WO2019198344A1 - Image formation device - Google Patents

Image formation device Download PDF

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Publication number
WO2019198344A1
WO2019198344A1 PCT/JP2019/006081 JP2019006081W WO2019198344A1 WO 2019198344 A1 WO2019198344 A1 WO 2019198344A1 JP 2019006081 W JP2019006081 W JP 2019006081W WO 2019198344 A1 WO2019198344 A1 WO 2019198344A1
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WO
WIPO (PCT)
Prior art keywords
unit
cooling tube
image forming
heat receiving
heat
Prior art date
Application number
PCT/JP2019/006081
Other languages
French (fr)
Japanese (ja)
Inventor
山下　和也
Original Assignee
京セラドキュメントソリューションズ株式会社
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Publication date
Application filed by 京セラドキュメントソリューションズ株式会社 filed Critical 京セラドキュメントソリューションズ株式会社
Publication of WO2019198344A1 publication Critical patent/WO2019198344A1/en

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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge

Definitions

  • the present invention relates to an image forming apparatus.
  • the image forming apparatus described in Patent Document 1 includes a developing unit and a cooling unit.
  • the cooling unit cools the developing unit.
  • the cooling unit includes a heat receiving unit, a cooling unit, a circulation pipe, a cooling pump, and a reserve tank.
  • the heat receiving portion is in pressure contact with the wall surface of the developing unit and receives heat from the developing unit.
  • the cooling unit cools the coolant.
  • the circulation pipe flows the coolant.
  • the cooling pump circulates the coolant in the circulation pipe.
  • the reserve tank stores the coolant.
  • the heat receiving part has a heat receiving part main body, and a flow path is provided inside the heat receiving part main body. A coolant flows in the flow path.
  • Each of the heat receiving main body and the flow path is formed of a metal material such as copper or aluminum.
  • a circulation pipe is connected to the tip of the flow path.
  • the present invention has been made in view of the above problems, and an object thereof is to provide an image forming apparatus capable of manufacturing a cooling unit at low cost.
  • the image forming apparatus includes a photosensitive drum, a developing unit, and a cooling unit.
  • An electrostatic latent image is formed on the photosensitive drum.
  • the developing unit supplies toner to the electrostatic latent image to form a toner image.
  • the cooling unit cools the developing unit.
  • the cooling unit includes a heat receiving portion, a heat radiating portion, and a cooling tube.
  • the heat receiving unit receives heat from the developing unit.
  • the heat radiating part radiates heat received by the heat receiving part.
  • the cooling tube returns the coolant sent from the heat radiating part to the heat radiating part via the heat receiving part.
  • the heat receiving part has a holding member. The holding member presses the cooling tube against the developing device.
  • the cooling unit can be manufactured at low cost.
  • FIG. 1 is a diagram illustrating a configuration of an image forming apparatus according to an embodiment of the present invention.
  • FIG. 2 is a diagram illustrating a configuration of an image forming unit according to an embodiment of the present invention. It is a figure which shows the structure of the cooling unit which concerns on embodiment of this invention. It is sectional drawing which shows an example of a structure of a heat receiving part. It is sectional drawing which shows an example of a structure of a holding member. It is sectional drawing which shows an example of a structure of a heat receiving part.
  • FIG. 1 is a diagram illustrating a configuration of the image forming apparatus 100.
  • the image forming apparatus 100 is a color complex machine.
  • the image forming apparatus 100 includes an image forming unit 1, an image reading unit 2, a document conveying unit 3, an operation display unit 7, and a control unit 8.
  • the image forming unit 1 forms an image on the paper P.
  • the image reading unit 2 reads an image formed on the document R and generates image information.
  • the document transport unit 3 transports the document R to the image reading unit 2.
  • the operation display unit 7 receives user operations.
  • the control unit 8 controls the operation of the image forming apparatus 100.
  • FIG. 1 shows an X axis, a Y axis, and a Z axis that are orthogonal to each other.
  • the X axis and the Y axis are parallel to the horizontal plane.
  • the Z axis is parallel to the vertical direction.
  • the positive direction side of the Y axis may be referred to as the back side
  • the negative direction side of the Y axis may be referred to as the front side.
  • the image forming unit 1 includes a feeding unit 12, a conveying unit L, a toner supplying unit 13, an image forming unit 4, a fixing unit 16, and a discharging unit 17.
  • the image forming unit 4 includes a transfer unit 5.
  • the feeding unit 12 supplies the paper P to the transport unit L.
  • the transport unit L transports the paper P to the discharge unit 17 via the transfer unit 5 and the fixing unit 16.
  • a toner container is attached to the toner supply unit 13.
  • the toner container supplies toner to the image forming unit 4.
  • the image forming unit 4 forms an image on the paper P. The configuration of the image forming unit 4 will be described in detail later with reference to FIG.
  • the transfer unit 5 includes an intermediate transfer belt 54.
  • the image forming unit 4 transfers cyan, magenta, yellow, and black toner images onto the intermediate transfer belt 54. A plurality of color toner images are superimposed on the intermediate transfer belt 54, and an image is formed on the intermediate transfer belt 54.
  • the transfer unit 5 transfers the image formed on the intermediate transfer belt 54 onto the paper P. As a result, an image is formed on the paper P.
  • the fixing unit 16 heats and pressurizes the paper P, and fixes the image formed on the paper P to the paper P.
  • the discharge unit 17 discharges the paper P to the outside of the image forming apparatus 100.
  • the operation display unit 7 includes a touch panel 71.
  • the touch panel 71 includes, for example, an LCD (Liquid Crystal Display) and displays various images.
  • the touch panel 71 includes a touch sensor and receives an operation from the user.
  • the control unit 8 includes a processor 81 and a storage unit 82.
  • the processor 81 includes, for example, a CPU (Central Processing Unit).
  • the storage unit 82 includes a memory such as a semiconductor memory, and may include an HDD (Hard Disk Drive).
  • the storage unit 82 stores a control program.
  • FIG. 2 is a diagram illustrating an example of the configuration of the image forming unit 4.
  • the image forming unit 4 includes an image forming unit 4c, an image forming unit 4m, an image forming unit 4y, and an image forming unit 4k.
  • the image forming apparatus 100 further includes a cooling unit 6.
  • Each of the image forming unit 4c, the image forming unit 4m, the image forming unit 4y, and the image forming unit 4k includes an exposure unit 41, a photosensitive drum 42, a developing unit 43, a charging roller 44, and a cleaning blade 45.
  • the developing unit 43 has a developing roller 431.
  • the configurations of the image forming unit 4c, the image forming unit 4m, the image forming unit 4y, and the image forming unit 4k are substantially the same except for the color of the supplied toner.
  • the photosensitive drum 42 corresponds to an example of an “image carrier”.
  • the image forming unit 4 c includes an exposure unit 41, a photosensitive drum 42, a developing unit 43, a charging roller 44, and a cleaning blade 45.
  • the developing unit 43 corresponds to an example of a “developer”.
  • the charging roller 44 charges the photosensitive drum 42 to a predetermined potential.
  • the exposure unit 41 exposes the photosensitive drum 42 by irradiating a laser beam to form an electrostatic latent image on the photosensitive drum 42.
  • the developing unit 43 has a developing roller 431.
  • the developing roller 431 supplies cyan toner to the photosensitive drum 42 and develops the electrostatic latent image to form a toner image. In this way, a cyan toner image is formed on the peripheral surface of the photosensitive drum 42.
  • the developing unit 43 further includes a storage unit 432.
  • the storage unit 432 stores the developing roller 431 and toner. Toner 432 is supplied with toner from the toner container.
  • the tip (upper end in FIG. 2) of the cleaning blade 45 is in sliding contact with the peripheral surface of the photosensitive drum 42.
  • the cyan toner remaining on the peripheral surface of the photosensitive drum 42 is removed by the sliding contact between the peripheral surface of the photosensitive drum 42 and the tip of the cleaning blade 45.
  • the transfer unit 5 transfers the toner image onto the paper P.
  • the transfer unit 5 includes a primary transfer roller 51, a secondary transfer roller 52, a driving roller 53, an intermediate transfer belt 54, and a driven roller 55.
  • the primary transfer roller 51 transfers cyan, magenta, yellow, and black toner images from the photosensitive drum 42 to the intermediate transfer belt 54.
  • the driving roller 53 drives the intermediate transfer belt 54.
  • the intermediate transfer belt 54 is an endless belt that is stretched around the primary transfer roller 51, the drive roller 53, and the driven roller 55.
  • the intermediate transfer belt 54 is driven to rotate counterclockwise by the driving roller 53 as shown in the direction DR1 and the direction DR2.
  • the driven roller 55 is driven to rotate as the intermediate transfer belt 54 rotates.
  • the blade 56 removes toner remaining on the surface of the intermediate transfer belt 54.
  • the secondary transfer roller 52 is pressed by the drive roller 53, and a nip portion NQ is formed between the secondary transfer roller 52 and the drive roller 53.
  • the secondary transfer roller 52 transfers the toner image on the intermediate transfer belt 54 to the paper P when the paper P passes through the nip portion NQ.
  • the cooling unit 6 includes a heat receiving portion 61c, a heat receiving portion 61m, a heat receiving portion 61y, a heat receiving portion 61k, and a heat radiating portion 62.
  • the heat receiving unit 61c receives the heat of the developing unit 43 in the image forming unit 4c.
  • the heat receiving unit 61m receives the heat of the developing unit 43 in the image forming unit 4m.
  • the heat receiving unit 61y receives the heat of the developing unit 43 in the image forming unit 4y.
  • the heat receiving unit 61k receives the heat of the developing unit 43 in the image forming unit 4k.
  • the heat radiating part 62 radiates the heat received by the heat receiving part 61c, the heat receiving part 61m, the heat receiving part 61y, and the heat receiving part 61k.
  • each of the heat receiving part 61c, the heat receiving part 61m, the heat receiving part 61y, and the heat receiving part 61k may be referred to as a heat receiving part 61.
  • the heat receiving unit 61 is disposed so as to contact the lower surface of the storage unit 432.
  • the heat dissipating unit 62 is disposed on the downstream side in the direction DR1 with respect to the image forming unit 4k.
  • the heat radiating unit 62 is disposed below the drive roller 53.
  • the heat receiving part 61 has a holding member. The holding member presses the cooling tube against the developing unit 43.
  • the cooling tube will be described in detail later with reference to FIG.
  • the holding member will be described in detail later with reference to FIGS.
  • FIG. 3 is a diagram illustrating a configuration of the cooling unit 6.
  • the cooling unit 6 further includes one cooling tube 63.
