JP2006019154A - Static eliminator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a static eliminator which suppresses generation of dust and prevents deterioration of working environment. <P>SOLUTION: The static eliminator comprises a desk and a no-wind type static eliminator (with no fan). The no-wind type static eliminator is installed at one of the end part, inside, and the upper part of the desk. The non-wind type static eliminator can be moved between the working position and the retreating position and furthermore, has an opening and closing lid for switching over the radiation direction of ions emitted from the no-wind type static eliminator. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a static eliminator, and more particularly to a static eliminator that uses a windless static eliminator in association with a work desk.

  A conventional windless static eliminator without a fan (referred to as a windless static eliminator) has a short ion flight distance of 200 to 300 mm and has a low static elimination effect unless placed near the work.

  However, as shown in FIG. 6, it is difficult to place a static eliminator at a close distance because a work area moves a workpiece (not shown) in and out and changes its direction. For example, the space above the work desk (work desk or simply desk) requires a space of 1,200 mm, and the work desk has a depth of 700 mm. The static eliminator could not be placed.

  For this reason, in order to sprinkle ions from outside a large work space (work area), it is necessary to increase the flight distance of ions, and the type of static eliminators 12 and 14 that carry ions with a fan are used. A fan-type static eliminator 12 is placed on the desk 10 or a static eliminator 14 is suspended at the top of the work area. As indicated by arrows, ions are sent from outside the work area by a fan with wind.

  However, when the wind was sent by a fan, there was a problem that the dust was rolled up and the clean environment was destroyed. Recently, the use of clean environments such as clean rooms and clean benches has been used to suppress the occurrence of defects due to dust, so it is basically impossible to send wind with a fan, but it is unavoidably used. Therefore, there are many defective products, and the yield cannot be improved.

  Further, since the static eliminator generates ozone, it may smell and make the worker 16 feel uncomfortable. Since ions are allowed to fall from the front or upper side of the worker 16, ozone is also applied to the worker's face, causing deterioration of the working environment.

  Since foreign matters are radiated from the discharge needles of the static eliminators 12 and 14, the workpiece is soiled. Since ions are carried on the wind from the front or above the workpiece, foreign objects are also carried at the same time. As a result, defects due to contamination are inevitable. Thus, at present, there are many problems, and no good method for static elimination has been found.

Since a static eliminator using wind basically destroys a clean environment, a windless static eliminator is used in the present invention. However, since there is too much distance to deliver ions to the work with a windless static eliminator from outside the large work area, a windless static eliminator is installed inside or near the table top so that ions can be Is applied to the workpiece. The method has several forms as follows.
1) Install a windless static eliminator at the edge of the top in front of the desk.
2) Install a windless static eliminator inside the top plate between the worker and the workpiece.
3) Install a windless static eliminator on the top of the desk.
4) Place a low profile windless static eliminator on the top of the table at the back of the desk.

  INDUSTRIAL APPLICABILITY The present invention can prevent contamination of a work and can improve the working environment for workers.

  The static eliminator of the present invention includes a desk and a windless static eliminator mounted on the desk.

  FIG. 1 is a diagram illustrating a static eliminator according to Embodiment 1 of the present invention. The static eliminator of Embodiment 1 incorporates a windless static eliminator (sometimes simply referred to as a static eliminator) at the end of the top plate in front of the desk. As shown in FIG. 1a, when not in use (stored), the static eliminator 20 is in a retracted position on the extension of the top of the desk, and at this time, the power of the static eliminator is turned off (off). Is not emitted.

  As shown in FIG. 1b, when in use (when taken out), the static eliminator 20 is rotated from the retracted position to the working position, and brought to a position where the ions 18 emitted from the static eliminator 20 are directed above the desk. . At this time, the power source of the static eliminator is turned on (ON) and ions are emitted.

  FIG. 1c shows the actual usage situation. In FIG. 1c, since the chest of the worker 16 is vacant, the static eliminator 20 is placed there. Actually, in the clean bench, the down flow 22 or the horizontal flow is blown from the front, so that the ions 18 are radiated from the downwind to the upwind.

  Since the wind of a clean bench etc. is a weak wind of about 0.3 m / sec, there is no problem as long as the ions 18 are returned slightly. Also, because it radiates from the leeward, by-product ozone is also radiated (although the coulomb repulsive force works away on ions), but the coulomb repulsive force does not work on ozone, so it is almost swept away by the wind and the operator's face Not reach. In other words, the work environment does not deteriorate because it does not smell.

  Further, foreign matter radiated from the discharge needle (not shown in FIG. 1c) of the static eliminator 20 does not act on the repulsive force of Coulomb like ozone, so it is almost swept away by the wind and does not reach the workpiece. Therefore, the defect by the foreign material radiation from the discharge needle does not occur. You may provide a grating | lattice in the front surface so that the worker 16 and the workpiece | work 50 may not touch the static eliminator 20 at the time of taking out.

