JP4933231B2 - Image forming apparatus - Google Patents

Description

  The present invention relates to an image forming apparatus in which a scanner unit that reads an image of a document is provided in an openable and closable manner on an upper part of a printer unit that records an image on a recording material.

  In recent years, so-called in-cylinder discharge image forming apparatuses have been proposed for the purpose of saving the installation space. As shown in FIG. 11, this in-cylinder discharged image forming apparatus is used for stacking the recording material P discharged from the printer unit 52 between the printer unit 52 and the scanner unit 51 provided on the upper portion. A discharge stacking space 53 is provided.

  In such an image forming apparatus, the recording material P on which an image is formed is configured to be discharged and stacked on a discharge tray portion provided in the upper portion of the printer portion 52. The discharge tray section includes a top cover 66 that forms the exterior of the printer section 52, and a maintenance cover 64 that opens and closes for cartridge replacement and jam processing. Further, in such an image forming apparatus, the scanner unit 51 is configured to be openable and closable with respect to the printer unit 52 in order to make it easy to take out the recording material P discharged and stacked on the discharge tray unit of the space unit 53. ing.

  In such an image forming apparatus, in order to perform various maintenance operations on the printer unit 52, it is necessary to open the scanner unit 51 and then open the maintenance cover 64 on the upper side of the printer unit 52. In a normal use state, the scanner unit 51 is held in the closed position by the locking action of the lock mechanism. On the other hand, when performing the above-described maintenance work or the like, first, the locking mechanism is released, and then the scanner unit 51 is moved from the closed position to the open position. Thereby, the upper side of the printer unit 52 can be opened, and the maintenance cover 64 can be opened.

  On the other hand, Japanese Patent Laid-Open No. 2000-39827 (hereinafter referred to as Patent Document 1) discloses a configuration in which a scanner unit is opened in conjunction with an operation of opening a part of side walls constituting an exterior of an image forming apparatus. Is disclosed. According to Patent Document 1, the scanner unit is simultaneously rotated to the upper part of the apparatus in accordance with the opening of the side wall to the front of the apparatus, and a large open space from the outside of the printer unit is ensured. Improves sex.

JP 2000-39827 A

  However, in the conventional in-cylinder discharge image forming apparatus, in order to open the maintenance cover 64, it is necessary to first open the scanner unit 51. For this reason, when performing the above-described maintenance work or the like, the operator needs to release the lock mechanism of the scanner unit 51, open the scanner unit 51, and open the maintenance cover 64 in order. There is a problem that it takes time and effort.

  On the other hand, the image forming apparatus disclosed in Patent Document 1 is configured to open the scanner unit upward in conjunction with an operation of opening the side wall forming the apparatus exterior forward. However, in the above-described in-cylinder discharge image forming apparatus, Absent. Therefore, according to the image forming apparatus of Patent Document 1, it is possible to perform maintenance work from the upper side of the printer unit simply by opening the scanner unit on the printer unit. Even if the configuration disclosed in Patent Document 1 is applied to the above-described in-cylinder discharge image forming apparatus, it is the side wall and the scanner section that are open to the apparatus main body. The upper side of the printer unit is not opened. For this reason, maintenance work cannot be performed from above the printer unit.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an image forming apparatus in which a scanner unit can be freely opened and closed at an upper part of a printer unit so that a maintenance operation can be performed smoothly without waste with a relatively simple configuration and low cost. Is to be able to.

In order to achieve the above object, a typical configuration of the present invention includes a printer unit that records an image on a recording material, and an image of a document that is provided above the printer unit so as to be rotatable upward with respect to the printer unit. A scanner unit for reading the image, an opening / closing member that can be rotated upward with respect to the printer unit main body to open and close the inside of the printer unit, and a latch for locking the scanner unit to the printer unit so as not to rotate upward And an unlocking portion for releasing the locking by the locking member, and when the opening and closing member is opened, the opening and closing member contacts the locking releasing portion, The locking of the scanner unit by the locking member is released.

  According to the present invention, when the opening / closing member is opened, the locking of the scanner portion by the locking member is released, so that the operation when performing various maintenance operations can be performed smoothly without waste with a simple mechanism and low cost. be able to.

  Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. However, the dimensions, materials, shapes, and relative arrangements of the components described in the following embodiments should be appropriately changed according to the configuration of the apparatus to which the present invention is applied and various conditions. Therefore, unless specifically stated otherwise, the scope of the present invention is not intended to be limited thereto.

[First Embodiment]
1 and 2 are perspective views of the image forming apparatus according to the first embodiment as seen from the front right side of the apparatus. FIG. 2 shows a state in which the scanner unit 1 is closed with the document presser 4 closed. 3 is a main longitudinal sectional view of the state of FIG. 1, and FIG. 4 is a main longitudinal sectional view of the state of FIG. 5 and 6 are sectional views showing a state in which the scanner unit is opened in conjunction with the operation of opening the maintenance cover.

  As shown in FIGS. 1 to 6, the image forming apparatus includes a scanner unit 1 as an image reading unit that reads an image of a document on an upper part of a printer unit 2 as an image forming unit that records an image on a recording material. ing. The scanner unit 1 is provided above the printer unit 2 so as to be openable and closable with respect to the printer unit 2. Further, a discharge stacking space 3 for stacking the recording material discharged from the printer 2 is formed between the printer 2 and the scanner 1.

  The printer unit 2 has a cassette 9 in which the recording material P is stacked and accommodated in the lower part, and the cassette 9 is configured to be pulled out to the front of the apparatus. A toner image is formed by the developing cartridge 7 having the photosensitive drum 12 and the transfer roller 10 on the recording material P separated and fed one by one from the cassette 9 by the pickup roller 11. Then, the toner image on the recording material P is pressurized and heated by the fixing device 8 to form a fixed image. The recording material P on which the image is fixed is discharged and stacked on a discharge tray above the printer section 2 in the space section 3. The discharge tray is a stacking unit on which the recording material P discharged from the printer unit 2 is stacked in the space unit 3. The stacking unit includes a top cover 16 that constitutes the exterior of the printer unit 2 and a maintenance cover 14 as an opening / closing member that opens and closes for cartridge replacement and jam processing. The maintenance cover 14 can be opened and closed with respect to the printer unit main body 2.

  The scanner unit 1 functions as a flatbed scanner unit that reads an image of a document set on the document placement surface and pressed by the document presser 4. Further, the scanner unit 1 separates and conveys the originals set on the original stacking tray 6 one by one by an automatic original feeder (ADF) 5 and stacks the originals on the original discharge tray 27 on the upper surface of the original retainer 4. It also functions as a sheet-through scanner unit that reads the image.

  As shown in FIGS. 1 and 3, the scanner unit 1 is provided so as to be openable and closable by a predetermined angle with the printer unit 2 around the hinge unit 15. The hinge portion 15 is provided with a weight balance mechanism (not shown) that supports the opening / closing operation of the scanner portion 1.

  Further, the document presser 4 having the automatic document feeder 5 is also provided so as to be openable and closable by a predetermined angle with respect to the scanner unit 1 around the hinge unit 19. Similarly, the hinge portion 19 is provided with a weight balance mechanism that supports the opening / closing operation.

  2 and 4 show a state in which both the document presser 4 and the scanner unit 1 are closed with respect to the printer unit 2. A lock lever 20 serving as a locking member that locks the scanner unit 1 in the closed position (the position illustrated in FIGS. 2 and 4) is provided below the scanner unit 1. Further, at the lower part of the scanner unit 1, a lock release button 20 a is provided as a lock release unit that releases the lock by the lock lever 20. The lock release button 20 a protrudes from the lower surface of the scanner unit 1. The lock release button 20a contacts the maintenance cover 14 when the maintenance cover 14 is opened.

  Here, the lock release button 20a is provided integrally with the lock lever 20, but may be provided separately. A hook portion 32 is provided on the upper portion of the printer portion 2, and the lock lever 20 provided on the lower portion of the scanner portion 1 is hooked and locked on the hook portion 32.

