JP2001214658A - Hinge for opening and closing body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hinge for an opening and closing body having a free stop function of stopping and holding an opening and closing body such as a manuscript pressing board of a copy machine at an arbitrary opening angle which can be also applied for copying a thick manuscript. SOLUTION: By balancing a moment in open direction by an urging force of a compression coil spring 25, a moment in closed direction by the weight of an opening and closing body 2 and a friction force created between sliding surfaces of the first longitudinal long groove 19 of the first hinge slider 16 and the first stopper pin 13, the opening and closing body 2 can be stopped and held at arbitrary opening angle. When the manuscript is thick, the second movable side hinge body 8 is rotated around the second hinge pin 7, the second stopper pin 24 slides toward the upper end portion inside the second longitudinal long groove 22, while the second hinge slider 17 is slightly compressing the compression coil spring 25, it is moved in an arrow 'd' direction in the hinge body 6 at the first moving side, and the opening and closing body 2 is lifted up and becomes parallel to the thick manuscript P thereby crimping with an uniform pressure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a free stop function which can stop and hold an opening / closing member such as an original cover of a copying machine at an arbitrary opening angle and can be applied to copying of a thick original. The present invention relates to improvement of a hinge of an opening / closing body.

[0002]

2. Description of the Related Art For example, Japanese Patent Publication No. 3-74372 and Japanese Patent Publication No. 3-7481 disclose a hinge of this kind of opening / closing body.
There is one such as 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 side hinge body and the movable side hinge body, and the cam mechanism and the compression coil spring cooperate to maintain a balance with the closing moment due to the weight of the opening / closing body. By this, the opening / closing body can be stopped and held at an arbitrary opening angle, and the movable hinge body is composed of the first support member and the second support member pivotally connected to each other so as to be able to freely bend. It can be used for copying.

[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.

An object of the present invention is to solve such a problem, and it is possible to secure the free stop function and the function of coping with the copying of a thick original while eliminating the need for the cam mechanism. An object of the present invention is to provide a hinge of an opening / closing body which can reduce the number of members and the number of steps of assembling, simplify the structure, and reduce the size.

[0005]

As shown in FIGS. 1 to 4, the present invention relates to a hinge for attaching an openable and closable body 2 to a base 1 such as a copying machine main body so as to freely open and close in a vertical direction. , Fixed hinge 4 attached to base 1
A first movable hinge body 6 whose pivot base end is pivotally connected to the fixed hinge body 4 so as to be rotatable up and down around a first hinge pin 5; and a first movable hinge body. 6 is pivotally connected to the pivoting end of the opening / closing body 2 so as to be pivotable in the vertical direction around the second hinge pin 7 so that the pivoting tip is directed inward in the pivoting radial direction of the opening / closing body 2. A second movable hinge body 8 attached to the moving base end side, and is biased below the first hinge pin 5 of the fixed hinge body 4 and outward in the rotation radial direction of the opening / closing body 2. In this position, the first stopper pin 13 is fixed in parallel with the first hinge pin 5, and is located below the second hinge pin 7 of the second movable hinge body 8 and at a position deviated to the rotation tip side. , Second
The stopper pin 24 is fixed in parallel to the second hinge pin 7, and the first hinge slider 16 and the second hinge slider 17 are arranged on the first movable hinge body 6 in the rotation radius direction of the opening and closing body, respectively. The first hinge slider 16 is provided so as to be movable in the moving radius direction.
Has a first elongated groove 18 formed in a horizontal direction parallel to the rotation radial direction of the opening / closing body 2, and a first elongated groove 19 formed in a vertical direction so as to be orthogonal to the first horizontal groove 18. The first hinge pin 5 is slidably inserted into the first horizontally elongated groove 18, and the first stopper pin 13 is slidably inserted into the first vertically elongated groove 19. Second horizontally elongated groove 21 formed horizontally in parallel with the direction
And a second vertically elongated groove 22 formed to be vertically long so as to be orthogonal to the second horizontally elongated groove 21. The second hinge pin 7 is inserted in the second horizontally elongated groove 21, and the second hinge pin 7 is inserted in the second vertically elongated groove 22. The stopper pins 24 are slidably inserted, and the first hinge slider 16 is always located between the opposing surfaces of the first hinge slider 16 and the second hinge slider 17.
The second hinge slider 17 is pressed toward the inside in the rotation radial direction of the opening / closing body 2 and toward the outside in the rotation radial direction of the opening / closing body, respectively, to apply a moment in the opening direction to the first movable side hinge body 16. That the applied compression coil spring 25 is mounted,
It is characterized by the following.

