Image forming device

Abstract

To provide a wiring holding fixture that can prevent the occurrence of electrostatic breakdown of an electrical component connected with a connector.SOLUTION: A wiring holding fixture has a sensor holder 401 as a first member and a harness holding member 46 as a second member attached to the sensor holder 401, and holds an electric wire 504 with the sensor holder 401 and the harness holding member 46. At least one of the sensor holder 401 and the harness holding member 46 is provided with a connector cover part that covers a connector 505 provided at one end of the electric wire 504.SELECTED DRAWING: Figure 22

Description

[Technical field]

[0001] The present invention , painting The present invention relates to an image forming apparatus. [Background technology]

[0003] In Patent Document 1, the above-mentioned wiring holder includes a fixing member as a first member fixed to a member, A second member, a holding member, is attached to the fixing member in a detachable manner, and electric wires, etc. are inserted inside the holding member. The device describes an inserted tube that is held by a fixing member and a holding member. Summary of the Invention [Problem to be solved by the invention]

[0005] When accessing the opening and closing parts, the opening and closing sensor When a finger or other object comes close to the Opening and closing Nsa Static electricity is discharged toward Open / Close Sensor There was a risk of electrostatic damage. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems, the present invention provides an image forming apparatus having an opening / closing member provided inside a main body of an image forming apparatus, an opening / closing sensor provided near the opening / closing member for detecting opening / closing of the opening / closing member, and a grounding member provided near the opening / closing member and facing the opening / closing sensor, the grounding member, the opening / closing sensor, and the opening / closing member being arranged in this order in a direction in which the opening / closing member in a closed state is accessed. The tip of the earth member protrudes toward the opening / closing member beyond the detection surface of the opening / closing sensor. It is characterized by the above. Effect of the Invention

[0007] According to the present invention, Open / Close Sensor This can prevent electrostatic damage from occurring. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is an external perspective view showing a copying machine according to an embodiment. [Diagram 2] FIG. 2 is a schematic diagram showing the internal configuration of the printer and paper feed / discharge device of the copier, as seen from the front side of the copier. [Diagram 3] FIG. 2 is a perspective view showing the fixing device and the transport and cooling unit. [Figure 4] FIG. 4 is a cross-sectional view showing the transport and cooling unit together with a sheet being transported. [Diagram 5] FIG. 4 is a partial perspective view showing the vicinity of a transport cooling unit of the paper transport section. [Figure 6] FIG. 4 is a front view of the vicinity of the transport cooling unit of the paper transport section with the intake duct removed. [Figure 7] FIG. 2 is a perspective view showing a state in which the paper transport unit is located at a storage position inside the printer, which is the device main body. [Figure 8] FIG. 4 is a perspective view showing a state in which the paper transport unit is pulled out to the pulled-out position. [Figure 9] FIG. 13 is a diagram illustrating a state in which the fixing upper cover is open with the paper transport unit located at the pulled-out position. [Figure 10] 1A is an enlarged perspective view of a main part of the paper transport unit with the upper fixation cover closed, and FIG. 1B is an enlarged perspective view of a main part of the paper transport unit with the upper fixation cover open. [Figure 11] FIG. 13 is a perspective view showing the vicinity of a conventional open / close sensor. [Figure 12] FIG. 2 is a front view of the harness holding member of the embodiment. [Figure 13] FIG. 4 is a perspective view of the harness holding member as viewed from below. [Figure 14] FIG. 4 is a cross-sectional perspective view showing a cross section of the mounting portion of the harness holding member; [Figure 15] FIG. 4 is a diagram showing a mounting groove for a sensor holder. [Figure 16] FIG. 4 is a perspective view showing the vicinity of the sensor holder with the harness holding member removed. [Figure 17] 13 is a rear perspective view showing how the harness holding member is attached to the attachment groove. FIG. [Figure 18] 13 is a front perspective view showing how the harness holding member is attached to the attachment groove; FIG. [Figure 19] 13 is a diagram showing the harness holding member being pushed downward to be attached to the attachment groove. FIG. [Figure 20] 13 is an enlarged front view of a main portion of the sensor holder with the harness holding member attached thereto; FIG. [Figure 21] FIG. 4 is a perspective view of the vicinity of a sensor holder to which a harness holding member is attached. [Figure 22] FIG. 4 is a front view of the sensor holder with the harness holding member attached thereto, as viewed from the rear side. [Figure 23] Cross section G-G of Figure 22. [Figure 24] 13 is a diagram showing an example in which there is almost no gap between the harness holding member and the outer edge of the exterior cover portion. FIG. [Diagram 25] FIG. 4A is a perspective view showing an earth plate and a sensor holder, and FIG. 4B is a perspective view showing the earth plate, the sensor holder, an open / close sensor, and a harness holding member. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] An embodiment in which the present invention is applied to a copying machine as an image forming apparatus will be described below.

[0010] First, a basic configuration of a copying machine according to an embodiment will be described. This copying machine forms images by electrophotography. A printer 1, a paper feed / discharge device 200, and a scanner 300 equipped with an automatic document feeder. , and an operation display unit 400.

[0011] The printer 1, which forms an image on a sheet of paper, includes an image forming section 2 and a paper transport section 1. 00. The paper transport unit 100 is an image forming unit of the printer 1 as shown in FIG. It is designed to slide relative to the main body including 2 and be pulled out from the main body.

[0012] In the figure, the copier is shown from the left front side. The arrow Re indicates the direction toward the front of the copier inside the copier. The arrow Ri indicates the direction toward the rear of the copier inside the machine. The arrow L indicates the direction toward the right side of the copier inside. 1 indicates the direction toward the left side of the copier.

[0013] FIG. 2 shows an outline of the internal configuration of the printer 1 and the paper feed / discharge device 200 of the copying machine. The printer 1 includes an image forming unit 2 for forming Y (yellow), M (maybe), and Y (yellow). Imaging unit 3Y for forming toner images of C (cyan), K (black), and C (chromium) , 3M, 3C, and 3K, which are arranged at a predetermined pitch in the left-right direction of the copier. The subscripts Y, M, C, and K added after the numerical symbols are Y, M, C, and K. This indicates that the material or device is for use in a product.

[0014] The image forming section 2 includes the imaging units 3Y, 3M, 3C, and 3K for Y, M, C, and K, as well as the The transfer unit 15 is disposed below these.

[0015] The Y, M, C, and K imaging units 3Y, 3M, 3C, and 3K use the same toner. Other than the difference in color, they have almost the same structure. The configuration of the imaging unit will be described using the imaging unit 3Y for this purpose as an example.

[0016] The Y imaging unit 3Y has a drum-shaped photoconductor 4Y. A charger 5Y, an exposure device 6Y, a developing device 7Y, and a drum cleaning device are disposed around the photoreceptor 1Y. He also has 8Y.

[0017] In the image forming unit 3Y, the photoconductor 4Y is rotated counterclockwise in the drawing, and is charged. At a position facing the charger 5Y, the peripheral surface is uniformly charged to the same polarity as the toner by the charger 5Y. After being uniformly charged, the surface of the photoconductor 4Y is modulated based on image information. The laser beam is then emitted from the exposure device 6Y, which performs optical scanning. The surface of the photoconductor 4Y attenuates the electric potential and carries an electrostatic latent image.

[0018] This electrostatic latent image is selectively coated with Y toner by the developing device 7Y, This Y toner image is developed into a Y toner image. As the photoconductor 4Y rotates, the Y toner image is transferred to the photoconductor 4Y. The Y enters a primary transfer nip for Y, which is formed by contact between the Y and an intermediate transfer belt 16, which will be described later.

[0019] The transfer unit 15 has an endless intermediate transfer belt 16, which is arranged inside the loop. The wire is stretched over multiple rollers, and the wire moves in the direction indicated by the arrow in the figure by rotating one of the rollers. Move endlessly in the direction of mark A.

[0020] Among the rollers arranged inside the loop of the intermediate transfer belt 16, the primary transfer roller for Y is The intermediate transfer belt 16 is sandwiched between the roller 17Y and the Y photoconductor 4Y. As a result, the primary transfer of Y is performed by contacting the Y photoconductor 4Y with the outer circumferential surface of the intermediate transfer belt 16. A loop is formed.

[0021] The primary transfer roller 17Y for Y is applied with a primary transfer bias having a polarity opposite to the charge polarity of the toner. As a result, the Y toner image on the Y photoconductor 4Y is transferred to the Y primary transfer nip. A primary transfer electric field is formed that electrostatically moves the toner from the photoconductor side to the belt surface side. The Y toner image on the photoconductor 4Y is transferred to the Y primary transfer nip by the primary transfer electric field and nip pressure. The toner image is primarily transferred onto the outer peripheral surface of the intermediate transfer belt 16 by the action of the toner image.

[0022] After passing through the Y primary transfer nip, the surface of the photoconductor 4Y is attached to the intermediate transfer belt 16. The residual toner that was not transferred to the next transfer is attached. This residual toner is removed by the drum cleaner. The toner particles are then removed from the surface of the photoreceptor 4Y by a cleaning device 8Y.

