JP2006256811A - Image forming device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image forming device structured so that operation noise generated in the device are unlikely to leak from gaps formed around a recording sheet supplying tray served as a recording sheet storage part while the workability of the sheet supplying operation is kept good. <P>SOLUTION: The recording sheet storage part inside a housing of the image forming device drawably installs the recording sheet supplying tray 28 loaded with recording sheets, in which a noise leak suppressing means to shut off noise without impairing the easiness of the tray being set and taken away is provided by forming a refracted gap having draftiness between an opening in the storage part and a grip 32 of the tray 28. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an image forming apparatus capable of reducing leakage of noise generated inside an image forming apparatus such as a copying machine, a printer, and a facsimile from a supply tray mounting portion of a recording sheet to the outside of the main body of the image forming apparatus.

  In recent years, there has been a demand for improvement in the office environment in order to support improvement in comfort or intellectual productivity in the office. In response to this movement, image forming apparatuses such as copiers and printers are strongly required to reduce noise.

  In general, an image forming apparatus pulls out sheets one by one from a paper tray housed in a housing and conveys the sheets to an image forming unit. After the image forming unit forms an image on the sheet, It is designed to discharge onto the tray.

  In such an image forming apparatus, a paper tray is attached to the opening formed on the front surface of the housing so that the paper tray can be pulled out or inserted, and a bundle of paper is replenished at a replenishment position where the paper tray is pulled out from the housing. The tray is pushed back into the housing and set at the receiving position to perform the paper supply operation.

  Also, in the image forming apparatus, when each paper tray is pulled out, play is provided around each paper tray so that the paper tray does not interfere with operability by contacting members around the opening formed on the front surface of the housing. Designed to leave a gap.

  For this reason, in the image forming apparatus, the operation sound inside the image forming apparatus, for example, the operation sound of the image forming unit and the operation sound of the sheet conveying unit member, leaks from the gap between the opening on the front surface of the housing and the paper tray. .

  Therefore, in the conventional image forming apparatus, in order to prevent noise generation, a plurality of paper trays are movably mounted in openings provided in the housing of the image forming apparatus, and each of these paper trays is supplied to a replenishment position outside the housing. The paper is replenished and the paper is replenished, and the cover means is disposed so as to close the drawer opening of at least two or more paper trays. When the paper tray is pulled out, it has been proposed to be integrated with the paper tray (see, for example, Patent Document 1).

  When configured in this manner, the cover means includes two or more sheets in order to block the gap between the two or more sheet trays with one cover means so that the operation sound of the image forming apparatus does not leak. When pulling out one of the trays, a complicated structure is required for selectively integrating the cover means with the drawn-out paper tray. Further, the cover means must be enlarged in order to cover the front surfaces of two or more paper trays.

For this reason, when taking out only one desired paper tray (paper feed tray) which is a recording sheet storage unit, the user performs an operation for integrating the paper cover to pull out the large cover means, Since the sheet tray provided with the cover means is pulled out to the replenishment position and the recording sheet (paper) is replenished, the workability of the replenishment operation of the recording sheet is deteriorated.
JP 2003-260849 A

  In view of the above, the present invention makes it difficult for operation noise in the image forming apparatus to leak from a gap formed around a recording sheet supply tray, which is a recording sheet storage unit, while maintaining good workability of the recording sheet supply operation. An object of the present invention is to newly provide an image forming apparatus capable of performing the above.

  The image forming apparatus according to claim 1, wherein a recording sheet supply tray on which a recording sheet is placed is detachably attached to a recording sheet storage portion inside the housing. By providing a refracted gap having air permeability between the handle portion of the recording sheet supply tray and providing a sound leakage suppressing means for sound insulation without impairing the detachability of the recording sheet supply tray. To do.

  The image forming apparatus according to claim 2 is an image forming apparatus in which a recording sheet supply tray on which a recording sheet is placed is detachably mounted in a recording sheet storage portion inside the housing. The recording sheet supply tray is mounted by forming a refracted gap having air permeability by disposing an overlap member at least at a predetermined distance between the upper end surface and the lower end surface of the handle portion of the recording sheet supply tray. The present invention is characterized in that sound leakage suppression means for insulating the sound without impairing the demountability is provided.

