Sealed container unit device

Abstract

The present invention relates to an asbestos scattering prevention device, which is a sealed container unit for an asbestos collection, containment, and asbestos scattering prevention device. [Solution] A sealed container unit device is a device in which a sealed container unit and a base unit are connected, and the sealed container unit comprises a shatterproof cover with an open tip and a sealed container that is detachably attached to the tip opening of the shatterproof cover, The shatterproof cover and the sealed container are comprised of an inner cylinder and an outer cylinder rotatably attached to the outside of the inner cylinder, and at least one end of the inner cylinder and the outer cylinder is provided with a A sealed container unit device in which one end of a cylindrical membrane member is fixed to the end of an inner tube and the other end is fixed to the end of an outer tube, and the opening of the sealed container can be freely opened and closed by rotating the outer tube and the end of the membrane member to cause a twist in the membrane member.

Description

[Technical Field]

[0001] The present invention relates to an asbestos scattering prevention device, which is a sealed container unit for asbestos collection, containment, and prevention of asbestos scattering. [Background technology]

[0002] Asbestos has excellent properties such as fire resistance and insulation, and has been used in many buildings. In recent years, large-scale demolition and removal work of buildings containing asbestos has been carried out, causing degraded asbestos to be scattered into the surrounding area, posing a health risk to those who inhale it. Therefore, when removing and containing asbestos, there are legal restrictions in place to prevent health risks from being caused by inhaling asbestos by workers and nearby residents. Since WHO recognized asbestos as a carcinogen in 1980, there has been a global trend toward banning the use of asbestos, and Japan is also moving toward reducing and banning its production and use. The Ministry of the Environment predicts that asbestos emissions from building demolition will peak between 2020 and 2040, and from April 1, 2022, contractors carrying out demolition and renovation work on buildings and other structures will be required to conduct a preliminary investigation into whether or not asbestos is present in any work that involves asbestos, and report the results to the Labor Standards Inspection Office. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2023-095092 [Patent Document 2] JP Patent Publication No. Hei 9-127102 [Non-patent literature]

[0004] [Non-Patent Document 1] Ministry of Health, Labor and Welfare, Labor Standards Bureau, Safety and Health Department, Asbestos Exposure Prevention Measures Summary of the Invention [Problem to be solved by the invention]

[0005] Until now, tools with asbestos collection capabilities were considered to be devices that could be judged to be as effective as or better than wetting and curing measures when working in areas containing asbestos. However, in recent years, measures to prevent the spread of asbestos and other dust particles related to power tools with dust removal capabilities have been reviewed (Study Group on Measures to Prevent Asbestos Exposure in Building Demolition, Renovation, etc., from the Safety and Health Department of the Labour Standards Bureau of the Ministry of Health, Labour and Welfare, June 20, 2023). This report recommends that measures to prevent the spread of asbestos and other dust particles when cutting asbestos and other materials should not be limited to wetting, but should also require the implementation of either "the use of power tools with wetting and dust removal capabilities, or other measures to prevent the spread of asbestos and other dust particles."

[0006] Furthermore, the requirement for determining whether an asbestos collector has sufficient dust collection capabilities is that the tool is equipped with a dust collector and a cover. The dust collector has a HEPA filter and collected asbestos does not leak into the work space or other external environments. The performance of a tool with a dust collector is such that the total fiber concentration in the work area during work does not exceed the asbestos control concentration for the work environment of 0.15 fibers / cm. 3 It has been shown that the level is below .

[0007] Conventionally, to determine whether asbestos fibers are present in a sample of fibrous material such as asbestos, the fibrous material is observed under a microscope and the presence or absence of asbestos fibers or the type of other fibers is determined from the shape, color, etc. For products such as calcium silicate insulation that contain fibrous material, a core cut out from the product or installed component is used as a sample, and if the fibrous material in this sample can be observed with the naked eye, the fibrous material is removed with tweezers or the like and the presence or absence of asbestos fibers, or asbestos fibers and other fibers, is determined using the same microscope observation method as above.

[0008] In order to obtain accurate analysis results, asbestos must be collected by a qualified person in accordance with the manifest, and the amount collected must be about the size of a golf ball (4 cm in diameter) for asbestos-containing spray material, or about 30 blocks for asbestos-containing finishing paint, asbestos-containing insulation material, asbestos-containing building materials, etc., and a method is required to quickly perform microscopic analysis to determine whether or not the material contains asbestos.

