JP2787988B2 - Document cover - Google Patents

Description

The present invention relates to a document cover of an image processing apparatus such as an electrostatographic copying machine and a laser beam printer. More specifically, the present invention relates to a document cover provided on the document cover. The present invention relates to an improvement of a document cover in which a document cover is attached to and detached from the apparatus main body by attaching and detaching a rotation support arm to and from the apparatus main body.

(Prior Art) Generally, in an electrostatographic copying machine, an exposure step of irradiating a copy original with light at the time of image formation is performed. In order to perform this exposure process well, the original placed on the original placing plate (hereinafter, referred to as contact glass) on the upper surface of the apparatus body is uniformly pressed against the contact glass over the entire surface to uniformly irradiate light. For this purpose, various document pressing covers having a document pressing member for pressing a document have been proposed for this purpose.

By the way, in the document cover, the document pressing member for pressing the document becomes dirty due to long-time use, and if used as it is, it adversely affects the image. Therefore, it is necessary to appropriately replace the document pressing member. There is a document cover in which the document cover is configured to be detachable from the apparatus main body in consideration of the points.

As shown in FIGS. 7 and 8, this type of document cover has a rotation supporting arm attached to the document cover 4 in that the document cover 4 can be easily and quickly attached to and detached from the apparatus main body 1. The document cover 4 is configured so that the document cover 4 can be detachably attached to the apparatus main body 1 by detachably attaching the free end of the rotation support arm 10 to the locking groove 3 of the apparatus main body 1. Widely used for practical use.

The document cover 4 will be described in detail. The document cover 4 has flexibility and a document pressing member 7 for pressing the document P, and a document cover for detachably attaching the document pressing member 7 with screws 9. 4 provided rotatably by a main body 8 and a rotation shaft 11 at one end of the document cover main body 8
And one rotation support arm 10.

The rotation supporting arm 10 is in a first state A in a state of standing substantially perpendicularly to the document cover 4 as shown by a solid line in FIG.
And a second state B substantially horizontal with respect to the document cover 4 as shown by a dashed line in FIG. The document holding member 7 has locking holes 12 as cover body locking portions at at least four places (here, four corners) so that the document holding member 7 is securely fixed in a state of being attached to the document cover body 8. It is provided and is screwed to the document cover body 8. The document pressing member 7 includes a document mat 6 having a white color and contacting the document P, and an elastic pressing member 5 for pressing the document mat 6 against the document P on the contact glass 2. I have.

Subsequently, the operation of the document cover 4 having the above configuration will be described. As shown by a dashed line in FIG. 7, the document cover 4 is attached to and detached from the apparatus main body 1 when the rotation support arm 10 takes the second state B. When the document P is pressed, the document cover 4 is pushed down to the contact glass 2 side of the apparatus main body 1 in the second state B, so that the rotation supporting arm 10 locked in the locking groove 3 of the apparatus main body 1 is pressed. Document cover 4
Rotates in the clockwise direction in the figure, and when the rotation support arm 10 takes the first state A, the document cover 4 is closed, and the document pressing member 7 of the document cover 4 is moved to the document P on the contact glass 2. Press. (See the two-dot chain line in FIG. 7.) On the other hand, when releasing the pressing of the document P, the document cover 4 is rotated counterclockwise in FIG. The document cover 4 assumes the second state B. At this time, the document cover 4 is opened and, at the same time, the document cover 4 becomes detachable.

However, according to the document cover 4 described above, when the document pressing member 7 is replaced, the document cover 4 is first removed from the apparatus main body 1, and then the document pressing member 7 is removed from the document cover 4. At this time, the document pressing member 7 has to be removed from the document cover 4 by removing the screws 9 attached to the four locking holes 12, and the replacement work is troublesome.

Here, it is conceivable to change the locking means to a one-touch detachable means such as a hook-and-loop fastener (trade name “Magic Tape”), for example, by changing a troublesome screwing means such as a screw 9. With this configuration, the attaching / detaching operation of the locking means at each location can be performed easily and quickly. However, the attaching / detaching operation of the original pressing member 7 to / from the original cover 4 is provided at least at four locations. The fundamental problem that must be performed for the locking hole 12 that has been left has not been solved yet.

