Sheet storage apparatus and image forming apparatus

Abstract

The invention relates to a sheet storage apparatus and an image forming apparatus. The sheet storage apparatus includes: a stacking member that ascends and descends; a first adjustment unit including: a fixing member fixed to the stacking member and lifted together with the stacking member; a movable member that is disposed so as to be movable with respect to the fixed member in a lifting direction of the fixed member, and that is capable of coming into contact with an upstream-side end portion of the sheet; and a biasing member that applies a force to the movable member in a rising direction of the fixed member; and a restricting portion configured to restrict movement of the movable member in the rising direction when the stacking member rotates in the rising direction.

Description

Technical Field

[0001] The present invention relates to a sheet storage device for storing sheets and an image forming apparatus (such as a copying machine, a printer, a facsimile machine, or a composite device having a plurality of such functions) provided with the sheet storage device. Background Art

[0002] Conventionally, a sheet feeding cassette, i.e., a sheet stacking unit capable of storing a plurality of sheets of different sizes, is generally used in a sheet storage device for storing sheets. In such a sheet feeding cassette, a sheet guide as an adjusting member is movably arranged, and the adjusting member can adjust the position of the sheet according to the size of the stored sheet and detect the size of the sheet. As such a sheet guide, a side guide for adjusting the sheet from both sides in the width direction orthogonal to the sheet feeding direction, and a rear end guide for adjusting the position of the rear end in the sheet feeding direction from the upstream side in the sheet feeding direction are known.

[0003] Here, among the sheets stored in the sheet feed cassette, there is a type of sheet which is called a label sheet and whose shape is not a simple rectangle. The label sheet is a sheet in which a label for inputting a title is arranged on the end side of the sheet in order to classify the document. The positions of the labels arranged on the label sheet are not constant but are shifted from each other so that the title input on the label can be easily checked. Therefore, in order to stably adjust the rear end of the label sheet in the feeding direction, it is necessary to arrange the adjustment surface over the entire area in the width direction of the sheet.

[0004] Japanese Patent Publication No. 2001-213529 discloses a sheet storage device that uses an adapter for label sheets to store label sheets. The sheet storage device of Japanese Patent Publication No. 2001-213529 includes a rotatable sheet stacking plate for stacking sheets, and a spring for pushing up the sheet stacking plate. In the sheet storage device of Japanese Patent Publication No. 2001-213529, by attaching an adapter to a sheet stacking member in which a label sheet rear end guide is arranged in substantially the entire area of ​​the width of the A4 size and the letter size, the rear end can be adjusted regardless of the position of the label of the A4 size and the letter size label sheets. Therefore, the sheet storage device of Japanese Patent Publication No. 2001-213529 can store a plurality of label sheets with the rear ends aligned.

[0005] However, in Japanese Patent Laid-Open No. 2001-213529, only the storage of A4-sized and letter-sized label sheets is considered, and there is a problem that the storage of A5-sized or smaller label sheets cannot be supported. For example, in the case of using an adapter obtained by simply moving the label sheet rear end guide of the adapter for A4-sized label sheets to the rear end position of the A5-sized label sheets, the number of stacked A5-sized label sheets is limited to about half the number of stacked A4-sized label sheets.

[0006] Specifically, in the case where an A4 size label sheet is set in a sheet stacking member to which an adapter is attached, when the sheet stacking member is rotated and raised, the rear end position of the A4 size label sheet is close to the rotation center of the sheet stacking member, so that the amount of movement in the height direction is small. Therefore, in this case, even if the sheet stacking member is raised to the maximum height, the adapter does not protrude from the upper end of the sheet feeding cassette.

[0007] On the contrary, when the A5 size label sheet is set in the sheet stacking member to which the adapter is attached, when the sheet stacking member is rotated and raised, the rear end position of the A5 size label sheet is away from the rotation center, so that the movement amount in the height direction is large. Therefore, in this case, when the sheet stacking member is raised to the maximum height, the adapter protrudes from the upper end of the sheet feeding box. In this regard, in order to prevent the adapter from protruding from the upper end of the sheet feeding box when the sheet stacking member is raised to the maximum height, it is necessary to limit the height of the adapter. Therefore, the number of A5 size label sheets that can be stacked is reduced. Summary of the invention

[0008] It is desirable to provide a sheet storage device and an image forming apparatus capable of storing small-sized label sheets without reducing the number of stackable label sheets.

