JP7223400B2 - Document pressing plate opening/closing device and office equipment equipped with this document pressing plate opening/closing device - Google Patents

Description

The present invention relates to a document pressure plate opening/closing device provided in office equipment such as copiers, multi-function machines, printers, facsimiles, scanners, etc., and to office equipment provided with this document pressure plate opening/closing device.

Some business equipment bodies such as copiers, printers, facsimiles, scanners, etc. have an original pressing plate rotatably attached to the upper rear part of the apparatus body via an opening and closing device for the original pressing plate. . This document pressure plate opening/closing device is a kind of hinge mechanism, and the document pressure plate is supported so as to be rotatable around the hinge shaft, and the document pressure plate can be brought into close contact with the contact glass surface on the upper surface of the device main body. and the contact glass can be exposed. To set a document on the contact glass surface, the document pressure plate is rotated (opened and closed vertically) to expose (open) the contact glass surface, and the document is placed on the surface of the contact glass. After that, by closing the document pressing plate and pressing the document onto the contact glass surface, the document can be set on the contact glass surface.

A lift member and a compression coil spring are provided in such a document pressing plate opening/closing device so that the document can be brought into close contact with the contact glass regardless of thickness, and the original weight is reduced by the urging force of the compression coil spring. A manuscript pressing plate opening/closing device is known that can rotate the manuscript pressing plate without giving the user a feeling of pressure (see, for example, Japanese Unexamined Patent Application Publication No. 2002-100003).

The document pressing plate opening/closing device disclosed in Patent Document 1 includes a mounting member mounted on a main body of office equipment, a support member rotatably supported by the mounting member via a first hinge shaft, a lift member which overlaps with the support member and is rotatably supported by the free end of the support member via a second hinge shaft and which is attached to the document pressing plate; and between the lift member and the attachment member. A compression coil spring is provided to urge the lift member toward overlap with the support member.

As a result, when copying a thick original such as a book, after setting the thick original on the contact glass, rotating the original pressure plate in the closing direction will cause the original to close on the side of the original pressure plate opening/closing device. When the document pressure plate comes into contact with the end portion and further pushes the document pressure plate downward, the lift member is reversed with respect to the support member with the second hinge shaft as a fulcrum, and the document pressure plate is placed in a horizontal state with respect to the contact glass, It is configured so that a thick document can be crimped onto the contact glass, and outside light can be prevented from entering the interior of the office equipment through the contact glass.
Then, as shown in FIG. 17, a space is created between the rear portion of the lift member and the rear portion of the support member. The original pressing plate opening/closing device is constructed so that once a thick original is removed from the contact glass and opened in the opening direction, the lift member returns to its original position where it overlaps the support member, but the lift member remains inverted. When an attempt is made to close the document pressing plate in , the document pressing plate, that is, the lift member is closed without returning to its original position, and the document pressing plate is in a state in which its leading end side is lowered, and moreover, the rear portion of the lift member and the support member are separated from each other. It will be closed with a space between the rear parts. Even in this case, once the document pressure plate is opened, it can be returned to the original position where the lift member overlaps the support member. There is a case where the hand is put around the rear end of the lift member and pressed downward.
Then, there is a problem that a finger may be pinched in the space formed between the lift member and the support member and injured.

JP-A-11-95339

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a document pressure plate which can prevent the above-described accidents in the conventionally known document pressure plate opening/closing device. To provide an opening/closing device and office equipment equipped with the original pressing plate opening/closing device.

In order to achieve the above object, the invention of claim 1 of the present application provides a mounting member which is mounted on the main body side of office equipment having a document pressing plate, and a shaft which is rotatably supported by the mounting member via a first hinge shaft. and an original pressing plate which overlaps the supporting member and is rotatably supported on the free end side of the supporting member via a second hinge shaft in the direction opposite to the supporting member. and a lift member for closing a space formed between the lift member and the support member when the lift member rotates in the direction opposite to the support member. and a finger pinch prevention mechanism provided between the lift member and the support member or the mounting member or the first hinge shaft, the finger pinch prevention mechanism comprising a plurality of strip-shaped plate portions and these plate portions. Each plate has a finger-pinch preventing portion which is provided at both ends of each plate portion and which is connected to each other so as to be able to be bent only on one side. It is characterized in that it is attached to the lift member through a first attachment portion, and the other end portion of the finger pinch prevention portion is attached to the support member through a second attachment portion.

