CN111381473A

CN111381473A - Original manuscript pressing plate opening and closing device and office machine comprising same

Info

Publication number: CN111381473A
Application number: CN201911373367.7A
Authority: CN
Inventors: 仓持龙太
Original assignee: Kato Electric Hong Kong Co ltd
Current assignee: Kato Electric Hong Kong Co ltd
Priority date: 2018-12-28
Filing date: 2019-12-27
Publication date: 2020-07-07
Anticipated expiration: 2039-12-27
Also published as: JP2020106742A; TW202026747A; JP7223400B2; CN111381473B; TWI720759B

Abstract

Provided is an original manuscript pressing plate opening and closing device and an office machine comprising the same, which can prevent fingers from being injured due to clamping in a space part generated between a lifting member and a supporting member. The original cover closer 1 includes: a mounting member 4 mounted on the apparatus body 2 side of the office machine having the original cover 3; a support member 5 pivotally supported on the mounting member 4 via a first hinge shaft 11; and a lifting member 6 overlapping the supporting member 5, pivotally supported at a free end side of the supporting member 5 via a second hinge shaft 12 in a direction opposite to the supporting member 5, and attached to the original cover 3, wherein a hand pinching prevention mechanism 7 is provided between the lifting member 6 and the supporting member 5 or the attachment member 4 or the first hinge shaft 11 in order to block a space portion formed between the lifting member 6 and the supporting member 5 when the lifting member 6 is rotated in the direction opposite to the supporting member 5.

Description

Original manuscript pressing plate opening and closing device and office machine comprising same

Technical Field

The present invention relates to an original cover folding device included in office machines such as a photocopier, a multifunction machine, a printer, a facsimile machine, and a scanner, and an office machine including the original cover folding device.

Background

A device body of office machines such as a photocopier, a printer, a facsimile machine, and a scanner, wherein an original cover is rotatably mounted to a rear portion of an upper surface of the device body via an original cover opening/closing device. The original cover plate opening and closing device is a hinge mechanism for pivotally supporting an original cover plate around a hinge shaft so that the original cover plate can be brought into close contact with a contact glass surface on the upper surface of a device body and the contact glass can be exposed. When an original is placed on the contact glass surface, the original pressing plate is rotated (opened and closed in the vertical direction) to expose (open) the contact glass surface, and after the original is placed on the contact glass surface, the original pressing plate is closed and the original is pressed against the contact glass surface, whereby the original can be placed on the contact glass surface.

As described in japanese unexamined patent publication No. 11-95339, there is known a document platen opening and closing device which is provided with a lifting/lowering member and a compression coil spring, and which can rotate a document platen without feeling the original weight by the urging force of the compression coil spring, regardless of the thickness of the document platen so that the document can be brought into close contact with a contact glass.

An original cover folding device disclosed in japanese unexamined patent publication No. h 11-95339 includes: a mounting member mounted to a device body of the office machine; a support member pivotally supported at the mounting member rotatably via a first hinge shaft; a lifting member overlapped with the supporting member, rotatably and pivotally supported at a free end of the supporting member via a second hinge shaft, and mounted on the manuscript pressing plate; and a compression coil spring provided between the lifting member and the mounting member and urging the lifting member in a direction overlapping the support member.

Therefore, in the case of copying a thick original like a book, when the thick original is placed on the contact glass and the original cover is rotated in the closing direction, the original cover is brought into contact with the end of the original cover closer to the opening/closing device, and when the original cover is pressed downward, the lifting member is reversed relative to the support member about the second hinge shaft as a fulcrum, the original cover is horizontally placed on the contact glass, the thick original is pressed against the contact glass, and the external light is prevented from entering and exiting the interior of the office machine through the contact glass.

As shown in fig. 17, a space is formed between the rear portion of the elevating member and the rear portion of the supporting member. The original cover closer is configured such that when a thick original on the contact glass is taken away and opened once in the opening direction, the lifting member and the support member are overlapped and returned to the original position, but when the original cover is closed in a state where the lifting member is reversed, the original cover, that is, the lifting member is closed in a state where it is not returned to the original position and the front end side of the original cover is lowered, and is closed in a state where a space is formed between the rear portion of the lifting member and the rear portion of the support member. Even in this case, the lifting member and the support member can be overlapped and returned to the original position by opening the original cover plate once in the opening direction. However, the operator may not perform this operation because of unknown or misunderstanding of the apparatus, and may push down the portion of the handle placed on the elevation member by extending the hand to the rear end portion of the original cover.

As a result, the fingers are caught in the space between the lifting means and the supporting means, and the fingers are injured.

Disclosure of Invention

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an original cover closer capable of preventing the above-mentioned accident in the above-mentioned known original cover closer, and an office machine including the original cover closer.

