JP2001209139A - Hinge for opening and closing body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hinge provided with a free-stop function to stop and hold an opening/closing body such as the original press-contacting plate of a copying machine by an arbitrary angle. SOLUTION: A compression coil spring 14 is compressed in a state that the opening/closing body 2 is in a horizontal posture, and a hinge pin 8 is positioned at an inner side end part 11a in an opening/closing body turning radial, direction at the inside of the long sideway groove 11 of a hinge slider 10, and a stopper pin 9 is respectively positioned at an upper end part 12a at the inside of a vertically long groove 12, and when the opening/closing body 2 is opened upward around the hinge pin 8 from this state, the compression coil spring 14 is gradually elongated, and the hinge slider 10 is moved in the opening/ closing body turning radial direction from a movable side hinge body 5 by respectively gradually separating the inside end part 11a in the opening/ closing body turning radial direction at the inside of the long sideway groove 11 from the hinge pin 8 and the upper end part 12a at the inside of the vertically long groove 12 from the stopper pin 9. Then, the opening/closing body 2 is stopped and held by the arbitrary opening angle.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a hinge having a free stop function which can stop and hold an opening / closing member such as a document pressing plate of a copying machine at an arbitrary opening angle.

[0002]

2. Description of the Related Art A hinge of this kind of opening / closing body is disclosed, for example, in Japanese Utility Model Laid-Open Publication No. Hei 3-2628 and Japanese Patent Publication No. 3-74372.
There are some which are disclosed in Japanese Patent Publication No. There, a fixed side hinge body attached to a base such as a copying machine main body, and a pivotally connected to the fixed side hinge body so as to be rotatable up and down around a hinge pin, and openable and closable vertically with respect to the base. And a movable hinge body attached to the rotation base end side of the opening / closing body installed in the vehicle. A cam mechanism and a compression coil spring are provided between the fixed hinge body and the movable hinge body, and the cam mechanism and the compression coil spring cooperate to keep a balance with the closing moment due to the weight of the opening / closing body. The opening and closing member can be stopped and held at an arbitrary opening angle.

[0003]

However, the hinge of the opening / closing body requires a cam mechanism in addition to the compression coil spring. However, the use of the cam mechanism requires a large number of members and man-hours for assembly. The structure becomes complicated and large,
The cost was also high.

SUMMARY OF THE INVENTION An object of the present invention is to solve such a problem. By omitting the cam mechanism, the number of assembly members and the number of man-hours can be reduced, and the structure can be simplified and the size can be reduced. An object of the present invention is to provide a hinge of an opening / closing body which can be realized.

[0005]

SUMMARY OF THE INVENTION The present invention relates to FIGS.
As shown in FIG. 1, a fixed hinge 4 attached to a base 1 such as a copying machine main body, and a pivotally connected to the fixed hinge 4 so as to be rotatable vertically around a hinge pin 8, and to the base 1. A movable hinge body 5 attached to the turning base end side of the opening / closing body 2 which is installed to be openable and closable in the up and down direction, below the hinge pin 8 of the fixed hinge body 4. A stopper pin 9 is fixed at a position deviated outward in the rotation radial direction of the opening / closing body 2 in parallel with the hinge pin 8.
The hinge slider 10 is provided so as to be movable in the rotation radial direction of the opening and closing body 2. The hinge slider 10 has a horizontally elongated groove 11 formed in a horizontal direction parallel to the rotation radial direction of the opening and closing body 2.
And a vertically elongated groove 12 formed to be vertically elongated so as to be orthogonal to the horizontally elongated groove 11. The hinge pin 8 is slidably inserted into the horizontally elongated groove 11, and the stopper pin 9 is slidably inserted into the vertically elongated groove 12. The movable hinge body 5
A compression coil spring 14 which constantly presses and biases the hinge slider 10 inward in the radial direction of rotation of the opening / closing body 2 to apply a moment in the opening direction to the movable hinge body 5 between the hinge slider 10 and the hinge slider 10. Is mounted.

[0006]

The closing moment acting on the movable hinge is generated by the weight of the opening / closing member attached to the movable hinge. When the opening angle of the movable hinge is increased, the moment is reduced. As the angle decreases, 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 rotating radial direction in the horizontally long groove of the hinge slider. The stopper pin is located at the upper end in the longitudinal groove, respectively.

