JPH04238983A - Hinge device - Google Patents

Abstract

PURPOSE:To obtain a function to rotate a rotating member and a buffer by combining a plurality of turning effort converters consisting of a combination of cams and sliders in series. CONSTITUTION:A casing 2 fixed to a fixed member is penetrated to provide a shaft 3 so that it is capable of rotating. Cams 12 of turning effort converters 5 are penetrated to the shaft 3 so that the surfaces of the cams are brought into contact with projections of sliders 11, and a plurality of turning efforts converts 5 are combined. A compression spring 4 is inserted into the shaft 3 from the outside and, at the same time, one end of the spring 4 is brought into contact a staple 10 of a side face plate 6, and the other end thereof is brought into contact with the turning effort converters 5. According to the constitution, spring force of the compression spring 4 is converted into turning effort to move the sliders 11 downward of the surfaces of the cams by the converters 5, and it is transferred to the shaft 3 through the sliders 11.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to a hinge device for a rotating member, such as a door or a lid, which rotates relative to a rotating member. This invention relates to a hinge device with functions.

0002

2. Description of the Related Art A conventional shock absorbing device that combines a spring and a cam is disclosed in Japanese Patent Application Laid-Open No. 2-180321. This shock absorber includes a slider that is attached to rotate integrally with a shaft and move in the axial direction of the shaft, a coil spring that biases the slider to move in the axial direction of the shaft, and a coil spring that urges the slider to move in the axial direction of the shaft. and a cam formed with a cam surface that slides into contact with the slider and moves the slider in a direction that deflects the spring as the shaft rotates. In this case, the cam is free to rotate relative to the shaft and is fixed to a suitable fixing member.

[0003]The shaft of this shock absorbing device is attached to a rotating member such as a door or a lid, and rotates integrally with the rotation of these members during opening and closing operations. When the slider slides along the cam surface due to this rotation of the shaft, the slider moves along the shaft in the direction of the coil spring, thereby deflecting the coil spring. This increases the load on the coil spring, increases the pressing force of the slider against the cam surface, and increases the sliding resistance of the slider on the cam surface. The sliding resistance of the slider absorbs the rotational force applied to the shaft, prevents rapid rotation of the shaft, and provides a buffering effect.

0004

[Problems to be Solved by the Invention] As described above, the conventional shock absorbing device exhibits a buffering effect by increasing the cam surface pressure of the force generated by the spring pressing the slider against the cam. When considering this, it was not possible to increase the rotational torque applied to the rotating member. For this reason, in order to apply the rotational torque, a means for applying other rotations is required, resulting in problems in that the number of parts increases and the structure becomes complicated.

The present invention has been made in view of the above-mentioned circumstances, and its purpose is to provide a hinge device that has a function of rotating a rotating member by a combination of a spring and a cam, and a buffer function. .

[0006]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a hinge device for a rotating member that rotates relative to a fixed member, including a casing fixed to the fixed member;
a shaft rotatably attached to the casing and linked to the rotating member; a spring externally inserted onto the shaft and inserted into the casing; a slider that rotates integrally with the shaft; a rotational force conversion mechanism that is installed between the casing and the spring and converts the spring force of the spring into rotational force, the mechanism being combined with the inserted cam so as to mutually move in the axial direction of the shaft as the shaft rotates; It is characterized in that two or more of the rotational force conversion mechanisms are installed in series in the axial direction of the shaft.

[0007] A protrusion that slides on the cam surface of the cam is formed on the surface of the slider facing the cam, and the cam surface generates a torque that rotates the slider in the direction of the trough between the top and the trough. It is desirable that an arcuate cam surface is formed having a curvature that is approximately constant.

[0008] Further, recesses may be formed in the top and trough portions of the cam surface, respectively, so that the protrusions of the slider engage with each other to stop the rotation of the slider.

Furthermore, the projections may be formed on both sides of the slider, and the cam surfaces may be formed on both sides of the cam.

[0010] The slider of the rotational force converting mechanism that comes into contact with the spring may be provided with a skirt portion that covers the end of the spring.

The spring may be a compression spring, a disc spring, or a torsion spring having one end engaged with the casing and the other end engaged with the slider of the rotational force conversion mechanism.