  2 and 3 are an enlarged perspective view and an enlarged sectional view of the static eliminator. 2 and 3, the static eliminator 20 has a static eliminator main body 23, and an ion generator 24 that generates and emits ions is disposed so as to be rotatable about a rotation shaft 26. For this reason, as shown in FIG. 3, the ion generator 24 of the static eliminator 20 has a working position in which the discharge needle 32 faces obliquely upward and a retreat position in which the discharge needle 32 faces in the horizontal direction (position shown in FIG. 2). It is movable between. For convenience of explanation, the movement of the ion generator 24 of the static eliminator 20 may be simply referred to as the movement of the static eliminator.

  As shown in FIG. 3, a limit switch 30 is provided in the static eliminator, and this limit switch 30 controls on / off of the power source of the static eliminator 20 when the ion generator 24 of the static eliminator rotates. That is, the power is turned on when rotating from the retracted position to the working position, and the power is turned off when rotating from the working position to the retracted position. Of course, a switch for turning on / off the power of the static eliminator may be provided together with this limit switch or instead of this limit switch.

  FIG. 4 is a diagram illustrating a static eliminator according to Embodiment 2 of the present invention. As shown in FIG. 4, in Example 2, the static eliminator 20 is incorporated in the top plate of the desk 10 between an operator (not shown) and a workpiece (not shown). Ions 18 are radiated from the static eliminator 20 so that they are placed between a work (not shown) and an operator (not shown) to counter the downflow or horizontal flow wind (not shown). As shown in FIG. 4a, when not in use, the ion emission direction of the static eliminator 20 is covered by the open / close lid 34, the power of the static eliminator 20 is turned off, and no ions are emitted. On the other hand, as shown in FIG. 4b, the opening / closing lid is opened and ions are emitted during use. It should be covered with a grounded grid so that workers and workpieces cannot be touched.

  In this case, the ions are more likely to reach because the distance from the workpiece is even closer. The problem of ozone and the foreign matter emission problem of the discharge needle are solved in the same manner as in the first embodiment. Moreover, you may provide the limit switch which controls on / off of a static elimination device with opening and closing of an opening-and-closing lid.

  In Example 2, the static eliminator is built in the top of the desk between the work and the worker, but in Example 3, the static eliminator was built in the top of the desk. (Not shown). That is, the static eliminator is incorporated in front of the workpiece. Since the structure of the static eliminator and the attachment to the desk are the same as in the first embodiment or the second embodiment, detailed description thereof is omitted. Also in this case, since the ion radiation direction follows the down flow or the horizontal flow, it is the same as the first and second embodiments except that the ion flight distance is long.

  In Example 4, a low-profile static eliminator was placed on the top plate at the back of the desk (not shown). The method of placing a low-profile static eliminator on the top of the desk at the back of the desk may interfere with the fact that the face is slightly above the desk, but it is often not a problem. Since the radiation direction of the ions follows the down flow or the horizontal flow, it is the same as in Examples 1 and 2 except that the distance of ions is long.

  FIG. 5 is a diagram showing a static eliminator of Embodiment 5 of the present invention. In Example 5, it can be said that the desk itself is a static eliminator. For example, a bar-type static eliminator 20 is incorporated in the desk 10. In this static eliminator, there is no problem with the distance traveled by the ions 18. In addition, there is no problem because ozone is swept away by the down flow or horizontal flow and does not reach the operator's face. The foreign matter emitted by the discharge needle is radiating upward from inside the desk and is not pushed out by the downflow or horizontal flow.

It is a figure which shows the static elimination apparatus of Example 1 of this invention. It is an expansion perspective view of the static eliminator of Example 1. FIG. 1 is an enlarged cross-sectional view of Example 1. FIG. 6 is a diagram illustrating a static eliminator of Example 2. FIG. 10 is a diagram illustrating a static eliminator of Example 5. FIG. It is a figure which shows the static elimination apparatus of a prior art example.

Explanation of symbols

10 Desk 20 Static eliminator 24 Ion generator 26 Rotating shaft 30 Limit switch 32 Discharge needle 34 Opening / closing lid

Claims (8)

  A static eliminator comprising a desk and a windless static eliminator mounted on the desk.   The static eliminator according to claim 1, wherein the windless static eliminator is attached to any one of an end, an inside, and an upper surface of the desk.   The static eliminator according to claim 1, wherein the windless static eliminator is movable between a work position and a retracted position.   2. The static eliminator according to claim 1, further comprising an open / close lid that opens and closes a radiation direction of ions emitted from the windless static eliminator.   5. The static eliminator according to claim 4, further comprising a grid-like cover disposed at an emission port of ions radiated from the windless static eliminator. 6.   5. The static eliminator according to claim 3, wherein the windless static eliminator is turned on / off when the windless static eliminator moves between a working position and a retracted position, or when the opening / closing lid moves. The static eliminator further comprising on / off switching means for performing switching.   A static eliminator comprising: a desk; a windless static eliminator mounted inside the desk; and a grid-like cover disposed at an ion emission port of the windless static eliminator.   8. The static eliminator according to claim 5, wherein the grid-like cover is grounded.