JP5109544B2 - Paper guide device - Google Patents

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to feeding of recording paper from a paper feed tray or the like in an image forming apparatus such as a copying machine, a printer, or a facsimile, and in particular, a paper guide device that guides the peripheral edge of the paper according to the size of the recording paper About.

  An image forming apparatus such as a copying machine, a printer, or a facsimile is provided with a paper feed tray on which paper such as originals and recording paper is loaded, and image formation is performed on the paper loaded on the paper feed tray at a predetermined timing. A sheet is fed one by one to an image forming process unit in the apparatus, and an image is formed on each sheet.

  In the paper feed tray as described above, the side edges of the stacked paper are aligned, and the peripheral edge of the stacked paper is guided so that the paper is supplied in the correct posture from the tray to the image forming process unit. A paper guide device is provided. There are various sizes of paper used in the image forming apparatus such as B5 size, A4 size, and A3 size, and the paper guide device can be adapted to these various sizes. A configuration in which a guide portion that guides the peripheral edge of the paper is movable is often used. Various mechanisms have been proposed for locking the guide portion as described above in the paper guide device at the correct position.

  For example, Patent Document 1 (Japanese Patent No. 3693651) discloses a lock for preventing a guide from being displaced in a universal paper feeder that slides a side guide or a rear end guide according to various paper sizes to adjust the paper size. As a mechanism, the guide position is locked or unlocked by engaging a latch-shaped portion disposed on the guide mounting base at a constant pitch in the sliding direction and a latch-shaped portion provided on the sliding guide and movable by operation. A mechanism is disclosed.

In Patent Document 2 (Japanese Patent Laid-Open No. 2000-191146), a bottom plate for stacking paper and a pair of side fences for positioning the side of the paper are provided, and at least one of the side fences is pushed by the elasticity of the paper side. In a sheet feeding device having a sheet feeding tray having a side shifting member for shifting and positioning, a sheet feeding device is disclosed in which a sheet pressing surface of the side shifting member is a raised surface.

Patent Document 3 (Japanese Patent Laid-Open No. 2002-338063) describes a paper feeding device that includes a side fence that regulates a position in a direction orthogonal to the paper feeding direction, and supplies the paper to a predetermined position. A guide member having a flat surface for guiding in a direction perpendicular to the feeding direction of the paper and an elastic member for pressing the guide member in the width direction of the paper are detachably provided on the side fence. A paper device is disclosed.
Japanese Patent No. 3693651 JP 2000-191146 A JP 2002-338063 A

  However, in Patent Document 1, racks and pinions are arranged in parallel in order to prevent guide skew due to backlash of the side guide, but the gap between the paper and the guide caused by the constant interval pitch of the latch is solved. In other words, there is a problem that it is impossible to prevent the occurrence of skew (paper skew).

  Moreover, although the thing of patent document 2 and patent document 3 attached | subjected width-shifting members, such as a side-shifting member and an elastic member, to the inner side of a side guide, such a width-shifting member is specifically ,. , Because it is a material having a raised surface or foamed polyurethane, the position accuracy of the guide is low, and the holding power of the paper is weak, causing problems such as skew, and the printing accuracy is reduced. There was a problem.

  In order to cope with the above problems, a paper guide device according to the present invention includes a bottom plate on which paper is stacked, an edge guide that regulates a peripheral edge of the paper, and a bottom plate that is provided on the bottom plate in the edge guide moving direction. A lock member having a side lock tooth portion, a lock member receiving recess provided in the edge guide, and a lock member having a lock claw that is attached to the lock member receiving recess and engages with the bottom plate side lock tooth portion. Is provided with a sliding convex portion and a rotating convex portion, and the edge guide receives the sliding convex portion of the lock member and holds the lock member slidably in the moving direction of the edge guide. The slide accommodating portion and the rotation convex portion of the lock member are received and the lock member is rotatably held with respect to the edge guide. A pivot accommodating unit that, characterized in that is provided.

  Further, in the paper guide device according to the present invention, the lock member is provided with an operation concave portion, the slide convex portion and the pivot convex portion of the lock member, and the slide guide housing of the edge guide. And the rotation accommodating portion separate the engagement between the lock claw of the lock member and the bottom plate side lock tooth portion by the pressing of the operation recess, and release the operation recess to depress the lock member. After the rotational movement with respect to the edge guide, the lock member is slid and moved in the movement direction of the edge guide.

