Circuit board assembling device

Abstract

A circuit board assembly device is provided with: a circuit board; the mounting plate is used for mounting the circuit board; a structure disposed above the circuit board and requiring work; and a blocking member that is provided in at least a portion of a range from the structure to the circuit board and blocks at least a portion of a route from an article falling from above by the operation to a gap between the circuit board and the mounting plate.

Description

Technical Field

[0001] The present invention relates to a circuit board assembly device. Background Art

[0002] Japanese Unexamined Patent Application Publication No. 2018-125609, which is Patent Document 1, discloses an image reading device.

[0003] Patent Document 1 describes the following: The above image reading device includes a sheet conveying unit, an image reading unit that reads an image of a sheet, a driving unit that transmits power to the conveying unit, a first cover, and a second cover. The first cover is a cover that, when displaced to the closed position, is in a state of covering a part of the sheet conveying path and, when displaced to the open position, is in a state of exposing a part of the conveying path to the outside. The second cover is a cover that is provided at a position adjacent to the first cover in the closed position and covers the driving unit.

[0004] Furthermore, Patent Document 1 also describes the following: In the above image reading device, the second cover has a partition wall disposed at a position separating the driving unit and the conveying path, and a first gap that communicates the spaces on both sides separated by the partition wall is provided between the partition wall and other components disposed below the partition wall, or a structure capable of generating the first gap.

[0005] Moreover, Patent Document 1 also describes the following: In the above image reading device, a second gap is provided between the first cover in the closed position and the partition wall, or a structure capable of generating the second gap, and a receiving portion for receiving foreign matter that passes through the second gap and falls downward is provided at a position directly below the second gap and above the first gap.

[0006] Japanese Unexamined Patent Application Publication No. 2016-159986, which is Patent Document 2, discloses a sheet conveying device.

[0007] Patent Document 2 describes the following: The above sheet conveying device includes a sheet placement portion, a feeding mechanism for feeding a sheet placed on the placement portion, a conveying guide device provided on the downstream side of the feeding mechanism, a sensor, a control board, a protection member, and a sensor unit. The sensor is a sensor that detects a sheet conveyed on the conveying guide device through an opening provided in the conveying guide device. The control board is a board provided with elements of the sensor. The protection member is a member provided so as to cover the elements. The sensor unit is a unit disposed below the conveying guide device.

[0008] Furthermore, Patent Document 2 also describes the following: In the above sheet conveying device, the protection member includes a contact portion that contacts the upper surface of the control board and a claw-shaped engagement portion that engages with the lower surface of the control board.

[0009] Patent Document 1: Japanese Patent Application Laid-Open No. 2018-125609 (Claim 1, Figures 1 to 7 )

[0010] Patent Document 2: Japanese Patent Application Laid-Open No. 2016-159986 (Claim 1, 5, Figure 1 , Figure 5 ) Summary of the Invention

[0011] An object of the present invention is to prevent an object falling from above during operation from entering a gap between a circuit board and a mounting board in a circuit board assembly device including a circuit board, a mounting board on which the circuit board is mounted, and a structure that is disposed above the circuit board and requires operation.

[0012] An object of the present invention is to prevent an object falling from above during operation from entering a gap between a circuit board and a mounting board, as compared with a case where no blocking member is provided, the blocking member blocking at least a part of a route of the object to the gap.

[0013] A first aspect of the present invention is a circuit board assembly device including:

[0014] A circuit board;

[0015] A mounting board for mounting the circuit board;

[0016] A structure that is disposed above the circuit board and requires operation; and

[0017] A blocking member that is provided in at least a part of a range from the structure to the circuit board and blocks at least a part of a route of an object falling from above during the operation to a gap between the circuit board and the mounting board.

[0018] A second aspect of the present invention is a circuit board assembly device as follows. In the circuit board assembly device according to the first aspect,

[0019] The circuit board is disposed in a positional relationship inside a maximum width in a horizontal direction of a part of the structure that intersects the depth direction, the part intersecting the depth direction from the circuit board toward the mounting board.

[0020] The blocking member is provided with a width equal to or greater than a width corresponding to a maximum width in a horizontal direction of a surface of the circuit board that intersects the depth direction.

[0021] A third aspect of the present invention is a circuit board assembly device as follows. In the circuit board assembly device according to the first aspect,

[0022] The circuit board is arranged in a positional relationship such that a part of the surface intersecting the depth direction from the circuit board toward the mounting board exists inside the maximum width in the horizontal direction of the portion of the structure intersecting the depth direction.

[0023] The blocking member is provided with a width greater than or equal to the width corresponding to the part of the surface of the circuit board.

[0024] A fourth aspect of the present invention is a circuit board assembly device as follows. According to the circuit board assembly device of the above first aspect, wherein,

[0025] The circuit board is arranged in a positional relationship such that the surface intersecting the depth direction from the circuit board toward the mounting board overlaps with the maximum width in the horizontal direction of the portion of the structure intersecting the depth direction and exists with a width wider than the maximum width.

[0026] The blocking member is provided with a width greater than or equal to the maximum width of the structure.

[0027] A fifth aspect of the present invention is a circuit board assembly device as follows. According to the circuit board assembly device according to any one of the above first to fourth aspects, wherein,

[0028] The blocking member is arranged within a range of the lower half portion excluding the intermediate position between the structure and the circuit board.

[0029] A sixth aspect of the present invention is a circuit board assembly device as follows. According to the circuit board assembly device according to any one of the above first to fifth aspects, wherein,

[0030] The blocking member is arranged in the depth direction horizontally from the circuit board toward the mounting board with a dimension longer than the depth dimension of the gap.

[0031] A seventh aspect of the present invention is a circuit board assembly device as follows. According to the circuit board assembly device according to any one of the above first to sixth aspects, wherein,

[0032] The blocking member is arranged in a state such that the gap cannot be seen due to the blocking member when viewed from above in the vertical direction downward.

[0033] An eighth aspect of the present invention is a circuit board assembly device as follows. According to the circuit board assembly device according to any one of the above first to seventh aspects, wherein,

[0034] The blocking member has an upper surface portion, and the upper surface portion is composed of a lower inclined surface that slopes downward as it passes through the circuit board from the mounting board and moves away.

[0035] The ninth aspect of the present invention is a circuit board assembly device as follows. According to the circuit board assembly device described in any one of the first to eighth aspects above, wherein,

[0036] The blocking member has an upper surface portion, and the upper surface portion has an upwardly inclined upper inclined surface portion at an end away from the mounting plate.

[0037] The tenth aspect of the present invention is a circuit board assembly device as follows. According to the circuit board assembly device described in any one of the first to ninth aspects above, wherein,

[0038] The blocking member has an end portion for a wiring cable to approach, contact, and pass through, and the end portion is bent.

[0039] The eleventh aspect of the present invention is a circuit board assembly device as follows. According to the circuit board assembly device described in any one of the first to tenth aspects above, wherein,

[0040] As the circuit board, there is a front-side circuit board disposed on the front side that is the first to be exposed to the outside, and a back-side circuit board disposed on the inner side that is closer to the inside than the front-side circuit board and is difficult to visually recognize from the outside.

[0041] As the mounting plate, there is a front-side mounting plate for mounting the front-side circuit board and a back-side mounting plate for mounting the back-side circuit board.

[0042] As the blocking member, an intermediate blocking member is additionally provided in at least a part of the range from the structure to the front-side circuit board and the back-side circuit board. The intermediate blocking member blocks at least a part of the inner first route from an object falling from above to the gap between the front-side mounting plate and the back-side circuit board.

[0043] The twelfth aspect of the present invention is a circuit board assembly device as follows. According to the circuit board assembly device described in the eleventh aspect above, wherein,

[0044] As the blocking member, a back-side blocking member is additionally provided in at least a part of the range from the structure to the front-side circuit board and the back-side circuit board. The back-side blocking member blocks at least a part of the inner second route from an object falling from above to the gap between the back-side circuit board and the back-side mounting plate.

[0045] The thirteenth aspect of the present invention is a circuit board assembly device as follows. According to the circuit board assembly device described in any one of the first to twelfth aspects above, wherein,

[0046] As the circuit board, there is a circuit board that needs to be cooled.

[0047] The circuit board assembly device is provided with a blower fan, and the blower fan is arranged in a state of overlapping above a part of the upper end of the circuit board to be cooled.

[0048] The blocking member is arranged to exist at least in a part other than the above-mentioned part of the upper end of the circuit board to be cooled.

[0049] The 14th aspect of the present invention is a circuit board assembly device as follows. According to the circuit board assembly device described in the above 13th aspect, it includes:

[0050] An opposing plate is arranged in a state of facing the circuit board to be cooled.

[0051] At least a part of the area of the opposing plate facing the circuit board to be cooled is provided with ventilation holes.

[0052] The 15th aspect of the present invention is a circuit board assembly device as follows. According to the circuit board assembly device described in any one of the above 1st to 14th aspects, wherein,

[0053] The structure is arranged in a state where the first imaginary plane that virtually extends vertically downward from the part to be operated overlaps at least a part of the gap, or is arranged at a position behind the gap.

[0054] The 16th aspect of the present invention is a circuit board assembly device as follows. According to the circuit board assembly device described in any one of the above 1st to 15th aspects, wherein,

[0055] The structure is arranged at a position behind the circuit board.

[0056] The 17th aspect of the present invention is a circuit board assembly device as follows. According to the circuit board assembly device described in the above 16th aspect, wherein,

[0057] The structure is arranged at a position behind the second imaginary plane that virtually extends vertically upward from the upper end of the circuit board.

[0058] Advantages of the Invention

[0059] According to the circuit board assembly device of the above 1st aspect, compared with the case where no blocking member is provided, it is possible to prevent an item dropped from above during operation from entering the gap between the circuit board and the mounting board, and the blocking member blocks at least a part of the route of the item to the gap.

[0060] According to the circuit board assembly device of the above 2nd aspect, compared with the case where the blocking member is arranged with a width narrower than the width corresponding to the maximum width of the circuit board, it is possible to prevent a dropped item from entering the gap between the circuit board and the mounting board.

[0061] In the circuit board assembly device according to the above-described third solution, compared with the case where the blocking member is provided with a width narrower than the width of a part of the surface of the circuit board that intersects the depth direction and is inside the maximum width of the structure, it is possible to prevent a dropped object from entering the gap between the circuit board and the mounting plate.

[0062] In the circuit board assembly device according to the above-described fourth solution, compared with the case where the blocking member is provided with a width narrower than the maximum width of the structure, it is easier to prevent a dropped object from entering the gap between the circuit board and the mounting plate.