Next, according to claim 2 of the present application, there is provided an apparatus for opening and closing a document pressing plate, wherein the mechanism for preventing finger pinching is composed of a flat plate member, and this plate member is attached to the rear end side of the lift member. A regulating plate is mounted so as to be rotatable via a support portion, and the regulating plate abuts against the plate member when the lift member rotates to prevent the lift member from rotating toward the space portion. is provided .

According to a third aspect of the present invention, there is provided a business machine using the original pressing plate opening and closing device according to the first aspect.

Since the present invention is constructed as described above, even a thick original such as a book can be horizontally covered with the original pressing plate and pressed onto the contact glass, thereby preventing external light from entering the main body of the apparatus. To provide a highly safe document crimping plate capable of preventing as much as possible and preventing an accident in which a user's finger is caught in a space formed at each rear part of a lift member and a support member while obtaining such an effect. It is possible to provide an opening/closing device as well as office equipment using this original pressing plate opening/closing device.

1 is a side view showing an example of a document pressing plate opening/closing device of the present invention; FIG. FIG. 2 is a rear view showing an example of the document pressing plate opening/closing device of the present invention; BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows an example of the finger pinch prevention mechanism of the document pressure plate opening/closing apparatus based on this invention, (a) is a perspective view, (b) is a side view and its partially enlarged view. FIG. 10 is a side view showing the operation of the finger pinch prevention mechanism when the lift member of the document pressure plate opening/closing device of the present invention is reversed with respect to the support member; FIG. 5 is a rear view of the document pressing plate opening/closing device shown in FIG. 4; FIG. 2 is a side view showing the fully open state of the document pressing plate opening/closing device of the present invention; FIG. 11 illustrates a state in which the finger pinch prevention mechanism of the document pressing plate opening/closing device of the present invention does not bend inward and is kept in a slightly curved state; It is a partially enlarged view. FIG. 10 is a side view showing another embodiment of the document pressing plate opening/closing device of the present invention; FIG. 11 is a side view showing still another embodiment of the document pressing plate opening/closing device of the present invention; FIG. 10 is a rear view of the document pressing plate opening/closing device shown in FIG. 9; FIG. 10 is an enlarged exploded perspective view of a finger pinch prevention mechanism of the document pressing plate opening/closing device shown in FIG. 9; FIG. 10 is a side view for explaining the operation of the finger pinch prevention mechanism of the document pressing plate opening/closing device shown in FIG. 9; FIG. 13 is a rear view of the document pressing plate opening/closing device shown in FIG. 12; FIG. 10 is a side view showing a fully opened state of the document pressing plate opening/closing device shown in FIG. 9; FIG. 10 is an enlarged cross-sectional view taken along the line AA of the connecting portion between the plate member and the swing support portion of the finger pinch prevention mechanism of the document pressing plate opening/closing device shown in FIG. 9; FIG. 14B shows the state when the members are in operation, and FIG. 14B shows the state when the original pressing plate is opened to the maximum angle. FIG. 11 is a side view showing still another embodiment of the document pressing plate opening/closing device of the present invention; 1 is a side view of a conventionally known document pressing plate opening/closing device; FIG.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the document pressing plate opening/closing device of the present invention and office equipment using this document pressing plate opening/closing device will be described below in detail with reference to the accompanying drawings.