To achieve the above object, an original cover closer according to the present invention includes: a mounting member mounted on a device body side of an office machine having a manuscript pressing plate; a support member pivotally supported at the mounting member rotatably via a first hinge shaft; and a lifting member which is overlapped with the supporting member, is pivotally supported on the free end side of the supporting member in a direction opposite to the supporting member through a second hinge shaft, and is installed on the manuscript pressing plate; the opening and closing device for manuscript pressing plate includes anti-pinch mechanism set between the lifting member and the support member or the installation member or the first hinge shaft to block the space between the lifting member and the support member when the lifting member rotates in the direction opposite to the support member.

Next, the anti-pinch mechanism of the present invention comprises: the bamboo curtain-shaped hand clamping preventing part is formed to be bent in a single direction; and a first installation part which is connected with the upper end part of the hand clamping prevention part and is installed on the lifting component.

Then, the anti-pinch part of the anti-pinch mechanism of the invention comprises: a plurality of plate portions in the form of a paper strip; and a connecting portion that bendably connects the plurality of plate portions to each other.

Then, the invention sets anti-bending protuberance between the plurality of plate parts of the anti-clamping part of the anti-clamping mechanism, and limits the bending direction of the plurality of plate parts to be one direction.

Next, the anti-pinch mechanism of the present invention comprises: the second connecting part connects the hand-clamping prevention part and the first mounting part.

Next, the anti-pinch mechanism of the present invention comprises: and a second mounting part mounted on the supporting member or the mounting member or the first hinge shaft at the other end of the continuing anti-pinch hand part.

Next, the anti-pinch mechanism of the present invention comprises: the third connecting part connects the hand-clamping prevention part and the second mounting part.

Next, the thickness of the connecting portion of the present invention is changed to control the flexibility of the plurality of plate portions.

Next, the hand pinching prevention mechanism of the present invention is constituted by a plate member in a flat plate shape, and is configured such that the plate member is rotatable toward the rear end portion side of the lifting member via the rocking support portion.

Next, the plate member of the present invention is constituted by a plurality of wide plate portions formed to have a width larger than that of the plate portion, and is configured to be foldable in one direction by the connecting portion.

Next, the end of the plate member of the present invention is rotatably attached to the rear end of the elevating member via the pivot support portion, and the rotation of the plate member with the attachment member toward the space portion is restricted.

Next, an office machine according to the present invention uses the original cover folding device.

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a highly safe original cover closer which can prevent a user's fingers from being caught in a space portion formed in each rear portion of a lifting member and a supporting member and being injured, while obtaining the above-mentioned operational effect by horizontally covering and pressing a thick original cover, such as a book, on a contact glass with the original cover, and preventing external light from entering the inside of a main body of the closer as much as possible.

According to the present invention, the hand pinching prevention portion can be prevented from being bent inward, the hand pinching prevention portion can be prevented from entering between the upper plate of the support member and the upper plate of the lifting member, and the fingers of a person can be prevented from entering into the space portion formed between the lifting member and each rear portion of the support member and being pinched.

According to the present invention, the hand pinching prevention portion can be formed in a state where the plurality of plate portions are connected to each other, and the plate portions can be connected to each other in a bendable manner.

According to the present invention, the hand pinching prevention part can be prevented from being pushed into the space part.

According to the invention, the hand clamping prevention part can rotate relative to the first installation part.

According to the present invention, the hand pinching prevention portion can be more surely prevented from being pushed into the space portion.

According to the invention, the hand clamping prevention part can rotate relative to the second installation part.

According to the present invention, the flexibility of the plurality of plate portions can be controlled, and the shape of the hand pinching prevention portion when the distance between the first mounting portion and the second mounting portion changes due to the rotation of the lifting member can be adjusted.

According to the present invention, it is possible to prevent a human finger or the like from entering and being caught in a space portion formed in each rear portion of the vertically movable member and the support member formed at the time of starting the vertical movement.

According to the present invention, the plate member can be bent.

According to the present invention, an office machine using the original cover closer can be provided.

Drawings

Fig. 1 is a side view showing an example of the original cover folding device according to the present invention.

Fig. 2 is a rear view showing an example of the original cover folding device according to the present invention.

Fig. 3 is a diagram showing an example of the finger pinch preventing mechanism of the original cover closer according to the present invention, wherein (a) is a perspective view, and (b) is a side view and a partial enlarged view thereof.

Fig. 4 is a side view showing the operation of the finger pinch preventing mechanism when the elevation member of the original cover closer according to the present invention is reversed with respect to the support member.

Fig. 5 is a rear view showing the original cover closer shown in fig. 4.

Fig. 6 is a side view showing a fully opened state of the original cover closer according to the present invention.

Fig. 7 is a view illustrating a state in which the hand pinching prevention mechanism of the original cover closer of the present invention is slightly bent without being bent inward, and the hand pinching prevention mechanism is slightly bent inward, and a partially enlarged view thereof.