  In the paper guide device according to the present invention, a spring member that urges the lock member in the moving direction of the edge guide is provided in the lock member housing recess.

  In the paper guide device according to the present invention, the relative positional relationship between the sliding convex portion and the rotating convex portion is changed by elastic deformation of the lock member.

  In the paper guide device according to the present invention, a notch is provided between the slide protrusion and the rotation protrusion of the lock member, and the notch height of the notch is determined by the operation. It is characterized by being set higher than the concave portion for use.

  In the paper guide device according to the present invention, the height of the operation concave portion of the lock member is between the height of the central axis of the spring member and the height of the rotation convex portion of the lock member. It is characterized by that.

  The sheet guide device according to the present invention is characterized in that a movable slide amount of the slide convex portion in the slide accommodating portion is approximately one pitch of a lock interval of the bottom plate side lock tooth portion.

  In the paper guide device according to the present invention, the edge guide includes a first edge guide and a second edge guide for regulating both side edges of the paper, and is integrated with the first edge guide. A first rack portion provided; a second rack portion provided integrally with the second edge guide; and a pinion member engaged with both the first rack portion and the second rack portion. And

  In the paper guide device of the present invention, when the lock claw performs the locking operation, the lock claw rotates and the lock position is determined. It can be moved and brought into contact with the paper side. Further, by providing the operation claw of the lock claw between the rotation projection and the spring member, the operation sequence at the time of locking can generate the order of rotation movement (lock) → slide movement.

  Also, a plurality of fulcrums (rotating convex portions, sliding convex portions) of the lock member are provided, one of which is constrained to a rotating fulcrum (rotating convex portion: non-slidable) state, and the other fulcrum (sliding convex portion). ) Is a slidable fulcrum, and the relative positional relationship between the two fulcrums is changed by elastic deformation, so that the rotation fulcrum ( The rotation convex part) is fixed and can be locked smoothly and reliably, and a structure is allowed in which sliding movement is permitted after the locking is completed. Furthermore, the sliding movement of the lock member can be surely performed by the force for restoring the elastic deformation.

  According to the paper guide device configured as described above, the edge guide can be positioned and locked in accordance with the paper size without affecting the pitch of the lock teeth, which has been a problem until now. The skew (skew of the paper) caused by the gap between the guide and the paper can be eliminated. In addition, the paper guide device according to the present invention can be configured with a relatively small number of parts, and skew countermeasures can be realized at low cost and in a small space.

  In addition, according to the paper guide device of the present invention, it is possible to eliminate the play that occurs due to the length that the trajectory of the lock claw rotating and kicking into the other lock tooth.

  In addition, according to the paper guide device of the present invention, the positioned edge guide can be aligned with the paper, so that a width adjusting member is attached to the inside of the side guide (Japanese Patent Laid-Open No. 2000-191146). Unlike Japanese Unexamined Patent Application Publication No. 2002-338063, etc., it is possible to achieve a paper guide with high positional accuracy and holding power of the guide and high printing accuracy (such as skew).

  Further, according to the paper guide device of the present invention, by providing the above-described configuration on the lock / unlock side, the left and right guides are interlocked and closely contacted with the rack and pinion. A high paper guide is possible.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 is a perspective view of a paper guide device according to an embodiment of the present invention as viewed from the front side, FIG. 2 is a perspective view of the paper guide device according to an embodiment of the present invention as viewed from the back side, and FIG. FIG. 4 is a view showing a lock member of a paper guide device according to an embodiment of the present invention, and FIG. 4 is a diagram (schematic cross-sectional view) showing a lock / unlock operation of the paper guide device according to an embodiment of the present invention; FIG. 5 is a diagram (perspective view of components and the like) showing the lock / unlock operation of the paper guide device according to the embodiment of the present invention. FIG. 1B is an enlarged view of the configuration shown in the circle of FIG.

