JP2006313029A - Draft chamber - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simply detachably attach a fixture for attaching a supporting frame of laboratory ware without conducting specific work to a baffle plate and using an additional fixing means. <P>SOLUTION: A plurality of baffle plate attaching members 8 are attached forward in front of a back plate 5, a male screw shaft 25a projecting from a plurality of front and rear direction facing fixtures 25 for attaching the supporting frame for supporting laboratory ware is inserted into the baffle plate and screwed in a female screw hole 8a of the baffle plate attaching member 8, the baffle plate 6 is attached to the baffle plate attaching member 8, and the fixture 25 is detachably attached in the front of the baffle plate 6. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a draft chamber used in a chemical laboratory. In particular, an attachment for attaching a support frame for supporting a laboratory instrument can be easily attached to a baffle plate inside the chamber body as being detachable. The draft chamber.

Draft chambers used in chemical laboratories and the like are used to discharge odors and harmful gases generated by various chemical experiments to the outside of the laboratory to maintain a good working environment. An exhaust passage is formed between the back plate and a baffle plate standing in front of the back plate via a spacer, and the chamber body is operated by an exhaust port provided above the exhaust passage and an exhaust duct connected thereto. In general, the air in the space is forcibly discharged to the outside (see, for example, Patent Documents 1 and 2).
Japanese Patent Laid-Open No. 10-43612 (FIG. 3) JP 2002-219368 A (FIGS. 4 and 5)

  In the draft chamber as described in the above-mentioned Patent Documents 1 and 2, for example, a horizontal bed and a vertical wall are arranged in a lattice shape to support a laboratory instrument such as a flask or beaker into which chemicals are placed inside the chamber body. An assembled support frame called Star Chief may be attached.

  At this time, the support frame is often fixed to the inner surfaces of both side plates of the chamber main body and a plurality of fixtures attached in advance to the front surface of the baffle plate. It becomes an obstacle.

  In addition, since it is necessary to process the mounting holes for mounting the fixture and to prepare other fixing means such as mounting screws, the number of processing steps and parts increases, and when the fixture is removed, Since the mounting holes are exposed, the appearance is also deteriorated.

  The present invention has been made in view of the above-described problems, and can be used to attach and detach the mounting tool for attaching the support frame of the laboratory instrument without performing special processing on the baffle plate or using a dedicated fixing means. It is an object of the present invention to provide a draft chamber that can be easily attached and prevents the attachment from obstructing work or preventing the attachment holes and the like from being exposed to deteriorate the appearance. .

According to the present invention, the above problem is solved as follows.
(1) In the draft chamber in which a baffle plate is attached to the front surface of the back plate of the chamber body so that an exhaust passage in the vertical direction is formed between the opposing surfaces of the baffle plate and the back plate. A plurality of baffle plate mounting members are forwardly mounted on the front surface of each of the baffle plate, and any one of facing ends of the baffle plate mounting members and a plurality of front-facing mounting tools for mounting a support frame for supporting a laboratory instrument. The baffle plate is attached to the baffle plate mounting member by screwing the male screw shaft, which is also provided on the other side, into the screw to be provided on one side and threaded through the through hole provided in the baffle plate, and this baffle plate A fixture is detachably attached to the front of the plate.

(2) In the above item (1), the baffle plate mounting member is provided with a female screw hole penetrating in the front-rear direction, and a through hole in which a bolt shorter than that is provided in the back plate is provided at the rear of the female screw hole. Then, the baffle plate mounting member is fixed to the front surface of the back plate by screwing from behind, and a male screw shaft protruding from the rear end of the mounting tool is screwed into the front portion of the female screw hole.

(3) In the above item (1) or (2), a cylindrical spacer longer than that is fitted to the baffle plate mounting member, and the front and rear end surfaces thereof are connected to the rear surface of the baffle plate and the front surface of the back plate. The baffle plate and the fixture are fixed via the cylindrical spacer.

(4) In a draft chamber in which a baffle plate is attached to the front surface of the back plate of the chamber body so that a vertical exhaust passage is formed between the opposing surfaces, a plurality of A baffle plate mounting bolt is projected forward, a spacer is fitted to the baffle plate mounting bolt, and a support for supporting the experimental instrument from the front of the baffle plate whose rear surface is in contact with the front end of the spacer. The baffle plate is mounted by the baffle plate mounting bolt and the spacer by screwing a screw to be provided at the rear end portion of the plurality of frame mounting fixtures facing in the front-rear direction to the front end portion of the baffle plate mounting bolt. A mounting tool is detachably attached to the front surface of the baffle plate.

(5) In any one of the above items (1) to (4), the baffle plate is composed of a lower baffle plate and an upper baffle plate, and a support member that supports the lower end of the upper baffle plate is attached to the lower Secure to the top front of the baffle plate.