[0063] In the circuit board assembly device according to the above-described fifth solution, compared with the case where the blocking member is provided in the lower half range that does not include the middle position, for a dropped object, it is possible to block the route to the gap between the circuit board and the mounting plate at an early stage of the start of the drop.

[0064] In the circuit board assembly device according to the above-described sixth solution, compared with the case where the blocking member is provided with a dimension shorter than the depth dimension of the gap, it is easier to prevent an object dropped from above from entering the gap between the circuit board and the mounting plate.

[0065] In the circuit board assembly device according to the above-described seventh solution, compared with the case where the blocking member is provided in a state where at least a part of the gap can be seen when observing the blocking member from above in the vertical direction, it is easier to prevent an object dropped from above from entering the gap between the circuit board and the mounting plate.

[0066] In the circuit board assembly device according to the above-described eighth solution, compared with the case where the blocking member does not have an upper surface portion formed by a lower inclined surface, an object that lands on the blocking member does not stay on the upper surface portion of the blocking member.

[0067] In the circuit board assembly device according to the above-described ninth solution, compared with the case where the blocking member does not have an upper surface portion having an upper inclined surface portion when two or more circuit boards are arranged in a vertically offset manner below the blocking member, it is possible to suppress an object that lands on the blocking member from staying and falling again.

[0068] In the circuit board assembly device according to the above-described tenth solution, compared with the case where the end portion of the blocking member where the wiring cable approaches, contacts, and passes through is formed in a bent shape, the possibility of damage due to contact between the wiring cable and the end portion of the blocking member is reduced.

[0069] In the circuit board assembly device according to the above-described eleventh solution, compared with the case where no intermediate blocking member is additionally provided as the blocking member, it is also possible to prevent a dropped object from entering the gap between the front-side mounting plate and the inner circuit board.

[0070] The circuit board assembly device according to the 12th aspect above can also prevent the dropped objects from entering the gap between the inner circuit board and the inner mounting plate, as compared with the case where the inner blocking member is not additionally provided as a blocking member.

[0071] The circuit board assembly device according to the 13th aspect above can easily cool the circuit board to be cooled by the airflow generated by the air supply fan, as compared with the case where the blocking member is not provided in the upper part of the circuit board to be cooled except for a part where the air supply fan is overlapped and arranged.

[0072] The circuit board assembly device according to the 14th aspect above can easily cool the circuit board to be cooled by external gas, as compared with the case where the ventilation holes are not provided in at least a part of the area of the opposing plate facing the circuit board to be cooled.

[0073] The circuit board assembly device according to any one of the 15th to 17th aspects above can prevent the dropped objects due to the operation from entering the gap between the circuit board and the mounting plate even when performing the operation related to the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0074] The embodiments of the present invention will be described in detail with reference to the following drawings.

[0075] Figure 1 (A) of is a schematic perspective view when observing an example of the circuit board assembly device according to Embodiment 1, that is, an image forming apparatus, from the obliquely front side, Figure 1 (B) of is to disassemble Figure 1 (A) of the image forming apparatus and a schematic perspective view when observing from the obliquely rear side after removing the rear cover body;

[0076] Figure 2 is a schematic view when observing the rear of the image forming apparatus of (B) from the directly rear side after removing the rear cover body; Figure 1 (B) of is a schematic view when observing the rear of the image forming apparatus of (B) from the directly rear side after removing the rear cover body;

[0077] Figure 3 is a schematic side view showing the relationship between the circuit board and the mounting plate;

[0078] Figure 4 is shown in Figure 1 (B) of the image forming apparatus is a schematic view of the state where the blocking member is provided;

[0079] Figure 5 is a schematic side view showing the state of one circuit board, the structure, and the blocking member;

[0080] Figure 6 is a schematic side view showing the state of other circuit boards, the structure, and the blocking member;

[0081] Figure 7 Figure (A) is a schematic top view when observing an upper blocking component and its surrounding parts from above. Figure 7 Figure (B) is a schematic top view when observing another upper blocking component and its surrounding parts from above.

[0082] Figure 8 Figure (A) is a schematic perspective view when observing mainly another upper blocking component and its surrounding parts such as those of Figure (B) from an oblique rear direction. Figure 7 Figure (B) is a schematic perspective view when observing mainly another upper blocking component and its surrounding parts such as those of Figure (B) from an oblique rear direction. Figure 8 Figure (B) shows Figure 8 a schematic diagram of the structure of the upper blocking component of Figure (A).

[0083] Figure 9 is a schematic diagram showing the structures of a circuit board, a blower fan, and an upper blocking component.

[0084] Figure 10 is a schematic view when observing the circuit board assembly device according to Embodiment 2 from the right side.

[0085] Figure 11 is a schematic side view showing a modification example of the upper blocking component.

[0086] Figure 12 is a schematic side view showing another modification example of the upper blocking component.

[0087] Figure 13 Figure (A) is a schematic diagram showing an arrangement example of the upper blocking component. Figure 13 Figure (B) is a schematic diagram showing another arrangement example of the upper blocking component.

[0088] Reference Signs

[0089] 1 - Circuit board assembly device, 3 - Circuit board, 3D - Near - front - side circuit board, 3E - Inner - side circuit board, 4 - Mounting board, 4D - Near - front - side mounting board, 4E - Inner - side mounting board, 5 - Structure, 6 - Blocking member, 6M - Intermediate blocking member, 6B - Inner - side upper - side blocking member, 9 - Article, 12r - Rear cover body (an example of an opposing plate), 56 - Wiring cable, 61s - Upper - surface portion formed by a lower inclined surface, 61q - Upper - surface portion having an upper - inclined surface portion, 64c - End portion (end portion for the wiring cable to approach or pass through), 65 - Upper - inclined surface portion, D - Depth direction, E - Interval (an example of the depth dimension of the clearance), H - Route, H10 - First route, H20 - Second route, Pd - Range of the lower half portion, Pm - Intermediate position, Pu - Range of the upper half portion, S - Clearance (clearance between the circuit board and the mounting board), S10 - Clearance (clearance between the near - front - side circuit board and the inner - side circuit board), W - Maximum width, W61 - Width of the upper - side blocking member 61, W64 - Width of the upper - side blocking member 64, We - Width corresponding to a part of the maximum width of the circuit board that exists inside the structure. Detailed implementation mode

[0090] Hereinafter, a mode for implementing the present invention will be described.

[0091] Embodiment 1.

[0092] Figure 1 FIG. shows the circuit board assembly device 1 according to Embodiment 1 of the present invention.

[0093] In this specification and the drawings, substantially the same constituent elements are denoted by the same reference numerals. Also, repeated descriptions of the same constituent elements are omitted in this specification. Also, in the drawings, in order to ensure easy understanding, almost all the illustrations other than the parts required for the description are omitted.

[0094] (1) Overall structure of the circuit board assembly device

[0095] The circuit board assembly device 1 is a device that at least assembles a circuit board 3 described later, a mounting board 4 for mounting the circuit board 3, and a structure 5 that requires operation.

[0096] In Embodiment 1, as an example of the circuit board assembly device 1, an image forming device 10 is exemplified.

[0097] The image forming device 10 is a device that forms an image corresponding to image information read from an image reading device or input from the outside on a sheet of paper as an example of a recording medium.

[0098] As shown in Figure 1 the image forming device 10, which is an example of the circuit board assembly device 1, has a housing 11 having a prescribed shape.

[0099] The housing 11 is a box-shaped structure formed into a prescribed external shape. The housing 11 is manufactured, for example, by variously combining a structural frame (not shown) serving as a skeleton, auxiliary components (not shown), an exterior material 12, and the like.

[0100] The auxiliary components are partition components, mounting components, etc. The exterior material 12 is a front cover 12f, left and right side covers 12c, 12d, a rear cover 12r, or openable / closable covers 13a, 13b, 13c, etc.

[0101] In Embodiment 1, the housing 11 is configured as a structure having an external shape of a substantially rectangular parallelepiped.

[0102] The image forming apparatus 10 is an apparatus that forms an image corresponding to image information read from an image reading apparatus or input from the outside on a sheet of paper, which is an example of a recording medium.

[0103] The image information is information related to elements that are to be formed as an image. The image information is information including at least one of elements such as characters, marks, figures, tables, photographs, patterns, etc.

[0104] And, as shown in (A) of Figure 1 , the image forming apparatus 10 includes an image forming unit 21, a medium supply unit 22, etc. disposed in the internal space of the housing 11.

[0105] Further, the image forming apparatus 10 includes an image reading unit 23 disposed above the housing 11, a discharge and storage unit 24 provided in a portion of the housing 11 that is below the image reading unit 23, etc.

[0106] The image forming unit 21 is a portion that directly forms an image corresponding to the image information on a sheet of paper or the like by a prescribed image forming method, or transfers the image to a sheet of paper or the like after forming the image. As the image forming method, for example, an electrophotographic method, an inkjet method, a thermal method, etc. can be cited.

[0107] The medium supply unit 22 is a portion that houses a recording medium such as a sheet of paper that is an object for forming an image and conveys and supplies the recording medium to the image forming unit 21. The front portion of the housing that houses the recording medium of the medium supply unit 22 also serves as a part of the front cover 12f of the housing 11. An unillustrated medium conveyance path is provided between the medium supply unit 22 and the image forming unit 21.

[0108] The image reading unit 23 is a portion that reads an image of an original and transmits the read image information to the image forming unit 21. Among the image reading units 23, there are also image reading units having an automatic document feeder that automatically conveys the original to be read to the image reading unit 23.

[0109] The discharge and storage unit 24 is a part for discharging and storing recording media such as sheets on which images are formed. A media conveyance path (not shown) is provided between the image forming unit 21 and the discharge and storage unit 24.

[0110] When the control device 26 described later receives an instruction for an image forming operation, the image forming apparatus 10 performs the following image forming operation under the control of the control device 26.

[0111] First, in the image forming unit 21, an image corresponding to the input image information is formed. On the other hand, in the media supply unit 22, recording media such as sheets are supplied to the image forming unit 21 via the media conveyance path. Thus, the image is formed on the recording media.

[0112] Next, the recording media on which the image is formed are conveyed and stored so as to be discharged from the image forming unit 21 to the discharge and storage unit 24 via the media conveyance path. Thus, the image formation for one recording media is completed.

[0113] And, as Figure 1 shown in (B) of Figure 3 etc., the image forming apparatus 10 includes a power supply device 25, a control device 26, a rotation driving device 27, a blowing device 28, circuit boards 3A, 3B, etc., which are arranged in the rear part of the housing 11.

