JP7693158B2 - Pull Hood for Pathogen Testing - Google Patents

Description

The present invention relates to a pull hood for pathogen testing used in various types of tests and examinations.

Conventionally, when testing samples containing substances that should not be dispersed into the outside space (hereafter referred to as contaminants), various operations are carried out on the samples in a box that is isolated from the outside space and can be locally ventilated.

For example, Patent Document 1 below proposes a clean cabinet with a double barrier for ventilation to prevent scattering of contaminants onto other samples during sample storage and work. Patent Document 2 below proposes an open safety cabinet or an exposure prevention box that is installed in a workroom equipped with a local exhaust ventilation system. These cabinets make it possible to prevent contaminants from being released to the outside when handling samples that may scatter contaminants.

The following Patent Document 3 proposes a clean system in which a storage chamber for housing a box-type incubator is provided within a clean bench, and the incubator can be moved into a work chamber using slide rails.

The following Patent Document 4 proposes a clean box that is small, can be moved while maintaining a clean environment, and is not restricted in terms of where it can be placed. Even in these devices, boxes are effectively used to isolate them from the outside space.

Japanese Patent Application Publication No. 1-288342 JP 2018-187107 A JP 2013-204910 A JP 2000-126619 A

However, in conventional boxes that are isolated from the outside space and can be vented locally, contaminants that fly around during various operations on the samples can adhere to the inside of the boxes, causing contamination. In particular, the bottom surface is easily contaminated by contaminants, as fine particles of contaminants that fly around in the atmosphere fall onto the bottom surface, or droplets containing contaminants fall onto the bottom surface.

Therefore, if the box was contaminated or there was a high possibility of contamination, it was necessary to frequently clean the inside of the box, especially the bottom, before testing the next sample. Furthermore, if the contaminant was a substance that was harmful to the workers, the cleaning process required excessive effort in order to highly eliminate the risk of secondary contamination caused by the workers coming into contact with the contaminant.

Therefore, the objective of the present invention is to provide a pull hood for pathogen testing that allows the next test to be performed easily and accurately without the labor of cleaning work.

To achieve the above object, the pathogen testing pull hood of the present invention is characterized by comprising a housing body isolated from the outside space and having a work chamber inside as a work space for an operator to perform work, an operation opening formed in a part of the housing body so that an operator can insert his/her hand into the work chamber to operate an object inside the work chamber from outside, an exhaust fan capable of purifying the gas in the work chamber and discharging it to the outside, a peephole formed of a transparent member and provided in at least a part of the housing body to enable the inside of the work chamber to be viewed from the outside, and a replaceable bottom plate provided separately from the housing body and capable of being disposed at the bottom of the work chamber and arranged so as to be movable in and out of the work chamber.

The pathogen testing pull hood of the present invention may have a slit on the front side of the housing body that allows the bottom plate to be inserted and removed from the outside to the inside of the housing body.

In the pathogen testing pull hood of the present invention, a portion of the bottom plate may be provided with at least one storage section capable of storing an object to be operated inside.

The storage section may also be formed by bending a portion of the bottom plate into a cylindrical shape.

According to the pathogen testing pull hood of the present invention, when testing a sample, an operator can insert his/her hand through the operation opening and operate the object to be tested within the working chamber of the housing main body isolated from the outside space while visually checking the operation through the observation window as needed. In this case, the exhaust fan can purify the gas within the working chamber and exhaust it to the outside, so that the inside of the working chamber can be maintained at negative pressure without releasing contaminants into the outside space. Therefore, even if contaminants are scattered from the object to be tested, they will not be released into the outside space.

The bottom plate is provided separately from the main body of the housing and is replaceable, and is positioned so that it can be inserted and removed from the bottom of the work chamber. Therefore, even if contaminants fall to the bottom of the work chamber when operating an object to be operated, or if droplets of contaminants scattered within the work chamber fall to the bottom of the work chamber, the bottom plate can be easily kept clean by removing it from the main body of the housing and replacing it with a new bottom plate.

As a result, the next test can be performed in a clean work chamber without the effort of cleaning the bottom or inside of the work chamber, and the sample for the next test will not be cross-contaminated by contaminants present in the work chamber, making it easy to perform high-precision testing.