  1 to 5, 10 is a paper guide device, 20 is a bottom plate, 31 is a first guide groove, 32 is a first rack groove, 33 is a second guide groove, 34 is a second rack groove, and 41 is a bottom plate side lock. Tooth part, 61 is a first side wall part, 62 is a second side wall part, 100 is a first edge guide, 101 is a first base part, 102 is a first guide part, 105 is a first engagement piece, 106 is a second side part Engagement piece, 120 is a first rack part, 121 is a first rack tooth part, 140 is a lock member receiving recess, 150 is a lock member, 151 is a main body part, 152 and 153 are arm parts, 154 and 155 are cut parts, 156 is an operation recess, 157 is a lock claw, 158 is a lock claw, 161 is a first elastic piece, 162 is a second elastic piece, 171 and 172 are rotation projections, 173 and 174 are slide projections, 181 , 182 is a housing for rotation, 183 and 184 are Riding storage part 190, spring member 200, second edge guide 200, second base part 201, second guide part 202, second rack part 220, second rack tooth part 221 and third tooth 263 An elastic piece, 264 is a fourth elastic piece, 300 is a pinion member, and 310 is a pinion mounting member.

  The paper guide device 10 is a part of a configuration that feeds an image forming process unit in an image forming apparatus such as a paper feed tray or a document tray, and stacks a plurality of sheets at once. A bottom plate 20 is provided. A first edge guide 100, a second edge guide 200, and a pinion member 300 are attached to the bottom plate 20 as main components, and function as the paper guide device 10 of the present invention.

  The bottom plate 20 has a structure such as a first guide groove 31, a first rack groove 32, a second guide groove 33, a second rack groove 34, and the like that come out from the front side to the back side, and is integrally formed of a synthetic resin material. Is formed. A structure for attaching the first side wall portion 61 and the second side wall portion 62 and the pinion attachment member 310 is provided on the back surface side of the bottom plate 20. The first edge guide 100, the second edge guide 200, the pinion member 300, and the like are also integrally formed of a synthetic resin material.

  The first edge guide 100 includes a first base portion 101 and a first guide portion 102 extending vertically from the first base portion 101 as a configuration located on the front side of the bottom plate 20. One peripheral edge is guided. A first engagement piece 105 and a second engagement piece 106 are formed on the back surface side of the first base portion 101, and a third engagement piece (not shown) is formed on the back surface side of the second base portion 201. Yes. Since the first engagement piece 105 and the second engagement piece 106 hold the first base portion 101 so as to be in close contact with the bottom plate 20, the first base portion 101 can be prevented from floating, and the lock tooth portion There is no intrusion between each other.

  Similarly, the second edge guide 200 includes a second base portion 201 and a second guide portion 202 extending perpendicularly from the second base portion 201 as a configuration located on the front side of the bottom plate 20. To guide the other peripheral edge of the sheet.

  The first edge guide 100 is provided with a lock member 150 that is configured to be operated by the user, whereas the second edge guide 200 is interlocked with the user operation of the first edge guide 100 by a rack and pinion configuration. Therefore, no operation unit or the like assuming a user operation is provided.

  The first edge guide 100 is provided with a lock member accommodating recess 140 that is a space for accommodating the lock member 150. A lock member 150 is attached to the lock member housing recess 140, and a spring member 190 that biases the lock member 150 is provided as illustrated.

  3A is a perspective view of the lock member, FIG. 3B is a front view, and FIG. 3C is a side view. The lock member 150 is an integrally molded product made of synthetic resin as shown in FIG. 3 and is configured to be elastically deformable. As shown in FIG. 3, the lock member 150 has a main body portion 151 and arm portions 152 and 153 on both sides of the main body portion 151.

  The main body 151 is formed with an operation recess 156 that is assumed to perform a user operation. The user releases the lock state by pinching between the operation recess 156 and the first guide portion 102, moves the first edge guide 100 in parallel with the paper, and positions it. 1 Release the hand from the guide portion 102 to bring it into a locked state.

  Further, the main body 151 is formed with a lock claw 157 and slide convex portions 173 and 174. The lock claw portion 157 is provided with a lock claw 158. When the lock claw 158 engages with the bottom plate side lock tooth portion 41 provided on the bottom plate 20, the first edge guide 100 and the bottom plate 20 are locked. When the lock claw 158 and the bottom plate side lock tooth portion 41 are separated from each other, the first edge guide 100 and the bottom plate 20 are unlocked. Further, as shown in FIG. 4, the lock claw 158 and the bottom plate side lock tooth portion 41 have a latch shape that allows the lock claw 158 to slide in one direction toward the paper P, thereby strengthening the lock holding force. It is supposed to be.

