JP2007014830A - Draft chamber in sections - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a draft chamber in sections the knocked-down parts of which can be assembled and used, when required, near an existing laboratory instrument on a top plate of a laboratory table or at another place, which has absolute minimum functions though it has a simple structure and is inexpensive and can be used even in comparatively safe laboratory work in which the use of the draft chamber is not obligated up to now. <P>SOLUTION: A side frame body 6 having a square side view is arranged on both sides. Four corners of one of side frame bodies are connected detachably to those of the other of side frame bodies by using upper connection bars 7 and lower connection bars to form a frame 1. A decorative frame body 9 having a square side view is fit detachably to the outside of the side frame body while interposing a side plate 10 between them to form a side panel 2. A rear panel 3 to be opened by a blast from the internal treatment space is arranged in the space to be formed by the rear end of one of side frame bodies, that of the other of side frame bodies, the upper connection bar and the lower connection bar. An opening/closing door panel 4 is arranged in the space to be formed by the front end of one of side frame bodies, that of the other of side frame bodies, the upper connection bar and the lower connection bar. A top cover 5 is placed and connected detachably onto the upper surface of the frame. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an assembly-type draft chamber, and more particularly to a simple assembly-type draft chamber that can be installed on a top plate such as an experimental bench or other place by a knock-down method.

  Conventionally, Patent Document 1 is provided with a pedestal, a pair of side panels, a rear panel provided with an exhaust passage on the inner surface, a ceiling panel provided with an exhaust port, an upper front sash provided with an observation door, and an inspection door. It has a draft body assembled by combining the lower front sash with each other, and a workbench disposed inside the draft body, and the worktable is detachably supported on the inner surfaces of the side panel and the rear panel. A work table support section is provided, and a pipe is disposed inside the side panel and the rear panel, and each panel adjacent to each other is provided at an edge of one panel from the inside of the draft body. A draft chamber that is connected by a connecting device comprising a hook that can be rotated and a pin that is provided at an edge of the other panel and that is detachably engaged with the hook. There has been disclosed.

  Further, in Patent Document 2, a rear panel is erected by fitting an unevenness between the back of the upper surface of the lower base and the lower surface of the rear panel, and the side panel is engaged with hook pieces and locking holes on both sides of the rear panel. Side panels are erected on both sides of the lower base, and a ceiling panel having a fitting portion that can be fitted to the upper ends of the rear panel and the both side panels is fitted to the upper part of the rear panel and the both side panels. There is disclosed a draft chamber assembled by screwing a fitting portion of a ceiling panel from a horizontal direction.

These draft chambers have a structure in which a dedicated base is integrally provided at the lower part and can be used independently. In particular, what is disclosed in Patent Document 1 is a full-scale draft chamber in which a work table having a water faucet, a gas cock, and a sink is provided.
Japanese Examined Patent Publication No. 6-16857 (FIGS. 1 and 2) JP-A-9-173873 (FIGS. 1 to 13)

  Therefore, in view of the above-mentioned situation, the present invention intends to solve the problem by simply assembling around the existing laboratory equipment in a knock-down manner on a top board such as an experimental table or other places when necessary. It is possible to use it for a relatively safe experiment of the kind that has never been obliged to use, with the minimum necessary functions despite its simple structure and low cost. It is the point which provides the assembly-type draft chamber which is possible.

  In order to solve the above-mentioned problem, the present invention provides an existing experimental instrument in which side frames having a square shape in a side view are arranged on both sides, and the four corners of both side frames are detachably connected with an upper connecting rod and a lower connecting rod. A frame is formed so as to surround the side frame, a side face plate is sandwiched on the outer side of the side frame body, and a side frame is removably attached to form a side body, and the upper side between the rear ends of the both side frames is formed. On both sides forming a frame, a back body is detachably provided between the connecting rod and the lower connecting rod, an open / close door is provided between the upper connecting rod and the lower connecting rod between the front ends of the both side frames. An assembly-type draft chamber in which a canopy is placed on the upper surface of the frame body and the upper surfaces of the front and rear upper connecting rods and is detachably connected is formed.