Furthermore, viscous grease may be applied between the slider and the cam, and between these and the casing.

[0013]

[Operation] The pressing force of the spring is converted into rotational force by the rotational force conversion mechanism. This rotational force causes the shaft to rotate. This rotational force is added by two or more rotational force conversion mechanisms and becomes a rotational torque sufficient to rotate the rotating member.

[0014] In the case where the cam has an arcuate cam surface between the top and the valley where the rotational torque is approximately constant,
In particular, for a rotating member such as a door that rotates around a vertical axis, there is no increase or decrease in load during rotation.

Furthermore, by forming recesses in the top and valley portions of the cam surface, the sliding of the slider on the cam surface can be stopped at the recesses, thereby stopping the rotation of the rotating member. Moreover, when the protrusion of the slider engages with the recess of the valley, the rotational torque in the same direction increases, allowing the slider to be closed or opened.

The skirt portion provided on the slider and covering the end of the spring prevents the spring from buckling, and by filling the outer periphery of the skirt portion with viscous grease, the cushioning effect is made more rigid.

When a torsion spring is used as the spring,
In addition to the pressing force between the slider and the cam, the rotational torque is increased.

The applied viscous grease also reinforces the buffering effect.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained in detail below based on illustrated embodiments. 1 to 18 show a hinge device 1 according to a first embodiment of the present invention. The hinge device 1 includes a casing 2 fixed to a fixed member (not shown), a shaft 3 rotatably provided through the casing 2, a compression spring 4 mounted in the casing 2, and a rotation shaft 3. It is roughly composed of a force conversion mechanism 5.

As shown in FIGS. 6 to 9, the casing 2 has a circular hole 2a formed therethrough in the longitudinal direction, and a longitudinal engagement groove 2b is formed in the peripheral wall of the circular hole 2a along the inner circumference. They are formed at equal intervals. Furthermore, a screw hole 2c for attachment to a fixing member is formed in the casing 2.

As shown in FIGS. 10 and 11, the shaft 3 is formed by D-cutting a round bar from both sides, and has a substantially elliptical cross section. This shaft 3 passes through the circular hole 2a, and has both ends thereof projected outward from side plates 6, 7 covering both end openings of the casing 2, and E-rings 8, 9 are fitted into these projections. It is attached to the casing 2 to prevent it from coming off. The shaft 3 is rotatably attached to the casing 2 and rotates together with the side plates 6 and 7.

As shown in FIGS. 4 and 5, the compression spring 4 is fitted onto the shaft 3, and has one end in contact with a spring seat 10 that is in contact with the side plate 6, and the other end in contact with the rotational force conversion mechanism 5. It is mounted in the circular hole 2a.

One unit of the rotational force converting mechanism 5 at this time is composed of a slider 11 and a cam 12, and the other end of the compression spring 4 is in contact with the slider 11.

As shown in FIGS. 12 to 15, the slider 11 is provided with protrusions 13, 13 at point-symmetrical positions on one side of the disc, and a shaft hole 14 corresponding to the cross-sectional shape of the shaft 3 is bored in the center. has been formed. This slider 11 is installed in the circular hole 2a of the casing with the shaft hole 14 inserted into the shaft 3. After installation, the slider 11 slides its outer peripheral surface against the inner wall of the circular hole 2a with respect to the casing 2. The shaft 3 is free to rotate, is rotationally restrained relative to the shaft 3, and is movable in the axial direction.

Further, as shown in FIGS. 16 to 18, the cam 12 has cam surfaces 17, 17 provided at point-symmetrical positions on one side of a disc, and a circular hole 15 into which the shaft 3 can be loosely inserted. has been formed. Projections 16 are provided on the outer peripheral surface of the cam 12 at equal intervals.

The cam surface 17 has a valley recess 18 provided in the valley.
and a top recess 19 provided at the top, and the recesses 18 and 19.
It is formed from an arcuate cam surface 20 provided between. The cam surface 17 at this time is formed as shown in the developed view shown in FIG.