  Incisions 154 and 155 are formed between the main body 151 and the arm 153 of the main body 151 and the arm 152 so as to be particularly easily elastically deformed. Here, when “height” is defined in the direction of the arrow in FIGS. 3 and 4, the cut heights of the cut portions 154 and 155 are higher than the height of the operation concave portion 156.

  The arm portion 152 is provided with a rotating convex portion 171, and the arm portion 153 is provided with a rotating convex portion 172. As shown in FIGS. 4 and 5, the lock member accommodating recess 140 of the first edge guide 100 is a long hole that slidably accommodates the slide convex portions 173 and 174 provided on the main body 151 for a small amount of stroke. -Shaped slide accommodating portions 183 and 184 are provided. This slide amount d is as shown in FIG. The slide amount d that the slide convex portions 173 and 174 can slide in the slide accommodating portions 183 and 184 is preferably about one pitch of the interval between the lock teeth of the bottom plate side lock tooth portion 41. In the present embodiment, the slide accommodating portions 183 and 184 have a long hole shape, but the slide convex portions 173 and 174 can be slidably accommodated in a concave shape that is not a through hole.

  As shown in FIG. 4, the (center) height of the operation recess 156 of the lock member 150 is between the height of the center axis of the spring member 190 and the height of the rotation protrusions 171 and 172 of the lock member 150. It is set to become. According to such a height relationship of the three parties, it is possible to generate the order of rotational movement (lock) → slide movement as the operation sequence at the time of locking. That is, when the lock claw 158 performs the locking operation, after the lock claw 158 is rotated and the lock position is determined, the guide portion is further moved by sliding a minute amount (d). It can be moved and brought into contact with the paper side. Such a slidable slide amount d is set to about one pitch of the interval between the lock teeth of the bottom plate side lock tooth portion 41. The slide amount d is a desirable operation in the locking operation of the lock member 150, which is 1 pitch or more of the interval between the lock teeth, for example, 1.2 pitch, but the slide amount d is 0.8 pitch or 0.9 Even for the pitch, a sufficiently practical operation can be performed.

  Here, if the height of the operation concave portion 156 of the lock member 150 is equal to the height of the rotation convex portions 171 and 172 of the lock member 150, the slide convex portions 173 and 174 are slid. As a result, it is impossible to apply a force for rotating the convex portions 171 and 172 for rotation. Further, if the height of the operation recess 156 of the lock member 150 is equal to the height of the center axis of the spring member 190, the rotation protrusions 171 and 172 can be rotated. It becomes impossible to slide the convex portions 173 and 174 for sliding. In other words, the ideal locking operation in the present invention can be realized by using the above three height relationships.

  As a main configuration located on the back side of the bottom plate 20 of the first edge guide 100, there is a first rack portion 120, which is connected to the first guide portion 102 and the like. The main configuration located on the back surface side of the bottom plate 20 of the second edge guide 200 is a second rack portion 220, and the second rack portion 220 is connected to the second guide portion 202 and the like.

  A first side wall portion 61 and a second side wall portion 62 are formed on the back surface side of the bottom plate 20, and the first elastic piece 161 and the second elastic piece 162 of the first edge guide 100 are formed on the first side wall portion 61. Further, the third elastic piece 263 and the fourth elastic piece 264 of the second edge guide 200 are slidably provided on the second side wall portion 62. With the configuration of the side wall portion and the elastic piece as described above, the first rack portion 120 and the second rack portion 220 are biased toward the pinion member 300, and the meshing backlash between the rack and the pinion can be eliminated. It can be done.

  A second engagement piece 106 formed on the first base portion 101 of the first edge guide 100 is slidably inserted into the first guide groove 31, and the first guide groove 31 is inserted into the first rack groove 32. A connecting portion between the portion 102 and the first rack portion 120 and the first engaging piece 105 are slidably inserted.

  A third engagement piece (not shown) formed in the second base portion 201 of the second edge guide 200 is slidably inserted into the second guide groove 33, and the second rack groove 34 includes A connecting portion between the second guide portion 202 and the second rack portion 220 is slidably inserted.