1 to 7 are diagrams showing an example of an original pressing plate opening/closing device according to a first embodiment of the present invention and an example of office equipment using this original pressing plate opening/closing device. The document pressing plate opening/closing device 1 of the present invention is a type of hinge device for attaching the document pressing plate 3 to the upper surface of the device main body 2 of business equipment such as copiers, printers, facsimiles, and scanners so that it can be opened and closed.
As shown in the drawings, the document pressing plate opening/closing device 1 according to the present invention includes a mounting member 4 mounted on the apparatus main body 2 and both side plates 42 of the mounting member 4 rotating via a first hinge shaft 11. A support member 5 that is freely connected, and a lift member 6 that mounts the document pressing plate 3 while being rotatably connected to both side plates 52, 52 of the support member 5 via a second hinge shaft 12. The supporting member 5 rotates from the closed position in which the document pressure plate 3 is in contact with the upper surface of the apparatus body 2 to the maximum use open position during normal use, and the support member 5 is further moved to the maximum use position during maintenance. It rotates from the open position to the maximum open position. A feature of the document pressing plate opening/closing device 1 of the present invention is that a space R formed when the lift member 6 rotates about the second hinge shaft 12 inserted through the support member 5 allows a person's finger to be placed in the space R. A finger pinch prevention mechanism 7 is provided to prevent the finger from entering. Although the first hinge shaft 11 and the second hinge shaft 12 are shown as one in the drawing, they are divided into two side plates 42, 42 of the mounting member 4, two side plates 52 of the support member 5, 52, and the side plates 52, 52 of the support member 5 and the side plates 62, 62 of the lift member 6 may be separately pivoted. When referring to the first hinge shaft 11 and the second hinge shaft 12 in the present invention, these shafts are included.

As shown in FIG. 1, the mounting member 4 includes a bottom plate 41 mounted on the rear upper end side of the device main body 2, and a direction orthogonal to the bottom plate 41 from both side ends of the bottom plate 41 (including substantially orthogonal directions). and a substantially rectangular attachment piece 43 extending from one end (rear end) of the bottom plate 41 in a direction orthogonal (including a substantially orthogonal direction) to the bottom plate 41. ing.

The bottom plate 41 is formed in a substantially rectangular shape, and is provided with attachment holes (not shown) for attachment to the apparatus main body 2 with bisbols, bolts, or the like. Both side plates 42, 42 are formed to have a substantially L-shaped cross section, and a first hinge shaft hole 46 is formed at the tip (upper portion) of a mounting piece 42a extending in a direction orthogonal (including a substantially orthogonal direction) to the bottom plate 41. is provided. A pressure-receiving member hole 47 is provided in the mounting piece 42a at a position closer to the bottom plate 41 (below) than the first hinge shaft hole 46 and biased inward (forward). The pressure receiving member 13 is inserted through the pressure receiving member hole 47 of both mounting pieces 42a. The pressure-receiving member 13 does not have to be pin-shaped, and a curved member or a member made of resin may be attached between the side plates 42 , 42 .

The support member 5 includes an upper plate 51 and both side plates 42 of the mounting member 4 from both side ends of the upper plate 51 along the direction in which a pair of sliders 31 and 32 (to be described later) slide. Both side plates 52, 52 extending in a direction perpendicular (including a substantially perpendicular direction) to the upper plate 51 so as to cover the upper plate 51, and a support formed by bending the tip portions of the both side plates 52, 52 to the sides facing each other by 90°. Holding pieces 54 , 54 are provided, and stopper pieces 55 , 55 are provided upward from the side plates 52 , 52 . The stopper pieces 55, 55 may be omitted when the second attachment portion 72 is attached to the lower surface side of the upper plate 61 of the lift member 6 in some cases.

A second hinge shaft hole (not shown) through which the second hinge shaft 12 is inserted is provided at one end (front end) of each of the side plates 52, 52, and a notch portion into which an operating member 14 described later is inserted. 56, 56 (illustration of one is omitted) are provided. A first hinge shaft insertion hole (not shown) is provided at the other end (rear end) of each of the side plates 52 , 52 . The first hinge shaft insertion holes of the side plates 52, 52 and the first hinge shaft hole 46 of the mounting member 4 are axially aligned, and the first hinge shaft 11 is inserted through these holes, whereby the support member 5 is attached to the mounting member. 4 is rotatably connected with the first hinge shaft 11 as an axis.