That is, a valley recess 18 is formed below the arcuate cam surface 20 with a steep slope, and an apex recess 19 is formed above it, which is slightly recessed from the arcuate cam surface 20. The arcuate cam surface 20 is formed such that its inclination angle gradually decreases from the bottom to the top so that a substantially constant rotational torque can be obtained even when the spring force of the compression spring 4 increases. As shown in FIGS. 20 and 21, even if the spring force of the compression spring 4 increases (P1 < P3
), the same rotational torque T can be obtained by reducing the inclination angle of the arcuate cam surface 20.

The cam 12 formed in this manner allows the shaft 3 to pass through the circular hole 15 so that the cam surface 17 of the cam 12 comes into contact with the protrusion 13 of the slider 11. In this transparent state, the cam 12 is free to rotate relative to the shaft 3 and is movable in the axial direction of the shaft 3.

The cam 12 is installed in the casing 2 with the shaft 3 passing therethrough. After this installation, the protruding part 1
6 is engaged with the engagement groove 2b of the casing, the rotation of the cam 12 is restrained relative to the casing 2, and the cam 12 becomes movable in the axial direction of the shaft 3.

In this way, the rotational force conversion mechanism 5 is connected to the slider 1.
1 and the cam 12 constitute one unit, and in this embodiment, this rotational force conversion mechanism 5 consists of five rotational force conversion mechanisms 5 arranged in series and sandwiched between the other end of the compression spring 4 and the side plate 8, as shown in FIGS. 4 and 5. It is installed in the casing 2 in such a way that the

In the hinge device 1 assembled as described above, the spring force of the compression spring 4 is converted by the rotational force conversion mechanism 5 into a rotational force that moves the slider 11 below the cam surface 17, and this rotational force is applied to the slider. 11 to the shaft 3. The relationship between the rotation torque of the shaft 3 and the rotation angle of the slider 11 on the cam surface 17 at this time is as shown in FIG.
The rotational torque T is constant within the rotation angle range of 20° to 110° in which the cam slides on the top, and the valley recess 18 is formed in the rotation range of 0° to 20° where the circular cam surface 20 falls into the valley recess 18. Due to the steep inclination of the cam surface 17 for this purpose, the rotational torque T suddenly increases. and slider 11
In this case, the protrusion 13 retracts (0°) into the valley recess 18, and its rotation is prevented. Further, in the rotation range of 110° to 130° in which the protrusion 13 of the slider 11 retracts into the top recess 19, the arcuate cam surface 20 is rotated to form the top recess 19.
Since an opposite slope is formed, rotational torque in the opposite direction is obtained, and the rotation is inhibited by recessing into the top recess 19 (130°).

As described above, the rotational stroke of the shaft 3 via the slider 11 ranges from the rotation angle of the slider 11 to 0°.
It is within a range of 130°.

FIG. 23 shows a hinge device 30 according to a second embodiment of the present invention. This hinge device 30 has two rotational force converting mechanisms 5 installed in the casing 2 on both sides of the compression spring 4 so as to sandwich the compression spring 4, and the other structure is the same as the hinge device 1. In this hinge device 30 as well, rotational torque can be applied to the shaft 3 similarly to the hinge device 1.

FIGS. 24 and 25 show a hinge device 40 according to a third embodiment of the present invention. This hinge device 40 is a slider 1 of a rotational force converting mechanism 5 that comes into contact with the compression spring 4 and is equipped with a skirt portion 111 that covers the end of the compression spring 4.
10 is used. The slider 110 is formed of a cylindrical body with a bottom, and has a shaft support 112 formed in the center with a through hole corresponding to the cross-sectional shape of the shaft 3, and protrusions 13, 13 on the outer surface of the bottom. is provided. The slider 110 has a cylindrical part that constitutes a skirt part 111. The shaft 3 is passed through the shaft support 112, and the opening of the cylindrical part faces the compression spring 4 side, and the protrusion 13 is connected to the cam 1.
It is located in the casing 2 on the 2 side and installed inside the casing 2. When the slider 110 is installed in this way, the compression spring 4
The end portion is inserted between the skirt portion 111 and the shaft support 112. This insertion prevents the compression spring 4 from buckling and ensures stable operation.

This hinge device 40 also has a slider 11 (
110) and the cam 12, and between these sliders 11(
110), viscous grease is applied between the cam 12 and the casing 2, and this can provide a sufficient buffering effect. The other structure of this hinge device 40 is similar to that of the hinge device 1 described above, and rotational torque can be applied to the shaft 3.

