JPH0645959Y2 - Copier manuscript cover - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a document cover attached to, for example, a transfer type electrostatic copying machine to hold a document to be copied.

PRIOR ART A typical prior art is shown in FIG. An original pressing mat 2 made of, for example, a sponge is attached to the surface of the original cover 1 facing the copying machine main body 3.
Is placed on the document table 4 arranged on the upper end surface of the.
The original 5 to be copied is placed between the original pressing mat 2 and the original table 4.

Although the original cover 1 is designed so as to be flat during molding, the original cover 1 may warp during molding, and the original cover 1 formed in a flat shape may have a main body 3 as well. The warp may occur due to a temperature change and a change with time due to the optical system. Such types of warp include, for example, a warp that is convex upward as shown in FIG. 6 (1) and a so-called reverse warp as shown in FIG. 6 (2). Document holding mat 2
Is attached to the original cover 1 at both sides 1a and 1b thereof, and when a convex warp occurs, the central portion of the original cover 1 is placed on the original 5 only by its own weight of the mat 2.
Will be suppressed. Therefore, as shown in FIG. 7, for example, when a document 5 having a fold 5a is placed, this fold 5a portion pushes the mat 2 upward, and this fold 5a portion is the original document. It separates from the table 4, and the original image of the fold 5a is blurred.

Further, in the case of so-called reverse warp shown in FIG. 6 (2), both side portions 2a, 2b of the mat 2 are separated from the original table 4, and the inside of the main body 3 is inserted from this portion via the original table 4. The light from the light source is emitted. Therefore, so-called black solid is generated on both sides of the document 5, not only the document image cannot be seen, but also toner is consumed more than necessary. Further, even in the original cover 1 which is convexly warped upward, reverse warping may occur by pressing the central portion thereof.

An object of the present invention is to provide an original cover of a copying machine which can prevent the quality of a copied original image from deteriorating even if a warp occurs due to a temperature change of the main body of the copying machine. .

According to the present invention, a cover member made of a synthetic resin material whose one end is angularly displaceably coupled to a main body of a copying machine, and a peripheral portion of the cover member is attached to the main body side of the copying machine. A fixed and elastic document pressing member is included, and in a region of the cover member facing the document pressing member, the height of the angular displacement from the cover member increases at least along the axial direction, and then decreases. A plurality of reinforcing members 31 to 37 are provided at equal intervals, and the reinforcing members 33 to 35 near the center are several reinforcing members 33.
A manuscript cover for a copying machine, wherein a-33c, 34a-34c, and 35a-35c are arranged in a row with a constant width so that the height increases in the direction intersecting the axis and then decreases.

According to the present invention, in the region of the cover member facing the document holding member, the height of the angular displacement of the cover member from the cover member increases along at least the axial direction, and then the height of the plurality of reinforcing members decreases. Are provided at equal intervals. The reinforcing members near the central portion are arranged in a row with a constant width such that the height of several reinforcing members increases in the direction intersecting the axial direction and then decreases. As a result, for example, the cover member formed in a planar shape or in a shape along the upwardly convex shape causes substantially even warpage in the four upwardly convex directions due to, for example, a temperature change of the copying machine body. Also, the warp of the original cover can be absorbed through the above-mentioned reinforcing member and elastic original pressing member, and the original placed on the main body of the copying machine can be held in a flat state so that the original is copied. It is possible to prevent the quality of the original image to be deteriorated.

Embodiment 3 FIG. 3 is a perspective view of a copying machine 11 in which a document cover 10 according to an embodiment of the present invention is used. The original cover 10 is attached to the copying machine main body 12 so as to be freely angularly displaced, and an original pressing mat 14 made of, for example, a sponge is attached to the surface of the original cover 10 facing the original table 13. Body
An operation panel 15 is provided on the front side of 12. A paper feed tray 16 is arranged on the paper feed side of the main body 12, and a paper discharge tray 17 is arranged on the paper discharge side.

