JP2008055390A - Dust collector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To develop a dust collector that can be used for removing a harmful substance such as asbestos and has a space where a sufficient airflow is obtained before and after the filter and means for automatically removing clogging of the filter and enables the filter to be exchanged without an exposure of the filter itself and accumulated dust. <P>SOLUTION: Dust collector units each of which keeps one filter mounted on one box housing the one filter are connected in a separable manner. A separated dust collector unit is tightly sealed. The filter is installed at 10 to 30 degrees with respect to a horizontal plane via membrane made of an elastic material. The last filter is a HEPA filter or an ULPA filter. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

<Configuration 1>
The present invention relates to a dust removing device with a filter that is disposed between a dust collecting tip and a suction device and removes dust collected by the dust collecting tip, and more particularly, one or more filters. Each dust removal unit is mounted on an independent housing, and the dust collection tip and the first dust removal unit are connected by the first connection means, and each dust removal unit is connected by the intermediate connection means. The present invention relates to a dust removing device characterized in that the unit and the suction device are connected by the last connecting means and can be disconnected.
<Configuration 2>
Further, the present invention relates to the dust removing apparatus according to the first configuration, wherein the filter attached to the last dust removing unit is a HEPA filter or a ULPA filter.
<Configuration 3>
Furthermore, the first connecting means, the intermediate connecting means and the last connecting means are connected with sealing means for hermetically sealing the pipe by expanding a sealing tube provided in the pipe. It is composed of a connection fixing means having a fixing tube for fixing the connection state by pressing the fitting portion from the periphery by being wound around the fitting portion between the pipes and being expanded. The present invention relates to the dust removing apparatus according to Configuration 1 or Configuration 2.
<Configuration 4>
The filter of each dust removal unit is related with the dust removal apparatus of the structure 1 or the structure 2 or the structure 3 with which the housing of each dust removal unit is mounted | worn through the film body which consists of an elastic body.
<Configuration 5>
The filter of each dust removal unit is attached with the angle of 10 degrees-30 degrees with respect to a horizontal surface, It is related with the dust removal apparatus of the structure 1 or the structure 2 or the structure 3 or the structure 4 characterized by the above-mentioned.
<Configuration 6>
Structure 3 characterized in that the housing of each dust removing unit is made of a transparent material, and the pipe and connecting means for connecting each dust removing unit are made of a transparent material except for the sealing tube and the fixing tube. Alternatively, the present invention relates to the dust removing device described in the configuration 4 or the configuration 5.
<Configuration 7>
The distance between each dust removal unit is fixed by mounting the housing of each dust removal unit on a common pedestal by the fixing means of the dust removal unit, or the configuration 1 or 2 or 3 or The present invention relates to the dust removing device described in the configuration 4, the configuration 5, or the configuration 6.

  An example of the basic configuration of a conventional dust removing device is shown in FIG. In the dust removing device a of FIG. 19, a primary filter f1, a secondary filter f2, and a tertiary filter f3 are provided at the subsequent stage of the intake port a1 of the housing c provided with the intake port a1 and the exhaust port a2. An intake fan fn is provided at the rear stage. When an air supply pipe (not shown) of a dust collection tip (not shown) is connected to the intake port a1 of such a dust removing device a and the fan fn is operated, the dust collection tip (not shown). ), Air containing dust is supplied, passes through the intake port a1 in the direction of the arrow, is sequentially filtered by the primary filter f1, the secondary filter f2, and the tertiary filter f3, and the purified air is exhausted. Exhaust from a2.

  In the dust removing device a, the three filters of the primary filter f1, the secondary filter f2, and the tertiary filter f3 are used as described above. Of these, the primary filter f1 is a pre-filter. It is called and has a role of collecting coarse particles having a particle diameter of 7 to 13 μm or more, and a collection rate of usually about 60 to 90% by weight method is often used. The weight method is a type of method for measuring the dust removal performance of a filter. The weight of dust before passing is taken as the denominator, and the value obtained by subtracting the weight of dust after passing from the weight of dust before passing is taken as the numerator. The numerical value of the case is displayed in%. Therefore, for example, in a certain filter, if the weight of dust before passing is 100 g and the weight of dust after passing is 20 g, the dust removal performance of the filter is 80% by weight method. This gravimetric method is often used for measuring the dust removal performance of a prefilter. The primary filter f1 is usually composed of non-woven fabric, glass wool, porous metal, or the like.

  The secondary filter f2 is also called a medium performance filter, and has a role of collecting particles having a particle diameter of about 1 to 5 μm, and the collection rate is usually about 60 to 95% by colorimetric method. It is done. The colorimetric method is also a kind of method for measuring the dust removal performance of the filter, and is a method for comparing the degree of contamination between the filter paper that has passed through the dust before passing and the filter paper that has passed through the dust after passing. In other words, light is transmitted through the filter paper that has passed through the dust before passing through and the filter paper that has passed through the dust after passing, and this light is received by the photocell, and the ratio of the current value becomes the dust removal performance of the filter. The color method is often used to measure the dust removal performance of medium performance filters. The secondary filter f2 is usually composed of a nonwoven fabric, glass wool, porous metal, or the like.

  The third-order filter used in the final stage is a high-performance filter called a HEPA filter, which was once used in equipment for clean rooms. Recently, it is also used in the final stage of home air purifiers. It has been. HEPA is an abbreviation for High Efficiency Particulate Air Filter, and the HEPA filter has a performance of a particle collection rate of 0.3 μm of 99.97% or more by a counting method. The counting method is also a kind of method for measuring the dust removal performance of a filter. The same amount of air is collected from the front and rear stages of the target filter, and the number of dust contained in the air is detected and counted. The ratio of the number of particles in the former stage and the latter stage is taken as the dust removal performance of the filter. The tertiary filter f3, which is a HEPA filter, is composed of a nonwoven fabric or glass wool. As the third-order filter f3, a higher-performance ULPA filter can be used instead of the HEPA filter. ULPA is an abbreviation for UltraLow Penetration Air Filter. The ULPA filter has a performance of capturing particles of 0.15 μm in a counting method at 99.9995% or more.

A dust removal device having a basic configuration equivalent to the dust removal device a introduced above, that is, a HEPA filter or ULPA filter is provided in the final stage, and a prefilter or a medium performance filter is provided in the previous stage to improve the performance of the HEPA filter or ULPA filter. A dust removing device whose basic configuration is to improve is disclosed in the following patent documents.
JP-A-7-96126 JP 2001-2119020 A Japanese Patent Laid-Open No. 2002-1023 JP 2006-46730 A

  The conventional dust removing device a has the above-described configuration and capability, but when this is used as a dust removing device in the removal work of substances with strict environmental standards such as asbestos, the final stage filter is: It must be capable of more than a HEPA filter. Further, in normal asbestos removal work, the standard of replacement of the primary filter f1 is about 2 to 4 times a day, and the standard of replacement of the secondary filter F2 is about once a day. The tertiary filter f3 (HEPA filter) ) Will be replaced once every 700 hours.

Here, it is as follows if the problem of the conventional dust removal apparatus a is pointed out.
That is, in the conventional dust removing device a, the three filters of the primary filter f1, the secondary filter f2, and the tertiary filter f3 are arranged close to each other in the same housing c. Problems like this will arise. First, since the three filters are arranged close to each other, the performance of each filter is not fully exhibited. That is, by providing a certain amount of space before and after one filter, the performance of the filter is fully exhibited. However, when three filters are arranged close to each other, a filter having a thickness of three sheets is actually used. Is no different from the presence of a single sheet, and the pressure loss increases. Therefore, in order to reduce the pressure loss as much as possible and to fully exhibit the performance of one filter, it is necessary to provide a space where airflow can sufficiently move before and after one filter. In addition, by providing a space in which the airflow can sufficiently move, the rate at which particles that cannot pass through the filter fall before the filter is increased, so that the particles adhering to the filter are reduced and the life of the filter is extended.