  Here, the side body includes a decorative frame body having a rectangular shape in a side view and fitted to the side frame body, and a side plate smaller than the outer shape of the side frame body, and stands on the lower surface plate of the side frame body. An engaging hole formed in a bent piece on the lower edge of the decorative frame body is dropped into the engaging claw formed and engaged, and the upper decorative plate of the decorative frame body overlapped with the upper surface plate of the side frame body is screwed. And the peripheral edge of the side plate is sandwiched between the contact surface of the side frame and the pressing surface of the decorative frame (claim 2).

  The back body has a suspension member fixed to the lower surface of the upper connecting rod of the frame, and at least a pair of left and right hooks formed on the back surface side of the hanging plate of the suspension member. It is preferable that the horizontally long slit hole formed on the upper plate is locked and the lower edge of the back plate is positioned so as to overlap the back side of the upright plate of the stopper member fixed to the upper surface of the lower connecting rod. (Claim 3).

  Further, the open / close door body is configured to support a plurality of sliding doors made of meshed glass or shatterproof film-attached glass with upper and lower rail members fixed to the upper and lower connecting rods so as to be able to be drawn. Preferred (claim 4).

  In the assembled draft chamber of the invention according to claim 1 as described above, a side frame having a square shape in side view is arranged on both sides of an existing experimental instrument, and the four corners of the both side frames are connected to the upper connection rod and the lower connection. A frame is formed so as to surround the existing laboratory instrument by removably connecting with the scissors, and the side body, the rear body, the open / close door body and the canopy are sequentially connected to the frame and assembled. Thus, a simple draft chamber can be easily provided around it. Therefore, since the experimental chambers that did not use the draft chamber can be assembled and used around the experimental device by post-installation, even if gas or droplets are generated from the experimental device, they will not leak into the room. is there. In addition, although it is an assembly type, it can secure the required strength, and the side body is constructed by sandwiching the side plate with the decorative frame body using the side frame body of the frame, improving the appearance. In addition, the minimum airtightness can be ensured.

  According to claim 2, because the side plate is sandwiched and held between the retaining surface of the side frame body of the frame and the pressing surface of the decorative frame body, it can be easily assembled, but has excellent appearance. Moreover, the minimum holding strength of the side plate can be secured.

  According to the third aspect, in the normal use state in which the inside of the processing space is exhausted, the inside of the processing space is in a decompressed state. In addition, even if an unexpected explosion occurs inside the processing space, the back plate is only suspended, so it is opened backward by the blast, The blast can easily escape to the rear, thereby ensuring the safety of the worker on the front side.

  According to the fourth aspect, since the opening / closing door body is made of a sliding door made of glass, the inside of the processing space can be looked into in a normal use state, and the sliding door is made of netted glass or glass with a shatterproof film. Even if the glass is broken by the blast, it will not scatter.

  Next, the present invention will be described in more detail based on the embodiments shown in the accompanying drawings. 1 to 3 show a use state in which the assembly type draft chamber A according to the present invention is installed on the top plate of the experimental table B, and FIGS. 4 to 9 show the structure of the assembly type draft chamber A. Reference numeral 1 denotes a frame, 2 denotes a side body, 3 denotes a back body, 4 denotes an opening / closing door body, and 5 denotes a canopy.

  The assembled draft chamber A according to the present invention, after assembling the frame 1 on a top plate such as a test bench, sequentially attaches the side bodies 2, 2, the back body 3 and the opening / closing door body 4 to the frame 1, A canopy 5 is attached to form a box shape. The installation location of the assembly type draft chamber A according to the present invention is not limited to the top plate such as an experimental table, but it does not block the bottom surface, so that it is required to be placed on a flat plane portion. In the assembly type draft chamber A according to the present invention, the side frames 6 and 6 are arranged on both sides of the existing experimental instrument, and the four corners of the side frames 6 and 6 are connected to the upper connecting rods 7 and 7. A frame 1 is formed so as to be detachably connected with the lower connecting rods 8 and 8 so as to surround an existing experimental instrument, and the side bodies 2 and 2, the back body 3, the opening / closing door body 4 and the canopy 5 are sequentially formed on the frame 1. Are assembled and connected. Therefore, it is possible to provide the assembly-type draft chamber A by post-installation while leaving the experimental instrument as it is around the existing experimental instrument.