  The first edge guide 100 and the second edge guide 200 move smoothly by the configuration of the groove portions such as the first guide groove 31, the first rack groove 32, the second guide groove 33, and the second rack groove 34 as described above. It has come to be.

  A first rack tooth portion 121 and a second rack tooth portion 221 are formed on the first rack portion 120 on the back surface side of the first edge guide 100 and the second rack portion 220 on the back surface side of the second edge guide 200, respectively. These rack teeth engage with the pinion gear of the pinion member 300 so as to face each other. The pinion member 300 is attached to the bottom plate 20 by a pinion attachment member 310. With such a rack and pinion configuration, the first edge guide 100 and the second edge guide 200 are interlocked with each other by the operation of the lock member 150 so that the peripheral edge of the paper P can be clamped from both sides. ing.

  Next, the lock / unlock operation performed by the lock member 150 configured as described above will be described. The state illustrated in FIG. 4A, the state illustrated in FIG. 5A, the state illustrated in FIG. 4B, the state illustrated in FIG. 5B, and the state illustrated in FIG. 4C. The state illustrated in FIG. 5C, the state illustrated in FIG. 4D, and the state illustrated in FIG. 5D correspond to each other.

  5A to 5D are diagrams showing the relationship between the convex portions of the lock member 150 in order from the left, a perspective view of the lock member 150, and a relationship diagram of the lock member 150 and the edge guide 100, respectively. It has become.

  4A and 5A show a state in which the lock claw 158 of the lock member 150 and the bottom plate side lock tooth portion 41 of the bottom plate 20 are locked. At this time, the slide projections 173 and 174 and the rotation projections 171 and 172 in FIG.

  4 (B) and 5 (B) show that the lock claw 158 and the bottom plate side lock tooth portion 41 are separated from each other by the user operation such that the operation concave portion 156 of the lock member 150 is pinched, and the lock release state is released. It shows a case. In such an unlocked state, the slide convex portions 173 and 174 in the slide accommodating portions 183 and 184 slide from the A side to the A ′ side due to elastic deformation between the main body portion 151 and the arm portions 152 and 153. (FIG. 4 (B)) and the rotation convex portions 171 and 172 in the rotation accommodating portions 181 and 182 rotate counterclockwise when viewed from the direction shown in FIG. 4 (B). As shown in FIG. 5B, the slide projections 173 and 174 and the rotation projections 171 and 172 of the lock member 150 are displaced by a slide amount d.

  Next, the user moves while holding the operation concave portion 156 of the lock member 150, and releases the operation concave portion 156 while the first edge guide 100 is placed on the peripheral edge of the desired paper P. Perform the action. At this time, first, as shown in FIGS. 4C and 5C, the rotation convex portions 171 and 172 of the lock member 150 rotate clockwise when viewed from the direction shown in FIG. 4B. The lock claw 158 and the bottom plate-side lock tooth portion 41 of the bottom plate 20 are engaged with each other to enter a locked state. Here, the slide convex portions 173 and 174 in the slide accommodating portions 183 and 184 are still on the A ′ side. Here, such a state is referred to as “lock first stage”.

  Next, as shown in FIGS. 4D and 5D, the slide convex portions 173 and 174 in the slide accommodating portions 183 and 184 slide from the A ′ side to the A side by the slide amount d. . At this time, since the lock claw 158 and the bottom plate side lock tooth portion 41 of the bottom plate 20 are in mesh with each other, the first guide portion 102 itself moves in the direction of the paper P by the slide amount d by the urging force of the spring member 190. Thus, the edge guide and the paper P can be locked in place without a gap. The state shown in FIG. 4D and FIG. 5D is referred to as “lock second stage”. As can be seen from the above, the slidable slide amount d of the slide convex portions 173 and 174 in the slide accommodating portions 183 and 184 is approximately one pitch of the interval between the lock teeth of the bottom plate side lock tooth portion 41. Thus, even if the engagement between the lock claw 158 and the bottom plate side lock tooth portion 41 is not optimal for guiding the paper P, it is supplemented and corrected by the slide d of approximately one pitch. Can be done.

