JP2008176961A - Blast type destaticizer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To secure substantial safety of a destaticizer by not only aiming at improvement of maintenance properties by having a front-face fan guard as well as a rear-face fan guard free to be attached or detached, but also by stopping operation of the destaticizer when they are detached, and grounding them when they are attached. <P>SOLUTION: Fan guard retaining parts 23a to 23d retaining a front-face fan guard 10A and a rear-face fan guard 10B each in free detachment on a front face and a rear face of a frame part 4 of the main body 1, and first and second grounding-use contact terminals 24, 25 are provided, and on back sides of the front-face fan guard and the rear-face fan guard, a conductive plate for electrically conducting the first and the second grounding-use contact terminals are attached. A control circuit is provided which can put 'on' a fan-driving circuit and a high-voltage generating circuit, when the first and the second grounding-use contact terminals get conducted with each other to be connected to the ground, and put 'off' the fan-driving circuit and the high-voltage generating circuit, when the first and the second grounding-use contact terminals get non-conductive. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a blower type static eliminator that discharges ions generated by discharge of a discharge electrode by blowing air from a fan.

  This type of static eliminator has a structure in which a fan and a discharge electrode are provided inside a frame portion of a main body installed on a stand, and a net-like front fan guard and a rear fan guard are installed before and after the frame portion of the main body. For example, Japanese Patent Application Laid-Open No. 2006-196380, Japanese Patent Application Laid-Open No. 2005-216539, Japanese Patent Application Laid-Open No. 2005-347270, and the like are known.

Among these, in the thing of patent document 1, although it has enabled it to attach the detachable louver which is a front fan guard detachably to the opening part of the front of a case main body, about safety | security accompanying the attachment or detachment, what is it? There is no consideration.
JP 2006-196380 A JP 2005-216539 A JP 2005-347270 A

  The first problem of the present invention is not only to improve the maintainability by making the front fan guard and the rear fan guard detachable, but when the front fan guard and the rear fan guard are removed, the operation of the static eliminator is performed. It is intended to ensure sufficient safety by stopping and attaching them to the ground when they are installed.

  The second problem is to make it possible to adjust the orientation of the main body (the direction of blowing air) in a multi-step manner with a simple structure, and to prevent the adjustment knob from being lost.

  The present invention provides a fan driven by a fan drive circuit, and a discharge electrode to which a high voltage is applied by a high voltage generation circuit, provided inside the frame portion of the main body, and a net-like front fan guard before and after the frame portion of the main body. A blower type static eliminator that attaches a rear fan guard and sends out ions generated by the discharge of the discharge electrode by blowing air from the fan, wherein the invention according to claim 1 achieves the first object by providing a frame of the main body. A front and rear fan guard holders for detachably holding the front fan guard and the rear fan guard, and first and second contact terminals for grounding are provided respectively. A conductive plate for electrically conducting the first and second ground contact terminals is attached to the back surface, and the first and second ground contact terminals are conducted. When the ground connection is established, the fan drive circuit and the high voltage generation circuit are turned on. When the first and second ground contact terminals are turned off, the fan drive circuit and the high voltage generation circuit are turned off. A circuit is provided.

  The invention according to claim 2 is characterized in that in each of the front fan guard and the rear fan guard, the conductive plate is in electrical continuity with the metal mesh in order to enhance safety.

  In the invention according to claim 3, in order to ensure stability when the front fan guard and the rear fan guard are attached, the first and second ground contact terminals are formed as leaf springs, and stopper holes are provided in at least one of them. The conductive plate of the front fan guard and the rear fan guard is provided with a stopper projection that is detachably fitted into the stopper hole when the front fan guard and the rear fan guard are attached and detached.

  In the invention according to claim 4, in order to facilitate the attachment / detachment of the front fan guard and the rear fan guard, the left and right protrusions having fan guard holding portions on the left and right edges of the front and rear surfaces of the frame portion of the main body, respectively. Edges are formed, and the front and rear fan guards are detachable from the fan guard holding part by sliding the front and rear fan guards up and down along the left and right protruding edges. It is characterized by being.

  In order to achieve the second object, the invention according to claim 5 is provided with a main body side face gear on the left and right side surfaces of the main body and a screw hole at the center thereof, and at the upper ends of the left and right standing parts of the stand, A stand-side face gear that meshes with the gear, and a through hole in the center, and the screw shaft of the adjustment knob is passed through this through hole and screwed into the screw hole. It is characterized by that.