[0114] Figure 1 shown in (B) of Figure 3 The image forming apparatus 10 shown in is the state when viewed from the rear with the rear cover body 12r as the exterior material 12 removed.

[0115] In the image forming apparatus 10, when the rear cover body 12r is removed, as Figure 1 shown in (B) etc., the power supply device 25 etc. arranged in the rear part of the housing 11 are exposed. And, in the image forming apparatus 10, by removing the rear cover body 12r, the rear surface 23r of the image reading unit 23 is also exposed.

[0116] The power supply device 25 is a device that outputs the electricity taken in from the outside as the electricity adjusted to the content such as the required voltage, frequency, direct current, etc. for actual use.

[0117] The power supply device 25 is provided on the bottom frame 14 which is one of the structural frames of the housing 11. The bottom frame 14 is formed in the form of columns, rods, plates, etc.

[0118] When viewed from the rear, the power supply device 25 in Embodiment 1 is arranged to be located below the control device 26.

[0119] The control device 26 is a device that receives information required for control operations and controls the overall operation or a part of the operation of the image forming apparatus 10.

[0120] The parts constituting the control device 26 are, for example, an arithmetic processing device, a storage element, a storage device, an input / output device, and the like.

[0121] Regarding the control device 26 in Embodiment 1, as Figure 1 shown by the dashed line in (B) of, the parts constituting the device are arranged inside the housing 261.

[0122] As Figure 1 shown in (B) and the like of, the housing 261 is constituted by a rear panel 261b, an upper panel 261c, a left side panel 261d, a front panel (not shown), a lower panel, a right side panel, and the like.

[0123] The rear panel 261b is a panel arranged at the rear when viewed in the front-rear direction of the frame 11. The left side panel 261d is formed in a shape with an opening through which a wiring cable passes.

[0124] In the front-rear direction, the front is the side of the image forming apparatus 10 that faces the user as the front surface. In the front-rear direction, the rear is the side that is the opposite back surface to the front surface.

[0125] Furthermore, the housing 261 is installed by being screwed to the rear frame 15, which is one of the structural frames of the frame 11. The rear frame 15 is formed in the form of columns, rods, plates, and the like.

[0126] Therefore, the control device 26 is installed on a part of the rear frame 15 via the housing 261.

[0127] When viewed from the rear, the control device 26 in Embodiment 1 is arranged to be present on the upper side of the rear frame 15. And the control device 26 is arranged to be present diagonally above the circuit board 3B via the housing 261.

[0128] The rotation drive device 27 is a device that outputs the rotational power required for the drive units such as the image forming unit 21. The rotation drive device 27 is constituted by parts such as a motor and a gearbox, for example.

[0129] The rotation drive device 27 is arranged to be present on the inner side of the frame 11. And the rotation drive device 27 is arranged in a state where a part thereof is exposed from the inspection opening 16 formed between the rear frames 15.

[0130] When viewed from the rear, the rotation drive device 27 in Embodiment 1 is arranged to be present in a part on the opposite side to the control device 26 in the upper part of the rear portion of the frame 11. And the rotation drive device 27 is arranged to be present above the circuit board 3A.

[0131] The air supply device 28 is a device that takes in external air (external gas) into the housing 11 and discharges it outside the housing 11 to generate an air supply. The air supply device 28 is composed of components such as an air supply fan 281, a fan mounting frame 282, and a duct (not shown).

[0132] The air supply device 28 is installed by being screwed to a part of the rear frame 15 via the air supply fan 281 and the fan mounting frame 282.

[0133] When viewed from the rear, the air supply device 28 in Embodiment 1 is arranged to be present in a part of the upper portion of the rear frame 15 on the side opposite to the control device 26 and between the control device 26 and the rotation drive device 27. And the air supply device 28 is arranged to be present diagonally above the circuit boards 3A and 3B.

[0134] Moreover, the image forming apparatus 10 further includes options and the like installed in the rear part of the housing 11.

[0135] An option is a device that is installed by being selected by the user. Therefore, in the image forming apparatus 10, there may sometimes be a case where there is no option if the user does not select it.

[0136] Options are, for example, a FAX (facsimile) communication device 201, a USB (universal serial bus) connection device 202, etc. For the above-mentioned image reading unit 23, there may sometimes be a case where it becomes one of the options.

[0137] The FAX communication device 201 is a communication device for converting an image (including text) of an original into an electrical signal and transmitting and receiving it through a communication line. The FAX communication device 201 is provided with an insertion port (not shown) for inserting connection terminals such as a cable for connecting to a communication line or a network.

[0138] When viewed from the rear, the FAX communication device 201 is arranged to be present on the side of the control device 26 and above the air supply device 28. And the FAX communication device 201 is arranged to be present diagonally above the circuit boards 3A and 3B.

[0139] The USB connection device 202 is a device capable of connecting to a USB device. The USB connection device 202 is provided with a USB port (not shown) for inserting a connector of a USB device or a USB cable.

[0140] When viewed from the rear, the USB connection device 202 is arranged to be present on the side of the control device 26 and the FAX communication device 201 and above the rotation drive device 27. And the USB connection device 202 is arranged to be present above the circuit board 3A.

[0141] As Figure 2 、 Figure 3As shown, the above circuit boards 3A and 3B are circuit boards formed by mounting circuit components 32A and 32B on substrates 31A and 31B respectively to form a specified circuit.

[0142] Substrates 31A and 31B are both plate-shaped components formed with wiring and mounting portions for circuit components 32. Such substrates 31A and 31B are, for example, called printed wiring boards.

[0143] As Figure 2 shown, the substrates 31A and 31B in Embodiment 1 have a mounting surface 31e on which circuit components 32A and 32B are mounted and are mounted, and a back surface 31f thereof.

[0144] Moreover, the substrates 31A and 31B are not limited to single-sided mounting type substrates for mounting circuit components on one side, and may also be double-sided mounting type substrates for mounting circuit components on both sides. Further, the substrates 31A and 31B may also be substrates having a multilayer structure.

[0145] Circuit components 32A and 32B are components used to constitute an electronic circuit or an electrical circuit.

[0146] Circuit components 32A and 32B are components such as so-called active components, passive components, and auxiliary components.

[0147] Active components are transistors, diodes, ICs (integrated circuits), etc. Passive components are resistors, coils, capacitors, transformers, etc. Auxiliary components are relays, switches, connectors, wiring, etc.

[0148] The circuit board 3A in Embodiment 1 is configured as, for example, a power conversion circuit board. When viewed from the rear, the circuit board 3A is arranged to be present on one side of the lower part of the rear frame 15. Moreover, the circuit board 3A is arranged to be present below the rotation drive device 27, the air supply device 28, etc. starting from below the image reading unit 23.

[0149] Moreover, the circuit board 3B in Embodiment 1 is configured as, for example, a power supply circuit board. When viewed from the rear, the circuit board 3B is arranged to be present on the lower part of the rear frame 15 and on the side opposite to the circuit board 3A. Moreover, the circuit board 3B is arranged to be present below the control device 26, the air supply device 28, etc. starting from below the image reading unit 23.

[0150] As Figure 2 or Figure 3 shown, the circuit board 3A is mounted on the mounting board 4A.

[0151] Figure 2The arrow D in [description] indicates the depth direction from the circuit boards 3A, 3B, etc. towards the mounting plates 4A, 4B, etc. respectively. The depth direction D in Embodiment 1 becomes the same direction as the direction horizontally from the rear to the front in the front-rear direction.

[0152] The depth direction D used in this specification is not limited to the commonly used depth direction from the front towards the rear. For example, if the circuit board 3A and the mounting plate 4A are arranged on the left side surface of the housing 11, the depth direction D from the circuit board 3A towards the mounting plate 4A becomes the same direction as the direction from the left side to the right side of the housing 11.

[0153] The mounting plate 4A is a plate-shaped component.

[0154] As Figure 2 or Figure 3 shown, as the mounting plate 4A in Embodiment 1, for example, a metal plate having a mounting surface 4At formed in the shape of a substrate 31A slightly wider than the circuit board 3A is used.

[0155] Regarding the mounting plate 4A, it is not limited to the entire surface of the plate being a closed surface, and an opening may be provided in a part of the plate surface.

[0156] As Figure 2 schematically shown, the substrate 31A of the circuit board 3A is mounted on the mounting plate 4A by fixing means such as screw fixation via a plurality of support members 35.

[0157] The support member 35 also serves as a spacing member for maintaining the spacing E1 between the substrate 31A and the mounting plate 4A at a specified dimension.

[0158] The spacing E1 is the distance between the back surface 31f of the substrate 31A and the mounting surface 4At of the mounting plate 4A. Also, the spacing E1 is the spacing of the gap S1, which will be described later, between the substrate 31A of the circuit board 3A and the mounting plate 4A.

[0159] And, as Figure 3 shown, the mounting plate 4A is mounted by screw-fixing a plurality of fixing portions 42 protruding at specified positions on its outer peripheral portion to the rear frame 15 or the bottom frame 14 of the housing 11.

[0160] As Figure 2 or Figure 4 shown, the circuit board 3B is mounted on the mounting plate 4B.

[0161] The mounting plate 4B is a plate-shaped component.

[0162] As Figure 2 or Figure 3As shown, as the mounting plate 4B in Embodiment 1, a metal plate having a mounting surface 4Bt formed in the shape of a substrate 31B slightly wider than the circuit board 3B is used.

[0163] Moreover, similar to the case of the mounting plate 4A, the mounting plate 4B is not limited to the entire surface of the plate being a closed surface, and an opening may be provided in a part of the plate surface.

[0164] As Figure 2 schematically shown, the substrate 31B of the circuit board 3B is mounted on the mounting plate 4B in a state fixed by fixing means such as screw fixation via a plurality of support members 35. At this time, the substrate 31B is held at an interval E2 from the mounting plate 4B by the support members 35. The interval E2 is not limited to the same size as the above-mentioned interval E1 and may be of a different size.

[0165] Moreover, as Figure 3 shown, the mounting plate 4B is mounted by screwing a plurality of fixing portions 43 provided at predetermined positions on its outer peripheral portion to the rear frame 15.

[0166] (2) Blocking member in the circuit board assembly device

[0167] Moreover, as Figure 4 shown, a blocking member 6 is provided in the image forming apparatus 10 which is an example of the circuit board assembly apparatus 1.

[0168] The blocking member 6 is an example of a member that blocks at least a part of the route of an article 9 that falls from above and leads to the gaps S1 and S2 between the circuit boards 3A and 3B and the mounting plates 4A and 4B along with the operation of the structure 5 that requires an operation (refer to Figure 2 ).

