JP7225453B2 - Sheet storage device and image forming device - Google Patents

Description

The present invention relates to a sheet storage device provided in an image forming apparatus such as a copying machine, a printer, a facsimile machine, and a combination of these machines.

2. Description of the Related Art Conventionally, in an image forming apparatus such as a copying machine, a printer, a facsimile machine, and a combination of these machines, which forms an image on a sheet, a sheet storage device is provided for storing sheets to be supplied to an image forming section. The sheet storage device is provided with a sheet storage portion for storing sheets. In the sheet storage device, it is necessary to open and close the sheet storage portion when replenishing the sheets. A fall prevention mechanism is provided to prevent the sheet storage portion from falling out of the sheet storage device when the sheet storage portion is opened. It is necessary to detach the sheet storage unit from the sheet storage device when performing sheet jam processing, roller replacement, or the like. A detachable mechanism is provided so that the sheet storage portion can be detached from the sheet storage device.

As a device having such a fall-off prevention mechanism and an attachment/detachment mechanism, Patent Document 1 discloses a fall-off prevention mechanism that prevents the sheet storage portion from falling off from the sheet storage device when the sheet storage portion is opened, and a sheet storage device. and an attachment/detachment mechanism for attaching/detaching the seat storage portion from.

JP 2012-126575 A

However, in a sheet storage device having such a fall-off prevention mechanism and an attachment/detachment mechanism, when a sheet storage portion capable of stacking a large amount of sheets is provided, the sheet storage portion rolls on the guide rail portion in order to facilitate opening and closing of the sheet storage portion. A bearing or the like is used. As a result, resistance when opening and closing the sheet storage portion is reduced, and excessive load is applied to the drop prevention mechanism when the sheet storage portion is opened with a large amount of sheets loaded. As a result, there is a problem that a loud collision noise is generated, and the sheet storage portion unintentionally comes off due to breakage or the like.

SUMMARY OF THE INVENTION An object of the present invention is to provide a sheet storage device that does not generate a loud collision noise or damage when the sheet storage portion is opened.

A typical configuration of the sheet storage device according to the present invention for achieving the above object is a sheet storage device in which a sheet storage portion for storing sheets is provided detachably from a body portion of the sheet storage device, wherein: In order to detachably support the sheet storage section with respect to the main body section, the storage section includes a rail member having a shape extending in a direction parallel to a direction in which the seat storage section is removed from the main body section, and the rail member. a slide member movable with respect to the rail member along a path; a first biasing member biasing the slide member in the removal direction; and a slide member movable in a direction intersecting the removal direction A stopper member and a second biasing member biasing the stopper member to protrude from the slide member are provided, and the main body protrudes from the slide member by the second biasing member. An engaging member engageable with a stopper member is provided, and an impact received by the slide member when the stopper member engages with the engaging member is compressed by the first biasing member to attenuate, The sheet storage portion is prevented from falling off from the main body portion by engaging the stopper member with the engaging member, and in a state in which the stopper member protrudes from the slide member by the second biasing member, By compressing the second biasing member via the stopper member, the stopper member is retracted from a position where it can be engaged with the engaging member, and can be removed from the main body. Characterized by

According to the present invention, when the sheet storage section is opened, a loud collision noise, damage, or the like does not occur.