  Further, in the conventional dust removing device a, there are overwhelmingly many three filters of the primary filter f1, the secondary filter f2, and the tertiary filter f3 are provided upright as shown in FIG. However, in the case of such an installation method, the particles captured on the filter surface are unlikely to fall downward, so that the filter life is also shortened. In order to avoid this, it is necessary to install the filter itself at a horizontal or near-horizontal angle, and to provide a space under which the airflow can move to some extent. In this way, since the dust blocked by the filter falls downward, clogging of the filter is reduced. This effect is considered to be particularly remarkable in the portion of the primary filter f1 where the particle size of the trapped dust is large, but it is considered that this effect also occurs to some extent in the secondary filter f2 and the tertiary filter f3. However, if the three filters are stacked horizontally, the particles blocked by the upper filter will fall to the lower filter surface. To avoid this, make the three filters independent of each other. It will be necessary to install it.

  Furthermore, in the conventional dust remover a, when clogging occurs in the three filters f1, f2, and f3, there is no means for eliminating this. Therefore, dust is accumulated on the filters f1, f2, and f3. If a means for automatically eliminating clogging is provided, it is considered effective for extending the life of the filter.

  In addition, since the times used as a guide for replacement of the primary filter f1, the secondary filter f2, and the tertiary filter f3 are completely different as described above, the filter is stored every time one filter is replaced. The exposed part must be exposed. This is not a problem for ordinary home air cleaners, but it is a serious problem in situations where it is desirable to avoid exposure to dust as much as possible, such as asbestos removal. I cannot help it. That is, in the asbestos removal operation, the guideline for replacement of the primary filter is 2 to 4 times a day as described above. That is, the filter filled with the fine powder of asbestos is stored. It is exposed to air 2-4 times a day. Therefore, in a situation where the exposure depends on the life of the worker such as asbestos removal work, it is necessary to consider a filter replacement method that does not expose the portion where the filter is stored.

Therefore, the problems of the present invention are summarized as follows.
<Problem 1>
It is necessary to provide a space where the airflow can sufficiently move before and after one filter.
<Problem 2>
It is necessary to install the filter itself at a horizontal or near-horizontal angle and to provide a space under which the airflow can move to some extent.
<Problem 3>
Means are provided for automatically eliminating clogging of the filter.
<Problem 4>
Consider a filter replacement method that does not expose the area where the filter is stored.

The present invention has been made to solve the above-described problems, and provides the following solution.
<Solution 1>
A dust removing device with a filter that is disposed between a dust collecting tip and a suction device and removes dust collected by the dust collecting tip. The dust removing device has one or more filters, and each of the one or more filters. Constitutes a dust removal unit mounted on an independent housing, the tip for dust collection and the first dust removal unit are connected by the first connection means, each dust removal unit is connected by an intermediate connection means, and the last dust removal unit The dust removing device is characterized in that the suction device is connected by the last connecting means, and the connection can be released.
<Solution 2>
The dust removing apparatus according to Solution 1, wherein the filter attached to the last dust removing unit is a HEPA filter or a ULPA filter.
<Solution 3>
The first connecting means, the intermediate connecting means, and the last connecting means include a sealing means for hermetically sealing the pipe by expanding a sealing tube provided in the pipe, and the pipes to be connected A connection fixing means having a fixing tube for fixing the connection state by pressing the fitting portion from the surroundings by being wound around the fitting portion and being expanded. The dust removing apparatus according to means 1 or solution means 2.
<Solution 4>
4. The dust removal apparatus according to Solution 1, Solution 2 or Solution 3, wherein a filter of each dust removal unit is attached to a housing of each dust removal unit through a film body made of an elastic body.
<Solution 5>
The dust removal apparatus according to Solution 1 or Solution 2 or Solution 3 or Solution 4, wherein the filter of each dust removal unit is mounted at an angle of 10 ° to 30 ° with respect to a horizontal plane.
<Solution 6>
The solution means wherein the housing of each dust removal unit is made of a transparent material, and the pipes and connection means for connection of each dust removal unit are made of a transparent material except for a sealing tube and a fixing tube. 3 or the dust removal apparatus according to the solution 4 or the solution 5.
<Solution 7>
The solution 1 or solution 2 or the solution is characterized in that the distance between each dust removal unit is fixed by mounting and fixing the housing of each dust removal unit on a common base by means of fixing the dust removal unit. The dust removing apparatus according to the means 3, the solution means 4, the solution means 5, or the solution means 6.

  According to the solution 1 of the present invention, there is provided a dust removing device with a filter that is disposed between the dust collecting tip and the suction device and removes the dust sucked by the dust collecting tip. Each of the one or more filters is attached to an independent housing, and the dust collecting tip and the first dust removing unit are connected by the first connecting means, and each dust removing unit is connected to each other. Connected by an intermediate connecting means, the last dust removal unit and the suction device are connected by the last connecting means, and the connection can be released, so that the airflow can move sufficiently before and after one filter. A possible space can be provided, and as a result, clogging of the filter is less likely to occur and the life of the filter is extended. Also, when replacing the filter, the filter to be replaced can be replaced with the new filter and the entire housing by disconnecting and separating the entire filter housing from the entire dust removing device, so that the filter portion is exposed to the air. Replacement work can be done without any problems.

  According to the invention of Solution 2 of the present invention, since the filter attached to the last dust removal unit is a HEPA filter or a ULPA filter, in the case of the HEPA filter, 99.97% or more of 0.3 μm dust particles are contained. In the case of the ULPA filter, 0.15 μm or more of dust particles can be removed by 99.9995% or more. That is, it can be sufficiently used as a dust removing device in work requiring high dust removal performance such as asbestos removal work.

  According to Solution 3 of the present invention, the pipe is hermetically sealed by expanding the sealing tube provided in the pipe in the first connection means, the intermediate connection means, and the last connection means. Since the sealing means for stopping is provided, when exchanging the filter together with the housing, the pipe can be hermetically sealed by expanding the sealing tube. Therefore, it is possible to perform the exchange work without exposing the dust accumulated inside the housing to the outside. In addition, there is provided a connection fixing means having a fixing tube for fixing the connected state by pressing the fitting portion from the periphery by being wound around the fitting portion of the pipes to be connected and inflated. Therefore, the exchange operation is completed, and the connection state can be firmly fixed in a state where the pipes are fitted. Therefore, a situation in which the pipes are scraped during the operation of the dust removing device is prevented.

  According to the invention of Solution 4 of the present invention, the filter of each dust removal unit is attached to the housing of each dust removal unit through a film body made of an elastic body. As a result, part of the dust adhering to the filter is removed, so that the filter is prevented from being clogged and the life of the filter is extended.

  According to the solution 5 of the present invention, since the filters of each dust removal unit are mounted at an angle of 10 ° to 30 ° with respect to the horizontal plane, the dust does not easily adhere to the filter surface, and the filter eyes Clogging is prevented and the life of the filter is extended. If the installation angle of the filter is too close to the horizontal, when trying to provide a space where the airflow can move sufficiently above and below the filter, the housing itself is made large, or a connecting pipe is used. In particular, it is difficult to design the housing above the filter, such as having to project at an angle close to the vertical from the top surface of the housing. Conversely, if the installation angle of the filter is excessively inclined, the effect of preventing clogging of the filter is weakened. Therefore, the installation angle of the filter is set in the range of 10 ° to 30 °.

  According to invention 6 of the present invention, since the housing of each dust removal unit is made of a transparent material, the state inside the housing can be visually confirmed. That is, it is possible to visually check the accumulation state of dust inside the housing and the state of the filter. Furthermore, since the pipes and connection means for connecting each dust removal unit are made of a transparent material except for the sealing tube and the fixing tube, the state of the sealing tube and the fixing tube is visually checked. Can be confirmed. That is, whether the tube for sealing is sufficiently contracted to the extent that airflow does not hinder when contracted, or whether it is expanded to the extent that sealing is completely performed when expanded. Confirmation can be made visually. Also, in the case of a fixing tube, when removing the connection fixing means at the time of contraction, whether or not the tube is sufficiently contracted so as not to be caught on the pipe, and sufficiently fixed to ensure that the connection is fixed at the time of expansion. It can be visually confirmed whether or not it has expanded. Further, in both the sealing tube and the fixing tube, when the air is inflated and expanded, the progress of the expansion can be visually confirmed, so that the tube can be prevented from being damaged due to excessive expansion.

  According to the invention of Solution 7 of the present invention, the distance between each dust removal unit is fixed by mounting and fixing the housing of each dust removal unit on the common base by the dust removal unit fixing means. The distance between each dust removal unit does not fluctuate during the dust removal operation, and the connection between each dust removal unit does not become unstable. Further, when it is desired to move the position of the entire dust removing apparatus, it is very convenient because the common base may be moved. In addition, when it is desired to change the layout of each dust removal unit due to the space of the dust removal place, it is of course possible to use each dust removal unit mounted directly on the floor surface without using the pedestal. .