A pair of sliders 31 and 32 are fitted in the support member 5 . The pair of sliders 31 and 32 has closing surfaces 31a and 32a which are bottom surfaces, and is formed in a bottomed cylinder shape with a rectangular cross section. The pair of sliders 31 and 32 are individually slidably fitted in the support member 5 so that the openings face each other, and the compression coil spring 21 is resiliently installed in the pair of sliders 31 and 32. ing. That is, the concave insides of the sliders 31 and 32 are formed as spring housing portions 31c and 32c for housing the compression coil springs 21 therein. The compression coil springs 21 may be one or two or more. For example, two compression coil springs 21 may be provided in parallel or superimposed to urge the pair of sliders 31 and 32 in directions away from each other.

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 pressure plate opening/closing device 1 of the present invention is mounted on a copier or the like), the pair of sliders 31 and 32 are 3, it is formed with a length to be fitted in the support member 5 when the document pressing plate 3 is brought into close contact with the contact glass surface of the upper surface of the apparatus main body 2 (when the document pressing plate is in close contact).

The slider (first slider) 31 on the distal end side has a closed surface 31a, which is the bottom surface thereof, and has a flat outer surface. The closed surface 31a presses the operating member 14 by the biasing force of the compression coil spring 21, so that the support member 5 and the lift member 6 overlap each other. In this case, the portion where the lift member 6 is connected to the support member 5 by the second hinge shaft 12 is moved upward compared to the conventionally known one, and the lower surface side of the upper plate 61 of the lift member 6 is arranged on both sides of the support member 5 . A gap is formed between the upper plate 51 of the support member 5 and the upper plate 61 of the lift member 6 so as to abut on the stopper pieces 55, 55 projecting upward from the plates 52, 52. It is configured so that the lift member 6 does not tilt with respect to the support member 5 by contacting the second mounting portion 72 on the rear end side of the upper plate 61 .

The lift member 6 includes an upper plate 61 attached to the rear end side of the document pressing plate 3 with screws or the like, and a direction perpendicular to the upper plate 61 from both ends of the upper plate 61 (including a substantially perpendicular direction). A mounting piece 63 is formed by bending 90° from one end (rear end) of the upper plate 61 to the side opposite to the side plates 62 , 62 . A second hinge shaft insertion hole (not shown) is provided on the tip side of both side plates 62, 62 of the lift member 6, and the operating member 14 is inserted below the second hinge shaft insertion hole. Actuation member apertures (not shown) are provided. The operating member 14 is inserted through the operating member holes of the side plates 62, 62 and fixed. The second hinge shaft insertion holes of the side plates 62, 62 of the lift member 6 are aligned with the second hinge shaft holes of the side plates 52, 52 of the support member 5, and the second hinge shaft 12 is inserted through these holes. Thus, the lift member 6 and the support member 5 are rotatably connected to each other about the second hinge shaft 12 . Although the actuating member 14 is shown as a single pin or shaft, it is also possible to use another type of actuating member 14 or a member protruding integrally or separately from the tip side of the lift member 6. good. The actuating member 14 shall also include this.

The finger pinch prevention mechanism 7 of the first embodiment provided between the rear end portion of the support member 5 and the rear end portion of the lift member 6 includes, as shown in FIG. A first attachment portion 71 attached to the rear end portion of the lift member 6 connected to the upper end of the prevention portion 73, and a second attachment portion attached to the rear end portion of the support member 5 connected to the lower end of the finger pinch prevention portion 73. The finger pinch prevention portion 73, the first attachment portion 71, and the second attachment portion 72 are integrally molded of thermoplastic resin so as to bend in one direction. The finger pinch prevention portion 73 includes a plurality of elongated strip-shaped plate portions 73a, 73a . Each of the plate portions 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 finger pinch prevention portion 73 can be bent without the first connecting portion 73e entering the space R, and the distance between the first mounting portion 71 and the second mounting portion 72 caused by the rotation of the lift member 6 is reduced. (see FIGS. 1 and 4).

In each of the plate portions 73a, 73a, . The protrusions 73d, 73d, . As a result, even if the user attempts to push the finger pinch prevention portion 73 into the space R, the finger pinch prevention portion 73 is pushed into the space R by the contact between the bending prevention protrusions 73d. can be prevented.