That is, in the document cover 4 having the rotation support arm 10 as described above, although the document cover 4 can be easily and quickly attached to and detached from the apparatus main body 1, the attachment / detachment of the document pressing member 7 is 4 times. Since the locking portion is provided at the position, the attachment / detachment of the document holding member 7 to / from the document cover 4 is not easy and quick at all, and it cannot be said that the features are fully utilized.

In addition, since it is configured to be locked at four places, it is undeniable that the number of parts increases.

As a result of intensive studies, the present inventors have found that in the document cover 4 having the above-described rotating support arm 10, it is not necessary to lock all four positions of the document pressing member 7, and the document pressing member 7 It has been found that it is sufficient to hold the rotation support arm side part of the rotation support arm 10 loosely inserted therein. The reason is that when the document cover 4 is attached to the apparatus main body 1, the document holding member 7 is detached from the rotation support arm 10 because the rotation support arm 10 is locked in the locking groove 3. This is because there is no fear.

That is, the present invention has been made in consideration of the above-described problems and the results of the above-mentioned earnest study, and in a document cover in a form that allows easy and quick attachment and detachment of the document cover to the apparatus main body, It focuses on the pivotal support arm that is a feature of this.

An object of the document cover according to the first invention is to use a document that uses a rotating support arm as a means for attaching and detaching the document cover to and from the apparatus main body and at the same time as a holding means for holding a document pressing member in a loosely inserted state. By providing the cover, the features of the original cover of this mode can be fully exhibited, the attachment and detachment of the original pressing member can be made easier and faster, and the number of parts for attaching the original pressing member to the original cover can be reduced. .

Further, the purpose of the document cover of the second invention is that, in the document cover of the first invention, the document pressing member is held in a state of being loosely inserted into the rotation support arm, so that, for example, This is made in consideration of the possibility that the document pressing member may be detached from the document cover when the document pressing member is mounted on the apparatus main body. An object of the present invention is to provide a document cover used as a retaining means, in addition to the object of the first invention, to prevent the document pressing member from being detached from the document cover at the time of mounting.

(Means for Solving the Problems) A document cover according to a first aspect of the present invention has a document holding member having flexibility and for pressing a document, and a document cover body for detachably attaching the document holding member. A document cover having a pivot support arm rotatably provided at one end of the document cover main body and having a free end detachably attached to the apparatus main body, wherein the document pressing member is A cover main body removably attached to the document cover main body, and a support arm holding through hole removably loosely inserted into the rotation support arm.

Further, a document cover according to a second aspect of the present invention includes a document pressing member having flexibility and pressing a document, a document cover body for detachably attaching the document pressing member, and one end of the document cover body. A document cover having a rotatable support arm rotatably mounted on the document body and having a free end detachably mounted on the apparatus body, wherein the document pressing member is detachably attached to the document cover body. A cover body locking portion to be attached; and a support arm holding through hole removably loosely inserted into the rotation support arm. When the rotation support arm is attached to or detached from the apparatus main body, the rotation support arm holds the original. The support arm holding through-hole of the holding member is configured to serve as a retaining means for preventing the through hole for removal from the rotation support arm.

(Operation) According to the document cover of the first invention, when the document pressing member is attached to the document cover, the cover main body locking portion of the document pressing member is locked to the document cover main body and the document pressing member is supported. This is performed by loosely inserting the through hole for holding the arm into the rotation support arm. The document holding member can be removed from the document cover by removing the cover holding portion of the document holding member from the document cover body and pulling out the supporting arm holding through hole of the document holding member from the rotating support arm. Will be

At this time, the work of attaching and detaching the document pressing member to and from the rotation supporting arm is performed only by loosely inserting and removing the through hole provided in the document pressing member from the rotation supporting arm. According to the document cover of the second invention, in addition to the function of the document cover of the first invention, when the document cover is attached to or detached from the apparatus main body, the rotation support arm is a through-hole for holding the support arm of the document pressing member. Is prevented from being detached from the rotation support arm.