Fig. 8 is a side view showing another embodiment of the original cover closer according to the present invention.

Fig. 9 is a side view showing still another embodiment of the original cover closer according to the present invention.

Fig. 10 is a rear view of the original cover closer shown in fig. 9.

Fig. 11 is an enlarged exploded perspective view of the finger pinch prevention mechanism of the original cover closer shown in fig. 9.

Fig. 12 is a side view for explaining an operation of the finger pinching prevention mechanism of the original cover closer shown in fig. 9.

Fig. 13 is a rear view of the original cover closer shown in fig. 12.

Fig. 14 is a side view showing a fully opened state of the original cover closer shown in fig. 9.

Fig. 15 is a partially enlarged sectional view of a connecting portion between a plate member and a swing support of the finger pinching prevention mechanism of the original cover closer shown in fig. 9, where (a) is a portion viewed from a in fig. 12, and (B) is a portion viewed from B in fig. 14.

Fig. 16 is a side view showing still another embodiment of the original cover closer according to the present invention.

Fig. 17 is a side view of a known original cover closer.

Detailed Description

Hereinafter, an embodiment of an original cover closer according to the present invention and an office machine using the original cover closer will be described in detail with reference to the drawings.

The first embodiment. Fig. 1 to 7 are diagrams showing examples of an original cover closer according to a first embodiment of the present invention and an office machine using the original cover closer. An original cover closer 1 of the present invention is a hinge device, and an original cover 3 is openably mounted on an upper surface of a device body 2 of an office machine such as a photocopier, a printer, a facsimile machine, and a scanner.

As shown in the drawing, the original cover folding device 1 of the present invention includes: a mounting member 4 mounted on the apparatus body 2; a support member 5 rotatably coupled to the two

side plates

42, 42 of the mounting member 4 via a first hinge shaft 11; and a lifting member 6 mounted on the original cover 3 in a state rotatably connected to the two

side plates

52, 52 of the support member 5 via a second hinge shaft 12; wherein the supporting member 5 is rotated from a closed position where the original cover plate 3 contacts on the apparatus body 2 to a maximum use open position at the time of ordinary use, and the supporting member 5 is further rotated from the maximum use open position to the maximum open position at the time of maintenance. The original cover closer 1 of the present invention is characterized in that a finger-pinch preventing mechanism 7 is provided to prevent a finger from entering a space R formed when a lifting member 6 rotates around a second hinge shaft 12 inserted through a support member 5. Further, although one first hinge shaft 11 and one second hinge shaft 12 are illustrated in the drawings, the first hinge shaft and the second hinge shaft may be divided into two sections, which are respectively pivotally supported by the two

side plates

42 and 42 of the mount member 4 and the two

side plates

52 and 52 of the support member 5, and the two

side plates

52 and 52 of the support member 5 and the two

side plates

62 and 62 of the elevation member 6. The first and second hinge axes 11 and 12 include those described above in the present invention.

The mounting member 4, as shown in fig. 1, is composed of: a bottom plate 41 mounted on the upper end side of the rear part of the apparatus body 2; two

side plates

42, 42 extending from both side ends of the bottom plate 41 in a direction perpendicular to the bottom plate 41 (including a substantially perpendicular direction); and a substantially rectangular attachment piece 43 extending from one end (rear end) of the base plate 41 in a direction perpendicular to the base plate 41 (including a substantially perpendicular direction).

The bottom plate 41 is formed in a substantially rectangular shape, and the bottom plate 41 is provided with mounting holes (not shown) for mounting the bottom plate 41 to the apparatus body 2 with screws, bolts, or the like. The two

side plates

42, 42 are formed in a substantially L-shaped cross section, and the first hinge shaft hole 46 is provided at a front end portion (upper portion) of the attachment piece 42a, and the attachment piece 42a extends in a direction perpendicular to the bottom plate 41 (including a substantially perpendicular direction). The pressure receiving member hole 47 is provided on the side (lower side) of the bottom plate 41 and on the inner side (front side) of the first hinge shaft hole 46 of the attachment piece 42 a. The pressure receiving member 13 is inserted into the pressure receiving member hole 47 penetrating the two attachment pieces 42 a. Further, the pressure receiving member 13 may not be pin-shaped, and a curved member or a resin product may be attached between the two

side plates

42, 42.