  The best mode for carrying out the present invention will be described below in detail with reference to the drawings.

<Configuration of Example 1>
As shown in FIG. 18, the dust removing device A of the first embodiment is disposed between the dust collecting tip H and the suction device V. The dust collecting tip H crushes the coating film of asbestos and various paints by the action of the small grinder G, and the crushed dust is conveyed to the dust removing device A by the air supply pipe Ps1 of the dust collecting tip H. . Further, the suction device V includes a compressor (not shown) and a fan (not shown), and is connected to the dust removing device A by an air feeding pipe Ps2 of the suction device V.

  As shown in FIGS. 1 to 3, the dust removing apparatus A according to the first embodiment is configured by four independent dust removing units 1 to 4 mounted on a common base 5. The dust removing unit 1 is airtightly connected to the air supply pipe Ps1 of the dust collecting tip H by the connecting means J1 and simultaneously connected to the dust removing unit 2 by the connecting means J2, and the dust removing unit 2 is connected to the dust removing unit 2. J2 is hermetically connected to the dust removal unit 1 by J2 and simultaneously connected to the dust removal unit 3 by connection means J3, and the dust removal unit 3 is hermetically connected to the dust removal unit 2 by connection means J3 and simultaneously connection means. The dust removal unit 4 is airtightly connected to the dust removal unit 4 by J4, and the dust removal unit 4 is airtightly connected to the dust removal unit 3 by the connection means J4. At the same time, the dust removal unit 4 is airtightly connected to the air supply pipe Ps2 of the suction device V by the connection means J5. It is connected.

The dust removal units 1 to 4 are made of a transparent material, and styrene resin, acrylic resin, polyamide resin, PET (polyethylene terephthalate), or the like can be used as the material. The pipes Ps1, Ps2 are also made of a transparent material, and as the material, styrene resin, acrylic resin, polyamide resin, PET (polyethylene terephthalate), or the like can be used. Furthermore, the pipes P11, P12, P21, P22, P31, P32, P41, and P42 for connecting the dust removal units 1 to 4 shown in FIGS. 2 and 3 are also made of a transparent material. Acrylic resins, polyamide resins, PET (polyethylene terephthalate), and the like can be used.

  As shown in FIGS. 1 to 3 and FIG. 14, the dust removal unit 1 includes a housing 11 and a filter F1 attached to the housing 11. The overall shape of the housing 11 is a cylindrical shape with an upper portion bent, and the housing 11 is composed of an upper portion 11a and a lower portion 11b. The upper portion 11a is configured integrally with the upper surface and the side surface, the lower end portion is configured as a flange 11c, the lower portion 11b is configured as an integrated bottom surface and the side surface, the upper end portion is configured as a flange 11d, and the filter F1 is interposed between the flange 11c and the flange 11d. The end of is pinched. The flange 11c, the flange 11d, and the end of the filter F1 are bonded or welded together. Accordingly, the upper portion 11a and the lower portion 11b constitute a housing 11 integrally with the filter F1 interposed therebetween, and the internal space of the housing 11 is in relation to the external space except that it is connected to the external space through receiving ports 11e and 11f described below. It is sealed.

  A cylindrical receiving port 11e is provided integrally with the upper portion 11a so as to protrude from the rear upper portion of the upper portion 11a of the housing 11. As shown in FIG. 14, the receiving port 11e is formed by bending a part of the upper portion 11a, and the connecting pipe P12 is fitted and fixed. The receiving port 11e and the pipe P12 are fixed so as not to be detachable by bonding or welding.

  A cylindrical receiving port 11f is provided at the front intermediate portion of the lower portion 11b of the housing 11 so as to project integrally with the lower portion 11b. As shown in FIG. 5, the receiving port 11f is formed by bending a part of the lower portion 11b, and the connecting pipe P11 is fitted and fixed. The receiving port 11f and the pipe P11 are fixed so as not to be detachable by adhesion or welding.

  The lower end portion of the lower portion 11b of the housing 11 is reduced in diameter to form a constricted portion 11g (see FIG. 3). The constricted part 11g is fitted into a recessed part 51a surrounded by a rim part 51b of the fixing means 51 of the base 5 described later.

  As shown in FIGS. 1 to 3 and 15, the dust removal unit 2 includes a housing 21 and a filter F <b> 2 attached to the housing 21. The overall shape of the housing 21 is a cylindrical shape with an upper portion bent, and the housing 21 is composed of an upper portion 21a and a lower portion 21b. The upper portion 21a is configured integrally with the upper surface and the side surface, the lower end portion is configured as a flange 21c, the lower portion 21b is configured as an integrated bottom surface and the side surface, the upper end portion is configured as a flange 21d, and the filter F2 is interposed between the flange 21c and the flange 21d. The end of is pinched. The flange 21c, the flange 21d and the end of the filter F2 are bonded or welded together. Accordingly, the upper part 21a and the lower part 21b integrally form the casing 21 with the filter F2 interposed therebetween, and the internal space of the casing 21 is in relation to the external space except that it is connected to the external space through the receiving ports 21e and 21f described below. It is sealed.

  A cylindrical receiving port 21e is provided on the rear upper surface of the upper portion 21a of the housing 21 so as to project integrally with the upper portion 21a. As shown in FIG. 15, the receiving port 21e is formed by bending a part of the upper portion 21a, and a connecting pipe P22 is fitted and fixed. The receiving port 21e and the pipe P22 are fixed so as not to be detachable by adhesion or welding.

  A cylindrical receiving port 21f is projected integrally with the lower portion 21b at the front intermediate portion of the lower portion 21b of the casing 21. The receiving port 21f is formed by bending a part of the lower portion 21b like the receiving port 11f (see FIG. 5) of the housing 11, and the connecting pipe P21 is fitted and fixed. The receiving port 21f and the pipe P21 are fixed so as not to be detachable by adhesion or welding.

  The lower end portion of the lower portion 21b of the housing 21 is reduced in diameter to form a constricted portion 21g (see FIGS. 2 and 3). The constricted portion 21g is fitted into a concave portion 52a surrounded by a rim portion 52b of the fixing means 52 of the base 5 described later. The constricted portion 21g is configured to be slightly longer than the constricted portion 11g of the lower portion 11b of the housing 11 (see FIG. 3).

  As shown in FIGS. 1 to 3 and 16, the dust removal unit 3 includes a housing 31 and a filter F <b> 3 attached to the housing 31. The overall shape of the housing 31 is a cylindrical shape with an upper portion bent, and the housing 31 is composed of an upper portion 31a and a lower portion 31b. The upper portion 31a is configured integrally with the upper surface and the side surface, the lower end portion is configured with the flange 31c, the lower portion 31b is configured with the bottom surface and the side surface integrated with each other, the upper end portion is configured with the flange 31d, and the filter F3 is interposed between the flange 31c and the flange 31d. The end of is pinched. The flange 31c, the flange 31d, and the end of the filter F3 are integrally bonded or welded together. Accordingly, the upper portion 31a and the lower portion 31b integrally form a housing 31 with the filter F3 interposed therebetween, and the internal space of the housing 31 is in relation to the external space except that it is connected to the external space through receiving ports 31e and 31f described below. It is sealed.

  A cylindrical receiving port 31e is provided on the upper rear surface of the upper portion 31a of the housing 31 so as to project integrally with the upper portion 31a. As shown in FIG. 16, the receiving port 31e is formed by bending a part of the upper portion 31a, and the connecting pipe P32 is fitted and fixed. The receiving port 31e and the pipe P32 are fixed so as not to be detachable by adhesion or welding.

  A cylindrical receiving port 31f protrudes integrally with the lower portion 31b at the front intermediate portion of the lower portion 31b of the casing 31. The receiving port 31f is formed by bending a part of the lower portion 31b in the same manner as the receiving port 11f (see FIG. 5) of the housing 11, and the connecting pipe P31 is fitted and fixed. The receiving port 31f and the pipe P31 are fixed so as not to be detachable by adhesion or welding.

