Sealed container unit device

Abstract

The present invention relates to an asbestos dispersion prevention device, and more particularly to a sealed container unit for asbestos collection, containment, and dispersion prevention devices. [Solution] A sealed container unit device comprising a sealed container unit and a base unit connected together, wherein the sealed container unit consists of a splash-proof cover with an open tip and a sealed container that is detachably attached to the opening at the tip of the splash-proof cover. The aforementioned splash-proof cover and sealed container consist of an inner cylinder and an outer cylinder rotatably mounted on the outside of the inner cylinder, and at least one end of the inner cylinder and the outer cylinder A sealed container unit device in which one end of a cylindrical membrane member is fixed to the end of an inner cylinder and the other end to the end of an outer cylinder, and the end of the membrane member is fixed to the outer cylinder to twist the membrane member, thereby allowing the opening of the sealed container to be opened and closed.

Description

Technical Field

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

Background Art

[0002] Asbestos has excellent functions such as fire resistance and heat insulation, and has been used in many buildings. In recent years, the demolition and removal work of asbestos-containing buildings has been carried out on a large scale, and deteriorated asbestos has scattered around, causing health damage problems for those who inhaled it. Therefore, during the removal and containment of asbestos, regulations are in place to prevent health damage caused by workers and nearby residents inhaling asbestos. Since the WHO recognized asbestos as a carcinogen in 1980, the world has been moving towards banning the use of asbestos, and Japan is also moving towards reducing and banning its production and use. The Ministry of the Environment predicts that the emission volume of asbestos due to building demolition will peak around 2020 - 2040, and since April 1, 2022, construction contractors who carry out demolition and renovation work on buildings, etc. are obliged to investigate in advance the presence or absence of asbestos in asbestos-related construction work and report the results to the Labor Standards Inspection Office.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Non-Patent Documents

[0004]

Non-Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

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

[0006] Furthermore, the requirements for determining whether an asbestos dust collector has sufficient dust collection capabilities are that it be a covered tool equipped with a dust collection device. The dust collection device must have a HEPA filter to prevent collected asbestos from leaking into the work area or other external environments. As a performance requirement for a tool with a dust collection device, the total fiber concentration in the work area during work should be 0.15 fibers / cm³, which is the asbestos control concentration for the work environment. 3 It has been shown that it will be below that.

[0007] Conventionally, to determine whether or not asbestos fibers are present in fibers of a fibrous material such as asbestos, a method has been used in which the fibrous material is observed under a microscope, and the presence or absence of asbestos fibers or other types of fibers is determined from the shape and color of the fibers. Furthermore, for products such as calcium silicate insulation materials that contain fibrous material, a core cut from the product or installed component is used as a sample, and if the fibrous material in this sample is visible to the naked eye, the fibrous material is removed with tweezers or the like, and the presence or absence of asbestos fibers, or the presence or absence of asbestos fibers and other fibers, is determined by the same microscopic observation method as described above.

[0008] Furthermore, in order to obtain accurate analytical results, it is necessary to use a method for collecting asbestos samples that is carried out by qualified personnel in accordance with the manifest, with a sample size of approximately a golf ball (4 cm in diameter) for asbestos-containing sprayed materials, and approximately 30 brams for asbestos-containing finishing coatings, asbestos-containing insulation materials, and asbestos-containing building materials, and to rapidly perform microscopic analysis to determine the presence or absence of asbestos.

[0009] In light of these considerations, this device aims to provide a sealed container unit for power tools that has both wetting and dust removal capabilities, rather than being limited to "continuous wetting," so that optimal dust emission prevention measures can be appropriately taken in the workplace according to the work content, thereby providing a safe and efficient sealed container unit that can reduce the emission of asbestos and other dust.

