JP4164218B2 - Opening and closing body hinge - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement of a hinge having a free stop function capable of stopping and holding an opening / closing body such as a document pressure plate of a copying machine at an arbitrary opening angle.
[0002]
[Prior art]
Examples of this type of opening / closing body hinge include those disclosed in Japanese Utility Model Publication No. 3-2628 and Japanese Patent Publication No. 3-74372. There, a fixed-side hinge body attached to a base such as a copying machine main body, and pivotally connected to the fixed-side hinge body so as to be pivotable in the vertical direction around the hinge pin, and can be opened and closed in the vertical direction with respect to the base. And a movable-side hinge body attached to the rotation base end side of the opening / closing body installed in the. A cam mechanism and a compression coil spring are provided between the fixed-side hinge body and the movable-side hinge body, and the balance between the closing moment due to the weight of the opening / closing body is maintained by the cooperative action of the cam mechanism and the compression coil spring. Thus, the opening / closing body can be stopped and held at an arbitrary opening angle.
[0003]
[Problems to be solved by the invention]
However, the hinge of the opening and closing body requires a cam mechanism in addition to the compression coil spring. However, the combined use of the cam mechanism requires many parts and man-hours for assembly, resulting in a complicated structure and an increase in size. The cost was also high.
[0004]
An object of the present invention is to solve such a problem. By omitting the cam mechanism, the number of assembly members and man-hours can be reduced, and the structure can be simplified and miniaturized. An object of the present invention is to provide a hinge for an opening / closing body.
[0005]
[Means for Solving the Problems]
As illustrated in FIGS. 1 and 2, the present invention includes a fixed-side hinge body 4 attached to a base 1 such as a copying machine main body, and the fixed-side hinge body 4 that is rotatable up and down around a hinge pin 8. A movable-side hinge body 5 that is pivotally connected and is attached to a pivot base end side of an opening-and-closing body 2 that is pivotably connected to the base 1 in an up-and-down direction. The stationary-side hinge body 4, a stopper pin 9 is fixed in parallel to the hinge pin 8 at a position below the hinge pin 8 and offset outward in the rotational radial direction of the opening / closing body 2, and the movable side hinge body 5 has a hinge slider. 10 is provided so as to be movable in the direction of the turning radius of the opening / closing body 2, and the hinge slider 10 has a horizontally long groove 11 that is formed in parallel with the turning radius direction of the opening / closing body 2, and is orthogonal to the horizontally long groove 11. Formed vertically so that The hinge pin 8 is slidably inserted in the horizontally long groove 11 and the stopper pin 9 is slidably inserted in the vertically long groove 12, respectively. The movable side hinge body 5 and the hinge slider 10, a compression coil spring 14 is attached to the hinge slider 10 that always presses and urges the hinge slider 10 inward in the rotational radial direction of the opening / closing body 2 to give the movable hinge body 5 a moment in the opening direction. It has a feature in being.
[0006]
[Action]
The moment in the closing direction acting on the movable side hinge body is generated by the weight of the opening / closing body attached to the movable side hinge body. When the opening angle of the movable side hinge body increases, the moment decreases, and conversely, the opening angle decreases. Then the moment increases.
Now, in a state where the opening / closing body is closed in a horizontal posture by a moment in the closing direction due to its weight, the compression coil spring is in the shortest compressed state, and the hinge pin is in the opening / closing body turning radial direction in the lateral groove of the hinge slider The stopper pins are respectively located at the upper end portions in the longitudinal grooves at the inner end portions.
[0007]
From this state, when the opening / closing body is opened against the moment in the closing direction due to the weight of the opening / closing body and the friction force generated between the sliding groove between the longitudinal groove of the hinge slider and the stopper pin, the compression coil spring gradually expands. The hinge slider has an inner end in the radial direction of the opening / closing body in the horizontal groove gradually away from the hinge pin, and an upper end in the vertical groove is gradually separated from the stopper pin. Move towards you. At this time, the opening / closing body can be opened arbitrarily by balancing the moment in the opening direction due to the urging force of the compression coil spring, the moment in the closing direction due to the weight of the opening / closing body, and the frictional force due to the sliding of the longitudinal groove of the hinge slider and the stopper pin. The free stop function that stops and holds the angle is demonstrated.
[0008]
Further, as the opening / closing body is greatly opened, the rotational radius of the moment is increased through the longitudinal groove that slides with respect to the stopper pin. Therefore, the compression coil spring needs a small spring force.
