JPH11303499A - Hinge mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce processing cost and parts cost by making unnecessary to use a female screw to a male screw portion formed on a rotation shaft. SOLUTION: A hinge mechanism 1 has a construction which provides a delayed operation by converting the rotating operation of a rotating shaft 4 coupled to the second hinge 12 into the operation in a linear direction. A rear end cylindrical portion 5c formed cylindrically near the rear end of the piston 5 is provided. At the rear end cylindrical portion 5c, one or more through-holes 5e are made in the peripheral wall portion, and a spherical body 6 which is exposed to the inside of the rear end cylindrical portion 5c and is able to contact a valley portion of the male screw portion 4b of the rotation shaft 4 is arranged in each through-hole 5e. Thus, the rotating motion of the rotation shaft 4 can be converted to the operation in a linear direction through the spherical body 6 without forming the female screw for the piston 5 arranged through a whirl-stop mechanism in the coupling cylindrical portion.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a hinge mechanism.

[0002]

2. Description of the Related Art Some open / close units such as doors and lids have a hinge mechanism provided with an impact reducing function in order to reduce an impact when the opening / closing operation of the door or lid is stopped. For example, 2
A viscous liquid is sealed between a connecting cylinder for connecting two hinges and a rotating shaft inserted into the connecting cylinder, or a vane is further provided on the rotating shaft to be sealed by the vane. There is known a structure in which a viscous liquid is compressed in a rotation direction. These directly delay the rotating operation of the rotating shaft, but there are also those that convert the rotating operation of the rotating shaft into a linear operation and delay it by a built-in shock absorber mechanism.

[0003]

In the above-mentioned hinge mechanism, the rotation operation of the rotation shaft is converted into a linear operation,
The one that is slowed down by the built-in shock absorber mechanism can easily and easily have a large braking force with a simple structure, and is particularly suitable as a hinge mechanism for objects (doors, lids, etc.) with a large rotational torque. I have. In converting the rotary operation into a linear operation, a male screw portion is formed on the outer peripheral surface of the rotary shaft, while a female screw portion is formed on the rear end cylindrical portion of the piston constituting the shock absorber, and the outer surface of the piston is formed on the outer surface of the piston. Usually, a detent is provided to convert the rotation of the rotating shaft into a linear movement of the piston. However, in general, forming a female screw portion with a tap or the like has a problem in that processing is more difficult than in the case of forming a male screw portion, processing costs are high, and as a result, component costs are high.

The present invention has been made in view of the above circumstances, and employs a structure in which a rotational operation of a rotary shaft connected to any hinge is converted into a linear operation to delay the rotation. It is an object of the present invention to provide a hinge mechanism which does not need to provide a part and can reduce a processing cost and a component cost as compared with the related art.

[0005]

According to a first aspect of the present invention, there is provided a hinge mechanism comprising: a first hinge having a connecting tubular portion; Hinge mechanism, comprising: a second hinge connected to the rotating shaft thus set; a piston moving in the axial direction with the rotation of the rotating shaft; and a delay means for slowing the moving speed of the piston. , A rear end cylindrical portion formed in a cylindrical shape near the rear end of the piston, and a male screw portion formed on an outer peripheral surface on a front end side of the rotating shaft is disposed in the rear end cylindrical portion of the piston. In addition, at least one through hole is formed in a peripheral wall portion forming the rear end cylindrical portion, and each of the through holes is exposed in the rear end cylindrical portion and can contact the valley portion of the male screw portion of the rotating shaft. A sphere is provided. A hinge mechanism according to a second aspect of the present invention is the hinge mechanism according to the first aspect, wherein the delay means is disposed with the opening facing the rotation shaft side, and the piston extends in the axial direction. The inner tube is movable along the bottom, and has a bottomed cylindrical inner tube provided with an orifice, and a viscous liquid filled in the connecting tube portion. The piston has a through hole for the viscous liquid formed therein. A valve mechanism is provided that can close the passage hole when moving in the direction of the bottom wall of the inner tube, and open the passage hole when moving in the opposite direction. And The hinge mechanism according to a third aspect of the present invention is the hinge mechanism according to the second aspect, wherein the orifice is formed in a bottom wall of the inner tube. Claim 4
The hinge mechanism according to the present invention is the hinge mechanism according to claim 3, further comprising adjusting means for adjusting a flow rate of the viscous liquid passing through an orifice formed in the bottom wall of the inner tube. It is characterized by. A hinge mechanism according to a fifth aspect of the present invention is the hinge mechanism according to any one of the second to fourth aspects, wherein one or more orifices are provided on a peripheral wall portion of the inner tube. Features.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail based on embodiments shown in the drawings. FIG. 1 is a schematic sectional view showing a hinge mechanism 1 according to one embodiment of the present invention. The hinge mechanism 1 includes a first hinge 2 attached to one of a rotating object such as a door and a support such as a door frame, and a second hinge 12 attached to the other. .