[0006]

The closing moment acting on the first and second movable hinge bodies is generated by the weight of the opening / closing body attached to the second movable hinge body. The moment becomes smaller, and conversely, as the opening angle becomes smaller, the moment becomes larger. Now, in a state where the opening / closing body is closed in the horizontal posture by the moment in the closing direction due to its weight, the compression coil spring is in the shortest compressed state, and the first hinge pin is in the first elongated groove of the first hinge slider. The first stopper pin is located at the upper end in the first vertically elongated groove, and the second hinge pin is located at the second inner end in the opening / closing body rotation radial direction.
The second stopper pin is located at the lower end in the second vertically elongated groove, and the second stopper pin is located at the inner side end of the hinge slider in the second horizontally elongated groove in the opening / closing body rotation radial direction.

In 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 frictional force generated between the sliding surface between the first longitudinal groove of the first hinge slider and the first stopper pin. The compression coil spring gradually extends, and the first hinge slider moves the inner end of the opening / closing body in the first elongated groove in the radial direction of the rotation of the opening / closing member from the first hinge pin and the upper end of the first elongated groove to the first. The first movable side hinge body gradually moves away from the stopper pin and moves radially inward from the first movable side hinge body. At this time, 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 first longitudinal groove of the first hinge slider and the first stopper pin are balanced. Thereby, a free stop function for stopping and holding the opening / closing body at an arbitrary opening angle is exhibited.

Further, since the turning radius of the moment increases through the first longitudinal groove which slides with respect to the first stopper pin as the opening / closing body opens largely, the compression coil spring requires only a small spring force. When the first longitudinal groove of the first hinge slider slides against the first stopper pin, the frictional force between the sliding surfaces can be increased, so that the closing caused by the free stop effect and the weight of the opening / closing body is achieved. It is possible to enhance a damper effect for preventing a sudden drop phenomenon due to a directional moment.

When the opening / closing member is opened at a certain angle and the document placed on the base is a thick material, the second movable hinge member is pressed by pressing the opening / closing member against the thick document. Pivots around the second hinge pin in the upward direction so that the tip end of the pivot moves away from the first movable hinge body upward, and the second stopper pin slides from the lower end to the upper end in the second elongated groove. The second hinge slider moves inside the first movable hinge body in the radial direction of the opening and closing body while slightly compressing the compression coil spring, and the opening and closing body lifts up the rotation base end side thereof. Is parallel to the thick manuscript,
The opening / closing body presses the entire thick document on the base with an even pressure distribution.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional side view of a hinge when the opening / closing body according to the present invention is fully closed, FIG. 2 is a longitudinal sectional side view of the hinge when the opening / closing body is half-opened, and FIG. 3 is a longitudinal section showing a use state when a thick original is used. FIG. 4 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 a document pressing plate, and 3 denotes a hinge according to the present invention. Freely attached. The hinge 3 includes a fixed hinge body 4 attached to the base 1 with a screw (not shown), and a fixed hinge body 4 having a first hinge pin
A first movable hinge body 6 pivotally connected so as to be rotatable in the vertical direction around the first movable hinge body 6; A second movable side hinge body which is pivotally connected to the second hinge pin 7 so as to turn in the vertical direction so as to face inward in the radial direction, and is attached to a rotation base end side of the opening / closing body 2 with a screw (not shown) or the like. 8 is provided.

As shown in FIG. 4, 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.
The first hinge pin pivotal support holes 9, 9 are provided on the upper end side of the side plates 4b, 4b. Further, the position of the side plates 4b, 4b below the first hinge pin pivot holes 9, 9 and deviated outward in the rotation radial direction of the opening / closing body 2 is:
First stopper pin support holes 10 are provided.

