Pulled food for pathogen inspection

Abstract

To provide a pull hood for inspection of pathogens which enables a next inspection to be easily performed with high accuracy without needing work such as cleaning work.SOLUTION: A pull hood for inspection of pathogens includes: a housing body 12 having an operation room 11 therein; an operation opening 24a for allowing an operator to insert its hand into the operation room 11 to operate an operation object in the operation room 11 from the outside; an exhaust fan 13 which may purify a gas in the operation room 11 and exhaust the gas to the outside; an inspection window 25a formed by a transparent member 25c; and a bottom plate 14 which is provided separately from the housing body 12, may be disposed on a bottom of the operation room 11, and is disposed in a manner that the bottom plate 14 can be carried into / out from the operation room 11.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a pull hood for pathogen testing used in various inspections, tests, and the like.

Background Art

[0002] Conventionally, when inspecting a sample containing a substance that is not desired to be scattered into the external space (hereinafter referred to as a contaminant), various operations are performed on the sample in a box that is isolated from the external space and can be locally exhausted.

[0003] For example, in Patent Document 1 below, a clean cabinet is proposed that is provided with a double barrier for ventilation so as not to scatter to other samples during sample storage and work. In Patent Document 2 below, an exposure prevention box and the like that are installed and used in an open-type safety cabinet or a working room of a local exhaust device are proposed. With these cabinets, it is possible to prevent contaminants from being released to the outside when handling a sample that may scatter contaminants.

[0004] In Patent Document 3 below, a clean system is proposed in which a storage room for accommodating a box-type incubator is provided in a clean bench, and the incubator can be moved into the working room by a slide rail.

[0005] In Patent Document 4 below, a clean box that can be moved while maintaining a small and clean environment and is not restricted by the placement location is proposed. Also in these devices, a box for isolating from the external space is effectively utilized.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Patent Document 2

Patent Document 3

[0007] However, in a conventional box that is isolated from the external space and can be locally exhausted, when various operations are performed on the sample, the scattered contaminants may adhere to the inner surface and cause contamination. In particular, the bottom surface was easily contaminated by the contaminants when fine particles of the contaminants scattered in the atmosphere fell or droplets containing the contaminants fell.

[0008] Therefore, when contaminated or when there is a high possibility of contamination, before the next sample inspection, frequent cleaning work of the inner surface of the box, particularly the bottom surface, was necessary. Moreover, when the contaminants are harmful substances to the operator, in order to highly eliminate the risk of secondary contamination where the operator comes into contact with the contaminants during the cleaning work, the cleaning work requires excessive labor.

[0009] Therefore, an object of the present invention is to provide a pathogen inspection fume hood that can easily and accurately perform the next inspection without requiring labor such as cleaning work. [Means for Solving the Problems]

[0010] To achieve the above object, the pathogen inspection fume hood of the present invention includes a housing main body that is isolated from the external space and has a work chamber as a work space for an operator to perform work inside, an operation opening formed in a part of the housing main body, through which the operator inserts a hand into the work chamber to operate an operation target in the work chamber from the outside, an exhaust fan that purifies the gas in the work chamber and can discharge it to the outside, a viewing window formed of a transparent member and provided in at least a part of the housing main body so that the inside of the work chamber can be visually recognized from the outside, and a replaceable bottom plate provided separately from the housing main body, which can be disposed at the bottom of the work chamber and is arranged to be able to enter and exit the work chamber.

[0011] In the pull hood for pathogen inspection of the present invention, a slit may be provided on the front side of the housing main body, through which the bottom plate can be inserted into and removed from the inside of the housing main body from the outside.

[0012] In the pull hood for pathogen inspection of the present invention, at least one accommodating portion capable of accommodating an operation target therein may be provided in a part of the bottom plate.

[0013] Further, the accommodating portion may be formed by bending a part of the bottom plate into a cylindrical shape.

Effect of the Invention

[0014] According to the pull hood for pathogen inspection of the present invention, when inspecting a sample, an operator can insert a hand through the operation opening, operate the operation target in the work chamber of the housing main body isolated from the external space while appropriately visually recognizing through the viewing window. At this time, since the exhaust fan can purify the gas in the work chamber and discharge it to the outside, the work chamber can be maintained at a negative pressure without releasing contaminants into the external space. Therefore, even if contaminants scatter from the operation target, they will not be released into the external space.