[0169] Here, the above-mentioned article 9 is an article having a shape or size that can fall due to the operation of the structure 5 and enter the above-mentioned gaps S1 and S2.

[0170] As such an article 9, it is mainly a fixing member such as a screw 91, and in addition, for example, staples of a stapler, clips (paper fasteners) and other small stationery or other small parts can also be cited. Articles 9 such as staples and clips are articles that are forgotten in a part of the image reading unit 23 or are accidentally dropped before the operation and left in a part of the rear 23r.

[0171] Moreover, the above-mentioned operation refers to operations related to the installation and disassembly (loading and unloading), maintenance (inspection), repair, etc. of the device or parts.

[0172] These operations include operations related to installed devices or parts, as well as operations related to later installed devices or parts such as options. Furthermore, these operations are not limited to manual operations by humans, but also include automatic operations using robots and the like.

[0173] And, if Figure 3 As shown in FIG. 1 and FIG. 2 , the structure 5 is a structure 5 that is disposed above at least one of the circuit boards 3A and 3B when viewed in a vertical up-down positional relationship among the structures 5 that require work.

[0174] In the first embodiment, the image reading unit 23, the housing 261 of the control device 26, the rotation drive device 27, the air supply device 28, the FAX communication device 201, the USB connection device 202, etc. correspond to the structure 5 that needs to be operated. Figure 3 As shown in the figure, in the first embodiment, the image reading section 23 is sometimes treated as the structure 5A, the rotation drive device 27 is treated as the structure 5B, the air supply device 28 is treated as the structure 5C, the storage body 261 is treated as the structure 5D, the FAX communication device 201 is treated as the structure 5E, and the USB connection device 202 is treated as the structure 5F.

[0175] Specifically, the operations of the structure 5 include operations of loading and unloading the image reading unit 23, the storage body 261, the rotation drive device 27, the air supply device 28, etc., and operations of removing or installing the screws 91 of the threaded fixing parts during maintenance or repair operations.

[0176] In addition, regarding the operation of the structure 5, when the optional FAX communication device 201 and the USB connection device 202 are installed later, the operation related to the later installation may be performed. Figure 3 As shown, there is a work of screwing the FAX communication apparatus 201 to the mounting member 17A such as a bracket by screws 91. In addition, as a work in this case, there is a work of screwing the USB connection device 202 to the mounting member 17B by screws 91.

[0177] Furthermore, at least a part of the above-mentioned routes means that there are multiple routes for the article 9 to reach the gaps S1 and S2, but there is no problem in limiting the routes to those predicted to be easy for the article 9 to enter the gaps S1 and S2 among the large number of routes.

[0178] In other words, it also means that among the large number of routes, routes for which it is predicted that the possibility of the article 9 entering the gaps S1 and S2 is low and routes that are already closed by other components can be eliminated.

[0179] Figure 4 Among them, the arrows H1 and H2 indicated by the long and short dashed line are specific examples of at least a part of the routes with a relatively large number.

[0180] The routes indicated by the arrows H1 and H2 are both examples of the routes leading to the upper ends of the gaps S1 and S2. Moreover, the routes indicated by the arrows H1 and H2 are also the routes when naturally falling under the influence of gravity.

[0181] Figure 3 and Figure 4 Schematically shows the rear of the housing 11 when the rear mask body 12r is disassembled. In this Figure 3 and Figure 4 the gaps S1 and S2 exist behind (front in the front-rear direction) the circuit boards 3A and 3B (the substrates 31A and 31B) in substantially the same shape and size as the circuit boards 3A and 3B (the substrates 31A and 31B).

[0182] Moreover, the blocking member 6 is provided in at least a part of the range from the structure 5 to the circuit boards 3A and 3B.

[0183] At least a part of the range from the structure 5 to the circuit boards 3A and 3B is not limited to the entire range, and means that it can be a required part of this range.

[0184] Furthermore, as long as the blocking member 6 is a member capable of preventing the falling object 9 from passing through, there is no particular limitation on its shape or form.

[0185] Then, in the first embodiment, as Figure 4 shown, an upper blocking member 61, a left-side blocking member 62, and a right-side blocking member 63 are provided around the circuit board 3A as the blocking member 6.

[0186] The upper blocking member 61, the left-side blocking member 62, and the right-side blocking member 63 are all composed of plate-shaped members. Moreover, the upper blocking member 61, the left-side blocking member 62, and the right-side blocking member 63 are all provided on the mounting board 4A of the circuit board 3A.

[0187] As Figure 4 shown, the upper blocking member 61 is provided on the remaining part of the upper end of the mounting board 4A except for the part where the fan mounting frame 282 of the air supply device 28 exists.

[0188] The reason is as follows. That is, a part of the upper end of the circuit board 3A is in a state where it is covered and hidden from above by a part of the fan mounting frame 282 of the air supply device 28 with respect to a part of the mounting plate 4A corresponding to the upper end thereof. Therefore, the upper blocking member 61 does not need to be provided at a part of the upper end of the mounting plate 4A corresponding to a part of the upper end of the circuit board 3A, and only needs to be provided at the remaining part except for a part of the upper end of the mounting plate 4A.

[0189] Moreover, the upper blocking member 61 is provided at a part of the range from the image reading unit 23 of the structure 5A, the USB connection device 202 of the structure 5F, and the rotation driving device 27 of the structure 5B to the circuit board 3A.

[0190] Furthermore, as Figure 5 shown, the upper blocking member 61 stands up from the upper end (upper side) of the mounting plate 4A toward the circuit board 3A, and the front end of the standing part is provided in a state of crossing over the upper end (upper side) 31At of the substrate 31A of the circuit board 3A.

[0191] At this time, as Figure 4 or Figure 5 shown, the upper blocking member 61 is provided in a state of being in contact with or approaching the upper end (upper side) of the substrate 31A.

[0192] The state of approaching related to the blocking member 6 means a state where there is a gap between the members close to the blocking member 6 that is of such a degree that the article 9 cannot pass through (the same applies hereinafter).

[0193] The left - hand side blocking member 62 is provided along substantially the entire vertical region of the left - hand side end (left - hand side part) of the mounting plate 4A.

[0194] Moreover, the left - hand side blocking member 62 is provided in a state of being in contact with or approaching the lower surface of the left end of the upper blocking member 61.

[0195] Furthermore, as Figure 5 indicated by the two - dot dashed line in, the left - hand side blocking member 62 stands up from the left end (left - hand side) of the mounting plate 4A toward the circuit board 3A, and the front end of the standing part is provided in a state of crossing over the left end (left - hand side) of the substrate 31A of the circuit board 3A. At this time, as Figure 4 shown, the left - hand side blocking member 62 is provided in a state of being in contact with or approaching the left end (left - hand side) of the substrate 31A.

[0196] The right - hand side blocking member 63 is provided along substantially the upper half of the vertical direction of the right - hand side end (right - hand side) of the mounting plate 4A.

[0197] Moreover, the right - hand side blocking member 63 is provided in a state of extending downward from the right end of the upper end (upper side) of the mounting plate 4A.

[0198] Moreover, as Figure 5 shown by the two-dot chain line in Figure 5 , the right-side blocking member 63 stands up from the right end (right side) of the mounting plate 4A toward the circuit board 3A, and the front end of the standing-up portion is set in a state of crossing over the right end (right side) of the substrate 31A of the circuit board 3A. At this time, as Figure 4 shown, the right-side blocking member 63 is set in a state of contacting or approaching the right end (right side) of the substrate 31A.

[0199] Next, in the first embodiment, as Figure 4 shown in Figure 4 and the like, an upper blocking member 64 is provided around the circuit board 3B as the blocking member 6.

[0200] The upper blocking member 64 is composed of a plate-like member. And the upper blocking member 64 is provided on the mounting plate 4B of the circuit board 3B.

[0201] And the upper blocking member 64 is provided on a part of each range from the image reading unit 23 of the structure 5A and the housing 261 of the structure 5D to the circuit board 3B.

[0202] And it can also be said that the upper blocking member 64 is provided on a part of each range from the FAX communication device 201 of the structure 5E and the air supply device 28 of the structure 5C to the circuit board 3B.

[0203] And the upper blocking member 64 is set in a state where its left end is close to the right-side blocking member 63 provided on the circuit board 3A side.

[0204] Moreover, as Figure 6 shown, the upper blocking member 64 stands up from the upper end (upper side) of the mounting plate 4B toward the circuit board 3B, and the front end of the standing-up portion is set in a state of slightly crossing over the upper end (upper side) of the substrate 31B of the circuit board 3B.

[0205] At this time, as Figure 4 or Figure 6 shown, the upper blocking member 64 is set in a state of contacting or approaching the upper end (upper side) 31Bt of the substrate 31B.

[0206] The upper blocking member 64 is set to slightly cross over only a little above the upper end of the substrate 31B for the following reasons.

[0207] That is, as Figure 6 or Figure 8As illustrated, in the circuit board 3B, it is necessary to ensure the following space, that is, a plurality of wiring cables 56 connected to circuit components 32B, etc. of the circuit board 3B are pulled toward other connection targets located above the circuit board 3B and passed through. Therefore, compared with the upper blocking member 61 provided, for example, on the upper end side of the circuit board 3A where the wiring cable 56 does not pass through, the upper blocking member 64 cannot be set in a state of significantly exceeding the upper end of the substrate 31B.

[0208] Incidentally, as Figure 5 or Figure 6 shown, regarding the image reading unit 23 as the structure 5A, its rear surface 23r is arranged in a state more rearward than the second imaginary plane J2.

[0209] The second imaginary plane J2 refers to a plane that is virtually extended vertically upward from the upper ends 31At, 31Bt of the substrates 31A, 31B of the circuit boards 3A, 3B, respectively. And the state of being rearward in this case means a state of being more offset toward the inside of the image forming apparatus 10 or the housing 11 than the second imaginary plane J2. The state of being rearward in Embodiment 1 means a state of being more offset toward the front side than the second imaginary plane J2 when observing along the front-rear direction of the image forming apparatus 10 or the like.

[0210] And, for the rotation driving device 27 as the structure 5B, similar to the case of the image reading unit 23, it is arranged in a state more rearward than the second imaginary plane J2.

[0211] Moreover, as Figure 5 etc. shown, both the rear surface 23r of the image reading unit 23 and the rotation driving device 27 are arranged at positions more rearward than the circuit boards 3A, 3B.