[0023] The imaging units 3M, 3C, and 3K for M, C, and K are also connected to the imaging unit 3Y for Y. By the same electrophotographic process, M toner images and C toner images are printed on the surfaces of the photoconductors 4M, 4C, and 4K. A black toner image and a black toner image are formed.

[0024] In addition to the primary transfer roller 17Y for Y, the intermediate transfer belt 16 also includes the primary transfer rollers 17Y for M, C, and K. Primary transfer rollers 17M, 17C, and 17K for M, C, and K are provided. The intermediate transfer belt 16 is sandwiched between the Y, 4M, 4C, and 4K. The outer circumferential surface of the transfer belt 16 comes into contact with the photoconductors 4M, 4C, and 4K for M, C, and K. The primary transfer nips for C and K are formed.

[0025] The Y toner image primarily transferred onto the outer peripheral surface of the intermediate transfer belt 16 is In the transfer nip, the M toner image, the C toner image, and the K toner image are sequentially superimposed and transferred. As a result, a four-color superimposed toner image is formed on the outer circumferential surface of the intermediate transfer belt 16. .

[0026] A secondary transfer roller 103 is disposed below the intermediate transfer belt 16. The intermediate transfer belt 16 is inserted between the intermediate transfer belt 16 and a secondary transfer opposing roller 18 disposed in the loop of the intermediate transfer belt 16. As a result, the intermediate transfer belt 16 is sandwiched between the outer circumferential surface of the secondary transfer roller 103. The secondary transfer nip is formed by the contact. A secondary transfer bias having the same polarity as the secondary transfer bias voltage is applied to the secondary transfer counter roller 18, which is electrically grounded. A secondary transfer electric field is formed between the transfer roller 103 and the photosensitive drum 102 .

[0027] The four-color superimposed toner image formed on the outer peripheral surface of the intermediate transfer belt 16 is As the endless movement of 16 progresses, it enters the secondary transfer nip.

[0028] The paper feed / discharge device 200 of the copier is provided below the paper transport unit 100 of the printer 1 with a paper feed bank. The paper feed bank 201 and the paper feed cassette 202 are The paper P is fed from the feed conveyor 203 to the feed conveyor 203. The sheet is conveyed upward by a plurality of conveying roller pairs. The paper feed unit 100 of the printer 1 is fed by a pair of delivery rollers 204 provided near the The paper is delivered into the paper path 101.

[0029] The paper P transferred from the supply conveying path 203 to the paper feed path 101 is arranged along the paper feed path 101. The paper is conveyed by a plurality of conveying roller pairs provided in the vicinity of the end of the paper feed path 101. The skew is corrected by hitting the registration nip of the pair of steer rollers 102. The registration roller pair 102 is rotated to rotate the four-color superimposed toner on the intermediate transfer belt 16. The toner image is then sent out toward the secondary transfer nip in synchronization with the toner image.

[0030] The paper P is brought into contact with the four-color superimposed toner image on the intermediate transfer belt 16 at the secondary transfer nip. The four-color superimposed toner image is secondarily transferred to the photosensitive drum by the action of the secondary transfer electric field and nip pressure. As a result, a full-color image is formed on the white paper P.

[0031] On the outer circumferential surface of the intermediate transfer belt 16 that has passed through the secondary transfer nip, there is a toner image that is not to be secondarily transferred to the paper P. The residual toner that was not transferred is removed by the belt cleaning device 19. The toner particles are removed from the intermediate transfer belt 16 by

[0032] The paper transport section 100 of the printer 1 includes a paper feed path 101, a pair of registration rollers 102, a secondary transfer roller 103, and a paper feed roller 104. In addition to the transfer roller 103, a post-transfer conveying path 104, a paper conveying belt unit 105, a fixing device 106, a conveying and cooling unit 110, etc.

[0033] The paper P that has passed through the secondary transfer nip is sent to a post-transfer conveyance path 104. The conveying path 104 includes a paper conveying belt unit 105, a fixing device 106, and a conveying and cooling unit. Via Route 110.

[0034] The paper P sent to the post-transfer conveying path 104 is first conveyed by the paper conveying belt unit 105. Therefore, after being conveyed from the right side to the left side of the copying machine, the sheet is sent into the fixing device 106 .

[0035] The fixing device 106 includes a fixing roller 106a containing a heat source such as a halogen lamp, and A fixing nip is formed by contact with the pressure roller 106b which is pressed toward the fixing device. The paper P fed into the fixing device 106 enters the fixing nip and is heated and pressurized. As a result, a full-color image is fixed onto the surface of the paper P.

[0036] After passing through the fixing device 106, the paper P passes through a conveying and cooling unit 110 and is then fed to a paper feed / ejection device. The feed is fed into the left end of the station 200.

[0037] At the left end of the paper feed / discharge device 200, there are a branch claw 205, a paper discharge path 206, and a pair of paper discharge rollers 207. , a return path 209, a switchback path 210, etc. are provided. A resupply path 211 is disposed above the paper feed bank 201 at 0.

[0038] From the conveying and cooling unit 110 of the paper conveying section 100 of the printer 1 to the left of the paper feed / discharge device 200 The paper P delivered to the side end is then transported to a different destination by a branching claw 205, which is a switching member. The single-sided mode forms an image on only one side of the paper P, and the double-sided mode forms an image on both sides of the paper P. When double-sided printing is completed in the double-sided mode, the paper P is conveyed to the second branch conveyor. The paper discharge path 206 is selected as the feed path. The paper P fed into the paper discharge path 206 is discharged from the paper discharge roller 206. After passing through the roller pair 207, the paper is discharged outside the machine and stacked on the stack tray 208. .

[0039] On the other hand, when one-sided printing is completed in the duplex mode, the first branch conveyor is used as the conveyor destination of the paper P. The return path 209 is selected as the path. The paper P fed to the return path 209 is After entering the switchback road 210, the vehicle is turned upside down by the switchback and enters the resupply road. Then, after passing through the re-supply path 211, the paper is sent back to the paper feed path 101. Then, a full-color image is transferred to the other side in the secondary transfer nip. Then, the fixing device 106, the conveying and cooling unit 110, the paper discharge path 206, and the paper discharge roller pair 207 are sequentially passed through the fixing device 106, the conveying and cooling unit 110, the paper discharge path 206, and the paper discharge roller pair 207. After the next stop, the passenger is ejected from the aircraft.

[0040] When the paper is discharged face down onto the stack tray 208, The return path 209 is selected. The paper P sent to the return path 209 is switched back. After entering Route 210, the plane was turned upside down by a switchback and ejected from the aircraft. do.

[0041] In addition, a registration exit sensor 130 detects the sheet P that has passed through the registration roller pair 102. and a fixing exit sensor 131 that detects the paper P that has passed through the fixing device 106.

[0042] The paper P that has passed through the fixing device 106 is at a high temperature. In recent years, when the paper P is conveyed while still hot, the image on the paper P may be damaged. Streaks and scratches caused by the load on the paper feeder, roller marks caused by transport, and paper P sticking to each other It is becoming easier to cause blocking phenomena.

[0043] The conveying and cooling unit 110 conveys the paper P sent out from the fixing device 106. It is used to cool the water.

[0044] FIG. 3 is a perspective view showing the fixing device 106 and the conveying and cooling unit 110. As indicated by the line arrow, the conveying and cooling unit 110 is disposed at the position where the fixing device 106 is discharged. The fixing device 106 is attached so that the paper can be cooled while being transported immediately after the fixing device 106. The fixing upper cover 106c on the downstream side of the fixing device 106 in the conveying direction is rotatable. By rotating the fixing upper cover 106c in the direction of the arrow A in the figure, the conveying direction of the fixing device 106 is changed. The downstream conveying path is exposed, and jammed paper in the fixing device 106 can be removed. .

[0045] 4 is a cross-sectional view showing the transport and cooling unit 110 together with the paper P being transported. The cooling unit 110 includes a driving roller 111 that rotates and a driven roller that is pressed against the driving roller. 112 forms a conveying nip, and the conveying nip is This provides a conveying force.

[0046] The conveying and cooling unit 110 includes an upper nip guide member 113, a sheet metal frame 119, The lower nip guide member 119d, the upper air blowing duct 115, and the lower air blowing duct 116 are provided in the The paper P immediately after being sent out from the fixing device 106 is guided by an upper nip guide. The guide member 113 is passed between the lower nip guide member 119d and the lower nip guide member 119d toward the conveying nip. To enter.

[0047] The upper air duct 115 as the first duct has a sheet discharge path 206 as a sheet transport path. The upper conveying path blowing outlet 21 serves as a first blowing outlet for blowing out air, and the second blowing outlet 22 serves as a conveying roller. A roller outlet 2 that faces the driven roller 112 and blows air toward the driven roller 112 2 is spaced apart by a predetermined distance in the width direction of the paper (also called the axial direction of the driven roller and the longitudinal direction of the duct). There are multiple units spaced apart.

