JP2005040743A - Shredder with static electricity reducing function - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress lowering of shredding performance and soiling in the circumference of a form scrap box at the time of recovering the form scrap or the like by efficiently reducing static electricity generated at the time of shredding forms for a long period of time in a shredder. <P>SOLUTION: The shredder is equipped with a main body section, a shredding section for shredding the form and a shredded scrap housing box which receives and houses the form shredded at the shredding section. In this shredder, a cation generator for generating cations is provided at the main body section and the cation generator irradiates the form shredded at the shredding section with cations by utilizing potential difference between potential of a discharge electrode for generating cations and charging potential of the form shredded at the shredding section. Thereby negative static electricity generated on the form scrap or the like which is easily charged with negative electricity can be efficiently reduced by action of the cations generated from the ion generator. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a shredder that shreds papers that are no longer needed.

  In conventional shredders, when paper is shredded, static electricity is generated due to frictional charging between paper wastes, and paper wastes adhere to the cutters in the product and reduce shredding performance or remove paper wastes. When collecting, the surroundings of the waste paper box inside the shredder are often contaminated, which causes a problem.

  Here, it is known that paper is easily charged negatively, and paper waste actually shredded by a shredder is negatively charged.

  In order to reduce the negative static electricity generated in the paper scrap with respect to the above problem, a structure in which a general static eliminator is installed inside the main body can be considered. The first prior art that can be considered as a static eliminator to be used is that a large amount of positive and negative ions are substantially generated from the tip of each discharge electrode by applying individually generated positive and negative high voltages to the respective positive and negative discharge electrodes. The same amount is generated, and both generated ions are sent out to the inside of the shredder body with a fan, and the negative static electricity of the paper waste is neutralized and reduced by a large amount of both positive and negative ions sent (for example, (See Patent Document 1 and Patent Document 2.)

  As a second conventional technique, by applying positive and negative high voltages alternately to the same discharge electrode, a large amount of both positive and negative ions are generated from the tip of the same discharge electrode, and both generated ions are generated by a fan. In this method, the paper is sent into the shredder body, and the negative static electricity of the paper waste is neutralized and reduced by a large amount of both positive and negative ions sent out.

In addition, as a third conventional technique, there is a hair dryer technique that is used for the human body and aims to perform treatment by discharging negative ions and penetrating into the hair to reduce charge (for example, Patent Document 3). reference.).
In the third prior art, by applying a negative high voltage to the discharge electrode, a stable potential difference is always generated between the discharge electrode and the counter electrode, and a large amount of negative voltage generated by causing a discharge between the two electrodes. A measure is taken to forcibly expose the ions to the hair using a strong wind.

Patent Registration No. 2662606 (Page 4, FIGS. 3 and 5)

Japanese Patent Laid-Open No. 2003-38969 (page 9, FIG. 7)

JP 2002-191426 A (6th page, FIG. 4)

  The present invention has been made in order to solve the problems of the prior arts 1, 2, and 3. The object of the present invention is to prevent negative static electricity generated when shredding papers in a shredder for a long time. It is to reduce the shredding performance and stain around the paper waste box when collecting paper waste and the like by efficiently reducing it.

  As a means for solving the above problem, a structure in which the above-described general static eliminator is installed inside the main body is conceivable. However, the first conventional technique described above is “individually generated positive and negative high voltages. By applying to the positive and negative discharge electrodes, a large amount of both positive and negative ions are generated from the tip of each discharge electrode, and the generated ions are sent into the shredder body by a fan. Therefore, it is necessary to make the amount of positive and negative ions generated from both discharge electrodes substantially the same.

  The concept of the first prior art is that the object is irradiated with a large amount of positive and negative ions generated from the positive and negative discharge electrodes, so that the charged charge amount of the object is an error with respect to the irradiated ion (charge) amount. Neutralizing static elimination to make a small amount.

  However, in the first prior art static eliminator, since the respective discharge states change due to dust or the like adhering to the tips of the positive and negative discharge electrodes during long-term use, the initial amount of positive and negative ions generated is set initially. There is a problem that the balance cannot be maintained and the effect of reducing static electricity is reduced or eliminated.