FIG. 1 is a perspective view of the document cover 10 and the document pressing mat 14, and FIG. 2 is a sectional view showing one use state of the document cover 10. On the surface 10a of the manuscript cover 10 facing the main body 12 side, four sticking parts to which the manuscript holding mat 14 is stuck
21-24 are formed. The document holding mat 14 has its corners
14a to 14d are attached to the attaching portions 21 to 24 via, for example, double-sided tape. The manuscript cover 10 to which the manuscript retainer mat 14 is attached has the main body 12 with the dashed-dotted line 1 as the axis of rotation.
It can be mounted at any angle.

A plurality of ribs (37 in this embodiment) of ribs 31 to 37 are provided as reinforcing members in a region surrounded by the four attachment portions 21 to 24 of the document cover 10, that is, a region corresponding to the document pressing mat 14.
Are formed in a direction intersecting the rotation axis 1 with a certain space therebetween. Ribs 33 formed near the center
Is composed of three parts of the first to third parts 33a, 33b, 33c, and the height ha of the first part 33a from the surface 10a and the heights hb, hc of the second and third parts 33b, 33c. The relation with is selected such that ha> hb≈hc (1). The other two ribs in the center 3
4, 35 have the same structure as the rib 33. Hereinafter, these three ribs 33 to 35 in the central portion will be collectively referred to as the first rib L1.
The height of the rib L1 is the height ha of each of the first portions 33a, 34a, 35a.

The height hb of the two ribs 32 and 36 (hereinafter collectively referred to as the second rib L2) formed by sandwiching the first rib L1 and the second rib L2
Two ribs 31 and 37 formed by sandwiching the
The height he of the first rib L1 and the height ha of the first rib L1 are selected so that ha>hd> he (2).

Thus, the first rib L1 is selected the highest, and the second rib L2 and the third rib L3 are selected in that order. Therefore,
For example, as shown in FIG. 2, even if the document cover 10 is warped so as to be convex upward, the document pressing mat 14 can be pressed with a uniform force and is placed on the document table 13. It is possible to hold the folds of the original document in a flat state.

On the other hand, as shown in FIG. 4, even when the document cover 10 is formed in a substantially flat shape, the first to third ribs L1 to L3 are formed.
Since the difference in each height is absorbed by the document pressing mat 14, the document placed on the document table 13 can be held in a substantially flat state. Therefore, when the original cover 10 is between the plane shape shown in FIG. 4 and the upward convex shape shown in FIG. 2, it is possible to prevent the quality of the copied image from being deteriorated due to a fold of the original or the like. Is possible.

Further, when the original cover 10 is molded, the shape thereof is set so as to be within the above-described range (between the planar shape and the upwardly curved shape), as described in the section of the prior art. The occurrence of reverse warp can be suppressed as much as possible, and the warp due to temperature change or aging change of the main body 12 can be dealt with, which can contribute to improvement of image quality.

As described above, according to the present invention, even if the document cover is warped upward in four directions due to a change in the temperature of the main body of the copying machine, for example, even if the warp occurs, the document pressing member is used. Thus, the original can be pressed in a flat state, and deterioration of image quality can be prevented.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of the vicinity of a document cover 10 according to an embodiment of the present invention, FIG. 2 is a cross-sectional view showing one state of use of the document cover 10, and FIG. 3 is a copier 11 in which the document cover 10 is used. FIG. 4 is a perspective view, FIG. 4 is a cross-sectional view showing another state of use of the manuscript cover 10, FIG. 5 is a cross-sectional view showing a typical prior art, and FIGS. 6 and 7 are for explaining defects of the prior art. FIG. 10 ... Original cover, 11 ... Copy machine, 12 ... Copy machine main body, 13 ... Original table, 14 ... Original pressing mat, 31-37 ... Ribs

Claims (1)

[Scope of utility model registration request] 1. A cover member made of a synthetic resin material, one end portion of which is angularly movably coupled to a main body of a copying machine, and a peripheral portion of the cover member is attached and fixed to the main body side of the copying machine and has elasticity. In a region of the cover member that faces the document pressing member, the height of the angular displacement from the cover member increases at least along the axial direction, and then the plurality of reinforcing members 31 decrease so as to decrease. ~ 37 are provided at equal intervals, and the reinforcing members 33 to 35 near the center are several reinforcing members 33.
A manuscript cover for a copying machine, wherein a-33c, 34a-34c, and 35a-35c are arranged in a row with a constant width so that the height increases in the direction intersecting the axis and then decreases.