[0010] For example, Patent Document 1 discloses a method in which, when drilling a work area, a cover made of a water-absorbing sponge is pressed against the workpiece to perform drilling, and the drilling chips are collected in a storage cylinder and moistened, thereby suppressing their scattering to the outside. Furthermore, the method for disposing of the collected drilling chip sludge involves washing the sludge stored in a partition member with water, and then placing the recovered asbestos-containing dust water into a special bag, sealing it, and disposing of it. Such disposal methods, which involve constantly moistening the material for disposal, are time-consuming and costly. The objective of this device is to provide a method for sealing asbestos-containing drilling chips in a sealed container unit, and to provide an efficient asbestos scattering prevention device that is easy to dispose of.

[0011] Furthermore, when asbestos fiber bundles are crushed using the cutting and crushing method of this device, very fine fibrous fragments and powder are produced. Asbestos is a very long and thin fibrous mineral, and its characteristics remain even after crushing. Chrysotile (white asbestos), when crushed, becomes fine fibrous fragments, retaining a flexible and smooth texture. The surface area of ​​the fibers improves water absorption and heat retention, and they often become fine and uniform in shape. Amosite (brown asbestos), when crushed, often shows many needle-shaped, sharp fragments. Crocidolite (blue asbestos), when crushed, becomes very fine needle-shaped particles, maintaining a sharp shape. Because crocidolite fibers are originally long, thin, and strong, they remain uniform in shape even after crushing. Tremolite, after being crushed, becomes elongated fragments or powder. Actinolite is crushed into fine needle-like fragments or sharp particles. Anthophyllite is produced as long, needle-shaped particles or powder, resulting in extremely high strength and making it the most durable fiber.

[0012] Based on the above, the sampling filter used in the method for collecting the cutting and crushing material in the sealed container unit of this device is a membrane filter, with the aim of easily observing the fiber bundles 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 splash-proof cover having an opening at its tip, a sealed container detachably mounted inside the tip opening of the splash-proof cover, and a base unit connected to the outer portion of the splash-proof cover of the sealed container unit by a base unit coil spring, wherein the splash-proof cover and sealed container of the sealed container unit surround the area around the cutting blade and have space for the cutting blade to move back and forth, and the area around the opening opposite to the tip The present invention provides a sealed container unit device having a sealing container pressing spring between the two parts, wherein the sealed container consists of an inner cylinder and an outer cylinder rotatably mounted on the outside of the inner cylinder, and a cylindrical membrane member is fixed to at least one end of the inner cylinder and the other end to the outer cylinder, and the opening of the sealed container can be opened and closed by rotating the outer cylinder to twist the membrane member, and the sealed container and the base unit have a cutting blade drive joint portion through which the shaft of the cutting blade passes.

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

[0015] The sealed container unit is mounted on 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, as described in claim 1.

[0016] After cutting and collecting the material, the inner and outer cylinders of the sealed container can be rotated in opposite directions with a fingertip to twist the elastic membrane, thereby blocking the openings at both ends of the inner cylinder and sealing the space inside the inner cylinder. This prevents the asbestos-containing cutting dust from scattering to the outside, allowing for collection. This is the most important feature of the device (Figure 4). [Effects of the Invention]

[0017] In this invention, the dust-preventing cover and sealed container of the sealed container unit surround the area around the cutting blade and have space for the cutting blade to move back and forth, and the tip opening of the sealed container unit is in close contact with the surface from which the asbestos is removed, thereby preventing exposure to workers during work. Furthermore, the asbestos removed by the cutting blade is stored in the sealed container within the sealed container unit, and since this airtight sealed container is a detachable cassette, the sealed container can be removed from the sealed container unit and its end closed with a membrane member, thereby collecting the asbestos-containing cutting dust inside the sealed container without scattering it. In addition, it has the effect of easily collecting samples from the sealed container for use as specimens for microscopic observation. [Brief explanation of the drawing]