  At this time, when the lock release button 20a is pressed, the locking of the scanner unit 1 by the lock lever 20 is released, and the scanner unit 1 is slightly opened by the pop-up spring 34 as a biasing member that biases the scanner unit 1 upward. It becomes a state. At this time, since the scanner unit 1 is balanced by the weight balance mechanism of the hinge unit 15, the user can lift and open the scanner unit 1 together with the document presser 4 to the open position shown in FIG. . Further, the scanner unit 1 opened to the open position can maintain this state by the weight balance mechanism.

  As shown in FIG. 1, the lock release button 20a is provided on a part of the lower edge of the scanner unit 1 that forms an opening to the space 3. More specifically, the lock release button 20a is arranged so that the length of the lower edge of the scanner unit 1 does not accidentally touch the lock release button 20a when the recording material P loaded in the space 3 is taken. It is provided at both ends in the direction. Accordingly, it is possible to prevent the opening / closing operation of the scanner unit 1 from malfunctioning due to the user touching the lock release button 20a by mistake, and a reliable operation can be obtained with a lock mechanism with a simple configuration. .

  Further, as shown in FIG. 5, the image forming apparatus is configured such that when the maintenance cover 14 is opened, the locking of the scanner unit 1 by the lock lever 20 is released. That is, when the maintenance cover 14 is opened for jamming and cartridge replacement, the maintenance cover 14 comes into contact with the lock release button 20a as shown in FIG. The stop is released. When this locking is released, the scanner unit 1 is slightly opened by the pop-up spring 34. For this reason, the user can lift and open the scanner unit 1 at the same time by one operation of opening the maintenance cover 14. Thereby, the time and work burden of the user when performing maintenance work can be reduced with a relatively simple configuration and low cost, and the operation can be performed smoothly without waste.

  As shown in FIG. 6, the opening 13 is formed in the upper part of the printer unit 2 by opening the maintenance cover 14. Maintenance such as replacement of the cartridge 7 and jam processing can be performed from the opening 13.

  In the above-described embodiment, the configuration in which the lock release button 20a is provided on a part of the lower surface of the scanner unit 1 that forms the opening to the space 3 (see FIG. 1) is illustrated. However, the arrangement and shape are not limited thereto. For example, as shown in FIG. 7, it may have a long shape so as to cover the entire area of the lower surface edge of the scanner unit 1 that forms an opening to the space 3. Even with such a configuration, the user can omit the previous operation of opening the scanner unit 1 when the maintenance cover 14 is opened, and the operability is improved.

[Other Embodiments]
Other embodiments of the image forming apparatus will be described.

  In the embodiment described above, the lock release button 20a is provided so as to protrude from the lower surface of the scanner unit 1. However, the present invention is not limited to this. For example, as shown in FIG. 8, the lock release button 20a may be provided so as to be hidden behind the lower surface of the scanner unit. As described above, the lock release button 20a can be prevented from malfunctioning by being placed inside the bottom surface of the exterior portion of the scanner unit 1 so as to be inserted into the lock release button 20a. Further, the lock release button 20a is configured to be recognized from the front of the apparatus main body. Thereby, when only the scanner unit 1 is opened, the locking by the lock lever 20 can be easily released by pressing the lock release button 20a.

  Further, a protrusion 14 d that abuts on the lock release button 20 a hidden behind the lower surface of the scanner unit 1 is provided on the maintenance cover 14 via the space 3. As a result, when the maintenance cover 14 is opened for jam processing, cartridge replacement, or the like, the protrusion 14d of the maintenance cover 14 pushes the lock release button 20a, so that the lock is released. When the lock is released, the scanner unit 1 is slightly opened by the pop-up spring 34. For this reason, the user can lift and open the scanner unit 1 at the same time by one operation of opening the maintenance cover 14.

  In the embodiment shown in FIG. 8, the same working efficiency as that of the first embodiment described above can be obtained. Furthermore, when the recording material P loaded in the space portion 3 is taken, the user's hand does not come into contact with the lock release button 20a, so that an erroneous opening / closing operation of the scanner portion 1 can be prevented more reliably. .

  Also in this embodiment, the lock release button 20a may be provided on a part of the lower surface of the scanner unit 1 as shown in FIG. 1, or the entire area of the lower surface edge of the scanner unit 1 as shown in FIG. May be provided.