Furthermore, the uppermost plate portion 73 a that constitutes the finger pinch prevention portion 73 is connected to the first attachment portion 71 by a second connection portion 74 . The first mounting portion 71 extends horizontally from the front end side to the rear end side of the lift member 6, and has a fixing plate 71a formed with a mounting hole 71f for mounting to the upper plate 61 of the lift member 6 with a screw or the like. A front plate 71b extending from the tip of the plate 71a in a direction orthogonal (including a substantially orthogonal direction) to the fixed plate 71a, and a direction orthogonal (also substantially orthogonal) to the front plate 71b from the tip of the front plate 71b. and a top plate 71c extending in a direction away from the fixed plate 71a, and a top plate 71c extending from the tip of the top plate 71c in a direction perpendicular to the top plate 71c (including a direction substantially perpendicular to the top plate 71c) and facing the front plate 71b. and an extending attachment piece 71d. The front plate 71b, the top plate 71c, and the attachment piece 71d are formed to have substantially the same width as the upper plate 61 of the lift member 6, thereby forming a first attachment groove 71g into which the attachment piece 63 of the lift member 6 is inserted. formed. In the first mounting portion 71, the mounting piece 63 is inserted into the first mounting groove 71g with the fixed plate 71a arranged closer to the rear end portion of the lift member 6 (upper plate 61) than the front plate 71b. .

The mounting piece 71d is connected to the plate portion 73a by the second connecting portion 74 at its tip. Specifically, the second connecting portion 74 connects the outer edge 71e, which is the edge opposite to the inner edge forming the first mounting groove 71g at the tip of the mounting piece 71d, and the plate portion 73a. As a result, the rotation angle of the plate portion 73a connected to the mounting piece 71d can be increased, and the plate portion 73a moves closer to the first mounting portion 71 and the second mounting portion 72 due to the rotation of the lift member 6. When the first mounting portion 71 and the second mounting portion 72 are separated from each other, the second mounting portion 71 and the second mounting portion 72 rotate toward the second mounting portion 72 side (downward). can. The second connecting portion 74 may connect the mounting piece 71d and the side surface of the plate portion 73a, but it is preferable to connect the edge of the surface 73c of the plate portion 73a. As a result, the load on the second connecting portion 74 can be reduced when the finger pinch preventing portion 73 is pushed into the space R side by the user. In order to improve the fatigue limit, the second connecting portion 74 may be formed such that the distance between the mounting piece 71d and the plate portion 73a is longer than the distance between the plate portions 73a.

Also, the lowermost plate portion 73 a and the second mounting portion 72 are connected by a third connecting portion 75 . Like the first mounting portion 71, the second mounting portion 72 extends horizontally from the front end side to the rear end side of the support member 5, and has mounting holes 72f for mounting to the upper plate 51 of the support member 5 with screws or the like. A fixed plate 72a formed, a front plate 72b extending from the tip of the fixed plate 72a in a direction (including a substantially perpendicular direction) to the fixed plate 72a, and a front plate 72b extending from the tip of the front plate 72b to the front plate 72b A top plate 72c extending in a direction orthogonal (including a substantially orthogonal direction) and in a direction away from the fixed plate 72a, and a direction orthogonal (including a substantially orthogonal direction) to the top plate 72c from the tip of the top plate 72c. and a mounting piece 72d extending so as to face the front plate 72b. A second mounting groove 72g into which the mounting piece 53 of the support member 5 is inserted is formed through the front plate 72b, the top plate 72c, and the mounting piece 72d. In the second mounting portion 72, the mounting piece 53 is inserted into the second mounting groove 72g with the fixing plate 72a positioned closer to the rear end of the support member 5 (upper plate 51) than the front plate 72b.