  The invention according to claim 6 is characterized in that a stopper for preventing the adjustment knob from being pulled out from the through hole is provided on the screw shaft of the adjustment knob in order to prevent the adjustment knob from being lost.

  According to the first aspect of the present invention, when the front fan guard and the rear fan guard are attached to the main body, they are grounded, and the fan drive circuit and the high voltage generation circuit can be turned on. Since the fan drive circuit and the high voltage generation circuit are turned off, sufficient safety can be ensured.

  According to the invention which concerns on Claim 2, since the metal mesh of a front fan guard and a rear fan guard can be grounded, safety can be improved.

  According to the invention of claim 3, when each of the front fan guard and the rear fan guard is attached to the main body, the stopper projection provided on the conductive plate on the back surface is provided with the stopper hole provided in the leaf spring-shaped grounding terminal. Thus, the front fan guard and the rear fan guard can be stably attached while maintaining the ease of attaching and detaching.

  According to the invention of claim 4, the front and rear fan guards are slid up and down along the left and right projecting edges to form fan guard holding portions formed on the left and right projecting edges. The front fan guard and the rear fan guard can be easily attached and detached.

  According to the fifth aspect of the present invention, the main body can be installed at an arbitrary angle with respect to the stand by rotating the adjustment knob and tightening the stand-side face gear with the main body-side face gear. The direction can be easily adjusted in multiple stages.

  According to the invention which concerns on Claim 6, since the retaining member was provided in the adjustment knob, loss of the adjustment knob can be prevented.

  Next, embodiments of the present invention will be described in detail with reference to the drawings.

  As shown in FIGS. 1 and 2, the blower type static eliminator is configured such that a box-shaped main body 1 made of resin-made front and rear main body cases 1 a and 1 b is placed between upper ends of left and right standing parts 2 a and 2 b of a stand 2. A pair of left and right adjustment knobs 3A and 3B are detachably mounted, and the angle of the main body 1 can be adjusted in multiple stages by the left and right adjustment knobs 3A and 3B.

  As shown in FIG. 3, the main body 1 includes a frame portion 4 whose front and rear surfaces are opened in an approximately octagonal shape, and a circuit box portion 5 on the lower side thereof by front and rear main body cases 1 a and 1 b. Inside, the motor-equipped fan 6 is held by a plurality of ribs 7, and a plurality of plus / minus pairs of needle-like discharge electrodes 8 are implanted on the substantially octagonal inner peripheral surface of the frame 4, and the circuit box 5 A power supply circuit, a fan drive circuit, a high voltage generation circuit, a control circuit, and the like are incorporated therein.

  On the front and rear surfaces of the frame portion 4, left and right edges 9a and 9b and a lower protrusion 9c are continuously formed integrally with the left and right edges and the lower edge thereof. And on each of the rear surfaces, the front fan guard 10A and the rear fan guard 10B are detachably attached by being fitted between the projecting edge portions 9a, 9b, 9c.

  The front fan guard 10 </ b> A and the rear fan guard 10 </ b> B have exactly the same structure, and a wire mesh 12 is attached in the frame of a resin plate-like frame 11. The outer peripheral shape of the frame 11 is a square having a size that fits between the projecting edges 9 a, 9 b, and 9 c of the main body 1, and the inner peripheral shape is substantially an octagon that matches the substantially octagonal opening of the main body 1. ing.

  As shown in FIG. 4, the metal mesh 12 is formed by stretching a plurality of metal rings 14 having different diameters on a pair of metal support bars 13 a and 13 b bent in a V shape, and each of the pair of metal support bars 13 a and 13 b. Both end portions of the frame body 11 are screwed in the recess 15 on the back surface of the frame body 11. In order to form screw holes to be screwed at four places on the left, right, top, and bottom, ridges 16 projecting in a spherical shape are formed on the front surface at the four corners of the frame 11, and these ridges 16 are formed on the front fan guard 10A. And it functions also as a finger-hanging part when attaching / detaching the rear fan guard 10 </ b> B to the main body 1.