(Embodiment) First, an embodiment of the document cover of the first invention will be described with reference to FIGS. 1 and 2. FIG.

FIG. 1 is a sectional view showing an embodiment of the original cover of the first invention, and FIG. 2 is a perspective view showing an embodiment of the original cover of the first invention.

In the drawings, the same components as those of the conventional document cover are denoted by the same reference numerals, and the details will be omitted.

The document cover of the first invention can be briefly described as follows.
It is characterized in that the rotation support arm is used as a means for attaching and detaching the document cover to and from the apparatus main body, and at the same time, is used as a holding means for holding the support arm holding through hole of the document pressing member in a loosely inserted state.

 Hereinafter, only the main parts will be described.

In the drawing, reference numeral 7 denotes a document pressing member, which has a document mat 6 and an elastic pressing member 5. At this time, the document mat 6 is formed to be longer than before so that one end of the document mat 6 reaches the free end of the rotating support arm 10 located in the second state B. Is a rectangular support arm holding through hole 20 slightly larger than the cross-sectional shape of the rotation support arm 10.
Is provided.

According to the original cover 4 based on the above-described configuration, the attachment of the original pressing member 7 to the original cover 4 is performed by first setting the cover body of the original pressing member 7 as shown by a dashed line in FIG. The locking hole 12 is locked to the document cover main body 8 by screwing, and then the supporting arm holding through hole 20 of the document mat 6 is set to the second state B as shown by a two-dot chain line in FIG. This is performed by loosely inserting the support arm 10. At this time,
The procedure for attaching the document holding member 7 to the document cover 4 is reversed from the procedure described above, that is, the support arm holding through hole 20 of the document mat 6 is loosely inserted into the rotary support arm 10 in the second state B,
Next, the cover body locking hole 12 of the document pressing member 7 may be locked to the document cover body 8 by screwing. On the other hand, removal of the document pressing member 7 from the document cover 4 may be performed in a procedure reverse to the above-described mounting procedure.

Thus, as a mechanism for attaching and detaching the document pressing member 7 to and from the document cover 4, two of the four conventional locking holes are used.
Since only the through hole 20 for holding the supporting arm is provided in the document mat 6 instead of the 12 and the two screws 9, the configuration is further simplified. The original cover 4 of the original pressing member 7
The work of attaching / detaching to / from the document holder is merely a loose insertion / removal of the support arm holding through-hole 20 of the document mat 6 from the rotation support arm 10 instead of locking of the document holding member 7 at two places as in the conventional case. Workability is improved. At this time, the support arm holding through hole 20
May of course be other shapes such as a circle. Further, the support arm holding through-hole 20 is provided only in the original mat 6, but the elastic pressing member 5 is also formed to have the same size as the original mat 6, and the elastic pressing member 5 is also provided with the supporting arm holding hole. The through hole 20 may be provided, or only the elastic pressing member 5 may be formed to be extended, and the supporting arm holding through hole 20 may be provided only in the elastic pressing member.

Further, the original cover 4 can be attached to the apparatus main body while the original pressing member 7 is attached to the original cover 4.

Here, the pressing action of the document P by the document cover 4 mounted on the apparatus main body 1 will be described with reference to FIG. In order to press the document P on the contact glass 2, the document cover 4 is gradually pushed down as shown by a two-dot chain line.
Then, as shown by an arrow C, the document pressing member 7 is not securely fixed to the document cover 4, and one end of the document mat 6 is loosely inserted into the rotation support arm 10 to take a free state. Therefore, the document pressing member 7 is gradually bent from the side of the rotation support arm 10 and contacts and presses the document P (see the dotted line in FIG. 1). When the document cover 4 is completely closed, The entire surface of the document P is pressed. As a result, there is an effect that the document P is prevented from being displaced from a predetermined position due to wind force generated when the document cover 4 is pressed down to press the document P as in the related art. .