[0212] Therefore, when a screw 91 of an article 9 being processed in the operation of the rear surface 23r of the image reading unit 23 or the rotation driving device 27 drops, there is a high possibility that the screw 91 advances toward the gaps S1, S2 between the circuit boards 3A, 3B and the mounting plates 4A, 4B.

[0213] And, as Figure 5 shown, the rear portions of the air supply device 28 as the structure 5C, the FAX communication device 201 as the structure 5E, and the USB connection device 202 as the structure 5F are arranged in a state more forward than the second imaginary plane J2.

[0214] The state of being forward in this case means a state of being more offset toward the outside of the image forming apparatus 10 or the housing 11 than the second imaginary plane J2. The state of being forward in Embodiment 1 means a state of being more offset toward the rear side than the second imaginary plane J2 when observing in the front-rear direction of the image forming apparatus 10 or the like.

[0215] However, on the other hand, as Figure 5 shown, the FAX communication device 201 or the USB connection device 202 is arranged in a state where at least a part of the first imaginary plane J1 overlaps with the gap S1.

[0216] The first imaginary plane J1 refers to a plane that is virtually extended downward in the vertical direction from the part of the structure 5 that requires operation. And the part that requires operation refers to the part of the structure 5 where the operation is actually performed. The part that requires operation is, for example, the part where the screw 91 is installed (threaded hole, threaded mounting part).

[0217] Therefore, when the screw 91 of the article 9 being processed in the operation of the FAX communication device 201 or the USB connection device 202 falls, there is a high possibility that the screw 91 advances toward the gap S1 between the circuit board 3A and the mounting plate 4A. And when the gap S2 is in substantially the same positional relationship as the gap S1 in the front-rear direction, there is also a high possibility that the fallen screw 91 advances toward the gap S2 between the circuit board 3B and the mounting plate 4B.

[0218] Here, regarding the image forming apparatus 10 as an example of the circuit board assembling apparatus 1, even when an article 9 such as a screw 91 falls during an operation related to the structure 5, since the upper blocking members 61 and 64 serving as the blocking member 6 are provided, the article 9 involved is prevented from entering the gaps S1 and S2 between the circuit boards 3A, 3B and the mounting plates 4A, 4B.

[0219] That is, as Figure 5 or Figure 6 shown, the routes of the article 9 that falls due to the operation related to the structure 5 and leads to the gaps S1 and S2 respectively are blocked by the upper blocking members 61 and 64, so that it is prevented from entering the gaps S1 and S2.

[0220] Specifically, the routes of the article 9 that falls due to the operations related to the image reading unit 23, the housing 261, the rotation driving device 27, the air supply device 28, the FAX communication device 201, and the USB connection device 202 and advances from the upper part of the gaps S1 and S2 to the upper part of the gaps S1 and S2 respectively are blocked by the upper blocking members 61 and 64 arranged at positions above the gaps S1 and S2. Thereby, it is prevented that the article 9 that falls and advances toward the upper part of the gaps S1 and S2 enters the gaps S1 and S2 from above respectively.

[0221] Further, in the image forming apparatus 10, the routes of the articles 9 that fall and advance toward the left and right side portions of the gap S1 to reach the left and right side portions of the gap S1 are blocked by the right side blocking member 63 or the left side blocking member 62 disposed at the right side positions on the left and right sides of the gap S1. Thereby, it is possible to prevent the articles 9 that fall and advance toward the left and right side portions of the gap S1 from entering the gap S1 from the left and right side portions of the gap S1.

[0222] In particular, in the image forming apparatus 10, the route of the article 9 that falls and attempts to advance toward the left side portion of the gap S2 to reach the left side portion of the gap S2 is blocked by the presence of the right side blocking member 63 disposed on the side of the circuit board 3A that is substantially adjacent to the circuit board 3B. Therefore, it is possible to prevent the article 9 that falls and advances toward the left side portion of the gap S2 from entering the gap S2 from the left side portion of the gap S2.

[0223] This effect can also be obtained in the case where the first imaginary plane J1 in the FAX communication device 201 or the USB connection device 202 is disposed to be behind the gap S1.

[0224] The state of being behind in this case means that it exists in a state of being more offset toward the inner side of the image forming apparatus 10 or the housing 11 than the first imaginary plane J1. The state of being behind in the first embodiment means that when viewed from the front-rear direction of the image forming apparatus 10 or the like, it becomes a state of being more offset toward the front side than the first imaginary plane J1.

[0225] Moreover, according to the image forming apparatus 10 as an example of the circuit board assembling apparatus 1, since the blocking member 6 is provided, it is possible to omit the operation of confirming whether the article 9 has entered the gaps S1 and S2 and stayed midway.

[0226] Specifically, it is possible to omit the disassembling operation of disassembling the circuit boards 3A and 3B from the mounting boards 4A and 4B respectively and disassembling them, or the disassembling operation of disassembling the circuit boards 3A and 3B integrally with the mounting boards 4A and 4B and then disassembling them from the mounting boards 4A and 4B and disassembling them.

[0227] In addition, according to the image forming apparatus 10, due to the presence of the blocking member 6, it is possible to prevent articles that accidentally fall from above during movement or operation, etc., in addition to the articles 9 that fall due to the operation of the structure 5, from entering the gaps S1 and S2 between the circuit boards 3A and 3B and the mounting boards 4A and 4B.

[0228] (3) Positional relationship between the circuit board and the structure and the form of the blocking member

[0229] In the first embodiment, both the circuit boards 3A and 3B are disposed below the image reading unit 23 as the structure 5A.

[0230] Moreover, asFigure 3 As shown, the circuit boards 3A and 3B are arranged in a positional relationship inside the maximum width W1 of the image reading unit 23 with respect to the surfaces of the substrates 31A and 31B of the circuit boards 3A and 3B.

[0231] The maximum width W1 of the image reading unit 23 as the structure 5A refers to the distance (dimension) between the two end portions in the horizontal direction of the image reading unit 23. In the first embodiment, the horizontal direction with respect to the maximum width W1 also corresponds to the left - right direction of the image forming apparatus 10 or the housing 11.

[0232] When the circuit boards 3A and 3B and the image reading unit 23 as the structure 5A are arranged in the above - mentioned positional relationship, as Figure 4 shown, the upper blocking member 64 is preferably arranged such that its width W64 is equal to or greater than the maximum width Wb of the circuit board 3B. On the other hand, regarding the upper blocking member 61 in the first embodiment, its width W61 is not set to be equal to or greater than the maximum width Wa of the circuit board 3A. This is because, as described above, since a part of the gap S1 between the circuit board 3A and the mounting plate 4A has the fan mounting frame 282, there is no need to provide the upper blocking member 61 in this part.

[0233] The width W61 of the upper blocking member 61 and the width W64 of the upper blocking member 64 are, for example, the distances (dimensions) between the two end portions in the horizontal direction corresponding to the maximum width W1 of the image reading unit 23 as the structure 5A. And the maximum widths Wa and Wb of the circuit boards 3A and 3B are the distances (dimensions) between the two ends in the horizontal direction of the surfaces of the substrates 31A and 31B of the circuit boards 3A and 3B that intersect the depth direction D respectively.

[0234] However, in the first embodiment, the upper blocking member 61 is not set such that its width W61 is equal to or greater than the maximum width Wa of the circuit board 3A.

[0235] The reason for this is as follows. That is, as described above, a part of the gap S1 in the first embodiment is in a state of being covered and hidden from above by a part of the fan mounting frame 282 of the air supply device 28. Therefore, in the part corresponding to the covered and hidden part of the gap S1 above the circuit board 3A, there is no need to provide the upper blocking member 61.

[0236] As a result, regarding the upper blocking member 61, its width W61 is narrower than the maximum width Wa of the circuit board 3A.

[0237] When the upper blocking member 64 is set to have a width W64 that is equal to or greater than the maximum width Wb of the circuit board 3B, the entire upper end of the gap S2 can be covered, hidden, or closed by the upper blocking member 64 at a position above the gap S2.

[0238] Accordingly, in the image forming apparatus 10, for example, compared to the case where the upper blocking member 64 is set to have a width narrower than the maximum width Wb of the circuit board 3B, the route of the article 9 attempting to enter from above the gap S2 is blocked without omission by the upper blocking member 64, thereby reliably preventing the article 9 from entering the gap S2 from above.

[0239] Moreover, when observing the positional relationship between the circuit board 3B and the structure 5D disposed closest above it, i.e., the housing 261, they are arranged in the following positional relationship. That is, as Figure 4 shown, the circuit board 3B is arranged in a positional relationship such that a part of the surface of the substrate 31B of the circuit board 3B is inside the maximum width W4 (refer to Figure 3 ) of the housing 261.

[0240] The maximum width W4 of the housing 261 is the maximum width in the horizontal direction of the rear panel 261b of the housing 261.

[0241] When the circuit board 3B and the structure 5D, i.e., the housing 261, are arranged in the above-described positional relationship, the upper blocking member 64 is preferably set to have a width W64, for example, as follows.

[0242] That is, as Figure 4 shown, in this case, the upper blocking member 64 is preferably set to have a width W64 that is equal to or greater than the width We corresponding to the above-mentioned part of the surface of the substrate 31B of the circuit board 3B.

[0243] The above-mentioned part is the part inside the maximum width W4 (refer to Figure 3 ) of the housing 261 in the surface of the substrate 31B of the circuit board 3B. And the width W64 of the upper blocking member 64 at this time is maintained in a state where it is in a state of at least partially overlapping with the part corresponding to the width We of the above-mentioned part of the surface of the substrate 31B of the circuit board 3B.

[0244] As Figure 4 shown, in the first embodiment, the upper blocking member 64 is set to have a width W64 wider than the width corresponding to the above-mentioned part of the surface of the substrate 31B of the circuit board 3B.

[0245] Accordingly, in the image forming apparatus 10, for example, compared with the case where the upper blocking member 64 is set to have a width We that is narrower than the width W4, which is the maximum width of the housing 261, i.e., the structure 5D, and a part of the surface of the substrate 31B of the circuit board 3B is inside the width We, it is possible to prevent the dropped article 9 from entering the gap S2.

[0246] Specifically, it is possible to prevent the article 9 that has fallen toward the portion of the width We corresponding to the above-mentioned part of the surface of the substrate 31B of the circuit board 3B from entering through the portion of the width We of the gap S2.

[0247] Moreover, when observing the positional relationship between the circuit board 3A and the structure 5B, i.e., the rotation driving device 27, disposed at the closest position above it, they are arranged in the following positional relationship. That is, as Figure 4 shown, the circuit board 3A is arranged in the following positional relationship, i.e., the surface of its substrate 31A exists with a width that overlaps with the maximum width W2 of the rotation driving device 27 (refer to Figure 3 ) and is wider than the maximum width W2.