It is therefore possible to provide a pull hood for pathogen testing that allows the next test to be performed accurately without the labor of cleaning work.

In the pathogen testing pull hood of the present invention, if a part of the bottom plate has at least one storage section capable of storing an object to be operated inside, the storage section in which the object to be operated is stored can be provided replaceable together with the bottom plate. Therefore, when the object to be operated is operated in the work chamber, the object to be operated can be stored in the storage section as necessary, and since this storage section can also be kept clean, the sample will not be secondarily contaminated even when the object to be operated is stored in the storage section.

In addition, in the pathogen testing pull hood of the present invention, if the storage section is formed by bending a portion of the bottom plate into a cylindrical shape, the flat bottom plate can be bent at any time necessary to form a three-dimensional storage section, which allows for compact storage and distribution, and when in use, the storage section can be formed with simple deformation, allowing for easy and frequent replacement, and is easy to use because the bottom of the work chamber and the storage section can be handled as a single unit when in use.

FIG. 1 is a perspective view of a pathogen testing pull hood according to an embodiment of the present invention. 1A and 1B are a front view and a side view of a pathogen inspection pull hood according to an embodiment of the present invention. 1A to 1C show paper materials for forming a housing body according to an embodiment of the present invention, and show the unfolded and separated states viewed from the rear side before assembling the housing body. FIG. 2 is a perspective view of a bottom plate according to an embodiment of the present invention. 1A to 1C are a plan view, a front view, and a side view of a bottom plate according to an embodiment of the present invention. 1 shows a paper material for forming a base plate according to an embodiment of the present invention, in an unfolded state prior to assembling the receptacle; 1 is a longitudinal cross-sectional view of a pathogen testing pull hood according to an embodiment of the present invention, taken in the front-rear direction.

Below, a pathogen testing pull hood according to an embodiment of the present invention will be described in detail with reference to the drawings.

The pathogen testing pull hood of this embodiment is a box that is provided with a work space that is isolated from the outside space and allows an operator to operate the object being manipulated when manually performing various processes on a sample.

The object of operation is not particularly limited, and may be an instrument or the like that is operated manually by an operator to perform various processes on a sample during testing. The processing of the sample is also not particularly limited, and may be, for example, various unit operations that an operator performs during testing, such as transporting, storing, holding, collecting, mixing, dissolving, separating, transporting, culturing, analyzing, etc. of the sample.

Such a pathogen testing pull hood is suitable for use in testing using samples or reagents containing contaminants that should not be dispersed into external space, to prevent the dispersion of the contaminants into external space. In this embodiment, an example of a testing box used by an operator to operate an object in a PCR (Polymerase Chain Reaction) test for testing the possibility of infection with the so-called new coronavirus, etc., is used for explanation. However, this testing box may also be used to prevent contaminants from scattering or leaking from the test object or test object into external space in a PCR test for testing the possibility of infection with a virus other than the so-called new coronavirus, or in any test or various tests or various tests other than the PCR test.

As shown in FIG. 1, the pathogen testing pull hood 10 of this embodiment includes a housing body 12 in which a work chamber 11 is provided as a work space for an operator to manually perform testing work and is isolated from the outside space, an exhaust fan 13 that can purify the gas in the work chamber 11 and exhaust it to the outside, and a bottom plate 14 that is provided separately from the housing body 12 and can be disposed at the bottom of the work chamber 11 and is arranged so that it can be inserted and removed from the work chamber 11.

The housing body 12 is formed from various materials that have the rigidity to maintain the shape required for safe inspections and tests during the period in which they are performed, and that can prevent gases dispersed or liquids leaking from inside the housing body 12 during inspections and tests from escaping to the outside. In this embodiment, the pathogen inspection pull hood 10 is disposable after one or several inspections or tests, so the housing body 12 is formed from low-cost plate-shaped cardboard, such as corrugated cardboard. However, the housing body 12 may be formed from any material, such as synthetic resin, natural resin, or wood, as long as it can achieve the above-mentioned objectives.