[0015] And since the bottom plate is provided separately from the housing main body and is replaceable and can be inserted into and removed from the bottom of the work chamber, even if contaminants fall to the bottom of the work chamber during the operation of the operation target or the droplets of contaminants scattered in the work chamber fall to the bottom of the work chamber and cause contamination, the bottom of the work chamber can be easily kept clean by removing the bottom plate from the housing main body and replacing it with a new bottom plate and arranging it.

[0016] Therefore, the next inspection can be performed in a clean work chamber without the labor required for cleaning the bottom or inner surface of the work chamber, and the sample for the next inspection will not be secondarily contaminated by the contaminants present in the work chamber, and high-precision inspection can be easily performed.

[0017] Therefore, it is possible to provide a pull hood for pathogen inspection that can accurately perform the next inspection without the labor such as cleaning work.

[0018] In the pathogen inspection laminar flow hood of the present invention, if at least one housing part capable of housing an object to be operated inside is provided in a part of the bottom plate, the housing part in which the object to be operated is housed can be provided so as to be replaceable together with the bottom plate. Therefore, when operating the object to be operated in the workroom, an operation of housing the object to be operated in the housing part can be performed as necessary, and since this housing chamber can also be kept clean, even if the operation of housing the object to be operated in the housing part is performed, the sample will not be secondarily contaminated.

[0019] Further, in the pathogen inspection laminar flow hood of the present invention, if the housing part is formed by bending a part of the bottom plate into a cylindrical shape, a three-dimensional housing part can be formed by bending it at the necessary time on the flat bottom plate. Therefore, it can be made compact during storage and distribution, etc., and at the time of use, the housing part can be formed by simple deformation and can be easily and frequently replaced. Moreover, at the time of use, the bottom of the workroom and the housing part can be handled integrally, so it is easy to use.

Brief Description of the Drawings

[0020]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Embodiments for Carrying Out the Invention

[0021] Hereinafter, the pathogen inspection pull hood according to the embodiments of the present invention will be described in detail with reference to the drawings.

[0022] The pathogen inspection pull hood of this embodiment is a box provided with a working space for isolating the operation target from the external space when an operator manually performs various processes on a sample.

[0023] The operation target is not particularly limited and is an instrument or the like that is operated by an operator to manually perform various processes on a sample in the inspection. The processes on the sample are also not particularly limited and are, for example, various unit operations performed by the operator during the inspection, such as sample transfer, storage, holding, collection, mixing, dissolution, separation, transfer, culture, analysis, etc.

[0024] Such a pathogen inspection pull hood is preferably used to prevent contaminants from scattering into the external space in an inspection using a sample or reagent containing contaminants that are not desired to scatter into the external space. In this embodiment, an example of an inspection box used by an operator to operate the operation target in a PCR (Polymerase Chain Reaction) inspection for inspecting the possibility of infection with, for example, the so-called novel coronavirus will be described. However, this inspection box may be used to prevent contaminants from scattering or leaking from the inspection target or test target into the external space in a PCR inspection for inspecting the possibility of infection with a virus other than the so-called novel coronavirus, any inspection other than the PCR inspection, various tests, and various trials.

[0025] As shown in Fig. 1, the pathogen inspection pull hood 10 of this embodiment includes a housing main body 12 in which a workroom 11 as a work space for an operator to perform inspection work manually is provided inside, isolated from the external space, an exhaust fan 13 capable of purifying the gas in the workroom 11 and discharging it to the outside, and a bottom plate 14 provided separately from the housing main body 12, which can be arranged at the bottom of the workroom 11 and is arranged to be able to enter and exit the workroom 11.

[0026] The housing main body 12 is formed of various materials that can maintain the rigidity for safely performing inspections and tests during the period of inspections and tests, and can prevent the gas scattered inside the housing main body 12 and the leaked liquid from leaking to the outside during inspections and tests. In this embodiment, since the pathogen inspection pull hood 10 is disposable for one or several inspections and tests, the housing main body 12 is formed of low-cost plate-shaped cardboard, such as corrugated cardboard. However, as long as the above-mentioned purposes can be achieved, the housing main body 12 can be formed of any material, such as synthetic resin, natural resin, wood, etc.

[0027] As shown in Figs. 1 to 3, the housing main body 12 has a quadrangular lower surface portion 21, a pair of side surface portions 22 provided in parallel to each other on both side edges of the lower surface portion 21, a front portion 23 provided on the front side facing the operator and arranged between the pair of side surface portions 22, a rear portion 26 provided on the rear edge of the lower surface portion 21 and arranged between the pair of side surface portions 22, and an upper surface portion 27 provided on the upper edges of the pair of side surface portions 22, the rear portion 26, and the front portion 23.

