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

Abstract

Provided is a manuscript pressing plate opening and closing device and an office machine including the manuscript pressing plate opening and closing device, which can prevent fingers from being pinched in the space portion generated between the lifting member and the supporting member and causing injury. The manuscript pressing plate opening and closing device 1 comprises: a mounting member 4, which is mounted on the device body 2 side of the office machine having the manuscript pressing plate 3; a supporting member 5, which is pivotally supported on the mounting member 4 rotatably via a first hinge shaft 11; and a lifting member 6, which overlaps with the supporting member 5 and is pivotally supported on the free end side of the supporting member 5 rotatably via a second hinge shaft 12 in the opposite direction to the supporting member 5, and is mounted on the manuscript pressing plate 3, wherein in order to block the space portion formed between the lifting member 6 and the supporting member 5 when the lifting member 6 rotates in the opposite direction to the supporting member 5, an anti-pinch mechanism 7 is provided between the lifting member 6 and the supporting member 5 or the mounting member 4 or the first hinge shaft 11.

Description

Original platen opening and closing device and office machine including the original platen opening and closing device

technical field

The invention relates to a document pressing plate opening and closing device included in office machines such as photocopiers, compound machines, printing presses, fax machines, scanners and the like, and an office machine including the document pressing plate opening and closing device.

Background technique

For the device body of office machines such as photocopiers, printing machines, fax machines, scanners, etc., the original platen is rotatably installed on the upper and rear of the device body through the original platen opening and closing device. The original pressing plate opening and closing device is a hinge mechanism, which pivotally supports the original pressing plate around the hinge shaft, so that the original pressing plate can be in close contact with the contact glass surface on the upper surface of the device body, and at the same time make the contact glass can be exposed. When placing the original on the contact glass surface, turn the original platen (open and close vertically) to expose (open) the contact glass surface. After placing the original on the contact glass surface, close the original platen and press the original. On the contact glass side, thereby placing the original on the contact glass side.

In this kind of document pressing plate opening and closing device, as described in Japanese Patent Laid-Open No. 11-95339, it is known that there is a document pressing plate opening and closing device, which is provided with a lifting member and a compression coil spring, so that the document can be opened and closed regardless of the thickness. The contact glass is in close contact, and at the same time, by the urging force of the compression coil spring, the original platen can be rotated without feeling its original weight.

A document pressing plate opening and closing device described in Japanese Patent Laid-Open No. 11-95339 includes: a mounting member mounted on a device body of an office machine; a support member pivotally supported on the mounting member via a first hinge shaft a lift member overlapping the support member while being pivotally supported at the free end of the support member via a second hinge shaft and mounted on the original press platen; and a compression coil spring provided between the lift member and the mounting member , and push the lift member in the direction overlapping with the support member.

As a result, in the case of photocopying a thick document like a book, when the thick document is placed on the contact glass and the document platen is rotated in the closing direction, the document platen contacts the end of the document on the document platen opening and closing device side. When the original pressing plate is pressed down again, the lifting member is reversed relative to the supporting member with the second hinge axis as a fulcrum, and the original pressing plate is horizontally arranged on the contact glass, so that the thick original is pressed on the contact glass, and the external light can be prevented. Access to and from the interior of the office machine via the contact glass.

In this way, as shown in FIG. 17 , a space portion is created between the rear portion of the elevating member and the rear portion of the support member. The document pressing plate opening and closing device is configured to take away the thick document on the contact glass, and open it once in the opening direction, the lifting member and the supporting member overlap and return to the original position. The plywood, the original pressing plate, that is, the lifting member is closed without returning to its original position, and the state where the front end side of the original pressing plate is lowered, and a space is created between the rear of the lifting member and the rear of the supporting member closed in the state of the part. Even in this case, the document pressing plate is opened only once in the opening direction, and the lifting member and the supporting member can be overlapped and returned to the original position. However, due to ignorance or misunderstanding of the device, sometimes the operator does not perform this operation, reaches the rear end of the original press platen and presses down the part where the hand is placed on the lifting member.

As a result, there is a problem in that the fingers get caught in the space formed between the lift member and the support member, causing injury.

SUMMARY OF THE INVENTION

The present invention is to solve the above-mentioned problems, and its object is to provide a document platen opening and closing device that can prevent the above-mentioned accident from occurring in the known document platen opening and closing device, and an office device including the document platen opening and closing device. machine.