[0018] [Figure 1] Perspective view of a sealed container unit set device [Figure 2] Cross-sectional view showing a method of storing a sealed container in a unit [Figure 3] Cross-sectional view showing the structure of a sealed container [Figure 4] Cross-sectional view showing an embodiment of a sealed container [Figure 5] Cross-sectional view of a sealed container and an outer cap [Figure 6] Perspective view showing the type of cutting blade and the joint shank [Figure 7] Layout diagram of a collection membrane filter

Mode for Carrying Out the Invention

[0019] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view of a sealed container unit device according to an embodiment of the present invention, and is a perspective view in which a part on the left side of a scattering prevention cover 110 described later is broken to show the inside. This sealed container unit includes a cylindrical scattering prevention cover 110 having an opening at its tip (the left end in FIG. 1), a storage filter case 108 that closes a portion other than the axis of the cutting blade at the opening at the rear end (the right end in FIG. 1) of the scattering prevention cover and collects scattered asbestos, and a sealed container 100 that can be detachably mounted inside the opening at the tip (the left end in FIG. 1) of the scattering prevention cover 110, has an outer diameter slightly smaller than the inner diameter of the scattering prevention cover 110, and has an inner diameter larger than the outer shape of the cutting blade. The sealed container 100 collects the cut asbestos, and includes a sealed container pressing spring 106 between the rear end of the sealed container 100 (the right end in FIG. 1) and the inner surface in the opposite direction (the right end in FIG. 1) of the opening at the tip of the scattering prevention cover 110 as a mechanism for pressing the sealed container 100 in the tip direction. Further, a membrane foil filter arrangement member 8 that detachably opens and closes the opening at the rear end (the right end in FIG. 1) of the scattering prevention cover is provided. ​The membrane filter arrangement member 8 consists of a filter case lid 8e having a joint (screw in this embodiment) on its outer edge, a filter case 8d having a peripheral wall on its periphery, and a leak-preventing HEPA filter 8c and a membrane filter 8b housed in the space within the peripheral wall of the filter case 8d. Furthermore, the method of adhering asbestos fibers to the membrane filter is determined by the wind force, wind speed, and wind pressure resulting from the shape, size, and rotation speed of the cutting blades inside the dust-preventing cover 110. Furthermore, it is desirable to use a circular white cellulose ester membrane filter with a diameter of 47 mm and an average pore size of 0.8 μm, with a holder for circular filter paper with a diameter of 50 mm, resulting in an effective filtration diameter of 47 mm. Furthermore, each member of the membrane filter arrangement member 8 has a hole in its center through which everything except the cutting blade axis 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 at a certain distance from the sealing prevention unit on the electric drill mounting side (right side), a base unit reciprocating guide 107 connecting the base unit and the sealed container unit, and a base unit coil spring 103.

[0021] Figure 2 shows a cross-sectional view of a part of the component. As will be explained with reference to Figures 1 and 2, the sealed container 100 of the sealed container unit comprises an inner cylinder 1 having an inner diameter larger than the outer diameter of the cutting blade, and cylindrical outer cylinders 2 and 3 attached to the outside of the inner cylinder 1, having an outer diameter slightly larger than the inner diameter of the splash-proof cover 110, and a length of 1 / 2 or less of the length of the inner cylinder 1 (length in the left-right direction in Figure 2), and an inner diameter slightly larger than the outer diameter of the inner cylinder 1, so as to be rotatably attached to the outside of the inner cylinder 1. Furthermore, the outer cylinder 3 is provided with a rotation-preventing projection 3c to encourage rotation of only the inner cylinder 1. In addition, an outer cylinder 4 with 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 the two side ends 1a and 1b of the inner cylinder 1 are approximately aligned with one side end 5b of the outer cylinder 2 and one side end 6a of the outer cylinder 3. Furthermore, the sealed container 8 is provided with cylindrical elastic membranes 5 and 6 on both ends 1a and 1b of the inner cylinder 1, one end 2a of the outer cylinder 2, and one end 3a of the outer cylinder 3, and the elastic membrane fixing portion 6b, which is the other end of the elastic membrane 6, is fixed to one end 3a of the outer cylinder 3. The elastic membranes 5 and 6 are in the shape of a bag-like tube and are elastic, so when the outer cylinders 2 and 3 are rotated, the elastic membranes 5 and 6 are twisted and closed. When the outer cylinders 2 and 3 are rotated in the opposite direction, the elastic membranes 5 and 6 are opened.