[0048] The second duct, the lower air blowing duct 116, blows air toward the paper discharge path 206. A lower conveying passage outlet 41 is provided as a second outlet.

[0049] The cooling air sent to the upper air blowing passage 115d of the upper blowing duct 115 is directed as indicated by the arrow in the figure. As shown in FIG. 1G, air is blown from the upper conveying path blowing port 21 onto the upper surface of the paper P that has passed through the conveying nip. In addition, the cooling air sent to the lower air blowing passage 116d of the lower air blowing duct 116 is As shown by the arrow H in the figure, the air flows from the lower conveying path blowing port 41 through the conveying nip. The toner is blown onto the upper surface of the paper P. As a result, the paper P heated by the fixing device 106 is is cooled from

[0050] The sheet P on which the image has been fixed by the fixing device 106 is heated by the driven roller 11. The paper P is conveyed to the conveying nip between the conveying roller 2 and the driving roller 111. The roller 112 is passed to the driving roller 111 and the driven roller 112 is passed to the driving roller 111. When paper is fed continuously, the roller temperature rises relative to the paper temperature in the initial stage. Because the temperature is low, heat is exchanged from the paper to the roller pair, but the temperature of the roller pair gradually increases. The nipped paper P does not undergo heat exchange, and the paper is transported downstream while still at a high temperature. As a result, the cooling is achieved by blowing air from the upper air duct 115 and the lower air duct 116. If this happens, the temperature of the paper may not drop to the required temperature, resulting in a blocking phenomenon in which the paper P sticks to each other. There is a risk of causing an elephant.

[0051] In addition, when sheets are continuously fed, the surface temperatures of the driven roller 112 and the driving roller 111 become - The surface temperature of the roller may rise to a temperature close to the toner melting point. If the temperature rises to a level above this level, the toner on the paper may stick to the roller surface. In addition, if toner adheres to the surface of the roller, the paper that is transported will easily stick to the roller. The paper may wrap around the roller along the outer diameter of the roller, causing poor transport and paper jams inside the device. In particular, the driven roller 112 is connected to the fixing roller 10 which heats the paper. Since the surface of the contact side of the roller 6a is in contact with the contact side of the roller 6b, the temperature of the contact side of the roller 6a is more likely to rise than that of the driving roller 111. Furthermore, since the toner image immediately after fixing comes into contact with the driven roller 112, toner adhesion may occur. Easy to use.

[0052] However, in this embodiment, as shown by the arrow F in the figure, a driven air duct 115 is provided in the upper air duct 115. The roller outlet 22 facing the roller 112 is directed directly at the driven roller 112 at a short distance. By blowing cooling air through the rollers, the rollers can be cooled at all times. The temperature of the driven roller 112 increases and is cooled at the same time. This prevents the toner from sticking to the driven roller 112. Therefore, the conveyed paper can be prevented from being wrapped around the driven roller 112. can.

[0053] When no paper is passing through, the heat of the driving roller 111 is transferred to the driven roller 112. In addition, the heat of the driving roller 111 is transferred to the driven roller 112. As a result, the temperature of the driven roller 112 increases and is cooled at the same time. The temperature rise of the driving roller 111 is also suppressed, and the adhesion of toner to the surface of the driving roller 111 is also suppressed. This makes it possible to prevent the transported paper from wrapping around the driven roller 112.

[0054] Furthermore, the temperature rise of the driven roller 112 and the driving roller 111 can be suppressed. Therefore, heat exchange between the sheet P and the conveying nip is performed effectively, and the temperature of the sheet P can be lowered. This allows the air blown from the upper air blowing duct 115 and the lower air blowing duct 116 to be The cooling by the rollers can effectively lower the temperature of the paper to the target temperature, and the paper P is not taut. This makes it possible to suppress the occurrence of the blocking phenomenon in which the particles stick to each other.

[0055] The driven roller 112 may be a metal roller. When the material is metal, the thermal conductivity is higher than that of rubber, so the roller temperature tends to be higher. Therefore, by adopting a configuration in which the driven roller 112 is directly air-cooled as in this embodiment, This effectively suppresses the temperature rise of the driven roller 112 and improves the heat exchange with the paper P. It is also possible to effectively cool the paper P in the transport nip.

[0056] The driven roller 112 is made of a hollow filler material on whose surface toner does not easily adhere. The driven roller 112 may be made of a tubing made of a conductive material. It is preferable to make the surface of the driven roller 112 conductive, so that the roller is prevented from being charged. This has the added effect of

[0057] Furthermore, the driven roller 112 is made of, for example, a rubber material such as silicone, whose outer shape is made of a core metal. The toner is then covered with tubing made of a material that is difficult for toner to adhere to, such as PFA. In this case, the rubber member may be made conductive to dissipate static electricity generated when the paper is passed through. It is preferable to use a method of dropping the roller into a drain hole. This prevents the roller from becoming charged. In addition, the rubber part is made of a material such as PTFE that makes it difficult for toner to adhere to it. By including or coating the surface, tubing such as PFA can be omitted. The configuration can be such that:

[0058] In this embodiment, even when the paper P is not in the conveying and cooling unit 110, the upper conveying path blower Cooling air is blown from the outlet 21, the roller outlet 22, and the lower conveying path outlet 41. This effectively prevents the temperature of the driven roller 112 from increasing. Even when the paper P is not in the conveying and cooling unit 110, the upper conveying path air outlet 21 and the lower conveying path air outlet 22 are By continuing to blow cooling air from the transport path outlet 41, The air blown out from the discharge path 206 and the return path 209 of the discharge section 260 on the left side of the dashed line in the figure. 209, and the guide members and the conveying roller pairs of the paper discharge path 206 and the return path 209 can be cooled. do.

[0059] The upper conveying path blowing port 21 is an upper air blowing port that faces the upper surface of the paper P conveyed to the paper discharge path 206. The paper conveying direction of the upper paper guide surface portion 115b of the duct 115 (hereinafter, simply referred to as the conveying direction) ) and extends to the downstream end, and is further provided downstream in the conveying direction of the upper air blowing duct 115. The upper conveying passage outlet 115a extends downward to the downstream side wall portion 115f. The downstream end of the outlet 21 in the conveying direction is retracted from the upper paper guide surface portion 115b from the paper discharge path 206. As a result, the leading edge of the conveyed paper reaches the downstream end of the upper conveying path outlet 21 in the conveying direction. This prevents the product from getting caught, and reduces the occurrence of bent edges and poor transport. do.

[0060] In addition, the upper conveying passage outlet 21 is extended to the lower side of the downstream side wall portion 115f. In addition to the lower air duct 116 (arrow G2 in the figure), the paper discharge section 260 on the left side of the dashed line in the figure This allows the cooling air to be blown out toward the target (arrow G1 in the figure). Cool air can be blown onto the top surface of the paper, effectively lowering the temperature of the paper P. can.

[0061] Also, cooling air is directed toward the paper discharge path 206 and the return path 209 of the paper discharge unit 260 (arrow G1 in the figure). Since the air can be blown out, the guide members and conveying members of the paper discharge path 206 and the return path 209 can be smoothly The pair of feed rollers can be cooled, and the temperature rise in the paper discharge section 260 can be suppressed.

[0062] Similarly to the upper conveyance path outlet 21, the lower conveyance path outlet 41 also conveys the paper discharge path 206. The lower sheet guide surface 116a of the lower air blowing duct 116 facing the lower surface of the sheet P being fed The lower air blowing duct 116 is provided downstream in the conveying direction, extends to the downstream end in the conveying direction, and is further provided downstream of the lower air blowing duct 116. The lower conveying passage outlet 41 is extended to the upper side of the side wall portion 116c. The downstream end is located at a position retreated from the lower paper guide surface portion 116a and away from the paper discharge path 206. In this way, the leading edge of the paper sheet is prevented from being caught on the downstream end of the lower conveying path outlet 41 in the conveying direction. This makes it possible to prevent the edge from bending and conveying defects from occurring.

[0063] In addition, the lower conveying path outlet 41 is extended to the upper side of the downstream side wall portion 116c. In addition to the discharge path 206 (arrow H2 in the figure), the discharge path of the discharge unit 260 on the left side of the dashed line in the figure Cooled air can be blown out toward 206 or return path 209 (arrow H1 in the figure). As a result, part of the cooling air blown out from the lower conveying path outlet 41 is directed to the paper discharge path 206 and The paper can be guided toward the return path 209 by the guide members and conveyance of the paper discharge path 206 and the return path 209. The roller pair can be cooled well.

[0064] In this embodiment, as shown by the arrow F1 in FIG. Of the cooling air that is discharged, the air flows along the surface of the driven roller 112 toward the upstream side in the conveying direction. The cooling air can be blocked by the upper nip guide member 113. By suppressing the flow of the cooling air blown out from the cooling air outlet 22 into the fixing device 106, This makes it possible to suppress a drop in temperature of the fixing device 106 (fixing roller 106a), and This can suppress the occurrence of poor adhesion.