In order to achieve the above object, a document pressing plate opening and closing device of the present invention has: a mounting member installed on the device body side of an office machine having a document pressing plate; a supporting member, pivotally supported on the first hinge shaft rotatably. a mounting member; and an elevating member, which overlaps with the supporting member, is pivotally supported on the 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 document pressing plate; wherein the document pressing The plywood opening and closing device includes an anti-pinch mechanism, which is arranged between the lifting member and the supporting member or the mounting member or the first hinge shaft. space between the support members.

Next, the anti-pinch mechanism of the present invention includes: a bamboo-curtain-shaped anti-pinch hand part, which can be bent in one direction;

Next, the anti-pinch hand portion of the hand-pinch prevention mechanism of the present invention includes: a plurality of plate parts in the shape of a paper strip; and a connecting portion that connects the plurality of plate parts in a bendable manner.

Next, according to the present invention, a bending prevention protrusion is provided between the plurality of plate parts of the anti-pinch hand part of the hand-pinch prevention mechanism, and the bending direction of the plurality of plate parts is restricted to one direction.

Next, the anti-pinch mechanism of the present invention includes: a second connecting portion connecting the anti-pinch portion and the first mounting portion.

Next, the anti-pinch mechanism of the present invention includes a second mounting portion, a support member, or a mounting member, or a first hinge shaft attached to the other end of the anti-pinch portion.

Next, the anti-pinch mechanism of the present invention includes a third connecting portion for connecting the anti-pinch portion and the second mounting portion.

Next, the connecting portion of the present invention controls the flexibility of the plurality of plate portions by changing the thickness thereof.

Next, the hand-pinch prevention mechanism of the present invention is constituted by a flat plate member, and the plate member is configured to be rotatable toward the rear end portion side of the elevating member via the rocking support portion.

Next, the plate member of the present invention is composed of a plurality of wide plate portions formed to have a wider width than the above-described plate portion, and is configured to be bendable to each other in one direction by the connection portion.

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

Next, an office machine of the present invention uses the above-mentioned document platen opening and closing device.

The present invention is constructed as described above. According to the present invention, even a thick document like a book can be horizontally covered and pressed against the contact glass by the document lamination plate, and the penetration of external light into the device body can be prevented as much as possible. As a result, it is also possible to provide a high-safety document pressing plate opening and closing device, which can prevent the user's fingers from being caught in the spaces created by the rear parts of the lift member and the support member and be injured beforehand.

According to the present invention, since the anti-pinch hand can be prevented from being bent inward, the anti-pinch hand can be prevented from entering between the upper plate of the support member and the upper plate of the elevating member, and human fingers and the like can also be prevented from entering between the elevating member and the supporting member. The space part formed between each rear part is clamped.

According to the present invention, the anti-pinch hand portion may be formed in a state where the plurality of plate portions are connected to each other, and the plate portions may be connected to each other in a bendable manner.

According to the present invention, it is possible to prevent the anti-pinch hand from being pushed into the interior of the space.

According to the present invention, the anti-pinch hand portion is rotatable relative to the first mounting portion.

According to the present invention, it is possible to more reliably prevent the pinch preventing hand from being pushed into the space.

According to the present invention, the anti-pinch hand portion is rotatable relative to the second mounting portion.

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

According to the present invention, it is possible to prevent a person's finger or the like from being caught in a space formed at the rear of the lift member and the support member formed when the lift is started.

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

According to the present invention, it is possible to more reliably prevent the pinch preventing hand from being pushed into the space.

According to the present invention, there can be provided an office machine using the above-described document platen opening and closing device.

Description of drawings

FIG. 1 is a side view showing an example of the document platen opening and closing device of the present invention.

FIG. 2 is a rear view showing an example of the document platen opening and closing device of the present invention.

3 is a diagram showing an example of the anti-pinch mechanism of the document platen opening and closing device of the present invention, wherein (a) is a perspective view, and (b) is a side view and a partial enlarged view thereof.

4 is a side view showing the operation of the hand-pinch prevention mechanism when the elevating member of the document platen opening and closing device of the present invention is reversed relative to the support member.

FIG. 5 is a rear view showing the document platen opening and closing device shown in FIG. 4 .

6 is a side view showing a fully opened state of the document platen opening and closing device of the present invention.

7 is a diagram illustrating a state where the anti-pinch mechanism of the document pressing plate opening and closing device of the present invention does not bend inward and maintains a slightly bent state, and a partial enlarged view thereof.