FIGS. 26 and 27 show a hinge device 50 according to a fourth embodiment of the present invention. In this hinge device 50, the rotational force conversion mechanism 5 is constructed by combining a cam 120 with cam surfaces 17 formed on both sides shown in FIG. 28 and a slider 130 with projections 13 formed on both sides shown in FIG. is configured. The other structure of the hinge device 50 has the same structure as the hinge device 1, and can apply rotational torque to the shaft 3. Furthermore, this hinge device 50 has the advantage that the number of parts such as the slider and the cam can be reduced.

Furthermore, FIGS. 30 and 31 show a hinge device 60 according to a fifth embodiment of the present invention. This hinge device 60
The difference is that a torsion spring 140 is used instead of the compression spring 4 of the hinge device 1 described above, and the other structure is the same as the hinge device 1. At this time, the torsion spring 140 has one end hook portion 140a locked in the notch 2d of the casing 2, and the other end hook portion 140b locked in the locking groove 131a provided in the slider 131 that abuts the other end side of the torsion spring 140. It is installed in a stopped position.

Similar to a compression spring, this torsion spring 140 presses the slider 11 (131) and cam 12 against each other and converts it into rotational force, and the rotational force of the torsion spring 140 itself is added to this converted rotational force. The total rotational torque is applied to the shaft 3. Therefore, in the hinge device 60, the rotational force of the shaft 3 is enhanced by the torsion spring 140, so that it is also possible to reduce the number of parts of the slider 11 and the cam 12.

Next, an application example in which the hinge device 1 is used as a door closer is shown in FIG. Hinge device 1 is connected to casing 2
is fixedly attached to a base plate 100 fixed to a fixed frame. A slide rail 102 is fixed to a door 101 that is operated to open and close, and a long hole 103 is bored in this slide rail 102. The slide rail 102 and the hinge device 1 are connected by a rotating arm 104. This connection is made at the proximal end 104 of the pivot arm 104.
a is fitted into the shaft 3 of the hinge device 1 with its rotation restricted, and its tip 104b is fitted into the elongated hole 1 of the slide rail.
This is done by connecting to a pin 105 that is slidably mounted within 03.

In FIG. 32, a indicates the fully closed state of the door 101, and b indicates the fully open state of the door 101. At this time, a case will be described in which a rotational torque is applied to the shaft 3 of the hinge device 1 in a direction that causes the door 101 to close.

The door 101 is maintained in the fully open state b with the protrusion 13 of the slider located in the top recess 19 of the cam 12. When an external force in the closing direction is applied to the door 101 in this state, the protrusion 13 of the slider comes off the top recess 19 and moves to the arcuate cam surface 20, passing through the slider 11 to the shaft 3.
Rotational torque is applied to move the slider 11 in the direction of the valley recess 18 of the cam surface 17. This rotational torque causes the door 101 to rotate in the closing direction even when no external force is applied.

When the door 101 reaches near the fully closed state a, the protrusion 13 of the slider moves from the arcuate cam surface 20 to the valley recess 18. During this movement process, the rotational torque increases (see FIG. 22), and the door 101 becomes fully open and locked.

When the hinge device 1 is assembled to the shaft 3 so as to apply a rotational torque in the direction opposite to the rotational direction, the door 101 can be opened easily.

Furthermore, in the present invention, a similar operation can be obtained even if a disc spring is used instead of a compression spring.

[0045]

[Effects of the Invention] As described above, according to the present invention, sufficient rotational force is obtained by converting the spring force of a spring into a combination of two or more rotational force conversion mechanisms each consisting of a combination of a cam and a slider. Therefore, it is possible to obtain a hinge device that has both the function of rotating the rotary member and the function of buffering.

[Brief explanation of the drawing]

FIG. 1 is a front view of a hinge device according to a first embodiment of the present invention.

FIG. 2 is a left side view of the hinge device of FIG. 1;

FIG. 3 is a right side view of the hinge device of FIG. 1;

FIG. 4 is a longitudinal sectional view of the hinge device of FIG. 1;

FIG. 5 is an internal view of the hinge device in FIG. 1;

FIG. 6 is a front view of the casing of the hinge device of FIG. 1;

FIG. 7 is a left side view of the casing of FIG. 6;

FIG. 8 is a right side view of the casing of FIG. 6;

FIG. 9 is a longitudinal cross-sectional view of the casing of FIG. 6;

10 is a front view of the shaft of the hinge device of FIG. 1; FIG.