(6) In the above item (1), the plurality of support members are mounted separately in the left-right direction, and a concave groove facing in the left-right direction is provided on the upper surface of the front end portion, and the lower end of the upper baffle plate is formed by this concave groove. To support.

According to the first aspect of the present invention, the support frame mounting fixture for supporting the laboratory instrument is mounted using the baffle plate mounting member for mounting the baffle plate. There is no need to perform a special process for attaching or to use another fixing means, and the number of processing steps and the number of parts can be reduced.
In addition, when the fixture is not needed, it can be easily removed, so that it does not interfere with the work in the chamber body, and instead of removing the fixture, other bolts and nuts can be attached to the baffle plate. By screwing into the mounting member, the baffle plate can be mounted with good appearance without exposing the mounting hole.

According to the second aspect of the present invention, the baffle plate mounting member can be fixed to the back plate or the baffle plate mounting member by using the front and rear portions of the female screw holes penetrating in the front-rear direction provided in the baffle plate mounting member. It is possible to easily perform the mounting operation of the mounting tool to the.
In addition, an inexpensive high nut or the like can be used for the baffle plate mounting member.

  According to the invention described in claim 3, since the front and rear ends of the cylindrical spacer are pressed against the baffle plate and the back plate in a wide area, the baffle plate is stably supported and the fixture is also stably attached. It is done.

According to the invention described in claim 4, since the fixture is mounted using the baffle plate mounting bolt and the spacer fitted thereto, the same effect as that of the invention described in claim 1 can be obtained.
Moreover, since it is only necessary to screw the female thread of the fixture onto the baffle plate mounting bolt protruding from the front surface of the back plate, the attachment and detachment work of the fixture becomes extremely easy.

  According to the fifth aspect of the present invention, since the support member that supports the lower end of the upper baffle plate can also be fixed to the front surface of the lower baffle plate using a fixture, processing and fixing means for attaching the support member are unnecessary. Become.

  According to the sixth aspect of the present invention, the lower end of the upper baffle can be easily supported by the recessed grooves on the upper surfaces of the plurality of support members so as to be detachable, and there is a gap between the lower baffle plate and the upper baffle plate. As a result, the air in the chamber body can flow into the exhaust passage through the gap.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of a draft chamber to which the first embodiment of the present invention is applied. A chamber body (1) is composed of a lower article storage section (2) and an upper working section (3). A transparent opening / closing door (4) made of glass, an acrylic plate or the like is provided at the front opening of the working unit (3) so as to be movable up and down.

  In the rear part of the working space in the working part (3), a vertical lower baffle plate (6) and an upper baffle plate (7) inclined obliquely upward in front of the rear plate (5) are provided. It is installed as follows.

  As shown in FIG. 2, at the upper and lower ends of the front surface located in the working section (3) of the back plate (5), for example, a plurality of left and right (in the embodiment, a hexagonal high nut, etc.) Three baffle plate mounting members (8) are inserted into the female screw holes (8a) penetrating in the front-rear direction through the through holes (9) of the back plate (5) from the rear, and the baffle plate mounting members (8) By fixing a shorter bolt (10), it is fixed side by side vertically and horizontally.

  A cylindrical spacer (11) slightly longer than that is loosely fitted to each baffle plate mounting member (8), and the rear surface of the lower baffle plate (6) abuts the front end of each cylindrical spacer (11). In the contacted state, the upper end of the lower baffle plate (6) is connected to the upper end of the lower baffle plate (6) with a long fixing screw (13) inserted from the front into the lower support member (12) for supporting the upper baffle plate (7). And the cylindrical spacer (11) together with the lower support member (12) by screwing it into the female screw hole (8a) at the front of the baffle plate mounting member (8). And is supported by the back plate (5).

  At the lower end of the lower baffle plate (6), a plate-shaped fixing screw (13) inserted through a plate seat (15) from the front of the lower through hole (14) is inserted into the baffle plate mounting member (8). ) Is screwed into the female screw hole (8a) and is supported by the back plate (5) via the cylindrical spacer (11).

After the lower baffle plate (6) is attached, a ventilation gap (17) is formed between the lower end thereof and the upper surface of the bottom plate (16) of the working portion (3).
(18) is a blindfold cap fitted to the plate seat (15).

  The lower end of the upper baffle plate (7) is supported by a left and right recessed groove (19) formed on the upper surface of the front end portion of the three lower support members (12), and the upper end is also the same. The upper support member (21) fixed to the lower surface of the central portion in the left-right direction of the upper surface plate (20) of the chamber body (1) is located obliquely behind and below the upper support member (21) fixed to the front of the lower support member (12). The groove is supported by being fitted into an open concave groove (22).