8 is a side view showing another embodiment of the document platen opening and closing device of the present invention.

9 is a side view showing still another embodiment of the document platen opening and closing device of the present invention.

FIG. 10 is a rear view of the document platen opening and closing device shown in FIG. 9 .

FIG. 11 is an enlarged exploded perspective view of the anti-pinch mechanism of the document pressing plate opening and closing device shown in FIG. 9 .

12 is a side view illustrating the operation of the anti-pinch mechanism of the document platen opening and closing device shown in FIG. 9 .

FIG. 13 is a rear view of the document platen opening and closing device shown in FIG. 12 .

FIG. 14 is a side view showing a fully opened state of the document platen opening and closing device shown in FIG. 9 .

15 is a partially enlarged cross-sectional view of the connection portion between the plate member and the rocking support portion of the anti-pinch mechanism of the document pressing plate opening and closing device shown in FIG. 9 , (a) is the part shown in FIG. b) is the part of view B shown in FIG. 14 .

16 is a side view showing still another embodiment of the document platen opening and closing device of the present invention.

Fig. 17 is a side view of a known document platen opening and closing device.

Detailed ways

Hereinafter, embodiments of the document platen opening and closing device of the present invention and an office machine using the document platen opening and closing device of the present invention will be described in detail based on the accompanying drawings.

Example 1. 1 to 7 are diagrams showing examples of the document platen opening and closing device using the document platen opening and closing device according to the first embodiment of the present invention, and an example of an office machine using the document platen opening and closing device. The document pressing plate opening and closing device 1 of the present invention is a hinge device, and the document pressing plate 3 can be opened and closed on the upper surface of the device body 2 of office machines such as photocopiers, printing machines, facsimile machines, and scanners.

As shown in the figure, the document pressing plate opening and closing device 1 of the present invention includes: a mounting member 4 mounted on the device body 2; The side plates 42, 42; and the lifting member 6 are mounted on the document pressing plate 3 in a state of being rotatably connected to the two side plates 52, 52 of the support member 5 via the second hinge shaft 12; During normal use, the document pressing plate 3 is rotated from the closed position in contact with the apparatus body 2 to the maximum open position, and the support member 5 is further rotated from the maximum open position to the maximum open position during maintenance. The feature of the document pressing plate opening and closing device 1 of the present invention is that it is provided with an anti-pinch mechanism 7, which prevents human fingers from entering when the lifting member 6 rotates with the second hinge shaft 12 inserted through the supporting member 5 as the axis. the space part R. In addition, the first hinge shaft 11 and the second hinge shaft 12, although one is shown in the drawings, can also be divided into two sections pivotally supported on the two side plates 42, 42 of the mounting member 4 and the support The two side plates 52 , 52 of the member 5 are each other, and the two side plates 52 , 52 of the supporting member 5 and the two side plates 62 , 62 of the lifting member 6 are each other. In the present invention, the first hinge shaft 11 and the second hinge shaft 12 include those described above.

The mounting member 4, as shown in FIG. 1, is composed of the following members: a bottom plate 41, which is mounted on the upper end side of the rear part of the device body 2; extending in the direction of the base plate 41 (including the substantially vertical direction); and a substantially rectangular mounting piece 43 extending from one end (rear end) of the base plate 41 to the direction perpendicular to the base plate 41 (including the substantially vertical direction) .

The bottom plate 41 is formed in a substantially rectangular shape, and the bottom plate 41 is provided with mounting holes (not shown) in order to attach the bottom plate 41 to the apparatus main body 2 with screws, bolts, or the like. The two side plates 42 and 42 are formed to have a substantially L-shaped cross section, and the first hinge shaft hole 46 is provided at the front end (upper portion) of the mounting piece 42a. direction) extension. The pressure-receiving member hole 47 is provided at a position further to the bottom plate 41 side (downward) and inward (forward) than the first hinge shaft hole 46 of the attachment piece 42a. The pressure-receiving member 13 is inserted into the pressure-receiving member holes 47 penetrating the two mounting pieces 42a. In addition, the pressure-receiving member 13 does not need to be in the shape of a pin, and a curved member or a resin product may be attached between the two side plates 42 and 42 .