[0248] The maximum width W2 of the rotation driving device 27 can be set, for example, as the maximum width in the horizontal direction of its inspection opening 16.

[0249] When the circuit board 3A and the rotation driving device 27, which is the structure 5B, are arranged in the above-mentioned positional relationship, as Figure 4 shown, the upper blocking member 61 is preferably set, for example, such that its width W61 is at least a width that overlaps with the maximum width W2 of the structure 5B (refer to Figure 3 ) and is wider than the maximum width W2.

[0250] As Figure 4 shown, in the first embodiment, the upper blocking member 61 is set such that its width W61 is in a state of overlapping with the maximum width W2 of the structure 5B and is wider than the maximum width W2.

[0251] Accordingly, in the image forming apparatus 10, for example, compared with the case where the upper blocking member 61 is set to have a width W61 that is narrower than the maximum width W2 of the structure 5B, it is easier to prevent the dropped article 9 from entering the gap S1.

[0252] Specifically, the route by which the article 9 that has fallen due to the operation related to the structure 5B attempts to enter from the upper part of the gap S1 is accurately blocked by the upper blocking member 61, thereby preventing it from entering the gap S1.

[0253] In other words, when the upper blocking member 61 is set to have a width W61 that is narrower than the maximum width W2 of the structure 5B, there will be a portion above the gap S1 where the upper blocking member 61 does not exist, and the article 9 falling through this portion may enter the gap S1.

[0254] Moreover, as Figure 7 shown, both the upper blocking members 61 and 64 are set to have dimensions that are longer than the intervals (depth dimensions) E1 and E2 in the depth direction D of the gaps S1 and S2, respectively, in the depth direction D from the circuit boards 3A and 3B toward the mounting boards 4A and 4B.

[0255] In the first embodiment, the length L1 of the upper blocking member 61 along the depth direction D becomes a dimension longer than the interval E1 of the gap S1 (L1 > E1). Also, in the first embodiment, the length L2 of the upper blocking member 64 along the depth direction D becomes a dimension longer than the interval E2 of the gap S2 (L2 > E2).

[0256] Accordingly, in the image forming apparatus 10, it is easier to prevent the article 9 falling from above from entering the gaps S1 and S2 compared to the case where the upper blocking members 61 and 64 are set to have dimensions shorter than the intervals E1 and E2 that are also the depth dimensions of the gaps S1 and S2.

[0257] In other words, when the upper blocking members 61 and 64 are set to have dimensions shorter than the intervals E1 and E2 of the gaps S1 and S2, there will be portions above the gaps S1 and S2 where the upper blocking members 61 and 64 do not exist with respect to the depth direction D. Therefore, in this case, the article 9 that has fallen may enter the gaps S1 and S2 through the portions above the gaps S1 and S2 where the upper blocking members 61 and 64 do not exist. Regarding the portions above the gaps S1 and S2 where the upper blocking members 61 and 64 do not exist, the portions where gaps with widths through which the fallen article 9 can pass are formed are the main targets.

[0258] Furthermore, as Figure 7 shown, it can also be said that both the upper blocking members 61 and 64 are set in a state where the gaps S1 and S2 cannot be seen when viewed from above in the vertical direction.

[0259] Strictly speaking, the upper blocking member 61 is set in a state where a part of the gap S1 cannot be seen. However, the remaining part of the gap S2 is in a state where it cannot be seen due to the fan mounting frame 282 of the air blowing device 28.

[0260] Figure 7 The symbol W61 in (A) is the width of the upper blocking member 61 in the horizontal direction orthogonal to the depth direction D. And, Figure 7The symbol W64 in (B) is the width of the upper blocking member 64 in the horizontal direction orthogonal to the depth direction D.

[0261] Thus, in the image forming apparatus 10, as compared with the case where the upper blocking members 61 and 64 are arranged such that at least a part of the gaps S1 and S2 can be seen when viewed from above in the vertical direction, it is easier to prevent an article 9 falling from above from entering the gaps S1 and S2.

[0262] That is, when the upper blocking members 61 and 64 are arranged such that at least a part of the gaps S1 and S2 can be seen, there is a part above the gaps S1 and S2 where the upper blocking members 61 and 64 do not exist. Therefore, in this case, the falling article 9 may enter the gaps S1 and S2 through the part above the gaps S1 and S2 where the upper blocking members 61 and 64 do not exist. Regarding the part above the gaps S1 and S2 where the upper blocking members 61 and 64 do not exist at this time, the part where a gap having the same width as that in the above part is formed also becomes a main target.

[0263] And, as shown in (B) of Figure 8 the upper blocking member 64 has an end portion 64c through which the wiring cable 56 approaches or contacts and passes.

[0264] At this time, the upper blocking member 64 is preferably formed, for example, in a shape in which its end portion 64c is bent.

[0265] The bent shape is a shape in which the portion in contact with the wiring cable 56 is a rounded curved surface instead of a sharp corner. The bent shape is obtained by bending processing or the like. And the bent shape is usually bent downward, but it may also be bent upward.

[0266] Alternatively, the end portion 64c of the upper blocking member 64 may be formed in an end face shape having a rounded surface with a fillet.

[0267] Thus, as compared with the case where the end portion 64c is not bent, when the end portion 64c of the upper blocking member 64 is bent, the wiring cable 56 gently contacts the bent end portion 64c of the upper blocking member 64. Therefore, in this case, the possibility that the wiring cable 56 contacts the end portion 64c of the upper blocking member 64 and is damaged or cut is reduced.

[0268] In addition, in the image forming apparatus 10 as an example of the circuit board assembling apparatus 1, for example, the circuit board 3A is a circuit board that needs to be cooled.

[0269] And, as shown in Figure 9As shown in etc., the air supply fan 281 of the air supply device 28 is arranged to exist in a state overlapping with a part above the upper end of the circuit board 3A.

[0270] At this time, the blocking member 6 is preferably arranged to exist at least in a part of the upper end of the substrate 31A of the circuit board 3A that needs to be cooled, except for a part where the air supply fan 281 is overlappingly arranged.

[0271] As Figure 9 shown in etc., the upper blocking member 61 in Embodiment 1 is arranged to exist in a part of the upper end of the substrate 31A of the circuit board 3A, except for a part where the air supply fan 281 is overlappingly arranged.

[0272] Moreover, in a part of the fan mounting frame 282 of the air supply device 28 that overlappingly arranges with the upper end of the substrate 31A of the circuit board 3A, there is formed an unillustrated air-permeable opening connected to at least the mounting surface 31e (refer to Figure 2 ) side of the substrate 31A of the circuit board 3A.

[0273] Thus, in the image forming apparatus 10, airflows K1, K2, etc. that flow through the circuit board 3A are generated by the suction force based on the driving of the air supply fan 281. As a result, in the image forming apparatus 10, the circuit board 3A that needs to be cooled is cooled by the airflow generated by the air supply fan 281.

[0274] In other words, in the case where the blocking member 6 is not arranged in the upper part of the upper end of the circuit board 3A that needs to be cooled, except for a part where the air supply fan 281 is overlappingly arranged, sometimes the following bad situation may occur.

[0275] That is, in this case, as Figure 9 illustrated by the two-dot chain line arrow Kx in, a part (Kx) of the airflow generated by the driving of the air supply fan 281 does not flow toward the air supply fan 281 side, but flows in a manner of leaking from a part of the upper end of the circuit board 3A. Therefore, in this case, the circuit board 3A cannot be effectively cooled by the airflow generated by the air supply fan 281.

[0276] Incidentally, in the image forming apparatus 10, in addition to providing the upper blocking member 61 for the circuit board 3A that needs to be cooled, a left-side blocking member 62 and a right-side blocking member 63 are also provided.

[0277] Therefore, the airflow generated by the air supply fan 281 will easily flow by using the space between the left blocking member 62 and the right blocking member 63 as a ventilation duct. As a result, in the image forming apparatus 10, compared with the case where the left blocking member 62 and the right blocking member 63 are not provided, the circuit board 3A that needs to be cooled can be cooled more efficiently by the airflow generated by the air supply fan 281.

[0278] And, as shown in (B) of Figure 1 , in the image forming apparatus 10 which is an example of the circuit board assembling apparatus 1, there is provided a rear cover body 12r which is an example of an opposed plate and is arranged in a state facing the circuit board 3A that needs to be cooled (refer to Figure 1 (B)).

[0279] In this case, for example, it is preferable to provide air vents in at least a part of the area of the rear cover body 12r facing the circuit board 3A through which external air (external gas) can be taken in.

[0280] In the first embodiment, as exemplified in Figure 9 , air vents 18 are provided in the lower area in the vertical direction in the rear cover body 12r.

[0281] The air vents 18 may be through holes such as punched holes, or may be slit-shaped openings or air vents made of a mesh-like porous material.

[0282] Thus, in the image forming apparatus 10 provided with the air vents 18, compared with the case where air vents 18 are not provided in at least a part of the area of the rear cover body 12r which is an example of an opposed plate and faces the circuit board 3A that needs to be cooled, external air, that is, external gas, easily enters from the air vents 18 toward the circuit board 3A due to the suction force generated by the driving of the air supply fan 281.

[0283] As a result, in the image forming apparatus 10, the circuit board 3A that needs to be cooled can be cooled by using external gas.

[0284] Embodiment 2. Figure 10 The main part of the circuit board assembling apparatus 1B according to the second embodiment of the present invention is shown.

[0285] As the circuit board 3, the circuit board assembling apparatus 1B has a front - side circuit board 3D arranged on the front - side closest to the outside and a rear - side circuit board 3E arranged on the inner side closer than the front - side circuit board 3D and hardly visually recognizable from the outside.

[0286] Similar to the case of the circuit board 3A in Embodiment 1, the front-side circuit board 3D is composed of a substrate 31D and circuit components 32D. Similarly, the back-side circuit board 3E is also composed of a substrate 31E and circuit components 32E.

[0287] Moreover, as the mounting plate 4, the circuit board assembly device 1B has a front-side mounting plate 4D for mounting the front-side circuit board 3D and a back-side mounting plate 4E for mounting the back-side circuit board 3E.

[0288] Furthermore, in the circuit board assembly device 1B, a structure 5 that requires operation is disposed above the front-side circuit board 3D and the back-side circuit board 3E.

[0289] Then, in the circuit board assembly device 1B, as Figure 10 shown, a front-side upper blocking member 6A is provided.