As shown in Figs. 1 to 3, the housing body 12 has a rectangular bottom surface 21, a pair of side surfaces 22 arranged parallel to each other on both side edges of the bottom surface 21, a front surface 23 arranged on the front side facing the operator and disposed between the pair of side surfaces 22, a back surface 26 arranged on the rear edge of the bottom surface 21 and disposed between the pair of side surfaces 22, and a top surface 27 arranged on the upper edges of the pair of side surfaces 22, the back surface 26, and the front surface 23.

The front portion 23 has a lower front portion 24 on the lower surface portion 21 side and an upper front portion 25 that is inclined in a planar shape from the upper end of the lower front portion 24 to the upper surface portion 27.

The upper front portion 25 is provided with a peep hole 25a that allows the worker to view the inside of the work chamber 11 from the outside. The peep hole 25a has a rectangular window opening 25b formed in the upper front portion 25, and a transparent member 25c that is made of a transparent film or the like and is attached to the periphery of the window opening 25b to close the window opening 25b. As shown in FIG. 3, the peripheral portion of the transparent member 25c and the peripheral portion on the back side of the window opening 25b form an attachment area 37, and are fixed by glue or the like.

The transparent member 25c in this embodiment may be made of any material other than a transparent film, such as a transparent glass plate or a transparent acrylic plate, as long as it shields the internal and external spaces and allows the outside to be seen from the inside. The periphery of the transparent member 25c and the periphery of the front side of the window opening 25b may form an attachment area 37, and may be fixed with glue or the like. Furthermore, the transparent member 25c may be formed so as to be detachable from the housing body 12, so that it can be removed from the housing body 12, washed, and then reattached to the housing body 12 for repeated use.

As shown in FIG. 1, a pair of operation openings 24a are formed on the left and right sides of the lower front portion 24, allowing an operator to insert his or her hands into the work chamber 11 to operate objects in the work chamber 11 from the outside. In this embodiment, the operation openings 24a are provided adjacent to the bottom surface portion 21, and the lower edge of each operation opening 24a is formed by the bottom surface portion 21.

Between the lower front portion 24 and the underside portion 21, a bottom plate slit 28 is formed, allowing the bottom plate 14 to be inserted and removed.

The bottom plate slit 28 has a left-right length equal to or greater than the left-right width of the bottom plate 14 (the left-right dimension shown in FIG. 2). In this embodiment, the front lower portion 24 and the bottom surface portion 21 are spaced apart from each other, so that the bottom plate slit 28 is formed across the entire width of the front lower portion 24 and the bottom surface portion 21.

The bottom plate slit 28 also has a vertical width (vertical dimension shown in FIG. 2) equal to or greater than the thickness of the bottom plate 14. In this embodiment, a clearance is provided such that the upper surface of the bottom plate 14 does not come into contact with the upper edge of the bottom plate slit 28 when the bottom plate 14 is removed. By giving the bottom plate slit 28 such a horizontal length and vertical width, it is possible to smoothly insert and remove the bottom plate 14 from inside the housing body 12 while preventing gas or leaked liquid from scattering or leaking outside the housing body 12.

As described above, in this embodiment, the housing body 12 is formed from a plate-shaped paper material such as cardboard.

In this embodiment, the housing body 12 is formed by folding and assembling multiple plate-shaped paper materials of different shapes into a three-dimensional shape, as shown in Figures 3(a) to 3(c).

In detail, a first plate material 31 having a lower surface portion 21, a pair of side surfaces 22, and a rear surface portion 26 connected flatly, a second plate material 32 having a top surface portion 27 and a front upper portion 25 connected flatly, and a third plate material 33 having a front lower portion 24 are used.

The first plate 31 has side sections 22 connected to both side edges of the back section 26 via creases 34a, and has a bottom section 21 connected to the bottom edge of the back section 26 via creases 34b. A bent piece 35a is provided along the entire length of the upper edge of each side section 22, and a bent piece 35b is provided along the entire length of the inclined edge of each side section 22, which is provided along the inner side when assembled.

In addition, an assembly slit 36a is provided at the middle of the upper edge of each side portion 22 to connect with the upper surface portion 27, an assembly slit 36b is provided at the middle of the inclined edge to connect with the upper front surface portion 25, and an assembly slit 36c is provided at the lower end side of each side portion 22 to connect with the lower surface portion 21.

