excision device 37, the excision region 21 (shown by oblique lines) as shown in FIG. 9 is cut off and supplied to the bonding step 35 while maintaining the state of being continuously conveyed in a band shape by the connecting portion 20. In the bonding process 35, the two inner layer materials 3 a and 3 b and the outer layer material 2 are bonded at the position of the bonding roller 36.

FIG. 9 is a plan view of the inner layer material showing the excision region 21 to be removed by the excision process.
The cutting form of the cutting device 37 is set so that the region of the gusset portion 16 in the gusset portion forming step (S107) to be performed later is exactly the cutting region 21.

  In FIG. 9, the area of the excision region 21 is drawn narrowly, but the excision region 21 is set so that the inner layer material folded into the gusset portion 16 can be removed while securing the strength with which the inner layer material can be conveyed at the connecting portion 20. . The actual cut region 21 is larger in the width direction than shown in FIG. Moreover, the length of the cutting direction 21 in the conveyance direction is set to 2L.

  Further, in the configuration shown in FIG. 7, an example in which the excision device 37 is provided at a position where the first inner layer material 3a and the second inner layer material 3b overlap is shown, but only the first inner layer material 3a has an excision region. When 21 is formed, the resecting device 40 may be provided at a position before being overlapped with the second inner layer material 3b. Similarly, when the excision region 21 is formed only in the second inner layer material 3b, the excision device 39 may be provided at a position before being overlapped with the first inner layer material 3a.

FIG. 8 is a view showing an example of a gusset portion forming apparatus used in the gusset portion forming step (S107).
As shown in FIG. 8, after the layer material 44 in which the inner layer materials 3a and 3b and the outer layer material 2 are overlapped is formed in a substantially cylindrical shape, it is conveyed so as to wrap the wavy guide plates 43 and 43. A pair of pressing rollers 41 and 41 are pressed from both lateral sides of the shape to form gusset portions folded in two steps on both lateral sides of the layer material 44. The rollers 41 and 41 have mold surfaces 42 and 42, and the mold surfaces 42 and 42 are pressing surfaces having a triangular cross section similar to the guide plates 43 and 43.

  Various configurations of the gusset part forming apparatus are known, and instead of the gusset part forming apparatus shown in FIG. 8, another gusset part forming apparatus may be adopted. After the gusset portion is formed, the cylindrical member is formed by bonding the layer material 44 at the body portion 9 (see FIGS. 3 and 4) (S108).

The cutting step (S109) is a step of cutting the cylindrical body for each dust bag.
As shown in FIG. 9, the length of the inner layer material required to make one dust collection bag is set to E in this embodiment, and is cut for each length E, and one dust collection bag is obtained. Each cylinder is configured.
The cut region 21 is divided into two equal parts in the axial direction of the cylindrical body 7 by the cutting line 23, and the portions of the connecting portion 20 distributed to the respective dust collection bags become projecting pieces 15 and 15 (see FIG. 4). Is set to L. This length L is equal to the first turn-back length L of the turn-back portion 14 shown in FIG.
By setting in this way, the dust collection bag can be manufactured without wasting the layer material when the cut region 21 is cut for each dust collection bag.

A rubber-based adhesive is used as the adhesive used in the folded portion forming step (S110) of the left and right end openings 8 and 8 (see FIG. 5). The location where the rubber adhesive is applied is applied to the inner peripheral surface that can seal the left and right openings 8 and 8. By adopting such a configuration, it is possible to prevent leakage of fine dust.
Rubber adhesives include natural rubber, styrene-butadiene rubber, butadiene rubber, butyl rubber, ethylene-propylene polymer, chloroprene rubber, nitrile rubber, chlorosulfonated polyethylene, polysulfide rubber, urethane rubber, epichlorohydrin rubber, acrylic rubber. Examples thereof include fluorine rubber and silicone rubber.