The support member 5 is composed of the following members: an upper plate 51; The plates 52 and 52 respectively cover the two side plates 42 and 42 of the mounting member 4 and the holding pieces 54 and 54 from both side end portions along the sliding direction of the pair of sliders 31 and 32 to be described later. The front end portions of the side plates 52 and 52 are bent at 90 degrees to each other. Further, the support member 5 is provided with stoppers 55 and 55 from the two side plates 52 and 52 upward. In addition, when the second attachment portion 72 is attached to the lower surface side of the upper plate 61 of the elevating member 6, the stoppers 55 and 55 may be omitted.

One end portion (front end portion) of the two side plates 52 and 52 is provided with a second hinge shaft hole (not shown) through which the second hinge shaft 12 is inserted, and a cutout for allowing the operation member 14 to be described later to enter. parts 56 and 56 (illustration of the other is omitted). The other end part (rear end part) of the two side plates 52 and 52 is provided with the 1st hinge shaft insertion hole (not shown). The first hinge shaft insertion holes of the two side plates 52 and 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 connected to the first hinge. The shaft 11 is rotatably connected to the mounting member 4 as a shaft.

A 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 which are bottom surfaces, and are formed in a bottomed cylindrical shape having a rectangular cross section. The pair of sliders 31 and 32 are respectively slidably fitted into the support member 5 so that their openings 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 interiors of the sliders 31 and 32 are formed as spring accommodating portions 31 c and 32 c that accommodate the compression coil spring 21 . The compression coil springs 21 can also be one or more than two, for example, two are arranged side by side or overlapped to push the pair of sliders 31 and 32 away from each other.

The pair of sliders 31 and 32 are formed so that when the bottom plate 41 of the mounting member 4 and the support member 5 (upper plate 51 ) are substantially parallel (for example, when the document platen opening and closing device 1 of the present invention is mounted on a photocopier or the like, The length of the document holder 3 to be fitted into the support member 5 when the document holder 3 is in close contact with the contact glass surface of the upper surface of the apparatus body 2 (when the document holder is in close contact).

The slider (first slider) 31 on the front end portion side is formed as a flat surface on the outer surface of the closing surface 31a of the bottom surface. The blocking surface 31 a presses the moving member 14 by the urging force of the compression coil spring 21 , and the supporting member 5 and the lifting member 6 are overlapped. In this case, the place where the support member 6 is connected to the support member 5 by the second hinge shaft 12 is moved higher than the known one, and the lower surface side of the upper plate 61 of the elevating member 6 is configured to abut against the support member The two side plates 52 and 52 of the The second mounting portion 72 on the rear end portion side, and the elevating member 6 is not inclined with respect to the supporting member 5 .

The elevating member 6 is constituted by the following members: an upper plate 61, which is attached to the rear end side of the original press platen 3 with screws or the like; The plate 61 extends in the direction (including the substantially vertical direction), and the mounting piece 63 is formed so as to be bent 90 degrees from one end (rear end) of the upper plate 61 to the opposite side to the two side plates 62 and 62 . The second hinge shaft insertion hole (not shown) is provided on the front end side of the two side plates 62 and 62 of the elevating member 6, and the operating member hole (not shown) through which the operating member 14 is inserted is provided at a position higher than the first The lower side of the two hinge shaft insertion holes. The operating member 14 is inserted into the operating member hole which penetrates and is fixed to the two side plates 62 and 62 . The second hinge shaft insertion holes of the two side plates 62 and 62 of the lifting member 6 and the second hinge shaft holes of the two side plates 52 and 52 of the support member 5 are aligned, and the second hinge shaft 12 is inserted through these holes. Accordingly, the elevating member 6 and the supporting member 5 are rotatably connected to each other about the second hinge shaft 12 as an axis. In addition, although the operation member 14 is shown as a pin or a shaft, other types of operation members, or operation members provided integrally or separately from the front end side of the elevating member 6 may be used. The operation member 14 also includes the above.

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, as shown in FIG. 3, is formed by the following components: a bamboo curtain-shaped anti-pinch hand portion 73; The first mounting portion 71 is mounted on the rear end portion of the lifting member 6 which is connected to the upper end of the anti-pinch hand portion 73; , wherein the anti-pinch hand portion 73 , the first mounting portion 71 , and the second mounting portion 72 are integrally formed with thermoplastic resin and are bent in one direction. The anti-pinch hand portion 73 is constituted by the following members: a plurality of plate portions 73a, 73a, . 73d, 73d, . . . are formed on both ends of each plate portion 73a, 73a, .