  The slide amount d that the slide convex portions 173 and 174 can slide in the slide accommodating portions 183 and 184 is about one pitch of the interval between the lock teeth of the bottom plate side lock tooth portion 41. Depending on the configuration, due to kicking (interference with the lock teeth on the rotation trajectory of the lock claw 158), the lock claw could not fit into the lock teeth that it wanted to jump in (ie, it was not the optimal engagement between the lock claw and the lock teeth) ), Can be solved.

  As described above, in the present embodiment, the lock member 150 and the bottom plate 20 are locked by shifting from the first lock stage to the second lock stage as the lock operation stage. As shown in FIG. 4, the lock member 150 is operated by operating the lock member 150 as shown in FIG. 4 after the rotation by the rotation projections 171 and 172 and the slide operation by the slide projections 173 and 174. This is largely due to the fact that the height of the concave portion 156 is set to be between the height of the central axis of the spring member 190 and the height of the convex portions 171 and 172 for rotation of the lock member 150. . That is, according to such a three-part height relationship, the operation sequence at the time of locking can be generated in the order of rotational movement (locking) → sliding movement.

  As described above, in the present invention, a plurality of fulcrums (rotating convex portions, sliding convex portions) of the lock member 150 are provided, one of which is constrained to a rotational fulcrum (rotating convex portion: non-slidable), while the other The fulcrum (sliding convex part) is made a slidable fulcrum, and the relative positional relationship between the two fulcrums is changed by elastic deformation. In addition, the rotation fulcrum (rotating convex portion) is fixed and can be locked smoothly and reliably, and a structure in which sliding movement is permitted after the locking is completed is possible. Further, the sliding movement of the lock member 150 can be reliably performed by the force for restoring the elastic deformation.

  According to the paper guide device configured as described above, the edge guides (100, 200) can be positioned and locked in accordance with the paper size without affecting the pitch of the lock teeth. The skew (skew of the paper) due to the gap between the guide and the paper, which has been a problem until now, can be solved. In addition, the paper guide device according to the present invention can be configured with a relatively small number of parts, and skew countermeasures can be realized at low cost and in a small space.

  In addition, according to the paper guide device of the present invention, it is possible to eliminate the play that occurs due to the length that the trajectory of the lock claw rotating and kicking into the other lock tooth.

  In addition, according to the paper guide device of the present invention, the positioned edge guide can be aligned with the paper, so that a width adjusting member is attached to the inside of the side guide (Japanese Patent Laid-Open No. 2000-191146). Unlike Japanese Unexamined Patent Application Publication No. 2002-338063, etc., it is possible to achieve a paper guide with high positional accuracy and holding power of the guide and high printing accuracy (such as skew).

  The first rack portion 120 on the back surface side of the first edge guide 100 having the lock member 150 and the second rack portion 220 on the back surface side of the second edge guide 200 having the above-described configuration are respectively latched. The teeth engage with the pinion member 300 so as to face each other. With such a rack and pinion configuration, the first edge guide 100 and the second edge guide 200 can be interlocked to hold the peripheral edge of the paper P from both sides by operating the lock member 150 as described above. It can be done.

  Therefore, according to the paper guide device of the present invention, the left and right guides are interlocked and brought into close contact with the paper by the rack and pinion as described above, so that the paper guide with high accuracy of the paper center position can be achieved.

  In the embodiment of the present invention, the example in which the width direction of the sheet is regulated and guided by the first edge guide 100 and the second edge guide 200 has been described. However, the configuration of the present invention is not limited to the sheet width direction. The present invention can also be applied to a configuration in which only the rear end is guided. By using the rear end guide of the sheet according to this embodiment, even when paper is fed by the one-roller pickup system, there is no such thing as low alignment resolution or insufficient locking force of the rear end guide. Therefore, it is possible to solve the problem that the paper is retracted and the paper feeding is poor.

  The present invention relates to an electrophotographic copying machine, an electrophotographic facsimile, an electrophotographic printer, an electrophotographic compound machine, an ink jet copying machine, an ink jet facsimile, an ink jet printer, and an ink jet compound. The present invention can be applied to a paper guide device used in an image forming apparatus such as a printer. Although details of electrophotographic and inkjet printing techniques will not be described, any known technique can be used in any of the systems.

  While various embodiments have been described above, inventions configured by appropriately combining the components of the respective embodiments are also included in the scope of the present invention.