  • the cooling tube 63 returns the coolant sent out from the heat radiating unit 62 to the heat radiating unit 62 via the heat receiving unit 61.
  • the cooling tube 63 causes the cooling liquid to flow in the direction DW.
  • the cooling tube 63 causes the coolant sent out from the heat radiating unit 62 to flow into the heat receiving unit 61k.
  • the cooling tube 63 causes the coolant sent out from the heat receiving part 61k to flow into the heat receiving part 61y.
  • the cooling tube 63 allows the coolant sent from the heat receiving part 61y to flow into the heat receiving part 61m.
  • the cooling tube 63 causes the coolant sent out from the heat receiving part 61m to flow into the heat receiving part 61c.
  • the cooling tube 63 returns the cooling liquid sent out from the heat receiving portion 61 c to the heat radiating portion 62.
  • the cooling tube 63 has elasticity.
  • the cooling tube 63 is made of, for example, resin.
  • the cooling tube 63 contains a heat conductive filler.
  • the thermal conductivity of the cooling tube 63 is preferably 0.5 to 20 W / mK.
  • the heat conductivity of the cooling tube 63 is more preferably 1 W / mK or more.
  • the cooling tube 63 is produced by blending a base rubber, a heat conductive filler, and a softening agent.
  • the base rubber is composed of 70 to 95 parts by mass of acrylic rubber (trade name Nipol AR54 manufactured by Nippon Zeon Co., Ltd.) and 30 to 5 parts by mass of thermoplastic elastomer (trade name Septon (registered trademark) 4055 manufactured by Kuraray Co., Ltd.). Formed.
  • Thermally conductive fillers include aluminum oxide A (trade name AH35-2, manufactured by Micron), aluminum oxide B (trade name AS-20, manufactured by Showa Denko KK), and aluminum hydroxide (trade name, manufactured by Nippon Light Metal Co., Ltd.). At least one of Nikko Gold B-103) is blended.
  • oil C (made by ADEKA, trade name Adekasizer (registered trademark) RS700) and oil D (made by Idemitsu Kosan Co., Ltd., trade name: Diana (registered trademark) process PW380) are blended.
  • the cooling tube 63 is formed of resin. Therefore, the cooling unit 6 can be manufactured at a lower cost than when the cooling tube 63 is formed of a metal material such as aluminum and copper.
  • the cooling tube 63 includes a heat conductive filler. Therefore, the thermal conductivity of the cooling tube 63 can be increased. Therefore, the heat of the developing unit 43 can be efficiently transmitted to the coolant in the heat receiving unit 61. As a result, the developing unit 43 can be cooled more efficiently.
  • the thermal conductivity of the cooling tube 63 is 1 W / mK or more. Therefore, the heat of the developing unit 43 can be efficiently transmitted to the coolant in the heat receiving unit 61. Therefore, the developing unit 43 can be cooled more efficiently.
  • FIG. 4 is a diagram illustrating a configuration of the heat receiving unit 61.
  • FIG. 4 is a cross-sectional view of the heat receiving portion 61.
  • the heat receiving portion 61 has a holding member 610.
  • the holding member 610 presses the cooling tube 63 against the developing unit 43.
  • the holding member 610 is made of resin, for example.
  • the holding member 610 has two recesses 611.
  • the long side of the holding member 610 extends along the Y-axis direction.
  • the short side of the holding member 610 extends along the X-axis direction. That is, each of the upper surface and the bottom surface of the holding member 610 is disposed along the XY plane.
  • Each of the two recesses 611 is formed along the Y axis.
  • the cooling tube 63 is placed in the recess 611.
  • the recess 611 positions the cooling tube 63.
  • the two recesses 611 are configured by a recess 611K and a recess 611M.
  • the recess 611K is formed on the upper side of the holding member 610 on the positive side of the X axis.
  • the recess 611M is formed on the negative surface side of the X axis on the upper surface of the holding member 610.
  • the cooling tube 63 is disposed in the recess 611K so that the coolant flows from the positive end of the Y axis of the holding member 610 toward the negative end of the Y axis of the holding member 610, and in the negative direction of the Y axis of the holding member 610. It protrudes from the end and is bent into a U shape.
  • the cooling tube 63 is disposed in the recess 611M so that the coolant flows from the negative end of the Y axis of the holding member 610 toward the positive end of the Y axis of the holding member 610.
  • the cooling tube 63 is disposed on the upper surface side (the positive direction side of the Z axis) of the holding member 610.
  • the upper surface of the cooling tube 63 is disposed in the recess 611 so as to protrude upward from the upper surface of the holding member 610.
  • FIG. 5 is a cross-sectional view showing an example of the configuration of the holding member 610.
  • the holding member 610 includes two recesses 611 (a recess 611K and a recess 611M).
  • the depth LA of the recess 611 is smaller than the outer diameter DC of the cooling tube 63. Specifically, the depth LA is not less than half of the outer diameter DC and not more than 3/4 of the outer diameter DC.
  • the depth LA indicates the size of the recess 611 in the Z-axis direction.
  • the outer diameter DC indicates the diameter of the outer periphery of the cooling tube 63.
  • the width LB of the recess 611 is larger than the outer diameter DC of the cooling tube 63.
  • the width LB is 1.5 to 2 times the outer diameter DC of the cooling tube 63.
  • the recess 611 has a bottom surface 611A, a side surface 611B, and a connection surface 611C.
  • the bottom surface 611A is formed in a planar shape.
  • the side surface 611B is formed in a planar shape.
  • the connection surface 611C smoothly connects the bottom surface 611A and the side surface 611B. Specifically, the cross section of the connection surface 611C is formed in an arc shape.
  • FIG. 6 is a cross-sectional view showing an example of the configuration of the heat receiving unit 61.
  • the upper surface of the holding member 610 is in contact with the bottom surface of the storage portion 432. Since the depth LA of the recess 611 is smaller than the outer diameter DC of the cooling tube 63, the cooling tube 63 is pressed by the bottom surface of the storage portion 432 and the recess 611 and is deformed into an oval shape.
  • the heat receiving unit 61 is used in a state where the upper surface of the holding member 610 is in contact with the bottom surface of the storage unit 432.
  • FIG. 6 is a diagram illustrating a usage state of the heat receiving unit 61. That is, the holding member 610 is fixed to the developing unit 43 at the position shown in FIG.
  • the cooling unit 6 can be manufactured at low cost.
  • the holding member 610 presses the cooling tube 63 against the developing unit 43, so that the cooling tube 63 is deformed into an oval shape. Therefore, the contact area between the cooling tube 63 and the developing unit 43 can be increased. Therefore, the cooling efficiency of the cooling unit 6 can be improved.
  • the cooling tube 63 is positioned by the recess 611. Therefore, the cooling tube 63 can be disposed at an appropriate position. Therefore, the heat of the developing unit 43 can be more efficiently transmitted to the coolant.
  • the depth LA of the recess 611 is not less than half of the outer diameter DC of the cooling tube 63 and not more than 3/4 of the outer diameter DC of the cooling tube 63. Therefore, the cooling tube 63 can be reliably pressed against the developing unit 43, and the cooling tube 63 can be prevented from being crushed so that it is difficult for the cooling water to flow through the cooling tube 63.
  • the holding member 610 is formed of resin, the cooling unit 6 can be manufactured at a lower cost.
  • the holding member 610 presses the cooling tube 63 against the bottom surface of the developing unit 43, but the present invention is not limited to this.
  • the holding member 610 may press the cooling tube 63 against the developing unit 43.
  • the holding member 610 may press the cooling tube 63 against the side surface of the developing unit 43.
  • the holding member 610 may press the cooling tube 63 against the developing unit 43.
  • the holding member 610 may be formed in a flat plate shape. In this case, the holding member 610 can be manufactured at a lower cost.
  • the holding member 610 is formed of resin, the present invention is not limited to this.
  • the holding member 610 may press the cooling tube 63 against the developing unit 43.
  • the holding member 610 may be made of metal. In this case, the heat of the developing unit 43 can be more efficiently transferred to the coolant.
  • the heat receiving part 61 has the two recessed parts 611, this invention is not limited to this.
  • the heat receiving part 61 should just have a recessed part.
  • the heat receiving part 61 may have only one recess.
  • the heat receiving part 61 may have three or more recessed parts.
  • the cooling unit 6 includes the four heat receiving units 61 (the heat receiving unit 61k, the heat receiving unit 61y, the heat receiving unit 61m, and the heat receiving unit 61c), the present invention is not limited to this.
  • the cooling unit 6 may have only one heat receiving part 61. Specifically, one heat receiving unit 61 cools the four developing units 43. In this case, the configuration of the cooling unit 6 can be simplified.
  • One heat receiving portion 61 corresponds to an example of “one member”.
  • the cooling unit 6 may have only two heat receiving parts 61. Specifically, one heat receiving part 61 of the two heat receiving parts 61 cools the two developing parts 43, and the other heat receiving part 61 of the two heat receiving parts 61 is the other two developing parts. 43 is cooled.
  • the image forming apparatus 100 is a color multifunction peripheral, but the present invention is not limited to this.
  • the image forming apparatus may form an image on the paper P.
  • the image forming apparatus may be a color printer, for example.
  • the image forming apparatus may be a monochrome copying machine, for example.
  • the cooling tube 63 uses the cooling liquid sent out from the heat radiating unit 62 to receive the heat receiving unit 61k, the heat receiving unit 61y, and the heat receiving unit. Although it returns to the thermal radiation part 62 via 61m and the heat receiving part 61c, this invention is not limited to this. If the cooling tube 63 returns the coolant sent out from the heat radiating unit 62 to the heat radiating unit 62 via at least one of the heat receiving unit 61k, the heat receiving unit 61y, the heat receiving unit 61m, and the heat receiving unit 61c. Good.
  • one cooling tube 63 returns the cooling liquid sent out from the heat radiating unit 62 to the heat radiating unit 62 via the heat receiving unit 61k and the heat receiving unit 61y, and the other one cooling tube 63 is connected to the heat radiating unit.
  • the coolant sent out from 62 may be returned to the heat radiating unit 62 via the heat receiving unit 61m and the heat receiving unit 61c.
  • the cooling tube 63 may be composed of four cooling tubes 63 (first cooling tube to fourth cooling tube). Specifically, the first cooling tube returns the coolant sent out from the heat radiating unit 62 to the heat radiating unit 62 via the heat receiving unit 61k. The second cooling tube returns the coolant sent out from the heat radiating unit 62 to the heat radiating unit 62 via the heat receiving unit 61y. The third cooling tube returns the coolant sent out from the heat radiating unit 62 to the heat radiating unit 62 via the heat receiving unit 61m. The fourth cooling tube returns the coolant sent from the heat radiating part 62 to the heat radiating part 62 via the heat receiving part 61c.
  • the present invention can be used in the field of image forming apparatuses.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Control Or Security For Electrophotography (AREA)

