JP2013195249A - Device for probing occurrence region of chemical substance by diffusion - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device that can probe occurrence states of a chemical substance at various locations by using an inexpensive and easily-operated device in a short time and with a certain level of accuracy.SOLUTION: A device is configured in which: a diffusion sampler 15 as a collection piece is supported in a cantilever manner by a support 21; a housing space for the sampler 15 is provided in a housing tool 29; a body 5 of an enclosed cover 3 is made of a magnetic substance; and the support 21 and the housing tool 29 are slidably attached on the inner side surface of the enclosed cover 3 by magnetic attraction from magnets 33 placed on the upper surface of the outer side of the enclosed cover 3. Accordingly, the diffusion sampler 15 can be exposed by moving the magnets 33 to move any one or both of the support 21 and the housing tool 29, and the collection can be started when an internal state of the cover becomes steady. This allows probing in a short time with a certain level of accuracy.

Description

  The present invention relates to a device that is convenient for searching for a site where chemical substances diffused into the air from ceilings, side walls, etc. of ordinary houses, furniture installed indoors, etc., and in particular, using a collection piece. The present invention relates to an apparatus for searching for a site where a chemical substance is generated.

Building materials and furniture that make up the ceilings and side walls of general houses contain carbonyl compounds such as formaldehyde and acetaldehyde that are harmful to the human body, and volatile organic compounds such as toluene and xylene. In recent high-tightness houses, these chemical substances float for a long time once they are released into the indoor air.
Therefore, it is a serious problem especially for people suffering from chemical hypersensitivity, and it is necessary to eliminate the source as much as possible.
On the other hand, there are restrictions on the use of building materials, but that is not enough. First, in order to grasp the actual effects, it is necessary to actually examine each part in the room at the same time. In addition, there are no special restrictions on furniture, etc., so these need to be examined individually.

Conventionally, a chemical substance is collected by sucking a wide range of air using a suction pump, and it is difficult to search for a site where the collected chemical substance is generated by this method.
In addition, as an official method, a method for identifying and measuring the concentration of chemical substances released from small pieces by placing small pieces of building materials that constitute side walls into a chamber and continuously sending air into the chamber is prescribed. However, in this method, the flow rate of the air sent into the chamber must be highly controlled by a pump, which not only increases the cost of the device but also increases the cost. It is not possible to excise and make small pieces for measurement.

Recently, a diffusion sampler that uses a phenomenon of gaseous chemical substances to be collected has been used so that chemical substances can be collected without using a suction pump.
For example, in Patent Document 1, an opening of a casing is abutted against a building material such as a side wall and closed, and the diffusion sampler described above is disposed inside the casing, and the building material portion facing the opening of the casing is used. A method for selectively collecting chemicals released into the air is disclosed.

JP 2002-122521 A JP 2008-170245 A

However, the collection device proposed for carrying out the method of the above-mentioned Patent Document 1 requires a certain height from the beginning because the diffusion sampler is suspended and supported vertically in the casing. If you try to increase the working efficiency by collecting up to a certain amount in a short time, the opening of the casing will be widened and the area where chemical substances are generated will be expanded, resulting in a larger casing and a more compact size. It is difficult to install in a confined place.
Moreover, since the height with respect to the area of an opening part becomes large relatively, a radiation space becomes large with respect to the generation area of a chemical substance, and the collection efficiency of a chemical substance worsens. In addition, a rod-shaped diffusion sampler is inserted into a narrow cylindrical part formed integrally with the casing and inserted into the casing, and the closed space is broken when the diffusion sampler is inserted. The steady state will certainly collapse, but the collection of chemical substances will start immediately from that point.

The inventor has previously proposed the device described in Patent Document 2 above. In this device, the diffusion sampler is supported parallel to the generation surface, so that the height can be reduced and compactness is achieved, but the diffusion sampler is already bare when it is attached to the closure cover. Therefore, as in the case of the above-mentioned Patent Document 1, the collection of chemical substances starts immediately before the steady state is reached.
The specific time varies depending on the type of chemical substance to be collected and the size of the closed cover, but it takes several minutes to several tens of minutes after creating the closed space to reach the steady state. If collection is started, the amount of radiation will be estimated to be low, so if you try to complete collection in a short time, there will be a problem in accuracy.