From this state, when the opening and closing body is opened against the moment in the closing direction due to the weight of the opening and closing body and the frictional force generated between the sliding surface of the hinge slider and the vertically long groove and the stopper pin, the compression coil spring gradually turns. Extending, the hinge slider pivots the opening and closing body in the horizontal elongated groove.The opening and closing body pivots from the movable hinge body by gradually separating the inner end in the radial direction from the hinge pin and the upper end in the vertical groove from the stopper pin. Move inward in the radial direction. At this time, the opening / closing body is arbitrarily opened 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 between the vertically elongated groove of the hinge slider and the stopper pin. A free stop function to stop and hold at an angle is exhibited.

In addition, since the turning radius of the moment increases through the vertically elongated groove that slides with respect to the stopper pin as the opening and closing body opens largely, the compression coil spring needs only a small spring force. Since the longitudinal groove of the hinge slider slides against the stopper pin, the frictional force between the sliding surfaces can be increased, so that the free stop effect and the sudden moment due to the moment in the closing direction caused by the weight of the opening / closing body. The damper effect for preventing the falling phenomenon can be enhanced.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a vertical side view of the hinge when the opening / closing body according to the present invention is fully closed, FIG. 2 is a vertical side view of the hinge when the opening / closing body is half-opened, and FIG. 3 is an exploded perspective view of the hinge.

In FIG. 1, reference numeral 1 denotes a base such as a copying machine main body, 2 denotes an opening / closing body such as an original pressing plate, and 3 denotes a hinge according to the present invention. Freely attached. The hinge 3 includes a fixed side hinge body 4 attached to the base 1 with screws (not shown) and an opening and closing body 2.
And a movable hinge body 5 attached to a turning base end side of the device with screws (not shown) or the like.

As shown in FIG. 3, the fixed side hinge body 4 is
Bottom plate 4a attached to base 1 with screws or the like (not shown)
And side plates 4b, 4b raised from both ends of the bottom plate 4a.
And pivot support holes 6 and 6 are provided at the upper end side of the side plates 4b and 4b. Further, the side plates 4b, 4b
The stopper pin support holes 15 and 1 are located below the pivot holes 6 and 6 and offset outward in the rotation radial direction of the opening / closing body 2.
5 are provided.

On the other hand, the movable hinge body 5 includes a bottom plate 5a,
Side plates 5b, 5b raised from both ends of the bottom plate 5a,
And a lip-shaped groove section having lips 5c, 5c bent inward from the side plates 5b, 5b in parallel with the bottom plate 5a, and a pivotal support hole is formed at one end of the side plates 5b, 5b on the rotation base end side. 7 is provided, and a spring receiving plate portion 5d is raised at an end of the bottom plate 5a on the rotation tip side. The movable hinge body 5 is formed by inserting the hinge pins 8 into the pivot holes 7, 6 by aligning the pivot holes 7, 7 of the side plates 5b, 5b with the pivot holes 6, 6 of the fixed hinge body 4. It is pivotally connected to the fixed side hinge body 4 so as to be rotatable up and down around a hinge pin 8. A stopper pin 9 is inserted into and fixed to the stopper pin support holes 15 of the side plates 4 b of the fixed side hinge body 4 in parallel with the hinge pin 8.

The movable side hinge member 5 includes a hinge slider 1
0 is provided. The hinge slider 10 is formed of a polyacetal-based resin or a polyamide-based resin having excellent wear resistance. The hinge slider 10 has a horizontally elongated groove 11 formed in parallel with the rotation radius direction of the opening / closing body 2, and a lower portion of the horizontally elongated groove 11. And a horizontally elongated groove 1 at a position deviated outward in the rotation radial direction of the opening / closing body 2.
1 and a vertically elongated groove 12 which is formed to be vertically long at right angles, and a spring receiving cylinder portion 13 is formed so as to face outward in the rotation radial direction of the opening / closing body 2.

The hinge slider 10 is slidably fitted between the bottom plate 5a of the movable hinge body 5 and the lip 5c in the radial direction of rotation of the opening / closing body 2, and the hinge pin 8 is fitted in the elongated groove 11. The stopper pin 9 is inserted into the longitudinal groove 12.
Are slidably inserted respectively. As means for slidingly guiding the hinge slider 10 straight on the movable hinge body 5 in the direction of the turning radius of the opening / closing body 2, a convex portion 10a is provided on the upper surface of the hinge slider 10, and this convex portion 10a is attached to the movable hinge. The lip 5c of the body 5 is slidably fitted in the gap between the opposed edges of the lip 5c.