Abstract

An image formation device (100) includes a photosensitive drum (42), a developing unit (43), and a cooling unit (6). The photosensitive drum (42) forms an electrostatic latent image. The developing unit (43) supplies toner to the electrostatic latent image to form a toner image. The cooling unit (6) cools the developing unit (43). The cooling unit (6) includes a heat receiving unit (61), a heat dissipation unit (62), and a cooling tube (63). The heat receiving unit (61) receives heat from the developing unit (43). The heat dissipation unit (62) dissipates heat received by the heat receiving unit (61). The cooling tube (63) returns the coolant delivered from the heat dissipation unit (62) back to the heat dissipation unit (62) via the heat receiving unit (61). The heat receiving unit (61) has a retaining member (610) that presses the cooling tube (63) against the developing unit (43).

Description

画像形成装置Image forming apparatus
　本発明は、画像形成装置に関する。 The present invention relates to an image forming apparatus.
　特許文献１に記載の画像形成装置は、現像ユニットと、冷却ユニットとを備える。冷却ユニットは、現像ユニットを冷却する。冷却ユニットは、受熱部、冷却部、循環パイプ、冷却ポンプ、及びリザーブタンクを備える。受熱部は、現像ユニットの壁面に圧接し、現像ユニットから熱を受ける。冷却部は、冷却液を冷却する。循環パイプは、冷却液を流動する。冷却ポンプは、冷却液を循環パイプ内で循環させる。リザーブタンクは、冷却液を貯留する。受熱部は、受熱部本体を有し、受熱部本体の内部に流路が設けられている。流路には、冷却液が流れる。受熱本体及び流路の各々は、銅、又はアルミニウムのような金属材料で形成されている。流路の先端には、循環パイプが接続されている。 The image forming apparatus described in Patent Document 1 includes a developing unit and a cooling unit. The cooling unit cools the developing unit. The cooling unit includes a heat receiving unit, a cooling unit, a circulation pipe, a cooling pump, and a reserve tank. The heat receiving portion is in pressure contact with the wall surface of the developing unit and receives heat from the developing unit. The cooling unit cools the coolant. The circulation pipe flows the coolant. The cooling pump circulates the coolant in the circulation pipe. The reserve tank stores the coolant. The heat receiving part has a heat receiving part main body, and a flow path is provided inside the heat receiving part main body. A coolant flows in the flow path. Each of the heat receiving main body and the flow path is formed of a metal material such as copper or aluminum. A circulation pipe is connected to the tip of the flow path.
特開２０１０－２４４０１０号公報JP 2010-244010 A
　しかしながら、特許文献１に記載の画像形成装置によれば、受熱部を製造するために金属製部品同士を接合する必要がある。よって、受熱部の製造コストが高くなる。その結果、冷却ユニットの製造コストが高価になる。 However, according to the image forming apparatus described in Patent Document 1, it is necessary to join metal parts together in order to manufacture the heat receiving portion. Therefore, the manufacturing cost of the heat receiving part increases. As a result, the manufacturing cost of the cooling unit becomes expensive.
　本発明は、上記課題に鑑みてなされたものであり、冷却ユニットを安価に製造することが可能な画像形成装置を提供することを目的としている。 The present invention has been made in view of the above problems, and an object thereof is to provide an image forming apparatus capable of manufacturing a cooling unit at low cost.
　本発明に係る画像形成装置は、感光体ドラムと、現像部と、冷却ユニットとを備える。前記感光体ドラムは、静電潜像が形成される。前記現像部は、前記静電潜像にトナーを供給しトナー像を形成する。前記冷却ユニットは、前記現像部を冷却する。前記冷却ユニットは、受熱部と、放熱部と、冷却チューブとを備える。前記受熱部は、前記現像部の熱を受熱する。前記放熱部は、前記受熱部が受熱した熱を放熱する。前記冷却チューブは、前記放熱部から送り出された冷却液を、前記受熱部を経由して前記放熱部に戻す。前記受熱部は、保持部材を有する。前記保持部材は、前記冷却チューブを前記現像器に押し当てる。 The image forming apparatus according to the present invention includes a photosensitive drum, a developing unit, and a cooling unit. An electrostatic latent image is formed on the photosensitive drum. The developing unit supplies toner to the electrostatic latent image to form a toner image. The cooling unit cools the developing unit. The cooling unit includes a heat receiving portion, a heat radiating portion, and a cooling tube. The heat receiving unit receives heat from the developing unit. The heat radiating part radiates heat received by the heat receiving part. The cooling tube returns the coolant sent from the heat radiating part to the heat radiating part via the heat receiving part. The heat receiving part has a holding member. The holding member presses the cooling tube against the developing device.
　本発明の画像形成装置によれば、冷却ユニットを安価に製造できる。 According to the image forming apparatus of the present invention, the cooling unit can be manufactured at low cost.
本発明の実施形態に係る画像形成装置の構成を示す図である。1 is a diagram illustrating a configuration of an image forming apparatus according to an embodiment of the present invention. 本発明の実施形態に係る画像形成部の構成を示す図である。FIG. 2 is a diagram illustrating a configuration of an image forming unit according to an embodiment of the present invention. 本発明の実施形態に係る冷却ユニットの構成を示す図である。It is a figure which shows the structure of the cooling unit which concerns on embodiment of this invention. 受熱部の構成の一例を示す断面図である。It is sectional drawing which shows an example of a structure of a heat receiving part. 保持部材の構成の一例を示す断面図である。It is sectional drawing which shows an example of a structure of a holding member. 受熱部の構成の一例を示す断面図である。It is sectional drawing which shows an example of a structure of a heat receiving part.
　以下、本発明の実施形態について、図面（図１～図６）を参照しながら説明する。なお、図中、同一又は相当部分については同一の参照符号を付して説明を繰り返さない。 Hereinafter, embodiments of the present invention will be described with reference to the drawings (FIGS. 1 to 6). In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof is not repeated.
　まず、図１を参照して、本発明の実施形態に係る画像形成装置１００の構成について説明する。図１は、画像形成装置１００の構成を示す図である。画像形成装置１００は、カラー複合機である。 First, the configuration of the image forming apparatus 100 according to the embodiment of the present invention will be described with reference to FIG. FIG. 1 is a diagram illustrating a configuration of the image forming apparatus 100. The image forming apparatus 100 is a color complex machine.
　図１に示すように、画像形成装置１００は、画像形成ユニット１、画像読取ユニット２、原稿搬送ユニット３、操作表示部７及び制御部８を備える。画像形成ユニット１は、用紙Ｐに画像を形成する。画像読取ユニット２は、原稿Ｒに形成された画像を読み取り、画像情報を生成する。原稿搬送ユニット３は、原稿Ｒを画像読取ユニット２に搬送する。操作表示部７は、ユーザーの操作を受け付ける。制御部８は、画像形成装置１００の動作を制御する。 As shown in FIG. 1, the image forming apparatus 100 includes an image forming unit 1, an image reading unit 2, a document conveying unit 3, an operation display unit 7, and a control unit 8. The image forming unit 1 forms an image on the paper P. The image reading unit 2 reads an image formed on the document R and generates image information. The document transport unit 3 transports the document R to the image reading unit 2. The operation display unit 7 receives user operations. The control unit 8 controls the operation of the image forming apparatus 100.
　図１には、互いに直交するＸ軸、Ｙ軸及びＺ軸を記載している。Ｘ軸及びＹ軸は、水平面と平行である。Ｚ軸は、鉛直方向と平行である。以下の説明において、Ｙ軸の正方向側を背面側といい、Ｙ軸の負方向側を前面側という場合がある。 FIG. 1 shows an X axis, a Y axis, and a Z axis that are orthogonal to each other. The X axis and the Y axis are parallel to the horizontal plane. The Z axis is parallel to the vertical direction. In the following description, the positive direction side of the Y axis may be referred to as the back side, and the negative direction side of the Y axis may be referred to as the front side.
　画像形成ユニット１は、給送部１２、搬送部Ｌ、トナー供給部１３、画像形成部４、定着部１６及び排出部１７を備える。画像形成部４は、転写部５を含む。 The image forming unit 1 includes a feeding unit 12, a conveying unit L, a toner supplying unit 13, an image forming unit 4, a fixing unit 16, and a discharging unit 17. The image forming unit 4 includes a transfer unit 5.
　給送部１２は、用紙Ｐを搬送部Ｌへ供給する。搬送部Ｌは、用紙Ｐを転写部５及び定着部１６を経由して排出部１７まで搬送する。 The feeding unit 12 supplies the paper P to the transport unit L. The transport unit L transports the paper P to the discharge unit 17 via the transfer unit 5 and the fixing unit 16.
　トナー供給部１３には、トナーコンテナが装着される。トナーコンテナは、画像形成部４にトナーを供給する。画像形成部４は、用紙Ｐに画像を形成する。画像形成部４の構成については、後述にて図２を参照して詳細に説明する。 A toner container is attached to the toner supply unit 13. The toner container supplies toner to the image forming unit 4. The image forming unit 4 forms an image on the paper P. The configuration of the image forming unit 4 will be described in detail later with reference to FIG.
　転写部５は、中間転写ベルト５４を備える。画像形成部４が、中間転写ベルト５４上にシアン色、マゼンタ色、イエロー色、及び黒色のトナー像を転写する。複数色のトナー像が中間転写ベルト５４上で重畳され、中間転写ベルト５４上に画像が形成される。転写部５は、中間転写ベルト５４上に形成された画像を、用紙Ｐ上に転写する。その結果、用紙Ｐに画像が形成される。 The transfer unit 5 includes an intermediate transfer belt 54. The image forming unit 4 transfers cyan, magenta, yellow, and black toner images onto the intermediate transfer belt 54. A plurality of color toner images are superimposed on the intermediate transfer belt 54, and an image is formed on the intermediate transfer belt 54. The transfer unit 5 transfers the image formed on the intermediate transfer belt 54 onto the paper P. As a result, an image is formed on the paper P.
　定着部１６は、用紙Ｐを加熱及び加圧し、用紙Ｐに形成された画像を用紙Ｐに定着する。排出部１７は、用紙Ｐを画像形成装置１００の外部へ排出する。 The fixing unit 16 heats and pressurizes the paper P, and fixes the image formed on the paper P to the paper P. The discharge unit 17 discharges the paper P to the outside of the image forming apparatus 100.
　操作表示部７は、タッチパネル７１を備える。タッチパネル７１は、例えば、ＬＣＤ（Ｌｉｑｕｉｄ　Ｃｒｙｓｔａｌ　Ｄｉｓｐｌａｙ）を備え、種々の画像を表示する。また、タッチパネル７１は、タッチセンサーを備え、ユーザーからの操作を受け付ける。 The operation display unit 7 includes a touch panel 71. The touch panel 71 includes, for example, an LCD (Liquid Crystal Display) and displays various images. The touch panel 71 includes a touch sensor and receives an operation from the user.