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 anti-pinch portion 73 can be bent and the first connecting portion 73e does not enter the space portion R, which can respond to changes in the distance between the first mounting portion 71 and the second mounting portion 72 caused by the rotation of the elevating member 6 . (Refer to FIGS. 1 and 4 ).

Further, a small gap 76 is formed between the plate portions 73a, 73a . . . and the width of the plate portions 73a, 73a . It is located in the two end parts of each surface 73c, 73c... and each surface 73b, 73b... on the opposite side, and has an inscribed shape when viewed from the front. Thereby, even if the user pushes the hand-pinch preventing portion 73 into the space portion R, the bending preventing protrusions 73d abut against each other, so that the hand-pinch preventing portion 73 can be prevented from being pushed into the space portion R. As shown in FIG.

Further, the plate portion 73 a constituting the uppermost portion of the anti-pinch hand portion 73 is connected to the first mounting portion 71 via the second connecting portion 74 . The first attachment portion 71 is formed by a fixing plate 71a extending in the horizontal direction from the front end side to the rear end side of the elevating member 6, and forming attachment holes for attaching to the upper plate 61 of the elevating member 6 with screws or the like. 71f; the front plate 71b, extending from the front end of the fixed plate 71a to the direction perpendicular to the fixed plate 71a (including approximately vertical direction); the top plate 71c, from the front end of the front plate 71b to the direction perpendicular to the front plate 71b (including approximately vertical direction) and extend away from the fixed plate 71a; and the mounting piece 71d extends from the front end of the top plate 71c to the direction perpendicular to the top plate 71c (including the substantially vertical direction) and relative to the front plate 71b. The front plate 71b, the top plate 71c, and the attachment pieces 71d are formed to have substantially the same width as the upper plate 61 of the elevating member 6, and these form the first attachment grooves 71g into which the attachment pieces 63 of the elevating member 6 are inserted. In the first mounting portion 71, the mounting piece 63 is inserted into the first mounting groove 71g in a state where the fixing plate 71a is disposed on the rear end side of the lift member 6 (upper plate 61) rather than the front plate 71b.

The attachment piece 71 d is connected to the plate portion 73 a at the front end thereof via the second connection portion 74 . Specifically, the outer edge 71e and the plate portion 73a are connected by the second connecting portion 74, and the outer edge 71e is an edge on the opposite side to the inner edge of the first mounting groove 71g forming the tip end of the mounting piece 71d. As a result, the rotation angle of the plate portion 73a of the continuous 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 rotation of the elevating member 6, the plate portion 73a can move toward the second mounting portion. When the opposite side (upper side) of 72 is rotated and the first mounting portion 71 and the second mounting portion 72 are separated, the plate portion 73a can be rotated toward the second mounting portion 72 side (downward). In addition, the attachment piece 71d and the side surface of the plate portion 73a may be connected by the second connection portion 74, and preferably the edge portion of the surface 73c of the plate portion 73a is connected. Thereby, when the user pushes the anti-pinch portion 73 to the side of the space portion R, the burden on the second connecting portion 74 can be reduced. In order to increase the fatigue limit, the second connection 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 73a.

In addition, the lowermost plate portion 73 a and the second attachment portion 72 are connected by the third connection portion 75 . Like the first mounting portion 71, the second mounting portion 72 is formed of a fixing plate 72a extending in the horizontal direction from the front end side to the rear end side of the support member 5, and is formed so as to be mounted on the support member with screws or the like. The mounting hole 72f of the upper plate 51 of The direction (including the substantially vertical direction) of the plate 72b extends away from the fixed plate 72a; and the mounting piece 72d extends from the front end of the top plate 72c to the direction perpendicular to the top plate 72c (including the substantially vertical direction) and is opposite to the top plate 72c. The front plate 72b extends. A second attachment groove 72g into which the attachment piece 53 of the support member 5 is inserted is formed by the front plate 72b, the top plate 72c, and the attachment piece 72d. In the second mounting portion 72, the mounting piece 53 is inserted into the second mounting groove 72g in a state in which the fixing plate 72a is disposed on the rear end side of the support member 5 (upper plate 51) rather than the front plate 72b.

