JP2019000817A - Fume hood and its hood body - Google Patents

Abstract

To provide a fume hood capable of improving visibility and workability.SOLUTION: A fume hood 1 includes a working table 2 installed in a workroom, and a hood body 3 arranged so as to cover a work plane 21 of the working table 2. A bearing member 30 is provided on an upper part of the hood body 3. Such a constitution is adopted that the hood body 3 is suspended from a ceiling wall 91 of the workroom by fixing the bearing member 30 to the ceiling wall 91 of the workroom.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a fume hood used when a chemical experiment or the like is performed in a laboratory or a laboratory, and a hood main body thereof.

  In a laboratory, a laboratory, or the like, as shown in Patent Documents 1 and 2, experiments such as chemical reaction, heat treatment, decomposition, and extraction may be performed using a fume hood, which is also called a draft chamber.

  The fume hood surrounds the experiment space (work space) on the work table (work table) from the outside air so that the environment in the laboratory is not impaired by pollutant gases such as harmful gases and odorous gases generated during the experiment. In general, an intake-type hood main body (chamber main body) having an internal space as a work space for experiments or the like is provided, and an up-and-down slide type elevating door is provided in the front opening of the hood main body. The hood is opened from the front opening by sucking and discharging the air in the hood body through the exhaust duct at the upper end of the hood body while opening the elevating door and allowing the operator to insert a hand into the hood body. Outside air is allowed to flow into the body to prevent the pollutant gas in the hood body from being diffused from the front opening into the laboratory.

JP 2002-364896 JP 2010-115580 A

  In the conventional fume hoods as shown in Patent Documents 1 and 2, the main part of the hood main body is made of metal, and the hood main body is provided with a duct-related part for suction and discharge, a lifting door, and a desired door. Since various devices such as a balance weight (weight) for holding in the lift position and a lighting fixture are attached, the hood main body becomes heavy. Since the load of the hood main body needs to be supported by the pillars provided at the four corners of the hood main body, the pillar needs to have sufficient strength, and the pillar becomes thick and large. If the support becomes thicker in this way, the size of the viewing window (glass plate) provided between the front and rear support posts on both sides of the hood body will be reduced, and the work object (experimental object) on the workbench will be reduced. There has been a problem in that there is a risk that workability may be lowered due to a decrease in visibility.

  In addition, since the hood body is heavy, the work table on which it is placed needs to ensure sufficient strength to reliably prevent collapse during an earthquake, etc. There is also a problem that the cost may increase.

  The present invention has been made in view of the above problems, and has a fume hood and its hood main body that can improve visibility and workability, and can reduce the weight and cost of the workbench. The purpose is to provide.

  In order to solve the above problems, the present invention comprises the following means.

[1] A fume hood comprising a workbench installed in a work room and a hood body arranged to cover the work surface of the workbench,
A support member is provided on the top of the hood body,
The fume hood is configured so that the hood body is suspended from the ceiling wall of the work room by fixing the support member to the ceiling wall of the work room.

[2] The hood body is provided with struts at its four corners,
The fume hood according to claim 1, wherein the support member is fixed to an upper portion of the support column, and the support member is fixed to a reinforcing member provided on a ceiling wall of a work room.

[3] A vertical slide type elevator door is provided at the front opening of the hood main body so as to be opened and closed.
A curtain is provided above the front opening in the hood body,
3. The fume hood according to claim 1 or 2, wherein a balance weight for balancing the weight of the lift door and holding the lift door at a desired lift position is disposed along the inner surface of the curtain plate.

[4] A partition top plate is provided above the work surface in the hood body,
The partition top plate is constituted by a transmission plate having light diffusibility, and a light source is disposed above the partition top plate,
4. The fume hood according to any one of the preceding items 1 to 3, wherein an optical ceiling having a lower surface of the partition top plate as a surface light source is configured by the light source and the partition top plate.