The entire length of the left and right side edges of the underside portion 21 is provided with bent pieces 35c that are positioned on the inside when assembled, and bottom claw portions 21p are provided on the left and right sides via these bent pieces 35c, which are inserted from the inside into the assembly slits 36c of each side portion 22.

The second plate 32 has an upper surface 27 and a front upper portion 25 connected via a fold 34c.

The top surface portion 27 is provided with a through hole 27a for mounting the exhaust fan 13. In addition, a bent piece 35d is provided along the entire length of the rear edge of the top surface portion 27, which is positioned on the inside when assembled. Furthermore, the left and right side edges of the top surface portion 27 are provided with top surface claw portions 27p that are inserted from the outside into assembly slits 36a on the upper edges of the left and right side portions 22.

The upper front portion 25 has a rectangular window opening 25b that forms a viewing window 25a.

At the midpoint between the left and right side edges of the upper front portion 25, there is a front upper claw portion 25p that is inserted from the outside into the assembly slits 36b in the inclined edges of the left and right side portions 22.

The entire length of the lower edge of the upper front portion 25 is provided with a front bent piece 35e that is placed on the outside of the lower front portion 24 when assembled. At the position where the front bent piece 35e overlaps with the operation opening 24a, a notch 35f having a corresponding shape is provided.

Furthermore, two front lower claws 24p are provided at the vertical middle position and the lower end (upper end in the figure) of the front bent piece 35e, protruding in opposite directions to connect to the lower front part 24 from the outside. One front lower claw 24p is formed by providing an arc-shaped cut at the middle position of the front bent piece 35e. The other front lower claw 24p is formed at the lower end of the front bent piece 35e, protruding downward.

The third plate 33 has a lower front portion 24, and the entire length of the left and right side edges of the lower front portion 24 are provided with bent pieces 35g that are positioned on the inside when assembled. In addition, the entire length of the upper edge of the lower front portion 24 is provided with bent pieces 35h that are positioned on the inside when assembled.

To assemble the housing body 12 by folding the first to third plate members 31, 32, and 33, a transparent member 25c such as a transparent film is attached to the front upper portion 25 of the second plate member 32 shown in FIG. 3(b) in advance to cover the window opening 25b with the transparent member 25c. For example, as shown in FIG. 3(b), the attachment areas 37 provided on the entire periphery of the back side of the window opening 25b of the front upper portion 25 and the entire periphery of the front side of the transparent member 25c are attached to each other.

First, the bottom surface 21, the pair of side surfaces 22, and the back surface 26 of the first plate material 31 are bent at the creases 34a, 34b, respectively, and the bent pieces 35c on the side edges of the bottom surface 21 are bent. The pair of bent pieces 35c on the side edges are positioned inside the pair of side surfaces 22, and each bottom surface claw portion 21p is inserted from the inside into the assembly slits 36c on the lower end side of the side surfaces 22. This forms the first plate material 31 into a three-dimensional shape.

Furthermore, the left and right side edges and the upper edge of the lower front portion 24 of the third plate material 33 are bent to bend the bent pieces 35g and 35h.

The attachment areas 37 on the outer surfaces of the bent pieces 35g on both side edges of the front lower portion 24 and the inner surfaces near the front end portions of the pair of side portions 22 of the first plate material 31 are attached to each other. At this time, a bottom plate slit 28 is formed over the entire length between the front lower portion 24 and the bottom portion 21.

The second plate 32 is formed by bending the bent piece 35d at the rear edge of the top surface 27 of the second plate 32, bending the top surface 27 and the front upper part 25 at the crease 34c, and bending the front upper part 25 and the front bent piece 35e.

The attachment area 37 provided on the entire inner surface of the folded piece 35d at the rear edge of the top surface portion 27 is attached to the attachment area 37 provided on the upper edge side of the back surface portion 26.

The upper claws 27p on the left and right side edges of the top surface 27 are bent and inserted from the outside into the assembly slits 36a on the upper edges of each side surface 22.

An exhaust fan 13 is attached to this top surface 27.

The front upper claws 25p on the left and right side edges of the front upper part 25 are bent and inserted from the outside into the assembly slits 36b on the inclined edges of each side part 22.

The front bent piece 35e is then placed on the outside of the front lower part 24, and the front lower claws 24p, which protrude in opposite directions, are inserted from the outside into the assembly slits 36d provided above and below the front lower part 24.