  Here, as shown in FIGS. 4 to 6, the frame 1 has side frame bodies 6, 6 that are square in side view on both sides, and upper connecting rods 7, 7 between the four corners of the side frame bodies 6, 6. And the lower connecting rods 8 and 8 are detachably connected. The side body 2 has a side plate 10 made of a transparent synthetic resin sandwiched between a side face frame 6 and a decorative frame body 9 having a quadrangular side view, and the side face body 6 can be attached to and detached from the side frame body 6. Concatenated. The back body 3 is configured by detachably attaching a single or a plurality of back plates 11 made of a transparent synthetic resin between an upper connecting rod 7 and a lower connecting rod 8 behind the frame 1. Further, the open / close door body 4 is configured by providing a plurality of transparent tempered glass sliding doors 12... Between the upper connecting rod 7 and the lower connecting rod 8 in front of the frame 1 so that they can be drawn. Yes. The canopy 5 is three-dimensionally formed by joining an integrally molded product or a plate material made of a transparent synthetic resin, and the upper surfaces of the both side frames 6 and 6 of the frame 1 and the front and rear upper connecting rods 7. , 7 are detachably connected.

  More specifically, the side frame 6 of the frame 1 has a structure in which upper and lower horizontal frames 14 and 14 are connected to upper and lower ends of both vertical frames 13 and 13, and an upper end portion on the inner surface side of the vertical frame 13 Locking holes 15 and 15 for screwing and connecting the upper connecting rod 7 are formed, and through holes 16 and 16 for screwing the lower connecting rod 8 are formed at the lower end portion, and the vertical frame 13 and the outer surface of the horizontal frame 14 are flush with each other, and a stop surface 17 is formed around the upper surface frame 18, and an upper surface plate 18 extends outward from the upper horizontal frame 14, and the lower horizontal frame 14 also has a lower surface plate. 19 is extended outward. And the latching claws 20,... Are erected on both side portions and the central edge portion of the lower surface plate 19 of the side frame body 6, and the upper surface plate 18 is provided with a lower portion for screwing the decorative frame body 9 on the upper surface plate 18. Holes 21 are formed. The upper connecting rod 7 is a rectangular pipe-like long member having a square cross section, and is screwed into the upper and lower portions of the fixing plate 22 fixed to the end face corresponding to the locking holes 15, 15 of the side frame 6. 23 and 23 are screwed together. Actually, the screw 23 is screwed into a nut fixed to the back surface of the fixing plate 22. The lower connecting rod 8 is also a rectangular pipe-like long member having a square cross section, and similarly, a fixing plate 24 is fixed to the end surface, and the fixing plate 24 corresponds to the through holes 16 and 16 of the side frame 6. Thus, the screw holes 25 are formed.

  Here, the locking holes 15, 15 formed in the vertical frame 13 of the side frame body 6 can be locked by inserting the heads of the screws 23, 23 of the upper connecting rod 7 from the side and dropping it downward. Specifically, the upper large hole and the lower small hole are continuously formed. Then, in a state where the side frame body 6 is raised and the screws 23, 23 of the upper connecting rod 7 are loosened, the screws 23, 23 are moved from the side to the locking holes 15 of the side frame body 6. , 15 and dropping and engaging, the screws 23, 23 are tightened to connect the upper connecting rods 7, 7 to the front and rear ends of the upper end of the side frame 6. Then, the lower connecting rods 8 are arranged at the front and rear ends of the other end portions of the both side frames 6 and 6, and screws 26 and 26 are inserted into the through holes 16 and 16 from the outer side. It connects by screwing in the screw holes 25 and 25 of an edge part. Thereby, the inner corners of the both side frames 6 and 6 are connected by the upper connecting rods 7 and 7 and the lower connecting rods 8 and 8 to constitute the frame 1.

