JP2004123317A - Open/closed member locking mechanism, sheet discharge mechanism, sheet treatment device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an open/closed member locking mechanism using hooking members for locking an open/closed member in the open state, wherein the open/closed member can be normally locked even when there is a slight shift between positions of mounting the hooking members. <P>SOLUTION: The hooking members 82, which are supported on a shaft member 81b rockingly in a preset range near a position of engagement with an engaged portion 82 and elastically energized in the direction of engagement with the engaged portion 82, are provided at a plurality of places on the shaft member 81b journaled to the open/closed member turnable relative to a turning shaft 81a. A shaft insertion hole 83a (an oblong hole) through which the shaft member 81b is inserted with a preset play 83b is provided in each of the hooking member 83 to make the shaft member 81b freely rock relative to a supporting shaft 81b. The turning of the hooking members 83 relative to the shaft member 81b is restricted by a stepped pin 85. Furthermore, unlocking handle member is provided which is fixed to the shaft member 81b. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention provides a lock mechanism for an opening / closing member that opens and closes by a rotation operation, a sheet discharge mechanism that includes the lock mechanism, and discharges a conveyed sheet to the outside of the apparatus by a pair of rollers, and a sheet including the sheet discharge mechanism. And a sheet processing apparatus for performing a predetermined process such as a stapling process.
[0002]
[Prior art]
2. Description of the Related Art At present, a sheet processing apparatus (post-processing apparatus of an image forming apparatus) that performs processing such as stapling, punching, and folding (center folding) on a sheet on which an image is formed by an image forming apparatus has become widespread. I have. In general, in such a sheet processing apparatus, a processed sheet conveyed from a previous process by a predetermined sheet conveying means is guided between a pair of adjacently disposed rollers, and is rotated outside the apparatus by rotation of the pair of rollers. (Sheet discharge mechanism).
In such a sheet discharge mechanism, it is necessary to be able to perform a jagging process on a sheet in a conveyance path before and after the roller pair, maintenance of the roller pair, and the like. Therefore, conventionally, a supporting member (roller supporting member) of one of the rollers forming the roller pair is rotatably supported in a direction in which the roller pair is separated from or brought into contact with the roller pair. In some cases, a lock mechanism is provided to allow the roller pair to be in an open state (can be opened) and to lock the roller pair in a state of being close to the roller pair.
FIGS. 5A and 5B schematically show a cross section of a sheet discharging mechanism of a conventional sheet processing apparatus. As shown in FIG. 5, in the conventional sheet discharging mechanism, one roller Ro4a '(upper roller) of a pair of rollers Ro4a, Ro4a' for discharging a sheet is a roller supporting member 81 supported by a rotating shaft 81a. (An example of an opening / closing member). Here, the roller support member 81 is rotatable (openable and closable) in a direction in which the roller pair Ro4a, Ro4a 'is separated from and brought into contact with. FIG. 5A shows a state in which the roller pair Ro4a and Ro4a 'are close to each other, and FIG. 5B shows a state in which the roller pair Ro4a and Ro4a' are separated by the rotation of the roller support member 81. ing. As shown in FIG. 5B, by separating the roller pair Ro4a, Ro4a '(opening the roller support member 81), the roller pair Ro4a, Ro4a' and the sheet conveyance path before and after the roller pair Ro4a, Ro4a 'are opened. As a result, jagging and maintenance are facilitated.
A shaft member 81b extending in a direction perpendicular to the direction of rotation of the roller support member 81 (a direction perpendicular to the plane of FIG. 5) is supported by the roller support member 81. The roller pair Ro4a and Ro4a 'are engaged with a fixed pin member 82 (engaged member) in a state where the roller pair Ro4a and Ro4a' are close to each other near the both ends (FIG. 5 (a)). , Ro4a 'are locked in the proximity state. The hook member 83 is elastically urged by an elastic member 86 such as a spring in a direction in which the hook member 83 is engaged with the pin member 82.
Further, a handle member 84 is fixed to the shaft member 81b so as to protrude in a normal direction thereof. By rotating the handle member 84 in a predetermined direction K1, the shaft member 81b rotates. The hook member 83 fixed to the shaft member 81b rotates (K2 direction), and the hook member 83 is disengaged from the pin member 82.
