JP2022190573A5 - - Google Patents

Description

Next, in a hinge according to a fifth aspect of the present invention, the elastic member is a compression coil spring, and a damper device is housed therein, which operates from a predetermined closing angle of the original cover.

Since the present invention is configured as described above, even if the edge of a document placed on the document placement table for copying hits the hinge, the partition provided on the mounting case can prevent the edge of the document from hitting the passive cam portion provided on the slider, the operating cam portion provided on the support member side, or even the front side of the slider, so that the edge of the document can be almost completely prevented from being soiled by lubricating oil. Also, it is possible to provide an office machine that achieves the above-mentioned functions and effects.

The hinge 10 according to the present invention is composed of a mounting case 5 having a slider housing portion 5a with an open top (also called one end open) attached to the rear upper end side of the device main body 2, a slider 8 having a passive cam portion 8a on the upper surface side of the slider housing portion 5a of the mounting case that is slidable in the vertical direction, a support member 7 that is rotatably attached to the mounting case 5 via a hinge shaft 9 and has an operating cam portion 7c that contacts the passive cam portion 8a on the lower surface side, which supports the original cover 3 at its rear end, and an elastic member 13 such as a compression coil spring that is elastically contacted between the slider 8 and the mounting case 5, and a flat screen portion 11 is provided at the upper front end of the mounting case 5 facing the operating cam portion 7c, the passive cam portion 8a, and further the slider 8, facing upward. The shape and configuration of this screen portion 11 in the embodiment is flat, but depending on the mounting case and other reasons, it is possible to think of a curved shape other than flat, or a shape with slits. A partition housing portion 7d is provided on the underside of the support member 7 to house the partition portion 11 when the original cover 3 is closed. Furthermore, what is indicated by the reference symbol 7f on the support plate portion 7b is an attachment hole for attaching the cover body 3.

The mounting case 5 in the embodiment is a resin molded product such as POM, which has a high mechanical strength, and in addition to the slider accommodating portion 5a, it has a flange portion 5b around its upper end, and a pair of side plate portions 5d, 5d having a common axis and shaft support holes 5c, 5c are provided at a predetermined distance upward from both left and right sides of the flange portion 5b, and a stopper portion 5e is provided on the rear side of the flange portion 5b. Furthermore, reinforcing ribs 5f, 5f are provided vertically on the rear side of the mounting case 5, and a female mounting screw hole 5g is provided on one side of the rear of the lower end side of the mounting case 5.

Next, a hollow slider 8 having a rectangular planar shape is accommodated in a slider accommodation portion provided in the mounting case 5 so as to be able to slide up and down. A passive cam portion 8a that comes into contact with the operating cam portion 7c is provided on the outer upper surface of this slider, and an elastic member 13 made of a compression coil spring is elastically installed between the inner bottom portion 5h of the mounting case 5 and the inner top portion of the slider 8. The form or number of this elastic member 13 is one in the embodiment, but it may vary depending on the torque required for the hinge 10, and may be two or three, or compression coil springs of different diameters may be used stacked together. Furthermore, a damper device may be incorporated in the compression coil spring.

When an operator opens the original pressure plate 3 to place the original A on the original placement table 2b in order to set the original A on the original placement table 2b for copying, depending on the type and shape of the original A, it is often the case that the end of the original A comes off the original placement table 2b and reaches the hinge 10 side. However, as shown in Figures 1 to 3, even if the end of the original A reaches the hinge 10 side, the partition portion 11 can almost completely prevent the end of the original A from coming into contact with the operating cam portion 7c or passive cam portion 8a of the hinge 10, or even the front side of the slider 8, and becoming dirty by touching the lubricating oil applied thereto.

1. Office equipment (copying machines)
2 Device body 2a Mounting hole 2b Document placement table 3 Document pressing plate (lid)
5 Mounting case 5a Slider accommodating portion 5b Flange portion 5d Side plate portion
5e Stopper portion 5g Female screw hole for mounting 5h Inner bottom portion 6 Hinge shaft 7 Support member 7a Connecting portion 7b Support plate portion
7c Operating cam portion 7d Screen storage portion 7e Connection hole
7f Mounting hole
8 Slider 8a Passive cam portion 8b Inner top portion 8c Elastic member housing portion 10 Hinge 11 Screen portion 13 Elastic member (compression coil spring)

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