[0290] The front-side upper blocking member 6A is a member that blocks at least a part of the route to the upper end of the gap S4 between the front-side circuit board 3D and the front-side mounting plate 4D for an article 9 falling from above.

[0291] Moreover, the front-side upper blocking member 6A is disposed at the upper end of the front-side mounting plate 4D facing the gap S4 between the front-side circuit board 3D and the back-side circuit board 3E.

[0292] Furthermore, the front-side upper blocking member 6A is disposed in such a state that it stands up from the front-side mounting plate 4D and crosses over the upper end of the substrate 31D of the front-side circuit board 3D so as to be close to or in contact with the upper end of the substrate 31D of the front-side circuit board 3D.

[0293] And, as Figure 10 shown, an intermediate blocking member 6M is additionally provided in the circuit board assembly device 1B.

[0294] As Figure 10 shown, the intermediate blocking member 6M is a member that blocks at least a part of the first inner route H10 to the upper end of the gap S10 between the front-side mounting plate 4D and the back-side circuit board 3E for an article 9 falling from above.

[0295] Moreover, the intermediate blocking member 6M is disposed on the surface of the front-side mounting plate 4D opposite to the surface where the front-side upper blocking member 6A is disposed.

[0296] Furthermore, the intermediate blocking member 6M is disposed in such a state that it stands up from the front-side mounting plate 4D and reaches the upper end of the substrate 31E of the back-side circuit board 3E so as to be close to or in contact with the upper end of the substrate 31E of the back-side circuit board 3E.

[0297] Accordingly, in the circuit board assembly device 1B, compared with the case where the intermediate blocking member 6 is not additionally provided as the blocking member 6M, it is also possible to prevent the article 9 dropped due to the operation of the structure 5 from entering the gap S10.

[0298] Incidentally, by the front upper blocking member 6A, it is possible to prevent the dropped article 9 from entering the gap S4. Moreover, both the front upper blocking member 6A and the intermediate blocking member 6M are arranged in at least a part of the range from the structure 5 to the front circuit board 3D and the inner circuit board 3E.

[0299] In the second embodiment, as the blocking member 6, as Figure 10 shown by the double-dashed line in

[0300] as Figure 10 shown, the inner upper blocking member 6B is a member that blocks at least a part of the second route H20 leading to the gap S5 between the inner circuit board 3E and the inner mounting plate 4E of the article 9 dropped from above.

[0301] Moreover, the inner upper blocking member 6B is provided at the upper end of the inner mounting plate 4E. Further, the inner upper blocking member 6B is provided in a state where it stands up from the inner mounting plate 4E and overlaps a part of the upper surface of the intermediate upper blocking member 6M so as to be close to or in contact with the upper surface of the intermediate upper blocking member 6M.

[0302] In addition, the inner upper blocking member 6B is arranged in at least a part of the range from the structure 5 to the front circuit board 3D and the inner circuit board 3E.

[0303] Accordingly, in the circuit board assembly device 1B provided with the inner upper blocking member 6B, compared with the case where the inner upper blocking member 6B is not additionally provided as the blocking member 6, it is also possible to prevent the article 9 dropped due to the operation of the structure 5 from entering the gap S5.

[0304] Modification. The present invention is not limited to the structural examples shown in the first and second embodiments, and includes contents such as necessary changes, combinations, etc., as long as the gist of each invention described in the claims is not deviated from. Therefore, the present invention includes, for example, the following modifications.

[0305] The blocking member 6 is not limited to having a rectangular planar shape such as the upper blocking members 61 and 64. That is, if the route H of the dropped article 9 to each gap S can be blocked, the blocking member 6 can be formed in various planar shapes.

[0306] Further, if the route H of the falling object 9 to each gap S can be blocked, the blocking member 6 can be, for example, in a form having an opening portion in a part or in a form constituted by a porous member.

[0307] Further, with regard to the upper blocking members 61 and 6A, as Figure 11 illustrated, it can also be configured to have an upper surface portion 61s (6As) constituted by a lower inclined surface, and the lower inclined surface inclines downward as it passes through the circuit boards 3A and 3D from the mounting plates 4A and 4D and moves away.

[0308] The upper surface portion 61s (6As) is not limited to a structure in which only the upper surface is formed as a lower inclined surface. For example, the upper surface portion 61s (6As) can also be configured such that the entire upper blocking members 61 and 6A are disposed in a state inclined downward, and the upper surface at this time becomes a lower inclined surface.

[0309] In the case of the upper blocking members 61 and 6A having the upper surface portion 61s (6As), as Figure 11 illustrated, when the object 9 falling due to the operation of the structure 5 reaches the upper blocking members 61 and 6A, it falls due to the inclination of the upper surface portion 61s (6As) constituted by the lower inclined surface.

[0310] Moreover, with regard to the upper blocking members 61 and 6A, as Figure 12 illustrated, it can also be configured to have an upper surface portion 61q (6Aq) having an upper inclined surface portion 65 inclined upward at an end portion away from the mounting plates 4A and 4D.

[0311] Figure 12 The symbol 3F in is a lower side circuit board disposed at a position below the circuit board 3A or the circuit board 3D. Circuit components 32F are mounted on the substrate 31F of the lower side circuit board 3F. Further, the lower side circuit board 3F is mounted on the mounting plate 4F with a gap S6 therebetween.

[0312] In Embodiments 1 and 2, as Figure 13 shown in (A), as the upper blocking members 61, 64, and 6A of the blocking member 6, it can also be arranged to be within a range Pd of the lower half portion excluding the intermediate position Pm between the structure 5 and the circuit board 3.

[0313] Further, as Figure 13 shown in (B), with regard to the upper blocking members 61, 64, and 6A of the blocking member 6, it can also be arranged to be within a range Pu of the upper half portion including the intermediate position Pm between the structure 5 and the circuit board 3.

[0314] Further, in Embodiment 1 and the like, an image forming apparatus 10 is shown as an example of the circuit board assembly apparatus 1, but the circuit board assembly apparatus 1 of the present invention is not limited to the image forming apparatus 10. That is, as described above, the circuit board assembly apparatus 1 of the present invention may be any apparatus that at least assembles a circuit board 3, a mounting board 4, and a structure 5.

[0315] As another example of the circuit board assembly apparatus 1, for example, home appliances and the like can be cited.

[0316] Moreover, the circuit board 3, the mounting board 4, the structure 5, and the blocking member 6 are not limited by the structures such as the number, type, positional relationship, and shape exemplified in Embodiments 1, 2, and the like.

[0317] Further, in Embodiment 1 and the like, a structure in which the blocking member 6 is provided on the mounting board 4 of the circuit board 3 is exemplified, but for example, it may also be provided on other members such as a structural frame for mounting the circuit board 3.

[0318] Furthermore, regarding the upper blocking members 61, 64, etc. of the blocking member 6, a structure in which a flat plate-shaped member is provided in a substantially horizontal state as exemplified in Embodiment 1 and the like is exemplified, but it is not limited thereto.

[0319] The upper blocking member 61 and the like can be provided, for example, in a state where the entire upper surface thereof is an inclined surface inclined toward the side where the object is to move, so as to guide the falling object 9. And the upper blocking member 61 and the like can also be an upper blocking member in which a part of the upper surface thereof is formed as an inclined surface inclined downward, or an upper blocking member having a zigzag shape like a mountain shape.

[0320] (Supplementary Note) (1)

[0322] A circuit board assembly apparatus, comprising:

[0323] A circuit board;

[0324] A mounting board for mounting the circuit board;

[0325] A structure, disposed above the circuit board and requiring operation; and

[0326] A blocking member, provided in at least a part of the range from the structure to the circuit board, and blocking at least a part of the route for the object falling from above through the operation to the gap between the circuit board and the mounting board. (2)

[0328] The circuit board assembly apparatus according to (1), wherein

[0329] The circuit board is arranged in a positional relationship such that a plane intersecting the depth direction from the circuit board toward the mounting board lies inside the maximum width in the horizontal direction of the portion of the structure intersecting the depth direction.

[0330] The blocking member is provided with a width greater than or equal to the width corresponding to the maximum width in the horizontal direction of the plane of the circuit board intersecting the depth direction. (3)

[0332] According to the circuit board assembly device described in (1), wherein

[0333] The circuit board is arranged in a positional relationship such that a part of the plane intersecting the depth direction from the circuit board toward the mounting board lies inside the maximum width in the horizontal direction of the portion of the structure intersecting the depth direction.

[0334] The blocking member is provided with a width greater than or equal to the width corresponding to the part of the plane of the circuit board. (4)

[0336] According to the circuit board assembly device described in (1), wherein

[0337] The circuit board is arranged in a positional relationship such that the plane intersecting the depth direction from the circuit board toward the mounting board overlaps with the maximum width in the horizontal direction of the portion of the structure intersecting the depth direction and exists with a width wider than the maximum width.

[0338] The blocking member is provided with a width greater than or equal to the maximum width of the structure. (5)

[0340] According to the circuit board assembly device described in any one of (1) to (4), wherein the blocking member is arranged within a range of the lower half portion excluding the intermediate position between the structure and the circuit board. (6)

[0342] According to the circuit board assembly device described in any one of (1) to (5), wherein

[0343] The blocking member is arranged in the depth direction horizontally from the circuit board toward the mounting board with a dimension longer than the depth dimension of the gap. (7)

[0345] According to the circuit board assembly device described in any one of (1) to (6), wherein

[0346] The blocking member is arranged in a state such that the gap cannot be seen when viewed from above in the vertical direction. (8)

[0348] The circuit board assembly device according to any one of claims (1) to (7), wherein,

[0349] The blocking member has an upper surface portion, and the upper surface portion is composed of a lower inclined surface that slopes downward as it passes through the circuit board from the mounting plate and moves away. (9)

[0351] The circuit board assembly device according to any one of (1) to (8), wherein,

[0352] The blocking member has an upper surface portion, and the upper surface portion has an upper inclined surface portion that slopes upward at an end portion away from the mounting plate. (10)

[0354] The circuit board assembly device according to any one of (1) to (9), wherein,

[0355] The blocking member has an end portion through which a wiring cable approaches or contacts and passes, and the end portion is formed in a bent shape. (11)

[0357] The circuit board assembly device according to any one of (1) to (10), wherein,

[0358] As the circuit board, there is a front - side circuit board disposed on the front - side closest to the outside and a back - side circuit board disposed deeper than the front - side circuit board and hardly visually recognizable from the outside.

[0359] As the mounting plate, there is a front - side mounting plate for mounting the front - side circuit board and a back - side mounting plate for mounting the back - side circuit board.