  The lower end portion of the lower portion 31b of the housing 31 is reduced in diameter to form a constricted portion 31g (see FIGS. 2 and 3). The constricted portion 31g is fitted into a recessed portion 53a surrounded by a rim portion 53b of the fixing means 53 of the base 5 described later. The constricted portion 21g is slightly longer than the constricted portion 11g of the lower portion 11b of the housing 11 (see FIG. 3), and is configured similarly to the constricted portion 21g of the lower portion 21b of the housing 21.

  As shown in FIGS. 1 to 3 and 17, the dust removal unit 4 includes a housing 41 and a filter F4 attached to the housing 41. The overall shape of the casing 41 is a cylindrical shape with the upper part bent, and the casing 41 is composed of an upper part 41a and a lower part 41b. The upper portion 41a is configured integrally with the upper surface and the side surface, the lower end portion is configured as a flange 41c, the lower portion 41b is configured as an integrated bottom surface and the side surface, the upper end portion is configured as a flange 41d, and the filter F4 is interposed between the flange 41c and the flange 41d. The end of is pinched. The ends of the flange 41c, the flange 41d, and the filter F4 are bonded or welded together. Accordingly, the upper portion 41a and the lower portion 41b integrally form a housing 41 with the filter F4 interposed therebetween, and the internal space of the housing 41 is not connected to the external space through receiving ports 41e and 41f described below. It is sealed.

  A cylindrical receiving port 41e is provided on the upper rear surface of the upper portion 41a of the housing 41 so as to project integrally with the upper portion 41a. The receiving port 41e is formed by bending a part of the upper portion 41a as shown in FIG. 17, and the connecting pipe P42 is fitted and fixed. The receiving port 41e and the pipe P42 are fixed so as not to be detachable by adhesion or welding.

  A cylindrical receiving port 41f is projected integrally with the lower portion 41b at the front intermediate portion of the lower portion 41b of the casing 41. The receiving port 41f is formed by bending a part of the lower portion 41b like the receiving port 11f (see FIG. 5) of the housing 11, and the connecting pipe P41 is fitted and fixed. The receiving port 41f and the pipe P41 are fixed so as not to be detachable by adhesion or welding.

  The lower end portion of the lower portion 41b of the housing 41 is reduced in diameter to form a constricted portion 41g (see FIGS. 2 and 3). The constricted portion 41g is fitted into a recessed portion 54a surrounded by a rim portion 54b of the fixing means 54 of the base 5 described later. The constricted portion 41g is slightly longer than the constricted portion 11g of the lower portion 11b of the housing 11 (see FIG. 3), and is configured in the same manner as the constricted portion 21g of the lower portion 21b of the housing 21 and the constricted portion 31g of the lower portion 31b of the housing 31. Yes.

  Next, the structure of the connection means J1-J5 is demonstrated. The connecting means J1 is a structure for detachably connecting the connecting pipe P11 fitted and fixed to the air supply pipe Ps1 and the receiving port 11f of the housing 11 (FIGS. 1 to 3 and FIG. 5). (See FIG. 3 and FIG. 5). The air supply pipe Ps1 and the connection pipe P11 are connected to each other.

The connecting means J2 has a configuration for detachably connecting the connecting pipe P12 fitted and fixed to the receiving port 11e of the casing 11 and the connecting pipe P21 fixed and fitted to the receiving port 21f of the casing 21. 1 (see FIG. 1 to FIG. 3 and FIG. 10), and is composed of an end portion of the connecting pipe P12, an end portion of the connecting pipe P21, and connection fixing means X2 (see FIG. 3 and FIG. 10).

The connecting means J3 has a configuration for detachably connecting the connecting pipe P22 fitted and fixed to the receiving port 21e of the casing 21 and the connecting pipe P31 fixed and fitted to the receiving port 31f of the casing 31. 1 (see FIGS. 1 to 3 and FIG. 11), and is composed of an end portion of the connecting pipe P22, an end portion of the connecting pipe P31, and connection fixing means X3 (see FIGS. 3 and 11).

The connecting means J4 has a configuration for detachably connecting the connecting pipe P32 fitted and fixed to the receiving port 31e of the housing 31 and the connecting pipe P41 fitted and fixed to the receiving port 41f of the housing 41. 1 (see FIG. 1 to FIG. 3 and FIG. 12), and includes an end portion of the connecting pipe P32, an end portion of the connecting pipe P41, and connection fixing means X4 (see FIG. 3 and FIG. 12).

The connecting means J5 is a configuration for detachably connecting the connecting pipe P42 fitted and fixed to the receiving port 41e of the housing 41 and the air feeding pipe Ps2 (FIGS. 1 to 3 and FIG. 13). (Refer to FIG. 3 and FIG. 13). The connection fixing means X5 includes an end portion of the connection pipe P42, an end portion of the air supply pipe Ps2.

In the connecting means J1 to J5, there is a difference that the connecting means J1 and J5 are used to connect the pipes horizontally, and the connecting means J2 to J4 are used to connect the pipes vertically. However, since the detailed configuration is the same, the detailed configuration will be described below with the connecting means J1 as a representative.

As shown in FIG. 5, the connection means J1 is composed of an end portion of an air supply pipe Ps1, an end portion of a connection pipe P11, and a connection fixing means X1. Sealing means S11 is provided at the end of the air supply pipe Ps1, and sealing means S12 is provided at the end of the connection pipe P11. Since the stopping means S12 has the same configuration, only the sealing means S11 will be described as a representative.

The sealing means S11 includes a nipple N11 protruding from the upper end of the pipe Ps1, a tube T11 provided from the nipple N11 to the pipe Ps1, and a check valve B11. The nipple N11 is made of a transparent material, and the check valve B11 and the tube T11 are made of an opaque material. In particular, the tube T11 is provided with a high-saturation color so that it can be easily seen through the pipe Ps1 made of a transparent material.

The tube T11 has an upper air intake T11a fixed to the inside of the nipple N11 and a part of the end of the pipe Ps1 by adhesion, and a check valve B11 is mounted on the air intake T11a of the tube T11. In addition, in FIG. 5, the state which the air was extracted from tube T11 and contracted is represented, and the expanded state is displayed with the dashed-two dotted line. The diameter of the pipe Ps1 is slightly reduced at the end, but the diameter of the portion that comes into contact when the tube T11 is in an expanded state is slightly increased.

In the check valve B11, a valve body b1 having a cup shape in a side view is fixed to an upper end portion of a spring b3, and a lower part of the valve body b1 is inserted into a hole b21 of a ring-shaped seal rubber b2 that is horizontally fixed inside the nipple N11. It is penetrating. The lower end of the spring b3 is prevented from falling in a state where it is supported by a convex part b4 slightly projecting inside the nipple N11, and the lower part of the valve body b1 whose diameter is expanded downward is a hole b21 of the seal rubber b2. Since the spring b3 is biased upward, the lower part of the valve body B11 is strongly pressed by the hole b21 of the seal rubber b2, and the airtightness of the tube T11 is secured. . As described above, the configuration of the sealing unit S12 provided at the end of the pipe P11 is the same as the configuration of the sealing unit S11. Therefore, the detailed description of the configuration of the sealing unit S12 is omitted. T12 corresponds to the tube T11, the nipple N12 corresponds to the nipple N11, and the check valve B12 corresponds to the check valve B11.

The end portion of the pipe Ps1 and the end portion of the pipe P11 are fitted and connected by engaging the convex portion v1 provided at the end portion of the pipe Ps1 and the concave portion c1 provided at the end portion of the pipe P11. A connection fixing means X1 is provided in order to more securely fix this fitted state. The connection fixing means X1 is an annular body made of a transparent material in which a tube T13 surrounding the end portion of the pipe Ps1 and the fitting portion FX1 of the end portion of the pipe P11 is provided, and a nipple N13 is formed on the upper portion of the main body X11. An air inlet T13a of the tube T11 is fixed inside the nipple N13, and a check valve B13 is provided inside the air inlet T13a. Since the configuration of the check valve B13 is the same as the configuration of the check valve B11, the description is omitted, but the valve body b5 is the valve body b1, the seal rubber b6 is the seal rubber b2, and the hole b61 of the seal rubber b6 is the seal rubber b2. The spring b7 corresponds to the spring b3, and the convex part b8 corresponds to the convex part b4.