  According to a third aspect of the present invention, in the image forming apparatus according to the second aspect, the distance between the overlap member and the handle is configured to be 2 mm or more and 3 mm or less.

  With the configuration as described above, the sound leakage suppression effect can be obtained by the sound leakage suppression means configured between the recording sheet supply tray and the opening of the recording sheet storage unit. Further, the operability when the recording sheet supply tray is loaded and unloaded can be maintained by the gap between the recording sheet supply tray and the opening of the recording sheet storage unit. Therefore, it is possible to achieve both good maintenance of the detachability of the recording sheet supply tray and suppression of sound leakage from the image forming apparatus. Furthermore, since the sound leakage suppression means has a simple configuration, the image forming apparatus can be manufactured at low cost.

  According to a fourth aspect of the present invention, there is provided an image forming apparatus in which a recording sheet supply tray on which a recording sheet is placed is detachably mounted in a recording sheet storage portion inside the housing. In a predetermined portion near the outer peripheral portion on the inner surface, a loose insertion groove formed in a narrow groove shape and a vertical wall shape corresponding to the opening wall portion of the recording sheet storage portion can be inserted into the loose insertion groove, And an overlap member configured to be refracted twice or more to reduce noise by being inserted into the loose insertion groove.

  By configuring as described above, the overlap member is loosely inserted in the loose insertion groove provided between the recording sheet supply tray and the opening of the recording sheet storage portion, and the clearance in the loose insertion groove is set twice. With the above refracted configuration, the sound transmission loss by the overlap member and the shape of the gap created in the loose insertion groove by the overlap member are refracted twice or more, and noise is reduced by sound attenuation and interference. Can be reduced. In addition, since the overlap member is loosely inserted into the loose insertion groove, when the recording sheet supply tray is mounted / removed, no frictional resistance is generated in the portion of the sound leakage suppression means. The operability when loading and unloading the tray can be maintained satisfactorily. Therefore, with such a simple configuration, sound insulation can be performed without impairing the detachability of the recording sheet supply tray mounted on the image forming apparatus main body, and leakage of noise to the outside of the image forming apparatus main body can be reduced. . Further, since the structure of the loose insertion groove and the overlap member has a simple configuration, the image forming apparatus can be manufactured at low cost.

  The image forming apparatus according to claim 5 is an image forming apparatus in which a recording sheet supply tray on which a recording sheet is placed is detachably mounted in a recording sheet storage portion inside the housing. A rolling contact roller is attached to the shaft, and the rolling contact roller is in contact with a surface facing the handle portion through the gap, thereby closing the gap.

  With the configuration described above, the rolling roller is brought into rolling contact with the opposing wall surface via the gap, and the gap is blocked so as not to communicate with the outside linearly. As a result, noise can be reduced by sound transmission loss due to the rolling roller and sound attenuation and interference caused by a narrow and curved space formed around the rolling roller. Also, when loading / unloading the recording sheet supply tray, the rolling roller is in contact with the opposing wall surface through the gap so that there is little resistance, so it is necessary to load / unload the recording sheet supply tray. Therefore, the operability when loading and unloading the recording sheet supply tray can be maintained satisfactorily. Therefore, with such a simple configuration, sound insulation can be performed without impairing the detachability of the recording sheet supply tray mounted on the image forming apparatus main body, and leakage of noise to the outside of the image forming apparatus main body can be reduced. . Further, since the structure for mounting the rolling roller has a simple configuration, the image forming apparatus can be manufactured at low cost.

  In the image forming apparatus of the present invention, the workability of the recording sheet replenishing operation is kept good, and the operation sound in the image forming apparatus is hardly leaked from a gap formed around the recording sheet supply tray as a recording sheet storage unit. Therefore, there is an effect that it is possible to provide an image forming apparatus capable of reducing the cost.