FIG. 11 is a side view of the shaft of FIG. 10;

FIG. 12 is a front view of the slider of the hinge device of FIG. 1;

FIG. 13 is a side view of the slider of FIG. 12;

FIG. 14 is a rear view of the slider of FIG. 12;

15 is a cross-sectional view taken along the line AA in FIG. 12. FIG.

16 is a front view of a cam of the hinge device of FIG. 1; FIG.

17 is a side view of the cam shown in FIG. 16 as viewed from the X arrow.

18 is a side view of the cam shown in FIG. 16 as viewed from the Y arrow.

19 is a developed view of the cam showing the rotation angle and cam height of the cam in FIG. 16; FIG.

20 is an explanatory diagram of component forces of the spring force acting on the cam of FIG. 16; FIG.

21 is an explanatory diagram of component forces of the spring force acting on the cam of FIG. 16; FIG.

22 is a characteristic diagram showing the relationship between the rotation angle and rotation torque of the slider on the cam of FIG. 16; FIG.

FIG. 23 is an internal view of a hinge device according to a second embodiment of the present invention.

FIG. 24 is a longitudinal sectional view of a hinge device according to a third embodiment of the present invention.

FIG. 25 is an internal view of the hinge device of FIG. 24;

FIG. 26 is a longitudinal sectional view of a hinge device according to a fourth embodiment of the present invention.

FIG. 27 is an internal view of the hinge device of FIG. 26;

FIG. 28 is a side view of a cam of the hinge device of FIG. 26;

FIG. 29 is a side view of the slider of the hinge device of FIG. 26;

FIG. 30 is a longitudinal sectional view of a hinge device according to a fifth embodiment of the present invention.

FIG. 31 is an internal view of the hinge device of FIG. 30;

FIG. 32 is an explanatory diagram of an example in which the hinge device of the present invention is applied to opening and closing a door.

[Explanation of symbols]

1, 30, 40, 50, 60 Hinge device 2 Casing 3 Shaft 4 Compression spring 5 Rotational force conversion mechanism 11, 110, 130, 131 Slider 12, 12
0 Cam 17 Cam surface 18 Valley recess 19 Top recess 20 Arc-shaped cam surface 111 Skirt portion 140 Torsion spring

Claims (7)

[Claims] 1. A hinge device for a rotating member that rotates relative to a fixed member, comprising: a casing fixed to the fixed member; a shaft rotatably attached to the casing and linked to the rotating member; A spring that is extrapolated and inserted into the casing, a slider that rotates integrally with the shaft, and a cam that is rotatably inserted on the shaft are configured to move relative to each other in the axial direction of the shaft as the shaft rotates. and a rotational force conversion mechanism that is combined and installed between the casing and the spring and converts the spring force of the spring into rotational force, and two or more of the rotational force conversion mechanisms are arranged in series in the axial direction of the shaft. A hinge device characterized in that it is attached with a 2. A protrusion that slides on the cam surface of the cam is formed on the surface of the slider facing the cam, and the cam surface is arranged between the top and the trough to rotate the slider in the direction of the trough. 2. The hinge device according to claim 1, further comprising an arcuate cam surface having a curvature such that the applied torque is approximately constant. 3. The hinge device according to claim 2, wherein recesses are formed in the top and valley portions of the cam surface, respectively, with which projections of the slider engage and stop rotation of the slider. 4. The hinge device according to claim 1, wherein the protrusion is formed on both sides of the slider, and the cam surface is formed on both sides of the cam. 5. The hinge device according to claim 1, wherein the slider of the rotational force converting mechanism that contacts the spring is provided with a skirt portion that covers an end of the spring. 6. The hinge according to claim 1, wherein the spring is a compression spring, a disc spring, or a torsion spring having one end locked to a casing and the other end locked to a slider of a rotational force conversion mechanism. Device. 7. The hinge device according to claim 1, wherein viscous grease is applied between the slider and the cam, and between these and the casing.