  In the above-described embodiment, the case where the maintenance cover as the opening / closing member is the maintenance cover 14 that also serves as the recording material stacking portion in the space portion 3 is exemplified. However, the opening / closing member also serves as the loading portion. It does not have to be. For example, as shown in FIG. 9, an image forming apparatus having a maintenance cover 14 as an opening / closing member that can rotate toward the scanner unit 1 and a maintenance cover 21 that can be rotated on the opposite side. It may be a device.

  Even in such a configuration, when the maintenance covers 14 and 21 are opened for jam handling, cartridge replacement, and the like, the maintenance cover 14 pushes the lock release button 20a, so that the lock by the lock lever 20 is released. Is done. When the lock is released, the scanner unit 1 is slightly opened by the pop-up spring 34. For this reason, the user can simultaneously lift and open the scanner unit 1 by a single operation of opening the maintenance cover 14, and the same working efficiency as in the above-described embodiment can be obtained.

  Alternatively, as shown in FIG. 10, an image of a configuration having a maintenance cover 14 as an opening / closing member that is rotatable toward the scanner unit 1 in the space 3 and further having a maintenance cover 22 that is rotatable in front of the apparatus. It may be a forming device.

Even in such a configuration, when the maintenance cover 14 is opened for jamming and replacement of parts of the fixing device 8, the maintenance cover 14 pushes the lock release button 20 a , thereby locking by the lock lever 20. Is released. When the lock is released, the scanner unit 1 is slightly opened by the pop-up spring 34. For this reason, the user can simultaneously lift and open the scanner unit 1 by a single operation of opening the maintenance cover 14, and the same working efficiency as in the above-described embodiment can be obtained.

  Also in these embodiments, the unlock button 20a may be provided on a part of the lower surface of the scanner unit 1 as shown in FIG. 1, or at the lower edge of the scanner unit 1 as shown in FIG. You may provide in the whole area.

The perspective view which looked at the image forming device concerning a 1st embodiment from the front right side of a device (state which opened the scanner part, with a manuscript press closed) 1 is a perspective view of an image forming apparatus according to a first embodiment viewed from the front right side of the apparatus (a state in which a scanner unit is closed with a document retainer closed). Main longitudinal sectional view of the image forming apparatus shown in FIG. Main longitudinal sectional view of the image forming apparatus shown in FIG. 1 is a main longitudinal sectional view of an image forming apparatus according to a first embodiment (a state where a scanner unit is unlocked by a maintenance cover). 1 is a main longitudinal sectional view of an image forming apparatus according to a first embodiment (when a scanner unit and a maintenance cover are both opened). The perspective view of the image forming apparatus which shows the modification of the lock release button 20a Enlarged detail view of the vicinity of the lock lever and unlock button according to another embodiment Main longitudinal sectional view of an image forming apparatus according to another embodiment Main longitudinal sectional view of an image forming apparatus according to another embodiment A perspective view of a conventional image forming apparatus viewed from the front right side of the apparatus

Explanation of symbols

P ... Recording material 1 ... Scanner part 2 ... Printer part 3 ... Space part 7 ... Cartridge 14 ... Maintenance cover (opening / closing member)
14d ... Projection 20 ... Lock lever (locking member)
20a ... Unlock button (lock release part)
32 ... Hook 34 ... Pop-up spring

Claims (4)

A printer unit that records an image on a recording material; a scanner unit that is provided above the printer unit so as to be pivotable upward with respect to the printer unit; An image forming apparatus comprising: an opening / closing member capable of moving to open and close the inside of the printer unit; and an engaging member that engages the printer unit so as not to rotate the scanner unit upward.
An unlocking portion for releasing the locking by the locking member, and when the opening / closing member is opened , the opening / closing member abuts on the locking releasing portion, and the locking of the scanner unit by the locking member The image forming apparatus is characterized in that is released. The image forming apparatus according to claim 1 , wherein the unlocking portion protrudes from a lower surface of the scanner portion. The image forming apparatus according to claim 1 , wherein the opening / closing member includes a protrusion that abuts the locking release portion. The opening and closing member is in any one of claims 1 to 3, characterized in that the space for stacking discharged recording material is formed from said printer between said printer unit the scanner unit The image forming apparatus described.

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