[0003]
[Problems to be solved by the invention]
However, in the lock mechanism shown in FIG. 5, since the hook member 83 is completely fixed to the shaft member 81b, the hook member 83 is fixed between the one hook member 83 and the other hook member 83 with respect to the shaft member 81b. If the fixed position in the circumferential direction is displaced, or if the position (distance) of the pin member 82 with respect to the hook member 83 is displaced on both end sides of the shaft member 81b, one of the hook members 83 (The one closer to the pin member 82) is normally engaged with the pin member 82, and the other hook member 83 is not normally engaged with the pin member 82 (the hook member 83 is (The pin floats from the pin member 82). The displacement of the positional relationship between the hook member 83 and the pin member 82 may be caused by an error in attaching the hook member 83 or the pin member 82, a twist of the shaft member 81b, or the like.
When the hook member 83 is rotatably supported by the shaft member 81b, the hook member 83 is locked (operation of the pin member 82 of the hook member 83) by operating the handle member 84 provided on the shaft member 81b. ) Cannot be released.
Accordingly, the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a hook member provided at a plurality of positions of a shaft member which is supported by an opening / closing member which opens and closes by a rotation operation. An opening / closing member locking mechanism for locking an opening / closing member in a closed state by the hook member, wherein the opening / closing member can be normally locked even if there is a slight shift in the mounting position between the hook members. An object of the present invention is to provide a mechanism, a sheet discharging mechanism provided with such a lock mechanism, and a sheet processing apparatus provided with the sheet discharging mechanism.
[0004]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a shaft member which is pivotally supported by an opening / closing member which opens and closes by a rotating operation and extends in a direction perpendicular to the rotation direction of the opening / closing member; A plurality of hook members that lock the opening / closing member in the closed state by engaging with a predetermined engaged portion in the closed state of the opening / closing member. An opening / closing mechanism which is swingably supported in a predetermined range near a position where the shaft member is engaged with the engaged portion, and is elastically biased in a direction in which the shaft member is engaged with the engaged portion. It is configured as a lock mechanism for a member.
Thereby, between each of the plurality of hook members, there is a shift in the circumferential fixed position with respect to the shaft member, or there is a shift in the position (distance) of the engaged portion with respect to the hook member. However, if the displacement is within the swing range of the hook member, any of the hook members will normally (without lifting) engage with the engaged portion by the elastic biasing force.
[0005]
Further, if a lock releasing handle member fixed to the shaft member is provided, the shaft member is rotated by operating the lock releasing handle member, so that all of the plurality of hook members are engaged with the engaged portions. Can be collectively released (locked).
It is particularly preferable that the hook member is supported at least near both ends of the shaft member. This is because, as the position of each of the hook members in the axial direction of the shaft member increases, the position of the hook member is more likely to shift due to the twisting of the shaft member or the bending of the device.
[0006]
Further, the present invention may be considered as applying the lock mechanism to a sheet discharging mechanism.
That is, a pair of rollers arranged opposite to each other, a roller supporting member that supports one roller of the pair of rollers, and is configured to be rotatable in a direction to separate and contact the pair of rollers, and to be supported by the roller supporting member. A shaft member extending in a direction perpendicular to the rotation direction of the roller supporting member; and a roller pair provided at a plurality of positions of the shaft member and engaged with a predetermined engaged portion in a state where the roller pair is close to each other. A plurality of hook members for locking the rollers in the proximity state, guiding the conveyed sheet between the roller pairs in the proximity state, and rotating the roller pairs to the outside of the main body device provided with the roller pairs. In the sheet discharging mechanism for discharging a sheet, each of the hook members is swingably supported in a predetermined range near a position where the hook member is engaged with the engaged portion with respect to the roller support member, and the hook member is supported by the engaged portion. Engagement That a sheet discharge mechanism, characterized in that formed by elastically biased in the direction. Here, it is conceivable to provide an unlocking handle member fixed to the shaft member.
Further, the hook member may be supported at least near both ends of the shaft member.
Further, the present invention may be considered as a sheet processing apparatus including the sheet discharging mechanism. That is, a sheet processing apparatus for performing a predetermined process on a sheet on which an image is formed by an image forming apparatus and discharging the sheet out of the apparatus, comprising the sheet discharging mechanism. .