[0065] FIG. 5 shows a transport cooling unit 110 of the paper transport section 100 that can be pulled out from the printer 1. The frame 107c of the paper transport unit 100 has a structure for taking in outside air. The frame 107c is provided with an intake port 107b for absorbing air. The front side plate 107a is attached with a conveying cooling device 107 via a holding member 108. The intake duct 128 of the cooling unit 110 is fixed.

[0066] One end of the intake duct 128 is connected to the intake portion of the air supply fan 124. The other end of the duct 128 has an opening facing the intake port 107b of the frame 107c.

[0067] The intake duct 128 is a paper transport unit that can be pulled out from the printer 1 via the holding member 108. Since it is attached to the front side plate 107a of the feed unit 100, the paper transport unit 100 can be easily pulled out and It moves in the front and back directions of the copier following the pushing action.

[0068] During a print job on the printer 1, the paper transport unit 100 is pushed into the printer 1. When the air supply fan 124 rotates in this state, This suction force causes the outside air to flow into the frame 107 as shown by the dotted line in the figure. The air is sucked into the intake port 107b of the intake duct 128 and taken into the air supply fan 124. Then, the air is exhausted from the exhaust section of the air supply fan 124 and passes through the communication pipe 123. The air is then sent into the upper air duct 115 and the lower air duct 116 via the airflow.

[0069] FIG. 6 shows the paper transport section 100 with the transport cooling unit 110 removed. FIG.

[0070] The blower fan 124 is fixed to a fan holder 408. The fan holder 408 is The sensor holder 401 is fixed to the front side plate 1. The reference numeral 407 in FIG. 6 denotes a ground member made of metal. The plate has one end 407a connected to the front plate 107a, which is made of metal and is electrically grounded. As a result, the ground plate 407 is electrically connected to the front plate 107a via the front plate 107a. The details of the ground plate 407 will be described later.

[0071] FIG. 7 shows the paper transport unit 100 in a storage position inside the printer 1, which is the main body of the device. 8 is a perspective view showing a state in which the paper transport unit 100 is in an unstored position outside the printer 1. FIG. 13 is a perspective view showing a state in which the ink cartridge is pulled out to a pull-out position.

[0072] In this embodiment, the paper transport unit 100 is a printer 1 that includes a slide as a holding means. The roller 6 is provided so as to be slidable along the front-rear direction of the device. When a paper jam occurs in the device 106, the user opens the front cover 10 of the paper transport unit 100. The paper conveying section 100 having the fixing device 106 is grasped by gripping the handle 100b provided on the paper conveying section 100a. 7 to the front side of the printer 1. Pull the paper out to the maximum pull-out position and clear the paper jam. In the position, the user removes the fixing upper cover 106c of the fixing device 106 as shown in FIG. When the fixing upper cover 106c is opened, the fixing The upper conveying guide for the fixing device, which guides the paper that has passed through the nip, rotates together with the upper cover for the fixing device 106c. The fixing nip is opened to expose the paper transport path downstream of the fixing nip. After the paper jam is cleared, the user can After closing the fixing upper cover 106c, the paper transport unit 100 is pushed into the storage position shown in FIG. .

[0073] FIG. 10(a) is an enlarged view of the main part of the paper transport unit 100 with the fixing upper cover 106c closed. FIG. 10B is a perspective view of the paper conveying section with the fixing upper cover 106c open. FIG. 1 is an enlarged perspective view of a main portion of the sensor 100.

[0074] The front end of the fixing cover 106c is provided with a fixing device that is held by the user. The cover has a handle 106d for opening and closing the cover. An open / close sensor 403 consisting of a reflective optical sensor for detecting the open / close of the sensor c is attached to the sensor holder. It is attached to 401.

[0075] As shown in FIG. 10(a), when the fixing upper cover 106c is closed, the cover can be removed. The grip portion 106d is adjacent to and faces the open / close sensor 403. Light (for example, infrared light) from the light emitting portion is reflected by the cover handle portion 106d, and the reflected light The light is received by the light receiving portion of the open / close sensor 403. It is detected to be in the closed position.

[0076] As shown in FIG. 10(b), the user holds the cover handle 106d to close the fixing upper cover. When the cover 106c is opened, the cover handle 106d does not face the open / close sensor 403. As a result, the light from the light emitting portion of the open / close sensor 403 is not received by the light receiving portion. It is detected that the fixing upper cover 106c is open (not closed).

[0077] With the fixing upper cover 106c open, the paper transport unit 100 is stored inside the printer 1. When the printer 1 is pushed into the position, the fixing upper cover 106c is inserted into the exterior cover 1a of the printer 1 shown in FIG. If the fixing upper cover 106c hits the fixing upper cover 106, A shear force is applied to the fixing upper cover 106c, and the fixing upper cover 106c may be plastically deformed. In this embodiment, the paper conveying unit 100 has a fixing upper cover 106c that is not completely closed (half-open). In this manner, the fixing upper cover 106c can be stored in the storage position even in the closed state. If the cover is not completely closed (half-open), the cover is not attached to the upper cover 106c. The upper fuser conveying guide is not in the paper guide position. If the 06c is not completely closed (half-open) and an image is formed, the fixing nip is removed. The paper cannot be guided properly, which may cause a paper jam.

[0078] Therefore, in this embodiment, the opening / closing sensor detects that the fixing upper cover 106c is not closed. When the sensor 403 detects the fixing device, the operation display unit 400 indicates that the fixing device upper cover 106c is open. The user is not allowed to close the paper conveying section 106c without closing the fixing upper cover 106c. This prevents the printer 100 from being pushed into a storage position inside the printer 1. If the open / close sensor 403 detects that the fixing upper cover 106c is not closed, When the fixing nip is in the ON position, image formation is disabled and the paper that has passed through the fixing nip is not guided and used. This prevents paper jams from occurring.

[0079] Also, for example, the open / close sensor 403 detects that the fixing upper cover 106c is not closed. When this is detected, the paper transport unit 100 cannot be pushed into the storage position inside the printer 1. This can be used to prevent the user from seeing that the upper cover 106c is not closed. In this state, the paper transport unit 100 is pushed into the storage position inside the printer 1. It can be prevented.

[0080] FIG. 11 shows the vicinity of an open / close sensor 403 to which a conventional harness holding member 502 is attached. FIG.

[0081] The open / close sensor 403 includes a sensor unit 403a having a light emitting unit and a light receiving unit, and a The substrate 403b has a connection terminal provided at one end of the substrate 403b. A connector 505 of the harness 500 is connected to 403c.

[0082] The sensor holder 401 also includes a harness 500 for holding a plurality of electric wires 504. A harness holding member 502 is attached to the harness holder 502. A plurality of electric wires 504 are attached to the harness holder 502. The sensor holder 401 is inserted into the holding hole of the fixing device 106 and held therein. It is wired to the opposite side.

[0083] In FIG. 11, the wires 504 and the connector 505 of the harness 500 are exposed. The open / close sensor 403 is configured to detect the cover handle 106d operated by the user. , is disposed near the cover handle portion 106d. As a result, the connection terminal of the open / close sensor 403 The connector 505 connected to the cover 403c is also disposed near the cover handle 106d. The cover handle 106d is a grip that the user can hold when opening and closing the upper cover 106c. Therefore, when the user holds the cover handle 106d, the fixing upper cover 10 When opening and closing the harness 500, the user's fingers may get caught in the wire 504 of the harness 500. When the caught electric wire 504 is removed from the finger, the electric wire 504 is pulled. Otherwise, the electric wire 504 may come off the connector 505, and the harness 500 may be damaged. In addition, when removing the caught electric wire 504 from the finger, the electric wire 504 is pulled and the The connector 505 may come off the connection terminal 403c of the open / close sensor 403, causing a break or partial disconnection. This may cause a false detection by the open / close sensor 403 due to a poor connection. be.

[0084] In addition, the user can access the cover handle 106d to open and close the fixing upper cover 106c. When the user touches the connector 505, the user's finger approaches the connector 505. There is a risk of static electricity being discharged toward the wire insertion hole 505a of the wire insertion hole 505a. The static electricity discharged toward the sensor 403 passes through the connector 505 and There is a risk of electrostatic damage to the sensor 403.

[0085] To prevent static electricity from being discharged to the connector 505 and to prevent the electric wire 504 from getting caught, It is also possible to provide a separate cover member for covering the electric wire 504 and the connector 505 of the sensor 500. However, the increased number of parts increases the cost of the device, and the increased assembly man-hours increase the manufacturing cost. This could lead to a shutdown.

[0086] Therefore, in this embodiment, the connector 505 and the electric wires of the harness 500 are attached to the harness holding member. A cover portion is provided to cover 504. The features of this embodiment will be specifically described below. .

[0087] FIG. 12 is a front view of the harness holding member 46 of this embodiment, and FIG. FIG. 14 is a perspective view of the harness holding member 46 as viewed from below. 4 is a cross-sectional perspective view showing a cross section of a mounting portion 46a.