1 is a cross-sectional explanatory view showing a configuration of an image forming apparatus provided with a sheet storage device according to the present invention; FIG. 1 is a perspective explanatory view showing a configuration of an image forming apparatus having a sheet storage device according to the present invention; FIG. FIG. 4 is a perspective explanatory view showing a state in which a sheet storage portion is pulled out from the sheet storage device; 1 is a perspective explanatory view showing the configuration of a sheet storage device according to the present invention; FIG. FIG. 4 is a perspective explanatory view showing a configuration when the sheet storage portion is attached to the sheet storage device; FIG. 11 is a perspective explanatory view showing a configuration when the sheet storage portion is pulled out from the sheet storage device within a range in which the drop-off prevention portion and the stopper do not come into contact with each other; FIG. 11 is a perspective explanatory view showing a configuration when the sheet storage portion is pulled out from the sheet storage device to a point where the drop-off preventing portion and the stopper come into contact; FIG. 10 is a perspective explanatory view showing the configuration of the sheet storage device and the sheet storage portion in a state where the stopper is pushed down; (a) is a cross-sectional explanatory view showing a state of a detachment prevention portion when the sheet storage portion is stored in the sheet storage device according to the present invention. FIG. 10B is a cross-sectional explanatory view showing a state of the detachment prevention portion when the sheet storage portion is pulled out from the sheet storage device in a range in which the detachment prevention portion and the stopper do not come into contact with each other; FIG. 7A is a cross-sectional explanatory view showing a state of the detachment prevention part when the sheet storage part is pulled out from the sheet storage device to a point where the detachment prevention part abuts against the stopper; (b) is a cross-sectional explanatory view showing the state of the detachment prevention part when the stopper is pushed down before the detachment prevention part and the stopper come into contact with each other.

An embodiment of an image forming apparatus having a sheet storage device according to the present invention will be specifically described with reference to the drawings.

<Image forming apparatus>
A configuration of an image forming apparatus 6 having a sheet storage device 102 according to the present invention will be described with reference to FIG. FIG. 1 is a cross-sectional explanatory view showing the configuration of an image forming apparatus 6 having a sheet storage device 102 according to the present invention. The image forming apparatus 6 shown in FIG. 1 has, for example, a photosensitive drum 1 as an image bearing member made of an organic photosensitive member. Further, it has a charging roller 2 serving as charging means for uniformly charging the surface of the photosensitive drum 1 rotating counterclockwise in FIG. Furthermore, it has a laser scanner 9 serving as an image exposure means.

The laser scanner 9 emits a laser beam to expose the surface of the photosensitive drum 1 uniformly charged by the charging roller 2 based on image information. An electrostatic latent image is thereby formed on the surface of the photosensitive drum 1 . Toner is supplied to the electrostatic latent image formed on the surface of the photosensitive drum 1 by a developing sleeve 8 as a developer carrier provided in a developing device 3 as developing means to develop a toner image. Reference numeral 19 shown in FIG. 1 denotes an agitating member for agitating the toner in the developing device 3.

On the other hand, the sheet S such as paper stored in the sheet feeding tray 103 serving as the sheet storage portion shown in FIGS. It is fed to the nip portion N at a predetermined timing. A toner image formed on the surface of the photosensitive drum 1 is transferred to the sheet S at the transfer nip portion N by applying a transfer bias to the transfer roller 4 .

The sheet S onto which the toner image has been transferred is conveyed to a fixing device 5 serving as fixing means, and is heated and pressurized in the process of being nipped and conveyed by a fixing roller and a pressure roller provided in the fixing device 5 . The toner is thermally melted and fixed to the sheet S by heat. After that, it is nipped and conveyed by discharge rollers (not shown) and discharged onto the discharge tray 20 . Residual toner remaining on the surface of the photosensitive drum 1 without being transferred onto the sheet S is scraped off by a cleaning blade 7 serving as cleaning means and collected in a collection container 18 .

<Sheet storage device>
Next, the configuration of the sheet storage device 102 according to the present invention will be described with reference to FIGS. 2 to 10. FIG. FIG. 2 is a perspective explanatory view showing the configuration of the image forming apparatus 6 having the sheet storage device 102 according to the present invention. FIG. 3 is a perspective explanatory view showing a state in which the feed tray 103 (sheet storage portion) is pulled out from the sheet storage device 102. As shown in FIG. FIG. 4 is a perspective explanatory view showing the configuration of the sheet storage device 102 according to the present invention.

FIG. 5 is a perspective explanatory view showing the configuration when the sheet storage device 102 is mounted with the feed tray 103 (sheet storage portion). FIG. 6 is a perspective explanatory view showing a configuration when the sheet feeding tray 103 (sheet storage portion) is pulled out from the sheet storage device 102 to the extent that the stopper 53 does not come into contact with the stopper portion 16a (engagement member). . FIG. 7 is a perspective explanatory view showing the structure when the feed tray 103 (sheet storage portion) is pulled out from the sheet storage device 102 to the point where the stopper 53 abuts against the stopper 16a (engagement member).