[0009] In light of this, the objective of this device is to provide a sealed container unit for power tools that has wetting and dust removal capabilities, not limited to "constant wetting," and can safely and efficiently reduce the dispersion of asbestos and other dust particles, so that optimal dust prevention measures can be taken appropriately in the workplace according to the type of work being done.

[0010] For example, Patent Document 1 discloses a method for drilling a work area by pressing a cover made of absorbent sponge soaked in water against the workpiece, capturing and moistening the drilling chips in a storage tube to prevent them from scattering outside. Furthermore, a method for disposing of stored drill chip sludge involves washing the sludge stored in a partition member with water, and then placing the collected asbestos-containing dust and water in a special bag, which is then sealed and disposed of. While this type of disposal method, which requires constant moistening, is laborious and expensive, the objective of this device is to provide a method for containing asbestos-containing chips in a sealed container unit and provide an asbestos scattering prevention device with a simple yet efficient disposal method.

[0011] In addition, when asbestos fiber bundles are pulverized using the cutting and crushing method of this device, very fine fiber fragments and powder are generated. Asbestos is a mineral with very long and thin fibers, and these characteristics remain even after being pulverized. When chrysotile (white asbestos) is crushed, it breaks into fine fiber fragments, leaving a soft and smooth texture. The surface area of ​​the fiber improves water absorption and heat retention, and it often becomes fine and uniform in shape. When amosite (brown asbestos) is crushed, many sharp needle-like fragments are found. Crocidolite (blue asbestos) breaks into very fine needle-like particles, retaining their sharp shape. Crocidolite fibers are originally long and strong, so they tend to remain uniform in shape even after crushing. Tremolite breaks down into long, thin pieces and powder after crushing. Actinolite is crushed into tiny needle-like fragments and sharp particles. Anthophyllite is produced as long, needle-like particles or powder, which are very strong and are the most likely fibers to remain.

[0012] Based on the above, the purpose of the collection filter used in the cutting and crushing collection method in the sealed container unit of this device is to use a membrane filter to collect fiber bundles so that they can be easily observed under a microscope (Figure 7). [Means for solving the problem]

[0013] The first invention of the present invention is a sealed container unit device comprising a shatterproof cover having an opening at the tip, a sealed container detachably mounted in the tip opening of the shatterproof cover, and a base unit connected to an outer part of the shatterproof cover of the sealed container unit by a base unit coil spring, wherein the shatterproof cover and the sealed container of the sealed container unit surround the periphery of the cutting blade and have a space in which the cutting blade can reciprocate, and the shatterproof cover and the sealed container are connected to the periphery of the opening in the opposite direction to the tip. a sealed container unit device having a sealed container pressing spring between the base unit and the base unit, the sealed container consisting of an inner tube and an outer tube rotatably attached to the outside of the inner tube, a cylindrical membrane member side end fixed to the end of the inner tube and the other end fixed to the end of the outer tube at at least one end of the inner tube and the outer tube, the membrane member end being rotated relative to the outer tube to cause a twist in the membrane member, thereby allowing the opening of the sealed container to be opened and closed freely, and the sealed container and the base unit having a cutting blade drive joint portion through which the cutting blade shaft passes inside.

[0014] The sealed container unit includes independent outer cylinders at both ends of the inner cylinder, and a flexible membrane member that is larger than the outer diameter of the outer cylinder and longer than the diameter of the outer cylinder is provided at one end of one outer cylinder and one end of the inner cylinder, Both ends of the inner cylinder are fixed to one end of the outer cylinder with a membrane member. The sealed container unit according to claim 1, characterized in that the other end of the outer cylinder and the other end of the inner cylinder are fixed with another film member to seal the sealed container.

[0015] 2. The sealed container unit according to claim 1, wherein the sealed container unit is attached to the base unit so as to be able to reciprocate in the left-right direction relative to the base unit along the base unit reciprocating guide and the base unit coil spring.