  An image forming apparatus according to an embodiment of the present invention will be described with reference to FIGS. As shown in the perspective view of FIG. 1, the image forming apparatus (digital copying machine) main body 10 is configured by disposing an image scanner 14 above a printer 12 and an automatic document feeder 16 above the image scanner 14. .

  The image scanner 14 is provided with a platen glass (not shown) for placing a document on the upper surface thereof.

  Further, the automatic document feeder 16 is provided with a document feed tray 24 on which one or a plurality of documents to be copied are stacked. The automatic document feeder 16 automatically conveys the document placed on the document feed tray 24 so that it sequentially passes through the copy position on the platen glass and is discharged onto the document discharge tray 26. Configure to perform scanning operations. The automatic document feeder 16 is mounted so that it can be opened and closed with a hinge (not shown) so that the upper part of the platen glass can be opened.

  In addition, a paper discharge tray 20 is installed on the upper portion of the printer 12 between the image scanner 14 disposed above.

  The image scanner 14 is provided with a user interface for a user to input a start of copying and an exposure optical system (not shown) for reading a document image. An output signal of a document image read by the exposure optical system is converted into digital image data by a control unit (not shown) and temporarily stored, and is output as image data for forming a latent image at a predetermined timing. The data is output to a ROS (latent image forming apparatus) arranged inside.

  Inside the printer 12, required recording sheets (paper sheets) are pulled out one by one by a paper feeding device from a paper feeding tray 28 which is a recording sheet supply tray arranged in three stages below the apparatus main body (housing). The sheet is conveyed to the sheet discharge tray 20 through the transfer section and the fixing section.

  Although not shown, a photosensitive drum that is driven to rotate is mounted on the transfer unit disposed inside the printer 12. After the surface of the photosensitive drum is uniformly charged, it is exposed and scanned by the laser beam emitted from the ROS described above to form an electrostatic latent image.

  The electrostatic latent image thus formed on the photosensitive drum is developed into a toner image by a developing device (not shown).

  The toner image formed on the photosensitive drum is transferred to a recording sheet (recording paper) that has been transported on the transport path in a transfer unit (not shown).

  The recording sheet having the toner image transferred thereon is conveyed to a fixing unit (not shown) to fix the toner image, further conveyed on the conveyance path, discharged onto the paper discharge tray 20 and stocked. .

  In the image forming apparatus (digital copying machine) main body 10 configured as described above, the recording sheet supply trays are arranged in three stages as the recording sheet storage portions arranged in the lower part of the apparatus main body (housing). A sound leakage suppression unit is provided to make it difficult for operation noise in the image forming apparatus main body 10 to leak from the front side of the housing in the paper feed tray.

  As shown in FIG. 2, the paper feed tray 28 serving as a recording sheet supply tray is a box-shaped storage case portion for recording sheets (sheets) for storing a plurality of stacked recording sheets. 30 and a handle portion 32 integrally provided on the front side of the housing case portion 30.

  The paper feed tray 28 can be taken in and out like a drawer using a guide rail from a paper feed tray insertion opening formed on the front surface of the image forming apparatus main body 10 into a tray accommodating space inside the image forming apparatus main body 10. Attach to.

  The paper feed tray 28 mounted in this manner replenishes a bundle of recording sheets at the replenishment position pulled out from the housing, sets the paper feed tray 28 back to the accommodation position in the housing, and is used for paper feeding. The

  In the storage case portion 30 provided in the paper feed tray 28, a positioning front wall is erected on the front end of the paper feed tray in the paper carry-out direction, and the front end of the bundle of paper sheets as recording sheets is brought into contact with and positioned. A large number of recording sheets stacked in a bundle are stored in a state.

  As shown in FIG. 1, the handle portion 32 of the paper feed tray 28 also serves as a decorative plate disposed on the front surface of the image forming apparatus main body 10. The handle portion 32 is substantially rectangular in a front view and has a predetermined thickness. It is formed in a plate shape having the same width as the width of the image forming apparatus main body 10.