On one side edge of the first hinge 2, a connecting cylinder 3 is formed. The rotating shaft 4 is inserted into the connecting cylinder 3 from one end 3a side. The rotating shaft 4 is formed such that the entire length is shorter than the entire length of the connecting cylinder 3. Specifically, in the present embodiment, the connecting tubular portion 3 is formed to have a length equal to or less than half of the entire length. As a result, the rotating shaft 4
A space for disposing a later-described piston 5 and the like is secured in a portion where the above is not disposed. On the outer surface of the tip of the rotating shaft 4 (the end located on the other end 3c side in the connecting cylinder portion 3) 4a, that is, on the outer surface between the tip 4a and the substantially central portion in the longitudinal direction of the rotating shaft 4 , A male screw portion 4b is formed.
The diameter of the portion where the male screw portion 4b is formed is smaller than the inner diameter of the connecting tube portion 3. The rotating shaft 4
Has a circumferential surface adjacent to the male screw portion 4b.
And an annular projection 4c to which an O-ring 4d for enclosing the viscous liquid 8 is attached. The rear end 4d side of the annular projecting portion 4c is disposed so as to project from one end 3a of the connecting tubular portion 3, and a portion adjacent to the annular projecting portion 4c is A stopper member 5 for preventing detachment is loaded. Note that reference numeral 4f
Is a viscous liquid injection hole penetrated in the axial direction of the rotating shaft 4.

As shown in FIGS. 1 and 4, the piston 5 has a cylindrical shape as a whole, and has a partition wall 5a at a substantially central portion in the longitudinal direction. Rear end 5 sandwiching partition 5a
The inner diameter of the rear end cylindrical portion 5c located on the side b has a diameter that the male screw portion 4b of the rotating shaft 4 can enter. The outer diameter is set so as to abut on the inner surface of the connecting cylinder 3, but a plurality of grooves 5d are formed on the outer surface along the axial direction. The groove 5d engages with a ridge 3b (see FIGS. 2 and 3) that protrudes along the axial direction on the inner surface of the above-described connecting cylinder 3 and performs a rotation preventing function. The rotating operation of the shaft 4 causes the engaged groove 5 d and the ridge 3
b is converted as an operation in the linear direction.

[0009] A through hole 5e penetrating in the thickness direction is provided at an appropriate location on the peripheral wall portion forming the rear end cylindrical portion 5c of the piston 5. A part of the rear end cylindrical portion 5 is
c, and a sphere 6 such as a steel ball is provided which comes into contact with a valley of the male screw portion 4b of the rotating shaft 4 provided in the rear end cylindrical portion 5c. The number of the through holes 5e and the number of the spheres 6 arranged in the same number are not limited.

The partition 5a of the piston 5 has a through hole 5f for viscous liquid formed therethrough.
Is provided with a valve mechanism for opening and closing the passage hole 5f. The valve mechanism according to the present embodiment includes a ball valve 5g and a valve holder 5h that supports the ball valve 5g. The valve retainer 5h constantly urges the ball valve 5g in a direction of closing the passage hole 5f by a spring member 5p provided between the valve retainer 5h and the bottom wall 7c of the inner tube 7. The distal end cylindrical portion 5j on the distal end 5i side sandwiching the partition wall portion 5a is processed so that its outer diameter is smaller than the outer diameter of the partition wall portion 5a.
Is projected in the circumferential direction from the outer diameter of the distal end cylindrical portion 5j. Then, the partition 5a protruding in the circumferential direction.
The peripheral edge of the viscous liquid passage 5m, penetrating in the thickness direction,
5n are formed.

Next, the hinge mechanism 1 according to the present embodiment.
The delay means employed in the above will be described. This delay means is, as shown in FIGS.
Has an inner diameter slidable inside, and has a bottomed tubular inner tube 7 whose outer diameter is set so as to be able to contact the inner surface of the connecting tube portion 3, and is filled in the connecting tube portion 3. And a viscous liquid 8. The inner tube 7 is
The opening 7a is arranged toward the rotating shaft 4 and the piston 5 side, and a groove 7b is formed on the outer surface of the peripheral wall of the inner tube 7 along the axial direction. The groove 7b engages with a ridge 3b (see FIGS. 2 and 3) formed on the inner surface of the connecting tube 3, and functions to prevent the inner tube 7 from rotating.

