JPH0443868Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a document placing device used in a copying machine or the like, and particularly to a document placing device configured to allow a document to be placed face up.

BACKGROUND TECHNOLOGY Generally, when copying a document using a copying machine,
The original is placed with the side to be copied facing down on an original placing table called a platen glass, and the original is moved and exposed, or the original is fixed and the optical system is moved to perform scanning exposure. An electrostatic latent image corresponding to the original is formed on the body drum. A method in which exposure is performed by moving an original while keeping the optical system fixed is generally used in small-sized copying machines because the apparatus can be simplified.
However, when copying a bound thick document such as a book using the above-mentioned method of moving the document and performing exposure with the side to be copied facing downward, the book, etc. to be copied is placed on a platen glass that is moved by hand. The document must be held down, which may cause the original to be copied to be misaligned, requiring a very troublesome and inconvenient operation.

Therefore, in recent years, copying machines have become mainstream, even in small-sized copying machines, in which a stationary platen is used, and a document is placed face down on the stationary platen for scanning exposure. This is thought to be due to the ease of operation when a stationary platen is employed, as well as the strong demand for copying thick originals such as books. However, copying machines that use a stationary platen and form a latent image through scanning exposure using an optical system have limitations on how compact they can be.
It cannot be made too small. Therefore, the present applicant previously proposed a copying machine configured to copy a document by pressing the document face up against a platen glass from below. According to the document placement device of this copying machine, the spring presses the document to be copied against the platen glass from below, so even thick documents such as books do not need to be manually pressed against the platen glass surface. It is very convenient because it allows you to prepare for copying while observing the page to be copied from above the platen glass, and it can be said to be an epoch-making device in that it allows a small copying machine to copy books and the like. Prior art of this type of device includes Japanese Patent Application Laid-open No. 55-43558 and Japanese Utility Model Application No. 56-88245.

In the above-mentioned copying machine, the original moves horizontally together with the original cover having a platen glass, enters and exits the inside of the copying machine, and is exposed by passing near a fixed exposure device. but,
The direction of movement is often made to coincide with the direction of the rotation axis of the document cover in order to save installation space and improve operability of the copying machine. Further, in order to ensure the safety of the operator, a safety cover is generally provided that covers the movement path of the document cover and the like during copying, but does not move itself.

Problems that the invention aims to solve The above-mentioned safety cover is normally provided so that it can be opened and closed like the document cover for loading documents, and the operator has to separate the safety cover and document cover each time to load a document. It opens and closes. Therefore, when there are a large number of documents, it is necessary to open and close each document twice, making the work complicated.

The present invention has been devised in view of this problem, and its purpose is to provide a document placement device having a safety cover that can be opened and closed together with the document cover.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a document placement table on which a document is placed facing upward, a frame that supports the document placement table via a biasing member, and a frame attached to the frame. A document for a copying machine, which is provided so as to be freely openable and closable about a hinge provided therein, and which scans the document by moving horizontally in the direction of the rotational center axis together with a document cover having a platen glass. The mounting device includes, at least on the horizontal movement direction side of the copying machine main body, a convex member having a convex portion forming a part of a side surface of a cylinder, and a substantially semicircular concave portion into which the convex portion is loosely fitted. A hinge for combination with a concave member having a space for the document cover to pass through is provided near the center of the semicircle, a safety cover covering the horizontally moving part is connected to this hinge, and the safety cover is rotated. To provide a document placement device in which a shaft and a rotation shaft of a document cover are aligned.

In a preferred embodiment of the present invention, the material of the convex member is a general steel material with a smooth surface;
As the material for the concave member, polyacetal resin or the like, which is less likely to wear due to friction with the convex member, can be used.

Effect In the present invention, the convex member having the convex portion forming a part of the cylinder is slidably fitted into the concave portion having a substantially semicircular diameter of the concave member, so that by fixing the concave member, the convex member is It is rotatable about the centers of the cylinder and semicircle, and the combination of the two acts as a hinge. In addition, since a space is provided near the center of the semicircular recess in the concave member, even if the rotation axis of the safety cover connected to the convex member and the rotation axis of the document cover are aligned, the document cover will not move in that space. , and its movement is not obstructed by the concave member.

Embodiments Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a partially sectional side view of the original document placement device of the present invention, in which a frame 10 is mounted on a main body 16 of a copying machine via a pair of rails 12 and a sliding roller 14 so as to be horizontally movable without coming off. There is. A hinge 18 is provided at the side end of the frame 10, and a document cover 20 is provided rotatably via the hinge. Reference numeral 22 denotes a document mounting table, which is supported by the frame 10 via a compression spring member 24. Therefore, by placing an original (not shown) face up on the original placing table 22 and closing the original cover 20, the original is placed on the original placing table 22.
2 and a platen glass 201 provided in the middle of the document cover 20 without shifting. Reference numeral 202 denotes a latch that is swingably provided via a shaft member 203 provided on the opposite side of the hinge 18 of the document cover 20, and the latch 202 locks the document by engaging with an opening (not shown) provided in the frame 10. Lock the cover.

