JP2010266076A - Toxic substance exhausting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To allow collection from a working table without causing diffusion escape from the working table, and to enhance worker protection performance and diffusion preventive performance. <P>SOLUTION: An intake and exhaust control means is provided to be erected vertically at one side of the working table 2, and to form an L-shape in a side face view together with the working table, the intake and exhaust control means is built in with a first fan 5 for sucking outside air blown out as an air curtain air flow, and a second fan 8 for discharging the outside air sucked into the intake and exhaust control means from a working space on a working face of the working table through an intake port to an outside via a filter, an air curtain air flow injection slit 19 for injecting the air curtain air flow along the working face of the working table is arranged along a side edge of the working table opposed to the intake and exhaust control means, an air curtain air flow injection slit is arranged in the working table to inject the air curtain air flow along a rise-up face of a working face side base of the intake and exhaust control means, and the intake port is opened in an upper part of the rise-up face of the intake and exhaust control means. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention sucks harmful gases generated on the work surface of the work table, particularly harmful substances having a high specific gravity, to the workers working around the work table without staying on the work surface. The present invention relates to a local exhaust device that can be removed from the workbench without causing any trouble.

  When working on a work table in the local exhaust system, the work space is surrounded by the work table, the ceiling is used as a vent, and the clean air blown into the work space is opened from the opening on the front of the work table. A clean bench that flows out of the table is known. (Patent Document 1) This apparatus has a large amount of exhaust air for exhausting air in the work space. In addition, for example, when a gas that adversely affects the human body is generated by the work, a situation occurs in which the worker sucks the gas, which may cause an adverse effect on the surrounding environment.

Japanese Patent No. 3084605

  An object of the present invention is to collect harmful substances generated when working on a workbench without being dissipated from the workbench, and to improve the protection of workers and the prevention of diffusion.

The harmful substance exhaust device of the present invention according to claim 1 is provided with an intake / exhaust control means standing upright on one side of the workbench and exhibiting an L-shape in side view together with the workbench, A first fan that sucks outside air and blows it out as an air curtain air flow; and a second fan that discharges outside air sucked into the intake / exhaust control means from the work space on the work surface of the work table through the air intake through the filter. A fan is installed, an air curtain airflow ejection slit is provided along the side edge of the work bench facing the intake / exhaust control means, and the air curtain airflow is ejected along the work surface of the work bench. An air curtain airflow ejection slit for ejecting an air curtain airflow along the rising surface of the work surface side base of the exhaust control means was disposed on the work table, and an intake port was opened above the rising surface of the intake / exhaust control means.
According to a second aspect of the present invention, there is provided a hazardous substance exhausting apparatus according to the first aspect, wherein side plates are provided on both sides of the rising surface on the work surface side of the intake / exhaust control means, and the rising air curtain air flow, the horizontal air curtain air flow, It encloses the confluence site.

  The device according to the present invention is provided with a horizontal air curtain airflow ejection slit for ejecting an air curtain airflow along the work surface of the work table along the side edge of the work table, so that it stays in the immediate vicinity on the work surface. It is effective in eliminating harmful substances with high specific gravity and reduces the accumulation of harmful substances and other substances on the workbench.

Since the apparatus of the present invention is provided with side plates on both sides of the rising surface on the work surface side of the intake / exhaust control means and surrounds the merged portion of the rising air curtain airflow and the horizontal air curtain airflow, it rises with the combined horizontal air curtain airflow. Even if the air curtain airflow mixes to form a vortex, the mixed airflow does not flow out of the device due to the side plate, protecting the operator and preventing the diffusion of harmful substances to the environment. Can be expected to improve.
In the apparatus according to the present invention, both the rising air flow and the horizontal air curtain air flow are formed in the slit shape, so that the exhaust air flow can be reduced, resulting in an energy saving effect.

The present invention is a right side view of the apparatus with the right side plate removed. The top view of this invention apparatus. The front view of this invention apparatus. A is a cut end view of the horizontal air curtain airflow ejection slit portion of the apparatus of the present invention, and B is a cut end view of the air slit airflow ejection slit portion.

An example of the present invention will be described next with reference to the drawings.
The hazardous substance exhaust device 1 of the present invention comprises a work table 2 and intake / exhaust control means 3 provided in a state of being placed on the work table 2. It is provided to be L-shaped.

  The intake / exhaust control means 3 forms a box that also serves as a duct, and the box is divided into two upper and lower sections, and in the lower first section 4a, for the rising air curtain airflow 5a and the horizontal air curtain described later. A fan 5 for the airflow 5b is provided, and a fan 8 that sucks harmful substances and the like in a work space 6 to be described later and sends sucked gas to the harmful substance adsorption filter 7 is disposed in the second section 4b. The suction gas containing the toxic substance passing through the toxic substance adsorption filter 7 is cleaned and discharged from the exhaust port 9. Reference numeral 10 denotes an air inlet that sucks gas containing harmful substances in the work space 6 into the second box 5b by the operation of the fan 8, and is provided with a louver. The upper section of the second section 4b of the intake / exhaust control means 3 projects to the working space 6 side, and the suction port 10 is located on the inclined surface between the lower section and the upper projecting portion, and a louver is provided.

  That is, the side plates 11 are provided on the left and right side portions of the junction of the rising air curtain airflow 5a and the horizontal air curtain airflow 5b to prevent harmful air from escaping outside the intake / exhaust control means 3. Reference numeral 12 denotes an outside air inlet provided in the first compartment 4a.