This effect cannot be obtained from the conventional configuration in which the document pressing member 7 is fixed to the document cover 4, and is unique due to the loose insertion of one end of the cover 4 into the rotation support arm 10. The effect is.

Next, an embodiment of the document cover of the second invention will be described with reference to FIGS. 3 and 4. FIG.

FIG. 3 is a cross-sectional view showing a first embodiment of the document cover of the second invention, and FIG. 4 is a perspective view showing the first embodiment of the document cover of the second invention.

In the drawing, the conventional document cover and the first
The same components as those of the document cover according to the invention are denoted by the same reference numerals and will not be described in detail.

The document cover of the second invention can be simply described as follows.
In the document cover of the first invention, the document pressing member 7 is held in a state of being loosely inserted into the rotation support arm 10, so that when the document cover 4 is mounted on the apparatus main body 1, the document pressing member 7 is moved from the document cover 4. The rotation supporting arm 10 is used as the means of the first invention, and at the same time, the means for preventing the document pressing member 7 from being detached when the document cover 4 is mounted. The feature is that it is used as

That is, in the present embodiment, the document mat 6 is formed to be longer than before so that one end of the document mat 6 reaches the free end of the rotation support arm 10 located in the first state A. At four positions of the portion, there are provided through holes 20 for holding the support arms in a rectangular shape that is substantially equal to the cross-sectional shape of the rotation support arm 10.

According to the original cover 4 based on the above-described configuration, the attachment of the original pressing member 7 to the original cover 4 is performed as in the prior art, as shown by a dashed line in FIG. Document cover body 8 with stop holes 12 screwed
Then, as shown by a two-dot chain line in FIG. 4, the support arm holding through-hole 20 of the document mat 6 is loosely inserted into the rotary support arm 10 in the first state A. . The removal of the document pressing member 7 from the document cover 4 may be performed in the reverse order.

Next, when the document cover 4 is mounted on the apparatus main body 1, the rotation support arm 10 is rotated in the direction shown by the arrow so that the rotation support arm 10 assumes the second state B. At this time, the original mat 6 has a rotation supporting arm for flexibility.
The arm 10 is bent together with the rotation support arm 10 so that the arm 10 can assume the second state B. At this time, the document mat 6 is formed to have such a length that it can be attached to and detached from the rotation support arm 10 in the first state A, and cannot be attached to and detached from the rotation support arm 10 in the second state B. ing.

In this state, the document cover 4 is attached to the apparatus main body. At this time, since the rotation support arm 10 acts as a stopper for the document mat 6, the document pressing member 7 must be removed from the document cover 4. Is prevented beforehand.

Further, according to the document cover 4 of the present embodiment, when the document cover 4 is mounted on the apparatus main body 1 (the second state B of the rotation support arm 10), the document mat 6 is rotated and supported in a bent state. Since the document 10 is held by the arm 10, the pressing force on the document P when the document cover 4 is closed can be made larger than that in the embodiment of the first invention. Also, the state in which the document cover 4 is closed (the first state A of the rotation support arm 10).
In the case of the first embodiment, the original mat 6 does not bend and is flat with respect to the original P, so that the original P
The pressing force can be applied more uniformly to the entire surface of the substrate.

Subsequently, the second embodiment of the document cover according to the second invention will be described with reference to FIGS. 5 and 6 only for differences from the first embodiment.

FIG. 5 is a perspective view showing a second embodiment of the document cover of the second invention, and FIG. 6 is a cross-sectional view showing the second embodiment of the document cover of the second invention. FIG. 6A is a cross-sectional view showing a state where the document cover is closed, and FIG. 6B is a cross-sectional view showing a state where the document cover is opened.

The first difference between the document cover of the second embodiment and the document cover 4 of the first embodiment is that the document mat 6 is not provided with the through-hole 20 for holding the support arm, but is different from the document pressing member 7. A different point is that a through-hole 20 for holding the support arm is provided in the separate elastic pressing piece 13 and is attached to one end side of the elastic pressing member 5 of the document pressing member 7. This makes it possible to further increase the pressing force of the document pressing member 7 on the document P, and the transmission of the pressing force on the document P is further improved.