  In addition, the horizontally long conductive plate 17 is screwed to the back surface of the frame body 11 at the same time when screwed on the lower left and right sides of the wire mesh 12. A stopper projection 17a is integrally formed at the center of the conductive plate 17 so as to protrude.

  Further, the upper and lower ends of the left and right edges of the frame 11 lack about half of its thickness, so that the left and right upper and lower small recesses 18a, 18b, 18c and 18d and the remaining left and right upper and lower small Protrusions 19a, 19b, 19c and 19d are formed, and left and right guide recesses 20a and 20b lacking the entire thickness are formed on the left and right edges, respectively, and upper left and right small recesses 18a and 18b, respectively. It is formed continuously. Accordingly, the small concave portions 18a, 18b, 18c, and 18d and the small convex portions 19a, 19b, 19c, and 19d are formed at the four corners on the left, right, and top of the frame body 11 as a whole, and the guide concave portions 20a and 20b are formed on the left and right of the upper side. Will be.

  On the other hand, on each of the front and rear surfaces of the frame portion 4 of the main body 1, left and right upper and lower small convex portions 21 a, 21 b, which partially increase in thickness are formed on the upper and lower ends of the left and right protrusions 9 a, 9 b. The left and right and upper and lower fan guard holding portions 23a, 23b, 23c, and 23d are formed by 21c and 21d and the left and right and upper and lower small recesses 22a, 22b, 22c, and 22d that are formed with their upper ends opened inside thereof. ing.

  Further, in each of the front surface and the rear surface of the frame portion 4 of the main body 1, a leaf spring-shaped first grounding contact terminal 24 made of a metal plate piece is attached to the lower center of the frame portion 4. Alternatively, a leaf spring-like second ground contact terminal 25 made of a metal plate piece is additionally provided at a position distant to the right. The upper end portion of the first ground contact terminal 24 is bent obliquely toward the inside of the frame portion 4, and a stopper hole 26 is provided at the center of the first contact terminal 24. Further, the first ground contact terminal 24 extends downward to the inside of the ground line connection port 27 provided on the outer surface of the circuit box portion 5, and can be grounded to the outside through the ground line connection port 27. ing. The second ground contact terminal 25 is installed in the recess 28 so that the lower end protrudes from the recess 28 formed in the frame 4 and is electrically connected to the circuit in the circuit box 5. Yes.

  As described above, the front side of the main body 1 with respect to the front fan guard 10A and the rear side of the main body 1 with respect to the rear fan guard 10B have the same corresponding structure. In order to attach the guard 10B to the main body 1, as shown in FIG. 5, the left and right guide recesses 20a and 20b of the frame 11 are aligned with the left and right small protrusions 21a and 21b on the main body 1, and the front fan is mounted. As shown in FIG. 6, the guard 10 </ b> A and the rear fan guard 10 </ b> B are slid downward along the left and right protruding edges 9 a and 9 b on the main body 1 side to the protruding edge 9 c on the lower side. At that time, when the ridge 16 is slid down while being put on the finger and pressed, the left, right, up and down small convex portions 19a, 19b, 19c, 19d of the respective frame bodies 11 The recesses 22a, 22b, 22c, and 22d are inserted into the upper ends of the recesses 22a, 22b, 22c, and 22d and engaged with the left and right and upper and lower 21a, 21b, 21c, and 21d on the main body 1 side, and the front fan guard 10A and the rear fan guard 10B Each is held by the left and right and upper and lower fan guard holding portions 23a, 23b, 23c, and 23d on the main body 1 side.

  At this time, in each of the front fan guard 10A and the rear fan guard 10B, the stopper protrusion 17a of the conductive plate 17 is a stopper of the first ground contact terminal 24 on the main body 1 side as shown in FIGS. Since the ground contact terminal 24 is fitted with the hole 26 and the ground contact terminal 24 is shaped like a leaf spring, the fitting is held by the restoring force of the spring. Therefore, the front fan guard 10A and the rear fan guard 10B Inadvertent detachment from the fan guard holding portions 23a, 23b, 23c, and 23d is prevented. Further, as shown in FIG. 9, the conductive plate 17 is pressed against the second ground contact terminal 25 on the main body 1 side by the spring force, and the first ground contact terminal 24 and the second ground contact terminal 24 are connected to each other via the conductive plate 17. The two ground contact terminals 25 are electrically connected.