The support member 5 is constituted by: an upper plate 51; two

side plates

52, 52 extending from an end of the upper plate 51 in a direction perpendicular to the upper plate 51 (including a substantially perpendicular direction), so that the two

side plates

52, 52 cover the two

side plates

42, 42 of the mounting member 4 from both side ends along the sliding direction of the pair of

sliders

31, 32 described later, respectively; and holding

pieces

54, 54 formed by bending the front end portions of the two

side plates

52, 52 at 90 degrees to the opposite sides, and further, blocking

pieces

55, 55 are provided on the support member 5 from the two

side plates

52, 52 upward. When the second attachment portion 72 is attached to the lower surface side of the upper plate 61 of the vertically movable member 6, the

stoppers

55 and 55 may be omitted.

One end (front end) of each of the

side plates

52, 52 is provided with a second hinge shaft hole (not shown) through which the second hinge shaft 12 is inserted, and also with cutout portions 56, 56 (the other is not shown) into which the operating member 14 described later is inserted. A first hinge shaft insertion hole (not shown) is provided at the other end (rear end) of the

side plates

52, 52. The first hinge shaft insertion holes of the two

side plates

52, 52 and the first hinge shaft hole 46 of the mounting member 4 are aligned and the first hinge shaft 11 is inserted through these holes, whereby the support member 5 is rotatably coupled to the mounting member 4 about the first hinge shaft 11.

The pair of

sliders

31 and 32 are fitted in the support member 5. The pair of

sliders

31 and 32 have

closing surfaces

31a and 32a as bottom surfaces, and are formed in a bottomed cylindrical shape having a rectangular cross section. The pair of

sliders

31 and 32 are slidably fitted in the support member 5 so that the openings thereof face each other, and the compression coil spring 21 is elastically provided in the pair of

sliders

31 and 32. In other words, the concave inner portions of the

sliders

31 and 32 are formed as

spring receiving portions

31c and 32c that receive the compression coil spring 21. The compression coil spring 21 may be one or more than two, for example, two parallel or overlapped, and pushes the pair of

sliders

31 and 32 in a direction away from each other.

The pair of

sliders

31 and 32 are formed to have a length to fit into the support member 5 when the bottom plate 41 of the mounting member 4 and the support member 5 (upper plate 51) are substantially parallel to each other (for example, when the original cover closer 1 of the present invention is mounted on a photocopier or the like, when the original cover 3 is in close contact with the contact glass surface on the upper surface of the apparatus main body 2 (when the original cover is in close contact with each other)).

The slider (first slider) 31 on the tip end side has a closed surface 31a on the bottom surface, and the outer surface is formed as a flat surface. The closing surface 31a presses the moving member 14 by the urging force of the compression coil spring 21, and the support member 5 and the elevation member 6 overlap. In this case, the support member 6 is connected to the support member 5 by the second hinge shaft 12, moved upward than the known one, and the lower surface side of the upper plate 61 of the vertically movable member 6 abuts on the

stoppers

55, 55 provided to protrude upward from the two

side plates

52, 52 of the support member 5, and the upper plate 51 of the support member 5 and the upper plate 61 of the vertically movable member 6 are brought into contact with the second mounting portion 72 on the rear end side of the upper plate 61 with a gap therebetween, and the vertically movable member 6 is not tilted with respect to the support member 5.

The lifting member 6 is composed of: an upper plate 61 attached to the rear end side of the original cover 3 with screws or the like; and two

side plates

62, 62 extending from both side portions of the upper plate 61 in a direction perpendicular to the upper plate 61 (including a substantially perpendicular direction), respectively, wherein the mounting piece 63 is formed to be bent at 90 degrees from one end portion (rear end portion) of the upper plate 61 to the opposite side to the two

side plates

62, 62. A second hinge shaft insertion hole (not shown) is provided on the front end side of the two

side plates

62, 62 of the elevation member 6, and an operating member hole (not shown) through which the operating member 14 is inserted is provided below the second hinge shaft insertion hole. The operating member 14 is inserted through and fixed to the operating member holes of the two

side plates

62, 62. The second hinge shaft insertion holes of the two

side plates

62, 62 of the elevation member 6 and the second hinge shaft holes of the two

side plates

52, 52 of the support member 5 are aligned and the second hinge shaft 12 is inserted through these holes, whereby the elevation member 6 and the support member 5 are rotatably coupled to each other about the second hinge shaft 12. Further, although the operating member 14 is illustrated as a single pin or shaft, other operating members or operating members integrally or separately protruding from the distal end side of the elevating member 6 may be used. The operating member 14 also includes the above.

As shown in fig. 3, the anti-pinch mechanism 7 of the first embodiment, which is provided between the rear end portion of the support member 5 and the rear end portion of the lifting member 6, is formed by: a bamboo-curtain-like anti-pinch hand 73; a first mounting part 71 mounted on the rear end of the lifting member 6 connected to the upper end of the hand clamping prevention part 73; and a second mounting part 72 mounted on the rear end of the support member 5 connected to the lower end of the anti-pinch part 73, wherein the anti-pinch part 73, the first mounting part 71, and the second mounting part 72 are integrally formed of thermoplastic resin and bent in one direction. The anti-pinch hand 73 is composed of the following components: a plurality of

plate portions

73a, 73a … in the form of a strip of long paper; a first connecting portion 73e connecting the

adjacent plate portions

73a and 73a …; and

anti-bending protrusions

73d, 73d … formed at both ends of the

plate portions

73a, 73a …, and having a Contraband-shaped front view.