A first orifice 7d for allowing the viscous liquid 8 to pass therethrough is formed in the bottom wall 7c of the inner tube 7. The first orifice 7 d is provided with a viscous liquid 8 pressed in the inner tube 7 by the piston 5.
However, in the present embodiment, an adjusting means for controlling the discharge amount is provided.

The adjusting means employed in this embodiment is shown in FIG.
6, as shown in FIG.
Is formed on the inner end surface, and the adjusting shaft 9 has a communication hole 9c formed so that the other end 9b is opened on the peripheral surface. On the peripheral surface of the adjustment shaft 9, around the other end 9b of the communication hole 9c, an arc groove 9d formed along the circumferential direction is formed (see FIG. 6C). The arc groove 9d is formed such that the groove width D becomes narrower as the distance from the other end 9b in the circumferential direction increases. This adjustment shaft 9 is
The connecting shaft 3 is inserted from the other end 3c side of the connecting cylinder 3 and connected to the bottom wall 7c, but the adjusting shaft 9 is formed to be inserted into the path of the first orifice 7d. Therefore, the first orifice 7d is divided by the adjusting shaft 9 into a vertical orifice portion 7e penetrating in the thickness direction of the bottom wall portion 7c of the inner tube 7 and a horizontal orifice portion 7f penetrating in the radial direction. . And the adjustment shaft 9 is provided with the communication hole 9c.
Is arranged so that one end 9a thereof communicates with the vertical orifice portion 7e, and the arc groove 9d is arranged so as to face the horizontal orifice portion 7f. Therefore, the viscous liquid 8 pressed by the piston 5 passes through the vertical orifice portion 7e constituting the first orifice 7d, then passes from one end 9a of the communication hole 9c to the other end 9b, and further passes through the arc groove 9d. Thereafter, the gas passes through the lateral orifice portion 7f and jets out of the inner tube 7. At this time, if the adjusting shaft 9 is rotated by an arbitrary amount, the flow rate of the viscous liquid 8 that can pass through the arc groove 9d can be changed because the groove width D of the arc groove 9d is not constant in the circumferential direction. Thereby, the pressing speed of the piston 5, that is, the rotation speed of the rotating shaft 4 can be adjusted.

The inner wall of the inner tube 7 has
It is preferable to form an appropriate number of second orifices 7g at appropriate positions. In the present embodiment, two second orifices 7g are formed.
, That is, the rotation angle of the rotating shaft 3, the generated resistance can be made different. That is,
If the second orifice 7g is formed near the opening 7a of the inner tube 7, the second orifice 7
When the orifice 7g of the inner tube 7 is closed, the viscous liquid 8 is supplied only from the first orifice 7d.
Since it is ejected to the outside, the resistance can be increased as the rotation amount of the rotating shaft 3 increases.

Reference numeral 10 denotes a spacer provided so that the flange portion 10a contacts the outer surface of the bottom wall 7c of the inner tube 7 and the cylindrical portion 10b contacts the outer surface of the adjusting shaft 9. Is a stopper provided on the outer surface of the spacer for preventing the connection from coming off at the other end 3c side of the connecting tubular portion 3. The second hinge 12 has projecting pieces 12a and 12b at its base end, and
a, 12b, mounting holes 12c penetrated in the thickness direction,
12d. One mounting hole 12c is connected to the rear end 4e of the rotating shaft 4 so as to be able to rotate together with the rear end 4e, and the other mounting hole 12d protrudes from the other end 3c of the connecting cylinder 3. Tube part 10 of spacer 10
a so as to freely rotate around the cylindrical portion 10a.

The hinge mechanism 1 of the present embodiment is, for example,
The first hinge 2 is fixed to a door frame or the like, and the second hinge 12
To a rotating object such as a door. As a result, for example,
When the door is closed, the rotating shaft 4 connected to the second hinge 12 rotates. Since the sphere 6 is in contact with the valley of the male screw portion 4b of the rotating shaft 4, the position of the sphere 6 changes in the direction in which the ball 6 escapes along the male screw portion 4b. At this time, since the groove 5d is engaged with the ridge 3b of the connecting cylinder 3, the piston 5 does not rotate and the other end 3 extends along the axial direction of the connecting cylinder 3.
Move to c side. When the piston 5 moves in this way,
The ball valve 5g is pressed against the passage hole 5f by the viscous liquid 8, and closes the passage hole 5f. Therefore, the viscous liquid 8
Only the first orifice 7d and the second orifice 7g squirt out of the inner tube 7. Since the piston 5 moves while receiving resistance due to the viscous liquid 8 passing through the orifices 7d and 7g, the rotation of the rotary shaft 4 is also moderated by the resistance. Further, when the second orifice 7g is closed by the distal end cylindrical portion 5j of the piston 5, the viscous liquid 8 is ejected only from the first orifice 7d. Therefore, the resistance increases as the closing angle of the door increases. In addition, the rotation operation of the rotation shaft 4 and the closing operation of the door attached to the second hinge 12 are delayed. As described above, the resistance can be changed by rotating the adjustment shaft 9 by an arbitrary angle.