This allows the housing body 12 to be assembled.

The exhaust fan 13 is attached to a through hole 27a in the upper surface portion 27. Although detailed illustration is omitted, it is equipped with a suction drive unit 13a arranged on the upper part of the upper surface portion 27, and a filter unit 13b arranged on the lower part of the upper surface portion 27 and detachably connected to the suction drive unit 13a.

When the suction drive unit 13a and the filter unit 13b are connected, the exhaust fan 13 is attached by clamping the periphery of the through hole 27a in the upper surface portion 27 between the suction drive unit 13a and the filter unit 13b.

The suction drive unit 13a includes an electric motor (not shown), a fan (not shown) attached to the electric motor (not shown), and a power source (not shown) such as a dry cell. The suction drive unit 13a drives the electric motor (not shown) with power supplied from the power source (not shown) to rotate the fan (not shown), forcing air to flow from one side (here, the inside side of the housing body 12) to the other side (the outside side of the housing body 12).

The filter section 13b is fitted with a filter (not shown) capable of capturing contaminants that may be contained in the gas within the working chamber 11, and the gas within the working chamber 11 can be purified and discharged to the outside by passing it through the filter section 13b and discharging it to the outside.

The bottom plate 14, like the housing body 12, is made of various materials that have the rigidity to maintain the shape required for safe inspections and tests during the period in which they are performed, and that can prevent gases or leaked liquids from escaping from inside the housing body 12 during inspections and tests. In this embodiment, the bottom plate 14 is made of the same material as the housing body 12, low-cost plate-shaped cardboard, such as corrugated cardboard, so that it is disposable after one or several inspections or tests. However, the bottom plate 14 may be made of any material, such as synthetic resin, natural resin, or wood, as long as it can achieve the above-mentioned purpose.

As shown in FIG. 4, the bottom plate 14 has a flat portion 41 arranged along the bottom surface 21 of the housing body 12, and a storage portion 42 that is integral with the flat portion 41 and is provided in a portion of the rear surface 26 side of the work chamber 11 of the housing body 12 and is capable of storing an object to be operated inside.

The bottom plate 14 is at least as large as the work area in the work chamber 11 where an operator operates an object to be operated, and in this embodiment, has a left-right width that is approximately equal to the left-right width dimension of the bottom surface 21 of the housing body 12, and has a front-to-rear length that is longer than the depth dimension of the bottom surface 21.

The flat portion 41 is provided over the entire area except for the storage portion 42 and its adjacent left and right positions, and is placed on the underside portion 21 of the housing body 12.

Two storage sections 42 are provided adjacent to each other on the left and right, and each has a rectangular cylindrical shape with a square cross section extending in the front-rear direction. Each storage section 42 has a bottom wall 43 that is integral with and continuous with the flat section 41, an upper wall 44 that faces the bottom wall 43, and a side wall 45 that stands between the bottom wall 43 and the upper wall 44. Adjacent storage sections 42 are separated by a common side wall 45. In addition, the ends in the front-rear direction (the upper direction in FIG. 5 corresponds to the front direction, and the lower direction corresponds to the rear direction) are open. However, when the bottom plate 14 is completely stored in the housing body 12, the opening on the front side of the storage section 42 abuts against the rear part 26 of the housing body 12, and the opening is closed by the rear part 26 (see FIG. 1).

When the bottom plate 14 is attached to the housing body 12, as shown in Fig. 1 and Fig. 2 (a) and (b), the flat portion 41 is disposed in a state of protruding from the housing body 12 to the front side. The protruding portion makes it easier for an operator (not shown) to grasp the bottom plate 14 when removing it from the housing body 12, as described later. Note that, instead of the above configuration, various modified examples may be used to make the bottom plate 14 easier to grasp, such as forming only a part of the part of the bottom plate 14 that is on the front side when attached to the housing body 12 into a protrusion that extends to the front side, or providing a hole or recess in a part of the housing body 12 to make it easier for an operator (not shown) to grasp the bottom plate 14.

The left-right positions of the two storage sections 42 are set to correspond to the left-right position of the operation opening 24a in the housing body 12, and the left-right width of the two storage sections 42 is set to be equal to or less than the left-right width at the bottom end of the operation opening 24a.