  In particular, if a static eliminator that generates both positive and negative ions is used for a long period of time, the amount of positive ions generated tends to decrease first compared to the amount of negative ions generated, so it is negatively charged. It is not very suitable as a method to reduce static electricity of paper. In other words, the amount of positive ions generated is necessary to reduce the negative static electricity on paper, but the amount of positive ions generated decreases and the number of negative ions increases relatively over long-term use. This reduces the effect of reducing negative static electricity and further increases the negative static electricity.

  Further, according to the second prior art, “a large amount of both positive and negative ions are generated from the tip of the same discharge electrode by alternately applying positive and negative high voltages to the same discharge electrode, and the generated both ions In order to maintain stable discharge, the counter electrode and a fan for sending ions are sent to prevent the generated positive and negative ions from colliding with each other and disappearing. Thus, there is a problem that the generation amount of both positive and negative ions must be approximately the same. If the counter electrode and the fan are not installed, the amount of negative ions generated becomes extremely large.

  Also in the second prior art, since the amount of positive ions generated first decreases during use, the same problem as in the first prior art occurs.

  In order to solve the above problems, the present invention is not a method of generating both positive and negative ions to the same extent as in the present invention, but only positive ions or positive ions are generated relatively much more than negative ions. A method of reducing negative static electricity generated in the paper waste is effective.

  Further, in the third prior art hair dryer technique, by applying a negative high voltage to the discharge electrode, a stable potential difference is always generated between the discharge electrode and the counter electrode, and a discharge occurs between the two electrodes. This method is used to forcibly expose the hair with a large amount of negative ions generated by the use of strong winds, so the amount of ions exposed to the object is large regardless of the charged potential of the object. There is no problem because it is applied to products that the better the effect is, the more it is, but when used for the purpose of reducing static electricity, if you continue to expose ions with a fan regardless of the charged potential of the object, There is a problem that the electrostatic charge of the object is passed and the electric potential is charged to the opposite potential, which is not very effective.

  As with the first and second prior arts, including the static eliminator, when blowing air with a fan while shredding paper, there is also a problem that paper waste etc. is scattered inside the shredder body due to the wind from the fan. End up.

  In order to solve the above problems, a method of emitting ions according to the potential difference between the potential of the discharge electrode and the charged potential of the object is effective instead of the method of forcibly releasing ions by a fan. It is.

  In order to solve the above problems and achieve the object, according to the invention described in claim 1, the main body, the shredder for shredding paper, and shredding at the shredder In a shredder including a shredded waste storage box for receiving and storing the formed paper, a positive ion generator for generating positive ions is provided in the main body, and the positive ion generator is a potential of a discharge electrode for generating positive ions. And the charged potential of the paper shredded at the shredding portion, positive ions are irradiated onto the paper shredded at the shredding portion.

  This makes it possible to efficiently reduce the negative static electricity generated in paper scraps and the like that are easily charged negatively during shredding by the action of positive ions generated from the positive ion generator.

  According to a second aspect of the present invention, in the shredder according to the first aspect, the irradiation direction of the positive ions is a thickness plane direction with respect to the paper to be shredded by the shredded portion. As a result, positive ions are linearly concentrated and irradiated toward the falling paper scraps that have been shredded at the shredding section, so that negative static electricity generated in the paper scraps can be reduced more efficiently. Made possible.

  According to a third aspect of the invention, in the shredder according to the first or second aspect, the direction of irradiation of the positive ions is in the vicinity of the upper part of the shredded waste container, so that the falling paper is The negative static electricity generated by friction between scraps can be reduced more efficiently during the fall.

  According to a fourth aspect of the present invention, in the shredder according to the first to third aspects, a large amount of static electricity is generated by starting irradiation of the positive ions in conjunction with the start of operation of the shredded portion. It is possible to efficiently reduce the static electricity generated by the negative static electricity generated in the paper scraps during the shredding of the paper and the predetermined time thereafter.

  According to a fifth aspect of the present invention, the shredder according to any one of the first to fourth aspects further comprises a fan for irradiating positive ions to the paper stored in the shredded waste storage box. It is possible to efficiently reduce negative static electricity such as paper waste stored in the storage box.