[0016] After cutting and collecting, the inner and outer tubes of the sealed container are rotated in opposite directions with the fingertips, causing a twist in the elastic membrane, blocking the openings at both ends of the inner tube and sealing the space inside the inner tube, preventing asbestos-containing cutting dust from scattering to the outside, allowing the sample to be collected. [Effects of the Invention]

[0017] In this invention, the scattering prevention cover and sealed container of the sealed container unit surround the cutting blade and provide space for the cutting blade to reciprocate, and the tip opening of the sealed container unit is in close contact with the surface from which asbestos is being removed, preventing worker exposure during work. Furthermore, the asbestos removed by the cutting blade is stored in a sealed container within the sealed container unit, and this sealed container is a removable cassette. By removing the sealed container from the sealed container unit and closing the end with a membrane member, asbestos-containing sawdust can be captured in the sealed container without scattering. Another advantage is that it can be easily collected from the sealed container as a specimen for microscopic observation. [Brief explanation of the drawings]

[0018] [Figure 1] A perspective view of a sealed container unit setting device. [Figure 2] Cross-sectional view showing how sealed containers are stored inside the unit [Figure 3] Cross-sectional view showing the structure of a sealed container [Figure 4] 1 is a cross-sectional view showing an embodiment of a sealed container; [Figure 5] Cross-section of the sealed container and outer cap [Figure 6] Perspective view showing cutting edge types and joint shanks [Figure 7] Collection membrane filter layout DETAILED DESCRIPTION OF THE INVENTION

[0019] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. 1 is a perspective view of a sealed container unit device according to one embodiment of the present invention, with a portion of the left side of a shatterproof cover 110 (described later) broken away to allow the interior to be seen. This sealed container unit comprises a cylindrical shatterproof cover 110 with an opening at its front end (the left end in FIG. 1), a storage filter case 108 that covers the opening at the rear end (the right end in FIG. 1) of the shatterproof cover except for the shaft of the cutting blade and captures scattered asbestos, and a filter case 108 that can be detachably attached to the front end (the left end in FIG. 1) of the shatterproof cover 110 and that can be attached to the rear end (the right end in FIG. 1) of the shatterproof cover 110. The shatter prevention cover 110 has an outer diameter slightly smaller than the inner diameter of the shatter prevention cover 110, and an inner diameter larger than the outer diameter of the cutting blade. The shatter prevention cover 110 is provided with a sealed container 100 for collecting the cut asbestos, and a sealed container pressing spring 106, which serves as a mechanism for pressing the sealed container 100 toward the tip, between the rear end (the right end in FIG. 1) of the sealed container 100 and the inner surface of the shatter prevention cover 110 on the opposite side from the tip opening (the right end in FIG. 1). Also, a membrane foil arrangement member 8 is provided for detachably opening and closing the opening at the rear end (the right end in FIG. 1) of the shatterproof cover. The membrane filter placement member 8 consists of a filter case lid 8e having a joint (a screw in this embodiment) on the outer periphery, a filter case 8d having a peripheral wall on the periphery, and a leak-proof HEPA filter 8c and membrane filter 8b housed in the space within the peripheral wall of the filter case 8d. The method of attaching asbestos fibers to the membrane filter is determined by the shape, size and rotational speed of the blades of the cutting blades inside the scattering prevention cover 110, and the wind force, wind speed and wind pressure. The membrane filter is preferably a circular white cellulose ester membrane filter with a diameter of 47 mm and an average pore size of 0.8 μm, and is used in a holder for circular filter paper with a diameter of 50 mm, with an effective filtration diameter of 47 mm. Furthermore, the center of each member of the membrane filter arrangement member 8 is provided with a hole through which everything except the axis of the cutting blade passes.

[0020] Next, as shown in Figures 1 and 2, the sealed container unit device of this embodiment consists of the sealed container unit, a base unit located a certain distance from the sealing prevention unit on the side where the electric drill is attached (right side), a base unit reciprocating guide 107 that connects the base unit to the sealed container unit, and a base unit coil spring 103.

[0021] 1 and 2, the sealed container 100 of the sealed container unit includes an inner tube 1 having an inner diameter larger than the outer shape of the cutting blade, and cylindrical outer tubes 2 and 3 attached to the outside of the inner tube 1, each having an outer diameter slightly larger than the inner diameter of the shatterproof cover 110 and a length equal to or less than half the length of the inner tube 1 (the length in the left-right direction in FIG. 2), and an inner diameter slightly larger than the outer shape of the inner tube 1, so that the outer tubes can be rotatably attached to the outside of the inner tube 1. The outer cylinder 3 is provided with a rotation-preventing protrusion 3c to encourage rotation of only the inner cylinder 1. An outer cylinder 4 having the same inner diameter as the outer cylinders 2 and 3 is provided between the outer cylinders 2 and 3. The outer cylinder 4 also serves to maintain a state in which both side ends 1a, 1b of the inner cylinder 1 are substantially aligned with one end 5b of the outer cylinder 2 and one end 6a of the outer cylinder 3. Furthermore, the sealed container 8 has cylindrical elastic membranes 5 and 6 attached to both end portions 1a and 1b of the inner cylinder 1, one end portion 2a of the outer cylinder 2, and one end portion 3a of the outer cylinder 3, and these membranes are fixed to one end portion 3a of the outer cylinder 3 and the other end portion of the elastic membrane 6, which is an elastic membrane fixing portion 6b. The elastic membranes 5 and 6 are tubular and have a bag-like shape and are elastic, so that the elastic membranes 5 and 6 are twisted and closed by rotating the outer cylinders 2 and 3. The elastic membranes 5 and 6 are opened by rotating the outer cylinders 2 and 3 in the opposite direction.