　制御部８は、プロセッサー８１及び記憶部８２を備える。プロセッサー８１は、例えばＣＰＵ（Ｃｅｎｔｒａｌ　Ｐｒｏｃｅｓｓｉｎｇ　Ｕｎｉｔ）を備える。記憶部８２は、半導体メモリーのようなメモリーを備え、ＨＤＤ（Ｈａｒｄ　Ｄｉｓｋ　Ｄｒｉｖｅ）を備えてもよい。記憶部８２は、制御プログラムを記憶している。 The control unit 8 includes a processor 81 and a storage unit 82. The processor 81 includes, for example, a CPU (Central Processing Unit). The storage unit 82 includes a memory such as a semiconductor memory, and may include an HDD (Hard Disk Drive). The storage unit 82 stores a control program.
　次に、図１及び図２を参照して、本発明の実施形態に係る画像形成部４の構成について説明する。図２は、画像形成部４の構成の一例を示す図である。図２に示すように、画像形成部４は、画像形成部４ｃ、画像形成部４ｍ、画像形成部４ｙ及び画像形成部４ｋを備える。また、画像形成装置１００は、冷却ユニット６を更に備える。 Next, the configuration of the image forming unit 4 according to the embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 2 is a diagram illustrating an example of the configuration of the image forming unit 4. As shown in FIG. 2, the image forming unit 4 includes an image forming unit 4c, an image forming unit 4m, an image forming unit 4y, and an image forming unit 4k. The image forming apparatus 100 further includes a cooling unit 6.
　画像形成部４ｃ、画像形成部４ｍ、画像形成部４ｙ及び画像形成部４ｋの各々は、露光部４１、感光体ドラム４２、現像部４３、帯電ローラー４４及びクリーニングブレード４５を備える。現像部４３は、現像ローラー４３１を有する。画像形成部４ｃ、画像形成部４ｍ、画像形成部４ｙ及び画像形成部４ｋの各々の構成は、供給されるトナーの色が異なるのみで、その他の構成は略同一である。したがって、以下の説明では、シアン色のトナーが供給される画像形成部４ｃの構成について説明し、画像形成部４ｃ以外の画像形成部４ｍ、画像形成部４ｙ及び画像形成部４ｋの構成についての説明は省略する。感光体ドラム４２は、「像担持体」の一例に相当する。 Each of the image forming unit 4c, the image forming unit 4m, the image forming unit 4y, and the image forming unit 4k includes an exposure unit 41, a photosensitive drum 42, a developing unit 43, a charging roller 44, and a cleaning blade 45. The developing unit 43 has a developing roller 431. The configurations of the image forming unit 4c, the image forming unit 4m, the image forming unit 4y, and the image forming unit 4k are substantially the same except for the color of the supplied toner. Therefore, in the following description, the configuration of the image forming unit 4c to which cyan toner is supplied will be described, and the configuration of the image forming unit 4m, the image forming unit 4y, and the image forming unit 4k other than the image forming unit 4c will be described. Is omitted. The photosensitive drum 42 corresponds to an example of an “image carrier”.
　画像形成部４ｃは、露光部４１、感光体ドラム４２、現像部４３、帯電ローラー４４及びクリーニングブレード４５を有する。現像部４３は、「現像器」の一例に相当する。 The image forming unit 4 c includes an exposure unit 41, a photosensitive drum 42, a developing unit 43, a charging roller 44, and a cleaning blade 45. The developing unit 43 corresponds to an example of a “developer”.
　帯電ローラー４４は、感光体ドラム４２を所定の電位に帯電させる。露光部４１は、感光体ドラム４２にレーザー光を照射して露光し、感光体ドラム４２に静電潜像を形成する。現像部４３は、現像ローラー４３１を有する。現像ローラー４３１は、感光体ドラム４２にシアン色のトナーを供給し、静電潜像を現像してトナー像を形成する。このようにして、感光体ドラム４２の周面にシアン色のトナー像が形成される。 The charging roller 44 charges the photosensitive drum 42 to a predetermined potential. The exposure unit 41 exposes the photosensitive drum 42 by irradiating a laser beam to form an electrostatic latent image on the photosensitive drum 42. The developing unit 43 has a developing roller 431. The developing roller 431 supplies cyan toner to the photosensitive drum 42 and develops the electrostatic latent image to form a toner image. In this way, a cyan toner image is formed on the peripheral surface of the photosensitive drum 42.
　現像部４３は、収納部４３２を更に備える。収納部４３２は、現像ローラー４３１及びトナーを収納する。収納部４３２には、トナーコンテナからトナーが供給される。 The developing unit 43 further includes a storage unit 432. The storage unit 432 stores the developing roller 431 and toner. Toner 432 is supplied with toner from the toner container.
　クリーニングブレード４５は、その先端（図２では上端）が、感光体ドラム４２の周面と摺接する。感光体ドラム４２の周面とクリーニングブレード４５の先端とが摺接することで、感光体ドラム４２の周面に残留するシアン色のトナーが除去される。 The tip (upper end in FIG. 2) of the cleaning blade 45 is in sliding contact with the peripheral surface of the photosensitive drum 42. The cyan toner remaining on the peripheral surface of the photosensitive drum 42 is removed by the sliding contact between the peripheral surface of the photosensitive drum 42 and the tip of the cleaning blade 45.
　転写部５は、用紙Ｐにトナー像を転写する。転写部５は、一次転写ローラー５１、二次転写ローラー５２、駆動ローラー５３、中間転写ベルト５４及び従動ローラー５５を備える。一次転写ローラー５１は、感光体ドラム４２からシアン色、マゼンタ色、イエロー色、及び黒色のトナー像を中間転写ベルト５４に転写する。 The transfer unit 5 transfers the toner image onto the paper P. The transfer unit 5 includes a primary transfer roller 51, a secondary transfer roller 52, a driving roller 53, an intermediate transfer belt 54, and a driven roller 55. The primary transfer roller 51 transfers cyan, magenta, yellow, and black toner images from the photosensitive drum 42 to the intermediate transfer belt 54.
　駆動ローラー５３は、中間転写ベルト５４を駆動する。中間転写ベルト５４は、一次転写ローラー５１、駆動ローラー５３及び従動ローラー５５に張架された無端ベルトである。中間転写ベルト５４は、駆動ローラー５３によって、方向ＤＲ１及び方向ＤＲ２に示すように、反時計回りに回転駆動される。従動ローラー５５は、中間転写ベルト５４の回転に伴って回転駆動される。ブレード５６は、中間転写ベルト５４の表面に残留しているトナーを除去する。 The driving roller 53 drives the intermediate transfer belt 54. The intermediate transfer belt 54 is an endless belt that is stretched around the primary transfer roller 51, the drive roller 53, and the driven roller 55. The intermediate transfer belt 54 is driven to rotate counterclockwise by the driving roller 53 as shown in the direction DR1 and the direction DR2. The driven roller 55 is driven to rotate as the intermediate transfer belt 54 rotates. The blade 56 removes toner remaining on the surface of the intermediate transfer belt 54.
　二次転写ローラー５２は、駆動ローラー５３に押圧され、二次転写ローラー５２と駆動ローラー５３との間にニップ部ＮＱが形成される。二次転写ローラー５２は、用紙Ｐがニップ部ＮＱを通過する際に、中間転写ベルト５４上のトナー像を用紙Ｐに転写する。 The secondary transfer roller 52 is pressed by the drive roller 53, and a nip portion NQ is formed between the secondary transfer roller 52 and the drive roller 53. The secondary transfer roller 52 transfers the toner image on the intermediate transfer belt 54 to the paper P when the paper P passes through the nip portion NQ.
　冷却ユニット６は、受熱部６１ｃと、受熱部６１ｍと、受熱部６１ｙと、受熱部６１ｋと、放熱部６２とを備える。受熱部６１ｃは、画像形成部４ｃにおいて現像部４３の熱を受熱する。受熱部６１ｍは、画像形成部４ｍにおいて現像部４３の熱を受熱する。受熱部６１ｙは、画像形成部４ｙにおいて現像部４３の熱を受熱する。受熱部６１ｋは、画像形成部４ｋにおいて現像部４３の熱を受熱する。放熱部６２は、受熱部６１ｃ、受熱部６１ｍ、受熱部６１ｙ及び受熱部６１ｋが受熱した熱を放熱する。以下の説明において、受熱部６１ｃ、受熱部６１ｍ、受熱部６１ｙ及び受熱部６１ｋの各々を、受熱部６１と記載する場合がある。 The cooling unit 6 includes a heat receiving portion 61c, a heat receiving portion 61m, a heat receiving portion 61y, a heat receiving portion 61k, and a heat radiating portion 62. The heat receiving unit 61c receives the heat of the developing unit 43 in the image forming unit 4c. The heat receiving unit 61m receives the heat of the developing unit 43 in the image forming unit 4m. The heat receiving unit 61y receives the heat of the developing unit 43 in the image forming unit 4y. The heat receiving unit 61k receives the heat of the developing unit 43 in the image forming unit 4k. The heat radiating part 62 radiates the heat received by the heat receiving part 61c, the heat receiving part 61m, the heat receiving part 61y, and the heat receiving part 61k. In the following description, each of the heat receiving part 61c, the heat receiving part 61m, the heat receiving part 61y, and the heat receiving part 61k may be referred to as a heat receiving part 61.
　受熱部６１は、収納部４３２の下面に当接するように配置される。放熱部６２は、画像形成部４ｋに対して方向ＤＲ１の下流側に配置される。換言すれば、放熱部６２は、駆動ローラー５３の下方に配置される。また、受熱部６１は、保持部材を有する。保持部材は、冷却チューブを現像部４３に押し当てる。冷却チューブについては、後述にて図３を参照して詳細に説明する。保持部材については、後述にて図４～図６を参照して詳細に説明する。 The heat receiving unit 61 is disposed so as to contact the lower surface of the storage unit 432. The heat dissipating unit 62 is disposed on the downstream side in the direction DR1 with respect to the image forming unit 4k. In other words, the heat radiating unit 62 is disposed below the drive roller 53. Moreover, the heat receiving part 61 has a holding member. The holding member presses the cooling tube against the developing unit 43. The cooling tube will be described in detail later with reference to FIG. The holding member will be described in detail later with reference to FIGS.
　次に、図１～図３を参照して、本発明の実施形態に係る冷却ユニット６の構成について説明する。図３は、冷却ユニット６の構成を示す図である。冷却ユニット６は、１本の冷却チューブ６３を更に備える。 Next, the configuration of the cooling unit 6 according to the embodiment of the present invention will be described with reference to FIGS. FIG. 3 is a diagram illustrating a configuration of the cooling unit 6. The cooling unit 6 further includes one cooling tube 63.
　冷却チューブ６３は、放熱部６２から送り出された冷却液を、受熱部６１を経由して放熱部６２に戻す。例えば、冷却チューブ６３は、方向ＤＷに冷却液を流動させる。具体的には、冷却チューブ６３は、放熱部６２から送り出された冷却液を受熱部６１ｋに流入させる。そして、冷却チューブ６３は、受熱部６１ｋから送り出された冷却液を受熱部６１ｙに流入させる。更に、冷却チューブ６３は、受熱部６１ｙから送り出された冷却液を受熱部６１ｍに流入させる。そして、冷却チューブ６３は、受熱部６１ｍから送り出された冷却液を受熱部６１ｃに流入させる。更に、冷却チューブ６３は、受熱部６１ｃから送り出された冷却液を放熱部６２に戻す。 The cooling tube 63 returns the coolant sent out from the heat radiating unit 62 to the heat radiating unit 62 via the heat receiving unit 61. For example, the cooling tube 63 causes the cooling liquid to flow in the direction DW. Specifically, the cooling tube 63 causes the coolant sent out from the heat radiating unit 62 to flow into the heat receiving unit 61k. Then, the cooling tube 63 causes the coolant sent out from the heat receiving part 61k to flow into the heat receiving part 61y. Furthermore, the cooling tube 63 allows the coolant sent from the heat receiving part 61y to flow into the heat receiving part 61m. Then, the cooling tube 63 causes the coolant sent out from the heat receiving part 61m to flow into the heat receiving part 61c. Further, the cooling tube 63 returns the cooling liquid sent out from the heat receiving portion 61 c to the heat radiating portion 62.