[0009] The sheet storage device according to the present invention is a sheet storage device configured to store sheets, the sheet storage device comprising: a stacking member on which the sheets are stacked, the stacking member being configured to rise and fall; and a first adjusting unit, which is arranged on the stacking member and configured to adjust the position of the end portion on the upstream side of the sheet in the feeding direction of the sheet, the first adjusting unit comprising: a fixed member, which is fixed to the stacking member and is lifted and lowered together with the stacking member; a movable member, which is arranged to be movable relative to the fixed member in the lifting and lowering direction of the fixed member and is capable of abutting against the end portion on the upstream side of the sheet; and a biasing member, which applies a force to the movable member in the rising direction of the fixed member, the sheet storage device also comprising: a limiting portion, which is configured to limit the movement of the movable member in the rising direction when the stacking member rotates in the rising direction.

[0010] Further features of the present invention will become apparent from the following description of exemplary embodiments with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic diagram of an image forming apparatus according to an embodiment of the present invention;

[0012] Figure 2 is a perspective view of the sheet storage apparatus according to the embodiment of the present invention in a state where a label sheet attaching unit is not attached;

[0013] Figure 3 is a perspective view of the sheet storage apparatus according to the embodiment of the present invention in a state where a label sheet attaching unit is attached;

[0014] Figure 4 is a perspective view of a label sheet attaching unit of a sheet storage device according to an embodiment of the present invention;

[0015] Figure 5 is a sectional view of a label sheet attaching unit of a sheet storage device according to an embodiment of the present invention;

[0016] Figure 6 is a perspective view of the sheet storage apparatus according to the embodiment of the present invention in a state in which the sheet stacking member is raised;

[0017] Figure 7 is a schematic diagram showing a positional relationship between a side guide and a protrusion of a movable member in a state where a sheet stacking member of a sheet storage apparatus according to an embodiment of the present invention is not raised; and

[0018] Figure 8 is a schematic diagram illustrating a positional relationship between a side guide and a protrusion of a movable member in a state in which a sheet stacking member of the sheet storage apparatus according to an embodiment of the present invention is lifted. DETAILED DESCRIPTION

[0019] Hereinafter, embodiments will be described in detail with reference to the accompanying drawings.

[0020] <Structure of Image Forming Apparatus>

[0021] Will refer to Figure 1 The configuration of the image forming apparatus 10 according to the embodiment of the present invention is described in detail.

[0022] The image forming apparatus 10 includes: image forming parts 1Y, 1M, 1C, and 1K; a manual sheet feeding door 2; a fixing device 5; scanners 13Y, 13M, 13C, and 13K; a reader 21, and an intermediate transfer member 31. The image forming apparatus 10 includes: primary transfer parts 35Y, 35M, 35C, and 35K; a registration roller pair 40; a secondary transfer part 41; a discharge port 50, and a switching part 51. The image forming apparatus 10 also includes: a sheet storage device 61, a sheet storage device 62, a sheet storage device 63, a sheet storage device 64, a sheet feeding roller 70, a sheet feeding roller 71, a sheet feeding roller 72, a sheet feeding roller 73, and a sheet feeding roller 74.

[0023] The image forming parts 1Y, 1M, 1C, and 1K are arranged below the reader 21 of the apparatus body 100 of the image forming apparatus 10, and form images based on image information input from the scanners 13Y, 13M, 13C, and 13K, respectively. The image forming parts 1Y, 1M, 1C, and 1K include: photosensitive drums 11Y, 11M, 11C, and 11K; chargers 12Y, 12M, 12C, and 12K; developing devices 14Y, 14M, 14C, and 14K; and drum cleaning members 15Y, 15M, 15C, and 15K, respectively.

[0024] The photosensitive drums 11Y, 11M, 11C, and 11K are rotationally driven by a motor not shown.

[0025] The chargers 12Y, 12M, 12C, and 12K uniformly charge the surfaces of the photosensitive drums 11Y, 11M, 11C, and 11K, respectively.