[0088] The harness holding member 46, which is the second member in this embodiment, is made up of a mounting portion 46a and a cover portion 46 The mounting portion 46a is provided on the upper portion of the sensor holder 401, which is the first member. The mounting groove 401b (see FIG. 15) is attached to the mounting groove 401b. The cover portion 46b holds the electric wires 504 of the harness 500. The electric wire 504 and the connector 505 located closer to the fixing device 106 than the sensor holder 401 of It covers the following:

[0089] The cover portion 46b includes a harness cover portion 46b1, an electric wire guide portion 46b2, and an over The harness cover portion 46b1 is provided with a wrap portion 46b3. The cover 505 and the electric wire 504 located on the fixing device 106 side of the sensor holder 401 are covered. It is something.

[0090] The wire guide portion 46b2 covers the wires 504 of the harness 500 and is connected to the mounting portion 4 The wire guide portion 46b2 guides the wire 504 into the wire holding groove 46a1 of the wire guide portion 46b2. The surface is an inclined surface that approaches the mounting portion 46a as it moves away from the connector 505. One end of the wire holder 46 is connected to the harness cover 46b1, and the other end of the wire holder 46 is connected to the wire holder 46a1. It is connected to the side wall opposite the open / close sensor side.

[0091] The overlapping portion 46b3 is a part of the sensor upper cover portion 401a of the sensor holder 401. (see FIG. 16) and faces connector 505 from above. It covers a part of the heater 505 from above.

[0092] The mounting portion 46a is provided with a wire holding groove 46a1 and a A pair of locking claws 46a2 are provided facing each other in the front-rear direction, and the harness holding member 46 A pair of fastening portions 46a3 (see FIG. 13) for fastening the sensor holder 401 in the front-rear direction; It has.

[0093] The electric wire holding groove 46a1 is a rectangular groove that is open at the front, rear, and bottom. The electric wire 504 is inserted in the front-rear direction. The electric wire 504 is inserted in the mounting groove 401b and the electric wire holding groove. 46a1 and 46a2.

[0094] As shown in FIG. 14, the pair of locking claws 46a2 are inserted into the electric wire holding grooves 46a1. The shape extends parallel to the left and right in the direction of separation, then extends diagonally upward. The tip is elastically deformable in the left and right directions.

[0095] As shown in FIGS. 13 and 14, the pair of stoppers 46a3 surrounds the locking claws 46a2. When the mounting portion 46a is attached to the mounting groove 401b, The edge of the mounting groove 401b fits between a pair of opposing stoppers 46a3. The harness holding member 46 is fixed to the sensor holder 401 by a pair of fastening portions 46a3. Can be stopped forwards and backwards.

[0096] FIG. 15 is a diagram showing the mounting groove 401b of the sensor holder 401. As shown in FIG.

[0097] The mounting groove 401b is a rectangular groove that is open at the front, rear, and top. The upper end of the mounting groove 401b is provided with a locking projection 401c. The portion 401f has an R-shape.

[0098] FIG. 16 is a perspective view showing the sensor holder and its surroundings with the harness holding member 46 removed. be.

[0099] The sensor holder 401 faces the open / close sensor 403 and the connector 505 from above. The sensor upper cover part 401a covers the sensor 403 and the connector 505 from above. The sensor holder 401 faces the open / close sensor 403 and the connector 505 from below. Then, the sensor lower cover part 401d that covers the open / close sensor 403 and the connector 505 from below is The sensor lower cover portion 401d extends to the mounting groove 401b. A plurality of electric wires 504 located on the fixing device side (rear side) of the holder 401 are also arranged facing each other from below. There are.

[0100] In addition, the sensor holder 401 is provided with a plurality of fixing guide ribs 401e. The upper end of the fixing guide rib 401e is connected to the sensor lower cover portion 401d, and the lower As the sensor holder 401 moves to the front, the sensor holder 401 is positioned closer to the front (the amount of protrusion from the side wall decreases). The axis is tilted so that the

[0101] The fixing device 106 is detachable from the paper transport section 100. When replacing the paper feed unit 100, first pull it out from the printer 1, then insert it as shown by the arrow E in the figure. Lift the fixing device 106 up from the paper transport section 100 and remove it from the paper transport section 100. Then, the new fixing device 106 is lowered into the paper transport section 100.

[0102] In this embodiment, when the fixing device 106 is removed from the paper transport section 100, 6 is guided in a direction away from the open / close sensor 403 by the fixing guide rib 401e. This allows the fixing device 106 to be removed from the paper transport section 100. , it is possible to prevent the opening / closing sensor 403 and the connector 505 from colliding with each other. 03 and the connector 505 from being subjected to external damage, 3 and connector 505 can be prevented from being damaged.

[0103] When the fixing device 106 is removed from the paper transport section 100, the fixing guide rib 401e Even if a member of the fixing device 106 gets between the sensor cover part and the fixing device 106, the member is 401d, and does not collide with the open / close sensor 403 or the connector 505. This further suppresses external damage to the open / close sensor 403 and the connector 505. It is possible.

[0104] Furthermore, in this embodiment, the sensor lower cover part 401d is fixed to the sensor holder 401. The wires 504 located on the fixing device side (rear side) are also covered from below. When the fixing device 106 is removed from the paper transport section 100, the components of the fixing device 106 may be pulled out of the harness. 500 from being caught on the multiple electric wires 504 located on the fixing device side (rear side) of the fixing device 500 from below. This prevents damage to the harness due to external load on the electric wire 504 and prevents damage to the connector 505. This can prevent the open / close sensor 403 from being disconnected.

[0105] In addition, since the sensor cover portion 401a is provided, the fixing device 106 can be easily mounted on the paper conveying portion 10. When the fixing device 10 is lowered into the fixing device holder 500, the opening / closing sensor 403 and the connector 505 are connected from above. This prevents the fixing device 106 from colliding with the paper transport section 100. When inserting the connector 505, external damage to the open / close sensor 403 and the connector 505 is prevented. Therefore, damage to the open / close sensor 403 and the connector 505 can be prevented. .

[0106] In this embodiment, the connector 505 on the upper surface of the sensor lower cover portion 401d and the opening and closing A number of ribs are provided at the location facing the sensor 403. The gap between the cover part 401d and the open / close sensor 403 and the gap between the sensor lower cover part 401d and the connector 50 This prevents fingers or other objects from getting stuck in the gap between 5.

[0107] Next, the mounting groove 401b of the sensor holder 401 of the harness holding member 46 of this embodiment This section explains how to attach the device to the hub.

[0108] FIG. 17 shows the harness holding member 46 being attached to the attachment groove 401b from the rear side (fixed position). FIG. 18 is a perspective view of the harness holding member 46 in the mounting groove 4. This is a front perspective view showing how to attach it to 01b.

[0109] The harness holding member 46 of this embodiment is an outer cover that fits under the sensor upper cover portion 401a. Therefore, the harness is inserted from directly above the mounting groove 401b. Even if an attempt is made to attach the support member 46 to the attachment groove 401b, the overlapping portion 46b 3 abuts against the sensor upper cover portion 401a, and the harness holding member 46 is attached to the mounting groove 401 Cannot be attached to b.

[0110] Therefore, in this embodiment, as shown by the arrow B in the figure, the upper part is located behind the lower part. In this state, the harness holding member 46 is tilted and then pulled from the rear. Specifically, the harness holding member 46 is inserted into the mounting groove 401b while being inclined. The upper end of the edge of the mounting groove 401b is fitted to a pair of fastening portions 46a3 (see FIG. 13), insert the harness holding member 46 into the mounting groove 401b.

[0111] The upper end 401f of the mounting groove 401b is rounded. Even if the member 46 is slightly misaligned to the left or right with respect to the mounting groove 401b, the harness can be held. The member 46 is guided by the R-shape of the upper end 401f of the mounting groove 401b, and the harness holding member 4 6 can be inserted into the mounting groove 401b.

[0112] When the harness holding member 46 is inserted into the mounting groove 401b, the inclined surface of the locking claw portion 46a2 46a4 (see FIG. 14) comes into contact with the upper end of the locking projection 401c of the mounting groove 401b. In this way, when the locking claw portion 46a2 comes into contact with the locking projection 401c, the harness holding member 46 Stand up.

[0113] In this embodiment, as shown in FIG. 18, the locking claw portion 46b3 is The distance L2 from the lower end of the sensor upper cover portion 401a to the lower end of the locking projection 40 1c. When the sensor is raised upright, the overlapping portion 46b3 enters under the sensor upper cover portion 401a. nothing.

[0114] After the harness holding member 46 is raised, the harness holding member 46 is pushed downward to The holder 46 is attached to the mounting groove 401b.

[0115] FIG. 19 shows the harness holding member 46 being pushed downward to be attached to the mounting groove 401b. FIG.