  On the other hand, in order to remove each of the front fan guard 10A and the rear fan guard 10B from the main body 1, when a finger is placed on the raised portion 16 and lifted so as to slide upward along the left and right protruding edges 9a and 9b, Since the left, right and top small convex portions 19a, 19b, 19c and 19d are disengaged from the left and right top and bottom 21a, 21b, 21c and 21d on the main body 1, the front fan guard 10A and the rear fan guard 10B can be easily attached and detached with one touch. Yes.

  On the substantially octagonal inner peripheral surface of the frame portion 4 of the main body 1, a plurality of plus / minus needle-like discharge electrodes 8 are implanted as described above, and direct current is generated by a high voltage generating circuit in the circuit box portion 5. The high voltage is applied and discharged. Positive and negative ions generated by the discharge are sent forward by the air blown by the fan 6.

Next, the angle adjustment mechanism of the main body 1 by the left and right adjustment knobs 3A and 3B will be described.
Although only the right side is shown on the left and right side surfaces of the main body 1, the left and right main body side face gears 30 are integrally formed in an annular shape, and a screw hole 31 is provided at the center thereof.

  On the other hand, on the left and right upright portions 2a and 2b of the stand 2, a resin gear disc 33 in which the stand-side face gear 32 is formed in an annular shape is formed on the left and right sides, and the upright portions 2a and 2b are connected to the resin gear holder 34. Are fixed to the upper ends of the upright portions 2a and 2b so as to sandwich the upper end portion thereof. The left and right adjustment knobs 3A and 3B have a screw shaft 35 protruding as shown on the right side in FIG. 10, and this screw shaft 35 is passed through the through hole 36 of the gear disc 33 and the gear holder 34. A retaining member (C-shaped retaining washer) 37 fitted to the outer periphery of the screw shaft 35 prevents the through-hole 36 from being pulled out.

  The left and right adjustment knobs 3A and 3B can be removed between the left and right upright portions 2a and 2b of the stand 2 by screwing the screw shafts 35 into the screw holes 31 on the left and right side surfaces of the main body 1, respectively. Further, the angle of the main body 1 can be adjusted in multiple stages by engaging and tightening the main body side face gear 30 and the stand side face gear 32.

Next, an electrical configuration will be described.
When the front fan guard 10A and the rear fan guard 10B are attached to the main body 1, as described above, the first ground contact terminal 24 and the second ground contact terminal 25 on the main body 1 side are respectively provided on the front surface and the rear surface. Is electrically connected through the conductive plate 17 to be grounded. Thereby, the metal mesh 12 of the front fan guard 10A and the rear fan guard 10B is also grounded.

  In this way, when the first ground contact terminal 24 and the second ground contact terminal 25 are electrically connected to both the front surface and the rear surface and are connected to the ground, the power switch 38 is turned on in FIG. Then, the relay 39 is turned on, the contact 39a is closed, the power is supplied from the power supply circuit 40 to the fan drive circuit 41 and the high voltage generation circuit 42, the fan 6 is driven, and the plus / minus discharge electrodes A positive and negative DC high voltage is applied to 8. If the fan 6 is driven, the fan monitor lamp 43 is lit, and if the discharge electrode 8 becomes dirty and the discharge current in the high voltage generation circuit 42 is below the threshold value, the cleaning warning lamp 44 is lit. The power switch 38, the fan monitor lamp 43 and the cleaning warning lamp 44 are arranged on the front surface of the circuit box portion 5 of the main body 1.

  When either the front fan guard 10A or the rear fan guard 10B is removed from the main body 1, the first ground contact terminal 24 and the second ground contact terminal 25 are disconnected and the relay 39 is turned off. Therefore, the power supply to the fan drive circuit 41 and the high voltage generation circuit 42 is interrupted, the fan 6 is stopped, and the high voltage application to the discharge electrode 29 is also stopped.

  Although not shown in the drawing, the voltage applied to the plus / minus discharge electrodes 29 for the fan speed adjustment volume capable of manually adjusting the rotational speed of the fan 6 and the plus / minus ion balance. An ion balance adjustment volume that can be adjusted manually is also provided.