[0028] The front portion 23 has a front lower portion 24 on the lower surface portion 21 side and a front upper portion 25 provided to be inclined in a planar shape from the upper end of the front lower portion 24 to the upper surface portion 27.

[0029] On the upper part of the front surface 25, a viewing window 25a is provided so that an operator can visually check the inside of the workroom 11 from the outside. The viewing window 25a includes a rectangular window opening 25b formed in the upper part of the front surface 25, and a transparent member 25c formed of a transparent film or the like and attached around the window opening 25b to close the window opening 25b. As shown in FIG. 3, a sticking area 37 is formed between the peripheral edge of the transparent member 25c and the peripheral edge on the back surface side of the window opening 25b, and they are fixed by glue or the like respectively.

[0030] Note that the transparent member 25c of 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 enables the outside to be visible from the inside. Also, a sticking area 37 may be formed between the peripheral edge of the transparent member 25c and the peripheral edge on the front surface side of the window opening 25b, and they may be fixed by glue or the like respectively. Further, the transparent member 25c may be configured to be detachable from the housing main body 12, so that it can be detached from the housing main body 12, washed, and then attached to the housing main body 12 again for repeated use.

[0031] As shown in FIG. 1, on the lower part of the front surface 24, a pair of left and right operation openings 24a are formed for an operator to insert a hand into the workroom 11 and operate an operation target inside the workroom 11 from the outside. In this embodiment, the operation openings 24a are provided adjacent to the lower surface part 21, and the lower edge of each operation opening 24a is formed by the lower surface part 21.

[0032] A bottom plate slit 28 for inserting and removing the bottom plate 14 is formed between the lower part of the front surface 24 and the lower surface part 21.

[0033] The bottom plate slit 28 has a left - right length greater than or equal to the left - right width of the bottom plate 14 (the size in the left - right direction shown in FIG. 2). In this embodiment, since the lower part of the front surface 24 and the lower surface part 21 are spaced apart, the bottom plate slit 28 is formed across the entire width of the lower part of the front surface 24 and the lower surface part 21.

[0034] In addition, the bottom plate slit 28 has a vertical width (the vertical size shown in FIG. 2) that is equal to or greater than the thickness of the bottom plate 14. In the present embodiment, when the bottom plate 14 is taken out, a clearance is provided such that the upper surface of the bottom plate 14 does not contact the upper edge of the bottom plate slit 28. By setting the left - right length and the vertical width of the bottom plate slit 28 in this way, it is possible to prevent the gas scattered inside the housing body 12 or the leaked liquid from scattering or leaking to the outside of the housing body 12, while enabling the smooth insertion and extraction of the bottom plate 14 into and from the inside of the housing body 12.

[0035] As described above, in this embodiment, the housing body 12 is formed of a plate - like paper material such as cardboard.

[0036] In the present embodiment, the housing body 12 is formed by folding a plurality of plate - like paper materials having different shapes as shown in FIGS. 3(a) to 3(c) and assembling them into a three - dimensional shape.

[0037] Specifically, a first plate member 31 in which the lower surface portion 21, a pair of side surface portions 22, and the back surface portion 26 are flatly connected, a second plate member 32 in which the upper surface portion 27 and the upper front portion 25 are flatly connected, and a third plate member 33 having the lower front portion 24 are used.

[0038] In the first plate member 31, the side surface portions 22 are connected to both side edges of the back surface portion 26 via folding lines 34a, and the lower surface portion 21 is connected to the lower edge of the back surface portion 26 via a folding line 34b. Along the entire length of the upper edge of each side surface portion 22, a folding piece 35a that is arranged inside when assembled is provided, and along the entire length of the inclined edge of each side surface portion 22, a folding piece 35b that is arranged inside when assembled is provided.

[0039] In addition, an assembly slit 36a for connecting to the upper surface portion 27 is provided at the middle position of the upper edge of each side surface portion 22, an assembly slit 36b for connecting to the upper front portion 25 is provided at the middle position of the inclined edge, and an assembly slit 36c for connecting to the lower surface portion 21 is provided at the lower end side of each side surface portion 22.

[0040] On the entire length of the left and right side edges of the lower face portion 21, there are provided bent pieces 35c that are arranged on the inner side when assembled. Through these bent pieces 35c, bottom claw portions 21p that are inserted into the assembly slits 36c of each side face portion 22 from the inner side are provided on the left and right.