  The present invention is intended to solve the above-described problems, and is a novel and capable of investigating the occurrence of chemical substances in various places in a short time with a certain degree of accuracy using a simple and inexpensive apparatus. The purpose is to provide a useful device.

  In order to solve the above-mentioned problems, the invention of claim 1 is characterized in that a rod-shaped or plate-shaped collecting piece for collecting chemical substances diffused in the air, an inverted cup shape, and a lower end opening edge of the detection site. A closed cover that generates a three-dimensional closed space when abutted against a flat surface, a holding part that detachably supports the collection piece at one end thereof, and a base that is in contact with the inner surface of the closed cover A support device having a portion, a storage portion having a storage space for storing the collection piece, a storage device having a base portion that comes into contact with an inner surface of the closing cover, and a base portion of the support device and the storage device. Mounting means for mounting in a state of being in contact with the inner surface of the closure cover, and at least one of the base part of the support or the container and the closure cover part with which the base part comes into contact is made of a magnetic material. A support including the magnetic material, or The mounting means of the container is constituted by a mounting tool including a magnetic body that generates a magnetic attraction action between the closing cover and the support tool or the magnetic body of the container, and the magnetic attraction action from the mounting tool The support tool or the storage tool is slidably attached, and the collection piece is supported in an axial direction substantially parallel to the opening of the closing cover, and the collection piece is moved by the slide movement of the support tool or the storage tool. Is a device for searching for a site where a chemical substance is generated by emission, wherein the chemical substance is taken out from the housing space and exposed to the closed space.

  According to a second aspect of the present invention, there is provided a search device for a site where a chemical substance is generated due to diffusion described in the first aspect, wherein the magnetic body of the fixture is composed of a permanent magnet.

  According to a third aspect of the present invention, in the device for searching for a site where a chemical substance is generated by diffusion according to the first or second aspect, the support device and the container side both include a magnetic material and are configured to be slidable. Is a search device characterized by

  According to a fourth aspect of the present invention, there is provided the apparatus for searching for a site where a chemical substance is generated due to diffusion according to any one of the first to third aspects, wherein the support and the container are attached to the portable measuring instrument body and the measuring instrument body. It is a search device characterized by corresponding to a collection piece of a portable measuring instrument comprising a collection piece.

  The apparatus for searching for the site of occurrence of a chemical substance due to the emission of the present invention is simple to operate and can be provided at low cost, and the occurrence status of chemical substances in various places can be examined in a short time with a certain degree of accuracy. In addition, the structure is simple and the manufacturing cost per piece does not increase, and post-processing is easy.

1 is an overall perspective view of a search device for a site where a chemical substance is generated by diffusion according to a first embodiment of the present invention. It is a disassembled perspective view of the search device of FIG. It is operation | movement explanatory drawing of the sampler of FIG. It is a cross-sectional side view of the search device of FIG. It is a perspective view of the whole search apparatus of the generation | occurrence | production site | part of the chemical substance by the diffusion which concerns on the 2nd Embodiment of this invention. It is a disassembled perspective view of the search device of FIG. It is operation | movement explanatory drawing of the sensor plate of FIG. It is a cross-sectional side view of the search device of FIG. It is a typical perspective view of the whole portable measuring instrument which uses the sensor plate of FIG. 7 as a component.

The structure of the chemical substance searching device 1 by emission according to the first embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view when the search device 1 is used, FIG. 2 is an exploded perspective view thereof, FIG. 3 is a partial operation explanatory view thereof, and FIG. 4 is a sectional side view thereof.
Reference numeral 3 denotes an inverted cup-shaped closing cover, and its main body 5 is integrally formed into a thin and short rectangular shape. The ceiling 7 is substantially flat, and the outer edge portion is rounded. An annular edge that defines the lower end opening 9 of the main body 5 is substantially parallel to the ceiling 7. In terms of size, it is about 10 cm in length and width and about 4 cm in height. The closing cover 3 is assumed to be the same as that described in Patent Document 2.
The main body 5 is made of a magnetic stainless steel material. Stainless steel materials are used because chemical substances are relatively difficult to adsorb.
Reference numeral 11 denotes an annular polyethylene packing. In addition, since the polyethylene material which is a raw material has no chemical substance diffusion, it is employed, and other materials may be used as long as there is no chemical substance emission. The cross section of the packing 11 is substantially L-shaped, and the lower surface 13 is flat and flat. An annular edge of the lower end opening 9 of the main body 5 is detachably fitted in the inner peripheral recess of the packing 11 to form the closing cover 3.