  According to the invention described in claim 6, in the shredder according to claim 5, by stopping the fan during operation of the shredded portion and operating the fan after the operation of the shredded portion, During the operation of the shredded part, scattering of paper scraps and the like that are falling due to the wind from the fan and frictional charging are suppressed, and after the shredded part has been operated, the fan is operated to generate positive ions. In order to irradiate the paper stored in the shredded waste storage box with positive ions, it is possible to efficiently reduce the negative static electricity generated in the paper waste and the like over a wide range after the operation of the shredded portion. did.

  According to a seventh aspect of the present invention, in the shredder according to the first to sixth aspects, the main body has a humidity sensor that detects external humidity, and the humidity detected by the humidity sensor is adjusted. By controlling the operation of the positive ion generator according to the corresponding signal, the positive ion generator is not operated when the humidity is high and the positive ion generator is operated only when the humidity is low. It is possible to generate static ions in a dry environment that is easy to perform and to reduce static electricity more efficiently.

  According to the present invention, in the shredder comprising a main body, a shredder that shreds the paper, and a shredded waste storage box that receives and stores the paper shredded by the shredder, the main body A positive ion generator that generates positive ions is provided, and the positive ion generator uses the potential difference between the potential of the discharge electrode that generates positive ions and the charging potential of the paper shredded at the shredder, By irradiating the paper that has been shredded by the shredding unit with positive ions, negative static electricity generated in paper scraps and the like that are easily negatively charged is efficiently reduced by the action of positive ions generated from the ion generator. Therefore, there is an effect that the shredding performance is deteriorated and the surrounding dirt when collecting paper waste is suppressed.

  According to a second aspect of the present invention, in the shredder according to the first aspect, the irradiation direction of the positive ions is a thickness plane direction with respect to the paper to be shredded by the shredded portion. By doing so, positive ions are linearly concentrated and irradiated toward the paper scraps that have been shredded and dropped at the shredding portion, so that negative static electricity generated in the paper wastes and the like is more efficiently reduced. effective.

  According to a third aspect of the invention, in the shredder according to the first or second aspect, the direction of irradiation of the positive ions is in the vicinity of the upper part of the shredded waste container, so that the falling paper is There is an effect of reducing negative static electricity generated by friction between scraps more efficiently during dropping.

  According to a fourth aspect of the present invention, in the shredder according to the first to third aspects, a large amount of static electricity is generated by starting the irradiation of the positive ions in conjunction with the start of operation of the shredded portion. There is an effect that the negative static electricity generated in the paper waste or the like is efficiently reduced at the time of shredding and the predetermined time thereafter.

  According to a fifth aspect of the present invention, the shredder according to any one of the first to fourth aspects further comprises a fan for irradiating positive ions to the paper stored in the shredded waste storage box. There is an effect of efficiently reducing negative static electricity such as paper waste stored in the storage box.

  According to the invention described in claim 6, in the shredder according to claim 5, by stopping the fan during operation of the shredded portion and operating the fan after the operation of the shredded portion, During the operation of the shredding part, scattering of paper waste and the like falling due to the wind from the fan and frictional charging are suppressed, and after the operation of the shredding part, the fan is operated to generate positive ions. Effectively reducing negative static electricity generated in paper waste, etc. over a wide range after the operation of the shredded section from the end of operation to irradiate the paper stored in the shredded waste storage box with positive ions There is.

  According to a seventh aspect of the present invention, in the shredder according to the first to sixth aspects, the main body has a humidity sensor that detects external humidity, and the humidity detected by the humidity sensor. By controlling the operation of the positive ion generator with a signal according to the above, the positive ion generator is not operated when the humidity is high and the positive ion generator is operated only when the humidity is low. Positive ions are generated in a dry environment that is easily generated, and negative static electricity generated in paper scraps can be more efficiently reduced.

  As shown in the first embodiment, the positive ion generator A whose output voltage is adjusted to about +4 kV is placed at a position B or a position D (see FIG. 5) between the paper shredder 9 in the shredder 8 and the shredded waste container 10. 5), and a form in which positive ions are intensively irradiated around and inside the falling paper waste 12 and shredded waste storage box 10 is desirable.