FIG. 5 shows a state where the tube T13 is filled with air and the tube T13 is expanded, and the tube T13 presses the fitting portion FX1 between the end of the pipe Ps1 and the end of the pipe P11, thereby causing the pipe Ps1 to expand. The fitting state between the end of the pipe and the end of the pipe P11 is securely fixed. Further, the connection fixing means X1 is positioned by slightly engaging the end X11a of the main body X11 with the convex portion v2 of the pipe Ps1 and the convex portion v3 of the pipe P11. Furthermore, since the tube T13 serves as a packing, the connection between the end of the pipe Ps1 and the end of the pipe P11 is airtightly fixed. The arrow d0 represents the direction of airflow.

Since the connecting means J1 to J5 have the same configuration as described above, the description regarding the connecting means J2 to J5 is omitted. Note that T21, T22, and T23 in FIG. 10, T31, T32, and T33 in FIG. 11, T41, T42, and T43 in FIG. 12, and T51, T52, and T53 in FIG. 13 are tubes.

As shown in FIG. 4, the pedestal 5 has an elliptical shape with a constricted planar shape, circular fixing means 51, 52, 53, 54 are provided on the top surface, and eight casters cs are provided on the bottom surface. Is provided. In addition, the constricted portion seen in a planar shape is provided so that an operator (not shown) can easily approach the dust removal units 1 to 5 when replacing the dust removal units 1 to 5 (see FIGS. 1 and 2). Is.

As shown in FIGS. 4 and 3, the fixing means 51 is surrounded by an annular rim portion 51b to form a recess 51a. The recess 51a has a housing of the dust removing unit 1 as shown in FIG. The constricted part 11g of the lower part 11b of 11 is fitted without a gap.

Since the fixing means 52 to 54 have the same configuration, the fixing means 52 will be described in detail as a representative, and the description of the fixing means 53 and 54 will be omitted. As shown in FIGS. 3 and 4, the fixing means 52 is surrounded by an annular rim portion 52b to form a recess 52a. The recess 52a has a housing of the dust removing unit 2 as shown in FIG. The lower part 21g of the lower part 21b of 21 is fitted without a gap.

Long holes 523, 526, and 529 are formed in the rim portion 52b at equal intervals. The long hole 523 has a support plate 521, the long hole 526 has a support plate 524, and the long hole 529 has a support plate. 527 are respectively provided in the radial direction of the rim portion 52b. Further, on the upper surface of the pedestal 5, a groove 522 is formed along the lower end of the support plate 521, a groove 525 is formed along the lower end of the support plate 524, and a groove 528 is formed along the lower end of the support plate 527, respectively. The support plate 521 is configured to be slidable in the radial direction of the rim portion 52b. The support plate 521 can slide in the groove 522, the support plate 524 in the groove 525, and the support plate 527 in the radial direction of the rim portion 52b. .

The support plates 521, 524, and 527 have the same shape, the height increases in the radial centrifugal direction of the rim portion 52b, and the convex portions 521a, 524a, and 527a are formed at the farthest end from the center of the rim portion 52b. Also, three springs s, s, s are arranged at equal intervals in the recess 52a, and as shown in FIG. 3, the bottom surface of the housing 21 of the dust removal unit 2 has three springs s, It is mounted on s and s, and is supported on the upper surface of the support plates 521, 524 and 527. At this time, the springs s, s, and s are in a slightly compressed state.

Next, the configuration of the filters F1 to F4 attached to each of the dust removal units 1 to 4 of the dust removal apparatus A of the first embodiment will be described. The filter F1 (see FIG. 14) attached to the dust removal unit 1 is a prefilter, which can be made of non-woven fabric, glass wool, porous metal, etc., and the collection rate is about 40 to 95% by weight method. Can be used. However, in consideration of extending the life of the filters F2 to F4 in the later stages, particularly the filter F4 in the final stage, it is desirable to use a filter F1 having a collection rate of about 70 to 95%. That is, the filter F4 used in the final stage is a HEPA filter and is expensive. Therefore, from the viewpoint of removing dust as much as possible in the previous stage, reducing the burden on the filter F4 and extending the life, The idea is to increase the dust removal efficiency by using a filter with a high collection rate at the stage of a certain filter F1. Therefore, it is desirable that most of the coarse particles of about 10 μm or more can be removed by the filter F1.

As shown in FIG. 14, the filter F1 is sandwiched and fixed between a flange 11c formed at the lower end of the upper portion 11a of the housing 11 of the dust removal unit 1 and a flange 11d formed at the upper end of the lower portion 11b. More specifically, a synthetic resin or metal ring-shaped frame F1b is bonded or welded around the main body F1a of the disk-shaped filter F1, and a ring-shaped elastic film F1c is attached to the frame F1b from above and below the frame F1b. Is adhered or welded so that the peripheral end portion of the elastic film F1c is sandwiched and fixed between the flange 11c and the flange 11d. Since the elastic film F1c is fixed to the flange 11c and the flange 11d by adhesion or welding, the elastic film F1c is integrated with the flange 11c and the flange 11d. Therefore, the main body F1a, the frame F1b, and the elastic film F1c are all integrated to form the filter F1, and the filter F1 is configured to be integrated with the housing 11. The filter F1 can be mounted at an angle of 10 ° to 30 ° with respect to the horizontal plane. However, in the dust removing apparatus A according to the first embodiment, the filter F1 is mounted at an angle of 20 ° with respect to the horizontal plane.

As the material of the frame F1b, aluminum or aluminum alloy can be used from the viewpoint of light weight as a metal, such as styrene resin, acrylic resin, polyamide resin, and PET (polyethylene terephthalate) as a synthetic resin. As the material of the elastic film F1c, butadiene rubber, styrene / butadiene rubber, nitrile rubber, ethylene / propylene rubber, urethane rubber, and the like can be used. Among them, urethane rubber has good elasticity for its hardness and is thermoplastic. It can be said that a material having a thickness is suitable as a material for the elastic film F1c because it can be welded.

The filter F2 (see FIG. 15) attached to the dust removal unit 2 is a medium performance filter and can be made of non-woven fabric, glass wool, porous metal or the like, and the collection rate is about 60 to 95% by a colorimetric method. Can be used. However, considering the extension of the lifetime of the filters F3 and F4 in the later stages, particularly the filter F4 in the final stage, it is desirable to use the filter F2 having a collection rate of about 80 to 95%. That is, the idea is that most of the particles having a particle diameter of about 1 to 10 μm are removed at the stage of the filter F2.

As shown in FIG. 15, the filter F2 is sandwiched and fixed between a flange 21c formed at the lower end of the upper portion 21a of the housing 21 of the dust removal unit 2 and a flange 21d formed at the upper end of the lower portion 21b. More specifically, a synthetic resin or metal ring-shaped frame F2b is bonded or welded around the main body F2a of the disk-shaped filter F2, and a ring-shaped elastic film F2c is attached to the frame F2b from above and below the frame F2b. Are adhered or welded so that the peripheral end portion of the elastic film F2c is sandwiched and fixed between the flange 21c and the flange 21d. Since the elastic film F2c is fixed to the flange 21c and the flange 21d by adhesion or welding, the elastic film F2c is integrated with the flange 21c and the flange 21d. Therefore, the main body F2a, the frame F2b, and the elastic film F2c are all integrated to form the filter F2, and the filter F2 is configured to be integrated with the housing 21. The filter F2 can be mounted at an angle of 10 ° to 30 ° with respect to the horizontal plane, but in the dust removing apparatus A of the first embodiment, the filter F2 is mounted at an angle of 20 ° with respect to the horizontal plane. The material of the frame F2b and the material of the elastic film F2c are the same as the material of the frame F1b and the material of the elastic film F1c of the filter F1.

The filter F3 (see FIG. 16) attached to the dust removal unit 3 is a semi-HEPA filter, that is, a filter having a performance equivalent to that of the HEPA filter, and can be made of non-woven fabric or glass wool. Those having a collection rate of about 99.5% can be used. As a result, most of the particles having a particle diameter of about 0.3 to 1 μm are removed, so that the burden on the subsequent filter F4 (HEPA filter) is very small. In dust removal of substances with strict environmental standards such as asbestos, it is considered that dust removal in a two-stage configuration of a quasi-HEPA filter and a HEPA filter is very effective.