[0022] Explaining this with reference to Figure 4, as shown in Figures 4(a) and 4(b), when the outer cylinders 2 and 3 are rotated to prevent twisting of the elastic membranes 5 and 6, and the membranes are housed so that they run along both the outside of the outer cylinders 3 and 4 and the inner cylinder 1 (Figure 4(a)), or along the inner surface of the inner cylinder 1 (Figure 4(b)), the inner cylinder 1 and the outer cylinders 3 and 4 open. Alternatively, although not shown, the elastic membranes 5 and 6 can also be housed so that they run along the outer surfaces of the outer cylinders 2 and 3. Furthermore, when the outer cylinders 3 and 4 are rotated, the elastic membranes 5 and 6 can be bound in a twisted state (Fig. 4(C)). In this way, the elastic membranes 5 and 6 can be easily opened and closed by rotating the outer cylinders 2 and 3. The sealed container 100 is attached by holding the sealed container 100 by hand and inserting it into the shatterproof cover 110 through the opening of the filter storage case 108. It can also be easily removed by performing the reverse operation. Furthermore, by sealing the sealed container 8 from the outside of the elastic membranes 5 and 6 with a plastic or other lid that fits onto the outer cylinders 3 and 4 from the outside, the effect of preventing the removed asbestos from scattering can be enhanced. This lid is attached. This operation is performed after the sealed container is removed from the sealed container unit. In this embodiment, the elastic membranes 5 and 6 are provided on both ends of the sealed container 100, but in another embodiment, only one of the elastic membranes 5 and 6 can be provided on one side of the sealed container 100. In that case, the opening of the sealed container 100 on the side where the elastic membrane is not provided is sealed using the lid material described above.

[0023] In addition, in the one-side end sealing method, after collecting the cutting chips inside the container, the outer cap is fitted onto the protruding outer tube of the sealed container to seal the tip, and by rotating the outer cap, the rotation-preventing protrusion on the rear outer tube prevents the rear outer tube from rotating, twisting the elastic membrane member to seal the space in the inner tube and removing the sealed container, allowing samples to be collected safely and easily without touching the asbestos-containing material.

[0024] In this embodiment, by providing a sealing pressure sponge rubber 102 at the tip (left end) of the scattering prevention cover 110 of the sealed container unit, the adhesion between the scattering prevention part and the asbestos removal part is improved, making it possible to better prevent the removed asbestos from scattering. This allows samples to be collected safely and easily without touching asbestos-containing materials, and the filter holder with a sealable lid is convenient because after collection, the holder can be closed for transport and the filter can be transferred to a case in the testing laboratory.

[0025] In this embodiment, by providing the sealing pressure sponge rubber 102 at the tip (left end) of the scattering prevention cover 110 of the sealed container unit, the adhesion between the scattering prevention part and the asbestos removal part is increased, making it possible to better prevent the removed asbestos from scattering. Furthermore, the effect is further enhanced by soaking the sealing pressure sponge rubber 102 in water. Here, the elastic membrane 4.5 member provided in the sealed container 100 is made of flexible polyethylene and has a thickness of 0.01 to 0.02 mm, and its inner diameter is larger than the circumference of the outer cylinder 2.3 and its length is longer than the diameter of the outer cylinder 2.3. In addition to the above-mentioned method, the elastic membranes 5 and 6 can also be fixed by fitting elastic membrane fitting members 7a and 7b onto the ends of the outer cylinder 2.3. Moreover, adhesive patches for capturing asbestos dust can be attached to the elastic films 5 and 6.