The mounting piece 72d is connected to the plate portion 73a by a third connecting portion 75 at its rear end. Specifically, the third connecting portion 75 connects the edge 72e at the rear end of the mounting piece 72d and the plate portion 73a. As a result, the rotation angle of the plate portion 73a connected to the mounting piece 72d can be increased. When the first mounting portion 71 and the second mounting portion 72 are separated, the first mounting portion 71 and the second mounting portion 72 can be turned toward the first mounting portion 71 (upward). . Although the attachment piece 72d and the side surface of the plate portion 73a may be connected by the third connection portion 75, it is preferable to connect the edge of the surface 73b of the plate portion 73a. As a result, the burden on the third connecting portion 75 can be reduced when the user pushes the finger pinch prevention portion 73 toward the space portion R side. Similarly to the second connecting portion 74, the third connecting portion 75 is also designed such that the distance between the mounting piece 72d and the plate portion 73a is longer than the distance between the plate portions 73a in order to improve the fatigue limit. may be formed in

The document pressing plate opening/closing device 1 of the present embodiment can stably bring the document into close contact with the upper surface of the apparatus main body 2 regardless of the thickness of the document. By attaching the support member 5 to the document pressing plate 3 via a lift member 6, which will be described later, it is possible to prevent external light from entering the inside of the apparatus main body and hindering exposure as much as possible. Furthermore, the finger pinch prevention mechanism 7 can prevent a person from inserting his/her finger or the like into the space R formed at the rear portion of each of the lift member 6 and the support member 5 at the time of starting the lift and being pinched. .

That is, the lower surface of the upper plate 61 of the lift member 6 contacts the stopper pieces 55, 55 of the support member 5 due to the biasing force of the compression coil spring 21, and the upper plate 51 of the support member 5 and the upper plate 61 of the lift member 6 are brought into contact with each other. are substantially parallel and close to each other, the rear end of the lift member 6 does not rotate downward. For this reason, when the manuscript pressure plate 3 is lifted and the manuscript is placed on the contact glass surface of the upper surface of the apparatus body 2, the end of the manuscript pressure plate 3 opposite to the place where the lift member 6 is attached is normally placed. Alternatively, when the manuscript pressing plate 3 is lifted by holding a grip provided in the vicinity thereof, the manuscript pressing plate 3 rotates only about the first hinge shaft 11, exposing the contact glass surface to the outside. . A document is placed on the exposed surface of the contact glass.

When the lifted document pressure plate 3 is lowered after placement, the document pressure plate 3 rotates about the first hinge shaft 11 (moves downward) in the direction of contact with the surface of the contact glass. At this time, the upper plate 61 of the lift member 6 remains in contact with the stopper pieces 55, 55 of the support member 5 due to the biasing force of the compression coil spring 21, that is, the document pressing plate 3 (lift member 6) is moved to the second position. The document pressing plate 3 rotates without rotating around the hinge shaft 12 .

At this time, if the document placed on the contact glass surface is thin like paper, the document pressing plate 3 makes surface contact with the paper. As a result, the entire document comes into contact with the document pressing plate 3 and is pressed against the contact glass surface, so that the document is stably brought into close contact with the contact glass surface.

On the other hand, when the document 90 is thick like a book as shown in FIG. Alternatively, a portion of the document pressing plate 3 in the vicinity of the supporting member 5 is in contact with the vicinity thereof, and a space is formed between the document pressing plate 3 and the end of the document 90 opposite to the supporting member 5 side. It is formed. That is, the document pressing plate 3 at the end on the gripping portion side is in a floating state. When the floating document pressure plate 3 is pressed toward the contact glass surface, for example, near the end on the side of the gripping portion, the operating member 14 presses the first slider 31 toward the second slider 32 and the compression coil spring 21 is attached. The first slider 31 moves toward the second slider 32 against the force, and the document pressing plate 3 (lift member 6) rotates about the second hinge shaft 12 as an axis. That is, the document pressing plate 3 moves so as to cover the upper portion of the document 90 . For example, when the upper portion of the document 90 is flat, the document pressing plate 3 comes into surface contact with this upper portion. Therefore, a thick document 90 such as a book is stably brought into close contact with the surface of the contact glass. When the lift member 6 rotates around 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, as shown in FIG. If the finger pinch prevention mechanism 7 is not provided as shown in 17, there is a risk that a person's finger or the like may enter this space R, but this space R is shielded by the finger pinch prevention mechanism 7. Thus, it is possible to prevent a person's finger or the like from entering the space R. Both ends of the finger pinch prevention portion 73 of the finger pinch prevention mechanism 7 are rotatably attached within a predetermined range, so that the support member 5 can be rotated from the maximum open position to the maximum open position. It is possible to prevent the finger pinch prevention portion 73 from hindering the rotation of the support member 5 when the user is moving.