Since the longitudinal groove of the hinge slider slides against the stopper pin, it is possible to increase the frictional force between the sliding surfaces, so that the free stop effect and the sudden closing moment caused by the weight of the opening / closing body The damper effect which prevents a fall phenomenon can be heightened.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 is a longitudinal side view of a hinge when the opening / closing body according to the present invention is fully closed, FIG. 2 is a longitudinal side view of the hinge when the opening / closing body is half-opened, and FIG. 3 is an exploded perspective view of the hinge.
[0010]
In FIG. 1, reference numeral 1 denotes a base of a copying machine main body, 2 denotes an opening / closing body such as an original pressure plate, and 3 denotes a hinge according to the present invention. ing. The hinge 3 includes a fixed-side hinge body 4 attached to the base 1 with a screw (not shown) and a movable-side hinge body 5 attached to the rotation base end side of the opening / closing body 2 with a screw (not shown).
[0011]
As shown in FIG. 3, the fixed-side hinge body 4 is formed in a shape having a bottom plate 4a attached to the base 1 with screws or the like not shown, and side plates 4b and 4b raised from both ends of the bottom plate 4a. The pivot holes 6 and 6 are provided in the upper end side of the side plates 4b and 4b. Furthermore, stopper pin support holes 15 and 15 are provided at positions of the side plates 4b and 4b that are located below the pivotal support holes 6 and 6 and outwardly in the rotational radial direction of the opening / closing body 2.
[0012]
On the other hand, the movable-side hinge body 5 includes a bottom plate 5a, side plates 5b and 5b raised from both ends of the bottom plate 5a, and lips 5c and 5c bent inward from the side plates 5b and 5b in parallel with the bottom plate 5a. The side plate 5b is provided with a pivot hole 7 at one end on the rotating base end side of the side plate 5b, and a spring receiving plate portion 5d is raised at the rotating tip side end of the bottom plate 5a. Yes. The movable side hinge body 5 is formed by inserting the hinge pins 8 into the pivot holes 7 and 6 by aligning the pivot holes 7 and 7 of the side plates 5 b and 5 b with the pivot holes 6 and 6 of the fixed side hinge body 4. The fixed-side hinge body 4 is pivotally connected to the hinge pin 8 so as to be pivotable in the vertical direction. A stopper pin 9 is inserted and fixed in parallel to the hinge pin 8 in the stopper pin support holes 15 and 15 of the side plates 4 b and 4 b of the fixed side hinge body 4.
[0013]
A hinge slider 10 is provided on the movable hinge body 5. The hinge slider 10 is formed of a polyacetal-based resin or a polyamide-based resin excellent in wear resistance, and is formed in a horizontally long groove 11 parallel to the rotational radius direction of the opening / closing body 2, and below the horizontally long groove 11. In addition, it has a vertically long groove 12 formed in a vertically long shape so as to be orthogonal to the horizontally long groove 11 at a position biased outward in the rotational radius direction of the opening and closing body 2, and the spring receiving cylinder portion 13 is connected to the turning radius of the opening and closing body 2. It is formed outward in the direction.
[0014]
The hinge slider 10 is fitted between the bottom plate 5a of the movable hinge body 5 and the lip 5c so as to be slidable in the rotational radius direction of the opening / closing body 2, and the hinge pin 8 is inserted into the horizontally long groove 11 and the vertically long groove 12 is. Each of the stopper pins 9 is slidably inserted. As means for sliding and guiding the hinge slider 10 straight in the rotational radius direction of the opening / closing body 2 with respect to the movable-side hinge body 5, a convex portion 10a is provided on the upper surface of the hinge slider 10, and this convex portion 10a is used as the movable-side hinge. The lip 5c of the body 5 is slidably fitted into the gap between the opposite end edges of the lip 5c.
[0015]
A compression coil spring 14 is interposed between the spring receiving tube portion 13 of the hinge slider 10 and the spring receiving plate portion 5 d of the movable side hinge body 5. The compression coil spring 14 always applies a moment in the opening direction to the movable-side hinge body 5 by pressing and urging the hinge slider 10 inward in the rotational radial direction of the opening / closing body 2.
[0016]
Next, the operation of the hinge 3 having the above-described configuration in which the fixed-side hinge body 4 is attached to the base 1 and the movable-side hinge body 5 is attached to the rotation base end side of the opening / closing body 2 will be described.
