JPH0320686Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a local exhaust hood for personal work performed on a table.

(Prior art) Article 16 of the Lead Poisoning Prevention Ordinance stipulates that ``When an employer engages workers in work with lead listed in Article 1, Item 5, in an indoor workshop, A local exhaust system or general ventilation system must be installed in the workplace where work is performed.
It is stipulated that

A local exhaust ventilation system for soldering work performed on a table collects the lead gas generated during soldering work in a hood to prevent the lead in the solder from turning into steam and filling the work environment. A facility that uses ducts and exhaust fans to release air to the outside is called a local exhaust system. The advantages of this local exhaust system are:
After all, it has to do with the local waste food. This topical hood is used by workers throughout the day, so it must be easy to use and have good performance. Also, since there are many female workers who work on assembling light electrical parts, etc., the hood itself is not very sturdy.
It should not be a thing. Therefore, the smartness of the hood is also an important design element.

Although this is an important local waste hood, unfortunately there is no one that can meet the above requirements.

(Problems to be Solved by the Invention) In view of the problems of the prior art, it is an object of the present invention to provide a table-top station exhaust hood which is superior in terms of station exhaust efficiency and has a structure that is easy to work with.

(Means for Solving the Problems) The device consists of a hexahedron consisting of a transparent front plate, a back plate, parallel side plates, a top plate and a bottom plate each having an outlet, and an internal airflow dispersion plate, and the front plate is The airflow dispersion plate is inclined rearward at a receding angle α, has an opening in the center, and is removable at the four corners, and the air flow dispersion plate is inclined forward at an angle β between the rear edge of the bottom plate and the top plate, It is characterized by a large number of holes arranged throughout the entire surface for uniform airflow.

(Function) Gas generated by soldering work or the like on the bottom plate is sucked in uniformly over the entire surface by the holes 9 of the air flow distribution plate 8, and is discharged from the rear of the air flow distribution plate 8 through the exhaust duct 10 of the top plate 6. At this time, the front plate is a transparent plate,
Since it can be replaced with one that has an opening suitable for the worker, the work part can be sufficiently checked and work can be done safely and accurately.

(Example) FIG. 1 shows a state in which light electrical parts are assembled using the local exhaust hood according to the present invention. 1 is a local waste hood. The station waste hood 1 is constructed of a hexahedron, and the front plate 2 is tilted forward at a receding angle α when viewed from the operator, as shown in FIG. 2, so that the working field of view can be expanded. And the sweepback angle α
is determined by selecting the most effective angle depending on the height of the work table T or chair C. The back plate 3 and both side plates 4, 4 stand perpendicularly to the top surface of the table T. The bottom plate 5 and the top plate 6 are parallel to the table surface.

The front plate 2 is preferably made of a transparent resin material through which internal operations can be seen, and has an opening 7 in the center. As shown in FIGS. 3a, b, and c, the openings of the front plate 2 are prepared in several shapes to suit the type of work and operator's preferences, and are secured with thumbscrews 2a at the four corners. It is removable.

Reference numeral 8 denotes an airflow dispersion plate, which is obliquely provided between the rear edge of the bottom plate 5 and the vicinity of the front edge of the top plate 6 in a forward slope, and has a large number of holes 9 bored in the dispersion plate. These holes 9 exhaust the generated gas through an exhaust duct 10 provided at the center of the top, and are designed to disperse the airflow suction force and equalize the outgoing airflow velocity. For this reason, the size of the hole diameter of the hole 9, the pitch of the hole 9, the shape of the hole such as ellipse, perfect circle, square, etc., the installation angle β of the dispersion plate
Depending on the type of work or worker,
Since each requires a delicate design that is suitable for each, we are now able to meet these demands.

Returning to FIG. 1, reference numeral 11 denotes a flexible hose made of vinyl chloride, for example, which is connected to the exhaust duct 10, and is connected to the fan via a metal duct 12.

FIG. 5 shows an example of local exhaust equipment for soldering work using a large number of local exhaust hoods 1. Each station exhaust hood 1
is suctioned from the duct 13 via the indoor subline 14 by the exhaust fan 15 and discharged. 16 is a damper provided in each local exhaust hood.

(Effects) 1 The front plate is transparent and can be replaced with a front plate that has an opening that suits the work and the worker.
Ensuring safe and accurate work.

2. Due to the large number of holes provided in the air flow distribution plate, the gas generated from the working area flows out backwards uniformly, providing a clean working environment without stagnation.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a soldering operation using a local waste hood. Figure 2 is also a side view. Figures 3a, b, and c show examples of front plates prepared for replacement. FIG. 4 is a perspective view of the local exhaust hood mainly showing the configuration of the airflow dispersion plate. FIG. 5 shows a local exhaust system with multiple local exhaust hoods. In the figure: 1... Station hood, 2... Front plate, 3... Back plate, 4... Side plate, 5... Bottom plate,
6... Top plate, 7... Opening, 8... Air flow dispersion plate,
9... Hole, 10... Exhaust duct, 11... Hose, 12... Metal duct, 13... Duct, 14
...Indoor subline, 15...Exhaust fan, 16...
damper.

Claims (1)

[Scope of utility model registration request] Transparent front plate 2 and back plate 3, both side plates 4, 4 parallel to each other, and a top plate 6 and a bottom plate 5 provided with an outlet 10.
The front plate 2 is inclined backward at a receding angle α, has an opening 7 in the center, and is removable at the four corners. A dispersion hood for table work, characterized in that the dispersion plate 8 is inclined forwardly at an angle β between the rear edge of the bottom plate and the top plate, and a large number of holes 9 for equalizing airflow are arranged on the entire surface.