FIG. 8 is a perspective explanatory view showing the configuration of the sheet storage device 102 and the sheet feeding tray 103 (sheet storage portion) with the stopper 53 pushed down. FIG. 9(a) is a cross-sectional explanatory view showing the state of the detachment prevention/removal portion 15 when the sheet storage device 102 according to the present invention stores the feed tray 103 (sheet storage portion). FIG. 9B shows the detachment prevention portion 15 when the feeding tray 103 (sheet storage portion) is pulled out from the sheet storage device 102 in a range in which the anti-dropout portion 16a (engagement member) and the stopper 53 do not come into contact with each other. It is a cross-sectional explanatory view showing the state of.

FIG. 10A shows the detachable/removable portion 15 when the feeding tray 103 (sheet storage portion) is pulled out from the sheet storage device 102 to the point where the stopper 53 abuts against the detachment prevention portion 16a (engagement member). It is cross-sectional explanatory drawing which shows a state. FIG. 10(b) is a cross-sectional explanatory view showing the state of the detachment prevention portion 15 when the stopper 53 is pushed down before the detachment prevention portion 16a (engagement member) and the stopper 53 come into contact with each other.

As shown in FIGS. 2 and 3, the sheet storage device 102 provided in the lower portion of the image forming apparatus 6 includes a sheet storage device 102 body including a feed tray 103 serving as a sheet storage portion for storing sheets S such as paper. It is provided detachably with respect to. As shown in FIGS. 3 and 5 to 8, a pair of fixed guide rails 16 are provided on left and right inner wall surfaces of the main body of the sheet storage device 102 . On the other hand, a pair of movable guide rails 14 are provided on the left and right outer wall surfaces of the feed tray 103 .

The movable guide rail 14 is provided on the side of the feed tray 103 (on the side of the sheet storage portion) and configured as a rail member that supports the feed tray 103 movably with respect to the main body of the sheet storage device 102 . The movable guide rail 14 is movably supported along the fixed guide rail 16 . As a result, the feeding tray 103 can be pulled out or inserted into the sheet storage device 102 by moving in the direction of the arrow A in FIG.

A feed tray 103 is attached to the sheet storage device 102 . The sheets S stored in the sheet feeding tray 103 in this state are separated and fed one by one by the sheet feeding device 41 provided on the main body side of the sheet storing device 102 . The feeding device 41 is configured as feeding means including feeding rollers, separation means, and the like (not shown).

The sheet S is separated and fed one by one by the feeding device 41 . Thereafter, the sheet is conveyed to the image forming section 101 by conveying means such as a conveying roller (not shown). Then, an image is formed on the sheet S as described above. After that, it is discharged onto the discharge tray 20 by the discharge section 42 provided with discharge rollers (not shown). The image forming unit 101 forms an image on the sheet S fed from the sheet storage device 102 .

<Seat storage part>
As shown in FIG. 3, the feed tray 103 serving as a sheet storage portion includes a front side regulating plate 21, a rear side regulating plate 22, a left side regulating plate 23, a right side regulating plate 24, and a bottom plate 25. is provided. A large amount of sheets S stacked on the bottom plate 25 are in contact with the front side regulating plate 21, the rear side regulating plate 22, the left side regulating plate 23, and the right side regulating plate 24 on each of the four sides. Storage position is restricted.

On the outer wall surfaces on both the left and right sides of the sheet feeding tray 103, opening and closing directions indicated by arrow A in FIG. A pair of movable guide rails 14 are provided for guiding to. The movable guide rail 14 is provided with a detachable/removable portion 15 shown in FIGS. 9 and 10 . The drop-off preventing attachment/detachment portion 15 has a drop-off preventing function to prevent the feed tray 103 from dropping off from the main body of the sheet storage device 102 . Further, it has an attachment/detachment function for attaching/detaching the sheet feeding tray 103 to/from the main body of the sheet storage device 102 .