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings to facilitate understanding of the present invention. The following embodiments are examples embodying the present invention, and do not limit the technical scope of the present invention.
Here, FIG. 1 is a schematic sectional view of a sheet processing apparatus X according to an embodiment of the present invention, and FIG. 2 is a front view of a receiving unit of an intermediate processing unit constituting the sheet processing apparatus X according to the embodiment of the present invention. FIG. 3 is a sectional view of an intermediate processing unit constituting the sheet processing apparatus X according to the embodiment of the present invention. FIG. 4 is a hook of a sheet discharging means constituting the sheet processing apparatus X according to the embodiment of the present invention. FIG. 5 is a cross-sectional view schematically illustrating a configuration of a sheet discharging unit of a conventional sheet processing apparatus.
[0008]
The sheet processing apparatus X according to the embodiment of the present invention has a cross section as shown in FIG. 1, and is connected to the image forming apparatus on the right side surface in the drawing. Accordingly, a sheet inlet 11 for receiving an image-formed sheet discharged from the image forming apparatus is provided on the right side of the sheet processing apparatus X as viewed in FIG. Further, a punch means 70 for punching a sheet is provided in the middle of a sheet conveying path r1 provided following the sheet inlet 11, and the sheet is punched according to a predetermined control command from the image forming apparatus. Drilling processing is performed.
The conveyance path r1 is branched into a conveyance path r2 for guiding the sheet upward and a conveyance path r3 for guiding the sheet downward, and which of the conveyance paths is guided by the movable guide g1 which is swingably provided. Is configured to be able to be switched.
The transport path r2 that guides the sheet upward is further connected to a transport path r22 that guides the sheet being transported in a direction along the peripheral surface of the large evacuation drum 21 and then guides the sheet to the transport path r3 that goes downward. .
Then, the sheet conveyed to the conveyance path 22 is temporarily retracted along the peripheral surface of the evacuation drum 21 and then sent out to the conveyance path r3 by the rotation of the evacuation drum 21.
Further, the sheet guided to the conveyance path r3 heading downward is guided to the intermediate processing unit 30 provided below the movable guide g1 (at the center of the sheet processing apparatus).
[0009]
The intermediate processing unit 30 includes an intermediate tray 31 that is provided obliquely, a first sheet end receiving portion 32 that is swingably provided at a predetermined position near the vertical center of the intermediate tray 31, A second sheet end receiving portion 33 movably provided up and down along the tray 31, and first and second staple means 34 provided near the center in the vertical direction of the intermediate tray 31 and performing staple processing on sheets. , 35 are provided. The second sheet end receiving portion 33 is attached to an endless belt 37a, and is configured to move up and down by forward / reverse rotation of the endless belt 37a.
The intermediate processing unit 30 has a receiving side provided with the intermediate tray 31, the first and second sheet end receiving portions 32 and 33, the first and second staple means 34 and 35, and the like. The cover unit 30b is divided into a unit 30a and a cover unit 30b provided with a first staple receiving portion 34 'and the like opposed to the first staple means 34. It is configured to be detachable.
FIG. 3 is a sectional view showing a state in which the cover unit 30b is separated from and approaches the receiving unit 30a. As shown in FIG. 3, the cover unit 30b is rotatably supported by the receiving unit 30a, and the rotation causes the cover unit 30b to approach the receiving unit 30a (see FIG. The position (a)) or the distance (the position (b) in FIG. 3) can be moved. The intermediate processing unit 30 is configured to be able to be pulled out from the main body of the sheet processing apparatus X in the front direction toward FIG. 1. After the intermediate processing unit 30 is pulled out, the cover unit 30 b is connected to the receiving unit. By separating the intermediate processing unit 30 from the intermediate processing unit 30a, it is possible to easily perform a jam clearance operation, a maintenance operation, and the like of the intermediate processing unit 30.
FIG. 2 is a front view of the receiving unit 30a of the intermediate processing unit 30 as viewed from the sheet inlet 11 side.