The viscous liquid 8 that has passed through the orifices 7d and 7g passes between the inner tube 7 and the connecting cylinder 3, and passes through the viscous liquid passages 5m and 5n to the rear side of the partition 5a of the piston 5. Leads to.

When the door is operated in a direction opposite to the above, for example, when the door is opened, the rotating shaft 4 rotates in the opposite direction, so that the position of the sphere 6 moves along the male screw portion 4b of the rotating shaft 4. In the opposite direction. At this time, the piston 5
Since the groove 5d is engaged with the ridge 3b of the connecting cylinder 3, it moves in the direction of one end 3a of the connecting cylinder 3. As a result, the viscous liquid 8 accumulated on the rear side of the partition wall 5a of the piston 5 passes through the passage hole 5f and flows into the distal end cylindrical portion 5j.
Release f. Accordingly, the amount of movement of the viscous liquid 8 becomes large, and the rotating operation of the rotating shaft 4 is quickly performed, so that the door connected to the second hinge 12 is smoothly moved in the reverse direction.

[0019]

The hinge mechanism of the present invention employs a structure in which the rotation of the rotary shaft connected to any of the hinges is converted into a linear motion to delay the rotation, while the hinge is located near the rear end of the piston. It has a rear end cylindrical portion formed in a cylindrical shape, and a male screw portion formed on the outer peripheral surface on the front end side of the rotating shaft is disposed in the rear end cylindrical portion of the piston, and the rear end cylindrical portion is One or more through holes are formed in the peripheral wall to be formed, and each of the through holes has
A sphere that is exposed in the rear end cylindrical portion and is capable of abutting against the valley portion of the male screw portion of the rotating shaft is provided. Therefore, there is no need to provide a female screw portion that is screwed to the male screw portion formed on the rotating shaft, and the processing cost and component cost can be reduced as compared with the conventional case.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a hinge mechanism according to one embodiment of the present invention.

FIG. 2 is a side view showing a first hinge.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a view showing a structure of a piston;
(A) is a plan view, (b) is a sectional view, (c) is B in (b).
FIG. 4 is a cross-sectional view taken along line B.

5A and 5B are diagrams showing the structure of the inner tube, wherein FIG. 5A is a plan view, FIG. 5B is a cross-sectional view, and FIG. 5C is an end view.

6A and 6B are diagrams showing a structure of an adjustment shaft, and FIG.
Is a plan view, (b) is a cross-sectional view, and (c) is an enlarged cross-sectional view taken along line CC of (b).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hinge mechanism 2 1st hinge 3 Connecting cylinder part 4 Rotation axis 5 Piston 6 Sphere 7 Inner tube 8 Viscous liquid 9 Adjustment axis 12 2nd hinge

Claims (5)

[Claims] 1. A first hinge having a connecting cylinder, a second hinge connected to a rotating shaft inserted into the connecting cylinder, and an axial direction with rotation of the rotating shaft. A hinge mechanism comprising a piston moving along the piston and a delay means for slowing down the movement speed of the piston, comprising: a rear end cylinder portion formed in a cylindrical shape near a rear end of the piston; A male screw portion formed on the outer peripheral surface on the distal end side of the shaft is disposed in the rear end cylindrical portion of the piston, and one or more through holes are formed in a peripheral wall portion forming the rear end cylindrical portion. A hinge mechanism, wherein a sphere that is exposed in the rear end cylindrical portion and that can contact the valley portion of the male screw portion of the rotating shaft is disposed in the through hole. 2. The hinge mechanism according to claim 1, wherein the delay means is provided with the opening directed toward the rotation shaft, and the piston is movable in the interior along the axial direction. , A bottomed cylindrical inner tube provided with an orifice, and a viscous liquid filled in a connecting cylinder portion, wherein the piston has a passage hole for the viscous liquid formed therein, and the inner tube A hinge mechanism provided with a valve mechanism capable of closing the passage hole when moving in the direction of the bottom wall and opening the passage hole when moving in the opposite direction. 3. The hinge mechanism according to claim 2, wherein the orifice is formed in a bottom wall of the inner tube. 4. The hinge mechanism according to claim 3, further comprising an adjusting means for adjusting a flow rate of the viscous liquid passing through an orifice formed in a bottom wall portion of the inner tube. Hinge mechanism. 5. The hinge mechanism according to claim 2, wherein one or more orifices are provided on a peripheral wall of the inner tube.