Therefore, when the bottom plate 14 is attached to the housing body 12, as shown in FIG. 2(a), the two storage sections 42 are positioned in the operation opening 24a of the housing body 12 when viewed from the front. This makes it easier to insert and remove the bottom plate 14, which has storage sections 42 larger than the vertical width of the bottom plate slit 28 of the housing body 12, into and from the work chamber 11 of the housing body 12.

The bottom plate 14 is made of a paper material such as cardboard.

In this embodiment, the bottom plate 14 is formed from a single sheet of cardboard as shown unfolded in Figure 6, and two three-dimensional storage sections 42 are formed by folding and assembling parts of the bottom plate 14.

In detail, as shown in FIG. 6, a notch 47 or a cut-out area 48 is provided on one corner of a rectangular piece of cardboard to provide a formation area for the two storage sections 42.

The formation area of the storage section 42 includes a bottom wall 43 that is continuous with the flat section 41 and is used for the two storage sections 42, side walls 45 that are provided on both the left and right sides of the bottom wall 43 via creases 49, two top walls 44 that are provided with each side wall 45 via the creases 49, partial side walls 45a that are provided with parts of each top wall 44 via the creases 49, and connecting pieces 51 of approximately triangular shape that are continuous with the remaining parts of each top wall 44 without any partitions and connect to the top walls 44 of the adjacent storage sections 42.

The two partial side walls 45a, which are provided via a portion of the two upper walls 44 and the fold lines 49, are formed facing in opposite directions, and when the two storage sections 42 are molded, the two partial side walls 45a are arranged adjacent to each other in the front-to-rear direction to form a common side wall 45 that separates the two storage sections 42.

The sum of the folds 49 in the two partial side walls 45a is approximately equal to the front-to-rear length of each storage section 42, and when the two storage sections 42 are molded, the ends of the adjacent sides protrude in the front-to-rear direction toward the lower end.

Therefore, when the two storage sections 42 are molded, the end of one partial side wall 45a can be engaged with the end of the other partial side wall 45a, and it is possible to form a continuous side wall 45 in which the partial side walls 45a are connected in the front-to-rear direction.

The roughly triangular connecting pieces 51 provided without partitions in the remaining portion of each upper wall 44 where the partial side walls 45a are not provided each have a hook portion 52 at the tip. The hook portions 52 of each connecting piece 51 can be engaged with connecting slits 53 formed in the upper walls 44 of adjacent housing sections 42 when the two housing sections 42 are molded, and can connect the upper walls 44 of adjacent housing sections 42 to each other.

To use such a pathogen testing pull hood 10, as shown in FIG. 7, the housing body 12 is assembled with the exhaust fan 13 attached in advance, and the bottom plate 14 is prepared with the storage section 42 assembled. The bottom plate 14 is inserted through the bottom plate slit 28 and the operation opening 24a of the housing body 12, and placed on the underside 21 of the housing body 12.

In addition, by keeping the exhaust fan 13 running, the air in the work chamber 11 is constantly exhausted, maintaining a negative pressure in the work chamber 11.

For example, when a specimen is collected in advance with a sampling tool or the like and stored in an appropriate solution, and then analyzed using an analytical tool such as a chromatograph to check for the presence or absence of a specific contaminant, the sample is first carried into the work chamber 11 through the operation opening 24a while sealed in a sealed container 61. The sampling tool 62 and analytical tool 63 are also carried into the work chamber 11 through the operation opening 24a.

Here, the sealed container 61, sampling tool 62, and analytical tool 63 are all objects that are operated by the operator.

In addition, at least a part of the analysis section 63a of the analysis instrument 63 is provided with an open section 64 that is always open. In the case of an analysis instrument 63 such as a chromatograph, the open section 64 is the part where the sample is supplied.

The operator inserts his/her hands into the work chamber 11 through the two operation openings 24a while wearing protective gloves or the like, and while viewing through the observation window 25a, opens the sealed container 61 and collects a sample using the sampling tool 62. The sample is supplied to the opening 64 of the analysis device 63, and analysis in the analysis section 63a begins.