The second difference between the document cover of the second embodiment and the document cover 4 of the first embodiment is that a pair of sliding pins 14 are attached to the other end of the document pressing member 7 and this slide is provided. A guide portion 15 having a guide groove 16 for slidably guiding the moving pin 14
Is provided on the document cover body 8 so that the document pressing member 7 can be moved to one end and the other end of the document cover 4. As a result, as shown in FIG. 6, when the document cover 4 is closed, the document pressing member 7 can move in the direction of transmitting the document pressing force, so that the document P can be reliably moved in the direction of the pressing force. Pressing can be performed, and the possibility that the document cover 4 is closed in a state where the document pressing member 7 is bent can be prevented beforehand.

(Effect) According to the document cover of the first invention, the rotating support arm is used as a means for attaching and detaching the document cover to and from the apparatus main body, and at the same time, the support arm holding through hole of the document pressing member is loosely inserted and held. The original cover having the rotation supporting arm can be fully utilized, and the attaching and detaching of the original pressing member can be more easily and quickly performed, so that the original cover of the original pressing member can be used. It is possible to reduce the number of parts to be attached to the vehicle.

Further, according to the document cover of the second invention, the rotation supporting arm is used as the first invention and at the same time, is used as a retaining means for the document pressing member. In addition to the effects of the first aspect, it is possible to prevent the document pressing member from being detached from the document cover at the time of mounting.

In the document covers according to the first and second inventions, the document pressing member is configured to be loosely inserted into the rotation support arm, so that the document pressing member holds the document when the document cover is closed. This makes it possible to gradually contact and press, so that there is a remarkable effect that it is possible to prevent the original from being displaced due to the wind force generated by the closing operation of the original cover when the original cover is closed.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the original cover of the first invention, FIG. 2 is a perspective view showing an embodiment of the original cover of the first invention, and FIG. 3 is an original of the second invention. FIG. 4 is a cross-sectional view showing a first embodiment of the cover, FIG. 4 is a perspective view showing a first embodiment of the document cover of the second invention, and FIG. 5 is a second embodiment of the document cover of the second invention. FIG. 6 is a perspective view showing an example, FIG. 6 is a sectional view showing a second embodiment of the original cover of the second invention, FIG. 7 is a sectional view showing a conventional original cover, and FIG. FIG. DESCRIPTION OF SYMBOLS 1 ... body, 4 ... original cover, 7 ... original holding member, 8 ... original cover body, 10 ... rotation support arm, 12 ...
Locking holes, 20: Through holes for holding the support arm

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G03B 27/62

Claims (5)

(57) [Claims] An original holding member having flexibility and for pressing an original, an original cover body for detachably attaching the original pressing member, and a rotatable one end of the original cover body. A document cover having a rotation support arm detachably attached to the apparatus main body, the document holding member being detachably attached to the document cover body. A document cover, comprising: a support portion; and a support arm holding through hole that is removably loosely inserted into the rotation support arm. 2. A document holding member having flexibility and for pressing a document, a document cover body for detachably attaching the document holding member, and a rotatable one end of the document cover body. A document cover having a rotation support arm detachably attached to the apparatus main body, the document holding member being detachably attached to the document cover body. And a support arm holding through hole that is removably loosely inserted into the rotation support arm. When the rotation support arm is attached to and detached from the apparatus main body, the rotation support arm holds the support arm of the document pressing member. A document cover configured to serve as a retaining means for preventing the through hole for use from being detached from the rotation support arm. 3. The rotation support arm has a first state located at a predetermined distance from the other end of the document cover main body and a second state located at a position farther than the predetermined distance. 3. The document cover according to claim 1, wherein the document cover is rotatably provided so as to be removable. 4. The document cover according to claim 1, wherein said rotation supporting arm is detachably attached to the apparatus main body when said rotation supporting arm takes a second state. 5. The document cover is closed when the rotation support arm is in a first state, and is open when the rotation support arm is in a second state. The document cover according to any one of claims 1 to 4, wherein the document cover is configured.