The first staple means 34 are arranged in pairs at predetermined intervals in the width direction of the sheet (the direction perpendicular to the sheet conveyance direction (vertical direction in FIG. 2)). It is used when performing staple processing at the center in the width direction and staple processing (so-called saddle stitching) at the center in the sheet conveyance direction. The second staple means 35 is disposed obliquely near one end in the width direction of the sheet, and is used for performing staple processing on a corner of the sheet. The first staple receiving portion 34 'is provided on the cover unit 30b at a position facing the first staple means 34.
[0010]
The sheet guided to the conveyance path r3 shown in FIG. 1 is conveyed downward by a conveyance roller Ro1 provided above the intermediate processing unit 30, and falls off the conveyance roller Ro1. One side of the falling sheet (the left side in FIG. 1) is received by the intermediate tray 31, and the leading end (lower end) is the first or second sheet end. It is received by one of the unit receiving portions 32 and 33. As a result, a plurality of sheets are accumulated (stacked) on the intermediate tray 31 and the accumulated sheets are subjected to stapling by the first or second stapling means 34 and 35.
Which of the first and second sheet end receiving portions 32, 33 receives the leading end of the sheet is switched by the swinging operation of the first sheet end receiving portion 32. That is, when the first sheet end receiving portion 32 is at a position along the intermediate tray 31 (a position close to, hereinafter referred to as a use position), the leading end of the sheet is the first sheet end receiving portion. 32, when the first sheet end receiving portion 32 is at a retracted position separated from the intermediate tray 31 by its swinging operation, the leading end of the sheet conveyed by the conveying roller Ro1 is It is configured to be received by the second sheet end receiving portion 33 that has passed the first sheet end receiving portion 32 and has moved below the first sheet end receiving portion 32 and is waiting. . When receiving a small-sized sheet, it is also possible to move the second sheet end receiving portion 33 above the first sheet end receiving portion 32 to receive the sheet. In this case, the first sheet end receiving portion 32 may be at the use position or the retracted position.
For example, when it is desired to perform staple processing (so-called edge binding) at a predetermined position near the end of the sheet, the first or second sheet is loaded in the first sheet end receiving portion 32 while the sheet is stacked. The stapling process is performed by the stapling units 34 and 35. When stapling (so-called saddle stitching) is desired to be performed near the center of the sheet in the sheet conveyance direction, the second sheet end receiving portion 33 is moved to a position corresponding to the sheet size with the sheets stacked. The first stapling means 34 performs stapling. Further, depending on the size of the sheet (a size larger or smaller than a size to be received directly by the first sheet end receiving portion 32), the sheet conveyed by the conveyance roller Ro1 is temporarily transferred to the second sheet. After the sheets are received and stacked by the end receiving portion 33, the first sheet end receiving portion 33 is also reloaded. In this case, first, the conveyed sheet is moved to a position corresponding to the size of the sheet (below or above the position of the first sheet end receiving portion 33). After moving the second sheet end receiving portion 33 loaded with sheets by the sheet receiving portion 33 to a position slightly above the first sheet end receiving portion 32 (for example, about 2 mm above). (During this time, the first sheet end receiving portion 32 is at the retracted position), the first sheet end receiving portion 32 is swung to the use position, and further the second sheet end receiving portion 32 is swung. By moving the section 33 below the first sheet end receiving section 32, the sheets stacked on the second sheet end receiving section 33 are transferred to the first sheet end receiving section 32. Transship. Here, the first sheet end receiving portion 32 is suitable for directly receiving a sheet (for example, A4Y / LTY size) of a size frequently used in the sheet processing apparatus X when the sheet is conveyed. When a sheet of a larger size is conveyed and the staple processing is to be performed while the sheets are stacked on the first sheet end receiving portion 32 ( That is, when edge binding is desired), the above-described reloading is performed. Thus, for a sheet of a frequently used size, the sheet can be directly received by the first sheet end receiving portion 32, so that it is necessary to perform positioning by moving the second sheet end receiving portion 33. And staple processing can be performed quickly. Further, when staple processing (edge binding) is performed at a predetermined position near the edge of the sheet, high accuracy is required at the position where the staple processing is performed, and positioning by moving the second sheet end receiving portion 33 is not sufficient. Although it may be difficult to ensure accurate positioning accuracy, even in such a case, the position of the first sheet end receiving portion 32 that does not move and the position of the first and second staples 34 and 35 that do not move are determined. Since the relationship can be set with high accuracy in advance, the stapling process can be performed with sufficient positional accuracy.