　冷却チューブ６３は、弾性を有する。冷却チューブ６３は、例えば樹脂で形成される。また、冷却チューブ６３は、熱伝導性フィラーを含む。冷却チューブ６３の熱伝導率は、０．５～２０Ｗ／ｍＫであることが好ましい。冷却チューブ６３の熱伝導率は、１Ｗ／ｍＫ以上であることが更に好ましい。 The cooling tube 63 has elasticity. The cooling tube 63 is made of, for example, resin. Moreover, the cooling tube 63 contains a heat conductive filler. The thermal conductivity of the cooling tube 63 is preferably 0.5 to 20 W / mK. The heat conductivity of the cooling tube 63 is more preferably 1 W / mK or more.
　例えば、冷却チューブ６３は、ベースゴムと、熱伝導性フィラーと、軟化剤とを配合して生成される。ベースゴムは、アクリルゴム（日本ゼオン社製、商品名Ｎｉｐｏｌ　ＡＲ５４）７０～９５質量部と、熱可塑性エラストマー（クラレ社製、商品名セプトン（登録商標）４０５５）３０～５質量部とを配合して形成される。 For example, the cooling tube 63 is produced by blending a base rubber, a heat conductive filler, and a softening agent. The base rubber is composed of 70 to 95 parts by mass of acrylic rubber (trade name Nipol AR54 manufactured by Nippon Zeon Co., Ltd.) and 30 to 5 parts by mass of thermoplastic elastomer (trade name Septon (registered trademark) 4055 manufactured by Kuraray Co., Ltd.). Formed.
　熱伝導性フィラーとしては、酸化アルミニウムＡ（マイクロン社製、商品名ＡＨ３５－２）、酸化アルミニウムＢ（昭和電工社製、商品名ＡＳ－２０）、及び水酸化アルミニウム（日本軽金属社製、商品名日軽金Ｂ－１０３）のうちの少なくとも１つを配合する。 Thermally conductive fillers include aluminum oxide A (trade name AH35-2, manufactured by Micron), aluminum oxide B (trade name AS-20, manufactured by Showa Denko KK), and aluminum hydroxide (trade name, manufactured by Nippon Light Metal Co., Ltd.). At least one of Nikko Gold B-103) is blended.
　軟化剤としては、オイルＣ（ＡＤＥＫＡ社製、商品名アデカサイザー（登録商標）ＲＳ７００）、及びオイルＤ（出光興産社製、商品名ダイアナ（登録商標）プロセスＰＷ３８０）の各々を配合する。 As softeners, oil C (made by ADEKA, trade name Adekasizer (registered trademark) RS700) and oil D (made by Idemitsu Kosan Co., Ltd., trade name: Diana (registered trademark) process PW380) are blended.
　例えば、アクリルゴムを８５質量部と熱可塑性エラストマーを１５質量部とでベースゴムを形成する。そして、酸化アルミニウムＢを８００質量部と水酸化アルミニウムを２００質量部とを配合し、オイルＣを１３０質量部とオイルＤを３０質量部とを配合する。その結果、熱伝導率が１．６３Ｗ／ｍＫの熱伝導性ゴムが得られる。 For example, 85 parts by mass of acrylic rubber and 15 parts by mass of thermoplastic elastomer form a base rubber. Then, 800 parts by mass of aluminum oxide B and 200 parts by mass of aluminum hydroxide are blended, 130 parts by mass of oil C and 30 parts by mass of oil D are blended. As a result, a heat conductive rubber having a heat conductivity of 1.63 W / mK is obtained.
　以上、図１～図３を参照して説明したように、本発明の実施形態では、冷却チューブ６３は樹脂で形成される。したがって、冷却チューブ６３がアルミニウム、及び銅のような金属材料で形成される場合と比較して、冷却ユニット６を安価に製造できる。 As described above with reference to FIGS. 1 to 3, in the embodiment of the present invention, the cooling tube 63 is formed of resin. Therefore, the cooling unit 6 can be manufactured at a lower cost than when the cooling tube 63 is formed of a metal material such as aluminum and copper.
　また、冷却チューブ６３は、熱伝導性フィラーを含む。よって、冷却チューブ６３の熱伝導率を増大できる。したがって、受熱部６１において現像部４３の熱を効率的に冷却液に伝達できる。その結果、現像部４３を更に効率的に冷却できる。 Further, the cooling tube 63 includes a heat conductive filler. Therefore, the thermal conductivity of the cooling tube 63 can be increased. Therefore, the heat of the developing unit 43 can be efficiently transmitted to the coolant in the heat receiving unit 61. As a result, the developing unit 43 can be cooled more efficiently.
　また、冷却チューブ６３の熱伝導率は、１Ｗ／ｍＫ以上である。よって、受熱部６１において現像部４３の熱を効率的に冷却液に伝達できる。したがって、現像部４３を更に効率的に冷却できる。 Moreover, the thermal conductivity of the cooling tube 63 is 1 W / mK or more. Therefore, the heat of the developing unit 43 can be efficiently transmitted to the coolant in the heat receiving unit 61. Therefore, the developing unit 43 can be cooled more efficiently.
　次に、図２～図６を参照して、受熱部６１の構成について説明する。図４は、受熱部６１の構成を示す図である。図４は、受熱部６１の断面図である。 Next, the configuration of the heat receiving unit 61 will be described with reference to FIGS. FIG. 4 is a diagram illustrating a configuration of the heat receiving unit 61. FIG. 4 is a cross-sectional view of the heat receiving portion 61.
　図４に示すように、受熱部６１は、保持部材６１０を有する。保持部材６１０は、冷却チューブ６３を現像部４３に押し当てる。保持部材６１０は、例えば、樹脂で形成される。保持部材６１０は、２つの凹部６１１を有する。 As shown in FIG. 4, the heat receiving portion 61 has a holding member 610. The holding member 610 presses the cooling tube 63 against the developing unit 43. The holding member 610 is made of resin, for example. The holding member 610 has two recesses 611.
　保持部材６１０の長辺は、Ｙ軸方向に沿って延びる。保持部材６１０の短辺は、Ｘ軸方向に沿って延びる。すなわち、保持部材６１０の上面及び底面の各々は、Ｘ－Ｙ平面に沿って配置される。 The long side of the holding member 610 extends along the Y-axis direction. The short side of the holding member 610 extends along the X-axis direction. That is, each of the upper surface and the bottom surface of the holding member 610 is disposed along the XY plane.
　２つの凹部６１１の各々は、Ｙ軸に沿って形成される。凹部６１１には、冷却チューブ６３が載置される。凹部６１１は、冷却チューブ６３を位置決めする。２つの凹部６１１は、凹部６１１Ｋ及び凹部６１１Ｍで構成される。凹部６１１Ｋは、保持部材６１０の上面においてＸ軸の正方向側に形成される。凹部６１１Ｍは、保持部材６１０の上面においてＸ軸の負方向側に形成される。 Each of the two recesses 611 is formed along the Y axis. The cooling tube 63 is placed in the recess 611. The recess 611 positions the cooling tube 63. The two recesses 611 are configured by a recess 611K and a recess 611M. The recess 611K is formed on the upper side of the holding member 610 on the positive side of the X axis. The recess 611M is formed on the negative surface side of the X axis on the upper surface of the holding member 610.
　冷却チューブ６３は、保持部材６１０におけるＹ軸の正方向端から保持部材６１０におけるＹ軸の負方向端に向けて冷却液が流れるように凹部６１１Ｋに配置され、保持部材６１０におけるＹ軸の負方向端から突出してＵ字型に曲げられる。そして、冷却チューブ６３は、保持部材６１０におけるＹ軸の負方向端から保持部材６１０におけるＹ軸の正方向端に向けて冷却液が流入するように、凹部６１１Ｍに配置される。 The cooling tube 63 is disposed in the recess 611K so that the coolant flows from the positive end of the Y axis of the holding member 610 toward the negative end of the Y axis of the holding member 610, and in the negative direction of the Y axis of the holding member 610. It protrudes from the end and is bent into a U shape. The cooling tube 63 is disposed in the recess 611M so that the coolant flows from the negative end of the Y axis of the holding member 610 toward the positive end of the Y axis of the holding member 610.
　冷却チューブ６３は、保持部材６１０の上面側（Ｚ軸の正方向側）に配置される。冷却チューブ６３の上面は、保持部材６１０の上面から上側に突出するように、凹部６１１に配置される。 The cooling tube 63 is disposed on the upper surface side (the positive direction side of the Z axis) of the holding member 610. The upper surface of the cooling tube 63 is disposed in the recess 611 so as to protrude upward from the upper surface of the holding member 610.
　図５は、保持部材６１０の構成の一例を示す断面図である。図５に示すように、保持部材６１０は、２つの凹部６１１（凹部６１１Ｋと凹部６１１Ｍと）を備える。凹部６１１の深さＬＡは、冷却チューブ６３の外径ＤＣより小さい。具体的には、深さＬＡは、外径ＤＣの半分以上、且つ外径ＤＣの３／４以下である。深さＬＡは、凹部６１１のＺ軸方向のサイズを示す。外径ＤＣは、冷却チューブ６３の外周の直径を示す。 FIG. 5 is a cross-sectional view showing an example of the configuration of the holding member 610. As shown in FIG. 5, the holding member 610 includes two recesses 611 (a recess 611K and a recess 611M). The depth LA of the recess 611 is smaller than the outer diameter DC of the cooling tube 63. Specifically, the depth LA is not less than half of the outer diameter DC and not more than 3/4 of the outer diameter DC. The depth LA indicates the size of the recess 611 in the Z-axis direction. The outer diameter DC indicates the diameter of the outer periphery of the cooling tube 63.
　凹部６１１の幅ＬＢは、冷却チューブ６３の外径ＤＣより大きい。例えば、幅ＬＢは、冷却チューブ６３の外径ＤＣの１．５倍～２倍である。 The width LB of the recess 611 is larger than the outer diameter DC of the cooling tube 63. For example, the width LB is 1.5 to 2 times the outer diameter DC of the cooling tube 63.
　凹部６１１は、底面６１１Ａと側面６１１Ｂと接続面６１１Ｃとを有する。底面６１１Ａは、平面状に形成される。側面６１１Ｂは、平面状に形成される。接続面６１１Ｃは、底面６１１Ａと側面６１１Ｂとを滑らかに接続する。具体的には、接続面６１１Ｃの断面は、円弧状に形成される。 The recess 611 has a bottom surface 611A, a side surface 611B, and a connection surface 611C. The bottom surface 611A is formed in a planar shape. The side surface 611B is formed in a planar shape. The connection surface 611C smoothly connects the bottom surface 611A and the side surface 611B. Specifically, the cross section of the connection surface 611C is formed in an arc shape.
　図６は、受熱部６１の構成の一例を示す断面図である。図６に示すように、保持部材６１０の上面は、収納部４３２の底面に当接している。凹部６１１の深さＬＡは、冷却チューブ６３の外径ＤＣより小さいため、冷却チューブ６３は、収納部４３２の底面と凹部６１１とによって押圧されて長円状に変形している。受熱部６１は、図６に示すように、保持部材６１０の上面が収納部４３２の底面に当接した状態で使用される。換言すれば、図６は、受熱部６１の使用状態を示す図である。すなわち、保持部材６１０は、図６に示す位置で現像部４３に固定される。 FIG. 6 is a cross-sectional view showing an example of the configuration of the heat receiving unit 61. As shown in FIG. 6, the upper surface of the holding member 610 is in contact with the bottom surface of the storage portion 432. Since the depth LA of the recess 611 is smaller than the outer diameter DC of the cooling tube 63, the cooling tube 63 is pressed by the bottom surface of the storage portion 432 and the recess 611 and is deformed into an oval shape. As shown in FIG. 6, the heat receiving unit 61 is used in a state where the upper surface of the holding member 610 is in contact with the bottom surface of the storage unit 432. In other words, FIG. 6 is a diagram illustrating a usage state of the heat receiving unit 61. That is, the holding member 610 is fixed to the developing unit 43 at the position shown in FIG.