Reference numeral 15 denotes a diffusion sampler as a collecting piece, which is abbreviated as a sampler. The sampler 15 is a cartridge type filter having a cylindrical (bar) shape. This sampler 15 is intended to mainly collect formaldehyde as a chemical substance. The exposed outer peripheral portion 17 is composed of a porous film, and dinitrophenylhydrazine-impregnated silica gel (granular) is contained inside. Packed. Further, both ends of the sampler 15 in the axial direction are sealed with caps 19.
In addition, the above-described cartridge type filter itself can be used as it is. Conventionally, in order to measure whether or not a chemical substance is diffused in a room, it has been used such that it is left in a suitable place in a room for a certain period of time.

  Reference numeral 21 denotes a support, and a base portion 23 of the support 21 has a small-sized flat disk shape, and an arm 25 is integrally formed on one surface thereof. The base portion 23 and the arm 25 are made of a ferrous material provided with a chrome-plated magnetism. Reference numeral 27 denotes an elastic Teflon (registered trademark) stopper. The arm 25 described above holds the outer periphery of the stopper 27 while holding it in a horizontal state. The arm 25 and the stopper 27 constitute a holding part. All of the above-described constituent materials are used because chemical substances are relatively difficult to adsorb.

  Reference numeral 29 denotes an accommodation tool, and the accommodation tool 29 is also provided with a base portion 23 and an arm 25 similar to the support tool 21 described above. Reference numeral 31 denotes a stainless steel cylindrical body, which is open at one end side in the axial direction and closed at the other end side. The above-described arm 25 holds the outer periphery of the cylindrical body 31 in a side-holding state and supports it by hanging. The arm 25 and the cylindrical body 31 constitute an accommodating portion. All of the above-described constituent materials are used because chemical substances are relatively difficult to adsorb.

  One end of the sampler 15 is cantilevered by being detachably inserted into the recess of the stopper 27 of the support 21 described above. The inside of the tubular body 31 of the container 29 is a housing space for the sampler 15, and as shown in FIG. 3, when the opening end of the tubular body 31 and the opening end of the stopper 27 come into contact with each other, the sampler 15 It is inserted and accommodated in the accommodation space of the cylindrical body 31. Since the opening end of the plug 27 is in elastic contact with the opening end of the cylindrical body 31, the sampler 15 accommodated therein is completely shielded from the outside. When the sampler 15 is pulled out, it is exposed to the ambient atmosphere.

  Reference numeral 33 denotes a disk-shaped magnet as a fixture, and the magnet 33 is a permanent magnet. The magnetism of the permanent magnet generates a magnetic attraction action between the magnetic stainless steel material constituting the main body 5 of the closing cover 3 and the material constituting the base portion 23 of the support tool 21 and the storage tool 29. Any type of material is acceptable.

When the base portion 23 of the support tool 21 is brought into contact with the ceiling surface of the closing cover 3 from the inside of the cover and the magnet 33 is brought into contact with the ceiling portion from the outside of the cover so as to be opposed thereto, the base of the support tool 21 is brought about by magnetic attraction. The part 23 is attached to the closing cover 3. When the magnet 33 is slid on the outer surface of the closing cover 3, the base portion 23 of the support 21 is also slid on the inner surface.
The same applies to the container 29 side.
Therefore, the sampler 15 can be changed from the shielded state to the exposed state by sliding the outer magnet 33.

Next, a generation site search method using the search device 1 will be described.
First, with the support tool 21 supporting one end of the sampler 15, the support tool 21 and the receiving tool 29 are brought into contact with each other to shield the sampler 15 from the outside, and then each base portion 23 is closed. It is attached to the inner surface of the ceiling 7 of the cover 3 using a magnet 33. At this time, the axial direction of the sampler 15 is substantially parallel to the lower end opening 9 of the closing cover 3. Since the sampler 15 is on the diagonal line of the substantially rectangular ceiling 7 of the closing cover 3, a sufficient moving distance is ensured so that the support tool 21 and the storage tool 29 are separated and the collecting part of the sampler 15 is exposed. Yes. Since the sampler 15 only needs to be exposed by exposing only the collection part, it is not necessary to pull out all of the sampler 15.
After that, it is installed so that the lower surface 13 of the packing 11 of the closing cover 3 comes into contact with a plane that is suspected to be the site where the chemical substance to be searched, in this embodiment formaldehyde (A) is generated (that is, the plane of the detection site) To do. As a result, a three-dimensional closed space is generated inside the closed cover 3. At this time, the axial direction of the sampler 15 is substantially parallel to the plane of the detection site.
Next, it is assumed that a steady state has been reached after the elapse of a preset time, and as shown in FIG. 4, either one of the magnets 33 or both of the magnets 33 is moved to release the support tool 21 and the storage tool 29. The sampler 15 is opened in the entire circumferential direction and exposed to a closed space.