[0011]
The sheet (sheet bundle) on which the staple processing has been performed in the intermediate processing unit 30 is provided from the inside of the intermediate processing unit 30 to the lower side when further folding in two (hereinafter, referred to as center folding processing) is performed. The sheet is sent to the conveyance path r5 in the center folding unit 40, and is sent to the upper conveyance path r4 when the center folding process is not performed.
The sheet is sent out to the conveyance path r5 by a conveyance roller Ro2 that is swingably supported below the intermediate processing unit 30. Usually, the transport roller Ro2 is retracted to a position separated from a driven roller Ro2 ′ arranged to face the transport roller Ro2, and when the sheet is sent to the transport path r5, the driven roller Ro2 ′ is used. , The sheet is sandwiched between the driven roller Ro2 ′ and the sheet is sent out (conveyed) to the conveying path r5 by the rotational force of the conveying roller Ro2.
The sheet (sheet bundle) guided to the conveyance path r5 in the center folding unit 40 is further conveyed by the conveyance roller Ro3 in the center folding unit 40 and stopped at a predetermined position. The pressing die 41 is pressed against the center of the sheet in the conveying direction, and the sheet is folded in two between the two center folding rollers 42 that are arranged opposite to the pressing surface of the pressing die 41 and are opposed to each other. While being sandwiched. The two center folding rollers 42 are urged in directions facing each other, and the sheet is folded by this urging force. The sheet that has been subjected to the half-folding process in this manner is conveyed in a direction in which the folded portion becomes the top by the rotational force of the center-folding roller 42, passes through the conveyance path r6 above the center-folding roller 42, By a discharge roller Ro4 in the center folding unit 40, the sheet is discharged from a lower sheet outlet 14 provided on the side surface opposite to the sheet inlet 11 onto a center folded sheet discharge tray 60 provided outside the sheet outlet tray. At this time, the center-folded sheet is suppressed and aligned by the sheet holding member 61 rotatably provided above the lower sheet outlet 14.
[0012]
On the other hand, the sheet is sent to the transport path r4 above the intermediate processing unit 30 by a sheet sending member 36 having a T-shaped cross section, which is provided to be vertically movable along the intermediate tray 31. The sheet feeding member 36 is attached to the endless belt 37b, is configured to move up and down by forward / reverse rotation of the endless belt 37b, and is retracted to the back side (lower side) of the intermediate tray 31. It is also possible. The vertical movement ranges of the sheet feed member 36 and the second sheet end receiving portion 33 partially overlap, and the position where the sheet feed member 36 is moved to the lowermost end is The second sheet end receiving portion 33 is configured to be lower than a position where the second sheet end receiving portion 33 is moved to the uppermost end.
The sheet is sent to the upper conveying path 4 by the sheet feeding member 36 configured as described above as follows.
First, with the sheet feed member 36 retracted to the back side, the second sheet end receiving portion 33 on which sheets are stacked is moved to the uppermost end. Next, the second sheet end receiving portion 33 is moved by moving the sheet feeding member 36 from the lowermost end to the front side, and further moving the sheet feeding member 36 upward from the second sheet end receiving portion 33. Are stacked on the sheet sending member 36. Then, by further moving the sheet sending member 36 upward, the restacked sheets are sent out to the transport path r4.
The sheet (sheet bundle) conveyed to the conveyance path r4 in this manner is taken over by the sheet discharge means 80, and is driven by the rotational force of the discharge roller Ro6 provided in the sheet discharge means 80, so that the middle sheet exit 13 Is discharged to any one of a plurality of movable trays 50 provided on the outside thereof. The movable trays 50 are provided to be inclined so as to face upward in the sheet discharging direction. Further, the movable tray 50 is configured to be movable in the vertical direction, and which movable tray 50 receives the sheet discharged from the middle-stage sheet outlet 13 is switched depending on the stop position.
[0013]
Next, the sheet discharging means 80 (sheet discharging mechanism) and its locking mechanism in the sheet processing apparatus X according to the embodiment of the present invention will be described.