[0026] The developing devices 14Y, 14M, 14C and 14K supply toner to the electrostatic latent images formed on the photosensitive drums 11Y, 11M, 11C and 11K by the scanners 13Y, 13M, 13C and 13K, respectively, to form toner images on the photosensitive drums 11Y, 11M, 11C and 11K.

[0027] The drum cleaning members 15Y, 15M, 15C, and 15K remove transfer residual toner remaining on the surfaces of the photosensitive drums 11Y, 11M, 11C, and 11K after transfer, from the surfaces of the photosensitive drums 11Y, 11M, 11C, and 11K, respectively.

[0028] The manual sheet feeding door 2 is arranged to be openable and closable relative to the apparatus body 100 , and in an open state functions as a manual feed tray of a manual type on which a sheet S can be manually set.

[0029] The fixing device 5 applies heat and pressure to the toner image transferred onto the sheet S conveyed by the secondary transfer portion 41 to fix the toner image onto the sheet S. The fixing device 5 conveys the sheet S on which the toner image is fixed toward the discharge port 50 .

[0030] The scanners 13Y, 13M, 13C, and 13K photoelectrically convert image information input from the reader 21. The scanners 13Y, 13M, 13C, and 13K form electrostatic latent images on the photosensitive drums 11Y, 11M, 11C, and 11K charged by the chargers 12Y, 12M, 12C, and 12K, respectively, based on the photoelectrically converted image information.

[0031] The reader 21 is disposed at the upper portion of the apparatus body 100 and includes a scanning optical system for reading an image of a document. The reader 21 reads an image of the document through the scanning optical system and outputs image information of the read image to the scanners 13Y, 13M, 13C, and 13K.

[0032] The intermediate transfer member 31 conveys the toner images transferred by the primary transfer portions 35Y, 35M, 35C, and 35K to the secondary transfer portion 41 .

[0033] The primary transfer portions 35Y, 35M, 35C, and 35K transfer the toner images formed on the photosensitive drums 11Y, 11M, 11C, and 11K to the intermediate transfer member 31 , respectively.

[0034] The registration roller pair 40 conveys the sheet S fed by the sheet feeding roller 70 , the sheet feeding roller 71 , the sheet feeding roller 72 , or the sheet feeding roller 73 to the secondary transfer portion 41 according to the conveyance timing of the toner image transferred to the intermediate transfer member 31 .

[0035] The secondary transfer portion 41 transfers the toner image transferred to the intermediate transfer member 31 onto the sheet S conveyed by the registration roller pair 40 , and conveys the sheet S to which the toner image is transferred toward the fixing device 5 .

[0036] The discharge port 50 discharges the sheet S conveyed by the fixing device 5 to the outside of the apparatus body 100 .

[0037] In the case where the single-sided image forming mode is selected, or in the case where the double-sided image forming mode is selected and the toner image is fixed on both sides of the sheet S, the switching portion 51 guides the sheet S conveyed by the fixing device 5 to the discharge port 50. In the case where the double-sided image forming mode is selected and the toner image is fixed on only one side of the sheet S, the switching portion 51 guides the sheet S conveyed by the fixing device 5 so that the sheet S is conveyed to the secondary transfer portion 41 via the reversing path 52 and the double-sided path 85.

[0038] The sheet storage device 61, the sheet storage device 62, the sheet storage device 63, and the sheet storage device 64 are arranged below the apparatus body 100, and store the sheets S. Each of the sheet storage device 61, the sheet storage device 62, the sheet storage device 63, and the sheet storage device 64 has a front loading structure, that is, it is arranged on the front side of the apparatus body 100 so as to be inserted into and taken out of the apparatus body 100. Here, the sheets S stored in the sheet storage device 61, the sheet storage device 62, the sheet storage device 63, and the sheet storage device 64 are ordinary rectangular sheets or label sheets. Note that the structure of each of the sheet storage device 61, the sheet storage device 62, the sheet storage device 63, and the sheet storage device 64 will be described in detail later.

[0039] The sheet feeding roller 70 feeds the sheet S set on the manual feed tray constituted by the manual sheet feeding door 2 in an open state to the registration roller pair 40 .

[0040] The sheet feeding roller 71 feeds the sheets S stored in the sheet storage device 61 to the registration roller pair 40 .