　以上、図２～図６を参照して説明したように、本発明の実施形態では、保持部材６１０が冷却チューブ６３を現像部４３に押し当てるため、安価に冷却ユニット６を製造できる。 As described above with reference to FIGS. 2 to 6, in the embodiment of the present invention, since the holding member 610 presses the cooling tube 63 against the developing unit 43, the cooling unit 6 can be manufactured at low cost.
　また、冷却チューブ６３は弾性を有するため、保持部材６１０が冷却チューブ６３を現像部４３に押し当てることによって、冷却チューブ６３が長円状に変形する。よって、冷却チューブ６３と現像部４３との接触面積を増加できる。したがって、冷却ユニット６の冷却効率を向上できる。 Further, since the cooling tube 63 has elasticity, the holding member 610 presses the cooling tube 63 against the developing unit 43, so that the cooling tube 63 is deformed into an oval shape. Therefore, the contact area between the cooling tube 63 and the developing unit 43 can be increased. Therefore, the cooling efficiency of the cooling unit 6 can be improved.
　また、冷却チューブ６３が凹部６１１によって位置決めされる。よって、冷却チューブ６３を適正な位置に配置できる。したがって、現像部４３の熱を更に効率的に冷却液に伝達できる。 Also, the cooling tube 63 is positioned by the recess 611. Therefore, the cooling tube 63 can be disposed at an appropriate position. Therefore, the heat of the developing unit 43 can be more efficiently transmitted to the coolant.
　また、凹部６１１の深さＬＡは、冷却チューブ６３の外径ＤＣの半分以上、且つ冷却チューブ６３の外径ＤＣの３／４以下である。したがって、冷却チューブ６３を現像部４３に確実に押し当てることができ、且つ、冷却チューブ６３が潰れ過ぎて冷却チューブ６３内を冷却水が流れ難くなることを抑制できる。 Further, the depth LA of the recess 611 is not less than half of the outer diameter DC of the cooling tube 63 and not more than 3/4 of the outer diameter DC of the cooling tube 63. Therefore, the cooling tube 63 can be reliably pressed against the developing unit 43, and the cooling tube 63 can be prevented from being crushed so that it is difficult for the cooling water to flow through the cooling tube 63.
　また、保持部材６１０は樹脂で形成されるため、冷却ユニット６を更に安価に製造できる。 Further, since the holding member 610 is formed of resin, the cooling unit 6 can be manufactured at a lower cost.
　なお、本発明の実施形態では、保持部材６１０が冷却チューブ６３を現像部４３の底面に押し当てるが、本発明はこれに限定されない。保持部材６１０が冷却チューブ６３を現像部４３に押し当てればよい。例えば、保持部材６１０が冷却チューブ６３を現像部４３の側面に押し当ててもよい。 In the embodiment of the present invention, the holding member 610 presses the cooling tube 63 against the bottom surface of the developing unit 43, but the present invention is not limited to this. The holding member 610 may press the cooling tube 63 against the developing unit 43. For example, the holding member 610 may press the cooling tube 63 against the side surface of the developing unit 43.
　また、保持部材６１０が凹部６１１を有するが、本発明はこれに限定されない。保持部材６１０が冷却チューブ６３を現像部４３に押し当てればよい。例えば、保持部材６１０が平板状に形成されてもよい。この場合には、保持部材６１０を更に安価に製造できる。 Further, although the holding member 610 has the recess 611, the present invention is not limited to this. The holding member 610 may press the cooling tube 63 against the developing unit 43. For example, the holding member 610 may be formed in a flat plate shape. In this case, the holding member 610 can be manufactured at a lower cost.
　また、保持部材６１０が樹脂で形成されるが、本発明はこれに限定されない。保持部材６１０が冷却チューブ６３を現像部４３に押し当てればよい。保持部材６１０が金属で形成されてもよい。この場合には、現像部４３の熱を更に効率的に冷却液に伝達できる。 Further, although the holding member 610 is formed of resin, the present invention is not limited to this. The holding member 610 may press the cooling tube 63 against the developing unit 43. The holding member 610 may be made of metal. In this case, the heat of the developing unit 43 can be more efficiently transferred to the coolant.
　また、受熱部６１が２つの凹部６１１を有するが、本発明はこれに限定されない。受熱部６１が凹部を有すればよい。例えば、受熱部６１が１つの凹部だけを有してもよい。また、例えば、受熱部６１が３つ以上の凹部を有してもよい。 Moreover, although the heat receiving part 61 has the two recessed parts 611, this invention is not limited to this. The heat receiving part 61 should just have a recessed part. For example, the heat receiving part 61 may have only one recess. For example, the heat receiving part 61 may have three or more recessed parts.
　また、冷却ユニット６が４つの受熱部６１（受熱部６１ｋ、受熱部６１ｙ、受熱部６１ｍ及び受熱部６１ｃ）を備えるが、本発明はこれに限定されない。例えば、冷却ユニット６が１つの受熱部６１だけを有してもよい。具体的には、１つの受熱部６１が、４つの現像部４３を冷却する。この場合には、冷却ユニット６の構成を簡素化できる。１つの受熱部６１は、「１つの部材」の一例に相当する。また、例えば、冷却ユニット６が２つの受熱部６１だけを有してもよい。具体的には、２つの受熱部６１のうちの一方の受熱部６１が、２つの現像部４３を冷却し、２つの受熱部６１のうちの他方の受熱部６１が、他の２つの現像部４３を冷却する。 Moreover, although the cooling unit 6 includes the four heat receiving units 61 (the heat receiving unit 61k, the heat receiving unit 61y, the heat receiving unit 61m, and the heat receiving unit 61c), the present invention is not limited to this. For example, the cooling unit 6 may have only one heat receiving part 61. Specifically, one heat receiving unit 61 cools the four developing units 43. In this case, the configuration of the cooling unit 6 can be simplified. One heat receiving portion 61 corresponds to an example of “one member”. For example, the cooling unit 6 may have only two heat receiving parts 61. Specifically, one heat receiving part 61 of the two heat receiving parts 61 cools the two developing parts 43, and the other heat receiving part 61 of the two heat receiving parts 61 is the other two developing parts. 43 is cooled.
　以上、図面を参照しながら本発明の実施形態について説明した。ただし、本発明は、上記の実施形態に限られるものではなく、その要旨を逸脱しない範囲で種々の態様において実施することが可能である（例えば、下記に示す（１）～（２））。図面は、理解し易くするために、それぞれの構成要素を主体に模式的に示しており、図示された各構成要素の厚み、長さ、個数等は、図面作成の都合上から実際とは異なる場合がある。また、上記の実施形態で示す各構成要素の形状、寸法等は一例であって、特に限定されるものではなく、本発明の構成から実質的に逸脱しない範囲で種々の変更が可能である。 The embodiments of the present invention have been described above with reference to the drawings. However, the present invention is not limited to the above-described embodiment, and can be implemented in various modes without departing from the gist thereof (for example, (1) to (2) shown below). For ease of understanding, the drawings schematically show each component as a main component, and the thickness, length, number, etc. of each component shown in the drawings are different from the actual for convenience of drawing. There is a case. Moreover, the shape, dimension, etc. of each component shown by said embodiment are an example, Comprising: It does not specifically limit, A various change is possible in the range which does not deviate substantially from the structure of this invention.
　（１）図１及び図２を参照して説明したように、本発明の実施形態では、画像形成装置１００がカラー複合機であるが、本発明はこれに限定されない。画像形成装置が用紙Ｐに画像を形成すればよい。画像形成装置が、例えば、カラープリンターでもよい。また、画像形成装置が、例えば、モノクロ複写機でもよい。 (1) As described with reference to FIGS. 1 and 2, in the embodiment of the present invention, the image forming apparatus 100 is a color multifunction peripheral, but the present invention is not limited to this. The image forming apparatus may form an image on the paper P. The image forming apparatus may be a color printer, for example. The image forming apparatus may be a monochrome copying machine, for example.
　（２）図１～図３を参照して説明したように、本発明の実施形態では、冷却チューブ６３が、放熱部６２から送り出された冷却液を、受熱部６１ｋ、受熱部６１ｙ、受熱部６１ｍ及び受熱部６１ｃを経由して放熱部６２に戻すが、本発明はこれに限定されない。冷却チューブ６３が、放熱部６２から送り出された冷却液を、受熱部６１ｋ、受熱部６１ｙ、受熱部６１ｍ及び受熱部６１ｃのうちの少なくとも１つの受熱部６１を経由して放熱部６２に戻せばよい。 (2) As described with reference to FIGS. 1 to 3, in the embodiment of the present invention, the cooling tube 63 uses the cooling liquid sent out from the heat radiating unit 62 to receive the heat receiving unit 61k, the heat receiving unit 61y, and the heat receiving unit. Although it returns to the thermal radiation part 62 via 61m and the heat receiving part 61c, this invention is not limited to this. If the cooling tube 63 returns the coolant sent out from the heat radiating unit 62 to the heat radiating unit 62 via at least one of the heat receiving unit 61k, the heat receiving unit 61y, the heat receiving unit 61m, and the heat receiving unit 61c. Good.
　例えば、１本の冷却チューブ６３が、放熱部６２から送り出された冷却液を、受熱部６１ｋ及び受熱部６１ｙを経由して放熱部６２に戻し、他の１本の冷却チューブ６３が、放熱部６２から送り出された冷却液を、受熱部６１ｍ及び受熱部６１ｃを経由して放熱部６２に戻してもよい。 For example, one cooling tube 63 returns the cooling liquid sent out from the heat radiating unit 62 to the heat radiating unit 62 via the heat receiving unit 61k and the heat receiving unit 61y, and the other one cooling tube 63 is connected to the heat radiating unit. The coolant sent out from 62 may be returned to the heat radiating unit 62 via the heat receiving unit 61m and the heat receiving unit 61c.
　また、例えば、冷却チューブ６３が４本の冷却チューブ６３（第１冷却チューブ～第４冷却チューブ）で構成されてもよい。具体的には、第１冷却チューブは、放熱部６２から送り出された冷却液を、受熱部６１ｋを経由して放熱部６２に戻す。第２冷却チューブは、放熱部６２から送り出された冷却液を、受熱部６１ｙを経由して放熱部６２に戻す。第３冷却チューブは、放熱部６２から送り出された冷却液を、受熱部６１ｍを経由して放熱部６２に戻す。第４冷却チューブは、放熱部６２から送り出された冷却液を、受熱部６１ｃを経由して放熱部６２に戻す。 Further, for example, the cooling tube 63 may be composed of four cooling tubes 63 (first cooling tube to fourth cooling tube). Specifically, the first cooling tube returns the coolant sent out from the heat radiating unit 62 to the heat radiating unit 62 via the heat receiving unit 61k. The second cooling tube returns the coolant sent out from the heat radiating unit 62 to the heat radiating unit 62 via the heat receiving unit 61y. The third cooling tube returns the coolant sent out from the heat radiating unit 62 to the heat radiating unit 62 via the heat receiving unit 61m. The fourth cooling tube returns the coolant sent from the heat radiating part 62 to the heat radiating part 62 via the heat receiving part 61c.
　本発明は、画像形成装置の分野に利用可能である。
  The present invention can be used in the field of image forming apparatuses.