The overall configuration of the sheet discharging means 80 is the same as that of the conventional sheet discharging mechanism shown in FIG. 5, except for the structure of attaching the hook member 83 to the shaft member 81b. Therefore, the rotation of each component and the roller support member 43 in the sheet discharging means 80 (sheet discharging mechanism) according to the embodiment of the present invention is the same as that of the conventional sheet discharging mechanism shown in FIG. The description is omitted here. Also, the numbers of the components are the same as those of the above-described conventional sheet discharge mechanism (FIG. 5). Hereinafter, the mounting structure of the hook member 83 to the shaft member 81b will be described with reference to FIG.
FIG. 4A is a side sectional view showing a state where the hook member 83 constituting the sheet discharging means 80 is attached to the shaft member 81b, and FIG. 4B is a plan view thereof. Although the roller support member 81 is not shown in FIG. 4A, the rotation axis of the roller support member 81 and the rotation radius of the shaft member 81b with respect to the rotation shaft 81a are indicated by an arrow line 81r. Indicated by.
As shown in FIG. 4, the hook member 83 is provided with a shaft insertion hole 83a through which the shaft member 81b is inserted, and the hook member 83 is inserted through the shaft insertion hole 83a. The member 83 is rotatably supported by the shaft member 81b. Here, the shaft insertion hole 83a is a long hole that is longer in the predetermined direction than the outer diameter of the shaft member 81b, and is provided so as to have a play (gap) 83bs in a predetermined range. By providing the play 83bs, the hook member 83 is provided near the position where the hook member 83 is engaged with the pin member 82 with the shaft member 81b inserted through the shaft insertion hole 83a. It is swingable (slidable) in the direction of the play 83bs in the direction of coming and going.
Further, a step pin 85 which is a bolt member (threaded rod-shaped member) having two-step outer diameter flange portions 85a and 85b is attached to the hook member 83 in a direction perpendicular to the axial direction of the shaft member 81b. Is provided with a pin insertion hole 83b through which the pin is inserted.
On the other hand, the step member 85 is attached to the shaft member 81b in a direction perpendicular to the axial direction.
Is provided with a threaded hole 81bo into which is screwed.
Thus, in a state where the hook member 83 is inserted through the shaft insertion hole 83a of the shaft member 81b, the step pin 85 is inserted into the pin insertion hole 83b of the hook member 83, and the shaft member 81b is By screwing into the threaded hole 81bo, the rotation (relative rotation) of the hook member 83 with respect to the shaft member 81b is regulated (fixed) by the step pin 85. Therefore, when the shaft member 81b is rotated, the hook member 83 is rotated according to the rotation.
Further, the hook member 83 is elastically urged by the elastic member 86 such as a spring in a direction in which the hook member 83 is engaged with the pin member 82 as described above.
Here, by forming the length of the flange portion 85b inside the step pin 85 to an appropriate length, even when the step pin 85 is screwed to the shaft member 81b as far as the end, the inside of the step pin 85 can be formed. The flange portion 85b serves as a spacer, and the outer flange portion 85a having an outer diameter larger than the pin insertion hole 83b presses the hook member 83 to fix the hook member 83 to the shaft member 81b. It does not make it impossible to swing. This eliminates the need for fine adjustment of the screw-in depth of the step pin 85 during assembly.
The hook member 83 is attached to both ends of the shaft member 81b (in the width direction of the sheet discharging means 80 (the direction perpendicular to the sheet discharging direction, the depth direction with respect to the paper surface of FIG. 4A) by the mounting structure shown in FIG. ) Near each end). Of course, the hook member 83 may be attached to three or more locations in the axial direction of the shaft member 81b. The handle member 84 is fixed near the axial center of the shaft member 81b so as to protrude in the normal direction as described above. Thus, by operating (rotating) the handle member 84, the shaft member 81b is rotated, and by the rotation, all the hook members 83 can be unlocked.
With such a configuration, between the hook members 83 provided near both ends of the shaft member 81b, there is a shift in the circumferential fixed position with respect to the shaft member 81b, Even if there is a deviation in the position (distance) of the pin member 82, if the deviation is within the range of the play 83 bs, any of the hook members 83 is biased by the elastic member 86 to cause the pin member 82 to move. Normally (without lifting).