  The depth of the upper groove (22) is greater than the depth of the lower groove (19). After fitting the upper end of the upper baffle plate (7) into the upper groove (22) first, The lower end of the groove (19) can be attached by dropping the lower end.

  When the lower baffle plate (6) and the upper baffle plate (7) are attached in this way, an exhaust passage (23) directed in the vertical direction is formed between the rear surface of these and the front surface of the rear plate (5). The air in the working space in the working part (3) flows into the exhaust passage (23) through the gap (17), and the exhaust pipe (24) provided on the upper surface plate (20) and the exhaust duct connected thereto. It is discharged to the outside through (not shown).

  The upper baffle plate (7) is supported by the lower support member (12) slightly in front of the lower baffle plate (6), and a gap is formed between the baffle plates (6) and (7). Therefore, the air in the upper layer of the work space also flows into the exhaust passage (23) from the gap and is discharged to the outside.

  In the draft chamber having such a configuration, a fixture for attaching a support frame for supporting a laboratory instrument such as a flask or beaker into which chemicals are placed is fixed to the front surface of the lower baffle plate (6). Do as follows.

  While removing the six fixing screws (13) fixing the lower baffle plate (6) one by one, instead of the fixing screws (13), it is attached to the rear end of the rod-shaped fixture (25) facing in the front-rear direction. The small-diameter male screw shaft (25a) projecting integrally is screwed into the front part of the female screw hole (8a) of each baffle plate mounting member (8) from the front.

  The screw shaft (25a) of the upper fixture (25) is longer than the screw shaft (25a) of the lower fixture (25) by the length of the upper mounting member (12). .

  As a result, the attachment of the lower baffle plate (6) to the baffle plate mounting member (8) and the attachment of the fixture (25) to the front surface of the lower baffle plate (6) are performed simultaneously and one baffle plate is attached. This can be done easily using the member (8). The lower support member (12) can also be fixed to the front surface of the lower baffle plate (6) by the upper fixture (25).

  As shown by a two-dot chain line, a lattice-shaped support frame (26) for supporting a laboratory instrument composed of vertical and horizontal ridges can be attached to each fixture (25) using an appropriate clamp. .

  FIG. 5 shows the main part of the second embodiment of the present invention. Contrary to the above embodiment, a screw is used instead of the female screw hole (8a) at the front end of the baffle plate mounting member (8). A shaft (27) is projected, and the threaded shaft (27) is formed through the through hole (14) of the lower baffle plate (6) through the male screw shaft (27) and formed at the rear end of the fixture (25). Is screwed onto the protruding end of the male screw shaft (27).

  Also in the second embodiment, as in the first embodiment, the lower baffle plate (6) is attached to the baffle plate attaching member (8) and the fixture (25) is attached to the lower baffle plate (6). Can be installed at the same time.

  FIG. 5 shows the attachment portion of the fixture (25) to the lower part of the lower baffle plate (6), but the upper part has a male screw shaft (for the front and rear dimensions of the lower support member (12)). 27) should be long.

  When the fixture (25) is not required, the lower baffle plate (6) can be fixed in good appearance by screwing a cap nut or the like into the protruding portion of the male screw shaft (27).

  FIG. 6 shows the main part of the third embodiment of the present invention. As shown in FIG. 6 (a), the rear surface of the metal reinforcing member (29) fixed to the rear surface of the back plate (5). Next, a nut (30) is welded, and a long baffle plate mounting bolt (31) screwed into the nut (30) from the rear is inserted through the back plate (5) and protruded to the protruding portion. The lower baffle plate (6) is brought into contact with the front end of the fitted cylindrical spacer (11), and the female screw (33a) of the decorative nut (33) inserted from the front into the through hole (32) is attached to the baffle plate. The lower baffle plate (6) is attached to the back plate (5) by screwing into the front end of the bolt (31).

  As shown in FIG. 6 (b), the decorative nut (32) is removed and the small diameter portion (25b) protruding from the rear end of the fixture (25) is inserted into the through hole (32) of the lower baffle plate (6). If the screw (34) is screwed into the baffle plate mounting bolt (31) to be inserted into the small diameter portion (25b), the lower baffle plate (6) and the fixture (25) are Each can be easily attached to the baffle plate attachment member (8) and the lower baffle plate (6).

  In this embodiment, only the baffle plate mounting bolt (31) and the cylindrical spacer (11) can fix the lower baffle plate (6) and the fixture (25). (30) may be omitted.

  Further, the baffle plate mounting bolt (31) is projected forward of the lower baffle plate (6), and a female screw (28) at the rear of the fixture (25) as shown in FIG. May be.

