JPH0475488B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a document holder that is attached to the body of a copying machine or the like so as to be openable and closable and is used to hold down a document placed on a transparent plate on the top surface of the machine.

Normally, this type of document holder consists of a holding plate for holding the document and a mounting member for the machine body.
By attaching the presser plate to the attachment member via a hinge, it is configured to be openable and closable. Therefore, the conventional document presser requires a hinge in addition to the presser plate and the mounting member. Furthermore, in order to prevent the document from shifting, the presser plate must be constructed so that it can be elastically closed when closed, and conversely, when opened, it must be configured so that it can be elastically opened.
Conventionally, between the holding plate and the mounting member,
In addition to the hinge, it also included an unstable switching mechanism using springs and various other members, which resulted in a complicated structure and high cost.

The present invention aims to eliminate such conventional drawbacks, and has a simple structure in which the presser plate and the mounting member are integrally molded from synthetic resin, and an opening/closing member also made of synthetic resin is provided. It is an object of the present invention to provide a useful document holder that can be manufactured at low cost.

An embodiment of the present invention will be described based on illustrative drawings. Reference numeral 1 denotes a body of a copying machine. On one side of this body 1, two tiers of copying machine cassettes 2 and 3 are set, upper and lower, and on the other side. A copy paper tray 4 is provided in the section, and a transparent plate 5 is provided on the top surface. 6
7 is a holding plate for holding down the original, and 7 is a mounting member. The holding plate 6 and the mounting member 7 are integrally molded from synthetic resin such as polypropylene, and the mounting member 7 is attached to the body 1 by screws 8. By fixing, the presser plate 6 is configured to be able to open and close using the thin opening/closing portion 9 provided on the mounting member 7 as a fulcrum. Reference numeral 10 denotes an approximately L-shaped opening/closing member. This opening/closing member 10 is also made of synthetic resin such as polypropylene, and is integrally molded together with the holding plate 6 and the mounting member 7, and the opening/closing member 10 itself can be elastically closed. It is configured such that a biasing force is applied in the direction. The opening/closing member 10 is integrally connected to the holding plate 6 and the mounting member 7 only at its front edge and rear edge. are configured with bent portions 11 and 12 with cutouts, and are hinge-connected by this, and in particular, the bent portion 12 of the opening/closing member 10 with respect to the mounting member 7 is connected to the mounting member 7. It is located below the thin wall portion 9 of the.
Further, the bent portion 11 of the opening/closing member 10 relative to the presser plate 6 is located above the thin wall portion 9 of the mounting member 7, and both bent portions 11 and 12 are located above the thin wall portion 9. As described later, the elastic force of the opening/closing member 10 allows the presser plate 6 to
is configured such that when it is closed, a biasing force is elastically applied in the closing direction, and when it is opened, a biasing force is applied in the opening direction. In addition, 1 in the figure
Reference numerals 3 and 14 denote a pair of stopper surfaces that are continuous with the thin wall portion 9, and 15 is an elastic body made of sponge or the like fixed to the inner surface of the presser plate 6.

Next, to explain the action, Figures 1 and 3
4 and 4 respectively show the presser plate 6 in a closed state, when the presser plate 6 is lifted upward from this state, the presser plate 6 rotates upward using the thin wall portion 9 as a fulcrum. Along with this, the opening/closing member 10 also rotates about the bent portion 12 and is forcibly expanded. That is, as shown in FIG.
The bent portion 11 attempts to rotate along an arc A with the other bent portion 12 as a fulcrum, but in reality it rotates along an arc B with the thin wall portion 9 as a fulcrum. The distance between both arcs A and B is forcibly widened. Therefore, when the point where the distance between both arcs A and B is maximum is the dead center C, when the presser plate 6 is in the closed state on the left side, the presser plate 6 tends to close elastically, and conversely, when the presser plate 6 is in the closed state on the left side, When it is in the open state, it tries to open elastically, and has exactly the same effect as a conventional unstable switching mechanism. When the presser plate 6 is opened, the presser plate 6 is held in the open position shown in FIG. 2 or 5 by the contact between the stopper surfaces 13 and 14.

In addition, in the embodiment, not only the holding plate 6 and the mounting member 7 but also the opening/closing member 10 are all integrally molded, but the opening/closing member 10 is molded separately using synthetic resin. After molding, it can also be carried out by being connected to the presser plate 6 or the attachment member 7 by various means.

As is clear from the above description, the document holder according to the present invention has a simple structure consisting only of a holding plate integrally molded from synthetic resin, a mounting member, and an opening/closing member also made of synthetic resin, and has a simple structure that does not require unstable switching in the past. Since it can be expected to function exactly the same as the mechanism, the hinges and springs that were required in the past were no longer necessary, and the structure was greatly simplified, making it possible to achieve extreme cost reductions.

[Brief explanation of the drawing]

The drawings illustrate an embodiment of the document holder according to the present invention, and FIGS. 1 and 2 are overall perspective views, FIG. 3 is a cross-sectional view taken along the line -- in FIG. 1, and FIG. 4 is a view of FIG. FIG. 5 is a sectional view taken along the - line in FIG. 2. FIG. DESCRIPTION OF SYMBOLS 1... Body, 6... Holding plate, 7... Mounting member, 9... Thin wall part, 10... Opening/closing member, 11, 1
2...Bending part.

Claims (1)

[Claims] 1. A presser plate for holding down the original and a mounting member for attaching the presser plate to the machine body are integrally molded from synthetic resin, and the mounting member is provided with a thin section for opening and closing the presser plate, so that the presser plate can be elastically moved in the closing direction. A substantially L-shaped opening/closing member made of synthetic resin that is biased toward is connected to the presser plate and the mounting member only at its front edge and rear edge through bent portions, and By arranging these bent portions in positions corresponding to the upper and lower portions of the thin wall portion, the elastic force of the opening/closing member applies an elastic biasing force in the closing direction when the presser plate is closed. A document holder characterized in that it is configured to apply a biasing force in the opening direction when opened.