[0041] On the second plate material 32, an upper face portion 27 and a front upper portion 25 are connected and provided via a folding line 34c.

[0042] On the upper face portion 27, there is provided a through hole 27a for mounting the exhaust fan 13. Also, on the entire length of the rear edge of the upper face portion 27, there are provided bent pieces 35d that are arranged on the inner side when assembled. Further, on the left and right side edges of the upper face portion 27, there are provided upper face claw portions 27p that are inserted into the assembly slits 36a at the upper edges in the left and right side face portions 22 from the outer side.

[0043] On the front upper portion 25, there is provided a rectangular window opening 25b for forming the viewing window 25a.

[0044] At the intermediate positions of the left and right side edges in the front upper portion 25, there are provided front upper claw portions 25p that are inserted into the assembly slits 36b at the inclined edges in the left and right side face portions 22 from the outer side.

[0045] Also, on the entire length of the lower edge of the front upper portion 25, there are provided front bent pieces 35e that are arranged so as to overlap the outside of the front lower portion 24 when assembled. At a position overlapping the operation opening 24a of the front bent piece 35e, there is provided a notch 35f having a corresponding shape.

[0046] Furthermore, at the vertical intermediate position and the lower end (the upper end in the figure) of the front bent piece 35e, two front lower claw portions 24p for connecting to the front lower portion 24 from the outer side are provided so as to protrude in opposite directions from each other. One of the front lower claw portions 24p is formed by providing an arcuate notch at the intermediate position of the front bent piece 35e. The other front lower claw portion 24p is formed by protruding downward at the lower end of the front bent piece 35e.

[0047] The third plate member 33 has a lower front portion 24, and bending pieces 35g that are disposed inward when assembled are provided along the entire lengths of the left and right side edges of the lower front portion 24. Further, bending pieces 35h that are disposed inward when assembled are provided along the entire length of the upper edge of the lower front portion 24.

[0048] To assemble the housing body 12 by bending the first to third plate members 31, 32, and 33 in this manner, a transparent member 25c such as a transparent film is attached in advance to the upper front portion 25 of the second plate member 32 shown in FIG. 3(b) to close the window opening 25b with the transparent member 25c. For example, as shown in FIG. 3(b), the attachment regions 37 provided around the entire circumference on the back side of the window opening 25b of the upper front portion 25 and around the entire circumference on the front side of the transparent member 25c are attached to each other.

[0049] First, the lower surface portion 21, the pair of side surface portions 22, and the back surface portion 26 of the first plate member 31 are bent along the bending lines 34a and 34b, respectively, and the bending piece 35c at the side edge of the lower surface portion 21 is bent. The pair of bending pieces 35c at the side edges are disposed inside the pair of side surface portions 22, and the respective bottom claws 21p are inserted into the assembly slits 36c at the lower end sides of the side surface portions 22 from the inside. Thereby, the first plate member 31 is formed into a three-dimensional shape.

[0050] Further, the left and right side edges and the upper edge of the lower front portion 24 of the third plate member 33 are bent to bend the bending pieces 35g and 35h.

[0051] The outer surfaces of the bending pieces 35g at both side edges of the lower front portion 24 and the attachment regions 37 provided on the inner surfaces near the front ends of the pair of side surface portions 22 of the first plate member 31 are attached to each other. At this time, a bottom plate slit 28 is formed along the entire length between the lower front portion 24 and the lower surface portion 21.

[0052] The bending piece 35d at the rear edge of the upper surface portion 27 of the second plate member 32 is bent, and the upper surface portion 27 and the upper front portion 25 are bent along the bending line 34c, and the upper front portion 25 and the front bending piece 35e are bent to form the second plate member 32.

[0053] Attach the attachment area 37 provided on the entire inner surface of the bent piece 35d at the rear edge of the upper face part 27 and the attachment area 37 provided on the upper edge side of the back face part 26 of the back face part 26.

[0054] Bend the upper face claws 27p at the left and right side edges of the upper face part 27 and insert them into the assembly slits 36a at the upper edges of the respective side face parts 22 from the outside.

[0055] Attach the exhaust fan 13 to this upper face part 27.

[0056] Also, bend the front upper claws 25p at the left and right side edges of the upper front part 25 and insert them into the assembly slits 36b at the inclined edges of the respective side face parts 22 from the outside.