[5] A fume hood main body arranged to cover a work surface of a work table installed in the work room,
A support member is provided at the top,
A hood main body of a fume hood characterized in that the hood main body itself is suspended from the ceiling wall of the work chamber by fixing the support member to the ceiling wall of the work chamber.

  According to the fume hood of the invention [1], since the hood main body arranged on the work table is suspended from the ceiling wall of the work room, it is not necessary to support the entire load of the hood main body with its own column. The strength of the support can be reduced. For this reason, the thickness of the column can be reduced, and the size of the observation window provided between the columns can be increased by that amount, thereby improving the visibility and workability for the work object on the workbench. be able to. Furthermore, in the fume hood of the present invention, since the load of the hood main body is supported by the ceiling wall of the work room, it is not necessary to support the entire load of the hood main body by the work table. For this reason, the strength of the work table can be reduced, and the cost can be reduced while reducing the weight of the work table.

  According to the fume hood of the invention [2], the hood main body can be suspended more reliably on the ceiling wall of the work chamber.

  According to the fume hood of the invention [3], the balance weight for holding the elevating door at a desired elevating position is arranged along the inner surface side of the curtain in the hood main body. Compared with the case where it is provided inside or inside the column, it is not necessary to conceal the balance weight by the column, and the thickness of the column can be further reduced. Therefore, the size of the viewing window and the like can be further increased, and the visibility and workability can be further improved.

  According to the fume hood of the invention [4], since the light ceiling that uniformly shines the entire lower surface of the partition top plate provided above the work surface is adopted, the entire work surface is uniformly brightened. Can be irradiated. For this reason, it becomes easy to observe the work object on the work table in detail, and the workability can be improved also from this point.

  According to the hood body of the fume hood of the invention [5], as in the case of the invention [1], it is possible to improve visibility, improve workability, reduce the weight of the work table, and reduce costs.

FIG. 1 is a front view showing a fume hood according to an embodiment of the present invention. FIG. 2 is a front sectional view showing the fume hood of the embodiment. FIG. 3 is a side sectional view showing the fume hood of the embodiment. FIG. 4 is a perspective view schematically showing a hood main body applied to the fume hood of the embodiment. FIG. 5 is a perspective view for explaining the structure around the lifting door in the fume hood of the embodiment.

  1 is a front view showing a fume hood 1 according to an embodiment of the present invention, FIG. 2 is a front sectional view of the fume hood 1, FIG. 3 is a side sectional view of the fume hood 1, and FIG. It is a perspective view which shows the applied hood main body 3 roughly.

  As shown in these drawings, the fume hood 1 of the present embodiment is installed in an indoor work room such as a laboratory or a laboratory. The fume hood 1 has a substantially symmetric structure in the front-rear direction, and in the following description, the front side is used in the meaning including the rear side.

  As shown in FIGS. 1 to 4, the fume hood 1 of the present embodiment includes a work table 2 as a base such as an experimental table and a hood main body 3 arranged on the upper side of the work table 2. As prepared.

  The work table 2 has an upper end surface (top surface) configured as a work surface 21, and an operator performs work such as experiments and research on the work surface 21.

  The hood main body 3 has a substantially box-like shape with an open lower end, and support columns 31 are erected along the vertical direction at four corner portions on the front, rear, left and right sides.

  A crosspiece 30 is attached between the upper ends of the columns 31, 31 adjacent to the left and right in the hood body 3. As will be described in detail later, in the present embodiment, the crosspiece member 30 constitutes a support member, and the hood main body 3 can be suspended from the ceiling wall 91 of the work room via the crosspiece member (support member) 30. It is like that.