FIGS. 10A to 10C are diagrams illustrating an example of a folding procedure of the folding unit 14 performed in the folding unit manufacturing step (S110).
In the state before turning back in FIG. 10A, the thickness t of the range L of the layer material that is turned back by the first turn is smaller than the thickness T of the region where the inner layer material is in the gusset portion.
From this state, after applying an adhesive to a predetermined portion of the layer material to be folded, as shown in FIG. 10 (B), the first folding is performed at a position of about L / 2 from the end side of the opening 8, As shown in FIG. 10C, the folded portion 14 is formed by performing the second folding. Since the inner layer material does not exist in the gusset portion of the folded portion 14, it can be formed thin. The formation of the folded portion is automatically performed by a machine. FIG. 10C shows a state after being pressed in order to reduce the bulk of the folded portion 14.

(Second Embodiment)
Next, a vacuum cleaner dust bag according to a second embodiment of the present invention will be described.
FIG. 11 is a plan view of the inner layer material showing the excisable region 24 formed by the process of forming the excisable region. The same parts as those in FIG.
The excisable region 24 is surrounded by perforations 25a and 25b, and is configured so that the excision region 21 described in FIG. 9 can be easily removed later. The perforations 25a and 25b can remove the resectable region 24 when the pulling force becomes a certain level or more.
In the present embodiment, the perforation 25a parallel to the transport direction may be a linear cutting line instead of the perforation, and only the perforation 25b parallel to the width direction may be formed. With this configuration, the portion of the excisable region 24 that is parallel to the transport direction has already been cut, so that the excisable region 24 can be easily excised in the excisable region removing step.

FIG. 12 is a flowchart showing an example of the dust bag manufacturing method according to the second embodiment.
The dust bag manufacturing method of the present embodiment is characteristic in comparison with the flowchart shown in FIG. 6 in that the excision step (S102) is replaced with an excisable region formation step (S102A), and a cutting step (S109). This is that an excisable region removing step (S109A) for removing the excisable region 24 is provided during the folded portion forming step (S110).
Note that the portion to be bonded by the bonding step (S103) is performed while avoiding a portion that hinders removal of the excisable region 24.
Further, as a method of forming the resectable region 24 during the conveyance of the inner layer material, the perforations 25a, 25b and the like are formed at the same position instead of the resecting devices 37, 39, 40 as shown in FIG. It can be configured by providing a resectable region forming device.

The above embodiment is merely an example of the present invention, and the configuration can be appropriately changed within the gist of the present invention.
For example, in the above-described embodiment, the inner layer material inserted into the gusset portions 16 and 16 is configured not to be a single sheet, but the inner layer material having a small layer thickness among the plurality of inner layer materials accommodated in the dust bag is a gusset. A configuration that remains in the parts 16 and 16 is also conceivable.

In the said embodiment, although demonstrated taking the nonwoven fabric as an example as an inner layer material, it is also possible to comprise an inner layer material using materials other than a nonwoven fabric. It is also possible to overlap the number of inner layer materials to two or more.
Moreover, the flowcharts shown in FIGS. 6 and 12 are shown as an example, and the order of each process can be changed as appropriate. For example, it is possible to bring the bonding step immediately before the gusset forming step.

FIG. 1 is a perspective view showing a first embodiment of a dust bag for a vacuum cleaner according to the present invention. FIG. 2 is a back view of the vacuum cleaner dust bag according to the present embodiment. FIG. 3 is a perspective view of a cylindrical body of the outer layer material in the present embodiment. FIG. 4 is a perspective view of a cylindrical body of the inner layer material in the present embodiment. FIG. 5A is a perspective view of a cylindrical body, and FIG. 5B is a view taken along line BB in FIG. 5A. FIG. 6 is a flowchart showing an example of the dust bag manufacturing method according to the present embodiment. FIG. 7 is a diagram showing an example of the configuration from each layer material supply roller to the bonding step. FIG. 8 is a schematic view showing an example of a gusset portion forming apparatus. FIG. 9 is a plan view of the inner layer material showing the excision region removed by the excision process. FIGS. 10A to 10C are diagrams illustrating an example of a procedure for forming the folded portion. FIG. 11 is a plan view of the inner layer material showing the excisable region formed by the excisable region forming step. FIG. 12 is a flowchart showing an example of the dust bag manufacturing method according to the second embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Vacuum cleaner dust bag, 2 ... Outer layer material, 3a ... First inner layer material, 3b ... Second inner layer material, 7 ... Outer layer material cylindrical shape, 11 ... Inner layer material cylindrical shape, 13 ... Cut part DESCRIPTION OF SYMBOLS 14 ... Folding part, 15 ... Protruding piece, 16 ... Gazette part, 18 ... Outer folding line, 19 ... Inner folding line, 20 ... Connection part, 21 ... Resection area | region, 24 ... Resectable area | region, 25a, 25b ... Perforation, 37, 39, 40 ... cutting device, W ... gusset region, X ... region between two inner fold lines .