[0057] Furthermore, arrange the front bent piece 35e outside the lower front part 24, and insert the lower front claws 24p provided so as to protrude in opposite directions into the assembly slits 36d provided vertically in the lower front part 24 from the outside.

[0058] Thus, the housing body 12 can be assembled.

[0059] The exhaust fan 13 is attached to the through hole 27a of the upper face part 27. Although detailed illustration is omitted, it includes a suction drive part 13a arranged at the upper part of the upper face part 27 and a filter part 13b arranged at the lower part of the upper face part 27 and detachably connected to the suction drive part 13a.

[0060] This exhaust fan 13 is attached by sandwiching the periphery of the through hole 27a of the upper face part 27 between the suction drive part 13a and the filter part 13b when connecting the suction drive part 13a and the filter part 13b.

[0061] 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 such as a dry battery (not shown). The suction drive unit 13a drives the electric motor (not shown) with the power supplied from the power source (not shown) to rotate the fan (not shown), and forcibly causes air to flow from one side (here, the inside of the housing main body 12) to the other side (the outside of the housing main body 12).

[0062] The filter unit 13b is equipped with a filter (not shown) capable of capturing contaminants that may be contained in the gas in the work chamber 11. By passing the gas in the work chamber 11 through the filter unit 13b and discharging it to the outside, the gas can be purified and discharged to the outside.

[0063] Similar to the housing main body 12, the bottom plate 14 is formed of various materials that can maintain a form for safely conducting inspections and tests during the period of conducting inspections and tests, and can prevent gas scattered inside the housing main body 12 and leaked liquid from leaking to the outside during inspections and tests. In this embodiment, for disposable use in one or several inspections and tests, the bottom plate 14 is formed of low-cost plate-shaped cardboard of the same material as the housing main body 12, such as corrugated cardboard. However, as long as the above-mentioned purposes can be achieved, the bottom plate 14 may be formed of any material such as synthetic resin, natural resin, wood, etc.

[0064] As shown in FIG. 4, the bottom plate 14 includes a flat portion 41 disposed along the lower surface portion 21 of the housing main body 12, and a housing portion 42 provided integrally with the flat portion 41 on a part of the back surface portion 26 side of the work chamber 11 of the housing main body 12 and capable of housing an operation target therein.

[0065] The bottom plate 14 has a size larger than the working area for the operator to operate the operation target in the work chamber 11. In this embodiment, it has a left-right width substantially equal to the left-right width dimension of the lower surface portion 21 of the housing main body 12, and a front-rear length longer than the depth dimension of the lower surface portion 21.

[0066] The flat portion 41 is provided over the entire part except for the housing portion 42 and its adjacent positions on the left and right, and is placed on the lower surface portion 21 of the housing main body 12.

[0067] Two housing portions 42 are provided adjacent to each other on the left and right, and each has a rectangular tube shape in cross section extending in the front-rear direction. Each housing portion 42 has a bottom wall 43 continuously integrated with the flat portion 41, an upper wall 44 facing the bottom wall 43, and side walls 45 erected between the bottom wall 43 and the upper wall 44. The adjacent housing portions 42 are partitioned by a common side wall 45. Also, the ends in the front-rear direction (the upper side direction shown in FIG. 5 is the front direction, and the lower side direction is the rear direction) are open. However, in the state where the bottom plate 14 is completely accommodated in the housing main body 12, the front-side opening of the housing portion 42 abuts against the back surface portion 26 of the housing main body 12, and the opening is closed by the back surface portion 26 (see FIG. 1).

[0068] In the state where this bottom plate 14 is attached to the housing main body 12, as shown in FIGS. 1 and 2(a)(b), the flat portion 41 is arranged in a state of protruding from the housing main body 12 to the front side. The protruding portion makes it easier for an operator (not shown) to grip when pulling out the bottom plate 14 from the housing main body 12 as described later. In addition, as a configuration for making it easier to grip the bottom plate 14, instead of the above configuration, a part of the portion that comes to the front side when the bottom plate 14 is attached to the housing main body 12 is formed in a protruding shape extending to the front side, or a hole portion or a concave portion for making it easier for an operator (not shown) to grip the bottom plate 14 is provided in a part of the housing main body 12, and various modifications may be used.

[0069] Also, the left-right positions of the two housing portions 42 are provided corresponding to the left-right positions of the operation opening 24a in the housing main body 12, and the left-right width of the two housing portions 42 is provided to be equal to or less than the left-right width at the lower end of the operation opening 24a.