On the other hand, a pair of fixed guide rails 16 are provided on inner wall surfaces on both left and right sides of the main body of the sheet storage device 102 . The fixed guide rail 16 supports the movable guide rail 14 so as to be movable along the fixed guide rail 16 and guides the feed tray 103 in the opening/closing direction indicated by arrow A in FIG.

At the front end of the fixed guide rail 16, a fall prevention portion 16a is provided to prevent the sheet feed tray 103 from falling off by coming into contact with the fall prevention detachable portion 15 provided on the movable guide rail 14. As shown in FIG. The fall prevention portion 16a is provided at the front end portion of the fixed guide rail 16 provided on the sheet storage device 102 side (sheet storage device side). The drop-off preventing portion 16a is configured as an engaging member that engages with a contact surface 53a1 of a projection portion 53a provided on the upper portion of a stopper 53 (stopper member) shown in FIGS.

<Sheet storage device>
For convenience of explanation, FIG. 4 shows only the sheet storage device 102, omitting the image forming unit 101 on the upper side and the caster portion provided with the wheels 11 on the lower side. As shown in FIG. 4 , the sheet storage device 102 includes an upper plate 31 , a rear plate 32 , a left plate 33 , a right plate 34 and a bottom plate 35 . The feed tray 103 is inserted through an opening 102a provided in the front surface of the sheet storage device 102 and stored inside the main body of the sheet storage device 102 . A handle portion 26 is provided on the surface side of the front side regulating plate 21 of the feed tray 103 . A user can grasp the handle portion 26 and move the feed tray 103 in the direction of arrow A in FIG. 3 to pull it out or insert it to open and close it.

5 to 8 are diagrams showing the process of pulling out the feeding tray 103 in the direction of arrow A1 in FIGS. FIG. 5 shows a state in which the feed tray 103 is stored inside the main body of the sheet storage device 102 . FIG. 9(a) shows the state of the detachment prevention/removal portion 15 when the feeding tray 103 is stored in the main body of the sheet storage device 102. FIG.

<Drop prevention detachable part>
As shown in FIGS. 9 and 10, the detachable/removable portion 15 can be moved along the movable guide rail 14 (rail member) within an arbitrary range in the same direction as the opening/closing direction of the feeding tray 103 indicated by the arrow A in FIG. It has a slider 51 (slide member) that is movably supported by. Furthermore, one end is locked to the locking portion 14b of the movable guide rail 14, and the other end is locked to the side surface 51a2 of one end in the moving direction of the slider 51 (horizontal direction in FIGS. 9 and 10). It has a slider spring 52 made of a spring. The slider spring 52 is configured as a first biasing member that biases the slider 51 (slide member) along the movable guide rail 14 (rail member).

Further, the detachable/removable portion 15 is movable inside the slider 51 in the vertical direction (vertical direction in FIGS. 9 and 10) with respect to the opening/closing direction of the feed tray 103 (horizontal direction in FIGS. 9 and 10). Supported. As shown in FIG. 10(b), the detachment prevention part 15 has a stopper 53 provided so as to be retractable inside the slider 51. As shown in FIG. The stopper 53 is provided on the slider 51 (slide member), and is a stopper member that can move in a direction (vertical direction in FIGS. 9 and 10) perpendicular to the moving direction of the slider 51 (horizontal direction in FIGS. 9 and 10). configured as

As shown in FIGS. 9 and 10, the drop-off prevention detachable portion 15 is composed of a compression spring having one end engaged with the bottom surface 51b of the slider 51 and the other end engaged with the bottom surface 53b of the stopper 53. and a stopper spring 54 . The stopper spring 54 is configured as a second biasing member that biases the stopper 53 (stopper member) so as to protrude from the slider 51 (slide member). The stopper spring 54 biases the contact surface 53a1 of the protrusion 53a provided on the top of the stopper 53 upward in FIGS.