  On both side surfaces of the hood body 3, a transparent glass plate as a viewing window 32 is fixed so as to close the space between the front and rear support columns 31, 31. A curtain plate 33 is fixed on the upper front surface of the hood body 3 so as to close the space between the left and right support columns 31. Further, on the front surface of the hood body 3, a transparent glass plate as a fixed window 34 is fixed below the curtain plate 33. Further, on the front surface of the hood body 3, the lower side of the fixed window 34 is opened forward, and the open portion is configured as a front opening 35. The operator inserts his / her hand onto the work surface 21 of the work table 2 through the front opening 35 and can perform work such as experiments on the work surface 21.

  An intermediate rail member 36 is provided at an intermediate position in the left-right direction of the curtain plate 33 along the vertical direction. The intermediate rail member 36 is disposed such that the lower end portion protrudes from the upper portion of the front opening 35. On both sides of the intermediate rail member 36, door support rails are provided for supporting the side edge of the glass plate as the lifting door 37 so as to be slidable in the vertical direction.

  In addition, door support rails are provided inside the support columns 31 on both the left and right sides for slidably supporting the side edges of the elevating door 37 along the vertical direction. Two elevating doors 37 and 37 are attached to the front opening 35. That is, one side edge (outer edge measuring portion) of the lifting door 37 is supported by the door support rail of the support column 31 so as to be slidable in the vertical direction, and the other side edge (inner edge) of the lifting door 37 is provided. The intermediate rail member 36 is supported by the door support rail so as to be slidable in the vertical direction. Thereby, each elevator door 37 is supported slidably in the vertical direction. For example, by sliding the elevator door 37 upward, the front opening 35 is opened, and by sliding the elevator door 37 downward, the front door 35 is opened. The opening 35 is configured to be closed.

  FIG. 5 is a perspective view for explaining a holding mechanism for holding the elevating door 37 at a desired elevating position. As shown in FIGS. 3 and 5 and the like, a rotary shaft 51 is rotatably attached to the upper part on the inner surface side of the curtain plate 33 of the hood main body 3 so as to be horizontally arranged along the left-right direction. Fixed pulleys (fixed pulleys) 52 and 52 are rotatably attached to both ends of 51 corresponding to both ends of the lift door 37. Further, one end of each of the wires 54 and 54 is fixed to both sides of the upper end surface of the elevating door 37, and the wires 54 and 54 are installed on the fixed pulleys 52 and 52 and the movable pulleys (movable pulleys) 53 and 53, respectively. The other ends of the wires 54 and 54 are fixed to a strength member such as the cross member 30 of the hood body 3. Further, a long bar-shaped balance weight 5 is attached to the movable pulleys 53 and 53 so as to bridge between them.

  In the present embodiment, the elevating door 37 is adjusted so as to be balanced with respect to the balance weight 5 via the pulleys 52 and 53. For this reason, even if the elevating door 37 is slid up and down to release the elevating door 37, the elevating door 37 can be held in its sliding position (open position). Therefore, the elevator door 37 can be maintained in a fully open state, a half open state, or a small amount opened as required.

  In the present embodiment, the balance weight 5 is formed in a bar shape, and this bar-shaped balance weight 5 is horizontally disposed on the back side (inner surface side) of the curtain plate 33 in the hood body 3 along the left-right direction. ing.

  The hood body 3 is provided with a partition top plate 41 so as to partition the inside of the hood body 3 vertically. In the fume hood 1 of the present embodiment, the space below the partition top plate 41 inside the hood body 3, that is, the space between the work surface 21 and the partition top plate 41 inside the hood body 3 is the work space 22. It is configured. In other words, the partition top plate 41 is disposed along the upper end surface of the work space 22.

  Moreover, in this embodiment, the partition top plate 41 is comprised by the light diffusable permeation | transmission board (semi-transparent board) comprised with milky white resin etc. Furthermore, a light source 42 such as an LED or a fluorescent lamp is disposed above the partition top plate 41 inside the hood body 3. The light emitted downward from the light source 42 diffuses and scatters when passing through the partition top plate 41, so that the diffused light is irradiated downward with uniform brightness from the entire lower surface of the partition top plate 41. Thus, the work surface 21 is irradiated. That is, in the present embodiment, the partition ceiling plate 41 and the light source 42 constitute an optical ceiling (light curtain ceiling) that is a surface light source that uniformly shines the entire lower surface of the partition ceiling plate 41.

