JP2014223979A5 - Opening / closing device, cooling device, recording medium conveying device, and image forming apparatus - Google Patents

Description

The present invention relates to an opening / closing device, a cooling device, a recording medium conveying device, and an image forming apparatus, and more particularly, to an image forming apparatus such as a copying machine, a facsimile machine, a printer, a plotter, or a multifunction machine having a plurality of functions. The present invention relates to a cooling device provided in an opening / closing device, a switching device, or a recording medium conveying device provided with the cooling device .

In the case of the positioning configuration of Patent Document 1, since the roller shaft is configured to be pressed and inserted while applying an urging force to the concave portion, the roller shaft is forcibly inserted into the concave portion by the reaction force at that time. There is a risk that the roller will bend. Therefore, even if it is possible to prevent the automatic document feeder from being obliquely attached to the image reading unit, the document may be skewed due to the deflection of the roller. Further, in the configuration of Patent Document 1, it is possible to restrict the position in the vertical direction when viewed from the front of FIG. 5 of the same publication and the position in the rotational direction when viewed from the upper surface by the recess, but from the front. The position in the viewed rotation direction cannot be regulated.
Therefore, when the positioning configuration of Patent Document 1 is applied to the opposite conveying belt as in Patent Document 2, the applied pressure (clamping pressure) in the sheet conveying direction varies, and the conveyance is not stable. For example, as shown in FIG. 23, if the right side of one of the conveyor belts 30A is inclined upward with respect to the other conveyor belt 30B, the clamping pressure F1> the clamping pressure F2. In FIG. 23 , F1 is the clamping pressure between the left conveying belts 30A and 30B, F2 is the clamping pressure between the right conveying belts 30A and 30B, and C is the sheet conveying direction as the recording medium conveying direction . Each is shown.

To achieve the above Symbol object, the present onset Ming has one conveyor belt and the other conveyor belt of which opposite capable conveying the recording medium by holding one of the transport unit with a conveyor belt of the one is In the opening / closing device that can be opened / closed with respect to the other transport unit having the other transport belt, the one transport unit or the other transport unit is provided on one side in a direction intersecting a recording medium transport direction, A swing shaft that supports the transport belt toward the other transport belt so that the transport belt can be approached and separated from the other transport belt, and a first shaft of the swing shaft in the one transport unit . a second rotational direction regulations you regulate system portion in the rotational direction and the direction crossing the provided on the other side, the position of the opposite direction and the other transport unit of the one conveying unit fixed That a fixed portion, wherein the fixing unit includes the recording medium upstream restraining portion upstream side and provided on both sides of the downstream side to fix the position of the opposite direction of the conveying direction and the downstream-side restraining portion, The restricting portion is arranged between the upstream restricting portion and the downstream restricting portion .

According to the present invention, it is possible to make the holding pressure between the conveying belts in the recording medium conveying direction uniform in the opposed conveying belts.

In the image forming apparatus main body 200, a transport path R for transporting the recording material P from each paper feed cassette 13 to the paper discharge tray 20 through the secondary transfer nip is disposed. In the conveyance path R, a registration roller 15 is disposed upstream of the position of the secondary transfer roller 12 in the sheet conveyance direction. Further, on the downstream side in the sheet conveyance direction from the position of the secondary transfer roller 12, a fixing device 8, a sheet conveyance device 9 as a recording medium conveyance device provided with a cooling unit, and a pair of discharge rollers 16 are sequentially arranged. Yes. The fixing device 8 includes, for example, a fixing roller 17 as a fixing member having a heater (not shown) therein, and a pressure roller 18 as a pressure member that presses the fixing roller 17. A fixing nip is formed at a position where the fixing roller 17 and the pressure roller 18 are in contact with each other.

The first transport mechanism 31 includes a plurality of (four in the illustrated example) driven rollers 55 (rollers 55 a, 55 b, 55 c, and 55 d shown in parentheses in the figure) and the rollers 55. And a conveyor belt 56 that is an endless belt that is wound around. The second transport mechanism 32 includes a plurality of (three in the illustrated example) driven rollers 57c, 57d, and 58, a driving roller 57a, and an endless shape wound around these rollers 57 and the driving roller 57a. Tei and a transport belt 59 which is a belt Ru. The transport belt 56 functions as one transport belt in the present invention, and the transport belt 59 functions as the other transport belt in the present invention.

The upper unit 60 is configured to be openable and closable with respect to the lower unit 80. Specifically, the upper unit 60 is configured to be substantially swingable and openable / closable with the back side intersecting and orthogonal to the paper surface of the lower unit 80 as a swing fulcrum portion. The upper unit 60 has a function as “one transport unit” in the present invention, and the lower unit 80 has a function as “the other transport unit” in the present invention. In FIG. 1, the front side or the front side intersecting or orthogonal to the paper surface is also referred to as “front side”, and the back side is also referred to as “rear side”. 1 is the “one side” in the present invention, and the front of FIG. 1 is the “other side”. Both of these are referred to as “both sides”.