Claims (9)

  1. 　静電潜像が形成される像担持体と、
    　前記静電潜像にトナーを供給しトナー像を形成する現像器と、
    　前記現像器の熱を受熱する受熱部と、
    　前記受熱部が受熱した熱を放熱する放熱部と、
    　前記放熱部から送り出された冷却液を、前記受熱部を経由して前記放熱部に戻す冷却チューブと
    　を備え、
    　前記受熱部は、前記冷却チューブを前記現像器に押し当てる保持部材を有する、画像形成装置。     An image carrier on which an electrostatic latent image is formed;
    A developer for supplying toner to the electrostatic latent image to form a toner image;
    A heat receiving portion for receiving heat of the developing unit;
    A heat radiating part for radiating heat received by the heat receiving part;
    A cooling tube that returns the coolant sent out from the heat radiating unit to the heat radiating unit via the heat receiving unit, and
    The image forming apparatus, wherein the heat receiving unit includes a holding member that presses the cooling tube against the developing device.
  2. 　前記冷却チューブは、弾性を有する、請求項１に記載の画像形成装置。 The image forming apparatus according to claim 1, wherein the cooling tube has elasticity.
  3. 　前記冷却チューブは、樹脂で形成される、請求項１に記載の画像形成装置。 The image forming apparatus according to claim 1, wherein the cooling tube is formed of a resin.
  4. 　前記冷却チューブは、熱伝導性フィラーを含む、請求項３に記載の画像形成装置。 The image forming apparatus according to claim 3, wherein the cooling tube includes a thermally conductive filler.
  5. 　前記冷却チューブの熱伝導率は、１Ｗ／ｍＫ以上である、請求項１に記載の画像形成装置。 The image forming apparatus according to claim 1, wherein the cooling tube has a thermal conductivity of 1 W / mK or more.
  6. 　前記保持部材は、前記冷却チューブを位置決めする凹部を有する、請求項１に記載の画像形成装置。 2. The image forming apparatus according to claim 1, wherein the holding member has a recess for positioning the cooling tube.
  7. 　前記凹部の深さは、前記冷却チューブの外径の半分以上、且つ前記冷却チューブの外径の３／４以下である、請求項６に記載の画像形成装置。 The image forming apparatus according to claim 6, wherein the depth of the concave portion is not less than half of the outer diameter of the cooling tube and not more than 3/4 of the outer diameter of the cooling tube.
  8. 　前記保持部材は、樹脂で形成される、請求項１に記載の画像形成装置。 2. The image forming apparatus according to claim 1, wherein the holding member is formed of a resin.
  9. 　前記冷却チューブは、弾性を有する樹脂で形成され、
    　前記保持部材は、前記冷却チューブを位置決めする凹部を有し、
    　前記凹部の深さは、前記冷却チューブの外径の半分以上、且つ前記冷却チューブの外径の３／４以下であり、
    　前記冷却チューブは、前記保持部材により前記現像器に押し当てられて、長円状に変形している、請求項１に記載の画像形成装置。     The cooling tube is formed of an elastic resin,
    The holding member has a recess for positioning the cooling tube;
    The depth of the recess is not less than half of the outer diameter of the cooling tube and not more than 3/4 of the outer diameter of the cooling tube.
    The image forming apparatus according to claim 1, wherein the cooling tube is pressed against the developing device by the holding member and is deformed into an oval shape.
PCT/JP2019/006081 2018-04-12 2019-02-19 Image formation device WO2019198344A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018-076781 2018-04-12
JP2018076781 2018-04-12