  Next, the structure of the said side body 2 is demonstrated based on FIGS. The decorative frame body 9 is a quadrilateral member having the same external shape as the side frame body 6, and has side decorative plates 27 and 27 and an upper decorative plate 28 that cover the side frame body 6 on both sides and the upper side. And a retaining surface 29 that is flush with the inner periphery of the inner frame and further receives the locking claws 20,... .. Are formed, and through holes 32 are formed in the upper decorative plate 28 so as to correspond to the lower holes 21 formed in the upper surface plate 18 of the side frame 6. In addition, the side plate 10 is positioned outside the side frame 6 and has a size such that the other three side edges can abut against the abutment surface 17 with the lower end placed on the bottom plate 19. It is made of a resin plate having high strength such as polyvinyl chloride resin (PVC) and excellent chemical resistance.

  Then, in a state where the side plate 10 is positioned outside the side frame body 6, the engagement holes 31,... Of the bent pieces 30 formed in the lower end portion of the decorative frame body 9 are connected to the side frame body 6. Are engaged with engaging claws 20 formed on the edge of the lower face plate 19, and the side frame 6 is covered with the side decorative plates 27, 27 and the upper decorative plate 28. The overlapping portion of the upper surface plate 18 of the side frame 6 is connected by screwing screws 33 inserted through the through holes 32,. In this state, both side edges and upper edge of the side plate 10 are held from the outside by the pressing surface 29 of the decorative frame body 9, and the edge of the side plate 10 is held by the contact surface 17 of the side frame body 6. The part is held from inside and outside. In addition, a cap 34 that can be opened and closed is provided at the lower rear corner of the side plate 10 so that an insertion hole for wiring and piping to an instrument to be used inside can be provided. In addition, since the periphery of the side plate 10 is not completely fixed, when an unexpected explosion occurs in the processing space, the blast is usually released from the back body 3, but still cannot catch up, It is also possible that a large impact force acts on the side plate 10 from the inside of the processing space, and the side plate 10 is deformed to escape the blast to a relatively safe side.

  Next, the structure of the back body 3 will be described with reference to FIGS. A suspension member 35 having an L-shaped cross section is fixed to the lower surface of the upper connecting rod 7 at the rear of the frame 1, and at least a pair of left and right hooks 37 are formed on the back side of the hanging plate 36 of the suspension member 35. At the same time, a stopper member 38 having an L-shaped cross section is fixed to the upper surface of the rear lower connecting rod 8, and the rising plate 39 of the stopper member 38 is opposed to the hanging plate 36 of the suspension member 35. Then, horizontally long slit holes 40 and 40 for engaging with the hooks 37 and 37 are formed on both sides of the upper edge of the back plate 11, and the lower edge is an upright plate 39 of the stopper member 38. It is made of a resin plate having a vertical dimension that overlaps with the above, a high strength such as polyvinyl chloride resin (PVC), and excellent chemical resistance. In the present embodiment, the back body 3 is constituted by a suspension support member 35 and a stopper member 38 provided on the top and bottom, and two left and right back plates 11, 11. Here, the two back plates 11 and 11 have a width dimension that can be disposed in close contact between the rear vertical frames 13 and 13 of the side frame bodies 6 and 6 of the frame 1. Instead of locking the horizontally long slit hole of the back plate 11 to the hook 37 of the support member 35, the upper end portion of the back plate 11 is attached to the support member 35 or the upper connecting rod 7 with a flexible connecting member. You may connect. As described above, the back body 3 engages the slits 40, 40 of the back plate 11 with the hooks 37,... Of the suspension support member 35 provided on the upper connecting rod 7, and the lower end portion of the back plate 11. Is moved by the upright plate 39 of the locking member 38 provided in the lower connecting rod 8, and the rearward movement of the lower end portion of the back plate 11 is free. Even if it occurs, the back plate 11 is opened by the blast from the inside of the processing space, so that the blast can be released from the back body 3 to the rear, so it is safe because it does not harm the workers on the front side. is there.