[0116] As shown by the arrow F in FIG. 19, when the harness holding member 46 is pressed downward, a pair of locking members The claw portion 46a2 is pressed by the locking projection 401c and elastically deforms in the direction of the arrow K1 in the figure. The wall portion of the mounting portion 46a on the open / close sensor 403 side is engaged with the locking claw portion 46a2 by the locking projection 401c. When the mounting portion 46a is pressed against the mounting member 46, the mounting portion 46a is elastically deformed in the direction of the arrow K2 in the figure. The wall portion on the opposite side to the sensor 403 side is connected to the electric wire guide portion 46b2. The wall portion on the sensor 403 side is more rigid than the wall portion on the sensor 403 side. The wall on the opposite side to side 3 does not elastically deform.

[0117] The locking claws 46a2 and the wall of the mounting portion 46a on the open / close sensor 403 side are elastically deformed. As a result, the locking claw portion 46a2 climbs over the locking protrusion 401c, and the locking claw portion 46a2 As a result, the locking claw portion 46a2 is located below the locking protrusion 401c. and the harness holding member 46 is attached to the attachment groove 401b.

[0118] FIG. 20 shows a main part of the sensor holder 401 with the harness holding member 46 attached, as viewed from the front side. FIG.

[0119] The electric wires 504 of the harness 500 are surrounded by the mounting portion 46a and the mounting groove 401b. It is inserted into the convex space and held by the mounting portion 46a and the mounting groove 401b. That is, in this embodiment, the sensor holder 401 and the harness holding member 46 are It functions as a wiring holder to hold 4.

[0120] In this embodiment, the groove depth of the mounting groove 401b is set to the mounting portion of the harness holding member 46. 20, the mounting groove 401 is deeper than the height of the mounting groove 401. A predetermined gap S is formed between the bottom of b and the mounting portion 46a.

[0121] As shown in FIG. 16 and FIG. 17, the wire 504 of the harness 500 is arranged to straddle the mounting groove 401b. In this state, the harness holding member 46 is attached to the attachment groove 401b. When the harness holding member 46a is in contact with the bottom of the mounting groove 401b, When the electric wire 504 is attached to the mounting groove 401b, the electric wire 504 is attached to the bottom of the mounting groove 401b. If the wire is caught between the mounting portion 46a and the wire, there is a risk of the wire being broken. Carefully insert the harness holder 504 into the wire holder groove 46a1. 46 must be attached to the mounting groove 401b, which makes assembly work less efficient.

[0122] In contrast, in this embodiment, the space between the bottom of the mounting groove 401b and the mounting portion 46a Since a predetermined gap S is formed in the mounting groove 401b, the electric wire 504 is The wire is not pinched between the wire portion 46a and the mounting portion 46b, and the occurrence of disconnection can be prevented. The harness holding member 46 is removed without paying attention to the fact that the electric wire 504 is in the electric wire holding groove 46a1. The mounting groove 401b can be used to mount the sensor, improving the ease of assembly. The wire 504 to be placed is attached to the harness holding member 46 after the harness holding member 46 is attached to the mounting groove 401b. It is sufficient to insert it into the wire holding groove 46a1.

[0123] In this embodiment, the distance from the connector 505 increases as the distance from the connector 505 increases. The wire guide portion 46b2 is inclined toward the sensor holder 401. The rear electric wire 504 is smoothly bent by the electric wire guide portion 46b2, and a gentle curve is formed. The bend allows the electric wire 504 to be routed into the electric wire retaining groove 46a1.

[0124] In addition, the upper portion of the locking claw portion 46a2 is positioned in a direction away from the electric wire holding groove 46a1 compared to the lower portion. Therefore, the harness holding member 46 is inclined so that the harness holding member 46 can be easily mounted. When the cartridge is removed from the groove 401b, the locking claw portion 46a2 is pressed by the locking projection 401c. The tip of the locking protrusion 401c is positioned toward the base side of the locking protrusion 401c (away from the electric wire holding groove 46a1). Therefore, the harness holding member 46 is elastically deformed after being attached to the attachment groove 401b. does not come off easily.

[0125] In this embodiment, a wall on the opposite side to the open / close sensor 403 side of the mounting portion 46a is electrically connected to the wall. The wire guide portion 46b2 is connected to the mounting portion 46a on the opposite side to the open / close sensor 403 side. This structure makes it difficult for the wall of the harness to be elastically deformed. The support member 46 is configured so as not to easily come off the mounting groove 401b.

[0126] In this manner, in this embodiment, the harness holding member 46 can be easily attached to the mounting groove 401b. Therefore, when clearing a jam, the harness holding member 4 When an external force is suddenly applied to the harness holding member 6 in a direction that causes it to come out of the mounting groove 401b, Therefore, the harness holding member 46 can be prevented from coming off the mounting groove 401b. 46 from coming off the mounting groove 401b and losing the harness holding member 46. In addition, when the removed harness holding member 46 is reassembled into the mounting groove 401b, When a finger approaches the connector 505, static electricity is discharged from the finger to the connector 505, and the open / close sensor 40 3 can be prevented from being damaged by electrostatic discharge.

[0127] FIG. 21 is a perspective view of the sensor holder 401 to which the harness holding member 46 is attached. 22 is a front view of the sensor holder 401 to which the harness holding member 46 is attached, as viewed from the rear side. 23 is a cross-sectional view taken along line GG of FIG.

[0128] As shown in FIG. 21 to FIG. 23, the harness cover portion 46b1 and the wire guide portion 46b2 , the connector 505 of the harness 500 and the electric wire 50 located behind the sensor holder 401 4 from the side, and the side of the part of the harness 500 behind the sensor holder 401 is left with no gap. It covers it incessantly.

[0129] As shown in FIG. 21, the cover portion 46b of the harness holding member 46 is 6b4, which covers the electric wires 504 from above. The cover portion 46b has an overlap portion 46b3 that is one step lower than the upper cover portion 46b4. The tip side of the overlapping portion 46b3 is inserted under the sensor upper cover portion 401a. As a result, the harness 500 is attached to the upper side of the rear side of the sensor holder 401. However, the upper cover portion 46b4, the overlap portion 46b3, and the sensor upper cover portion 401a The lower part of the rear side of the harness 500 from the sensor holder 401 is The sensor is completely covered by the sensor lower cover portion 401d.

[0130] The connector 505 is covered by the sensor holder 401 in the top and bottom directions and the front, and the rear is covered by the harness. As a result, the sensor holder 401 and the harness holding member 46 are covered with the sensor holder 401. As a result, the connector 505 is covered on all four sides. You can block access to 505.

[0131] In addition, the electric wire 504 located behind the sensor holder 401 is also attached to the harness holding member 46. By covering the sensor holder 401, it is possible to prevent access to the electric wire 504 located behind the sensor holder 401. can also be prevented.

[0132] This allows the user to use the cover handle 106d to open or close the upper cover 106c. When accessing, the user's fingers may come into contact with the wires 504 and the connector 505 of the harness 500. This prevents the user's fingers from getting caught on the wire 504 and causing the connector to break. This can prevent the wire 504 from coming off the connector 505 and damaging the harness 500. This can prevent disconnection of the connector 505 from the open / close sensor 403. This can prevent poor connection due to a semi-connected state, and can prevent erroneous detection by the open / close sensor 403. can.

[0133] In addition, the connector 505 is covered by the sensor holder 401 and the harness holding member 46. This prevents static electricity from being discharged toward the wire insertion hole 505a of the connector 505. This can prevent electrostatic damage to the closed sensor 403.

[0134] Furthermore, a member for holding the electric wires 504 of the harness 500 (in this embodiment, the first member In addition to the sensor holder 401 and the harness holding member 46 (the second member), the harness 500 The number of parts is reduced compared to when a cover member is provided to cover the electric wire 504 and the connector 505. This allows the cost of the device to be reduced. By simply assembling the harness 500 to the harness holder 401, the harness 500 can be secured to the harness 504. The cover 402 covers the rear portion of the sensor holder 401, and covers the wires and connectors of the harness 500. Compared to the case where a cover member for covering 505 is provided, the number of assembly steps can be reduced. .

[0135] The harness holding member 46 has an overlapping portion that overlaps the sensor upper cover portion 401a. When the cover portion 46b3 is not provided, the sensor upper cover portion 401a and the cover of the harness holding member 46 are As a result, a tool such as a screwdriver may be inserted through the gap. When the tool approaches the connector 505, static electricity is applied from the tool to the wire insertion hole 505a of the connector 505. may be discharged, causing electrostatic damage to the open / close sensor 403.

[0136] However, in this embodiment, since the overlapping portion 46b3 is provided, the sensor upper cover Therefore, a tool cannot approach the connector 505 between the connector portion 401a and the cover portion 46b. Therefore, discharge of static electricity into the electric wire insertion hole 505a of the connector 505 can be further prevented, The closed sensor 403 can further suppress electrostatic damage.

[0137] In this embodiment, the overlap portion 46b3 of the harness holding member 46 is a sensor upper cover. The sensor upper cover part 401a is overlapped from below, but the mounting groove 40 of the sensor upper cover part 401a The end of the harness holder 46 on the side of the sensor 1b is lowered by one step, and the overlapping portion 46b3 of the harness holder 46 is It may be configured so as to overlap the upper cover portion 401a.