  As described above, the search device 1 can cause the sampler 15 to perform collection after a steady state is reliably obtained by a simple operation from the outside. Moreover, the structure is simple and can be provided at low cost.

When the collection work is finished, after removing the sampler 15 from the support 21, dinitrophenylhydrazine-impregnated silica gel (granular) is taken out from the sampler 15 by a conventional method, and formaldehyde (A) is extracted with a solvent. The amount of (A) is measured, and the site where the amount is large is estimated as the occurrence site. With the above operation, the generation site search operation is completed.
On the other hand, the main body 5 and the support 21 of the closing cover 3 are individually cleaned and heated to remove the adsorbed chemical substances and prepare for the next collection operation. The main body 5 of the closing cover 3 has a simple box shape, no irregularities, the support 21 has a relatively simple structure, and any size is small. Therefore, cleaning and heat treatment are easy.

The structure of the chemical substance search device 41 by emission according to the second embodiment of the present invention will be described with reference to the drawings.
5 is a perspective view when the search device 41 is used, FIG. 6 is an exploded perspective view thereof, FIG. 7 is a partial operation explanatory view thereof, and FIG. 8 is a sectional side view thereof.
Similarly to the search device 1 according to the first embodiment, the search device 41 is also provided with a closing cover 3.
The code | symbol 43 shows the sensor plate as a collection piece. The sensor plate 43 is provided with a contrasting portion 45 and a suction portion 47 on a plate-shaped main body. The adsorbing portion 47 is coated with a lutidine derivative and is colored in contact with formaldehyde, so that the amount of chemical substance diffused can be determined from the change in absorbance. The sensor plate 43 is wrapped with a sensor filter 44 in order to suppress the amount collected.

Reference numeral 49 denotes a support, and a base portion 51 of the support 49 has a small-sized flat disk shape, and a box-shaped holding portion 53 is integrally formed on one surface thereof. The base portion 51 is made of an iron material provided with chrome-plated magnetism, and the holding portion 53 is made of PTFE resin.
Reference numeral 55 denotes a container, and the container 55 is also provided with a base portion 51 similar to the support tool 49 described above. Reference numeral 57 denotes a case made of PTFE resin, which is open on one end side.
All of the above-described constituent materials are used because chemical substances are relatively difficult to adsorb.

  One end of the sensor plate 43 is cantilevered by being inserted into the holding portion 53 of the support 49 described above. The inside of the case 57 of the container 55 is an accommodation space for the sensor plate 43. As shown in FIG. 7, when the opening end of the case 57 of the container 55 and the opening end of the holding portion 53 abut, The plate 43 is inserted and accommodated in the accommodation space of the case 57. A step 54 is provided at the opening end of the holding portion 53, and the tip end side of the step 54 is configured to slide into the case 57, so that the opening end of the case 57 of the container 55 is When the opening end of the holding portion 53 comes into contact, there is almost no gap, and the accommodated sensor plate 43 is completely shielded from the outside.

  The support tool 49 and the storage tool 55 described above are attached using the magnet 33 in the same manner as the search device 1 according to the first embodiment, and the sensor plate is moved by sliding the magnet 33 on the outside. 43 can be changed from a shielded state to an exposed state.

  The generation site search method using the search device 41 is the same as the search device 1 according to the first embodiment, and is assumed to be in a steady state after a preset time and is shown in FIG. As described above, either one or both of the magnets 33 are moved to release the support tool 49 and the storage tool 55 and open the sensor plate 43 to expose the closed space.