The rear end of the attachment piece 72d is connected to the plate portion 73a via the third connection portion 75 . Specifically, the edge portion 72e at the rear end of the attachment piece 72d and the plate portion 73a are connected by the third connection portion 75 . As a result, the rotation angle of the plate portion 73a of the continuous 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 rotation of the elevating member 6, the plate portion 73a can move toward the first mounting portion. When the opposite side (downward) of 71 is rotated, and the first mounting portion 71 and the second mounting portion 72 are separated from each other, the plate portion 73a can be rotated toward the first mounting portion 71 side (upper). Moreover, the attachment piece 72d and the side surface of the plate part 73a may be connected by the 3rd connection part 75, Preferably, the edge part of the surface 73b of the plate part 73a is connected. Thereby, when the user pushes the hand-pinch preventing portion 73 to the side of the space portion R, the burden on the third connecting portion 75 can be reduced. Similar to the second connection portion 74 , the third connection 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.

In the document pressing plate opening and closing device 1 of this embodiment, regardless of the thickness, the document can stably and closely contact the upper surface of the device body 2 . In addition, since the support member 5 is attached to the original press platen 3 via the elevating member 6 to be described later, it is possible to prevent external light from entering the inside of the apparatus main body 2 as much as possible and preventing exposure. Furthermore, the hand-pinch prevention mechanism 7 can prevent a person's finger or the like from being caught in the space R formed by the lift member 6 and the rear portion of the support member 5 formed when the lift is started.

In other words, by the urging force of the compression coil spring 21, the lower surface of the upper plate 61 of the lifting member 6 abuts against the blocking pieces 55, 55 of the supporting member 5, since the upper plate 51 of the supporting member 5 and the upper plate 61 of the lifting member 6 are The rear ends of the lift members 6 are substantially parallel and close to each other, and the rear ends of the lift members 6 do not rotate downward. Therefore, when raising the document platen 3 and placing the document on the contact glass surface of the upper surface of the apparatus main body 2, normally, the grasping part (the holding part is provided opposite to the place where the lifting member 6 of the document platen 3 is installed) is held. When the original platen 3 is lifted upwards, the original platen 3 rotates only about the first hinge shaft 11 to expose the contact glass surface to the outside. Place the original on the exposed contact glass surface.

After being placed, when the raised original platen 3 is lowered, the original platen 3 rotates (moves downward) about the first hinge shaft 11 in the direction of contacting the contact glass surface. At this time, the urging force of the compression coil spring 21 maintains the state in which the upper plate 61 of the lift member 6 abuts against the stoppers 55 and 55 of the support member 5 . 6) It will not rotate with the second hinge shaft 12 as the axis.

At this time, if the thickness of the original placed on the contact glass surface is as thin as paper, the original press plate 3 is in surface contact when it contacts the paper. As a result, the entire original is brought into contact with the original press platen 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 document 90 is as thick as a book as shown in FIG. 4 , when the document platen 3 is rotated (moved downward), a part of the vicinity of the support member 5 of the document platen 3 comes into contact with the support of the document 90 . A space is formed between the end portion 90 a on the side of the member 5 or its vicinity, and the end portion on the opposite side of the end portion 90 a on the side of the supporting member 5 of the original document 90 and the document pressing plate 3 . In other words, the document pressing plate 3 at the end on the grip portion side is in a floating state. When the floating document pressing plate 3 is pressed near the end on the grip portion side, for example, on the contact glass surface side, the operation member 14 presses the first slider 31 to the second slider 32 side against the urging force of the compression coil spring 21 . With the force, the first slider 31 moves toward the second slider 32 side, and at the same time, the document pressing plate 3 (elevating member 6 ) rotates about the second hinge shaft 12 . In other words, the original pressing plate 3 is moved so as to cover the upper part of the original 90 . For example, when the upper part of the original document 90 is a flat surface, the original pressing plate 3 is in surface contact with the upper part of the original document 90 . Therefore, the original 90 as thick as a book is stably brought into close contact with the contact glass surface. Furthermore, when the lift member 6 rotates about the second hinge shaft 12, a space R is formed between the rear end of the lift member 6 and the rear end of the support member 5, and the anti-pinch mechanism 7 is not included as shown in FIG. 17 . In this case, human fingers and the like may enter the space portion R. By shielding the space portion R with the anti-pinch mechanism 7 , the entry of human fingers and the like into the space portion R can be prevented. In addition, both ends in the vertical direction of the anti-pinch hand portion 73 of the anti-pinch hand mechanism 7 are mounted so as to be rotatable within a predetermined range, whereby when the support member 5 is rotated from the maximum open position for use to the maximum open position, the anti-pinch can be prevented. The hand 73 hinders the rotation of the support member 5 .