A grip portion 69 that is gripped when the user releases the lock is fixed to the center upper portion of the lever shaft 68. Lock levers 67 each having a substantially U-shaped engaging recess 67a are fixed to both ends of the lever shaft 68 on both the upstream side and the downstream side along the sheet conveyance direction C. Yes. The engaging recess 67 a engages (means to be engaged with) both the upstream side and the downstream side along the sheet conveyance direction C in the front shaft 83 disposed on the front plate 81 side, and is engaged with the upper unit 60. It functions as an upstream-side restraining portion and a downstream-side restraining portion that fixes the position of the arranged first transport mechanism 31 in the facing direction.

What has been described above is an example, and the present invention has a specific effect for each of the following aspects.
[Aspect 1]
It has one other conveyor belts, such as conveyor belt and the conveyor belt 59, such as the conveying belt 56 that faces capable conveying the recording medium by holding such a recording material P, such as on the unit 60 with one conveyor belt In an opening / closing device such as the opening / closing device 100 in which one conveyance unit can be opened / closed with respect to the other conveyance unit such as the lower unit 80 having the other conveyance belt , the sheet conveyance direction C in one conveyance unit or the other conveyance unit, etc. A swinging shaft such as a rear shaft 63 provided on one side such as a rear side in a direction crossing the recording medium conveyance direction, and supporting one conveyance belt toward and away from the other conveyance belt. provided on the other side, such as the opposite side of the front and side directions of times crossing the first direction of rotation, such as the rotation direction R1 of the pivot axis in one transport unit A regulating portion, such as a second rotational direction regulation to that regulation pin 86 and the recess 61b, such as the direction R2, provided on the other side, to fix the position of the opposing direction of the other transport unit of one of the transport unit A fixing unit such as a lock mechanism 65, and the fixing unit is provided on both the upstream side and the downstream side in the recording medium conveyance direction, and the upstream side restraint unit and the downstream side such as an engaging recess 67a that fixes the position in the opposing direction. The restricting portion is disposed between the upstream restricting portion and the downstream restricting portion.

According to the aspect 1, as described in the above-described embodiment, there is a basic effect that it is possible to make the clamping pressure between the conveying belts in the recording medium conveying direction uniform in the opposed conveying belts.

[Aspect 2]
In the aspect 1, the restricting portions such as the restricting pin 86 and the recessed portion 61b are arranged along the recording medium conveyance direction from the center such as the center position CL of the latch of the lock mechanism 65 between the upstream restricting portion and the downstream restricting portion. They are offset.
According to the aspect 2, as explained in the above embodiment, it contributes to reliably producing the effect of the aspect 1.

[Aspect 3]
In the aspect 1 or 2, the restricting portion includes a concave portion such as a concave portion 61b formed in a flat plate portion provided in one of the one conveyance unit and the other conveyance unit, and one conveyance unit and the other conveyance unit. It is comprised by convex parts, such as the limitation pin 86 which is provided in either one and fits into a recessed part .
According to Aspect 3, as described in the above embodiment, it contributes to reliably producing the effect of Aspect 1.

[Aspect 4]
Oite the embodiment 3, the convex portion is a cylindrical shape protruding toward the one of the transport unit to one of the transport unit from the other transport unit or the other of the transport unit, a shape that the tip is tapered.
According to the aspect 4, as explained in the above embodiment, it contributes to reliably producing the effect of the aspect 1.

[Aspect 5]
In the aspect 4, the concave portion is fitted on the cylindrical outer periphery of the convex portion .
According to the aspect 5, as explained in the above embodiment, it contributes to reliably producing the effect of the aspect 1.

[Aspect 6]
Oite the embodiment 4, the recess is formed along the belt surface of the conveyance unit is fitted with a cylindrical outer circumference of the convex portion.
According to the aspect 6, as explained in the above embodiment, it contributes to reliably producing the effect of the aspect 1.

[Aspect 7]
The transport unit includes the opening / closing device according to any one of aspects 1 to 6, which includes cooling members such as cooling members 33a and 33b that contact the inner peripheral surface of the transport belt and cool the transported recording medium. It is a cooling device provided.
According to the aspect 7, as described in the above embodiment , both surfaces of the recording medium can be cooled.

[Aspect 8]
In the recording medium conveying apparatus such as the sheet conveying apparatus 9 having conveying belts such as opposed conveying belts 56 and 59 that can convey while sandwiching the recording medium, the opening / closing device 100 according to any one of aspects 1 to 6 and the like Opening and closing device is provided.
According to Aspect 8, as described in the above embodiment, the effect of Aspect 1 is achieved by the recording medium transport device .