As shown in FIG. 16, the filter F3 is sandwiched and fixed between a flange 31c formed at the lower end of the upper portion 31a of the housing 31 of the dust removal unit 3 and a flange 31d formed at the upper end of the lower portion 31b. More specifically, a synthetic resin or metal ring-shaped frame F3b is bonded or welded around the main body F3a of the disk-shaped filter F3, and a ring-shaped elastic film F3c is attached to the frame F3b from above and below the frame F3b. Is adhered or welded so that the peripheral end portion of the elastic film F3c is sandwiched and fixed between the flange 31c and the flange 31d. Since the elastic film F3c is fixed to the flange 31c and the flange 31d by adhesion or welding, the elastic film F3c is integrated with the flange 31c and the flange 31d. Therefore, the main body F3a, the frame F3b, and the elastic film F3c are all integrated to form the filter F3, and the filter F3 is also integrated with the housing 31. The filter F3 can be mounted at an angle of 10 ° to 30 ° with respect to the horizontal plane. In the dust removing apparatus A of the first embodiment, the filter F3 is mounted at an angle of 20 ° with respect to the horizontal plane. The material of the frame F3b and the material of the elastic film F3c are the same as the material of the frame F1b and the material of the elastic film F1c of the filter F1.

The filter F4 (see FIG. 17) attached to the dust removal unit 4 is a HEPA filter, which can be made of non-woven fabric or glass wool, and has a particle collection rate of 0.3 μm particles of 99.97% or more by the counting method. Can be used. As a result, particles having a particle diameter of about 0.3 μm are almost completely removed, so that the standard value for dust removal of substances with strict environmental standards such as asbestos can be satisfied. As the filter F4, a ULPA filter having a performance of a particle collection rate of 0.15 μm by a counting method of 99.9995% or more may be used.

As shown in FIG. 17, the filter F4 is sandwiched and fixed between a flange 41c formed at the lower end of the upper portion 41a of the housing 41 of the dust removal unit 4 and a flange 41d formed at the upper end of the lower portion 41b. More specifically, a synthetic resin or metal ring-shaped frame F4b is bonded or welded around the main body F4a of the disk-shaped filter F4, and a ring-shaped elastic film F4c is attached to the frame F4b from above and below the frame F4b. Is adhered or welded so that the peripheral end portion of the elastic film F4c is sandwiched and fixed between the flange 41c and the flange 41d. Since the elastic film F4c is fixed to the flange 41c and the flange 41d by adhesion or welding, the elastic film F4c is integrated with the flange 41c and the flange 41d. Accordingly, the main body F4a, the frame F4b, and the elastic film F4c are all integrated to form the filter F4, and the filter F4 is configured to be integrated with the housing 41. The filter F4 can be mounted at an angle of 10 ° to 30 ° with respect to the horizontal plane. In the dust removing apparatus A of the first embodiment, the filter F4 is mounted at an angle of 20 ° with respect to the horizontal plane. The material of the frame F4b and the material of the elastic film F4c are the same as the material of the frame F1b and the material of the elastic film F1c of the filter F1.

In the above, an example has been described in which the filter F1 is a pre-filter, the filter F2 is a medium performance filter, the filter F3 is a semi-HEPA filter, and the filter F4 is a HEPA filter or ULPA filter. Is a filter configuration in the case of about 100 μm or less. Therefore, when there are many dust particles of 100 μm or more, and when particles of 1 mm or more are also mixed, it is necessary to slightly change the filter configuration. As an example, filter F1 is a prefilter with a collection rate of about 20 to 50% by weight method, filter F2 is a prefilter with a collection rate of about 70 to 95% by weight method, and filter F3 is colorimetric. And a medium performance filter with a collection rate of about 80 to 95% by the method, and a filter F4 is a HEPA filter that can collect 99.97% or more of 0.3 μm particles by the counting method. Thus, the combination of the filters F1 to F4 can be freely selected according to the nature of the substance to be removed, the particle size distribution, and related laws and regulations, and of course, the number of filters can be increased or decreased. However, if the substance to be dust-removed is something like asbestos with strict environmental standards, a HEPA filter or a ULPA filter must be used as the filter F4.

<Operation of Example 1>
As shown in FIG. 18, the dust removing apparatus A according to the first embodiment is placed on the pedestal 5 in a state where the dust removing units 1 to 4 are connected in series, and the dust collecting unit 1 is used for supplying air to the tip end H for dust collection. The pipe Ps1 is connected, and the dust removal unit 4 is connected to the air supply pipe Ps2 of the suction device V. If the suction device V is operated in this state, the dust sucked from the dust collecting tip H having the small grinder G is sucked into the dust removing unit 1 through the air supply pipe Ps1 and removed by the filter F1. Further, the dust is removed by the dust removing unit 2 and removed by the filter F2, further sucked by the dust removing unit 3 and removed by the filter F3, and finally sucked by the dust removing unit 4 and removed by the filter F4. The dust-removed airflow is sucked into the suction device V.

  At this time, the pipe Ps1, the dust removal units 1 to 4 and the pipe Ps2 are connected so that the airflow smoothly flows. However, this connection is not caused by any airflow other than the pipe Ps1, the dust removal units 1 to 4 and the pipe Ps2. The connection means J1 to J5 are airtight so as not to leak. Since the connection means J1 to J5 have the same configuration and operation, the operation of the connection means J1 will be described with reference to FIG. As shown in FIG. 5, in a state where the convex portion v1 at the end of the pipe Ps1 and the concave portion c1 at the end of the pipe P11 are fitted, the connection fixing means X1 surrounds the fitting portion FX1, and the connection fixing means X1. Since the fitting portion FX1 is strongly pressed from the periphery with the tube T13 in the expanded state, the end portion of the pipe Ps1 and the end portion of the pipe P11 are connected and fixed at the fitting portion FX1. At this time, since the tube T13 also serves as a packing, the end of the pipe Ps1 and the end of the pipe P11 are hermetically connected. Also, since the tube T11 of the sealing means S11 at the end of the pipe Ps1 and the tube T12 of the sealing means S12 at the end of the pipe P11 are both in a contracted state, the airflow is free from the pipe Ps1 to the pipe P11. (Direction d0 in FIG. 5).

A pump device (not shown) such as a commercially available foot pump can be used as the means for expanding the tube T13 of the connection fixing means X1. That is, by connecting a hose (not shown) of a pump device (not shown) such as a foot pump to the nipple N13 and supplying air, the tube T13 is expanded, and the tube T13 is sufficiently fitted with the pipes Ps1 and P11. When the joint portion FX1 is pressed, the supply of air is stopped and the hose (not shown) is removed. The air in the tube T13 is not exhausted by the action of the check valve B13, and the tube T13 is fixed in the expanded state while pressing the fitting portion FX1.

The expanded state of the tube T13 can be visually confirmed because the pipe Ps1, the pipe P11, and the main body X11 of the connection fixing means X1 are made of a transparent material, and the tube T13 is colored with high saturation. Accordingly, it is possible to prevent a situation in which the tube T13 is insufficiently expanded and the fixed state becomes unstable, or conversely, the tube T13 is excessively expanded and damaged. In addition, although airflow exhausted from the suction device V (see FIG. 18) can be used for supplying air to the tube T13, since the volume of the tube T13 is small, it is not a mechanical means but an expanded state. A foot pump (not shown) that can supply air while checking the above is suitable. In addition, since the pipes Ps1 and P11 are made of a transparent material, and the tubes T11 and T12 are colored with high saturation, the contraction state of the tubes T11 and T12 can be visually confirmed, and the airflow flows through the pipes Ps1 and P11. It can be confirmed that there are no obstacles. Since the connecting means J2 to J5 perform the same operation, the air flow smoothly flows through the pipe Ps1, the dust removal units 1 to 4, and the pipe Ps2, and is connected in an airtight manner.

In the above state, the dust removal work using the dust removal apparatus A of the first embodiment is performed. As the work progresses, dust removed from the dust removal units 1 to 4 is accumulated in the dust removal units 1 to 4 by the dust removal action of the filters F1 to F4. Is done. The replacement of the filters F1 to F4 is determined according to the physical properties and particle size distribution of the dust, or related laws and regulations, so that the replacement is performed when the predetermined replacement time is reached. Since 11 to 41 are all made of a transparent material, it is necessary to check the accumulation state of the dust in the dust removal units 1 to 4 as needed, and if it is determined that the accumulation of dust is progressing enough to reduce the dust removal performance, replace it. It is possible to exchange even if the time has not been reached. In addition, since the state of the filters F1 to F4 can also be visually checked, it can be immediately replaced when any failure is recognized in any of the filters F1 to F4.