[0041] The sheet feeding roller 72 feeds the sheets S stored in the sheet storage device 62 to the registration roller pair 40 .

[0042] The sheet feeding roller 73 feeds the sheets S stored in the sheet storage device 63 to the registration roller pair 40 .

[0043] The sheet feeding roller 74 feeds the sheets S stored in the sheet storage device 64 to the registration roller pair 40 .

[0044] <Configuration of Sheet Storage Device>

[0045] Will refer to Figure 2 and Figure 3 The configuration of each of the sheet storage device 61, the sheet storage device 62, the sheet storage device 63, and the sheet storage device 64 according to the embodiment of the present invention is described in detail. Note that since all the configurations of the sheet storage device 61, the sheet storage device 62, the sheet storage device 63, and the sheet storage device 64 are the same, the description and illustration of the configurations of the sheet storage device 62, the sheet storage device 63, and the sheet storage device 64 are omitted.

[0046] The sheet storage device 61 includes a sheet tray 110, a sheet stacking member 111, a side guide 112a, a side guide 112b, a rear end guide 113, and a label sheet attaching unit 114. The sheet storage device 61 includes a thumb screw 115, a lifter gear 116, a lifter plate 117, a locking portion 1101, a locking portion 1102, a release lever 1121, and a release lever 1131.

[0047] The sheet tray 110 stores the sheets S.

[0048] The sheet stacking member 111 as a stacking member supports the sheets S stored in the sheet tray 110. The sheets S are stacked on the sheet stacking member 111. The sheet stacking member 111 includes a hole 1111 for attaching a label sheet attachment unit 114. The sheet stacking member 111 is raised and lowered in a lifting direction orthogonal to the feeding direction and in a width direction orthogonal to the feeding direction by rotating around a rotation center 1112 on the upstream side of the feeding direction of the sheets S (hereinafter referred to as the "feeding direction"). Here, the feeding direction is from Figure 2 The direction of one side of the side guide 112a and the side guide 112b as seen from the rotation center 1112.

[0049] The side guide 112a as the second regulating member regulates the position of one end in the width direction. The side guide 112a is locked to the locking portion 1101 and is fixed to the sheet tray 110 so as to be movable in the width direction. The side guide 112a includes a hanging portion 1122a as a restricting portion, which abuts against a protrusion 11422a (described later) of the label sheet attaching unit 114.

[0050] The side guide 112b as the second regulating member regulates the position of the other end in the width direction. The side guide 112b is locked to the locking portion 1101 and is fixed to the sheet tray 110 so as to be movable in the width direction. The side guide 112b includes a hanging portion 1122b as a restricting portion, which abuts against a protrusion 11422b (described later) of the label sheet attaching unit 114.

[0051] The rear end guide 113 as the third regulating member is locked to the locking portion 1102 so as to be movable in the feeding direction so that the position in the feeding direction can be changed, and is supported by the sheet tray 110. The rear end guide 113 regulates the position on the upstream side in the feeding direction of the sheets S other than the label sheets stored in the sheet tray 110. In the case where the sheets S stored in the sheet tray 110 are label sheets, the rear end guide 113 retreats to the upstream side in the feeding direction.

[0052] The label sheet attaching unit 114 as the first regulating member is detachably attached to the sheet stacking member 111. In the case where the sheet S stored in the sheet tray 110 is a label sheet, the label sheet attaching unit 114 is attached to the sheet stacking member 111 to adjust the position of the end portion on the upstream side in the feeding direction of the sheet S. The portion of the label sheet attaching unit 114 that can contact the end portion on the upstream side of the sheet S is longer in the width direction than the portion of the rear end guide 113 that can contact the end portion on the upstream side of the sheet S. Note that the configuration of the label sheet attaching unit 114 will be described in detail later.

[0053] The thumb screw 115 fixes the label sheet attaching unit 114 to the sheet stacking member 111 .

[0054] The elevator gear 116 rotates by receiving a driving force from a driving source (not shown) disposed in the device body 100 .

[0055] When the elevator gear 116 rotates, the elevator plate 117 moves along with the rotation of the elevator gear 116 .

[0056] The locking portion 1101 is arranged in the sheet tray 110. The locking portion 1101 locks the side guides 112a and 112b to the sheet tray 110.