  Furthermore, if it is possible to control the fan 7 for positive ion delivery to “stop when paper is shredded and operate after paper shredding” as in the second embodiment, the configuration as in the second embodiment is more desirable. .

  FIG. 1 shows a first embodiment of the shredder of the present invention. In the shredder 8, the paper 11 inserted from above is shredded by a paper shredding section 9 having a rotary blade, and the shredded paper waste 12 is a shredded waste storage box 10 installed below the shredded paper. Fall to and recovered.

  In general, it is found that the paper waste 12 shredded in the shredder is most charged during the fall to the shredder waste storage box 10, and then around and inside the shredder waste storage box 10. ing. The main factor is frictional charging between the falling paper scraps 12.

  In general, since papers are easily charged with negative static electricity, the shredded paper waste 12 is surely charged with negative static electricity.

  Therefore, in the present Example 1, the positive ion generator A shown below is installed in the main body of the shredder 8, and positive ions generated from the positive ion generator A are stored in the falling paper waste 12 and shredded waste. By irradiating the periphery and the inside of the box 10, negative static electricity generated in the shredded paper waste 12 can be reduced.

  FIG. 2 is a schematic view of a positive ion generator A used in the present invention. The positive ion generator A generates a positive high voltage by boosting the input voltage applied between the + input lead 3 and the − input lead 4 with a piezoelectric transformer in the high voltage generator 1. This is a piezoelectric transformer type positive ion generator that generates positive ions at the tip of the discharge electrode 2 by applying the applied positive high voltage to the discharge electrode 2 via the high voltage output line 5.

FIG. 3 is a table showing the electrical characteristics of the positive ion generator A used in the present invention. This positive ion generator A has an output voltage adjusting means, and the output voltage can be varied in the range of +2.5 kV to +7.0 kV. Accordingly, the amount of positive ions generated is 100,000 / cm. It can be varied in the range of ^{3 to} 1 million pieces / cm ³ .

  Here, a high voltage probe HV-P30 made by Iwatatsu was used for output voltage measurement, and an ion tester KST-900 made by Kobe Ion Shokai was used for measuring the amount of positive ions generated.

  In FIG. 4, the schematic of the positive ion generator A attachment part 6 in the shredder of this invention is shown. The positive ion generator mounting portion 6 includes a high voltage generator 1 housing portion 6a and an ion generation air passage 6b, and the discharge electrode 2 is screwed into the ion generation air passage 6b. Positive ions generated from the discharge electrode 2 are irradiated into the shredder 8 main body from the ion outlet 6c.

  Here, the positive ion generator A can be controlled so as to start irradiating positive ions in conjunction with the start of operation of the paper shredding unit 9 and to operate and stop for a predetermined time.

  In addition, an ion delivery fan 7 can be installed in the ion generation air passage 6b, but it is not attached in the first embodiment. The fan 7 also starts to operate in conjunction with the start of operation of the paper shredding unit 9, starts to operate in conjunction with the stop of operation of the paper shredding unit 9, or operates and stops for a predetermined time. Is possible.

  In FIG. 5, the attachment position figure of the positive ion generator A attachment part 6 is shown. The positive ion generator A attachment part 6 can select the position which irradiates a positive ion by selecting four places from B to E. Regarding the height at which the positive ions are irradiated, the position B, the position C, and the position D are near the upper 20 mm of the shredded waste container 10 and the position E is near the lowermost part of the paper shredder 9. With respect to the direction of irradiating positive ions on the same height plane, position B irradiates positive ions perpendicular to the thickness surface of the paper 11, and position C irradiates positive ions perpendicular to the plane of the paper 11. The position D is a position where positive ions are applied to the sheet 11 obliquely from the side of the sheet thickness. When the A4 sheet is shredded, the shortest distance between the position B and the A4 sheet is 50 mm, the longest distance is 260 mm, the shortest distance between the position C and the A4 sheet is 100 mm, and the longest distance is 145 mm.