The filters F1 to F4 can be replaced for each filter, and the replacement is performed for each dust removal unit. For example, when it is necessary to replace the filter F1, first, the small grinder G at the tip end H for dust collection (see FIG. 18) is switched off, and then the suction device V (see FIG. 18) is operated. Stop. As a result, the airflow flowing through the dust removal units 1 to 4 and the pipe Ps2 of the suction device V from the pipe Ps1 of the tip end H for dust collection is stopped. Next, the end of the pipe Ps1 and the pipe P11 are supplied by supplying air to the tube T11 of the sealing means S11 of the connecting means J1 (see FIG. 5) and the tube T12 of the sealing means S12 to expand the tubes T11 and T12. The end of the tube is hermetically sealed, and the tube T21 and the tube T22 are expanded by supplying air to the tube T21 of the sealing unit S21 of the connecting unit J2 and the tube T22 (see FIG. 10) of the sealing unit S22. Thus, the end of the pipe P12 and the end of the pipe P21 are hermetically sealed. Thereby, the dust removal unit 1 is airtightly separated from the pipe Ps1 of the dust collection tip H and from the dust removal units 2 to 4 and is in an independent state.

Next, the connection fixing means X1 of the connection means J1 is released. That is, the pressed state of the tube T13 is released by removing air from the tube T13 of the connection fixing means X1 and contracting the tube T13 (see FIG. 6). In order to remove air from the tube T13, the valve body b5 is pushed down with a finger. As a result, the spring b7 is compressed, a gap is formed between the valve body b5 and the hole b61 of the seal rubber b6, the air in the tube T13 escapes from here, and the tube T13 contracts. As a result, the pressing state of the tube T13 is released and the connection fixing means X1 becomes movable, so that the fixing means X1 is moved from the fitting portion FX1 between the end of the pipe Ps1 and the end of the pipe P11 in the direction of the arrow d1 in FIG. Further, the pipe Ps1 is moved in the direction of the arrow d2 in FIG. 7 to release the fitting state between the end of the pipe Ps1 and the end of the pipe P11. Thus, when the end of the pipe Ps1 is detached from the end of the pipe P11, the state shown in FIG. 8 is obtained. Finally, the connection fixing means X1 is moved in the direction of the arrow d3 in FIG. 8 to remove the connection fixing means X1 from the end of the pipe Ps1.

When the connection fixing means X1 moves horizontally (FIGS. 6 to 8), the end X11a of the main body X11 of the connection fixing means X1 is slightly caught on the convex portion v2 of the end portion of the pipe Ps1 and the convex portion v3 of the pipe P11. However, since the main body X11, the pipe Ps1 and the pipe P11 of the connection fixing means X1 are made of synthetic resin and have a slight elasticity, when the end X11a exceeds the convex portions v2 and v3, the main body X11 is slightly increased. The pipe Ps1 and the pipe P11 are deformed, and the fixing means X1 can be moved horizontally.

In this way, when the end of the pipe Ps1 and the end of the pipe P11 are completely separated, the lid CP1 is attached to the end of the pipe Ps1 as shown in FIG. 9 (direction d4). The lid CP2 is attached to the end (direction d5). A sealing material CP1a made of an elastic body is adhered to the back surface of the lid CP1, and the sealing material CP1a is an end surface of the pipe Ps1 in a state where the convex portion v4 of the inner surface of the lid CP1 is fitted in the concave portion c2 of the pipe Ps1. Therefore, the pipe Ps1 is completely sealed from the outside air. Thereby, even if the tube T11 contracts due to natural contraction or damage, the dust inside the pipe Ps1 does not leak to the outside. In addition, a small amount of dust remaining between the tube T11 and the end face of the pipe Ps1 does not leak into the external space. The lid CP2 is symmetrical to the lid CP1. When the lid CP2 is attached to the end portion of the pipe P11, the sealing material CP2a is pressure-bonded to the end surface of the pipe P11, and the convex portion v5 on the inner side surface of the lid CP2 is formed on the pipe P11. The pipe P11 is completely cut from the outside air and is in an airtight state, and even if the tube T12 contracts due to natural contraction or damage, the dust inside the pipe P11 leaks to the outside. Disappears.

In the same process as described above, the connection fixing means X2 (see FIGS. 1 to 3 and 10) is also released, and the end of the pipe P21 is detached from the end of the pipe P12. Although not shown, a lid having the same configuration as the lid CP2 is attached to the end of the pipe P12 of the connecting means J2, and a lid having the same configuration as the lid CP1 is also attached to the end of the pipe P21. Thereby, blocking and sealing of the internal space of the dust removal unit 1 are completed.

Note that when releasing the connection fixing means X2, the end of the pipe P12 and the end of the pipe P21 are vertically fitted (see FIG. 10), so that the position of the dust removal unit 2 is relatively set. However, this operation is performed as follows (assuming that the separation of the pipe Ps1 and the dust removal unit 1 has already been completed). First, the tubes T21 and T22 are expanded to seal the end of the pipe P12 and the end of the pipe P21, and then the connection fixing means X2 is released. In this state, by lifting the entire dust removal unit 1 upward, the end of the pipe P12 and the end of the pipe P21 are disengaged, and the dust removal unit 1 is separated from the dust removal unit 2. As a result, the dust removal unit 1 is mechanically separated and independent from the pipe Ps1 and the dust removal units 2 to 4 of the dust collection front end H (see FIG. 18), so that the dust removal unit 1 is separated from the recess 51a (FIG. 3). (Refer to FIG. 1) and discard, and a new dust removal unit 1 is fitted into the recess 51a of the base 5.

Thereafter, the pipe P12 and the pipe P21 are fitted and connected by the connecting means J2, the tube T23 of the connection fixing means X2 is expanded to fix the connection state, and the tubes T21 and T22 are further contracted, so that the dust removing unit 2 The ventilation of the new dust removal unit 1 is ensured. Further, the pipe Ps1 and the pipe P11 are fitted and connected by the connecting means J1, the tube T13 of the connection fixing means X1 is expanded to fix the connection state, and the tubes T11 and T12 are contracted to further collect the tip end for dust collection. The ventilation of the pipe Ps1 of H (refer FIG. 18) and the new dust removal unit 1 is ensured. Thus, the replacement of the dust removal unit 1 is completed, so that the suction device V (see FIG. 18) is operated, the small grinder G of the dust collecting tip H is turned on, and the work can be resumed.

Thus, when replacing the dust removal unit 1, first, the end of the pipe Ps1 and the end of the pipe P11 are sealed, the connection fixing means X1 is released, and the pipe Ps1 and the pipe P11 are separated. Next, the end of the pipe P12 and the end of the pipe P21 are sealed, the connection fixing means X2 is released, and the pipe P12 and the pipe P21 are separated. At this time, if the dust removal unit 1 is lifted upward, the pipe P12 and the pipe P21 are naturally separated. However, if it is desired to replace the dust removal unit 2, the dust removal unit 3, or the dust removal unit 4, the dust removal unit 2 or the dust removal unit 3 or the position of the dust removal unit 4 needs to be lowered below that in use.

1-4, a method for lowering the position of the dust removal unit 2 or the dust removal unit 3 or the dust removal unit 4 from the time of use will be described, but the method is the same in the dust removal units 2 to 4, As a representative, a configuration for lowering the dust removal unit 2 from the time of use will be described.

As described in the section of the configuration, the dust removal unit 2 is placed on the support plates 521, 524, and 527 of the fixing means 52 of the base 5 and the springs s, s, and s in use. When it is necessary to lower the position of the dust removing unit 2 below that during use, the support plate 521 is slid along the groove 522 in the centrifugal direction, and the support plate 524 is slid along the groove 525 in the centrifugal direction. The support plate 527 is slid in the centrifugal direction along the groove 528. Since the support plates 521, 524, and 527 are configured to have a height that decreases in the centripetal direction, the bottom surface of the lower portion 21b of the casing 21 of the dust removal unit 2 is supported by the support plates 521, 524, and 527 and the springs s, s, and s. From the placed state, it is placed only on the springs s, s, s. Therefore, if the dust removal unit 2 is pushed down in a state where the support plates 521, 524, 527 are slid to the farthest part in the centrifugal direction, the springs s, s, s are compressed, and the position of the dust removal unit 2 is reduced. Is lower than in use. Since the dust removal unit 2 is mounted on the springs s, s, s, the lowering state of the dust removal unit 2 can be controlled by applying a force that pushes the dust removal unit 2 downward. The method of lowering the dust removal units 3 and 4 below the time of use is completely the same.