Further, since the rotation of the hook member 83 with respect to the shaft member 81b is restricted, the handle member 84 (see FIG. 5) fixed to the shaft member 81b is operated to be rotated (lifted). The hook member 83 also rotates, and the hook member 83 can be disengaged from the pin member 82 (unlocked).
[0014]
【The invention's effect】
As described above, according to the present invention, a hook member is provided at a plurality of positions on a shaft member which is pivotally supported by an opening / closing member that opens and closes by a rotation operation, and the opening / closing member is closed by the hook member. In the locking mechanism of the opening / closing member to be locked, the hook member is supported swingably within a predetermined range and is elastically biased in the locking direction. However, it is possible to normally (reliably) lock the opening / closing member.
[Brief description of the drawings]
FIG. 1 is a schematic sectional view of a sheet processing apparatus X according to an embodiment of the present invention.
FIG. 2 is a front view of a receiving unit of an intermediate processing unit included in the sheet processing apparatus X according to the embodiment of the present invention.
FIG. 3 is a sectional view of an intermediate processing unit included in the sheet processing apparatus X according to the embodiment of the present invention.
FIG. 4 is a diagram illustrating a mounting structure of a hook member in a sheet discharging unit included in the sheet processing apparatus X according to the embodiment of the present invention.
FIG. 5 is a cross-sectional view schematically illustrating a configuration of a sheet discharging unit of a conventional sheet processing apparatus.
[Explanation of symbols]
11 Sheet inlet 13 Middle sheet outlet 14 Lower sheet outlet 21 Retreat drum 30 Intermediate processing unit 31 Intermediate tray 32 First sheet end receiving part 33 Second sheet end receiving parts 34 and 35 ... Staple means 34 ', 35' ... Staple receiving part 36 ... Sheet sending members 37a, 37b ... Endless belt 40 ... Center folding unit 41 ... Pressing mold 42 ... Center folding roller 50 ... Movable tray 60 ... Center folding sheet discharge tray 61 ... Sheet holding member 80 ... Sheet discharging means 81 ... Roller support member 81b ... Shaft member 82 ... Pin member (engaged part)
83 hook member 84 handle member 85 step pin 86 elastic member (spring)
f1, f2, f3 ... film member (elastic film member)
Ro1, Ro2, Ro3: transport rollers Ro4, Ro6: discharge rollers r1, r2, r22, r3, r4, r5, r6: sheet transport path

Claims (7)

A shaft member pivotally supported by an opening / closing member that opens and closes by a pivoting operation and extending in a direction perpendicular to the rotation direction of the opening / closing member; And a plurality of hook members that lock the open / close member in a closed state by engaging with a portion.
Each of the hook members is swingably supported in a predetermined range near a position where the hook member is engaged with the engaged portion, and is elastically urged in a direction of engaging with the engaged portion. A lock mechanism for an opening / closing member. The locking mechanism for an opening / closing member according to claim 1, further comprising a lock releasing handle member fixed to the shaft member. 3. The locking mechanism for an opening / closing member according to claim 1, wherein the hook member is supported at least near both ends of the shaft member. A pair of rollers arranged opposite to each other;
A roller support member configured to support one roller of the roller pair and to be rotatable in a direction to separate and contact the roller pair;
A shaft member pivotally supported by the roller support member and extending in a direction perpendicular to the rotation direction of the roller support member;
A plurality of hook members provided at a plurality of locations on the shaft member to lock the roller pair in a close state by engaging with a predetermined engaged portion when the roller pair is in a close state, A sheet discharging mechanism that guides an incoming sheet between the pair of rollers in the proximity state and discharges the sheet to the outside of a main body device provided with the roller pair by rotation of the roller pair;
Each of the hook members is swingably supported within a predetermined range near a position where the hook member engages with the engaged portion with respect to the roller support member, and is elastically urged in a direction of engaging with the engaged portion. A sheet discharging mechanism characterized by: The sheet discharging mechanism according to claim 4, further comprising a lock releasing handle member fixed to the shaft member. The sheet discharging mechanism according to claim 4, wherein the hook member is supported at least near both ends of the shaft member. In a sheet processing apparatus that performs a predetermined process on a sheet on which an image is formed by an image forming apparatus and discharges the sheet out of the apparatus,
A sheet processing apparatus comprising the sheet discharging mechanism according to claim 4.

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