Therefore, the document pressing plate opening and closing device 1 of the present invention can stably and closely contact the document on the device body 2 regardless of the thickness. This effect is obtained, and the user can use it more safely than the known invention.

Furthermore, in the first embodiment, the second attachment portion 72 is attached to the support member 5, but the present invention is not limited to this. The second attachment portion 72 may be attached to the attachment member 4 or the first hinge shaft 11 . In addition, the second mounting portion 72 may not be provided. Even in this case, the entry of human fingers or the like into the space portion R can be prevented by the anti-pinch hand portion 73 .

Further, in the invention of the first embodiment, the second connecting portion 74 between the first mounting portion 71 and the anti-pinch hand portion 73 of the anti-pinch hand mechanism 7 and the second connecting portion 74 between the second mounting portion 72 and the anti-pinch hand portion 73 are formed. The third connection portion 75 is formed to be thicker than the first connection portion 73e between the plurality of plate portions 73a, 73a, . Thereby, the part of the connection part formed with thickness becomes hard to bend. Therefore, when the document pressing plate 3 contacts the upper surface of the apparatus body 2 in the closed position, the anti-pinch portion 73 is bent by the first connecting portion 73e, and the bending angle thereof can be adjusted, thereby reducing the amount of stress applied to the first connecting portion 73e. burden.

However, the structure may be configured such that the thickness of the connecting portion is the same as that of all other connecting portions.

Example two. FIG. 8 shows a second embodiment of the document pressing plate apparatus of the present invention. The difference between the document platen opening and closing device 1A of the second embodiment and the document platen device 1 of the first embodiment is that the anti-pinch hand part 73 of the anti-pinch hand mechanism 7 of the second embodiment not only includes the first connecting part 73e , and also includes the connection portion 73g for shape adjustment. Since the other constituent elements are the same as those of the first embodiment, the same reference numerals as those of the first embodiment are assigned to these, and the description thereof is omitted.

The connection portion 73g for shape adjustment replaces a part of the first connection portion 73e, the second connection portion 74, or the third connection portion 75, and is used to connect the plate portion 73a and the first attachment portion 71 or the second attachment portion 72, and the The first connecting portion 73e also has flexibility, but is formed to be thicker than the first connecting portion 73e. Therefore, the connection portion 73g for shape adjustment becomes less likely to be bent than the first connection portion 73e, and the shape of the anti-pinch hand portion 73 can be changed when the distance between the first attachment portion 71 and the second attachment portion 72 is shortened. .

Example three. 9 to 15 show the third embodiment of the device for opening and closing the document pressing plate according to the present invention. The difference between the original platen opening and closing device 1B of the third embodiment and the original platen devices 1 and 1A of the first and second embodiments is that the anti-pinch mechanism 8 of the original platen opening and closing device 1B of the third embodiment , the bamboo curtain-shaped anti-pinch hand of the first or second embodiment is composed of a flat plate member 85 . Since the configurations other than the plate member 85 and the rocking support portion 81 of the hand-pinch prevention mechanism 8 are the same as those of the first and second embodiments, the same reference numerals are assigned and the description thereof is omitted. In addition, in the support member 5, the mounting piece 53 shown in the first and second embodiments is omitted.

The anti-pinch mechanism 8 of the third embodiment is composed of the following components: a flat plate member 85; Support plates 85b, 85b are provided on both sides of the upper end of the upper end, and the support plates 85b, 85b are provided with protrusions 85c, 85c on the inner side. The rocking support portion 81 is formed by a fixed plate 81a extending in the horizontal direction from the front end side to the rear end side of the elevating member 6, and having a mounting hole 81f for attaching to the upper plate 61 of the elevating member 6 with screws or the like. The front plate 81b extends from the front end of the fixed plate 81a to the direction perpendicular to the fixed plate 81a (also includes a substantially vertical direction); direction) and extend away from the fixed plate 81a; the mounting piece 81d extends from the front end of the top plate 81c to the direction perpendicular to the top plate 81c (including the substantially vertical direction) and relative to the front plate 81b; and the limiting plate 81e, It extends in the same straight line from the front end of the attachment piece 81d. The front plate 81b, the top plate 81c, and the attachment piece 81d form a third attachment groove 82 into which the attachment piece 63 of the elevating member 6 is inserted. The rocking support portion 81 inserts the mounting piece 63 into the third mounting groove 82 in a state where the fixed plate 81a is disposed on the rear end side of the lift member 6 (upper plate 61 ) rather than the front plate 81b.