<Slide member>
As shown in FIGS. 9 and 10, the slider 51, which serves as a slide member, has a bottom surface 51b and side surfaces 51a1 and 51a2 that stand up from both ends of the bottom surface 51b, and has a U-shaped cross section. be done. The slider 51 is provided so as to be movable in the horizontal direction in FIGS. An opening 51 c is provided in the upper portion of the slider 51 . The bottom surface 51b of the slider 51 is provided with an opening 51b1.

<Stopper member>
As shown in FIGS. 9 and 10, a stopper 53, which is a stopper member, is accommodated inside a slider 51 having a U-shaped cross section, and extends along side surfaces 51a1 and 51a2 of the slider 51 in the vertical direction in FIGS. is provided so as to be able to move to As shown in FIG. 9(a), when the stopper 53 is urged upward in FIG. 9(a) by the biasing force of the stopper spring 54, the The flanges 53c and 53d are brought into contact with the upper guide portion 14c to restrict the upper limit position. The protrusion 53a provided with the contact surface 53a1 of the stopper 53 is accommodated in an opening 14c1 provided in the middle of the upper guide portion 14c.

A storage restricting portion 55 is provided that protrudes downward from the bottom surface 53 b of the stopper 53 . As shown in FIG. 10B, the stopper 53 moves downward in FIG. 10B against the biasing force of the stopper spring . In this state, the storage restricting portion 55 passes through the opening 51b1 provided in the bottom surface 51b of the slider 51 and is accommodated in the opening 14d1 provided in the middle of the lower guide portion 14d.

As shown in FIG. 5, when the feeding tray 103 is accommodated in the main body of the sheet storage device 102, the detachment prevention/removal portion 15 does not receive a load from anywhere as shown in FIG. 9(a). Therefore, the slider spring 52 and the stopper spring 54 are not compressed, and the slider 51 and the stopper 53 are at the standby position shown in FIG. 9(a). A stopper 53 (stopper member) shown in FIGS. 9A, 9B, and 10A is biased by a stopper spring 54 (second biasing member) to protrude from the slider 51 (slide member). indicate position.

FIGS. 6 and 9B show the sheet feeding tray 10 in a range in which the drop-off preventing portion 16a provided on the fixed guide rail 16 and the contact surface 53a1 provided on the stopper 53 of the drop-off preventing/removing portion 15 do not come into contact with each other. 103 is pulled out from the main body of the sheet storage device 102 to open. As shown in FIG. 9(b), the sheet feeding tray 10 is held within a range in which the drop-off preventing portion 16a provided on the fixed guide rail 16 and the contact surface 53a1 provided on the stopper 53 of the drop-off preventing/removing portion 15 do not come into contact with each other. 103 is pulled out from the main body of the sheet storage device 102 to open.

In this state, as shown in FIGS. 5 and 9A, the detachment prevention section 15 can receive a load from anywhere in the same manner as the state in which the sheet feeding tray 103 is stored and closed in the main body of the sheet storage device 102. never receive As a result, the slider spring 52 and the stopper spring 54 are not compressed, and the slider 51 and the stopper 53 are in the standby position as in FIG. 9(a). 9A and 9B show that the contact surface 53a1 of the protrusion 53a provided on the top of the stopper 53 (stopper member) is provided at the tip of the fixed guide rail 16 provided on the main body of the sheet storage device 102. 2 shows the standby position before engaging with the disengagement prevention portion 16a (engagement member) provided.

7 and 10(a), the sheet feeding tray 10 is moved up to the point where the drop-off preventing portion 16a provided on the fixed guide rail 16 and the contact surface 53a1 provided on the stopper 53 of the drop-off preventing/removing portion 15 come into contact with each other. 103 is pulled out from the main body of the sheet storage device 102 to open. As shown in FIGS. 7 and 10(a), until the drop-off prevention portion 16a provided on the fixed guide rail 16 and the contact surface 53a1 provided on the stopper 53 of the drop-off prevention detachable portion 15 abut against each other, The feed tray 103 is pulled out from the main body of the sheet storage device 102 and opened. In this state, the abutment surface 53a1 provided on the stopper 53 of the detachment prevention detachable portion 15 receives a load from the detachment prevention portion 16a provided on the fixed guide rail 16 in the right direction in FIG.