[0057] The release lever 1121 is operated by a user. The release lever 1121 releases the lock between the locking portion 1101 and the side guides 112a and 112b to enable the side guides 112a and 112b to move in the width direction.

[0058] The locking portion 1102 is arranged in the sheet tray 110 . The locking portion 1102 locks the rear end guide 113 to the sheet tray 110 .

[0059] The release lever 1131 is operated by a user. The release lever 1131 releases the lock between the locking portion 1102 and the rear end guide 113 to enable the rear end guide 113 to move in the feeding direction or in the direction opposite to the feeding direction.

[0060] When the user provides sheets S, the sheet storage device 61 having the above-described configuration is pulled out from the apparatus main body 100. After the sheet storage device 61 is pulled out from the apparatus main body 100, the side guides 112a, 112b, and the rear end guide 113 are positioned at predetermined positions according to the size of the sheets S, and the sheets S are set in the sheet tray 110. Then, the sheet storage device 61 is inserted into the apparatus main body 100 again.

[0061] <Configuration of Label Sheet Attaching Unit>

[0062] Will refer to Figure 4 and Figure 5 The configuration of the label sheet attaching unit 114 of the sheet storage apparatus 61 according to the embodiment of the present invention is described in detail.

[0063] The label sheet attaching unit 114 includes a fixed member 1141 , a movable member 1142 , and a biasing spring 1143 .

[0064] The fixing member 1141 is attached to the sheet stacking member 111 and can be raised and lowered together with the sheet stacking member 111. The fixing member 1141 includes a boss 11411, a retaining portion 11412, and a rear end regulating surface 11413.

[0065] The boss 11411 protrudes relative to the sheet stacking member 111 in the attaching direction of the label sheet attaching unit 114 , and is inserted into the hole 1111 of the sheet stacking member 111 .

[0066] The retaining portions 11412 are arranged at both ends in the width direction of the fixed member 1141. The retaining portions 11412 engage with the snap-fit ​​portions 11421 (described later) of the movable member 1142 so as to be relatively movable, and the retaining portions 11412 hold the movable member 1142 so that the movable member 1142 does not fall off from the fixed member 1141.

[0067] The end portion on the upstream side in the feeding direction of the sheet S abuts against the rear end regulating surface 11413. When the sheet S is a label sheet, the rear end regulating surface 11413 abuts against the label of the label sheet.

[0068] The movable member 1142 is arranged to be movable relative to the fixed member 1141. The movable member 1142 includes a snap portion 11421, a protrusion 11422a, a protrusion 11422b, and a rear end regulation surface 11423.

[0069] The snap-fit ​​portion 11421 is movably engaged with the retaining portion 11412 of the fixed member 1141 so that the fixed member 1141 can retain the movable member 1142 .

[0070] The protrusion 11422a protrudes laterally outward from one end in the width direction of the movable member 1142. When the movable member 1142 rises, the protrusion 11422a abuts against the hanging portion 1122a of the side guide 112a to restrict the rise of the movable member 1142.

[0071] The protrusion 11422b protrudes laterally outward from the other end in the width direction of the movable member 1142. When the movable member 1142 rises, the protrusion 11422b abuts against the hanging portion 1122b of the side guide 112b to restrict the rise of the movable member 1142.

[0072] The end portion on the upstream side in the feeding direction of the sheet S abuts against the rear end regulating surface 11423. When the sheet S is a label sheet, the rear end regulating surface 11423 abuts against the label of the label sheet.

[0073] A biasing spring 1143 as a biasing member is arranged between the fixed member 1141 and the movable member 1142. When the label sheet attaching unit 114 is attached to the sheet stacking member 111, the biasing spring 1143 applies force to the movable member 1142 in the ascending direction of the sheet stacking member 111.

[0074] The label sheet attaching unit 114 having the above-described configuration is positioned relative to the sheet stacking member 111 by inserting the boss 11411 of the fixing member 1141 into the hole 1111 of the sheet stacking member 111. Then, the label sheet attaching unit 114 is attached and fixed to the sheet stacking member 111 by tightening the thumb screw 115.