The first connecting portion 73e, the second connecting portion 74, and the third connecting portion 75 are formed thin enough to have flexibility. Therefore, the hand pinching prevention portion 73 can be bent and the first coupling portion 73e does not enter the space portion R, and can correspond to a distance change between the first mounting portion 71 and the second mounting portion 72 due to the rotation of the elevating member 6 (see fig. 1 and 4).

A small gap 76 is formed between the

plate portions

73a and 73a …, the

plate portions

73a and 73a … have the same width as the bending

prevention projections

73d and 73d …, and the bending

prevention projections

73d and 73d … are located at both ends of the

surfaces

73c and 73c … and the

surfaces

73b and 73b … on the opposite side and have a Contraband-shaped front view. Thus, even if the user pushes the hand pinching prevention section 73 into the space R, the hand pinching prevention section 73 can be prevented from being pushed into the space R by the anti-bending projections 73d abutting against each other.

Further, the uppermost plate portion 73a of the pinching prevention hand portion 73 is connected to the first mounting portion 71 by the second connecting portion 74. The first mounting portion 71 is formed by: a fixed plate 71a extending horizontally from the front end side to the rear end side of the vertically movable member 6 and having a mounting hole 71f formed therein for mounting to the upper plate 61 of the vertically movable member 6 with a screw or the like; a front plate 71b extending from the front end of the fixed plate 71a in a direction perpendicular to the fixed plate 71a (including a substantially perpendicular direction); a top plate 71c extending from the front end of the front plate 71b in a direction perpendicular to the front plate 71b (including a substantially perpendicular direction) and in a direction away from the fixed plate 71 a; and a mounting piece 71d extending from the front end of the top plate 71c in a direction perpendicular to the top plate 71c (including a substantially perpendicular direction) and opposite to the front plate 71 b. The front plate 71b, the top plate 71c, and the mounting piece 71d are formed to have substantially the same width as the upper plate 61 of the vertically movable member 6, and a first mounting groove 71g into which the mounting piece 63 of the vertically movable member 6 is inserted is formed by these. The first attachment portion 71 is configured such that the attachment piece 63 is inserted into the first attachment groove 71g in a state where the fixed plate 71a is disposed on the rear end side of the vertically movable member 6 (upper plate 61) with respect to the front plate 71 b.

The mounting piece 71d is coupled to the plate portion 73a at the tip end thereof by the second coupling portion 74. Specifically, the outer edge 71e and the plate portion 73a are coupled by the second coupling portion 74, and the outer edge 71e is an edge portion opposite to the inner edge of the first mounting groove 71g forming the tip of the mounting piece 71 d. Thus, the pivoting angle of the plate portion 73a of the connection mounting piece 71d can be increased, and when the first mounting portion 71 and the second mounting portion 72 are brought close to each other by the pivoting of the vertically movable member 6, the plate portion 73a can be pivoted to the opposite side (upper side) to the second mounting portion 72, and when the first mounting portion 71 and the second mounting portion 72 are separated from each other, the plate portion 73a can be pivoted to the side (lower side) of the second mounting portion 72. The side surfaces of the mounting piece 71d and the plate portion 73a may be coupled by the second coupling portion 74, and preferably, the edge of the surface 73c of the plate portion 73a may be coupled. Thus, when the user pushes the pinching prevention hand 73 into the space portion R side, the burden imposed on the second connection portion 74 can be reduced. In order to increase the fatigue limit, the second coupling portion 74 may be formed such that the distance between the attachment piece 71d and the plate portion 73a is longer than the distance between the plate portions 73 a.

The lowermost plate portion 73a and the second attachment portion 72 are coupled by a third coupling portion 75. The second mounting portion 72 is formed of, like the first mounting portion 71: a fixing plate 72a extending horizontally from the front end side to the rear end side of the support member 5 and having a mounting hole 72f formed therein for mounting to the upper plate 51 of the support member 5 with a screw or the like; a front plate 72b extending from a front end of the fixed plate 72a in a direction perpendicular to the fixed plate 72a (including a substantially perpendicular direction); a top plate 72c extending from the front end of the front plate 72b in a direction perpendicular to the front plate 72b (including a substantially perpendicular direction) and in a direction away from the fixed plate 72 a; and a mounting piece 72d extending from the front end of the top plate 72c in a direction perpendicular to the top plate 72c (including a substantially perpendicular direction) and opposite to the front plate 72 b. The front plate 72b, the top plate 72c, and the mounting piece 72d form a second mounting groove 72g into which the mounting piece 53 of the support member 5 is inserted. In the second attachment portion 72, the attachment piece 53 is inserted into the second attachment groove 72g in a state where the fixed plate 72a is disposed on the rear end side of the support member 5 (upper plate 51) with respect to the front plate 72 b.