Therefore, the document pressing plate opening/closing device 1 of the present invention can stably bring the document into close contact with the upper surface of the device main body 2 regardless of the thickness, and while obtaining such effects, the user can safely press the document. can be used.

Although the second attachment portion 72 is attached to the support member 5 in Embodiment 1, 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 . Alternatively, the second attachment portion 72 may be omitted. Even in this case, it is possible to prevent a person's finger or the like from entering the space R by the finger pinch prevention portion 73 .

Further, in the first embodiment, a second connecting portion 74 between the first attachment portion 71 and the finger pinch prevention portion 73 constituting the finger pinch prevention mechanism 7 and between the second attachment portion 72 and the finger pinch prevention portion 73 The third connecting portion 75 is formed thicker than the first connecting portion 73e between the plate portions 73a, 73a, . As a result, the portion of the connecting portion that is formed thick is less likely to bend. Therefore, when the document pressing plate 3 is in the closed position in contact with the upper surface of the apparatus main body 2, the finger pinch preventing portion 73 is bent by the first connecting portion 73e, and the bending angle can be adjusted. Therefore, the load on the first connecting portion 73e can be reduced.
However, in this configuration, the thickness of all the connecting portions may be the same as that of the other connecting portions.

FIG. 8 shows a second embodiment of the document pressing plate opening/closing device according to the present invention. The document pressure plate opening/closing device 1A according to the second embodiment differs from the document pressure plate opening/closing device 1 according to the first embodiment in that the finger pinch prevention portion 73 of the finger pinch prevention mechanism 7 of the second embodiment is replaced by the first connecting portion. The point is that not only 73e but also a shape adjusting connecting portion 73g is provided. Since other constituent elements are the same as those of the first embodiment, they are denoted by the same reference symbols as those of the first embodiment, and the description thereof is omitted.

The shape adjusting connecting portion 73g replaces a part of the first connecting portion 73e, the second connecting portion 74, or the third connecting portion 75, and the plate portions 73a, the plate portion 73a and the first mounting portion 71, or the like. It is used to connect the second mounting portion 72, and has the same flexibility as the first connecting portion 73e, but is formed thicker than the first connecting portion 73e. Therefore, the shape adjusting connection portion 73g is less likely to bend than the first connection portion 73e, and the finger pinch prevention portion 73 can be bent when the distance between the first attachment portion 71 and the second attachment portion 72 is shortened. can change the shape of In other words, it is possible to prevent the finger pinch prevention portion 73 from protruding toward the rear end side.

9 to 15 show Embodiment 3 of the original pressing plate opening/closing device according to the present invention. The document pressure plate opening/closing device 1B according to the third embodiment differs from the document pressure plate opening/closing devices 1 and 1A according to the first and second embodiments in that the finger pinch prevention mechanism of the document pressure plate opening/closing device 1B of the third embodiment is provided. The point 8 is that the diaphragm-shaped finger pinch prevention part of the first and second embodiments is constituted by a single flat plate member 85 . The structure of the finger pinch prevention mechanism 8 other than the plate member 85 and the swing support portion 81 is the same as that of the first and second embodiments, so the same reference symbols are given and the description thereof is omitted. Also, the support member 5 does not have the attachment piece 53 shown in the first and second embodiments.