[0026] The sealed container 100 is pressed toward the tip of the shatter prevention cover 110 (the left end in FIG. 1) by the sealed container pressing spring 106, and comes into a state where it protrudes from the tip of the shatter prevention cover 110. On the other hand, during the asbestos removal work, the sealed container 100 is pressed against the surface from which the asbestos is to be removed (usually a wall surface, etc.), and by applying further force, the sealed container 100 is pressed toward the inside of the shatter prevention cover 110, and comes into a position that coincides with the tip of the shatter prevention cover 110. In this state, the asbestos removal work is carried out.

[0027] The storage filter case 108 has a hole in the center through which the cutting blade shaft passes, and the surrounding area is a filter case 108 that prevents the stored asbestos fibers from scattering, so that the removed asbestos does not leak out of the sealed container unit. (Figure 7)

[0028] The inner and outer cylinders are generally made of plastic, which is easy to install, but it is important to select the most suitable material depending on the nature of the dust to be drilled and environmental issues. For example, a cylinder made of paper can be used as a cylindrical carton, making it an environmentally friendly material. Furthermore, a cutting blade drive joint 104, which is a hole through which the cutting blade shaft passes, is provided in the center of the base unit, and holes through which a base unit reciprocating guide 107 passes are provided in the peripheral portion, with the other end (right end) of the base unit reciprocating guide 107 passing through said hole. At this time, a base unit coil spring 103 is passed around the outer periphery of the base unit reciprocating guide 107, with one end (left end) of the base unit coil spring 103 contacting the end face (right end face) of the sealed container housing exterior cover 101 and the other end (right end) contacting the end face (left end face) of the base unit. The base unit coil spring 103 is connected to the electric drill via the electric tool drive joint 105 provided at the end of the cutting blade shaft, and when the electric drill is pressed in the direction of the asbestos removal area (leftward in Figures 1 and 2) during asbestos removal work, the base unit moves leftward together with the cutting blade via the base unit coil spring 103. When the pressure on the electric drill is released, the base unit returns to its original position.

[0029] Next, a method of using the sealed container unit device will be described. The sealed container 100 is attached inside the leading end (left end) of the shatterproof cover 110 of the sealed container unit. The sealed container is attached in a state where it protrudes from the tip (left end) of the shatterproof cover 110 by the sealed container pressing spring 106. In addition, the openings at both ends of the sealed container are opened before attachment. To open the sealed container, the elastic membranes 5 and 6 at both ends are stored inside the sealed container as described above without being twisted. Then, the shaft of the cutting blade is passed through the storage filter case 108 of the sealed container unit and the cutting blade drive joint 104 of the base unit, and the cutting blade is positioned within the internal space of the sealed container unit. In this state, attach the shaft of an electric drill to the shaft of the cutting blade of the sealed container unit device, hold the sealed container unit device by hand, and press the sealed container unit against the surface from which asbestos is to be removed. Pressing the electric drill against the surface from which asbestos is to be removed presses the base unit. The base unit then presses the base unit coil spring 103, further pressing the sealed container unit against the surface from which asbestos is to be removed. Furthermore, the sealed container 100 inside the sealed container unit is pressed from the surface from which the asbestos is to be removed while protruding from the tip (left end) of the shatterproof cover 110, and moves toward the inside of the shatterproof cover 110 until it reaches a position that coincides with the tip of the shatterproof cover 110. In other words, by pressing the sealed container unit device against the surface from which the asbestos is to be removed with an electric drill, the cutting blade removes the asbestos, and at this time, the open ends (left ends) of both the sealed container unit and the sealed container are pressed against the surface from which the asbestos is to be removed, so the removed asbestos does not leak out. After cutting the asbestos, return the electric drill to the position before drilling (the right position) and remove the sealed container unit device. Then, remove the sealed container 100 from the scattering prevention cover 110. Fix the inner cylinder 1 of the sealed container and rotate the outer cylinders 2 and 3 to twist the elastic membranes 5 and 6, closing and blocking the opening of the inner cylinder 1, and trapping the asbestos-containing scattered material inside the sealed container 100. The sealed container 100 contains a relatively large asbestos-containing mass. Then, microscopic asbestos fibers are attached to the membrane filter 8b of the rear membrane filter arrangement member 8. Then, the membrane filter 8b is removed and observed under a microscope. If the asbestos removal work is continued using the same sealed container 100, the inside of the scattering dust prevention cover 110 must be cleaned and the work must be restarted. Once asbestos has been collected in a sealed container, it can be disposed of simply by placing the container in a special asbestos collection bag, or by submitting and transporting a sample to an asbestos investigation agency. The advantage of this method is that it simplifies the pre-processing before microscopic observation by installing a membrane filter container at the rear of the shatterproof cover of the sealed container unit and attaching asbestos fiber bundles to it for observation (Figure 7). Furthermore, care must be taken when ashing samples prior to microscopic observation, as this can change the optical properties of chrysotile, amosite, and crocidolite. Attaching asbestos fiber bundles to a membrane filter facilitates sample preparation (ashing, acid treatment, and flotation / sedimentation) for microscopic observation, simplifies the process of removing impurities during ashing and hydrochloric acid treatment, and makes it easier to detect asbestos. [Industrial Applicability]