[0022] To explain this using Figure 4, as shown in Figures 4(a) and (b), the outer cylinders 2 and 3 are rotated to prevent twisting of the elastic membranes 5 and 6, and they are then stored so that they follow both the outside of the outer cylinders 3 and 4 and the inner cylinder 1 (Figure 4(a)), or so that they follow the inner surface of the inner cylinder 1 (Figure 4(b)), causing the inner cylinder 1 and outer cylinders 3 and 4 to open. In addition, although not shown in the figures, the elastic membranes 5 and 6 can also be stored so that they follow the outer surfaces of the outer cylinders 2 and 3. Furthermore, by rotating the outer cylinders 3 and 4, the elastic membranes 5 and 6 can be closed in a twisted state (Figure 4(C)). In this way, the opening and closing of the elastic membranes 5 and 6 can be easily performed by rotating the outer cylinders 2 and 3. The sealed container 100 is installed by holding the sealed container 100 in one hand and inserting it into the splash-proof cover 110 through the opening of the filter storage case 108. The container can also be easily removed by performing the reverse operation. Furthermore, the effectiveness of preventing the scattering of removed asbestos can be enhanced by sealing the sealed container 8 with a lid material made of plastic or the like that fits onto the outer cylinders 3 and 4 from the outside, from the outside of the elastic membranes 5 and 6. This lid material is attached. This operation is performed after removing the sealed container from the sealed container unit. In this embodiment, elastic membranes 5 and 6 are provided at both ends of the sealed container 100. However, in other embodiments, either the elastic membrane 5 or 6 can be provided on only one side of the sealed container 100. In that case, the opening of the sealed container 100 on the side without the elastic membrane is sealed using the aforementioned lid material.

[0023] Furthermore, in the method of sealing one end, after collecting the cutting chips inside the container, the outer cap is fitted onto the protruding outer cylinder of the sealed container to seal the tip, and by rotating the outer cap, the rotation-preventing projection of the rear outer cylinder prevents the rear outer cylinder from rotating, thereby twisting the elastic membrane member and sealing the space inside the inner cylinder, allowing the sealed container to be removed, and thus a sample can 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, and the scattering of removed asbestos can be further prevented. This allows for safe and easy sample collection without touching asbestos-containing materials. The filter holder with a resealable lid is convenient because it allows for transport after collection by closing the lid of the holder, and the filter can be transferred to a case in the laboratory.

[0025] 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 increased, further preventing the scattering of the removed asbestos. 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 with 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 opening of the outer cylinder 2.3. In addition to the method described above, another method for fixing the elastic membranes 5 and 6 is to fit and fix the elastic membrane fitting members 7a and 7b to the ends of the outer cylinder 2.3. Furthermore, adhesive adhesives for capturing asbestos dust can be attached to the elastic membranes 5 and 6.

[0026] The sealed container 100 is pressed by the sealed container pressing spring 106 toward the tip of the anti-scattering cover 110 (the left end in Figure 1), causing it to protrude from the tip of the anti-scattering cover 110. On the other hand, during asbestos removal work, the sealed container 100 is pressed against the surface from which the asbestos is to be removed (usually a wall, etc.), and by applying further force, the sealed container 100 is pressed toward the inside of the anti-scattering cover 110, bringing it to a position that coincides with the tip of the anti-scattering cover 110. Asbestos removal work is then performed in this state.