  The handle portion 32 arranged in three steps on the front surface of the image forming apparatus main body 10 is in contact with a member adjacent to the upper end side and the lower end side of the image forming apparatus main body 10 to perform the loading / unloading operation. In order not to impede the operability, a gap as play is left around the upper end side and the lower end side of each handle portion 32.

  A sound leakage suppression means is configured in a gap portion formed between the front side of the housing in the tray accommodating space of the image forming apparatus main body 10 and the handle portion 32 portion of the paper feed tray 28.

  For example, as shown in FIGS. 2 and 3, the sound leakage suppression unit stores a recording sheet that stores each of the sheet feeding trays 28 formed in the lower part of the image forming apparatus main body 10 and arranged in three stages. The overlap member 34 is disposed and configured so as to cover the entire circumference of the opening on the front side of the part.

  The overlap member 34 is formed in a vertical wall shape standing upright so as to continuously surround the entire circumference of the opening of the recording sheet storage portion on the front wall of the image forming apparatus main body 10. The overlap member 34 is provided at least on the portion corresponding to the upper end surface of the uppermost sheet feed tray handle portion 32 and the lower end surface of the lowermost sheet feed tray handle portion 32.

  The overlap member 34 is made of a plastic material having a thickness of 1 mm, for example, on the wall surface on the front surface side of the image forming apparatus main body 10 along the direction in which the paper feed tray 28 is pulled out. Stand up.

  Further, in the sound leakage suppression means shown in FIGS. 2 and 3, the front side of the opening of the recording sheet storage portion in the image forming apparatus main body 10 is substantially parallel to the inner surface of the handle portion 32 facing the housing. In addition, a soundproof wall 36 formed in a substantially long plate shape is disposed.

  The soundproof wall portion 36 is formed integrally with the one disposed around the opening of the recording sheet storage portion so as to be orthogonal to the base end portion of the overlap member 34. Also, the soundproof wall portion formed in a substantially long plate shape so as to be substantially parallel to the inner surface of the handle portion 32 facing the housing side, corresponding to the range covering the back side of the gap formed between the adjacent handle portions 32. 36A is arranged.

  2 and 3, the sound leaking from the gap between the upper and lower sides of the paper feed tray 28 can be blocked.

  2 and 3, the overlap member 34 is made of a plastic material having a thickness of 1 mm, and at least a gap formed between the overlap member 34 and the handle 32, As the gap formed between the soundproof walls 36 and 36A and the housing of the image forming apparatus main body 10 is reduced, the sound leakage reduction effect is increased.

  As a result of an experiment, the sound pressure level leaked out of the image forming apparatus main body 10 when the gap formed between the overlap member 34 and the overlap member 34 was 1 mm was 52.2 dB.

  The sound pressure level leaked out of the image forming apparatus main body 10 when the gap formed between the overlap member 34 was 6 mm was 54.2 dB.

  Further, in the image forming apparatus main body 10 from which the overlap member 34 and the soundproof wall portions 36 and 36A are removed, the sound pressure level leaked to the outside is about 56.4 dB.

  In the image forming apparatus main body 10, the sound leakage suppression effect can be improved as the gap formed between the overlap member 34 and the soundproof wall portions 36 and 36 </ b> A is narrowed. However, the narrower the gap generated between the overlap member 34 and the soundproof wall portions 36 and 36A, the narrower the gap (play) for improving the operability when the paper feed tray 28 is loaded and unloaded. Therefore, the operability during the loading / unloading operation tends to be deteriorated. Taking these circumstances into consideration, the gap (distance) between the overlap member 34 and the soundproof wall portions 36 and 36A. To decide.

  Therefore, Table 1 below shows the results of experiments on operability and leakage noise that were performed to determine the distance (distance) between the gaps generated with the overlap member 34.