The finger pinch prevention mechanism 8 according to the third embodiment comprises a flat plate member 85 and a swing support portion 81 that supports the plate member 85 so as to swing in one direction with respect to the lift member 6. Support plates 85b and 85b having projections 85c and 85c provided inside are provided on both sides of the upper end portion of the plate member 85. As shown in FIG. The rocking support portion 81 extends horizontally from the front end side to the rear end side of the lift member 6, and has a fixing plate 81a formed with a mounting hole 81f for mounting to the upper plate 61 of the lift member 6 with a screw or the like. A front plate 81b extending from the tip of the plate 81a in a direction orthogonal (including a substantially orthogonal direction) to the fixed plate 81a, and a direction orthogonal to the front plate 81b from the tip of the front plate 81b (a direction substantially orthogonal to the fixing plate 81a is also included). and a top plate 81c extending in a direction away from the fixed plate 81a, and a top plate 81c extending from the tip of the top plate 81c in a direction perpendicular to the top plate 81c (including a direction substantially perpendicular to the top plate 81c) and facing the front plate 81b. It is formed of an extending attachment piece 81d and a regulation plate 81e extending in the same straight line from the tip of the attachment piece 81d. A third attachment groove 82 into which the attachment piece 63 of the lift member 6 is inserted is formed through the front plate 81b, the top plate 81c, and the attachment piece 81d. In the rocking support portion 81, a mounting piece 63 is inserted into the third mounting groove 82 with the fixed plate 81a arranged closer to the rear end portion of the lift member 6 (upper plate 61) than the front plate 81b. .

The mounting piece 81d has recesses 81g formed on both sides thereof into which the protrusions 85c are fitted, and the original pressing plate 3 is in close contact with the contact glass surface on the upper surface of the apparatus main body 2 (closed position (see FIG. 9)). ), the plate member 85 is formed thick so that a space is formed to such an extent that the plate member 85 does not contact the support member 5, and faces the plate member 85 at the rear end portion of the mounting piece 81d. The surface is curved so as not to hinder the rotation of the plate member 85 .

The regulating plate 81e is formed thick enough to abut against the plate member 85 when the plate member 85 is pushed toward the space R, thereby regulating the rotation thereof.

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

Further, when the finger pinch prevention mechanism 8 is provided, the mounting piece 53 and the stopper pieces 55, 55 shown in the first and second embodiments may be omitted from the supporting member 5 as shown in FIG. In this case, the upper plate 61 of the lift member 6 comes into contact with the upper plate 51 of the support member 5 .

As described in detail above, the present invention provides a document pressure contact opening/closing device which has a simple structure and takes into consideration the safety of office equipment such as a copying machine, in particular, which has a lift mechanism, and an office work using this document pressure contact plate opening/closing device. It is suitable for use as a device.

REFERENCE SIGNS LIST 1 document pressing plate opening/closing device 2 apparatus main body 3 document pressing plate 4 attachment member 5 support member 6 lift member 7 finger pinch prevention mechanism 8 finger pinch prevention mechanism 85 plate portion 11 first hinge shaft 12 second hinge shaft 13 cam pin 14 operating member 21 compression coil spring 31 first slider 32 second slider

Claims (3)

A mounting member mounted on the main body side of office equipment having a document pressing plate, a supporting member rotatably supported by the mounting member via a first hinge shaft, and the supporting member overlapped with the supporting member. a lift member attached to the document pressure plate which is rotatably supported in the opposite direction to the support member via a second hinge shaft on the free end side of the document pressure plate opening/closing device, wherein: In order to block a space formed between the lift member and the support member when the lift member rotates in the opposite direction to the support member, the lift member and the support member, the attachment member, or the second 1 hinge shaft and a finger pinch prevention mechanism provided between a plurality of strip-shaped plate portions and both side end portions of each plate portion, and the finger pinch prevention mechanism is provided on one side of each plate portion. a finger-pinch preventing portion composed of a bend-preventing projection connected only to one side thereof so as to be able to be bent; A document pressing plate opening/closing device , wherein the other end of the prevention portion is attached to the support member via a second attachment portion . The finger pinch prevention mechanism is composed of a flat plate member, which is attached so as to be rotatable via a swing support portion attached to the rear end side of the lift member. 2. The document pressing apparatus according to claim 1, wherein the supporting portion is provided with a regulating plate that abuts against the plate member when the lift member rotates to prevent the lift member from rotating toward the space. Plate opener. 2. An office equipment using the original pressing plate opening/closing device according to claim 1 .

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