  Further, an exhaust duct 6 is arranged horizontally along the left-right direction above the partition top plate 41 inside the hood body 3. The lower end of the exhaust damper 61 provided on the lower side of the exhaust duct 6 passes through the partition top plate 41 and opens into the work space 22. Further, the upper end of the exhaust damper 61 is connected to the exhaust duct 6. In the present embodiment, the inside of the exhaust duct 6 is sucked and exhausted by a suction / exhaust mechanism (not shown), whereby the air in the work space 22 of the hood body 3 is discharged through the damper 61 and the exhaust duct 6, While the pressure 22 is set to a negative pressure, external air is sucked into the hood body 3 from the front opening 35 by the negative pressure, and the contaminated gas in the work space 22 is prevented from leaking to the outside. .

  The fume hood 1 is assembled by suspending the hood main body 3 having the above configuration from the ceiling wall 91 of the work room in a state where the hood main body 3 is arranged so as to cover the work table 2.

  That is, the reinforcing member 92 is fixed to the fixing region of the hood main body 3 on the back side of the ceiling wall 91 of the work room. The reinforcing member 92 is connected to, for example, a structural material of a building that constitutes a work room, and is configured to withstand a high load. Then, in a state where the crosspiece member 30 of the hood main body 3 faces the reinforcing member 92 of the ceiling wall 91 through the ceiling wall 91, a fixing tool 95 such as a bolt and a nut that penetrates the crosspiece member 30, the ceiling wall 91 and the reinforcing member 92. Accordingly, the crosspiece member 30 is connected and fixed to the reinforcing member 92. Accordingly, the hood main body 3 is suspended from the reinforcing member 92 of the ceiling wall 91 so that almost the entire load of the hood main body 3 is supported by the reinforcing member 92 of the ceiling wall 91. In this state, as described above, the hood body 3 is disposed so that the upper part of the work table 2 (work space 22) is covered.

  In the fume hood 1 of the present embodiment configured as described above, since the hood main body 3 disposed on the work table 2 is suspended from the ceiling wall 91, the hood main body of the hood main body as in the conventional fume hood is used. It is not necessary to support the entire load only with its own struts, and the strength of the struts 31 can be reduced. For this reason, the thickness (width) of the support 31 can be reduced, and accordingly, the size of the viewing window 32 provided between the front and rear supports 31 on both sides can be increased. The area can also be increased. Therefore, the visibility with respect to the work object (experiment object) on the work table 2 can be improved, and workability can also be improved.

  Furthermore, in this embodiment, since the load of the hood main body 3 is supported by the ceiling wall 91, it is not necessary to support the entire load of the hood main body 3 by the work table 2. For this reason, the strength of the work table 2 can be reduced, the structure of the work table 2 can be simplified and the weight can be reduced, and the cost can be reduced.

  Further, in the fume hood 1 of the present embodiment, the balance weight 5 for holding the elevating door 37 at a desired elevating position is arranged along the inner surface side (rear surface side) of the curtain plate 33 at the upper front of the hood body 3. Therefore, the thickness of the column 31 can be further reduced. That is, in many conventional fume hoods, the balance weight is concealed by disposing a balance weight inside the semi-hollow strut or by placing a balance weight inside the strut. As described above, in the conventional fume hood, since the balance weight is concealed by the support column, the thickness of the support column becomes larger and the size of the observation windows on both side surfaces may be further reduced. There is.

  On the other hand, in the fume hood 1 of the present embodiment, the balance weight 5 is arranged along the inner surface of the curtain plate 33 above the partition top plate 41, so that the balance weight 5 is placed inside and around the column 31. There is no need to arrange them, and the thickness of the column 31 can be further reduced. Therefore, the size of the viewing window 32 and the size of the front opening 35 can be further increased, and the visibility and workability can be further improved.