[0027] The aforementioned 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, thus preventing the removed asbestos from leaking out of the sealed container unit. (Figure 7)

[0028] While plastic is commonly used for the inner and outer cylinders due to its ease of installation, it is important to select the optimal material according to the nature of the dust being drilled and environmental concerns. For example, a cylindrical shape formed from paper can be used, which is an environmentally friendly material. Furthermore, a cutting blade drive joint 104, which is a hole through which the shaft of the cutting blade passes, is provided in the central part of the base unit, and a hole is provided in the surrounding part for passing the base unit reciprocating guide 107, and the other end (right end) of the base unit reciprocating guide 107 is passed through this hole. At this time, a base unit coil spring 103 is passed around the outer circumference of the base unit reciprocating guide 107, with one end (left end) of the base unit coil spring 103 in contact with the end face (right end face) of the sealed container storage outer cover 101, and the other end (right end) in contact with the end face (left end face) of the base unit. The base unit coil spring 103 is connected to the electric drill via an electric tool drive joint 105 located at the end of the cutting blade's shaft. 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 to the leftward along with the cutting blade via the base unit coil spring 103. When the pressure from the electric drill is released, the base unit returns to its original position.

[0029] Next, the method of using the sealed container unit device will be explained. The sealed container 100 is installed inside the tip (left end) of the splash-proof cover 110 of the sealed container unit. The sealed container is attached to the splash-proof cover 110 by the sealed container pressing spring 106, with the container protruding from the tip (left end). The openings at both ends of the sealed container are opened before attachment. To open the openings, the elastic membranes 5 and 6 at both ends are stored inside the sealed container as described above, without twisting them. 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, positioning the cutting blade within the internal space of the sealed container unit. In this state, the shaft of the electric drill is attached to the shaft of the cutting blade of the sealed container unit device, the sealed container unit device is held by hand, and the sealed container unit is pressed against the surface from which the asbestos is to be removed. Pressing the electric drill against the surface from which the asbestos is to be removed pushes the base unit. Then, the base unit pushes the base unit coil spring 103, further pressing the sealed container unit against the surface from which the asbestos is to be removed. Furthermore, the sealed container 100 inside the sealed container unit is pressed against the surface from which the asbestos is removed, starting from a position where it protrudes from the tip (left end) of the anti-scattering cover 110. As a result, it moves inward towards the inside of the anti-scattering cover 110 and comes into position to coincide with the tip of the anti-scattering cover 110. In other words, by pressing the sealed container unit device against the surface from which the asbestos is removed with an electric drill, the cutting blade removes the asbestos. At this time, both the open end (left end) of the sealed container unit and the sealed container are pressed against the surface from which the asbestos is removed, so the removed asbestos does not leak out. After cutting the asbestos, return the electric drill to its position before drilling (right side) and remove the sealed container unit. Then remove the sealed container 100 from the dust-proof 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, thereby sealing the asbestos-containing airborne material inside the sealed container 100. A relatively large asbestos-containing lump is stored inside the sealed container 100. Next, microscopic asbestos fibers are attached to the membrane filter 8b of the rear membrane filter placement member 8. Then, the membrane filter 8b is removed and observed under a microscope. If asbestos removal work is to be continued using the same sealed container 100, the dust-proof cover 110 must be cleaned before the work can be resumed. The easiest way to dispose of asbestos collected in a sealed container is to either place the entire container into an asbestos-specific storage bag and dispose of it, or to submit and transport the sample to an asbestos testing agency. By loading a membrane filter container into the rear of the splash-proof cover of the sealed container unit and attaching asbestos fiber bundles to it for observation, the pre-treatment before microscopic observation can be simplified, which is an advantage. (Figure 7) Furthermore, care must be taken during the ashing process as a pretreatment for microscopic observation, as it may alter the optical properties of chrysotile, amosite, and crocidolite. By attaching asbestos fiber bundles to a membrane filter, sample preparation for microscopic observation (ashing, acid treatment, and flotation / sedimentation) becomes easier, simplifying the process of removing impurities during ashing and hydrochloric acid treatment, and facilitating asbestos detection. [Industrial applicability]