  As shown in FIGS. 4, 7, and 9, the opening / closing door body 4 includes three sliding doors 12,... Between the upper connecting rod 7 and the lower connecting rod 8 in front of the frame 1. In this structure, the upper rail member 41 and the lower rail member 42 are supported between the front vertical frames 13 and 13 of the side frame bodies 6 and 6 so as to be able to be pulled apart. The upper rail member 41 and the lower rail member 42 are made of synthetic resin or aluminum, and are made of extruded material. The upper rail member 41 is formed with three rows of concave grooves 43... Are formed with three rows of ridges 44, corresponding to the concave grooves 43,. Here, the depth of the concave groove 43 of the upper rail member 41 is set sufficiently deep to allow upward displacement when the sliding door 12 is mounted, as will be described later. The upper rail member 41 is held inside a holding member 46 having a substantially U-shaped cross section fixed to the lower surface of the upper connecting rod 7. On the other hand, the lower rail member 42 is directly fixed to the upper surface of the lower connecting rod 8 by an appropriate means such as adhesion. Further, the sliding door 12 has a metal lower frame 48 fitted on the lower edge portion of the tempered glass 47 made of meshed glass or glass with anti-scattering film, etc. While receiving the protrusion 44 of the rail member 42, it rolls on the protrusion 44 with the roller 50 incorporated. Further, the upper edge portion of the sliding door 12 is received in the concave groove 43 of the upper rail member 41.

  The canopy 5 is made of a synthetic resin having a high strength such as polyvinyl chloride resin (PVC) and excellent in chemical resistance. As shown in FIGS. 4, 7, 8, and 9, the canopy 5 is opened downward. A flange having a trapezoidal box shape in side view and a size capable of mounting the periphery on the upper surface of the frame 1 in a plan view and joined to the upper surfaces of the upper and lower upper connecting rods 7 and 7 at the front and rear edges. While forming the parts 51 and 51, the duct connection part 52 is provided in the top part. Then, the front and rear flange portions 51, 51 of the canopy 5 are placed on the upper surfaces of the upper connection rods 7, 7 of the frame 1, and screws 54,... Inserted through attachment holes 53,. Are screwed and attached to screw holes 55 formed on the upper surface of the upper connecting rod 7. In the present embodiment, the canopy 5 is an example of an integrally molded product made of synthetic resin.

  When the assembly-type draft chamber A according to the present invention is installed on the top plate of the experimental table B, a processing space surrounded by the top plate and the side bodies 2 and 2, the back body 3, the open / close door body 4 and the canopy 5 is formed. It is formed and exhausted through a duct (not shown) connected to a duct connecting portion 52 provided on the canopy 5. The assembly-type draft chamber A according to the present invention is a simple type and does not require complete airtightness for the purpose of use. When an experiment is performed in a processing space while exhausting the inside, gas such as odor is generated. It is enough if it does not leak outside.

  In the present embodiment, as the back body 3, the upper end of the back plate 11 is suspended on the back side of the hanging plate 36 of the suspension support member 35, and the lower end is positioned on the back side of the upright plate 39 of the stopper member 38. Therefore, when the inside of the processing space is evacuated, the inside is depressurized, and the back plate 11 contacts the hanging plate 36 and the upright plate 39 to ensure the minimum airtightness. On the other hand, when an explosion occurs inside the processing space, the back plate 11 is blown rearward by the blast and opened to prevent the pressure inside the processing space from rising rapidly. The opening / closing door body 4 on the side can be prevented from being destroyed, and the worker on the front side can be protected.