Publications (1)

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WO2019198344A1 true WO2019198344A1 (en) 2019-10-17

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Citations (7)

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JP2005164927A (en) * 2003-12-02 2005-06-23 Canon Inc Image forming apparatus
US20060062703A1 (en) * 2004-09-21 2006-03-23 Samsung Electronics Co., Ltd. Automatic VOC concentration control apparatus and image forming apparatus having the same
JP2007024457A (en) * 2005-07-21 2007-02-01 Furukawa Sky Kk Cold plate
JP2008225456A (en) * 2007-02-15 2008-09-25 Kyocera Mita Corp Developing device and image forming apparatus
JP2008277684A (en) * 2007-05-07 2008-11-13 Ricoh Co Ltd Contact member, cooling device of electronic apparatus, electronic apparatus and image forming apparatus
JP2013232505A (en) * 2012-04-27 2013-11-14 Daikin Ind Ltd Attachment structure of refrigerant pipe

Patent Citations (7)

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Publication number Priority date Publication date Assignee Title
JP2004109868A (en) * 2002-09-20 2004-04-08 Ricoh Co Ltd Developer regulating member, developing device, process cartridge, and image forming apparatus
JP2005164927A (en) * 2003-12-02 2005-06-23 Canon Inc Image forming apparatus
US20060062703A1 (en) * 2004-09-21 2006-03-23 Samsung Electronics Co., Ltd. Automatic VOC concentration control apparatus and image forming apparatus having the same
JP2007024457A (en) * 2005-07-21 2007-02-01 Furukawa Sky Kk Cold plate
JP2008225456A (en) * 2007-02-15 2008-09-25 Kyocera Mita Corp Developing device and image forming apparatus
JP2008277684A (en) * 2007-05-07 2008-11-13 Ricoh Co Ltd Contact member, cooling device of electronic apparatus, electronic apparatus and image forming apparatus
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