Reference numeral 26 designates a safety cover that best shows the features of the document placement device of the present invention, and is supported by a concave member 28 provided on the main body of the copying machine via a convex member (not shown), and is attached to the rotation axis of the document cover 20, that is, the hinge. It rotates around an axis whose axis coincides with the rotation axis of No. 18. The combination of safety cover 26, convex member 30 and concave member 28 is best illustrated in FIGS. 2 and 3. The concave member 28 has a substantially semi-cylindrical portion on one side of the rectangular parallelepiped, and a circumferential concave portion 2 is formed around it.
81, and is made of polyacetal resin or the like. Further, the convex member 30 has a convex portion 301 that fits snugly into the aforementioned concave portion 281, and is made of a general steel material. By sufficiently polishing the surface of the steel material of the convex portion, it is compatible with the material of the concave member 28, and can slide smoothly without the use of any particular lubricant. As shown in FIG. 3, the hinge related to the combination of the convex member 30 and the concave member 28 is located at the side end of the safety cover 26 on the side opposite to the copying operation, and forms a part of the circumference of the convex portion 301. and recess 2
The center of the document cover 81 is configured to coincide with the rotation axis of the hinge 18 so that the center of the document cover 20 rotates.

As mentioned above, the document cover 20 and the safety cover 2
Since it has the same rotation axis as 6, it is possible to perform opening and closing operations at the same time. That is, in FIG. 1, one end 204 of the document cover 20 is inside the guide 261 provided on the safety cover 26, so the document cover operates integrally with the safety cover, and the operator places the document on the document table 22. By closing only the safety cover 26 after placing the document, the protruding member 262 provided inside the safety cover 26 pushes the one end 204 of the document cover downward and locks the latch 2.
02 to lock the document cover 20.

After locking, when you release your hand from the safety cover 26, the guide 2 provided at one end of the safety cover
63 is held in a proper position by a push rod 32 provided on the copying machine main body 16 and urged upward by a biasing member 34, and the frame 10 and document cover 20 slide toward the front in FIG. 1 during a copying operation. The device is constructed in such a way that it does not come into contact with the safety cover. In addition, 36 is Pushrod 3
2 is a pin fitted into the rod part to prevent it from coming off from the copying machine main body 16.

If the document cover and safety cover are handled as one unit as in the present invention, the weight may increase and workability may deteriorate. This problem can be solved by providing a biasing member (not shown) that biases in the opening direction to reduce the operating weight.

Next, the procedure for copying will be explained with reference to FIGS. 1 and 3. First, open the document cover 20 of the document placement device along with the safety cover 26, and place the copy on the document placement table 22. Should manuscript 38
Place the document with the original side facing up. Next, when the safety cover 26 is closed and the work front side is pushed down, the document cover 20 is also pushed down, the latch 202 is hooked on the frame 10, and the document cover is locked. In this case, in conventional document placement devices, i.e., those in which the document cover and safety cover do not work together, the position of the document can be confirmed through the platen glass when the document cover is closed. If the safety cover 26 is to be handled as an object, the position cannot be confirmed, so either the safety cover 26 is provided with an opening approximately the same size as the platen glass, and a transparent plate 264 made of acrylic resin or the like is provided there, or the safety cover 26 is It is desirable that the whole be made of a transparent material. Moreover, by adopting the above-mentioned configuration, it is convenient not only to be able to confirm the placement position of the document, but also to be able to confirm normal operation by visually observing the movement status and stopping status of the document table during the copying operation.

When the copy start switch is turned on after confirming that the original 38 is in the correct position, the original placing table 22 and the original cover 20 holding the original 38, and the frame 10 holding them, are moved by the action of a drive device (not shown). It slides in the direction indicated by arrow A in FIG. 3 and is carried into an exposure system inside the main body of the copying machine (not shown), where copying is performed.
Incidentally, in FIG. 3, for convenience, the copying machine main body and the document cover are not shown.

In the present invention, the safety cover 26 is not provided with a latch mechanism like the original cover 20, but in addition to this, an interlock mechanism (not shown) that stops the copying operation when the safety cover is opened during the copying operation is electrically connected. Since the system is configured in a safe manner, there will be no safety issues.

Effects of the invention In the original document placement device of the invention, a hinge formed by a combination of a convex member and a concave member is used to open and close the safety cover. Also, it becomes possible to match the rotation axis of the safety cover and the rotation axis of the document cover. As a result, it becomes possible to open and close the safety cover and the document cover as one body when setting the document, resulting in the effect of improving copying efficiency.

In the present invention, a hinge that is a combination of a convex member and a concave member is used in a document placement device of a copying machine, but it is of course possible to apply the hinge to other industrial products. .

[Brief explanation of the drawing]

FIG. 1 is a partially sectional side view showing an embodiment of the document placement device of the present invention, and FIG. 2 is a schematic structural diagram of a hinge related to a combination of a convex member and a concave member. Third
The figure is a schematic perspective view showing an embodiment of the document placement device of the present invention, 10... frame, 12... rail pair, 14...
... sliding roller, 18 ... hinge, 20 ... document cover, 201 ... platen glass, 202 ... latch, 22 ... document placement table, 26 ... safety cover, 28 ... concave member, 30 ... convex member , 32...
Pussyurotsudo, 38...manuscript.

Claims (1)

[Scope of utility model registration request] A document placing table on which a document is placed facing upward, a frame that supports the document placing table through an urging member, and a hinge provided on the frame that can be freely opened and closed, and a platen glass. In a document placement device of a copying machine, which scans a document by horizontally moving in the direction of the rotation center axis together with a document cover having a cylindrical side surface, at least on the side of the copying machine main body in the horizontal movement direction. A combination of a convex member having a convex portion forming a part of the convex member, and a concave member having a substantially semicircular concave portion into which the convex portion is loosely fitted, and a space near the center of the semicircle for the document cover to pass through. A document holder characterized in that a hinge for alignment is provided, a safety cover covering the horizontally moving portion is connected to the hinge, and a rotation axis of the safety cover and a rotation axis of the document cover are aligned. Device.