  In the first and second embodiments shown in FIGS. 1 to 5, the support area of the lower baffle plate (6) is widened, and the baffle plate is attached in order to stably attach it to the back plate (5). A cylindrical spacer (11) having a diameter larger than that of the member (8) is used, but the rear surface of the lower baffle plate (6) is brought into contact with the front end of the baffle plate mounting member (8), and the baffle plate mounting member ( 8) If the female screw hole (8a) or male screw shaft (27) of the 8) and the female screw shaft (25a) or female screw (28) of the fixture (25) are screwed together, the cylindrical spacer (11 ) Can be omitted.

  The present invention can also be applied to a draft chamber including an integrally structured baffle plate in which an inclined upper baffle plate (7) is connected to a lower baffle plate (6).

It is a partially cutaway perspective view of the draft chamber to which the first embodiment of the present invention is applied. It is the II-II line expansion vertical side view of FIG. It is a vertical side view of the same site | part as FIG. 2 when a fixture is attached to a baffle board. It is a partially cutaway perspective view of the draft chamber in a state where a support frame is attached to the fixture. It is a vertical side view of the principal part which shows the 2nd Embodiment of this invention. It is a vertical side view of the principal part which shows the 3rd Embodiment of this invention.

Explanation of symbols

(1) Chamber body
(2) Goods storage section
(3) Working department
(4) Open / close door
(5) Back plate
(6) Lower baffle plate
(7) Upper baffle plate
(8) Baffle plate mounting member
(8a) Female thread hole
(9) Through hole
(10) Bolt
(11) Cylindrical spacer
(12) Lower support member
(13) Fixing screw
(14) Through hole
(15) Plate seat
(16) Bottom plate
(17) Clearance
(18) Cap
(19) Groove
(20) Top plate
(21) Upper support member
(22) Groove
(23) Exhaust passage
(24) Exhaust tube
(25) Mounting tool
(25a) Male screw shaft
(25b) Small diameter part
(26) Support frame
(27) Male screw shaft
(28) Female thread
(29) Reinforcing member
(30) Nut
(31) Baffle plate mounting bolt
(32) Through hole
(33) Cosmetic nut
(33a) Female thread
(34) Female thread

Claims (6)

  In a draft chamber in which a baffle plate is attached to the front surface of the back plate of the chamber body so that a vertical exhaust passage is formed between opposing surfaces of the baffle plate and the back plate. A plurality of baffle plate mounting members are mounted forward, and are provided at either one of opposing ends of the baffle plate mounting member and a plurality of front-facing mounting fixtures for mounting a support frame for supporting a laboratory instrument. For this purpose, a male screw shaft, which is also provided on the other side of the screw, is inserted into a through hole provided in the baffle plate and screwed to attach the baffle plate to the baffle plate mounting member. In addition, a draft chamber characterized in that the fixture is detachably attached.   The baffle plate mounting member is provided with a female screw hole penetrating in the front-rear direction, and a bolt shorter than that is screwed into the rear part of the female screw hole from the rear through a through hole provided in the back plate, 2. The draft chamber according to claim 1, wherein a baffle plate mounting member is fixed to the front surface of the rear plate, and a male screw shaft protruding from a rear end of the mounting tool is screwed into a front portion of the female screw hole.   A cylindrical spacer that is longer than that is fitted to the baffle plate mounting member, and the front and rear end surfaces thereof are pressed against the rear surface of the baffle plate and the front surface of the back plate, thereby allowing the baffle to pass through the cylindrical spacer. The draft chamber according to claim 1 or 2, wherein the plate and the fixture are fixed.   In a draft chamber in which a baffle plate is mounted on the front surface of the back plate of the chamber body so that a vertical exhaust passage is formed between the opposing surfaces, a plurality of baffle plates are mounted on the front surface of the back plate. For mounting the support frame for supporting the experimental instrument from the front of the baffle plate with the bolt projecting forward and the baffle plate mounting bolt fitted with a spacer and the rear surface abutting the front end of the spacer The baffle plate is supported by the baffle plate mounting bolt and the spacer by screwing a screw for providing at the rear end portion of the plurality of fixtures facing in the front-rear direction to the front end portion of the baffle plate mounting bolt, A draft chamber characterized in that a fixture is detachably attached to the front surface of the baffle plate.   The baffle plate is composed of a lower baffle plate and an upper baffle plate, and a support member that supports the lower end of the upper baffle plate is fixed to the upper front portion of the lower baffle plate by a fixture. A draft chamber according to any one of the above. 6. A draft according to claim 5, wherein a plurality of support members are mounted apart in the left-right direction, and a concave groove facing in the left-right direction is provided on the upper surface of the front end portion, and the lower end of the upper baffle plate is supported by the concave groove. Chamber.

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