On the other hand, the first movable side hinge body 6 has a bottom plate 6a.
And side plates 6b, 6 raised from both ends of the bottom plate 6a.
b, and lip 6c, 6c bent inward from the side plates 6b, 6b in parallel with the bottom plate 6a. A lip-shaped groove-shaped cross section is formed at one end of the side plates 6b, 6b on the rotation base end side. One hinge pin pivot holes 11, 11 are provided, and the side plates 6b,
6b, a second hinge pin pivotal support hole 12,
12 are provided. The first movable hinge body 6 is formed by aligning the first hinge pin pivot holes 11, 11 of the side plates 6b, 6b with the first hinge pin pivot holes 9, 9 of the fixed hinge body 4. When the first hinge pin 5 is inserted through the first hinge pin 5, the first hinge pin 5 is pivotally connected to the fixed side hinge body 4 so as to be rotatable vertically around the first hinge pin 5. First stopper pin support hole 1 in side plates 4b, 4b of fixed hinge body 4
A first stopper pin 13 is inserted into and fixed to 0 and 10 in parallel with the first hinge pin 5.

The second movable hinge body 8 includes an upper plate 8a attached to a rotation base end side of the opening / closing body 2 with screws (not shown) or the like.
Side plates 8b, 8b bent downward from both ends of the upper plate 8a
The second hinge pin pivotal support holes 14, 14 are provided on the rotation base end side of the side plates 8b, 8b. The upper plate 8a of the second movable hinge body 8 is different from the first movable hinge body 6 in the lip 6 of the first movable hinge body 6.
On the upper side of c, 6c, the side plates 8b, 8b overlap the outer sides of the side plates 6b, 6b of the first movable side hinge body 6, respectively, and the turning end faces inward in the turning radial direction of the opening / closing body 2. Second hinge pin pivot holes 14, 1 that match each other
By inserting the second hinge pin 7 into the second hinge pin 2, the second hinge pin 7 is pivotally connected to the first movable hinge body 6 so as to be rotatable vertically around the second hinge pin 7. Further, the side plates 8b, 8b
The second stopper pin support holes 15 are provided below the second hinge pin pivot support holes 14 and at positions deviated toward the rotation tip side.
The second stopper pins 24 are inserted into and fixed to 5, 5.

A first hinge slider 16 and a second hinge slider 17 are provided on the first movable hinge 6 so as to be movable in the direction of the turning radius of the opening / closing body 2, respectively. The first hinge slider 16 is formed of a polyacetal-based resin or a polyamide-based resin having excellent wear resistance. The first hinge-slider 16 has a first horizontally elongated groove 18 that is horizontally elongated in parallel with the rotation radial direction of the opening / closing body 2. A first vertically elongated groove formed vertically below the groove and perpendicular to the first horizontally elongated groove at a position deviated outward in the rotation radial direction of the opening / closing body; 20 is formed to face outward in the rotation radial direction of the opening / closing body 2.

The second hinge slider 17, like the first hinge slider 16, is formed of a polyacetal-based resin or a polyamide-based resin having excellent wear resistance, and is formed to be horizontally long in parallel with the rotation radius direction of the opening / closing body 2. 2nd horizontal groove 21
And a second vertically elongated groove 22 formed vertically below the second horizontally elongated groove 21 and at a position deviated inward in the rotation radial direction of the opening / closing body 2 so as to be orthogonal to the second horizontally elongated groove 21. At the same time, the spring receiving wall portion 23 is formed to face inward in the rotation radial direction of the opening / closing body 2.

The first hinge slider 16 is slidably fitted in the turning radial direction of the opening / closing body 2 between the bottom plate 6a and the lip 6c on the turning base end side of the first movable hinge body 6, and The first hinge pin 5 and the first stopper pin 13 are slidably inserted into the first horizontally elongated groove 18 and the first vertically elongated groove 19, respectively. As means for slidingly guiding the first hinge slider 16 to the first movable-side hinge body 6 in the rotation radial direction of the opening / closing body 2, a convex portion 16 a is provided on the upper surface of the first hinge slider 16. The portion 16a is the first
The movable side hinge body 6 is slidably fitted in the gap between the opposed edges of the lips 6c, 6c.