  FIG. 6 shows the relationship between the attachment position of the positive ion generator A attachment portion 6 and the static electricity reduction effect. In this test, new A4 copy paper was forcibly dried with a dryer so that static electricity was likely to be generated. The charging potential of the paper waste 12 at the charging potential measuring point M which is the uppermost part of the sheet is measured by a method of measuring with an electrostatic potentiometer. Here, the positive ion generator A has an output voltage set to +4.0 kV, starts operating in conjunction with the start of operation of the paper shredding unit 9, and continuously operates during measurement. The time on the horizontal axis of the graph is displayed as 0 seconds immediately after the paper shredding unit 9 stops operating.

  This result shows that the static electricity reduction effect is obtained at any of positions B, C, D, and E as compared to “no ion generation (for comparison)”. It can be seen that the reduction effect is large.

  Position B and position D reduce the static electricity because they irradiate positive ions in a concentrated manner using the potential difference between the positive potential of the discharge electrode 2 and the negative potential of the falling paper waste 12. The effect is large, and conversely, the position C is considered to be slightly small because a wide range of positive ions are irradiated in a fan shape.

  Further, the position E concentrates the positive ions near the paper shredding portion 9 and irradiates the positive ions, and the position B concentrates near the upper portion of the shredded waste container 10 and irradiates the positive ions. However, from a comparison between the two, even when positive ions are irradiated in the vicinity of the paper shredding portion 9, the paper waste 12 falls thereafter and frictional charging between the paper wastes 12 occurs, so that the upper portion of the shredder waste storage box 10 It is considered that a larger effect can be obtained by irradiating the vicinity with positive ions.

  As for the position B, the present result is the vicinity of the upper part of the shredded waste storage box 10 and the positive ion generator A mounting portion 6 is attached to the upper 20 mm position of the shredded waste storage box 10. It has been confirmed that the effect is obtained.

  Next, FIG. 7 shows the relationship between the output voltage of the positive ion generator A and the static electricity reducing effect. This test was carried out in the same manner as the test described above, and the positive ion generator A mounting portion 6 was set at position B in FIG. 5 where the static electricity reduction effect was most obtained.

  The test was performed under four conditions: “positive ion generation (output voltage setting: three conditions of +3.1 kV, +4.0 kV, +6.6 kV)” and “no ion generation (for comparison)”.

  As seen from this result, when no ions are generated, the sheet shredding unit 9 is charged at −12 kV immediately after the operation is stopped (0 seconds), and remains charged at −7 kV even after 60 seconds. When ions are generated, the charging potential immediately after the setting of the output voltage as low as +3.1 kV is reduced to about −4 kV, and after 30 seconds, it is lower than −2 kV in any output voltage setting. It turns out that the static electricity reduction effect is acquired.

  Further, when the output voltage is set to +4.0 kV and +6.6 kV, since there is almost no difference in the static electricity reduction effect, the output voltage setting of about +4.0 kV is sufficient.

  FIG. 8 shows a second embodiment of the shredder of the present invention. The second embodiment has a structure in which an ion sending fan 7 is mounted in the ion generation air passage 6b of the positive ion generator A mounting portion 6 of the first embodiment. The output voltage of the positive ion generator A was set to +4.0 kV.

  In the shredder according to the second embodiment, the sheet shredding unit 9, the positive ion generator A, and the fan 7 are all independently controlled ON / OFF.

  FIG. 9 shows a control time chart of the paper shredding unit 9, the positive ion generator A, and the fan 7 according to the second embodiment. When the paper 11 is inserted from the top of the shredder 8, the paper shredding unit 9 operates to start shredding, and at the same time the positive ion generator A starts to operate, but the fan 7 does not operate. This time is the start of paper shredding.

  Subsequently, 5 seconds after there is no paper to be shredded, the paper shredding unit 9 stops operating, and the fan 7 starts operating. This time is when the paper shredding is completed.

  Finally, the fan 7 and the positive ion generator A are stopped after 60 seconds from the completion of the paper shredding. This time is when the static electricity reduction operation is completed. The positive ion generator A operates continuously from the start of paper shredding.

  FIG. 10 shows the static electricity reduction test result according to the second embodiment. This test was performed in the same manner as the test of Example 1. In the test, in addition to the condition that the fan 7 as shown in the time chart 9 of FIG. 9 of the second embodiment is “stopped at the time of paper shredding and operated after paper shredding”, the fan 7 is “always operated” The test was conducted under three conditions including two conditions for “always stop”.