[0070] Therefore, when the bottom plate 14 is attached to the housing body 12, as shown in Fig. 2(a), in a front view, the two accommodating portions 42 are arranged in the operation opening 24a of the housing body 12. This makes it easier to insert and remove the bottom plate 14 having the accommodating portions 42 larger than the vertical width of the bottom plate slit 28 of the housing body 12 into and out of the working chamber 11 of the housing body 12.

[0071] The bottom plate 14 is formed of a paper material such as cardboard.

[0072] In this embodiment, the bottom plate 14 is formed from a single piece of cardboard as shown in the developed view of Fig. 6, and by bending and assembling a part thereof, two three-dimensional accommodating portions 42 are formed.

[0073] Specifically, as shown in Fig. 6, by providing a cut 47 and a cutout region 48 at one corner side of the rectangular cardboard, a forming region of the accommodating portion 42 for forming the two accommodating portions 42 is provided.

[0074] The forming region of the accommodating portion 42 includes a bottom wall 43 that is continuously used for the two accommodating portions 42 without a partition from the flat portion 41, side walls 45 provided on both the left and right sides of the bottom wall 43 via folding lines 49, two upper walls 44 provided via the folding lines 49 with the respective side walls 45, partial side walls 45a provided via the folding lines 49 with a part of each upper wall 44, and a substantially triangular connecting piece 51 that is continuously provided without a partition with the remaining portions of the respective upper walls 44 and is connected to the upper walls 44 of the accommodating portions 42 adjacent to each other.

[0075] The two partial side walls 45a provided via the folding lines 49 with a part of the two upper walls 44 are formed in opposite directions to each other. In a state where the two accommodating portions 42 are formed, the two partial side walls 45a are arranged adjacent to each other in the front-rear direction so as to constitute a common side wall 45 that partitions between the two accommodating portions 42.

[0076] In the two partial side walls 45a, the sum of the respective folding ribs 49 is provided to be substantially equal to the front-rear length of each accommodating portion 42, and in a state where the two accommodating portions 42 are formed, the end portions on the side adjacent in the front-rear direction are formed in a shape protruding in the front-rear direction toward the lower end side.

[0077] Therefore, in a state where the two accommodating portions 42 are formed, the end portion of one partial side wall 45a can be locked to the end portion of the other partial side wall 45a, and it is possible to constitute a series of side walls 45 in which the partial side walls 45a are connected in the front-rear direction.

[0078] In addition, hook portions 52 are provided at the tips of substantially triangular connecting pieces 51 provided without partition on the remaining portions of each upper wall 44 where the partial side walls 45a are not provided. The hook portions 52 of the respective connecting pieces 51 can be locked to connecting slits 53 formed in the upper walls 44 of the accommodating portions 42 adjacent to each other in a state where the two accommodating portions 42 are formed, and the upper walls 44 of the accommodating portions 42 adjacent to each other can be connected to each other.

[0079] To use such a pull hood 10 for pathogen inspection, as shown in FIG. 7, the housing main body 12 is assembled in a state where the exhaust fan 13 is mounted in advance, and the bottom plate 14 is prepared in a state where the accommodating portion 42 is assembled. The bottom plate 14 is inserted through the bottom plate slit 28 and the operation opening 24a of the housing main body 12 and arranged on the lower surface portion 21 of the housing main body 12.

[0080] Also, by driving the exhaust fan 13, the air in the working chamber 11 is constantly exhausted to keep the inside of the working chamber 11 at a negative pressure.

[0081] For example, when inspecting the presence or absence of a predetermined contaminant by analyzing a sample obtained by previously collecting a specimen with a sampler or the like and appropriately storing it in a solution using an analytical instrument such as a chromatograph, first, the sample is sealed in a sealed container 61 and carried into the working chamber 11 through the operation opening 24a. Also, the sampler 62 and the analytical instrument 63 are carried into the working chamber 11 through the operation opening 24a.

[0082] Here, the sealed container 61, the sampler 62, and the analyzer 63 are all objects to be operated by the operator.

[0083] Further, at least a part of the analysis unit 63a of the analyzer 63 is provided with an open portion 64 that is arranged in a constantly open state. In the case of an analyzer 63 such as a chromatograph, a portion for supplying a sample or the like serves as the open portion 64.

[0084] The operator inserts a hand into the working chamber 11 while protecting it with a protective glove or the like through two operation openings 24a, and while visually observing through the viewing window 25a, opens the sealed container 61 and collects a sample using the sampler 62. By supplying this sample to the open portion 64 of the analyzer 63, the analysis in the analysis unit 63a is started.