[Aspect 9]
An image forming unit such as process units 1Y, 1C, 1M, and 1Bk that forms an image on a recording medium such as the recording material P, and a recording medium conveying device according to aspect 8 that conveys the recording medium that has passed through the image forming unit. An image forming apparatus provided .
According to the aspect 9, as described in the above embodiment, the effect of the aspect 1 is achieved by the image forming apparatus including the recording medium conveyance device according to the aspect 8.

1Y, 1C, 1M, 1Bk process unit (an example of an image forming unit)
2 Photoconductor (an example of a latent image carrier, an image carrier)
3 Charging roller (an example of charging means)
4. Developing device (an example of developing means)
5 Cleaning blade (an example of cleaning means)
6 Exposure device (an example of exposure means)
7 Transfer device 8 Fixing device 9 Sheet transport device (an example of a recording medium transport device)
30 Belt conveying means 31 First conveying mechanism (constitutes one conveying belt)
32 Second transport mechanism (configures the other transport belt)
33a, 33b, 33c Cooling member 56 Conveying belt (an example of one conveying belt)
59 Conveyor belt (an example of the other conveyor belt)
60 Upper unit (an example of one transport unit)
61 Front side plate 61a Pin (an example of a defining means and a convex part)
61b Recessed part (an example of a restricting part)
62 Rear side plate 62a Pin (an example of a defining means and a convex part)
63 Rear shaft (an example of a rocking shaft)
64 Upper bracket (example of mounting part)
65 Lock mechanism (an example of a lock mechanism)
67a Engagement recessed part (an example of an upstream restraint part and a downstream restraint part )
70 Spring (pressure means, second pressure member)
73 Spring (Pressure means, first pressure member)
80 Lower unit (an example of the other transport unit)
81 Front side plate 81a Engagement surface (regulating means, contacted surface)
82 Rear side plate 82a Engagement surface (regulating means, contacted surface)
83 Front shaft 84 Lower bracket (Mounting part)
84a Rear shaft guide hole (an example of a guide part)
86 Restriction pin (an example of a restriction part or a convex part)
87a Front shaft guide hole (guide part)
100 Opening / closing device 200 Image forming apparatus main body C Sheet conveying direction (recording medium conveying direction)
P recording material (an example of a record medium)
R1 rotation direction (first rotation direction)
R2 rotation direction (second rotation direction)
Z Vertical direction

Claims (9)

Having one conveyor belt and the other conveyor belt of which opposite capable conveying the recording medium by holding, relative to the other transport unit, wherein the one transport unit having one conveyor belt having a conveyor belt of the other In an openable switchgear,
Swing provided on one side of the one conveyance unit or the other conveyance unit in a direction intersecting the recording medium conveyance direction, and supporting the one conveyance belt toward the other conveyance belt so as to be able to approach and separate. The axis,
And the one side provided on the other side of the opposite side, a first second regulation portion you restrict rotation direction of the rotation direction and a direction intersecting the pivot shaft in the one conveying unit,
Wherein provided on the other side, and a fixing unit for fixing the position of the opposite direction and the other transport unit of the one of the transport unit,
The fixing portion includes an upstream side restraining portion and a downstream side restraining portion that are provided on both the upstream side and the downstream side in the recording medium conveyance direction and fix the position in the facing direction,
The opening and closing device , wherein the restricting portion is disposed between the upstream restricting portion and the downstream restricting portion . 2. The switchgear according to claim 1, wherein the restricting portion is arranged to be shifted along the recording medium conveyance direction from a center between the upstream restricting portion and the downstream restricting portion . The restricting portion is provided in a concave portion formed in a flat plate portion provided in one of the one conveyance unit and the other conveyance unit, and in the other one of the one conveyance unit and the other conveyance unit. The opening / closing device according to claim 1 , wherein the opening / closing device comprises a protrusion and a protrusion that fits into the recess . The convex portion is a columnar shape protruding from the one conveyance unit to the other conveyance unit or from the other conveyance unit toward the one conveyance unit, and has a shape in which a tip is tapered. The switchgear according to claim 3 . The opening / closing device according to claim 4 , wherein the concave portion is fitted on the outer periphery of the columnar shape of the convex portion . Said recess, said formed along the belt surface of the conveyance unit, according to claim 4 Symbol mounting of the switchgear, characterized in that fitted in the cylindrical periphery of the convex portion. The opening / closing device according to claim 1, wherein the transport unit includes a cooling member that contacts an inner peripheral surface of the transport belt and cools the recording medium that is transported. Cooling device . In the recording medium conveying apparatus having the opposite conveying belt capable of conveying while sandwiching the recording medium,
A recording medium conveying apparatus comprising the opening / closing apparatus according to claim 1 . An image forming unit for forming an image on a recording medium;
The recording medium conveying apparatus according to claim 8, wherein the recording medium that has passed through the image forming unit is conveyed.
An image forming apparatus comprising:

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