The stopper 53 is provided movably in the vertical direction in FIG. 10A within the slider 51 . The stopper 53 is provided so as to be movable in the left-right direction in FIG. The slider 51 moves in the direction (to the right in FIG. 10A) in which the slider spring 52, which is a compression spring, is compressed by the load received from the fall prevention portion 16a. By compressing the slider spring 52, the stopper 53 attenuates the impact received from the drop prevention portion 16a provided on the fixed guide rail 16, and the slider 51 and the stopper 53 assume the impact attenuation position shown in FIG. 10(a). .

As shown in FIG. 10A, the stopper 16a (engagement member) engages with the contact surface 53a1 of the projection 53a provided on the upper portion of the stopper 53 (stopper member). A slider spring 52 (first urging member) attenuates the impact of the load received by the slider 51 (slide member) from the drop-off prevention portion 16a (engagement member) through the stopper 53 (stopper member). FIG. 10(a) is the impact attenuation position. The drop-off preventing portion 16a (engagement member) is provided at the tip portion of the fixed guide rail 16 provided in the main body of the sheet storage device 102. As shown in FIG.

Consider the case where the slider 51 and the stopper 53 are in the impact attenuation position as shown in FIG. 10(a). At this time, the retraction restricting portion 55 protruding from the lower portion of the stopper 53 passes through the opening 51b1 provided in the bottom surface 51b of the slider 51 and comes into contact with the lower guide portion 14d provided on the movable guide rail 14. position. As a result, the stopper 53 cannot be stored inside the slider 51 .

As shown in FIGS. 7 and 10(a), the stopper 16a provided on the fixed guide rail 16 and the contact surface 53a1 provided on the stopper 53 of the attachment/detachment portion 15 are in contact with each other. The feed tray 103 is pulled out from the main body of the sheet storage device 102 and opened.

At this time, as shown in FIG. 10( a ), the drop-off preventing portion 16 a provided on the fixed guide rail 16 is maintained in contact with the contact surface 53 a 1 of the stopper 53 . As a result, it is possible to reliably prevent the sheet feeding tray 103 from falling out of the main body of the sheet storage device 102 . The stopper 53 (stopper member) has a storage restriction portion 55 (restriction portion).

As shown in FIG. 10(a), when the slider 51 (slide member) is at the impact attenuation position, the storage restriction portion 55 (restriction portion) allows the stopper 53 (stopper member) to move to the storage position shown in FIG. 10(b). restrict movement to As shown in FIG. 10(a), the retraction restricting portion 55 (limiting portion) of the stopper 53 (stopper member) is movable through an opening 51b1 (first opening) provided in the slider 51 (slide member). It abuts on the lower guide portion 14d of the guide rail 14 (rail member). This restricts the movement of the stopper 53 (stopper member) to the retracted position shown in FIG. 10(b).

8 and 10(b), the stopper 53 is opened before the drop-off prevention portion 16a provided on the fixed guide rail 16 and the contact surface 53a1 provided on the stopper 53 of the drop-off prevention detachable portion 15 come into contact with each other. Indicates the depressed state. As shown in FIGS. 8 and 10(b), the stopper 53 of the detachment prevention part 15 is pushed down. In this state, the feed tray 103 is pulled out from the sheet storage device 102 in the direction of the arrow A1 in FIG. 8 to open. Then, the protrusion 53 a of the stopper 53 can pass below the lower end of the drop-off preventing portion 16 a provided on the fixed guide rail 16 . As a result, the feed tray 103 can be pulled out and removed from the main body of the sheet storage device 102 .