The mounting piece 72d is coupled to the plate portion 73a at the rear end thereof by a third coupling portion 75. Specifically, the edge 72e at the rear end of the mounting piece 72d and the plate 73a are coupled by the third coupling portion 75. Thus, the pivoting angle of the plate portion 73a of the connection mounting piece 72d can be increased, and when the first mounting portion 71 and the second mounting portion 72 are brought close to each other by the pivoting of the vertically movable member 6, the plate portion 73a can be pivoted to the opposite side (lower side) to the first mounting portion 71, and when the first mounting portion 71 and the second mounting portion 72 are separated from each other, the plate portion 73a can be pivoted to the first mounting portion 71 side (upper side). The mounting piece 72d and the side surface of the plate 73a may be connected by the third connecting portion 75, and preferably, the edge of the surface 73b of the plate 73a may be connected. Thus, when the user pushes the pinching prevention hand 73 into the space portion R side, the burden imposed on the third connecting portion 75 can be reduced. Like the second coupling portion 74, the third coupling portion 75 may be formed such that the distance between the attachment piece 72d and the plate portion 73a is longer than the distance between the plate portions 73a in order to increase the fatigue limit.

The original cover folding device 1 of the present embodiment can stably and closely contact the original to the upper surface of the device main body 2 regardless of the thickness. Further, the support member 5 is attached to the original cover 3 via a lifting member 6 described later, whereby the intrusion of external light into the apparatus main body 2 and the obstruction of exposure can be prevented as much as possible. Further, the hand pinching prevention mechanism 7 prevents fingers of a person from entering and being pinched by the space R formed in the rear portions of the raising/lowering member 6 and the support member 5 when raising/lowering is started.

In other words, the lower surface of the upper plate 61 of the vertically movable member 6 abuts against the

stoppers

55 and 55 of the support member 5 by the urging force of the compression coil spring 21, and the rear end portion of the vertically movable member 6 does not rotate downward because the upper plate 51 of the support member 5 and the upper plate 61 of the vertically movable member 6 are substantially parallel and close to each other. Therefore, when the original cover 3 is lifted and the original is placed on the contact glass surface of the upper surface of the apparatus main body 2, normally, when the original cover 3 is lifted upward by gripping a grip portion (the grip portion is provided at an end portion opposite to the place where the lifting member 6 of the original cover 3 is attached, or in the vicinity thereof), the original cover 3 is rotated only about the first hinge shaft 11, and the contact glass surface is exposed to the outside. An original is placed on the exposed contact glass surface.

After the placement, when the lifted original cover 3 is lowered, the original cover 3 is rotated (moved downward) in a direction of contacting the contact glass surface about the first hinge shaft 11. At this time, the upper plate 61 of the elevation member 6 is maintained in a state of abutting against the

stoppers

55, 55 of the support member 5 by the urging force of the compression coil spring 21, in other words, the original platen 3 rotates, but the original platen 3 (elevation member 6) does not rotate about the second hinge shaft 12.

In this case, if the original placed on the contact glass surface is as thin as paper, the original cover 3 is in surface contact with paper. As a result, the entire original is in contact with the original cover 3 and the original is pressed against the contact glass surface, so that the original is stably in close contact with the contact glass surface.

On the other hand, when the original document 90 is thick like a book as shown in fig. 4, when the original document platen 3 is rotated (moved downward), a part of the vicinity of the support member 5 of the original document platen 3 comes into contact with the end 90a of the original document 90 on the support member 5 side or its vicinity, and a space is formed between the end opposite to the end 90a of the original document 90 on the support member 5 side and the original document platen 3. In other words, the original cover 3 at the end of the grip portion is in a floating state. When the end portion of the floating original cover plate 3 on the side of the holding portion, for example, is pressed against the contact glass surface, the operating member 14 presses the first slider 31 toward the second slider 32, and the first slider 31 moves toward the second slider 32 against the urging force of the compression coil spring 21, and the original cover plate 3 (the elevation member 6) rotates about the second hinge shaft 12. In other words, the original cover 3 is moved so as to cover the upper portion of the original 90. For example, when the upper portion of the original document 90 is a flat surface, the original document platen 3 is in surface contact with the upper portion of the original document 90. Therefore, the original 90 as thick as a book is stably in close contact with the contact glass surface. When the vertically movable member 6 is rotated about the second hinge shaft 12, a space R is formed between the rear end of the vertically movable member 6 and the rear end of the support member 5, and as shown in fig. 17, the hand pinching prevention mechanism 7 is not included, so that fingers of a person may enter the space R, and the hand pinching prevention mechanism 7 blocks the space R, thereby preventing the fingers of the person from entering the space R. Further, both ends of the anti-pinch portion 73 of the anti-pinch mechanism 7 in the vertical direction are rotatably mounted within a predetermined range, so that when the support member 5 is rotated from the maximum use open position to the maximum open position, the anti-pinch portion 73 is prevented from obstructing the rotation of the support member 5.