  The present invention discloses a dust removing device that can be used in various fields. In particular, the “asbestos removal tool” (Japanese Patent Application No. 2006-155825) filed by the applicant of the present application is combined as a tip for dust collection. In this case, a remarkable effect is exhibited in the asbestos removal work. That is, the asbestos removal tool is for sucking the asbestos dust which has been crushed at the same time as the asbestos surface is crushed by the action of a small grinder, and the air supply hose of the asbestos removal tool is connected to the dust collector of the present invention. In addition, by connecting a suction hose of a powerful suction device such as a compressor to the dust collector of the present invention, it is possible to perform an ideal asbestos removal operation that hardly causes scattering of asbestos dust into the working chamber. It will be. As a result, the cleaning work after the removal becomes extremely easy, the danger to the worker is drastically reduced, and the burden on the worker is greatly reduced. Further, when a HEPA filter is used as the filter of the final dust removal unit, 99% or 97% of the removed asbestos dust is accumulated in the plurality of dust removal units of the dust removal apparatus of the present invention. Since each dust removal unit can be easily replaced in a completely sealed state, there is no risk of asbestos dust leaking out during the replacement, and safe and comfortable removal work can be performed. As described above, the present invention is nothing but a disclosure of epoch-making technical contents in the asbestos removal work that is expected to become full-fledged nationwide.

It is a top view of the dust remover of Example 1 of the present invention. It is a left view of the dust removal apparatus of Example 1 of this invention. It is the sectional view on the AA line of FIG. It is a top view of the base of the dust removal apparatus of Example 1 of this invention. It is explanatory drawing explaining the cross-sectional structure of an example of the connection means of the dust removal apparatus of Example 1 of this invention. It is explanatory drawing explaining an effect | action of an example of the connection means of the dust removal apparatus of Example 1 of this invention. It is explanatory drawing explaining an effect | action of an example of the connection means of the dust removal apparatus of Example 1 of this invention. It is explanatory drawing explaining an effect | action of an example of the connection means of the dust removal apparatus of Example 1 of this invention. It is explanatory drawing explaining an effect | action of an example of the connection means of the dust removal apparatus of Example 1 of this invention. It is explanatory drawing explaining the cross-sectional structure of an example of the connection means of the dust removal apparatus of Example 1 of this invention. It is explanatory drawing explaining the cross-sectional structure of an example of the connection means of the dust removal apparatus of Example 1 of this invention. It is explanatory drawing explaining the cross-sectional structure of an example of the connection means of the dust removal apparatus of Example 1 of this invention. It is explanatory drawing explaining the cross-sectional structure of an example of the connection means of the dust removal apparatus of Example 1 of this invention. It is explanatory drawing explaining the cross-sectional structure of the filter of the first dust removal unit of the dust removal apparatus of Example 1 of this invention. It is explanatory drawing explaining the cross-sectional structure of the filter of the 2nd dust removal unit of the dust removal apparatus of Example 1 of this invention. It is explanatory drawing explaining the cross-sectional structure of the filter of the 3rd dust removal unit of the dust removal apparatus of Example 1 of this invention. It is explanatory drawing explaining the cross-sectional structure of the filter of the last dust removal unit of the dust removal apparatus of Example 1 of this invention. It is explanatory drawing explaining an effect | action of the dust removal apparatus of Example 1 of this invention. It is explanatory drawing explaining the structure of the conventional dust removal apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Dust removal unit 11 Housing 11a Upper part 11b Lower part 11c Flange 11d Flange 11e Receiving port 11f Receiving port 11g Constriction part 2 Dust removal unit 21 Housing 21a Upper part 21b Lower 21c Flange 21d Flange 21e Receiving part 31g Receiving part 31g Receiving part 21g Flange 31d Flange 31e Receptacle 31f Receptacle 31g Constriction part 4 Dust removal unit 41 Housing 41a Upper part 41b Lower part 41c Flange 41d Flange 41e Receptacle 41f Receptacle 41g Constriction part 5 Base 51 Fixing part 51a Recessed part 51b Rim part 52 Rim part 52 Rim part 52 Plate 521a Convex part 522 Groove 523 Long hole 524 Support plate 524a Convex part 525 Groove 526 Long hole 527 Support Holding plate 527a Convex part 528 Groove 529 Long hole 53 Fixing means 53a Concave part 53b Rim part 54 Fixing means 54a Concave part 54b Rim part A Dust removal device B11 Check valve B12 Check valve B13 Check valve CP1 Cover CP1a Seal CP2 Cover CP2 Material F1 Filter F1a Main Body F1b Frame F1c Elastic Film F2 Filter F2a Main Body F2b Frame F2c Elastic Film F3 Filter F3a Main Body F3b Frame F3c Elastic Film F4 Filter F4a Main Body F4b Frame F4c Elastic Line F4c Elastic Line Tip for dust J1 connection means J2 connection means J3 connection means J4 connection means J5 connection means N11 nipple N12 nipple N13 nipple P11 pipe P12 pipe P21 pipe P22 pipe P31 pipe P32 pipe P41 P42 Pipe Ps1 Pipe Ps2 Pipe S11 Sealing means S12 Sealing means S21 Sealing means S22 Sealing means T11 tube T11a Air intake T12 tube T13 tube T13a Air intake T21 tube T22 tube T23 tube T31 tube T31 tube T32 tube T32 tube Tube T42 Tube T43 Tube T51 Tube T52 Tube T53 Tube V Suction device X1 Connection fixing means X11 Main body X11a End X2 Connection fixing means X3 Connection fixing means X4 Connection fixing means X5 Connection fixing means a Dust removal device a1 Intake port a2 Exhaust port b1 Valve Body b2 Seal rubber b21 Hole b3 Spring b4 Projection b5 Valve body b6 Seal rubber b61 Hole b7 Spring b8 Projection c Housing c1 Concave c 2 concave part c3 concave part cs caster d0 direction d1 direction d2 direction d3 direction d4 direction d5 direction f1 primary filter f2 secondary filter f3 tertiary filter fn fan v1 convex part v2 convex part v3 convex part v4 convex part v5 convex part

Claims (7)

  A dust removing device with a filter that is disposed between a dust collecting tip and a suction device and removes dust collected by the dust collecting tip. The dust removing device has one or more filters, and each of the one or more filters. Constitutes a dust removal unit mounted on an independent housing, the tip for dust collection and the first dust removal unit are connected by the first connection means, each dust removal unit is connected by an intermediate connection means, and the last dust removal unit The dust removing device is characterized in that the suction device is connected by the last connecting means, and the connection can be released. The dust removing device according to claim 1, wherein the filter attached to the last dust removing unit is a HEPA filter or a ULPA filter.   The first connecting means, the intermediate connecting means, and the last connecting means include a sealing means for hermetically sealing the pipe by expanding a sealing tube provided in the pipe, and the pipes to be connected A connection fixing means having a fixing tube for fixing the connection state by pressing the fitting portion from the periphery by being wound around the fitting portion and expanding the fitting portion. Item 3. The dust removing device according to item 1 or 2.   4. The dust removing device according to claim 1, wherein the filter of each dust removing unit is attached to the housing of each dust removing unit through a film body made of an elastic body.   5. The dust removing apparatus according to claim 1, wherein the filter of each dust removing unit is mounted at an angle of 10 [deg.] To 30 [deg.] With respect to a horizontal plane.   The housing of each dust removal unit is made of a transparent material, and the pipe and connection means for connecting each dust removal unit are made of a transparent material except for a sealing tube and a fixing tube. The dust removing device according to claim 3 or claim 4 or claim 5. The distance between each dust removal unit is fixed by mounting and fixing the housing of each dust removal unit on a common base by means of fixing means of the dust removal unit. The dust removing device according to claim 3, claim 4, claim 5, or claim 6.

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