FIG. 1 shows a state diagram in which the opening / closing body 2 is fully closed in a horizontal posture. In this state, the compression coil spring 14 is in the shortest compressed state, the hinge pin 8 is at the inner end 11a in the opening / closing body rotation radial direction in the laterally long groove 11 of the hinge slider 10, and the stopper pin 9 is the vertically long groove. 12 are located at the upper end portion 12a. When the opening / closing body 2 is fully closed to the horizontal position, the magnitude of the closing moment generated by the weight of the opening / closing body 2 and the magnitude of the opening moment generated by the biasing force of the compression coil spring 14 are balanced. Held by.
[0017]
From this fully closed state, the opening / closing body 2 is moved upward around the hinge pin 8 against the moment in the closing direction due to the weight of the opening / closing body 2 and the frictional force generated between the sliding surfaces of the longitudinal groove 12 of the hinge slider 10 and the stopper pin 9. As shown in FIG. 2, the compression coil spring 14 gradually extends, and the hinge slider 10 moves the inner end 11 a in the opening / closing body rotation radial direction in the lateral groove 11 from the hinge pin 8. The upper end portion 12a in the longitudinal groove 12 is gradually separated from the stopper pin 9 and moved inward in the opening / closing body turning radial direction from the movable hinge body 5. At this time, the moment in the opening direction due to the biasing force of the compression coil spring 14, the moment in the closing direction due to the weight of the opening / closing body 2, and the frictional force generated between the sliding surfaces of the longitudinal groove 12 of the hinge slider 10 and the stopper pin 9, Accordingly, the opening / closing body 2 can be arbitrarily stopped and held within a certain opening angle range, for example, an opening angle range of 20 ° to 60 °, that is, a free stop function can be exhibited.
[0018]
Thus, as the opening / closing body 2 is greatly opened, the rotation radius r _{2 of the} moment is increased through the longitudinal groove 12 that slides against the stopper pin 9 (see FIG. 2). Therefore, the compression coil spring 14 needs only a small spring force, and can contribute to the miniaturization of the entire hinge 3.
[0019]
When the vertically long groove 12 of the hinge slider 10 slides on the stopper pin 9, a large frictional force can be obtained between the sliding surfaces. Therefore, this frictional force enhances the free stop effect, and when the opening / closing body 2 is closed, even when the opening / closing body 2 is heavy, the falling speed is reduced and the opening / closing body 2 is slowly closed, and the moment in the closing direction generated by the weight of the opening / closing body 2 Can be prevented from falling suddenly, and accidents such as a hand being caught between the opening / closing body 2 and the base 1 can be prevented.
[0020]
【The invention's effect】
According to the present invention, by adopting a mechanism that slides the longitudinal groove of the hinge slider on the movable side hinge body with respect to the stopper pin of the fixed side hinge body when the opening and closing body is opened and closed, As a result, the number of assembly members and the number of assembly steps of the hinge having a free stop function can be reduced, and the overall size of the hinge can be reduced. Moreover, according to the combination of the longitudinal groove of the hinge slider and the stopper pin, there is an effect that the machining accuracy is not so much required as in the cam mechanism, and the assembly process can be easily performed.
[Brief description of the drawings]
FIG. 1 is a longitudinal side view of a hinge when an opening / closing body is fully closed.
FIG. 2 is a longitudinal side view of the hinge when the opening / closing body is half-opened.
FIG. 3 is an exploded perspective view of a hinge.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Base 2 Opening / closing body 3 Hinge 4 Fixed side hinge body 5 Movable side hinge body 8 Hinge pin 9 Stopper pin 10 Hinge slider 11 Horizontally long groove 12 Vertically long groove 14 Compression coil spring

Claims (1)

A fixed-side hinge body attached to a base such as a copying machine main body, and is pivotally connected to the fixed-side hinge body so as to be pivotable in the vertical direction around the hinge pin. A movable-side hinge body attached to the rotation base end side of the opening / closing body
A stopper pin is fixed in parallel to the hinge pin at a position below the hinge pin of the fixed-side hinge body and biased outward in the rotational radial direction of the opening and closing body,
A hinge slider is provided on the movable hinge body so as to be movable in the turning radius direction of the opening / closing body, and the hinge slider is formed in a horizontally long groove parallel to the turning radius direction of the opening / closing body, and in the horizontally long groove. A vertically long groove formed so as to be orthogonal to the horizontal groove, the hinge pin is inserted into the horizontal groove, and the stopper pin is slidably inserted into the vertical groove,
A compression coil spring between the movable side hinge body and the hinge slider that presses and urges the hinge slider inward in the rotational radial direction of the opening / closing body to give a moment in the opening direction to the movable side hinge body The hinge of the opening-closing body characterized by being mounted.

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