Therefore, the original cover closer 1 of the present invention can stably bring the original into close contact with the upper surface of the apparatus main body 2 regardless of the thickness, and can be used more safely by the user than the known invention.

In the first embodiment, the second mounting portion 72 is mounted on the support member 5, but the present invention is not limited thereto. The second mounting portion 72 may also be mounted to the mounting member 4 or the first hinge shaft 11. The second attachment portion 72 may not be provided. Even in this case, the hand pinching prevention section 73 prevents a finger or the like of a person from entering the space R.

Further, in the first embodiment of the present invention, the second connecting portion 74 between the first mounting portion 71 and the hand pinching prevention portion 73 and the third connecting portion 75 between the second mounting portion 72 and the hand pinching prevention portion 73 constituting the hand pinching prevention mechanism 7 are formed to have a wall thickness larger than the first connecting portion 73e between the plurality of

plate portions

73a and 73a … constituting the hand pinching prevention portion 73 connected thereto. This makes the portion of the connecting portion formed with a thickness less likely to bend. Therefore, when the original cover 3 is brought into contact with the closed position on the upper surface of the apparatus main body 2, the hand pinching prevention portion 73 is bent by the first connecting portion 73e, and the bending angle thereof can be adjusted, thereby reducing the load applied to the first connecting portion 73 e.

However, the thickness of the coupling portion may be the same as the thickness of all other coupling portions.

Example two. Fig. 8 shows a second embodiment of the original cover pressing device according to the present invention. The original cover opening and closing device 1A according to the second embodiment is different from the original cover opening and closing device 1 according to the first embodiment in that the hand pinching prevention portion 73 of the hand pinching prevention mechanism 7 according to the second embodiment includes not only the first coupling portion 73e but also the shape adjustment coupling portion 73 g. Since the other components are the same as those in the first embodiment, the same reference numerals as those in the first embodiment are given to these components, and the description thereof will be omitted.

The shape adjusting coupling portion 73g is formed to have a thickness greater than that of the first coupling portion 73e, and is formed to have flexibility similar to that of the first coupling portion 73e, in place of a part of the first coupling portion 73e, the second coupling portion 74, or the third coupling portion 75, so as to couple the plate portion 73a and the first mounting portion 71 or the second mounting portion 72. Therefore, the shape adjusting coupling portion 73g is less likely to bend than the first coupling portion 73e, and the shape of the pinching prevention hand portion 73 can be changed when the distance between the first attachment portion 71 and the second attachment portion 72 becomes short.

Example three. Fig. 9 to 15 show a third embodiment of the original cover folding device according to the present invention. The original manuscript pressing plate opening and closing device 1B of the third embodiment is different from the original manuscript pressing plate opening and

closing devices

1 and 1A of the first and second embodiments in that the hand pinching preventing mechanism 8 of the original manuscript pressing plate opening and closing device 1B of the third embodiment is formed by using one flat plate member 85 as the bamboo curtain-shaped hand pinching preventing part of the first or second embodiment. Since the structure of the hand pinching prevention mechanism 8 other than the plate member 85 and the pivot support portion 81 is the same as that of the first and second embodiments, the same reference numerals are given thereto and the description thereof will be omitted. The mounting piece 53 shown in the first and second embodiments of the support member 5 is omitted.

The anti-pinch mechanism 8 of the third embodiment is composed of the following components: a plate member 85 in the form of a flat plate; and a swing support 81 for supporting the plate member 85 to the elevating member 6 in a manner of swinging in one direction, wherein

support plates

85b, 85b are provided on both sides of the upper end of the plate member 85, and

protrusions

85c, 85c are provided on the inner sides of the

support plates

85b, 85 b. The rocking support 81 is formed by: a fixed plate 81a extending horizontally from the front end side to the rear end side of the vertically movable member 6 and having a mounting hole 81f formed therein for mounting to the upper plate 61 of the vertically movable member 6 with a screw or the like; a front plate 81b extending from a front end of the fixed plate 81a in a direction perpendicular to the fixed plate 81a (including a substantially perpendicular direction); a top plate 81c extending from the front end of the front plate 81b in a direction perpendicular to the front plate 81b (including a substantially perpendicular direction) and in a direction away from the fixing plate 81 a; a mounting piece 81d extending from the front end of the top plate 81c in a direction perpendicular to the top plate 81c (including a substantially perpendicular direction) and opposite to the front plate 81 b; and a restricting plate 81e extending linearly from the tip of the mounting piece 81 d. The front plate 81b, the top plate 81c, and the mounting piece 81d form a third mounting groove 82 into which the mounting piece 63 of the vertically movable member 6 is inserted. The pivot support 81 has the mounting piece 63 inserted into the third mounting groove 82 in a state where the fixed plate 81a is disposed on the rear end side of the vertically movable member 6 (upper plate 61) with respect to the front plate 81 b.