[0030] The government is currently conducting general studies on asbestos issues, including identifying the extent of damage, preventing further damage, and addressing public concerns. A comprehensive asbestos countermeasure plan has been compiled as an urgent priority, and it has been decided to consider including matters related to asbestos surveys in the important information disclosure process for real estate transactions. Furthermore, the plan requires real estate agents to explain to buyers, etc., the contents of any asbestos surveys recorded in the building before the contract is concluded. Going forward, more careful and accurate investigations of asbestos use, removal costs, and other factors that affect real estate value are required. In light of these needs, the asbestos-sealed containers in this device are likely to be used. [Explanation of symbols]

[0031] 100 sealed container 101 Sealed container storage outer cover 102 Sealing press sponge rubber 103 Base unit coil spring 104 Cutting blade drive joint 105 Power tool drive joint 106 Sealed container pressure spring 107 Base unit reciprocating guide shaft 108 Filter storage case 109 Sealed container pressure spring storage container 110 Anti-scattering dust cover 111 Outer Cap A 112 Outer cap B 113 Drill Bit 114 Cutting and crushing drill bits 1 Inner cylinder 1 1a Inner cylinder one side end part 1 1b Inner cylinder one side end part 2 2 outer cylinder 2 2a One side end of outer cylinder 1 2b Outer cylinder one side end part 2 3 Outer cylinder 3 3a One side end of outer cylinder 1 3b One side end of outer cylinder part 2 3c Rotation prevention protrusion of outer cylinder 3 3d. Fitting recess of rotation-preventing protrusion of outer cylinder 3 4 outer cylinder 4 cylinder for preventing movement of outer cylinders 2 and 3 5 Elastic membrane 5a Elastic membrane fixing part 5b Elastic membrane fixing part 6 Elastic membrane 6a Elastic membrane fixing part 6b Elastic membrane fixing part 7 Elastic membrane fitting member 7a Elastic membrane fitting part 1 7b Elastic membrane fitting part 2 8 Membrane filter placement component 8a Filter vent 8b Membrane filter 8c HEPA filter 8d filter case 8e Filter case lid 8f Shaft hole for inserting cutting blade

Claims

1. The sealed container unit having an opening at the tip is a sealed container unit device comprising a base unit connected to an outer portion of the shatterproof cover of the sealed container unit by a base unit reciprocating guide and a base unit coil spring; The shatterproof cover and the sealed container of the sealed container unit surround the periphery of the cutting blade and have a space in which the cutting blade can reciprocate, and, The shatterproof cover and the sealed container are connected between the rear end of the sealed container and the peripheral portion of the opening at the rear end of the shatterproof cover in the opposite direction to the front end. The sealed container has an inner tube and an outer tube rotatably attached to the outside of the inner tube, and one end of a cylindrical membrane member is attached to the end of the inner tube at least at one end of the inner tube and the outer tube, The other end is fixed to the end of the outer cylinder, The membrane end is rotated around the outer cylinder to cause a twist in the membrane. This allows the opening of the sealed container to be freely opened and closed, And the sealed container unit The base unit has a shaft of a cutting blade passing through it.

2. The sealed container unit has an independent outer cylinder at each end of the inner cylinder, and a flexible free membrane member that is larger than the outer diameter of the outer cylinder and longer than the hole diameter of the outer cylinder at one end of one outer cylinder and one end of the inner cylinder. Both ends of the inner cylinder are fixed to one end of the outer cylinder with a membrane member.

2. The sealed container unit device according to claim 1, wherein the other end of the outer cylinder and the other end of the inner cylinder are fixed with another film member to seal the inside of the dust collection passage.

3. The sealed container unit device according to claim 1, wherein the sealed container unit is attached to the base unit so as to be able to move back and forth relative to the base unit along the left-right direction.

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