[0138] As shown in FIG. 23, the open / close sensors 403 are provided at predetermined intervals in the vertical direction. Two pairs of mounting claws 403d are provided at a predetermined interval in the left-right direction. The sensor holder 401 is provided with a certain distance in the left-right direction and has two sensors that are long in the up-down direction. Each pair of mounting claws 403d is provided with a sensor mounting hole 401h. Insert the tip of the upper mounting claw 403d into the sensor mounting hole 401h. Hook the lower mounting claw 403d onto the upper end of the sensor mounting hole 401h, and The open / close sensor 403 is attached to the sensor holder 401 by hooking it onto the lower end of the hole 401h. Can be attached.

[0139] In addition, the reference numeral 401g in FIG. 22 denotes a facing portion of a ground plate 407 which is a ground member to be described later. 21 is a through hole through which the front cover 100 is inserted. a (see FIG. 7) and a cover 100c for covering the space between the front plate 107a. The transport upper cover portion 100c is provided on the front cover 100a.

[0140] At a location of the conveying cover part 100c facing the sensor cover part 401a, The outer edge 100d is not present, and the front portion of the sensor upper cover portion 401a is the conveyor upper cover portion 100c. The upper side of the harness holding member 46 is inserted under the upper cover portion 100. c and faces the outer edge 100d.

[0141] In the configuration shown in FIG. 21, the harness holding member 46 and the outer edge of the transport cover portion 100c 100d. In this embodiment, as shown in FIG. An upper air duct 115 and a lower air duct 116 are provided between the front cover 100a (see FIG. 7) and the front side plate 107a. A mechanism for sending air into the air supply duct 116 (air supply fan 124 and air intake duct 128) The harness holding member 46 and the outer edge portion 100d of the upper cover portion 100c are provided. If there is a certain gap between them, air will leak out or get in through that gap, This generates unintended pressure loss, and the intended air is blown into the upper air duct 115 and the lower air duct 116. There is a risk that not enough air will be delivered.

[0142] For example, as shown in FIG. 24, the harness holding member 46 and the transport cover portion 10 It is preferable to have a structure in which there is almost no gap between the outer edge 100d of the 0c. Due to a difference or the like, the position of the outer edge 100d of the transport cover part 100c is behind the target position. When the harness holder 46 is pulled toward the rear end, the outer edge 100d of the upper cover portion 100c of the conveying member 46 is pulled toward the rear end. Therefore, the harness holding member 46 is pushed in the direction of the arrow J in FIG. It is preferable that the harness holding member 46 is configured to be elastically deformable. When the harness holding member 46 is pressed rearward by the outer edge portion 100d of the portion 100c, The harness holder 46 is elastically deformed in the direction of the arrow J, and the portion facing the outer edge portion 100d of the harness holder 46 is This allows the harness holder 46 to move to the side and escape. It is possible.

[0143] In addition, the distance between the pair of stoppers 46a3 shown in FIG. 13 may be adjusted according to the mounting method. The length of the groove 401b is longer than the thickness of the edge of the groove 401b, so that the harness holding member 46 can extend in the front-rear direction within a predetermined range. It may be configured so that it is movably attached to the attachment groove 401b. However, the position of the outer edge 100d of the transport cover portion 100c is closer to the rear than the target position. Then, the outer edge 100d of the upper transport cover portion 100c pushes the harness holding member 46 rearward. When the harness holder 46 is attached, the harness holder 46 slides rearward, which may cause damage to the harness holder 46. It can be prevented.

[0144] In FIG. 24, the portion of the conveying cover portion 100c facing the harness holding member 46 is 46 and the outer edge 100d of the upper conveying cover 100c. The space between the harness holder 46 and the carrier is narrowed, but the harness holder 46 is extended forward. The gap between the upper cover portion 100c and the outer edge portion 100d may be narrowed.

[0145] In addition, the outer edge 100d of the portion of the transport cover 100c facing the harness holding member 46 The rear portion of the upper transport cover portion 100c is connected to the front portion of the harness holding member 46 from above. The gap between the harness holding member 46 and the upper transport cover portion 100c is narrowed so that the harness holding member 46 overlaps the upper transport cover portion 100c. With this configuration, the position of the outer edge 100d of the transport cover portion 100c may be Even if the cover portion 100c is moved rearward from the target position, the harness holding member 4 There is no pressing 6.

[0146] Next, the details of the ground plate 407 shown in FIG. 6 will be described.

[0147] The open / close sensor 403 is an optical sensor as described above, and detects the reflection from the cover handle 106d. Since the opening and closing of the fixing upper cover 106c is detected by detecting the incident light, the fixing upper cover 106c cannot be covered by a cover. As a result, when the user accesses the cover handle portion 106d, the user's finger is When a finger approaches the open / close sensor 403, static electricity is discharged from the finger toward the open / close sensor 403. There is a risk of electrostatic damage to the sensor 403.

[0148] In order to prevent such discharge of static electricity to the open / close sensor 403, the earth plate 407 is It has been established.

[0149] FIG. 25(a) is a perspective view showing the ground plate 407 and the sensor holder 401. 5(b) shows the ground plate 407, the sensor holder 401, the open / close sensor 403 and the harness holder. 4 is a perspective view showing a support member 46. FIG.

[0150] The earth plate 407, which is an earth member, has a through hole 401g provided in the sensor holder 401. Two opposing parts 407b are provided to penetrate the opening and closing sensor 403 from above. As shown in FIG. 25(b), the tip of the facing portion 407b is in contact with the opening and closing sensor in the front-rear direction. The detection surface H of the sensor portion 403 a of the sensor 403 is located at the same position.

[0151] Usually, the user accesses the cover handle 106d from above. When the user accesses the cover handle 106d, the user's finger is pushed by the open / close sensor 403. The opening and closing sensor 403 is located above the facing portion 407b of the earth plate 407. As a result, static electricity is discharged from the finger to the facing portion 407b of the earth plate 407. After the static electricity is removed by the earth plate 407, the finger approaches the open / close sensor 403. Therefore, the discharge of static electricity from the finger to the open / close sensor 403 is suppressed, and the open / close sensor 4 Electrostatic damage in 03 is suppressed.

[0152] In addition, the tip of the facing portion 407b is connected to the detection portion of the sensor portion of the open / close sensor 403 in the front-rear direction. It is more preferable to position the sensor 1 behind the sensor face H. Even if a finger approaches the open / close sensor 403, the arm is opened before the open / close sensor 403. The finger approaches the facing portion 407b of the sensor plate 407. After the electricity is discharged and neutralized, the finger approaches the open / close sensor 403. In this method, even if a finger approaches the open / close sensor 403, the electrostatic This suppresses electrostatic discharge, and further suppresses electrostatic damage to the open / close sensor 403.

[0153] The opposing portion 407b of the earth plate 407 also penetrates above the sensor mounting hole 401h. Providing a hole weakens the rigidity of the sensor holder 401. In the opposite direction, a through hole 401g is provided at a position different from the sensor mounting hole 401h. However, the rigidity of the sensor holder 401 is sufficiently ensured. If possible, one facing portion 407b should be arranged to face the entire open / close sensor 403. It is preferable to do so.

[0154] The above description is merely an example, and each of the following aspects provides unique effects. (Aspect 1) A first member such as a sensor holder 401 and a harness holding member 4 attached to the first member 6 and a second member such as 504. At least one of the first member and the second member has a connector provided at one end of the electric wire 504. A connector cover portion that covers the connector 505 (in this embodiment, the harness of the harness holding member 46) The sensor cover portion 46b1, the sensor upper cover portion 401a and the sensor lower cover portion 401b of the sensor holder 401, The bar portion 401d corresponds to this.

[0155] According to this, the connector cover portion provided on at least one of the first member and the second member By covering the connector 505, static electricity is prevented from being discharged from a finger or the like to the connector 505. This can prevent electrical components such as the open / close sensor 403 to which the connector 505 is connected. This can prevent electrostatic damage from occurring.

[0156] (Aspect 2) In the first embodiment, a first member such as a sensor holder 401 and a harness holding member such as a harness holding member 46 are Each of the second members is provided with a cover portion, and the connector cover portion of the first member and the second member The connector cover portion of the material covers all four sides of the connector 505.

[0157] According to this, as described in the embodiment, the connector 505 can be accessed from any of the four directions. This can prevent the approach of the fingers, etc., and further suppresses the discharge of static electricity from the fingers, etc., to the connector 505. Can be controlled.

[0158] (Aspect 3) In the first or second embodiment, the first member such as the sensor holder 401 and the harness holding member 46, etc., is connected to at least one of the first and second members from the connector 505. In this embodiment, the wiring holding portion 401b of the sensor holder 401 is formed by A gap S between the bottom and the lower part of the mounting portion 46a of the harness holding member 46 and the electric wire holding groove 46 a1 corresponds to the convex space formed by the wire cover 504 In this embodiment, the cover portion 46b of the sensor holder 401 and the sensor lower cover portion 40 1d).