The mounting piece 81d has recesses 81g formed on both side surfaces thereof into which the projections 85c are fitted, and is formed thick in a state where the original cover plate 3 is in close contact with the contact glass surface of the upper surface of the apparatus body 2 (in a closed position (see fig. 9)), a space portion is formed so that the plate member 85 does not abut against the support member 5, and a surface of the mounting piece 81d, which faces the plate member 85 at a rear end portion thereof, is curved, thereby preventing the plate member 85 from being hindered from rotating.

The thickness of the restriction plate 81e is formed thick so that the restriction plate 81e can abut against the plate member 85 and restrict rotation when the plate member 85 is pushed to the space portion R side.

The plate member 85 may be divided into a plurality of wide plate portions having a width larger than that of the plate portion 73a of the first and second embodiments, and connected to each other by a connecting member so as to be bendable in one direction.

In addition, in the case where the hand pinching prevention mechanism 8 is provided, as shown in fig. 16, the mounting piece 53 and the

stopper pieces

55 and 55 as shown in the first and second embodiments may not be provided in the support member 5. In this case, the upper plate 61 of the elevation member 6 abuts against the upper plate 51 of the support member 5.

The present invention described in detail above is simple in structure and is suitable for use in an original cover closer including a lifting mechanism, particularly, in office machines such as a photocopier, taking into consideration the safety of the office machines, and office machines using the original cover closer.

Claims

1. An original manuscript pressing plate opening and closing device comprises:

a mounting member mounted on a device body side of an office machine having a manuscript pressing plate;

a support member rotatably pivotally supported at the mounting member via a first hinge shaft; and

a lifting member which is overlapped with the supporting member, is pivotally supported on a free end side of the supporting member via a second hinge shaft in a direction opposite to the supporting member, and is mounted on the original cover;

the manuscript pressing plate opening and closing device comprises a hand clamping prevention mechanism which is arranged between the lifting member and the supporting member or the mounting member or the first hinge shaft, and is used for blocking a space part formed between the lifting member and the supporting member when the lifting member rotates towards the direction opposite to the supporting member.

2. The original cover closer of claim 1, wherein the finger-pinch preventing mechanism comprises:

the bamboo curtain-shaped hand clamping preventing part is formed to be bent in a single direction; and

the first installation part is connected with the upper end part of the anti-pinch part and is installed on the lifting component.

3. The original manuscript pressboard device of claim 2, wherein said prevent tong mechanism prevent tong portion include:

a plurality of plate portions in the form of a paper strip; and

and a connecting portion that bendably connects the plurality of plate portions to each other.

4. The original manuscript pressing plate opening and closing device according to claim 3, wherein a bending prevention protrusion is provided between the plurality of plate parts of the hand clamping prevention mechanism to limit the bending direction of the plurality of plate parts to a single direction.

5. The original cover closer device according to claim 4, wherein said finger-pinch preventing mechanism comprises:

the second connecting portion connects the anti-pinch portion with the first mounting portion.

6. The original cover closer according to any one of claims 1 to 5, wherein the finger pinch preventing mechanism comprises:

and the second installation part is installed at the other end of the anti-pinch hand part in a connection mode and used for supporting the component or the installation component or the first hinge shaft.

7. The original cover closer of claim 6, wherein the finger-pinch preventing mechanism comprises:

the third linking portion links the anti-pinch portion and the second mounting portion.

8. The original cover closer according to claim 2, wherein the link portion controls flexibility of the plurality of plate portions by changing a thickness thereof.

9. The original cover closer according to claim 1, wherein the finger pinching prevention mechanism is constituted by a plate member having a flat plate shape, and is configured to be turnable toward a rear end portion side of the elevation member via a swing support portion.

10. The original cover folding device according to claim 9, wherein the plate member is constituted by a plurality of wide plate portions formed to have a width larger than that of the plate portion according to claim 3, and is constituted to be foldable in one direction with a connecting portion.

11. The original cover folding device according to claim 9, wherein an end of the plate member is rotatably attached to a rear end side of the elevation member via the pivot support portion, and rotation with the attachment member to the space portion side is restricted.

12. An office machine using the original cover closer according to any one of claims 1 to 11.