The second hinge slider 17 fits between the bottom plate 6a and the lip 6c of the first movable hinge body 6 at the tip end of rotation, so as to be slidable in the radial direction of rotation of the opening / closing body 2. The second hinge pin 7 and the second stopper pin 24 are slidably inserted into the two horizontally long grooves 21 and the second vertically long grooves 22 respectively. As means for slidingly guiding the second hinge slider 17 with respect to the first movable hinge body 6 in the rotation radial direction of the opening / closing body 2, a convex portion 17 a is provided on the upper surface of the second hinge slider 17. Part 17a is the first
The lip 6c of the movable hinge body 6 is slidably fitted in the gap between the notches 6d, 6d at the opposite edges of the lip 6c.

A compression coil spring 25 is interposed between the spring receiving cylinder 20 of the first hinge slider 16 and the spring receiving wall 23 of the second hinge slider 17. The compression coil spring 25 constantly applies a moment in the opening direction to the first movable side hinge body 6 by urging the first hinge slider 16 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 4 is attached to the base 1 and the second movable hinge 8 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 25 is in a compressed state, and the first hinge pin 5 is attached to the inner end 18a of the first hinge slider 16 in the first horizontally elongated groove 18 in the opening / closing member turning radial direction by the first hinge pin. The stopper pin 13 is the first longitudinal groove 1
9 at the upper end 19a. On the other hand, the second hinge pin 7 is attached to the inner side end 21 a of the second hinge slider 17 in the opening / closing member turning radial direction in the second elongated groove 21.
The second stopper pin 24 is located at the lower end 2 in the second elongated groove 22.
2a. When the opening / closing body 2 is fully closed in the horizontal posture, the magnitude of the moment in the closing direction caused by the weight of the opening / closing body 2 and the magnitude of the moment in the opening direction caused by the urging force of the compression coil spring 25 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 first moment of the first hinge slider 16
As shown in FIG. 2, the opening / closing body 2 is moved to the first position against the frictional force generated between the sliding surface of the vertically elongated groove 19 and the first stopper pin 13.
As it opens upward (in the direction of arrow a) around the hinge pin 5, the compression coil spring 25 gradually expands, and the first hinge slider 16 moves inward in the opening / closing member rotating radial direction within the first horizontally elongated groove 18. The end 18a is moved from the first hinge pin 5 to the first
The upper end 19a in the longitudinal groove 19 is fixed to the first stopper pin 13
From the first movable side hinge body 6 and moves inward (in the direction of arrow b) in the opening / closing body rotation radial direction.
At this time, the moment in the opening direction due to the urging force of the compression coil spring 25, the moment in the closing direction due to the weight of the opening / closing body 2, and the sliding surface between the first vertical groove 19 of the first hinge slider 16 and the first stopper pin 13. The opening / closing body 2 is opened at a certain opening angle by balancing the frictional force generated between them.
For example, it can be stopped and held arbitrarily within the range of the opening angle of 20 ° to 60 °, that is, the free stop function can be exhibited.

As described above, as the opening / closing body 2 is widely opened, the turning radius r _{2 of the} moment increases through the first vertically elongated groove 19 which slides with respect to the first stopper pin 13 (see FIG. 2). Therefore, the compression coil spring 25 requires only a small spring force, and can contribute to the size reduction of the entire hinge 3.

The first longitudinal groove 1 of the first hinge slider 16
By sliding the 9 against the first stopper pin 13, a large frictional force can be obtained between the sliding surfaces. Therefore, the free stop effect is enhanced by this frictional force, and when the opening / closing body 2 is closed, even if the opening / closing body 2 is heavy, the falling speed is reduced and the opening / closing body 2 is closed slowly. Is prevented from suddenly falling, and an accident such as pinching a hand between the opening / closing body 2 and the base 1 can be prevented.

Thus, the opening / closing body 2 is opened at a certain angle,
When the document placed on the base 1 is a thick material, as shown in FIG. 3, when the opening / closing body 2 is pressed against the thick document P, the second movable hinge body 8 causes the second hinge pin 7 to move. The second stopper pin 24 pivots upward in the upward direction (in the direction of the arrow c) in which the tip end of the pivot moves away from the first movable hinge body 6 upward, and the second stopper pin 24 moves from the lower end 22 a in the second elongated groove 22. The second hinge slider 17 slides toward the upper end, and moves inside the first movable hinge body 6 radially inward (in the direction of arrow d) in the first movable side hinge body 6 while slightly compressing the compression coil spring 25. The opening / closing member 2 is lifted up at the rotation base end side thereof to be parallel to the thick document P, and the opening / closing member 2 presses the entire thick document P on the base 1 with uniform pressure. Can be.