[0085] During the analysis period, it is necessary to place the analyzer 63 stationary in the working chamber 11. At this time, the analyzer 63 is housed in the cylindrical housing portion 42. Although all of the analyzers 63 may be housed in the housing portion 42, in this embodiment, since the analyzer 63 is longer than the housing portion 42, the open portion 64 of the analyzer 63 is housed in the cylindrical housing portion 42 like a virtual line.

[0086] The exhaust fan 13 is driven even during the analysis period, purifying and exhausting the air in the working chamber 11 so that the inside of the working chamber 11 is maintained at a negative pressure. Therefore, air from the external space flows into the working chamber 11 through the operation opening 24a, and is discharged from the exhaust fan 13 via the working chamber 11, generating an air flow in the working chamber 11.

[0087] Since the open portion 64 of the analyzer 63 is constantly exposed to the atmosphere in the working chamber 11, if it is placed stationary in the working chamber 11 during the analysis period, the air flow in the working chamber 11 directly contacts the open portion 64, causing the contained components of the sample and the components of the mobile phase to vaporize excessively, or contaminants to scatter excessively, etc., resulting in fluctuations in the analysis conditions and inspection environment and a decrease in analysis accuracy.

[0088] Therefore, by accommodating at least the open part 64 of the analytical instrument 63 in the accommodating part 42, it is possible to prevent the air flow in the working chamber 11 from directly contacting the open part 64 of the analytical instrument 63, and to stably and accurately perform inspections. In this embodiment, when the bottom plate 14 is fully accommodated inside the housing main body 12, the opening at the front side of the accommodating part 42 abuts against the back surface part 26 of the housing main body 12 and is closed, so the air flow in the accommodating part 42 is suppressed, and it is possible to suppress gaseous or particulate contaminants from scattering onto the housing main body 12.

[0089] According to the pathogen inspection fume hood 10 of the present embodiment as described above, when an operator inserts a hand through the operation opening 24a and appropriately visually observes through the viewing window 25a, and operates the operation target to inspect a sample within the working chamber 11 of the housing main body 12 isolated from the external space, the exhaust fan 13 can purify the gas in the working chamber 11 and discharge it to the outside. Therefore, the inside of the working chamber 11 can be maintained at a negative pressure without releasing contaminants into the external space. Therefore, even if contaminants scatter into the working chamber 11 from the operation target, they will not be released into the external space.

[0090] And since the bottom plate 14 is provided separately from the housing main body 12 and is arranged to be able to enter and exit the bottom of the working chamber 11, even if contaminants fall to the bottom of the working chamber 11 during the operation of the operation target, or the working chamber 11 is contaminated by droplets of contaminants scattered in the working chamber 11 falling to the bottom of the working chamber 11, the bottom plate 14 can be taken out of the housing main body 12 and discarded, replaced with a new bottom plate 14, and the replaced bottom plate 14 can be arranged inside the housing main body 12, so that the bottom of the working chamber 11 can be easily kept clean.

[0091] Furthermore, since the housing main body 12 is made of paper, even if droplets of contaminants scattered in the working chamber 11 adhere to and contaminate the inner surface, it is easy to discard the housing main body 12 and replace it with a new housing main body 12, and the inner surface of the working chamber 11 can be easily kept clean.

[0092] Therefore, the next inspection can be carried out in the clean working chamber 11 without the labor of cleaning the bottom and the inner surface of the working chamber 11. The sample of the next inspection will not be secondarily contaminated by the contaminants present in the working chamber 11, and a highly accurate inspection can be easily performed.

[0093] In the pull - hood 10 for pathogen inspection of the present embodiment, at least one accommodating portion 42 capable of accommodating an operation target therein is provided in a part of the bottom plate 14. Thereby, the accommodating portion 42 in which the operation target is accommodated can be provided so as to be replaceable together with the bottom plate 14. Therefore, when operating the operation target in the working chamber 11, an operation of accommodating the operation target in the accommodating portion 42 can be performed as necessary. Since this accommodating chamber can also be kept clean, even if the operation of accommodating the operation target in the accommodating portion 42 is performed, the sample will not be secondarily contaminated.

[0094] In the pull - hood 10 for pathogen inspection of the present embodiment, since the bottom plate 14 is made of paper, while giving the bottom plate 14 the rigidity required for inspection and having a function of suppressing the scattering of contaminants, etc., it can be formed at low cost and the bottom plate 14 can be easily disposable. And by disposing of the bottom plate 14, tests can be easily carried out in a clean environment.