This search device 41 can enjoy the same effects as the search device 1 according to the first embodiment.
Recently, as shown in FIG. 9, a portable measuring instrument 61 is commercially available for investigation of formaldehyde, and this type of apparatus 61 includes a measuring instrument main body 63 and a sensor 65 attached thereto. The sensor 65 is normally detachable, and the sensor 65 can be operated while being attached to the sensor 65 or can be removed and placed at an arbitrary place to operate the sensor 65.
By using the sensor 65 as it is as the sensor plate 43 of the search device 41, it is possible to immediately know the state of chemical substance emission on site.
For example, as a commercially available measuring instrument, there is a formaldehyde multi-monitor (trade name) manufactured by Shinei Technology Co., Ltd.
The diffusion sampler needs to be analyzed on an analytical instrument, and it currently takes at least two days from the transport to the laboratory where the instrument is installed, through pre-processing / analytical processing. If the measuring instrument used is used, the result is obtained in about 1 to 2 hours, which is very efficient.

The embodiment of the present invention has been described in detail above. However, the specific configuration is not limited to this embodiment, and the present invention can be changed even if there is a design change without departing from the gist of the present invention. included.
For example, the type of sampler is selected according to the chemical substance to be collected, and various types such as an activated carbon cartridge can be used in addition to the dinitrophenylhydrazine-impregnated silica gel (granular) cartridge.
Moreover, you may make it the structure which can move only one of a support tool or an accommodation tool.

In order to search for the occurrence site of the chemical substance, it is necessary to install a device for each site that seems to be a generation site, and in consideration of work efficiency, many devices are installed at a time. Accordingly, it is required that the number of components of the apparatus is minimized to reduce the cost per unit and that it can be used repeatedly.
The search device of the present invention is capable of answering the above request.
In addition, the search device of the present invention is small in size and light in weight, easy to carry, and easy to install and remove on site.

1. Chemical substance search device by emission (first embodiment)
3 ... Closed cover 5 ... Main body 7 ... Ceiling 9 ... Opening 11 ... Packing 13 ... Lower surface 15 ... Diffusion sampler 17 ... Outer peripheral part 19 ... Cap 21 ... Support 23 ... Base part 25 ... arm 27 ... stopper 29 ... container 31 ... cylindrical body 33 ... magnet 41 ... chemical substance search device by emission (second embodiment)
43 ... Sensor plate 44 ... Sensor filter 45 ... Control part 47 ... Adsorption part 49 ... Supporting tool 51 ... Base part 53 ... Holding part 54 ... Step difference 55 (holding part) 55 ... Holding tool 57 ······································································································································································· Sensor A

Claims (4)

A rod-shaped or plate-shaped collection piece that collects chemical substances diffused in the air, and an inverted cup shape that forms a three-dimensional enclosed space when the lower end opening edge comes in contact with the plane of the detection site A closing cover, a holding part that detachably supports the collecting piece at one end side thereof, a support having a base part that comes into contact with the inner surface of the closing cover, and a container that contains the collecting piece A storage device having a space, a storage device having a base portion that comes into contact with the inner surface of the closure cover, and an attachment for mounting the support device and the base portion of the storage device in contact with the inner surface of the closure cover Means and
At least one base part of the support tool or the storage tool and a closing cover portion with which the base part comes into contact are made of a magnetic material, and the mounting means of the support device or the storage tool including the magnetic material is the closure cover and the support. It consists of a fixture including a magnetic body that generates a magnetic attraction action between the tool and the magnetic body of the container,
The support or container is slidably attached by a magnetic attraction action from the attachment, and the collection piece is supported substantially parallel to the opening of the closure cover, and the support or An apparatus for searching for a site where a chemical substance is generated by diffusion, wherein the collection piece is taken out of the accommodation space and exposed in the closed space by sliding movement of the accommodation tool.   2. The search device for a site where chemical substances are generated by diffusion according to claim 1, wherein the magnetic body of the fixture is composed of a permanent magnet.   3. The search device for a site where chemical substances are generated by diffusion according to claim 1 or 2, wherein both the support and the container side include a magnetic material and are configured to be slidable.   The apparatus for searching for a site where a chemical substance is generated by diffusion according to any one of claims 1 to 3, wherein the support tool and the storage tool are a portable measuring instrument body and a collecting piece attached to the measuring instrument body. A search device that corresponds to a collection piece of a portable measuring instrument.

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