[0025]

According to the present invention, a mechanism for sliding the first vertical groove of the first hinge slider on the first movable hinge body side with respect to the first stopper pin of the fixed hinge body with opening and closing of the openable body is provided. By adopting such a structure, a cam mechanism such as a conventional hinge can be omitted, so that the number of assembling members and assembling steps of a hinge having a free stop function can be reduced, and the size of the entire hinge can be reduced. In addition, the first vertical groove of the first hinge slider and the first
According to the combination with the stopper pin, processing accuracy is not so required as in the case of a cam mechanism, and it is advantageous because it can be easily assembled.

Further, in the present invention, the rotation base end of the second movable hinge attached to the rotation base of the opening / closing body is connected to the first movable side so as to cope with copying of a thick original. A second hinge slider having second vertically elongated grooves orthogonal to the first movable hinge body is connected to the first movable hinge body while being pivotally connected to the pivoting tip side of the hinge body so as to be vertically rotatable around a second hinge pin. The slider is provided side by side via the compression coil spring, and the second horizontally elongated groove is slidably inserted into the second hinge pin, and the second vertically elongated groove is slidably inserted into the second stopper pin on the second movable hinge body. A lift-up mechanism for the opening / closing body is provided, and this mechanism has an effect that it can be easily assembled as compared with a conventional mechanism using a cam mechanism such as a hinge.

[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 a vertical sectional side view showing a use state in the case of a thick original.

FIG. 4 is an exploded perspective view of a hinge.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base 2 Opening / closing body 3 Hinge 4 Fixed hinge body 5 1st hinge pin 6 1st movable hinge body 7 2nd hinge pin 8 2nd movable side hinge body 13 1st stopper pin 16 1st hinge slider 17 2nd hinge slider 18 First horizontally elongated groove 19 First vertically elongated groove 21 Second horizontally elongated groove 22 Second vertically elongated groove 24 Second stopper pin 25 Compression coil spring

Claims (1)

[Claims] 1. A hinge for attaching an openable and closable body to a base such as a copying machine main body so that the openable and closable body can be freely opened and closed in a vertical direction, the fixed hinge being attached to the base, and the hinge being fixed to the fixed hinge. A first movable hinge body having a base end pivotally connected to the first hinge pin so as to be rotatable up and down around a first hinge pin; and a pivotable distal end provided on the pivotable distal end of the first movable hinge body. A second movable side hinge body that is pivotally connected in a vertically rotatable manner around a second hinge pin so as to face inward in the rotation radial direction, and is attached to a rotation base end side of the opening / closing body. A first stopper pin is fixed at a position below the first hinge pin of the fixed hinge body and at a position deviated outward in the rotation radial direction of the opening / closing body in parallel with the first hinge pin; 2 From the second hinge pin of the movable hinge body The second stopper pin is fixed parallel to the second hinge pin at a position which is also downward and biased toward the tip of the rotation, and the first hinge slider and the second hinge slider are respectively opened and closed by the first movable hinge body. A first hinge slider is provided so as to be movable in the rotation radius direction of the body. The first hinge slider has a first horizontally long groove formed in a horizontal direction parallel to the rotation radius direction of the opening and closing body. A first vertically elongated groove formed so as to be orthogonal to the one horizontally elongated groove, and the first hinge pin is slidably inserted into the first horizontally elongated groove, and the first stopper pin is slidably inserted into the first vertically elongated groove. The second hinge slider has a second horizontally long groove formed in a horizontal direction in parallel with the rotation radial direction of the opening and closing body, and a second vertically long groove formed in a vertically long direction perpendicular to the second horizontally long groove. And the second elongated groove has the second The second stopper pin is slidably inserted in the second vertically elongated groove, and the first hinge slider is always opened and closed between the opposing surfaces of the first hinge slider and the second hinge slider. A compression coil spring that presses and biases the second hinge slider toward the outside in the rotation radial direction of the opening / closing body and applies a moment in the opening direction to the first movable side hinge body is mounted inward in the rotation radial direction. The hinge of the opening / closing body, wherein the hinge is provided.