[0095] In the pull - hood 10 for pathogen inspection of the present embodiment, the accommodating portion 42 is formed by bending a part of the paper - made bottom plate 14 into a cylindrical shape. Therefore, since the flat bottom plate 14 can be bent at the necessary time to form a three - dimensional accommodating portion 42, it can be made compact during storage and distribution, and at the time of use, the accommodating portion 42 can be formed by simple deformation, and it is easy to frequently replace and use. Moreover, since the bottom of the working chamber 11 and the accommodating portion 42 can be handled integrally during use, it is easy to use.

[0096] Also, since the accommodating portion 42 is formed by deforming a part of the bottom plate 14, the bottom plate 14 and the accommodating portion 42 can be formed of the same material, and handling during manufacturing and disposal is also easy.

[0097] Incidentally, the above embodiments can be appropriately modified 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 surfaces 22, a front surface 23, and a rear surface 26 stand upright from a rectangular bottom surface portion 21, and an inclined surface is provided on the front surface 23, but the shape of the housing body 12 is not limited at all.

[0098] Also, in the above embodiment, an example in which two operation openings 24a are arranged side by side on the bottom plate 14 has been described, but it is not particularly limited. The operation openings 24a may be provided separately, one at each of the left and right ends of the bottom plate 14, or may be provided at any location other than the ends of the bottom plate 14. Furthermore, there may be one operation opening 24a, or three or more operation openings 24a may be provided.

Explanation of Reference Numerals

[0099] 10 Pull hood for pathogen inspection 11 Workroom 12 Housing body 13 Exhaust fan 13a Suction drive unit 13b Filter unit 14 Bottom plate 21 Bottom surface portion 21p Bottom surface claw portion 22 Side surface portion 23 Front surface portion 24 Lower front portion 24a Operation opening 24p Lower front claw portion 25 Upper front portion 25a Peephole 25b Window opening 25c Transparent member 25p Upper front claw portion 26 Rear surface portion 27 Upper surface portion 27a Through hole 27p Upper surface claw portion 28 Slit for bottom plate 31 First plate material 32 Second plate material 33 Third plate material 34a~34c Ribs 35a to 35d, 35g, 35h folding pieces 35e front folding piece 35f notch 36a to 36d assembly slits 37 pasting area 41 flat part 42 accommodating part 43 bottom wall 44 upper wall 45 side wall 45a partial side wall 47 notch 48 excision area 49 folding rib 51 connecting piece 52 hook part 53 connecting slit 61 sealed container 62 sampler 63 analytical instrument 63a analysis part 64 opening part

Claims

1. A housing main body having a workroom inside as a work space for an operator to perform work, which is isolated from the external space, An operation opening formed in a part of the housing main body, through which the operator inserts a hand into the workroom to operate an operation target in the workroom from the outside, An exhaust fan capable of purifying the gas in the workroom and discharging it to the outside, A viewing window formed of a transparent member and provided in at least a part of the housing main body, through which the inside of the workroom can be visually recognized from the outside, A replaceable bottom plate provided separately from the housing main body, which can be disposed at the bottom of the workroom and is arranged to be able to enter and exit the workroom, A pathogen inspection pull hood, characterized in that a slit is formed on the front side of the housing main body to enable the bottom plate to be taken in and out from the outside to the inside of the housing main body.

2. A housing main body having a workroom inside as a work space for an operator to perform work, which is isolated from the external space, An operation opening formed in a part of the housing main body, through which the operator inserts a hand into the workroom to operate an operation target in the workroom from the outside, An exhaust fan capable of purifying the gas in the workroom and discharging it to the outside, A viewing window formed of a transparent member and provided in at least a part of the housing main body, through which the inside of the workroom can be visually recognized from the outside, A replaceable bottom plate provided separately from the housing main body, which can be disposed at the bottom of the workroom and is arranged to be able to enter and exit the workroom, A pathogen inspection pull hood, characterized in that at least one accommodating portion capable of accommodating the operation target inside is provided in a part of the bottom plate.

3. The pathogen inspection pull hood according to claim 1, characterized in that at least one accommodating portion capable of accommodating the operation target inside is provided in a part of the bottom plate.

4. The housing unit is formed by bending a part of the bottom plate into a cylindrical shape, and is the pathogen inspection pull hood according to claim 2 or 3.

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