[0030] Regarding the asbestos problem, the government as a whole is generally considering measures such as understanding the extent of the damage, preventing further damage, and addressing public anxiety. As an urgent issue, comprehensive asbestos countermeasures have been compiled, and within this framework, it has been decided to consider making matters related to asbestos surveys a subject of important disclosure during real estate transactions. Furthermore, it has been stipulated that real estate agents must explain to buyers, etc., before the conclusion of a contract, the results of a survey on the presence or absence of asbestos in the building, if recorded, must be explained. In the future, it will be necessary to conduct more careful and accurate surveys regarding the status of asbestos use, removal costs, and other matters that affect the value of real estate. In light of these circumstances, it is expected that the asbestos sealed container of this device will be utilized. [Explanation of symbols]

[0031] 100 sealed container 101 Sealed Container Storage Outer Cover 102 Sealing pressure sponge rubber 103 Base Unit Coil Spring 104 Cutting blade drive joint location 105 Power tool drive joint location 106 Sealed container compression spring 107 Base unit reciprocating guide shaft 108 Filter Storage Case 109 Sealed container, pressure spring storage container 110 Dustproof cover 111 Outer cap A 112 Outer cap B 113 Drill bits 114 Cutting and Grinding Drill Bits 1 Inner cylinder 1 1a One end of the inner cylinder, part 1 1b One end of the inner cylinder, part 2 2 Outer cylinder 2 2a One end of the outer cylinder, part 1 2b One end of the outer cylinder, part 2 3 Outer cylinder 3 3a One end of the outer cylinder, part 1 3b One end of the outer cylinder, part 2 3c Protrusion for preventing rotation of outer cylinder 3 3d Outer cylinder 3 Rotation-preventing protrusion Fitting recess 4. Outer cylinder 4. Cylinder for preventing movement of outer cylinders 2 and 3. 5. Elastic membrane 5a Elastic membrane fixing portion 5b Elastic membrane fixing portion 6. Elastic membrane 6a Elastic membrane fixing portion 6b Elastic membrane fixing portion 7 Elastic membrane fitting member 7a Elastic membrane fitting member 1 7b Elastic membrane fitting member part 2 8 Membrane filter placement member 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. A sealed container unit having a sealed container detachably attached to the inside of the opening at the front and a membrane filter placement member detachably attached to the opening at the rear end, This is a sealed container unit device in which a base unit is connected to a base unit reciprocating guide and a base unit coil spring. The aforementioned sealed container unit consists of a splash-proof cover with an open tip and a sealed container that is detachably attached to the opening at the tip of the splash-proof cover, and the splash-proof cover and the sealed container surround the cutting blade and have a space through which the cutting blade can move back and forth. Furthermore, the splash-proof cover has a sealing container pressing spring between the front end and the rear end of the opening, and the sealing container consists of an inner cylinder and an outer cylinder rotatably mounted on the outside of the inner cylinder, and one end of a cylindrical membrane member is attached to the end of the inner cylinder at least one end of the inner cylinder and the outer cylinder, The other end is then secured to the end of the outer cylinder. The end of the aforementioned membrane member is twisted by rotating the outer cylinder to create a twist in the membrane member. The opening of the sealed container is made openable and closable. Furthermore, the sealed container unit device is characterized in that the shaft of the cutting blade passes through the inside of the sealed container unit and the base unit.

2. The sealed container unit comprises an inner cylinder with independent outer cylinders at both ends, and one end of one of the outer cylinders and one end of the inner cylinder have a flexible membrane member that is larger than the outer diameter of the outer cylinder and longer than the diameter of the outer cylinder. The inner cylinder is fixed to one end of the outer cylinder with a membrane member. The sealed container unit according to claim 1, further characterized in that the other outer cylinder end and the inner cylinder end are fixed with the other membrane member to seal the sealed container.

3. The sealed container unit according to claim 1, characterized in that 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.

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