この表１の結果から分かるように、オーバーラップ部材３４との間に生じる隙間の間隔（距離）を、２ｍｍ以上、３ｍｍ以下（より好ましくは２ｍｍ）に設定したときに、操作性を良好に保ったまま、漏れ音を抑制できることが分かった。

As can be seen from the results in Table 1, the operability is kept good when the gap (distance) between the overlap member 34 is set to 2 mm or more and 3 mm or less (more preferably 2 mm). It was found that the leakage sound can be suppressed.

  In addition, it is desirable that the material constituting the overlap member 34 and the soundproof wall portions 36 and 36A is an elastic member such as a resin material or rubber in order to maintain the detachability of the paper feed tray 28. Further, when the paper feed tray 28 is stored, a gap is not opened between the handle portion 32 and the overlap member 34, but the end portion of the storage case portion 30 of the paper feed tray 28 is the soundproof wall portion 36. Therefore, it is desirable that the soundproof wall portions 36 and 36A can be elastically deformed by using an elastic member so that they can be stored without impairing the operability of the loading / unloading operation.

  Next, another configuration example of the sound leakage suppression unit provided in the image forming apparatus main body 10 will be described with reference to FIGS.

  The sound leakage suppression means shown in FIG. 4 to FIG. 6 is configured to reduce noise by refracting the gap formed between the overlap member 34 at least twice.

  In the sound leakage suppression means shown in FIGS. 4 to 6, a loose insertion groove 38 formed in a narrow groove shape is formed in a portion surrounding each outer peripheral portion of the inner surface of each handle portion 32 to suppress sound leakage. . At the same time, an overlap member 34 that can be inserted into the loose insertion groove 38 is provided on the front wall portion of the opening portion of the storage space in the recording sheet storage portion of the image forming apparatus main body 10 where the paper feed trays 28 are loaded and unloaded. Project.

  The overlap member 34 used in the sound leakage suppression means shown in FIGS. 4 to 6 can be configured using foamed urethane, rubber, resin material, plastic sheet, or the like.

  The overlap member 34 is formed at such a height that the free end of the overlap member 34 does not contact the groove bottom of the loose insertion groove 38 when the overlap member 34 is loosely inserted into the loose insertion groove 38. It is possible not to impair the detachability.

  With this configuration, a gap that is refracted (bent) into a substantially U shape is created in a state where the overlap member 34 is loosely inserted into the loose insertion groove 38.

  A gap that is refracted (bent) into a substantially U shape created by loosely inserting the overlap member 34 into the loose insertion groove 38 surrounds the outer peripheral portion of the inner side surface of the handle portion 32 of each paper feed tray 28. Are arranged as follows. Therefore, the storage space for loading and unloading each paper feed tray 28 in the recording sheet storage portion of the image forming apparatus main body 10 communicates with the outside air only through the gap that is refracted (bent) into a substantially U shape. Become. For this reason, noise generated in the image forming apparatus main body 10 also leaks to the outside through the gap that is refracted (bent) into a substantially U shape.

  In the sound leakage suppression means shown in FIGS. 4 to 6, the overlap member 34 is loosely inserted into the loose insertion groove 38 to form a substantially U-shaped gap that is refracted twice or more. The sound transmission loss due to the member 34 and the shape of the gap formed in the loose insertion groove 38 by the overlap member 34 are refracted, and noise can be reduced by sound attenuation and interference.

  In addition, since the overlap member 34 is loosely inserted into the loose insertion groove 38, no frictional resistance is generated in the portion of the sound leakage suppression means when the paper feed tray 28 is mounted / removed. The operability at the time of loading / unloading the paper tray 28 can be maintained satisfactorily. Therefore, with such a simple configuration, sound insulation is performed without impairing the detachability of the paper feed tray 28 attached to the image forming apparatus main body 10, and noise leakage to the outside of the image forming apparatus main body 10 is reduced. Can do.

  Further, the sound leakage suppression means shown in FIGS. 2 to 6 provided in the image forming apparatus main body 10 has air permeability that enables exchange between the paper tray storage space of the image forming apparatus main body 10 and the outside air. Therefore, the inside of the image forming apparatus main body 10 is ventilated and cooled, or the recording sheet dust generated inside the paper feed tray 28 is exhausted and discharged to the outside of the image forming apparatus main body 10. It can be prevented.