  FIG. 10 shows another usage pattern of the assembly-type draft chamber A according to the present invention. In this form of use, a small chamber 56 is arranged inside the processing space, a duct hose 57 penetrating the canopy 5 is connected to the chamber 56, and the inside is evacuated for experiments. In this case, the assembly-type draft chamber A according to the present invention mainly serves to prevent scattering of fragments and chemicals when exploded.

It is a front view of the assembly-type draft chamber which concerns on this invention. It is a back view similarly. Similarly, it is a right side view. It is a disassembled perspective view of the assembly-type draft chamber which concerns on this invention. It is a disassembled perspective view which shows the structure of a flame | frame and a side body. It is an expansion disassembled perspective view which similarly shows the structure of a frame and a side body. It is a partial exploded perspective view which shows the state in the middle of an assembly. The left half shows a longitudinal front view, and the right half shows a longitudinal rear view. It is a vertical side view. It is a front view of the assembly-type draft chamber which shows another usage pattern.

Explanation of symbols

A Assembling type draft chamber B Laboratory table 1 Frame 2 Side body 3 Rear body 4 Opening and closing door body 5 Canopy 6 Side frame body 7 Upper connection rod 8 Lower connection rod 9 Cosmetic frame body 10 Side plate 11 Back plate 12 Sliding door 13 Vertical frame 14 Horizontal frame 15 Locking hole 16 Through hole 17 Stopping surface 18 Upper surface plate 19 Lower surface plate 20 Engaging claw 21 Lower hole 22 Fixing plate 23 Screw 24 Fixing plate 25 Screw hole 26 Screw 27 Horizontal decorative plate 28 Upper decorative plate 29 Pressing surface 30 Bending piece 31 Engagement hole 32 Through hole 33 Screw 34 Cap 35 Suspension support member 36 Hanging plate 37 Hook 38 Stopping member 39 Standing plate 40 Slit hole 41 Upper rail member 42 Lower rail member 43 Concave groove 44 Projection 46 Holding member 47 Tempered glass 48 Lower frame 49 Downward groove 50 Roller 51 Flange 52 Duct connection 53 Mounting hole 54 Screw 55 Screw hole 56 Chamber 57 Duct hose

Claims (4)

  A side frame having a square shape in a side view is arranged on both sides, and a frame is formed so as to surround an existing laboratory instrument by detachably connecting the four corners of both side frames with an upper connecting rod and a lower connecting rod. A side frame is formed by detachably attaching a side frame to the outer side of the body to form a side body, and a back body is formed between the upper and lower connection rods between the rear ends of the both side frame bodies. Are provided detachably, an open / close door is provided between the upper connecting rod and the lower connecting rod between the front ends of the both side frames, and the upper surfaces of the both side frames forming the frame and the upper surfaces of the front and rear upper connecting rods A prefabricated draft chamber characterized in that a canopy is placed on the top and the detachable connection.   The side body includes a decorative frame body having a rectangular shape in a side view and fitted to the side frame body, and a side surface plate smaller than the outer shape of the side frame body, and the side body is erected on the lower surface plate of the side frame body. The engaging hole formed in the bent piece on the lower edge of the decorative frame body is dropped into the pawl and engaged, and the upper decorative plate of the decorative frame body overlapped with the upper surface plate of the side frame body is screwed, The assembly type draft chamber according to claim 1, wherein a peripheral edge portion of the side plate is sandwiched between a retaining surface of the side frame body and a pressing surface of the decorative frame body.   The back body has a suspension member fixed to the lower surface of the upper connection rod of the frame, and is formed on at least a pair of left and right hooks formed on the back side of the hanging plate of the suspension member at the upper edge of the back plate. 3. The horizontally elongated slit hole is locked, and the lower edge portion of the back plate is positioned so as to overlap the back side of the upright plate of the stopper member fixed to the upper surface of the lower connecting rod. The assembled draft chamber as described. The open / close door body is configured to support a plurality of sliding doors made of netted glass or glass with a shatterproof film attached so as to be able to be pulled by an upper and lower rail member fixed to an upper connecting rod and a lower connecting rod. 3. The assembly type draft chamber according to any one of 3 above.

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