  A duct 13 is provided on the lower surface of the work table 2 in connection with the air curtain fan 5 provided in the first section 4 a, and the air pumped by the fan 5 in the first section 4 a is sent to the duct 13. It is done. A horizontal air curtain blowing nozzle body 14 is provided at the end of the duct 13.

  The nozzle body 14 receives air from ducts 13 and 13 provided at the entire lower part of the work table 2, but the slope 15 on the work space 6 side is slightly as shown by the cut end face in FIG. 4A. Inclined and provided with a vent 16 in the slope 15. A vent cover 17 is provided so as to cover the vent 16 with a very small distance (for example, 1 mm) from the slope 15. The vent cover 17 is in close contact with the blowing nozzle body 14 at the upper part, but the slope 15 and the vent cover 17 are opened at a distance from the lower end part, from which the nozzle body 14 is opened. The air inside is ejected along the slope 15 to form a horizontal air curtain air current ejection slit 22. The ejected air hits the surface of the work table 2 and flows on the same surface in the direction of the control means 3 as a horizontal air curtain air flow 5b.

Further, a rising air curtain airflow ejection slit 19 is provided on the upper surface of the duct 13 in contact with the work space side rising surface 18 of the intake / exhaust control means 3. The rising air curtain air flow 5 a ejected from the slit 19 rises along the work space side rising surface 18 of the intake / exhaust control means 3 and is sucked into the intake / exhaust control means 3 from the suction port 10.
20 is an operation switch and 21 is an illumination lamp.

When using the apparatus of the present invention, the apparatus 1 of the present invention is appropriately placed on a table, and the work is performed while standing on the front surface of the work table 2 or hanging on a chair.
By operating the switch 19, the air curtain fan 5 rotates, and outside air outside the apparatus 1 is sucked into the first compartment 4 a from the outside air inlet 12, and into the duct 13 continuing to the first compartment 4 a. Send it out. The outside air sent to the duct 13 is first partially ejected out of the duct 13 by the rising air curtain airflow ejection slit 19 and brought into a vertical state along the work space side rising surface 18 of the intake / exhaust control means 3. And the contaminated air located in the surrounding work space 6 is taken in and sucked by the fan 8 from the intake port 10 into the second compartment 4b of the intake / exhaust control means 3.

  The air that has passed through the rising air curtain airflow ejection slit 19 travels through the duct 13, enters the horizontal air curtain duct 14, passes through the vent 16 as shown in FIG. 4A, and is formed between the slope 15 of the duct 14 and the slit cover 17. The horizontal air curtain air flow ejection slit 21 formed by the gap 15a is ejected along the slope 15 onto the work table 2, and the jet strikes the surface of the work table 2 and flows along the surface of the work table 2 in the horizontal direction. become.

This horizontal air curtain air flow 5b causes harmful substances staying on the work surface of the work table 2 to move on the flow, and together with the rising air curtain air flow 5a generated at the end of the work surface, intake / exhaust control means 3 is sucked.
At the confluence of the horizontal air curtain airflow 5b and the rising air curtain airflow 5a of the work table 2, the side plates 11 are provided on both sides of the work table 2 so as to sandwich the air inlet 10; Even if the horizontal air curtain airflow and the rising air curtain airflow are mixed to form a vortex, the airflow mixed for the side plate 11 does not flow out of the apparatus and is sucked into the suction port 10. Is done.

  The airflow including the harmful substance that has entered the intake / exhaust control means 3 from the suction port 10 is removed by the harmful substance adsorption filter 7 and discharged from the exhaust port 9 to the outside of the apparatus.

DESCRIPTION OF SYMBOLS 1 Toxic substance exhaust apparatus 2 Work table 3 Intake / exhaust control means 4a 1st division
4b 2nd section 5 Fan for air curtain
5a Ascending air curtain airflow 5b Horizontal air curtain airflow 6 Work space 7 Hazardous substance adsorption filter 8 Fan 9 Exhaust port 10 Louver 11 Side plate 12 Outside air intake port 13 Duct 14 Horizontal air curtain duct 15 Slope 16 Ventilation port 17 Slit cover 18 Work space side rising surface 19 Ascending air curtain air current ejection slit 20 Operation switch 21 Illumination lamp 22 Horizontal air curtain air current ejection slit

Claims (2)

  An intake / exhaust control means is provided upright on one side of the work table and having an L shape in side view together with the work table. The intake / exhaust control means includes a first fan that sucks outside air and blows it out as an air curtain air flow, And a second fan for releasing outside air sucked into the intake / exhaust control means from the work space on the work surface of the worktable through the air intake through the filter, and the intake / exhaust control means of the worktable An air curtain airflow ejection slit for ejecting an air curtain airflow along the work surface of the workbench is disposed along the side edge facing the surface, and along the rising surface of the work surface side base of the intake / exhaust control means An exhaust device for harmful substances, wherein an air curtain air flow ejection slit for ejecting an air curtain air flow is arranged on a work table, and an intake port is opened above the rising surface of the intake and exhaust control means.   2. The hazardous substance exhausting apparatus according to claim 1, wherein side plates are provided on both sides of the rising surface on the work surface side of the intake / exhaust control means to surround the confluence of the rising air curtain airflow and the horizontal air curtain airflow.

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