  Next, still another configuration example of the sound leakage suppression unit provided in the image forming apparatus main body 10 will be described with reference to FIGS.

  In the sound leakage suppression means shown in FIGS. 7 to 9, a gap formed between the handle portion 32 of the paper feed tray 28 and the wall of the recording sheet storage portion, or one handle portion 32 and the other handle portion 32. The gap formed between the two is configured so as to be sound-insulated using the rolling roller 40.

  In the sound leakage suppression means shown in FIGS. 7 to 9, the rolling contact roller 40 is mounted on the upper surface portion of the handle portion 32 in the paper feed tray 28 along the longitudinal direction. For this reason, a U-shaped groove 46 is formed in the upper surface portion of the handle portion 32, and the rolling roller 40 is disposed therein. In addition, the rolling roller 40 is configured to support the rotating shaft 42 projected at both ends by a bearing member 44 formed in a square plate shape.

  In this sound leakage suppression means, U-shaped guide members 48 are respectively installed at both ends of the U-shaped groove 46, and parallel to the U-shaped guide grooves 48 </ b> A formed in each guide member 48. The corresponding bearing members 44 are slidably mounted between the opposing guide sides.

  Furthermore, in this sound leakage suppression means, the rolling contact roller 40 mounted in the groove 46 of the handle portion 32 is suspended by suspending the compression coil spring 50 between the bottom portion of the guide groove 48A and the bearing member 44. , And is configured to protrude from the groove 46 in a state of being elastically supported by a predetermined height.

  7 to 9 configured as described above, the rolling roller 40 rolls on the wall surface of the recording sheet storage portion of the image forming apparatus body 10 or rolls on the bottom surface of the handle portion 32. The gap formed between them is blocked so as not to communicate with the outside in a straight line.

  In other words, the rolling contact roller 40 is disposed in a gap portion formed between the handle portion 32 of the paper feed tray 28 and the wall of the recording sheet storage portion, whereby the outer peripheral surface of the rolling contact roller 40 and the groove 46 are arranged. A space having a narrow width and a curved shape is formed between the two.

  Therefore, the inside of the image forming apparatus main body 10 and the outside air communicate with each other through a narrow and curved space in a gap formed between the handle portion 32 of the paper feed tray 28 and the wall of the recording sheet storage portion. It will be.

  For this reason, in the sound leakage suppression means shown in FIGS. 7 to 9, due to sound transmission loss by the rolling roller 40 and sound attenuation and interference by a narrow and curved space formed around the rolling roller 40, Noise can be reduced.

  In addition, when the paper feed tray 28 is loaded and unloaded, the rolling roller 40 rolls in contact with the bottom surface of the handle portion 32 of the paper feed tray 28 or the wall surface of the recording sheet storage portion so that there is little resistance. Since the operation force required for loading / unloading the sheet feeding tray 28 does not increase, the operability when loading / unloading the sheet feeding tray 28 can be maintained well. Therefore, with such a simple configuration, sound insulation is performed without impairing the detachability of the paper feed tray 28 attached to the image forming apparatus main body 10, and noise leakage to the outside of the image forming apparatus main body 10 is reduced. Can do.

  Further, the sound leakage suppression means shown in FIGS. 7 to 9 provided in the image forming apparatus main body 10 has a curved space formed around the rolling roller 40 and the paper tray storage space of the image forming apparatus main body 10 and the outside air. Therefore, the inside of the image forming apparatus main body 10 is ventilated and cooled, or the recording sheet dust generated inside the paper feed tray 28 is placed on the aeration. The operation of discharging the image forming apparatus main body 10 to the outside can be prevented from being hindered.

  It should be noted that the present invention is not limited to the above-described embodiment, and it is needless to say that various other configurations can be taken without departing from the gist of the present invention.