It is a perspective view of the ventilation type static eliminator of one Example of this invention. It is the perspective view which isolate | separated the main body and the stand. It is these perspective views which removed the front fan guard from the main body. It is a rear view of a front fan guard (rear fan guard). It is these perspective views which show the process in which a front fan guard is attached to a main body. It is the same perspective view. It is sectional drawing which shows the relationship between the electrically conductive plate of a front fan guard, and the 1st contact terminal for grounding on the main body side, and is the state before the former stopper protrusion fits into the latter stopper hole. It is sectional drawing of the state which the stopper protrusion fitted in the stopper hole. It is sectional drawing which shows the relationship between the electrically conductive board of a front fan guard, and the 2nd contact terminal for grounding on the main body side. It is sectional drawing of the angle adjustment mechanism of the main body by an adjustment knob. It is a block diagram which shows the outline | summary of an electrical structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body 1a * 1b Main body case 2 Stand 2a * 2b Left and right standing part 3A * 3B Adjustment knob 4 Frame part 5 Circuit box part 6 Fan 7 Rib 8 Discharge electrode 9a * 9b * 9c Projection edge part 10A Front fan guard 10B Rear fan Guard 11 Frame 12 Metal mesh 13a / 13b Metal support rod 14 Metal ring 15 Recess 16 Raised portion 17 Conductive plate 17a Stopper protrusion 18a / 18b / 18c / 18d Small recess 19a / 19b / 19c / 19d Small protrusion 20a / 20b Guide recess 21a, 21b, 21c, 21d Small convex portions 22a, 22b, 22c, 22d Small concave portions 23a, 23b, 23c, 23d Fan guard holding portion 24 First ground contact terminal 25 Second ground contact terminal 26 Stopper hole 27 Ground wire connection port 28 Recess 30 Body side face gear 31 Screw hole 32 Stand side face A 33 gear disc 34 the gear holder 35 screw shaft 36 through hole 37 retaining member 38 power switch 39a contacts 40 power supply circuit 41 fan drive circuit 42 high-voltage generation circuit 43 fan monitor lamp 44 Cleaning warning lamp

Claims (6)

  A fan driven by a fan drive circuit and a discharge electrode to which a high voltage is applied by a high voltage generation circuit are provided inside the frame part of the main body, and a net-like front fan guard and a rear fan guard are provided before and after the frame part of the main body. In the blow type static eliminator that sends out the ions generated by the discharge of the discharge electrode by blowing with a fan, a fan that detachably holds the front fan guard and the rear fan guard on the front and rear surfaces of the frame part of the main body, respectively. A guard plate and first and second ground contact terminals are provided, respectively, and conductive plates electrically connecting the first and second ground contact terminals to the rear surfaces of the front fan guard and the rear fan guard. In addition, when the first and second ground contact terminals become conductive and are connected to ground, the fan drive circuit and A high-voltage generating circuit can be turned on, and a fan driving circuit and a control circuit that turns off the high-voltage generating circuit when the first and second ground contact terminals become non-conductive are provided. Type static eliminator.   2. The blower type static eliminator according to claim 1, wherein in each of the front fan guard and the rear fan guard, the conductive plate is electrically connected to the wire mesh.   The first and second grounding contact terminals are formed as leaf springs, and stopper holes are provided in at least one of them, and the stopper holes are formed on the conductive plates of the front fan guard and the rear fan guard as the front fan guard and rear fan guard are attached and detached. The blower type static eliminator according to claim 1 or 2, further comprising a stopper protrusion that is detachably fitted to the air.   Left and right protruding edges having fan guard holding portions are formed on the front and rear surfaces of the frame portion of the main body, and the front fan guard and the rear fan guard slide up and down along these left and right protruding edges. The blower type static eliminator according to claim 1, 2 or 3, wherein the front fan guard and the rear fan guard are detachable by fitting with the fan guard holding portion.   A body side face gear is provided on the left and right side surfaces of the body, and a screw hole is provided at the center thereof. A stand side face gear that meshes with the body side face gear is provided at the upper ends of the left and right standing parts of the stand, and a through hole is provided at the center thereof. 5. The main body is installed between the right and left standing parts of the stand by passing the screw shaft of the adjustment knob through the through hole and screwing into the screw hole. Blast type static eliminator.   6. The blower type static eliminator according to claim 5, wherein a retaining member for preventing removal from the through hole is provided on a screw shaft of the adjustment knob.

Images