Claims (5)

The inner layer material tubular body is accommodated inside the outer layer material tubular body , and each tubular body is formed into a bag shape by folding back the left and right end portions of each tubular body, and a gusset portion formed with a step on the side of each tubular body. And a folded portion to
The gusset portion region is a region between the stepped outer fold line forming the gusset portion and the inner fold line,
At least one of the cut portions of the inner layer material cylindrical body that is the range of the layer material that is folded back at the folded portion and that is the gusset portion region is removed,
By removing such a cut portion, the inner layer material cylindrical body is provided with a protruding piece extending in the axial direction in the region between the two inner folding lines ,
Furthermore, the dust bag for an electric vacuum cleaner, wherein the cut portion of the inner-layer cylindrical member is removed so that the difference between the thickness of the gusset portion region and the thickness of the region between the two inner folding lines is reduced. The dust bag for a vacuum cleaner according to claim 1, wherein all of the cut portions of the inner layer material cylindrical body are removed. The inner layer material tubular body is accommodated inside the outer layer material tubular body , and each tubular body is formed into a bag shape by folding back the left and right end portions of each tubular body, and a gusset portion formed with a step on the side of each tubular body. And a folded portion to
The gusset portion region is a region between the stepped outer fold line forming the gusset portion and the inner fold line,
At least one of the cut portions of the inner layer material cylindrical body that is the range of the layer material that is folded back at the folded portion and that is the gusset portion region is removed,
By removing such a cut portion, the inner layer material cylindrical body is provided with a protruding piece extending in the axial direction in the region between the two inner folding lines ,
Furthermore, it is a method for manufacturing a dust bag for an electric vacuum cleaner, wherein the cut portion of the inner layer material cylindrical body is removed so that the difference between the thickness of the gusset portion region and the thickness of the region between the two inner folding lines is reduced ,
Look including the step of forming at least one of the inner member and the outer layer material and the step of continuously feeding the strip, a gusset portion overlapping the supplied inner layer material and the outer layer member,
In at least one inner layer material, after removing the excision region corresponding to the excision part using the excision device so that the connection part is left for each dust bag in the process of continuously supplying the belt shape, the gusset forming process is performed. method for producing a vacuum cleaner for collecting dust bag, characterized in that as no folded portions corresponding to the cut portion of the inner layer material gusset region by supplying the inner layer material. The inner layer material tubular body is accommodated inside the outer layer material tubular body , and each tubular body is formed into a bag shape by folding back the left and right end portions of each tubular body, and a gusset portion formed with a step on the side of each tubular body. And a folded portion to
The gusset portion region is a region between the stepped outer fold line forming the gusset portion and the inner fold line,
At least one of the cut portions of the inner layer material cylindrical body that is the range of the layer material that is folded back at the folded portion and that is the gusset portion region is removed,
By removing such a cut portion, the inner layer material cylindrical body is provided with a protruding piece extending in the axial direction in the region between the two inner folding lines ,
Furthermore, it is a method for manufacturing a dust bag for an electric vacuum cleaner, wherein the cut portion of the inner layer material cylindrical body is removed so that the difference between the thickness of the gusset portion region and the thickness of the region between the two inner folding lines is reduced ,
Look including the step of forming at least one of the inner member and the outer layer material and the step of continuously feeding the strip, a gusset portion overlapping the supplied inner layer material and the outer layer member,
In at least one inner layer material, after forming the excisable region corresponding to the excision part using the excisable region forming device so as to leave the connection part for each dust bag in the process of continuously supplying in a strip shape , After the gusset forming step, the excisable region is removed by pulling so that the portion corresponding to the cut portion of the inner layer material does not exist in the gusset portion region. . The method of manufacturing a dust bag for a vacuum cleaner according to claim 4, wherein the excisable region is formed by forming a cut line such as a perforation.

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