[0075] When the user sets the label sheet on the sheet tray 110, the rear end regulating surface 11413 of the fixed member 1141 and the rear end regulating surface 11423 of the movable member abut against the label of the label sheet to adjust the position of the label sheet. Since the lengths of the rear end regulating surface 11413 and the rear end regulating surface 11423 in the width direction are equal to the length of the A5 size sheet S in the width direction, unlike the rear end guide 113, the end of the upstream side of the feeding direction of the A5 size label sheet can be stably adjusted.

[0076] <Movement of Sheet Storage Device>

[0077] Will refer to Figures 6 to 8 The movement of each of the sheet storage device 61, the sheet storage device 62, the sheet storage device 63, and the sheet storage device 64 according to the embodiment of the present invention is described in detail. Note that since all the movements of the sheet storage device 61, the sheet storage device 62, the sheet storage device 63, and the sheet storage device 64 are the same, the description of the movement of the sheet storage device 62, the sheet storage device 63, and the sheet storage device 64 is omitted.

[0078] In a state where the sheet stacking member 111 is not lifted, the protrusion 11422a and the hanging portion 1122a of the side guide 112a are separated from each other, and the protrusion 11422b and the hanging portion 1122b of the side guide 112b are separated from each other.

[0079] When the lifter gear 116 and the lifter plate 117 are driven, the sheet stacking member 111 is lifted by rotating about the rotation center 1112 .

[0080] At this time, since the fixed member 1141 is fixed to the sheet stacking member 111, the fixed member 1141 rises with the rise of the sheet stacking member 111. In contrast, when the movable member 1142 rises together with the fixed member 1141 to a certain extent, the movable member 1142 reaches an abutment position where the protrusion 11422a abuts against the hanging portion 1122a and the protrusion 11422b abuts against the hanging portion 1122b, so that the rise is restricted.

[0081] Then, as the sheet stacking member 111 further rises, the fixing member 1141 rises while guiding the snap portion 11421 through the retaining portion 11412. By maintaining the state in which the protrusion 11422a abuts against the hanging portion 1122a and the protrusion 11422b abuts against the hanging portion 1122b, the rise of the movable member 1142 from the abutting position is restricted. The rise of the movable member 1142 can be restricted by a simple structure in which the protrusion 11422a abuts against the hanging portion 1122a and the protrusion 11422b abuts against the hanging portion 1122b.

[0082] When the sheet stacking member 111 is lowered and the movable member 1142 is lowered from the abutting position, the protrusions 11422a and 11422b are separated from the hanging parts 1122a and 1122b, respectively. Therefore, when the side guides 112a and 112b are moved to provide the sheet S to the sheet tray 110, the protrusions 11422a and 11422b do not contact the hanging parts 1122a and 1122b, respectively. Therefore, the side guides 112a and 112b can be easily operated in a state where the sheet stacking member 111 is not raised.

[0083] In this way, when the sheet stacking member 111 rises or falls, the label sheet attaching unit 114 is extended and retracted in the ascending and descending direction of the sheet stacking member 111. Therefore, label sheets of a small size such as A5 size can be stacked in the label sheet attaching unit 114 in the same number as A4 size label sheets.

[0084] In the present embodiment, the label sheet attaching unit 114 includes a fixed member 1141 that is fixed to the sheet stacking member 111, rises and falls together with the sheet stacking member 111, and can abut against the end portion on the upstream side of the sheet S. The label sheet attaching unit 114 includes a movable member 1142 that is arranged to be movable relative to the fixed member 1141 in the lifting and lowering direction of the fixed member 1141, and can abut against the end portion on the upstream side of the sheet S. The label sheet attaching unit 114 also includes a biasing spring 1143 that applies a force to the movable member 1142 in the rising direction of the fixed member 1141.

[0085] In this embodiment, the sheet storage device 61 includes the hanging portion 1122a and the hanging portion 1122b, which restrict the movement of the movable member 1142 in the ascending direction when the sheet stacking member 111 rotates in the ascending direction. Therefore, small-sized label sheets can be stored without reducing the number of sheets that can be stacked.

[0086] In the present embodiment, by arranging the hanging portion 1122a on the side guide 112a and arranging the hanging portion 1122b on the side guide 112b, the position of the sheet S in the width direction can be adjusted while restricting the rise of the movable member 1142.