It is the perspective view which looked at the paper guide apparatus which concerns on embodiment of this invention from the front side. It is the perspective view which looked at the paper guide device concerning the embodiment of the present invention from the back side. It is a figure which extracts and shows the locking member of the paper guide device concerning the embodiment of the present invention. FIG. 5 is a diagram (schematic cross-sectional view) illustrating a locking operation of the paper guide device according to the embodiment of the present invention. It is a figure (perspective view of components etc.) which shows the locking operation of the paper guide apparatus which concerns on embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Paper guide apparatus, 20 ... Bottom plate, 31 ... 1st guide groove, 32 ... 1st rack groove, 33 ... 2nd guide groove, 34 ... 2nd rack groove, 41... Bottom plate side lock tooth portion, 61... First side wall portion, 62... Second side wall portion, 100... First edge guide, 101. 1st guide part, 105 ... 1st engagement piece, 106 ... 2nd engagement piece, 120 ... 1st rack part, 121 ... 1st rack tooth part, 140 ... Lock member Housing recess, 150 ... lock member, 151 ... main body, 152,153 ... arm, 154,155 ... cut-in portion, 156 ... operating recess, 157 ... lock claw 158 ... Lock claw, 161 ... first elastic piece, 162 ... second elastic piece, 171, 172 ... rotation Convex part, 173, 174 ... Sliding convex part, 181, 182 ... Rotating accommodating part, 183, 184 ... Sliding accommodating part, 190 ... Spring member, 200 ... Second edge Guide, 201 ... second base part, 202 ... second guide part, 205 ... third engagement piece, 220 ... second rack part, 221 ... second rack tooth part, 263 ... third elastic piece, 264 ... fourth elastic piece, 300 ... pinion member, 310 ... pinion mounting member

Claims (8)

A bottom plate on which paper is loaded;
An edge guide that regulates the peripheral edge of the paper;
A bottom plate side lock tooth portion provided on the bottom plate over the edge guide moving direction;
A locking member housing recess provided in the edge guide;
A lock member attached to the lock member housing recess and having a lock claw that can be engaged with or separated from the bottom plate side lock tooth portion,
The lock member is provided with a slide projection and a rotation projection,
The edge guide receives the slide convex portion and holds the lock claw so as to be slidable in the moving direction of the edge guide, and receives the pivot convex portion and the pivot convex portion. A pivot housing that holds the lock member so as to be pivotable .
The paper guide device according to claim 1, wherein the edge guide is slidable in accordance with elastic deformation of the lock member .   The lock claw is separated and slid with respect to the bottom plate side lock tooth portion by elastically deforming the lock member provided with a cut portion between the slide convex portion and the rotation convex portion. The paper guide apparatus according to claim 1, wherein The lock member is provided with an operation recess,
The slide convex portion and the pivot convex portion of the lock member, and the slide accommodating portion and the pivot accommodating portion of the edge guide,
The engagement of the lock claw and the bottom plate side lock tooth portion is separated by pressing the operation concave portion, the slide convex portion is slid in the movement direction of the edge guide in the slide accommodating portion, and The engagement relationship is such that the edge guide is slid in the moving direction of the edge guide after the lock claw and the bottom plate side lock tooth portion are engaged by releasing the depression of the operation recess. The paper guide device according to claim 1 or 2.   The paper guide device according to any one of claims 2 to 3, wherein a height of the cut of the cut portion is set higher than that of the operation concave portion. The lock member housing recess is provided with a spring member that biases the lock member in the moving direction of the edge guide,
The height of the operation concave portion of the lock member is between the height of the central axis of the spring member and the height of the rotation convex portion of the lock member. The paper guide device according to any one of 4.   The movable slide amount of the slide convex portion in the slide accommodating portion is approximately one pitch of the lock interval of the bottom plate side lock tooth portion, according to any one of claims 1 to 5. Paper guide device.   The paper guide device according to claim 1, wherein the slide accommodating portion has a long hole shape or a concave shape.   The edge guide includes a first edge guide and a second edge guide that regulate both side edges of the paper, a first rack portion that is provided integrally with the first edge guide, and the second edge guide. The second rack portion provided integrally with the edge guide, and a pinion member that meshes with both the first rack portion and the second rack portion. 8. The paper guide device according to claim 1.

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