The mounting piece 81d has recesses 81g formed on both side surfaces into which the protrusions 85c are fitted, and the document press plate 3 is in close contact with the contact glass surface of the upper surface of the apparatus main body 2 (closed position (see FIG. 9 )), The thickness of the mounting piece 81d is formed to be thick, the space portion is formed so that the plate member 85 does not abut against the support member 5, and the rear end portion of the mounting piece 81d facing the plate member 85 is formed to be curved to avoid obstruction of the plate member. 85 turns.

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

In addition, the plate member 85 may be divided into a plurality of pieces wider than the plate portions 73a of the first and second embodiments, used as a plurality of wide plate portions, and may be connected to each other in a unidirectional bendable manner by a connecting member.

In addition, in the case where the hand-pinch prevention mechanism 8 is provided, as shown in FIG. 16 , the mounting piece 53 and the blocking pieces 55 and 55 shown in the first and second embodiments may not be provided on the support member 5 . In this case, the upper plate 61 of the lift member 6 abuts against the upper plate 51 of the support member 5 .

The present invention as described in detail above has a simple structure and is suitable for use with a document platen opening and closing device having an elevating mechanism, especially in consideration of the safety of an office machine such as a photocopier, and a document platen opening and closing device using the document platen opening and closing device. office machine.

Claims (12)

1. An original pressing plate opening and closing device has: an installation member, installed on the device body side of the office machine with the original press plate; a support member pivotally supported on the mounting member via a first hinge shaft; and an elevating member, which overlaps the supporting member, is pivotally supported on the 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 press plate; Wherein, the original pressing plate opening and closing device includes an anti-pinch mechanism, which is arranged between the lifting member and the supporting member or the mounting member or the first hinge shaft. When the support member is rotated in the opposite direction, the space portion formed between the lift member and the support member is closed. 2. The device for opening and closing an original press platen according to claim 1, wherein the anti-pinch mechanism comprises: Bamboo curtain-like anti-pinch hand, formed to bend in one direction; and The first mounting portion is connected to the upper end portion of the anti-pinch hand portion, and is mounted on the lifting member. 3. The device for opening and closing an original press platen according to claim 2, wherein the anti-pinch hand part of the anti-pinch hand mechanism comprises: a plurality of plate portions in the form of strips of paper; and The connecting portion connects the plurality of plate portions in a bendable manner. 4 . The device for opening and closing an original press plate according to claim 3 , wherein an anti-bending protrusion is provided between the plurality of plate portions of the anti-pinch hand portion of the anti-pinch mechanism, and the The bending directions of the plurality of plate portions are limited to one direction. 5. The device for opening and closing the original press platen according to claim 4, wherein the anti-pinch mechanism comprises: The second connecting portion connects the anti-pinch hand portion and the first mounting portion. 6. The device for opening and closing a document pressing plate according to any one of claims 1 to 5, wherein the anti-pinch mechanism comprises: A second mounting portion is mounted on the support member, the mounting member, or the first hinge shaft that is continuous with the other end of the anti-pinch hand portion. 7. The device for opening and closing the original press platen according to claim 6, wherein the anti-pinch mechanism comprises: A third connecting portion connects the anti-pinch hand portion and the second mounting portion. 8 . The document pressing plate opening and closing device according to claim 2 , wherein the link portion controls the flexibility of the plurality of plate portions by changing the thickness thereof. 9 . 9 . The document pressing plate opening and closing device according to claim 1 , wherein the anti-pinch mechanism is composed of a flat plate member, and is configured such that the plate member is moved toward the elevating member via a rocking support portion. 10 . The rear end side is rotatable. 10 . The document pressing plate opening and closing device according to claim 9 , wherein the plate member is composed of a plurality of wide plate portions having a width wider than that of the plate portion according to claim 3 , and is configured to use 10 . The connecting parts can be bent to each other in one direction. 11. The document pressing plate opening and closing device according to claim 9, wherein the end portion of the plate member is rotatably mounted on the rear end portion side of the elevating member via the rocking support portion, and is restricted from being connected to the Rotation between the mounting members toward the space portion side. 12. An office machine using the document platen opening and closing device according to any one of claims 1 to 11.

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