During the analysis period, it is necessary to leave the analytical instrument 63 stationary in the work chamber 11, and at this time, the analytical instrument 63 is housed in the cylindrical storage section 42. The entire analytical instrument 63 may be housed in the storage section 42, but in this embodiment, since the analytical instrument 63 is longer than the storage section 42, the open section 64 of the analytical instrument 63 is housed in the cylindrical storage section 42 as shown by the imaginary line.

The exhaust fan 13 is also driven during the analysis period, and the air in the work chamber 11 is purified and exhausted, maintaining a negative pressure in the work chamber 11. Therefore, air from the outside space flows into the work chamber 11 through the operation opening 24a, passes through the work chamber 11, and is exhausted from the exhaust fan 13, creating an air current within the work chamber 11.

The open portion 64 of the analytical instrument 63 is always exposed to the atmosphere in the working chamber 11. If the analytical instrument 63 is left stationary in the working chamber 11 during the analysis period, the air current in the working chamber 11 will come into direct contact with the open portion 64, causing excessive evaporation of the components contained in the sample or the components of the mobile phase, or excessive dispersion of contaminants, resulting in fluctuations in the analytical conditions and testing environment and reduced analytical accuracy.

Therefore, by storing at least the open portion 64 of the analytical instrument 63 in the storage portion 42, the airflow in the working chamber 11 is prevented from directly contacting the open portion 64 of the analytical instrument 63, and the test can be performed stably and accurately. In this embodiment, when the bottom plate 14 is fully stored inside the housing body 12, the front opening of the storage portion 42 abuts against the rear portion 26 of the housing body 12 and is closed, so that the air flow in the storage portion 42 is suppressed and gaseous or fine particle-like contaminants are prevented from scattering into the housing body 12.

According to the pathogen testing pull hood 10 of this embodiment as described above, when an operator operates an object to test a sample in the work chamber 11 of the housing main body 12 isolated from the outside space while inserting his/her hand through the operation opening 24a and visually checking through the observation window 25a as needed, the exhaust fan 13 can purify the gas in the work chamber 11 and exhaust it to the outside, so that the inside of the work chamber 11 can be kept at negative pressure without releasing contaminants into the outside space. Therefore, even if contaminants are scattered from the object to be operated into the work chamber 11, they will not be released into the outside space.

The bottom plate 14 is provided separately from the housing body 12 and is arranged so that it can be moved in and out of the bottom of the work chamber 11. Therefore, even if contaminants fall to the bottom of the work chamber 11 when operating an object to be operated, or if droplets of contaminants scattered within the work chamber 11 fall to the bottom of the work chamber 11, the bottom plate 14 can be easily kept clean by removing it from the housing body 12, discarding it, and replacing it with a new bottom plate 14, and then placing the replaced bottom plate 14 inside the housing body 12.

Furthermore, because the housing body 12 is made of paper, even if droplets of contaminants scattered within the work chamber 11 adhere to the inner surface and contaminate it, the housing body 12 can be easily discarded and replaced with a new housing body 12, making it easy to keep the inner surface of the work chamber 11 clean.

As a result, the next test can be performed in a clean work chamber 11 without the effort of cleaning the bottom or inner surface of the work chamber 11, and the sample for the next test will not be secondarily contaminated by contaminants present in the work chamber 11, making it easy to perform high-precision testing.

In the pathogen testing pull hood 10 of this embodiment, at least one storage section 42 capable of storing an object to be operated inside is provided on a part of the bottom plate 14. This allows the storage section 42 in which the object to be operated is stored to be replaceable together with the bottom plate 14. Therefore, when the object to be operated is operated in the work chamber 11, the object to be operated can be stored in the storage section 42 as necessary, and since this storage chamber can also be kept clean, the sample will not be secondarily contaminated even when the object to be operated is stored in the storage section 42.

In the pathogen testing pull hood 10 of this embodiment, the bottom plate 14 is made of paper, which gives the bottom plate 14 the rigidity required for testing and the ability to prevent the scattering of contaminants, while making it possible to form the bottom plate 14 at low cost and making it easy to dispose of. Furthermore, by making the bottom plate 14 disposable, testing can be easily performed in a clean environment.