  Looking at this result, the static reduction effect is obtained in all three conditions. However, when comparing the case where the fan 7 is “always operated” and “always stopped”, it can be seen that the respective charging potentials immediately after are slightly different between −4 kV and −2.3 kV. This is considered to be due to the wind blown from the fan 7 and the static electricity is increased by frictional charging between the paper scraps 12.

  Further, comparing the case where the fan 7 is “always stopped” and “stopped at the time of paper shredding and operated after paper shredding”, the charging potential immediately after is the same, but there is a difference in the reduction amount of the charging potential thereafter. It can be seen that the reduction amount of the latter is larger. This seems to be because the generated positive ions are widely irradiated in the shredded waste storage box 10 in the wind blown from the fan 7.

  From this result, it can be seen that the ion discharge fan 7 can obtain a higher static electricity reduction effect when it is “stopped when paper is shredded and operated after paper shredding”.

  As Example 3, instead of an ion generator that generates only positive ions among the positive ion generators used in the present invention, positive and negative ions are generated from the same discharge electrode 2, and positive ions are generated more than the amount of negative ions generated. The static electricity reduction test similar to Example 1 is implemented about the ion generator with much generation amount. This ion generator has the same external shape as the positive ion generator A used in Example 1, and is obtained by adding components to the high voltage generator 1 so as to generate both positive and negative ions. The incidence rate can be adjusted.

  FIG. 11 shows the static electricity reduction test result according to the third embodiment. This test was performed under two conditions: when the ratio of the positive ion generation amount and the negative ion generation amount was adjusted to “3: 2” and “2: 1”. At this time, the fan 7 is not operated.

  From this result, it can be seen that, even if both positive and negative ions are generated, if the amount of positive ions generated is larger than the amount of negative ions generated, an effect of reducing static electricity is obtained, and the effect increases as the ratio of positive ions increases.

  Next, “Generate positive ions (method of the present invention)” and the conventional technique “Generate positive and negative ions (method to reduce static electricity using the same amount of positive and negative ions)” and “Expose positive ions (positive ions) The test was conducted in the same manner as in Example 1 for comparison with the present invention under the three conditions of “a positive electrode is forcibly exposed by adding a counter electrode and a fan 7 to the generator A”. .

  In addition, the positive / negative ion generator used for this test attaches the counter electrode connected to the GND potential of the high voltage generation circuit in the vicinity of the ion outlet 6c, and blows positive and negative ions generated alternately from the same electrode by the fan 7. In this way, the balance between positive and negative ions is adjusted.

  Further, the positive electrode generator used in the method of forcibly exposing positive ions by adding the counter electrode and the fan 7 to the positive ion generator A is also connected to the GND potential of the high voltage generation circuit 1. Is attached in the vicinity of the ion outlet 6c.

  FIG. 12 shows a comparison test result of the static electricity reducing effect of the present invention and the prior art. Looking at the result, when the “positive and negative ions are generated” in the prior art, the static charge is slightly reduced to about −8 kV immediately after the charging potential, but when the “positive ions are generated” according to the present invention. It can be seen that the effect of reducing static electricity is about half that of -4 kV.

  In the case of “exposing positive ions”, a large amount of positive ions are generated between the discharge electrode 2 and the counter electrode and forcibly irradiated by the fan 7, so that the static electricity is almost zero after 10 seconds. However, since positive ions are forcibly exposed after that, the paper waste 12 is charged positively. In addition, since there is a counter electrode in this condition, the amount of ozone generated increases several times compared to the case where there is no counter electrode, and there is a smell peculiar to ozone. For this reason, when used in a closed space, it is necessary to set and control the output voltage, the operation time, etc. in consideration of the amount of ozone generated.

  From the above results, it can be seen that the method of the present invention, which can self-adjust the generation amount of positive ions according to the charged state in the shredder 8, has a small ozone generation amount, and is advantageous in terms of cost, is the most excellent.