[0087] It goes without saying that the present invention is not limited to the above-described embodiments, and various modifications may be made without departing from the gist of the present invention.

[0088] Specifically, in the above-described embodiment, the rise of the movable member 1142 is restricted by the hanging portion 1122a of the side guide 112a and the hanging portion 1122b of the side guide 112b. However, this is not restrictive, and the rise of the movable member 1142 may be restricted by a member other than the side guide 112a and the side guide 112b of the sheet storage device 61. For example, the main body of the sheet tray 110 may be provided with a portion that contacts the movable member 1142 and restricts the rise of the movable member 1142. The device main body 100 of the image forming device 10 may be provided with a portion that contacts the movable member 1142 and restricts the rise of the movable member 1142.

[0089] In the above embodiment, the protrusion 11422a abuts against the hanging portion 1122a and the protrusion 11422b abuts against the hanging portion 1122b, so that the rise of the movable member 1142 is restricted. However, this is not restrictive, and the rise of the movable member 1142 can be restricted by any uneven shape arranged in the sheet storage device 61.

[0090] In the above-described embodiment, the label sheet attaching unit 114 is detachably attached to the sheet stacking member 111 , but this is not restrictive, and the label sheet attaching unit 114 may be fixed to the sheet stacking member 111 so as not to be detachable.

[0091] While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments.The scope of the following claims is to be accorded the broadest interpretation so as to encompass all such modifications and equivalent structures and functions.

[0092] This application claims priority from Japanese Patent Application No. 2023-129945, filed on August 9, 2023, the entire contents of which are incorporated herein by reference.

Claims

1. A sheet material storage device configured to store sheets, the sheet material storage device comprising: a stacking member on which the sheets are stacked, the stacking member being configured to ascend and descend; as well as a first adjusting unit arranged on the stacking member and configured to adjust a position of an end portion on an upstream side of the sheet in a feeding direction of the sheet, The first adjustment unit comprises: a fixing member fixed to the stacking member and lifted and lowered together with the stacking member; a movable member arranged to be movable relative to the fixed member in the lifting direction of the fixed member and to be able to abut against an end portion on the upstream side of the sheet; and a biasing member that applies a force to the movable member in a rising direction of the fixed member, The sheet material storage device further comprises: A restricting portion is configured to restrict movement of the movable member in the ascending direction when the stacking member is rotated in the ascending direction.

2. The sheet material storage device according to claim 1, wherein: The movable member comprises: a protrusion that protrudes in a width direction orthogonal to the feeding direction and the lifting direction, and The restricting portion restricts movement of the movable member in the ascending direction by abutting against the protrusion.

3. The sheet material storage device according to claim 2, wherein: When the stacking member is lowered from the abutting position where the restricting portion and the protrusion abut each other, the restricting portion is separated from the protrusion.

4. The sheet material storage device according to claim 1, further comprising: A second adjusting unit is configured to adjust a position in a width direction orthogonal to the feeding direction of the sheet and the lifting direction, wherein: The restricting portion is disposed on the second regulating unit.

5. The sheet material storage device according to claim 1, wherein: A label sheet as a sheet is stacked on the stacking member, and The first adjustment unit adjusts the position of the upstream end of the label sheet by coming into contact with the label of the label sheet.

6. The sheet material storage device according to claim 1, wherein: The first adjustment unit is detachably attached to the stacking member.

7. The sheet material storage device according to claim 1, further comprising: A third regulating unit is configured to regulate the sheet by abutting against an end portion of the sheet on the upstream side, wherein: A portion of the first regulating unit that can contact the upstream end of the sheet is longer than a portion of the third regulating unit that can contact the upstream end of the sheet in a width direction orthogonal to the feeding direction and the lifting direction.

8. The sheet material storage device according to claim 1, wherein: The stacking member ascends and descends by rotating about a rotation center arranged on an upstream side in a feeding direction of the sheets.

9. The sheet material storage device according to claim 1, wherein: The fixing member can come into contact with an end portion on the upstream side of the sheet.

10. An image forming device, comprising: The sheet material storage device according to claim 1; as well as An image forming section is configured to form an image on the sheets stored in the sheet storage device.

Images