As shown in FIG. 10(a), before the drop-off prevention portion 16a provided on the fixed guide rail 16 and the contact surface 53a1 provided on the stopper 53 of the drop-off prevention detachable portion 15 abut against each other, As shown in b), the stopper 53 of the detachable portion 15 is pushed down. In this case, the storage restricting portion 55 projecting from the lower portion of the stopper 53 passes through the opening 51b1 provided in the bottom surface 51b of the slider 51 and is accommodated in the opening 14d1 provided in the middle of the lower guide portion 14d. be.

That is, the stopper 53 (stopper member) engages with the drop-off preventing portion 16a (engagement member). Before that, the stopper 53 is moved to the storage position shown in FIG. 10(b) against the biasing force of the stopper spring 54 (second biasing member). At that time, the storage restricting portion 55 (restricting portion) passes through the opening 51b1 (first opening) provided in the slider 51 (slide member) and the opening 14d1 (first opening) provided in the movable guide rail 14 (rail member). second opening).

As a result, the retraction restricting portion 55 does not come into contact with the lower guide portion 14 d provided on the movable guide rail 14 . Thereby, the stopper 53 can be stored in the slider 51 . FIG. 10(b) shows a retracted position in which the stopper 53 (stopper member) is retracted inside the slider 51 (slide member) against the biasing force of the stopper spring 54 (second biasing member). show.

Consider the sheet storage device 102 having the drop-off preventing detachable portion 15 on the movable guide rail 14 . Then, consider the case where the sheet feeding tray 103 capable of stacking a large amount of sheets S is provided. Even in this case, when the sheet feeding tray 103 is pulled out from the main body of the sheet storage device 102 and opened, it is possible to prevent the generation of a loud impact sound and the damage. In addition, the user can remove or mount the feed tray 103 from the main body of the sheet storage device 102 without lifting the feed tray 103 .

Note that this embodiment is an example of the case where the detachment prevention part 15 is provided on the movable guide rail 14 . It is not always necessary to provide the drop-off preventing/detachable portion 15 on the movable guide rail 14 , and the drop-off preventing/detachable portion 15 may be provided on a body frame (not shown) of the sheet storage device 102 other than the movable guide rail 14 or on the side of the feed tray 103 . .

16a... Falling prevention part (engagement member)
51 ... Slider (slide member)
52... Slider spring (first biasing member)
53... Stopper (stopper member)
55... Storage regulation part (regulation part)

Claims (5)

In a sheet storage device in which a sheet storage portion for storing sheets is provided detachably from a body portion of the sheet storage device,
The sheet storage section is
In order to detachably support the seat storage section with respect to the main body section, a rail member having a shape extending in a direction parallel to the direction in which the seat storage section is removed from the main body section; a slide member movable with respect to the rail member; a first biasing member biasing the slide member in the removal direction; a stopper member movable in a direction intersecting the removal direction of the slide member; a second biasing member that biases the stopper member to protrude from the slide member;
the main body includes an engaging member that can be engaged with the stopper member that protrudes from the slide member by the second biasing member;
The stopper member engages with the engaging member and attenuates the impact received by the slide member by compressing the first biasing member;
The sheet storage portion is prevented from falling off from the main body portion by engaging the stopper member with the engaging member,
In a state in which the stopper member protrudes from the slide member by the second biasing member, the second biasing member is compressed via the stopper member so that the stopper member is engaged with the engaging member. A sheet storage device, characterized in that it can be retracted from a position where it can be put together and can be removed from the main body. 2. The sheet storage device according to claim 1, wherein the first biasing member is a first spring having one end fixed to the rail member and the other end fixed to the slide member. the stopper member includes a restricting portion protruding in a direction parallel to the compression direction of the second biasing member;
3. The sheet storage device according to claim 1, wherein the slide member has an opening at a position corresponding to the restricting portion. the rail member includes an engaging portion that contacts the restricting portion and can engage the restricting portion;
The restricting portion abuts the locking portion through the opening in a state in which the first biasing member is compressed by engaging the stopper member with the engaging member. The sheet storage device according to claim 3. 5. The restricting portion according to claim 4, wherein, in a state in which the first biasing member is not compressed, the restricting portion is movable in a direction away from the engaging member through the opening. sheet storage device.

Images