  In the fume hood of the present embodiment, an optical ceiling that uniformly shines the entire lower surface of the partition top plate 41 provided above the work surface 21 is employed. Can be illuminated with uniform brightness. For this reason, it becomes easy to observe the work object on the work table 2 in detail, and the workability can be further improved from this point.

  In the above embodiment, the crosspiece member 30 of the hood main body 3 is fixed to the reinforcing member 92 of the ceiling wall 91 by the fasteners 95 such as bolts and nuts. However, in the present invention, the hood main body 3 The means for fixing the supporting member such as the crosspiece member 30 to the ceiling wall 91 is not particularly limited, and any fixing means may be used. For example, the support member of the hood body 3 may be fixed to the reinforcing member 92 of the ceiling wall 91 by welding.

  In the above-described embodiment, the reinforcing member 92 is attached to the ceiling wall 91 and the hood body 3 is fixed to the reinforcing member 92. However, the present invention is not limited to this. For example, the ceiling wall has a predetermined strength such as a structural material. In the case where a strength member having the above is present in advance, the hood main body 3 may be directly fixed to the strength member of the ceiling wall.

  In the above embodiment, the ceiling wall 91 supports almost the entire load of the hood main body 3. However, the present invention is not limited to this, and in the present invention, at least a part of the load of the hood main body is supported by the ceiling wall. What is necessary is just to comprise. However, in the present invention, in order to sufficiently obtain the effects of the present invention, such as an improvement in visibility and workability, it is preferable that the hood main body is configured to support almost the entire load on the ceiling wall.

  Moreover, in the said embodiment, although the case where this invention was applied to the fume hood of a back-and-front symmetrical shape was mentioned as an example and demonstrated, this invention can be applied also to a fume hood of a front-back asymmetric shape. For example, the present invention can also be applied to a fume hood that has an opening with a lift door on one side of the front side and the rear side, and the other side closed by a fixed glass plate or the like.

  The fume hood of the present invention can be suitably used when a chemical experiment or the like is performed in a laboratory such as a laboratory or a laboratory.

1: Fume hood 2: Work table 21: Work surface 3: Hood main body 30: Crosspiece member (support member)
31: Support 33: Curtain plate 35: Front opening 37: Lift door 41: Partition top plate 42: Light source 5: Balance weight 91: Ceiling wall 92: Reinforcement member

Claims (5)

A fume hood comprising a workbench installed in a work room and a hood body arranged to cover the work surface of the workbench,
A support member is provided on the top of the hood body,
The fume hood is configured so that the hood body is suspended from the ceiling wall of the work room by fixing the support member to the ceiling wall of the work room. The hood main body is provided with pillars at its four corners,
The fume hood according to claim 1, wherein the support member is fixed to an upper portion of the support column, and the support member is fixed to a reinforcing member provided on a ceiling wall of a work room. Up and down sliding doors are provided at the front opening of the hood body so as to be freely opened and closed.
A curtain is provided above the front opening in the hood body,
The fume hood according to claim 1, wherein a balance weight for balancing the weight of the lift door and holding the lift door in a desired lift position is disposed along the inner surface of the curtain plate. . A partition top is provided above the work surface in the hood body,
The partition top plate is constituted by a transmission plate having light diffusibility, and a light source is disposed above the partition top plate,
The fume hood according to any one of claims 1 to 3, wherein an optical ceiling having a lower surface of the partition top plate as a surface light source is configured by the light source and the partition top plate. A fume hood main body arranged so as to cover a work surface of a work table installed in a work room,
A support member is provided at the top,
A hood main body of a fume hood characterized in that the hood main body itself is suspended from the ceiling wall of the work chamber by fixing the support member to the ceiling wall of the work chamber.

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