  Finally, the third embodiment is a shredder 8 having a humidity sensor 13 that detects the humidity around the shredder 8. FIG. 13 shows a block diagram of a third embodiment of the shredder of the present invention. The humidity sensor 13 detects the ambient humidity and outputs an electrical signal corresponding to the detected humidity to the positive ion generator A control circuit 14, and the positive ion generator A control circuit 14 outputs the input electrical signal. It is possible to operate / stop the positive ion generator A according to the value.

  In general, static electricity is likely to be generated when the humidity is 60% RH or less, and is difficult to be generated above that. Therefore, in the third embodiment, when the ambient humidity is 60% RH or less, the positive ion generator A is operated to reduce the negative static electricity generated in the paper waste 12 due to the generated positive ions. On the contrary, since the static electricity hardly occurs when the humidity is higher than 60% RH, the positive ion generator A is controlled not to operate.

  FIG. 14 shows a control diagram of the positive ion generator A of the third embodiment. The positive ion generator A is controlled so as to operate when the humidity is 60% RH or less and to stop when the humidity is higher than 60% RH. Only when the positive ion generator A is operated, the negative static electricity of the paper waste 12 is reduced by the generated positive ions.

  With the shredder of the present invention, negative static electricity generated when shredding unnecessary paper or the like can be efficiently reduced over a wide area inside the main body by the action of positive ions.

It is Example 1 of the shredder of this invention. It is an outline figure of positive ion generator A used for the present invention. It is a table | surface which shows the electrical property of the positive ion generator A used for this invention. It is the schematic of the positive ion generator A attachment part 6 in the shredder of this invention. It is an attachment position figure of positive ion generator A attachment part 6. FIG. It is a figure which shows the relationship between the attachment position of the positive ion generator A attachment part 6, and a static electricity reduction effect. It is a figure which shows the relationship between the output voltage of the positive ion generator A, and static electricity reduction effect. It is Example 2 of the shredder of this invention. FIG. 10 is a control time chart of the paper shredding unit 9, the positive ion generator A, and the fan 7 according to the second embodiment. It is the static reduction test result by the present Example 2. It is Example 3 of the shredder of this invention. It is a comparative test result of the static electricity reduction effect of this invention and a prior art. It is a block diagram of Example 3 of the shredder of the present invention. It is a control diagram of the positive ion generator A of the third embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... High voltage generator, 2 ... Discharge electrode, 3 ... + input lead wire, 4 ...-input lead wire,
5 ... High voltage output line, 6 ... Positive ion generator mounting part, 6a ... High voltage generator 1 storage part,
6b ... Ion generating air path, 6c ... Ion outlet, 7 ... Fan, 8 ... Shredder,
9: Paper shredder, 10 ... Shredded waste storage box, 11 ... Paper, 12 ... Paper waste,
DESCRIPTION OF SYMBOLS 13 ... Humidity sensor, 14 ... Positive ion generator A control circuit A ... Positive ion generator, B, C, D, E ... Installation position of positive ion generator A attachment part 6,
M: Location for measuring charged potential

Claims (7)

In a shredder comprising a main body, a shredder that shreds the paper, and a shredder waste storage box that receives and stores the paper shredded by the shredder, positive ions are generated in the main body. A positive ion generator is provided, and the positive ion generator uses the potential difference between the potential of the discharge electrode for generating positive ions and the charged potential of the paper shredded at the shredding portion to shred the positive ions. Shredder characterized by irradiating paper shredded at the section. The shredder according to claim 1, wherein the irradiation direction of the positive ions is a thickness surface direction with respect to the paper to be shredded by the shredded portion. 3. The shredder according to claim 1, wherein an irradiation direction of the positive ions is in the vicinity of an upper portion of the shredded waste storage box. 4. The shredder according to claim 1, wherein irradiation of the positive ions is started in conjunction with the start of operation of the shredded portion. 5. The shredder according to claim 1, further comprising a fan that irradiates positive ions to the paper stored in the shredded waste storage box. 6. The shredder according to claim 5, wherein the fan is stopped during the operation of the shredded portion, and the fan is operated after the operation of the shredded portion is completed. 7. The shredder according to claim 1, wherein the main body portion includes a humidity sensor that detects an external humidity, and the positive ion generator is operated by a signal corresponding to the humidity detected by the humidity sensor. Shredder characterized by controlling.

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