The spring receiving cylinder 13 of the hinge slider 10
The compression coil spring 14 is interposed between the movable hinge member 5 and the spring receiving plate portion 5d. This compression coil spring 14
Always applies a moment in the opening direction to the movable hinge body 5 by urging the hinge slider 10 inward in the rotation radial direction of the opening / closing body 2.

Next, the operation of the hinge 3 having the above-described structure in which the fixed hinge body 4 is attached to the base 1 and the movable hinge body 5 is attached to the rotation base end of the opening / closing body 2 will be described. FIG. 1 shows a state 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, and the hinge pin 8 is connected to the hinge slider 10.
Inner end 11 in the opening / closing body rotation radial direction of the horizontally elongated groove 11
a, the stopper pin 9 is located at the upper end 12a in the longitudinal groove 12.
Are located respectively. When the opening / closing body 2 is fully closed in the horizontal posture, 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 urging force of the compression coil spring 14 are balanced. Is held by

From the fully closed state, the moment in the closing direction due to the weight of the opening / closing body 2 and the longitudinal groove 1 of the hinge slider 10
When the opening / closing body 2 is opened upward around the hinge pin 8 against the frictional force generated between the sliding surfaces of the sliding pin 2 and the stopper pin 9, the compression coil spring 14 gradually expands as shown in FIG. The hinge slider 10 gradually separates the inner end 11a of the opening / closing body in the horizontal groove 11 from the hinge pin 8 in the radial direction of the opening and closing body and the upper end 12a of the vertical groove 12 from the stopper pin 9 gradually. From the opening and closing body rotation radial direction. At this time, the moment in the opening direction due to the urging 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 surface of the vertically elongated groove 12 of the hinge slider 10 and the stopper pin 9. Can be arbitrarily stopped and held within a certain opening angle range, for example, a range of 20 ° to 60 °, that is, a free stop function can be exhibited.

As described above, as the opening / closing body 2 opens greatly, the turning radius r _{2 of the} moment increases through the longitudinal groove 12 which slides on the stopper pin 9 (see FIG. 2). Therefore, the compression coil spring 14 requires only a small spring force, and can contribute to the size reduction of the entire hinge 3.

When the longitudinal groove 12 of the hinge slider 10 slides with respect to the stopper pin 9, a large frictional force can be obtained between the sliding surfaces. Therefore, the free stop effect is enhanced by this frictional force,
When the opening / closing body 2 is closed, even when the opening / closing body 2 is heavy, the falling speed is reduced and the body is slowly closed, and a sudden drop due to the moment in the closing direction caused by the weight of the opening / closing body 2 is prevented. It is possible to prevent an accident such as putting a hand between the two.

[0020]

According to the present invention, a conventional hinge is provided by adopting a mechanism for sliding the vertical groove of the hinge slider on the movable hinge body side with respect to the stopper pin of the fixed hinge body with opening and closing of the openable body. Therefore, the number of assembly members and the number of assembling steps of a hinge having a free stop function can be reduced, and the size of the entire hinge can be reduced. Further, according to the combination of the vertically elongated groove of the hinge slider and the stopper pin, there is an effect that machining accuracy is not so required as in the case of a cam mechanism, and the assembly can be easily performed.

[Brief description of the drawings]

FIG. 1 is a vertical sectional side view of a hinge when the opening / closing body is fully closed.

FIG. 2 is a longitudinal sectional side view of a 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 Horizontal slot 12 Vertical slot 14 Compression coil spring

Claims (1)

[Claims] A fixed hinge attached to a base such as a copying machine main body; and a hinge connected to the fixed hinge so as to be rotatable up and down around a hinge pin. A movable hinge body attached to a rotation base end side of the opening / closing body that is movably installed; and a lower part than the hinge pin of the fixed hinge body and a rotation radially outward of the opening / closing body. A stopper pin is fixed at a position deviated in parallel with the hinge pin, and a hinge slider is provided on the movable hinge body so as to be movable in a rotation radial direction of the opening and closing body. It has a horizontally long groove formed horizontally long in parallel with the dynamic radius direction, and a vertically long groove perpendicular to the horizontally long groove, wherein the hinge pin is provided in the horizontally long groove, and the strike pin is provided in the vertically long groove. Per pin are slidably inserted respectively between said hinge slider and the movable-side hinge member,
A hinge for an opening / closing body, characterized in that a compression coil spring that always presses and biases the hinge slider inward in the rotation radial direction of the opening / closing body and gives a moment in the opening direction to the movable hinge body is mounted. .