[0360] As the blocking member, an intermediate blocking member is additionally provided in at least a part of the range from the structure to the front - side circuit board and the back - side circuit board, and the intermediate blocking member blocks at least a part of an inner first route leading to a gap between the front - side mounting plate and the back - side circuit board for an object falling from above. (12)

[0362] The circuit board assembly device according to (11), wherein,

[0363] As the blocking member, a back - side blocking member is additionally provided in at least a part of the range from the structure to the front - side circuit board and the back - side circuit board, and the back - side blocking member blocks at least a part of an inner second route leading to a gap between the back - side circuit board and the back - side mounting plate for an object falling from above. (13)

[0365] The circuit board assembly device according to any one of (1) to (12), wherein,

[0366] As the circuit board, there is a circuit board that needs to be cooled.

[0367] The circuit board assembly device is provided with a blower fan, and the blower fan is arranged in a state of overlapping above a part of the upper end of the circuit board that needs to be cooled.

[0368] The blocking member is arranged to exist at least in a part other than the above-mentioned part of the upper end of the circuit board that needs to be cooled. (14)

[0370] The circuit board assembly device according to (13) includes:

[0371] An opposing plate is arranged in a state of facing the circuit board that needs to be cooled.

[0372] At least a part of the area of the opposing plate that faces the circuit board that needs to be cooled is provided with ventilation holes. (15)

[0374] The circuit board assembly device according to any one of (1) to (14), wherein,

[0375] The structure is arranged in a state where a first imaginary plane that virtually extends downward in the vertical direction from the part that needs to be operated overlaps at least a part of the gap, or is arranged at a position behind the gap. (16)

[0377] The circuit board assembly device according to any one of (1) to (15), wherein,

[0378] The structure is arranged at a position behind the circuit board. (17)

[0380] The circuit board assembly device according to (16), wherein,

[0381] The structure is arranged at a position behind a second imaginary plane that virtually extends upward in the vertical direction from the upper end of the circuit board.

[0382] Compared with the case where no blocking member is provided, the circuit board assembly device according to (1) can prevent an item that falls from above during operation from entering the gap between the circuit board and the mounting board, and the blocking member blocks at least a part of the route of the item leading to the gap.

[0383] Regarding the circuit board assembly device according to (2), compared with the case where the blocking member is provided with a width narrower than the width corresponding to the maximum width of the circuit board, it is possible to prevent the dropped object from entering the gap between the circuit board and the mounting board.

[0384] Regarding the circuit board assembly device according to (3), compared with the case where the blocking member is provided with a width narrower than the width at which a part of the surface of the circuit board intersecting the depth direction is inside the maximum width of the structure, it is possible to prevent the dropped object from entering the gap between the circuit board and the mounting board.

[0385] Regarding the circuit board assembly device according to (4), compared with the case where the blocking member is provided with a width narrower than the maximum width of the structure, it is easier to prevent the dropped object from entering the gap between the circuit board and the mounting board.

[0386] Regarding the circuit board assembly device according to (5), compared with the case where the blocking member is arranged in the lower half range that does not include the middle position, for the dropped object, it is possible to block the route to the gap between the circuit board and the mounting board at an early stage of the start of dropping.

[0387] Regarding the circuit board assembly device according to (6), compared with the case where the blocking member is provided with a size shorter than the depth dimension of the gap, it is easier to prevent the object dropped from above from entering the gap between the circuit board and the mounting board.

[0388] Regarding the circuit board assembly device according to (7), compared with the case where the blocking member is arranged in a state where at least a part of the gap can be seen when observing the blocking member from above in the vertical direction, it is easier to prevent the object dropped from above from entering the gap between the circuit board and the mounting board.

[0389] Regarding the circuit board assembly device according to (8), compared with the case where the blocking member does not have an upper surface portion formed by a lower inclined surface, the object falling on the blocking member does not stay on the upper surface portion of the blocking member.

[0390] Regarding the circuit board assembly device according to (9), compared with the case where the blocking member does not have an upper surface portion having an upper inclined surface portion when two or more circuit boards are arranged in a vertically staggered manner below the blocking member, it is possible to suppress the object falling on the blocking member from staying and falling again.

[0391] Regarding the circuit board assembly device according to (10), compared with the case where the end portion of the blocking member where the wiring cable approaches, contacts, and passes through is formed in a bent shape, the possibility of damage due to contact between the wiring cable and the end portion of the blocking member is reduced.

[0392] According to the circuit board assembly device related to (11), compared with the case where no intermediate blocking member is additionally provided as a blocking member, it is also possible to prevent the dropped object from entering the gap between the front-side mounting plate and the inner circuit board.

[0393] According to the circuit board assembly device related to (12), compared with the case where no inner blocking member is additionally provided as a blocking member, it is also possible to prevent the dropped object from entering the gap between the inner circuit board and the inner mounting plate.

[0394] According to the circuit board assembly device related to (13), compared with the case where no blocking member is provided above the upper end of the circuit board that needs to be cooled except for a part where the air supply fan is overlapped and arranged, it is possible to easily cool the circuit board that needs to be cooled by the airflow generated by the air supply fan.

[0395] According to the circuit board assembly device related to (14), compared with the case where no ventilation holes are provided in at least a part of the area of the opposed plate facing the circuit board that needs to be cooled, it is easy to cool the circuit board that needs to be cooled with external gas.

[0396] According to any of the circuit board assembly devices related to (15) to (17), even when performing operations related to the structure, it is possible to prevent the dropped object due to the operation from entering the gap between the circuit board and the mounting plate.

[0397] The above embodiments of the present invention are provided for the purpose of illustration and description. In addition, the embodiments of the present invention do not comprehensively and exhaustively cover the present invention and do not limit the present invention to the disclosed manner. Obviously, various deformations and changes are self-evident to those skilled in the art to which the present invention pertains. This embodiment is selected and described to most easily explain the principle of the present invention and its applications. Thus, other technicians in this technical field can understand the present invention through various deformation examples optimized for specific uses assumed to be various embodiments. The scope of the present invention is defined by the above claims and their equivalents.

Claims

1. A circuit board assembly device, comprising: Circuit boards; A mounting plate for mounting the circuit board; A structure, which is disposed above the circuit board and requires operation; and A blocking member is provided at least partially in a range from the structure to the circuit board, and blocks at least partially a route of an object dropped from above during the operation to a gap between the circuit board and the mounting plate.

2. The circuit board assembly device according to claim 1, wherein: The circuit board is arranged in a positional relationship such that a surface intersecting a depth direction from the circuit board toward the mounting plate exists inside a maximum width in a horizontal direction of a portion of the structure intersecting the depth direction. The blocking member is provided with a width equal to or greater than a maximum width in a horizontal direction of a surface of the circuit board intersecting the depth direction.

3. The circuit board assembly device according to claim 1, wherein: The circuit board is arranged in a positional relationship such that a portion of a surface intersecting a depth direction from the circuit board toward the mounting plate exists inside a maximum width in a horizontal direction of a portion of the structure intersecting the depth direction. The blocking member is provided to have a width equal to or greater than a width corresponding to a portion of the surface of the circuit board.

4. The circuit board assembly device according to claim 1, wherein: The circuit board is arranged in a positional relationship such that a surface intersecting the depth direction from the circuit board toward the mounting plate overlaps with the maximum width in the horizontal direction of a portion of the structure intersecting the depth direction and exists with a width wider than the maximum width. The blocking member is provided with a width greater than the maximum width of the structure.

5. The circuit board assembly device according to any one of claims 1 to 4, wherein: The blocking member is provided in a range of a lower half excluding a middle position between the structure and the circuit board.

6. The circuit board assembly device according to any one of claims 1 to 5, wherein: The blocking member is provided with a dimension longer than a depth dimension of the gap in a depth direction horizontally from the circuit board toward the mounting plate.

7. The circuit board mounting device according to any one of claims 1 to 6, wherein: The blocking member is disposed in a state where the gap is not visible due to the blocking member when viewed from the upper side to the lower side in the vertical direction.

8. The circuit board mounting device according to any one of claims 1 to 7, wherein: The blocking member has an upper surface portion, and the upper surface portion is composed of a downward slope that inclines downward as it passes through the circuit board from the mounting plate and moves away from the circuit board.

9. The circuit board mounting device according to any one of claims 1 to 8, wherein: The blocking member has an upper surface portion, and the upper surface portion includes an upper slope portion inclined upward at an end portion away from the mounting plate.

10. The circuit board mounting device according to any one of claims 1 to 9, wherein: The blocking member has an end portion to which the distribution cable approaches or contacts and passes, and the end portion is bent.

11. The circuit board mounting device according to any one of claims 1 to 10, wherein: The circuit board includes a front side circuit board arranged on the front side that is first exposed to the outside and a back side circuit board arranged on the back side of the front side circuit board and difficult to be visually recognized from the outside. As the mounting plate, there are a front mounting plate for mounting the front circuit board and a back mounting plate for mounting the back circuit board. As the blocking component, an intermediate blocking component is additionally provided in at least a portion of the range from the structure to the near-front circuit board and the inner circuit board, and the intermediate blocking component blocks at least a portion of the inner first route from objects falling from above to the gap between the near-front mounting plate and the inner circuit board.

12. The circuit board assembly device according to claim 11, wherein: As the blocking component, an inner blocking component is additionally provided in at least a portion of the range from the structure to the near-front circuit board and the inner circuit board, and the inner blocking component blocks at least a portion of the inner second route to the gap between the inner circuit board and the inner mounting plate from objects falling from above.

13. The circuit board mounting device according to any one of claims 1 to 12, wherein: As the circuit board, there is a circuit board that needs to be cooled, The circuit board mounting device includes an air supply fan, the air supply fan being arranged in a state of overlapping above a portion of an upper end of the circuit board to be cooled. The blocking member is provided so as to exist at least in a portion other than the portion of the upper end of the circuit board to be cooled.

14. The circuit board assembly device according to claim 13, comprising: The opposing plate is arranged to face the circuit board to be cooled. At least a portion of a region of the opposing plate that faces the circuit board to be cooled is provided with ventilation holes.

15. The circuit board mounting device according to any one of claims 1 to 14, wherein: The structure is arranged in a state where a first imaginary plane virtually extending vertically downward from the portion requiring work overlaps at least a portion of the gap or is arranged to exist behind the gap.

16. The circuit board mounting device according to any one of claims 1 to 15, wherein: The structure is arranged at a rearward position relative to the circuit board.

17. The circuit board assembly device according to claim 16, wherein: The structure is arranged at a rearward position relative to a second imaginary plane that virtually extends upward in a vertical direction from an upper end of the circuit board.

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