1 is an overall perspective view showing an image forming apparatus according to an embodiment of the present invention. FIG. 3 is an explanatory view showing a sheet feeding tray provided with a sound leakage suppression unit and a storage portion thereof, which are arranged in the printer in the image forming apparatus according to the embodiment of the present invention. FIG. 4 is an enlarged explanatory view showing a main part of a paper feed tray provided with a sound leakage suppression unit and its storage portion, which is arranged in a printer in the image forming apparatus according to the embodiment of the present invention. FIG. 3 is an enlarged explanatory view of a main part showing a main part of a paper feed tray provided with a sound leakage suppression unit of another configuration and a storage part thereof arranged in the printer in the image forming apparatus according to the embodiment of the present invention in a longitudinal section. is there. FIG. 3 is an enlarged explanatory view of a main part showing in cross section a main part of a paper feed tray provided with a sound leakage suppression unit of another configuration and a storage part thereof arranged in a printer in the image forming apparatus according to the embodiment of the present invention. is there. FIG. 5 is a perspective view of a main part extracted from a main part of a paper feed tray provided with a sound leakage suppression unit of another configuration and a storage part thereof arranged in a printer in the image forming apparatus according to the embodiment of the present invention. It is explanatory drawing which shows the principal part of the paper supply tray which provided the leak-leakage suppression means of the other structure arrange | positioned in the printer in the image forming apparatus concerning embodiment of this invention, and its storage part. FIG. 10 is an enlarged explanatory diagram of the main part of a paper feed tray provided with a sound leakage suppression unit of still another configuration and a storage portion thereof, which is arranged in a printer in the image forming apparatus according to the embodiment of the present invention. FIG. 10 is a schematic perspective view showing a part of a paper feed tray provided with a sound leakage suppression unit having another configuration arranged in a printer in the image forming apparatus according to the embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Image forming apparatus main body 12 Printer 28 Paper feed tray 30 Storage case part 32 Handle part 34 Overlap member 36 Soundproof wall part 36A Soundproof wall part 38 Free insertion groove 40 Rolling contact roller

Claims (5)

In an image forming apparatus in which a recording sheet supply tray on which a recording sheet is placed is detachably mounted in a recording sheet storage portion inside the housing.
By creating a refracted gap having air permeability between the opening of the recording sheet storage portion and the handle portion of the recording sheet supply tray, sound insulation is performed without impairing the detachability of the recording sheet supply tray. An image forming apparatus comprising a sound leakage suppression unit. In an image forming apparatus in which a recording sheet supply tray on which a recording sheet is placed is detachably mounted in a recording sheet storage portion inside the housing.
At the opening of the recording sheet storage unit, an overlapping member is disposed at least at an upper end surface and a lower end surface of the handle portion of the recording sheet supply tray so as to be adjacent to each other by a predetermined distance so that a refracted gap having air permeability is provided. An image forming apparatus, comprising: a sound leakage suppressing unit that makes a sound insulation without impairing the attachment / detachment property of the recording sheet supply tray. The image forming apparatus according to claim 2, wherein a distance between the overlap member and the handle is configured to be 2 mm or more and 3 mm or less. In an image forming apparatus in which a recording sheet supply tray on which a recording sheet is placed is detachably mounted in a recording sheet storage portion inside the housing.
A loose insertion groove formed in a narrow groove shape in a predetermined portion near the outer peripheral portion of the inner surface of the handle portion of the recording sheet supply tray;
A vertical wall is erected on the opening wall portion of the recording sheet storage portion so as to be insertable into the loose insertion groove, and is inserted into the loose insertion groove so that a gap in the loose insertion groove is formed twice. An overlap member configured to be refracted to reduce noise,
An image forming apparatus comprising: In an image forming apparatus in which a recording sheet supply tray on which a recording sheet is placed is detachably mounted in a recording sheet storage portion inside the housing.
A rolling roller is pivotally attached to a handle portion of the recording sheet supply tray, and the rolling roller is configured to block the gap by rolling contact with a surface facing the handle portion via the gap. Image forming apparatus.

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