In the pathogen testing pull hood 10 of this embodiment, the storage section 42 is formed by bending a portion of the paper bottom plate 14 into a cylindrical shape. Therefore, the flat bottom plate 14 can be bent at any time necessary to form a three-dimensional storage section 42, which allows for compact storage and distribution, and when in use, the storage section 42 can be formed with simple deformation, facilitating frequent replacement and use. Moreover, when in use, the bottom of the work chamber 11 and the storage section 42 can be handled as a single unit, making it easy to use.

In addition, because the storage section 42 is formed by deforming a portion of the bottom plate 14, the bottom plate 14 and the storage section 42 can be made from the same material, making them easy to handle during manufacturing and disposal.

The above embodiment can be modified as appropriate within the scope of the present invention. For example, in the above, the housing body 12 has a three-dimensional shape in which a pair of side portions 22, a front portion 23, and a back portion 26 stand up from a rectangular bottom portion 21, and an inclined surface is provided on the front portion 23, but the shape of the housing body 12 is not limited in any way.

In the above embodiment, an example was described in which two operation openings 24a are provided side by side on the bottom plate 14, but this is not particularly limited, and the operation openings 24a may be provided at the left and right ends of the bottom plate 14, one at a time, spaced apart from each other, or the operation openings 24a may be provided anywhere other than the end of the bottom plate 14. Furthermore, there may be one operation opening 24a, or three or more operation openings 24a may be provided.

10 Pathogen inspection pull hood 11 Working chamber 12 Housing body 13 Exhaust fan 13a Suction drive unit 13b Filter unit 14 Bottom plate 21 Lower surface portion 21p Bottom claw portion 22 Side portion 23 Front portion 24 Front lower portion 24a Operation opening 24p Front lower claw portion 25 Front upper portion 25a Viewing window 25b Window opening 25c Transparent member 25p Front upper claw portion 26 Rear portion 27 Top portion 27a Through hole 27p Top claw portion 28 Bottom plate slit 31 First plate material 32 Second plate material 33 Third plate material 34a to 34c Folding lines 35a to 35d, 35g, 35h Folding piece 35e Front folding piece 35f Cutouts 36a to 36d Assembly slit 37 Attachment area 41 Flat portion 42 Storage section 43 Bottom wall 44 Top wall 45 Side wall 45a Partial side wall 47 Incision 48 Cut-out area 49 Fold crease 51 Connecting piece 52 Hook section 53 Connecting slit 61 Sealed container 62 Sampling tool 63 Analysis tool 63a Analysis section 64 Open section

Claims (4)

a housing body that is isolated from an external space and has a work chamber therein as a work space for an operator to perform work;
an operation opening formed in a part of the housing body, through which the operator inserts his/her hand into the working chamber to operate an operation target within the working chamber from the outside;
an exhaust fan capable of purifying the gas in the working chamber and discharging it to the outside;
a viewing window formed of a transparent member and provided in at least a part of the housing body, allowing the inside of the work chamber to be viewed from the outside;
a replaceable bottom plate that is provided separately from the housing body and can be disposed on the bottom of the working chamber and is arranged so as to be removable from the working chamber ;
A pull hood for pathogen testing, characterized in that a slit is provided on the front side of the housing body to allow the bottom plate to be inserted and removed from the outside of the housing body to the inside . a housing body that is isolated from an external space and has a work chamber therein as a work space for an operator to perform work;
an operation opening formed in a part of the housing body, through which the operator inserts his/her hand into the working chamber to operate an operation target within the working chamber from the outside;
an exhaust fan capable of purifying the gas in the working chamber and discharging it to the outside;
a viewing window formed of a transparent member and provided in at least a part of the housing body, allowing the inside of the work chamber to be viewed from the outside;
a replaceable bottom plate that is provided separately from the housing body and can be disposed on the bottom of the working chamber and is arranged so as to be removable from the working chamber;
A pull hood for pathogen testing, characterized in that a portion of the bottom plate has at least one storage section capable of storing the object to be operated therein. 2. The pull hood for pathogen testing according to claim 1 , wherein a part of the bottom plate is provided with at least one storage section capable of storing the object to be operated therein. 4. The pathogen inspection pull hood according to claim 2 , wherein the storage section is formed by bending a part of the bottom plate into a cylindrical shape.

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