[0159] This prevents a finger or the like from getting caught on the electric wire 504, as described in the embodiment. This prevents the harness 500 from being damaged due to an external force being applied to the harness 500. In addition, if the connection between the connector 505 and the electrical parts such as the open / close sensor 403 comes off, This can prevent the connection from becoming half-connected.

[0160] (Aspect 4) In any one of the first to third aspects, the first member such as the sensor holder 401 is a harness holder. A mounting groove portion such as mounting groove 401b to which a second member such as member 46 is attached is provided. On both sides of the mounting groove, protrusions such as the locking protrusion 401c are formed. The member is elastically deformable and has a locking claw portion 46a that hooks onto the protrusion to lock the second member to the first member. 2 and has an attachment portion 46a that is attached to the attachment groove portion.

[0161] According to this, the claw portion such as the locking claw portion 46a2 is locked to the protrusion portion such as the locking protrusion 401c. By this, the mounting portion 46a can be mounted in a mounting groove portion such as the mounting groove 401b. can be done.

[0162] (Aspect 5) In the fourth embodiment, the bottom surface of the mounting groove portion such as the mounting portion 46a and the mounting groove 401b There is a gap S between them.

[0163] According to this, as described with reference to FIG. 20, the electric wire 504 is attached to the attachment portion 46a. This prevents the electric wire 504 from being pinched between the bottom surface of the mounting groove and the wire 504, thereby preventing the electric wire 504 from being broken. This can be done.

[0164] (Aspect 6) In the fourth or fifth embodiment, the upper end 401f of the mounting groove portion such as the mounting groove 401b is Each opening edge is rounded.

[0165] According to this, as described in the embodiment, the R-shaped opening edge portion The mounting portion 46a of the second member, such as the member 46, is fitted into a mounting groove portion, such as the mounting groove 401b. This allows the mounting portion 46a to be easily attached to the mounting groove. It is possible.

[0166] (Aspect 7) In any of the first to sixth aspects, the second member such as the harness retaining member 46 is connected to the first member. The wiring holding portion (in this embodiment, the mounting portion of the sensor holder 401) formed by the second member A gap S between the bottom of the groove 401b and the lower part of the mounting portion 46a of the harness holding member 46, A wire guide portion that guides the wire 504 into a convex space formed by the wire holding groove 46a1 and the wire holding groove 46a2. It has guide parts such as 46b2.

[0167] According to this, the electric wire 504 extending from the connector 505 can be smoothly inserted into the wire holding portion. I can crawl around.

[0168] (Aspect 8) In the seventh embodiment, the guide portion such as the wire guide portion 46b2 is separated from the connector 505. As the wire holder (in this embodiment, the bottom of the mounting groove 401b of the sensor holder 401) The gap S between the lower part of the mounting portion 46a of the harness holding member 46 and the electric wire holding groove 46a1 It is an inclined surface approaching a convex space formed by the

[0169] According to this, the electric wire 504 extending from the connector 505 can be smoothly inserted into the wire holding portion. I can crawl around.

[0170] (Aspect 9) In the seventh or eighth embodiment, the guide portion such as the electric wire guide portion 46b2 is provided in the sensor holder 40. The attachment portion 4 of the second member such as the harness holding member 46 attached to the first member such as the harness holding member 4 It is connected to 6a.

[0171] According to this, as described in the embodiment, the rigidity of the mounting portion 46a can be increased. When an external force is applied to the mounting portion 46a, the mounting portion 46a is elastically deformed and the second member comes off the first member. This can prevent the problem from occurring.

[0172] (Aspect 10) In any one of the first to ninth aspects, a first member such as a sensor holder 401 and a harness holder Each of the second members, such as member 46, is provided with a connector cover portion. The connector cover part (in this embodiment, the sensor upper cover part 401a) of one member is overlapped with the overcoat. It has a burlap portion 46b3.

[0173] According to this, a gap is formed between the connector cover portion of the first member and the connector cover portion of the second member. This can prevent the occurrence of a gap between the connector cover portion of the first member and the connector cover portion of the second member. This prevents tools and other members from approaching through the gap between the connector cover and the connector 505. The occurrence of electrical discharge can be further suppressed.

[0174] (Aspect 11) In any of the first to tenth embodiments, the second member, such as the harness retaining member 46, comprises at least The portion facing the opposing member (the conveying cover portion 100c in this embodiment) facing the second member. is movable within a predetermined range in the opposing direction relative to the opposing member.

[0175] According to this, as described with reference to FIG. 24, the cover part 100 on the conveyance side may be damaged due to the dimensional tolerance. The position of the opposing member such as c is shifted toward the second member from the target position, and the opposing member When the second member is pressed, at least the portion of the second member facing the opposing member moves in the opposing direction and escapes. This makes it possible to prevent damage to the second member such as the harness holding member 46. can.

[0176] (Aspect 12) In any of the first to eleventh aspects, the first member such as the sensor holder 401 includes a connector 5 A component holder for holding electrical components such as an open / close sensor 403 to which the component 05 is connected. The product holder has a facing portion 407b facing the electric component, and is an electrically grounded earth plate. An earthing member such as 407 is attached.

[0177] According to this, as described in the embodiment, before a finger or the like approaches an electric component, the finger or the like is removed from the electric component. It is possible to discharge static electricity toward the opposing portion 407b of the earth member such as the earth plate 407. It is possible to suppress the discharge of static electricity to electrical components, and prevent electrostatic damage to electrical components. can be suppressed.

[0178] (Aspect 13) In any of the first to twelfth aspects, the first member such as the sensor holder 401 is a connector 50 A component holder for holding an electric component such as an open / close sensor 403 to which the sensor 5 is connected, The component holding member is a component cover portion (a sensor upper cover portion in this embodiment) that covers the electrical components. The sensor lower cover part 401a and the sensor lower cover part 401d correspond to this.

[0179] According to this, as described in the embodiment, the electric components such as the open / close sensor 403 are fixed. This can prevent the device 106 from colliding with the device 106, and can prevent damage to electrical components. Cut.

[0180] (Aspect 14) An electric component such as an open / close sensor 403 and a connector 505 connected to the electric component are provided at one end. In the image forming apparatus, a wire holder is provided to hold the wire. As the wire holder, any one of the wire holders according to embodiments 1 to 13 was used.

[0181] This makes it possible to suppress electrostatic damage to electrical components. [Explanation of symbols]

[0182] 1: Printer 46: Harness holding member 46a: Mounting part 46a1: Wire holding groove 46a2: Locking claw part 46a3: Stopper 46a4: Inclined surface 46b: Cover part 46b1: Harness cover part 46b2: Wire guide section 46b3: Overlap section 46b4: Upper cover part 100: Paper transport section 100a: Front cover 100b: Handle part 100c: Transport upper cover part 100d: Outer edge 106: Fixing device 106c: Fixing top cover 106d: Cover handle 107a: Front plate 107b: Air intake 124: Ventilation fan 128: Intake duct 401: Sensor holder 401a: Sensor upper cover 401b: Mounting groove 401c: Locking protrusion 401d: Sensor bottom cover 401e: Fixing guide rib 401f: Upper end 401g:Through hole 401h: Sensor mounting hole 403: Open / close sensor 403a: Sensor section 403b: Substrate 403c: Connection terminal 403d: Mounting claw part 407: Earth plate 407a: One end 407b: Opposite part 408: Fan holder 500: Harness 504: Electric wire 505: Connector 505a: Wire insertion hole [Prior art documents] [Patent documents]

[0183] [Patent Document 1] JP 2018-168894 A

Claims

1. an opening / closing member provided inside the image forming apparatus body; an opening / closing sensor provided near the opening / closing member and configured to detect opening / closing of the opening / closing member; an earth member provided near the opening / closing member and facing the opening / closing sensor; having The earth member, the opening / closing sensor, and the opening / closing member are arranged in this order in a direction in which the opening / closing member in a closed state is accessed, The image forming apparatus according to claim 1, wherein a tip of the earth member protrudes toward the opening / closing member beyond a detection surface of the opening / closing sensor.

2. An opening / closing member provided inside an image forming apparatus body; an opening / closing sensor provided near the opening / closing member and configured to detect opening / closing of the opening / closing member; an earth member provided near the opening / closing member and facing the opening / closing sensor; having The earth member, the opening / closing sensor, and the opening / closing member are arranged in this order toward a direction in which the opening / closing member in a closed state is accessed, The image forming apparatus according to claim 1, wherein the opening / closing sensor and the grounding member are disposed in a direction intersecting with a direction in which the opening / closing member is opened and closed.

3. 3. The image forming apparatus according to claim 1, wherein the opening and closing member is a cover handle for operating an opening and closing of an opening and closing cover capable of opening the transport path.

4. 3. The image forming apparatus according to claim 2, wherein the tip of the earth member is located at the same position as a detection surface of the open / close sensor.

Images