JPH0575877B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention can be applied to both left and right listening, and when the door is pushed open and the hand is released, the door closes automatically (hereinafter referred to as self-closing). ) This invention relates to a floor hinge device suitable for making a casing thinner, in which a mechanism linked to the pivoting of a door is embedded in the floor.

[Conventional technology]

This type of floor hinge transmits the door opening motion to a spring, compresses it, and automatically closes the door using the repulsive force accumulated in the spring. The problem is that the repulsive force of the floor hinge spring increases in proportion to the increase in the opening angle of the door, and as a result, the torque gradually increases, and as the door opens, the resistance force transmitted to the hand gradually increases, resulting in a lack of smooth door opening operation. There is a point. Also, since the amount of spring compression required for the maximum opening angle of the door is large,
Since the effective length of the spring cannot be shortened, the length of the floor hinge increases, requiring a relatively large space on the floor to install it.

Therefore, a floor hinge device of the type disclosed in Japanese Patent Publication No. 35351 of 1982 has been proposed.

As shown in FIG. 7, this is configured such that when the door (not shown) is opened, the repulsive force of the compression spring a is reduced by the crank rolling mechanism b as the rotation angle increases. That is, in this type of floor hinge device, as shown in FIGS. 8a and 8b, one roller d of the crank plate c, which rotates as the door opens, rotates as the opening angle of the door increases. A lever with a rotation radius of the rotation axis f with respect to the distance between the axis of the roller d and the rotation axis f, that is, the point of application of the force of the compression spring a acting on the crank plate c. As the length becomes gradually shorter, the axial displacement for compressing the spring against the rotational angular displacement can be made arbitrarily small. The torque of the door opening shaft, which conventionally increases as the angle increases, can be kept constant, and smooth door opening operation can be expected.

Furthermore, in this type, the amount of compression of spring a for a given door opening angle can be reduced compared to conventional ones, so the length of cylinder g that houses spring a is shortened. It can be stored in a relatively narrow space.

[Problem to be solved]

However, in this type of floor hinge device, since the hydraulic piston mechanism h is provided, the thickness for the cylinder g and piston i is required to be the minimum, and it is difficult to make the device thinner. There are some drawbacks: it is difficult to apply to things such as thin floors, and high accuracy is required in the machining of parts such as the cylinder g and piston i, leading to higher costs. There is.

Furthermore, this type of floor hinge device has a problem in that the self-closing force cannot be easily adjusted.

The purpose of this invention is to eliminate the above-mentioned problems, and more specifically, it is possible to freely adjust and set the closing force and closing speed of the door, and to achieve high precision machining of each part. To provide a floor hinge device that does not require a single unit, can be opened either left or right, and can be made thin.

[Means and actions for solving problems]

That is, the floor hinge device of the present invention includes a rotation shaft that is fixedly attached to a door and rotates integrally with the door, a pair of compression springs arranged in parallel, and It has a pressing plate that performs translational movement in a direction parallel to the direction in which the springs are arranged, and an engagement roller that presses and rolls against the pressing plate due to the elastic force of the compression spring at both ends. Therefore, the self-closing means includes an arm that rotates together with the rotation shaft, and automatically closes the door by the closing force generated by the compression spring, and a plurality of brake pieces are laminated and pressure-welded, and the compression spring a damper mechanism that generates a braking force that counters the elastic force of the damper; a gear mechanism that has a speed change gear and an eccentric gear disposed in a plane and transmits the braking force to a rotating shaft;
a braking member that adjusts the braking force, and the rotating shaft is rotated so that as the door closes, the braking force is gradually increased and the closing speed is gradually decreased, and the closing speed is the lowest immediately before the door is closed. the self-closing means and the braking means, and a thin and flat casing that accommodates the self-closing means and the braking means. be. When the door is opened, the braking force of the damper mechanism acts on the door, and as the rotation angle of the door increases, the elastic resistance of the compression spring acts to a large extent, thereby preventing the door from opening unnecessarily wide. ing. Furthermore, when the door is closed, the elastic force accumulated in the compression spring is released, and this becomes a closing force that causes the door to close automatically. In order to prevent sudden closing, the damper mechanism applies a braking force to the rotating shaft in opposition to the closing force. In particular, by using the gears constituting the gear mechanism as variable speed gears, the braking force of the braking means can be increased, and the braking means can be made smaller accordingly. By configuring the door, the rotation speed when opening and closing the door can be set to the optimum speed according to the rotation angle.
It is something that can be adjusted.

〔Example〕

An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIGS. 1 and 2 show a floor hinge device according to the present invention. A self-closing means 4 that automatically closes the door 1 using a closing force generated by the force, and a braking system in which a rotational braking force that opposes the closing force of the self-closing means 4 is transmitted to the rotation shaft 2 via a gear train 5. means 6 and self-closing means 4
and a casing 8 accommodating the braking means 6 and embedded in the floor 7.

The rotation shaft 2 has one end attached to a door arm 9 provided on the door 1, and the other end attached to the casing 8 via a bearing 10.
It is rotatable with respect to the 7 sides of the floor. Further, at the tip of the other end of this rotation shaft 2, an arm 12 having a substantially doglegged shape and provided with engagement rollers 11 on both ends.
A main gear 13 and a main gear 13 are respectively attached to rotate integrally with the rotation shaft 2.

The self-closing means 4 includes a fixing plate 14 firmly attached to the casing 8, a pressing plate 15 having a substantially T-shape and tapered at a portion facing the arm 12 on the distal end side, and fixing plates 14 to 14 that are firmly attached to the casing 8. Plate 14 and pressing plate 15
and a compression spring 16 that is interposed between the arm 12 and the compression spring 16 to apply an elastic force toward the arm 12 to the press plate 15. An adjustment shaft 17 is screwed onto the fixed plate 14, and by rotating and moving the adjustment shaft 17, the amount of compression of the compression spring 16 can be changed, thereby adjusting the closing force. It's summery. Further, a guide plate 18 is fixedly attached to the fixed plate 14. On the base end side of the press plate 15,
Guide roller 1 rolling and engaging along guide plate 18
9 are attached, and this guide roller 19
This allows the pressing plate 15 to move in translation within the casing 8. In addition, at the center of the front end side of the pressing plate 15, there is an engagement arc 2 in which the engagement roller 11 is engaged.
0 is formed to constitute the door stop mechanism, and when the door 1 rotates 90 degrees, this engagement arc 2
An engagement roller 11 engages with the door 1 to fix the door 1. The compression spring 16 has a configuration in which a pair of springs having the same length and the same elastic modulus are arranged in parallel, and the diameter of the spring is smaller than when a single spring occupies the entire width inside the casing 8. Since the size of the casing 8 is approximately half that of the
A large closing force can be ensured even if the thickness is reduced to about half.

The braking means 6 includes a gear mechanism 21 including a plurality of gears (gear train 5) and a damper mechanism 22 that generates rotational braking force.

As shown in FIG. 3, the gear mechanism 21 of this embodiment includes a transmission gear 23 that meshes with a main gear 13 attached to a rotating shaft 2, and a first eccentric gear 24 that rotates integrally with this transmission gear 23. and the first eccentric gear 24
a second eccentric gear 25 meshing with the second eccentric gear 2;
5 and a third eccentric gear 26 that meshes with the casing 8. Each of these eccentric gears is rotatably mounted on the bottom surface of the casing 8. The transmission gear 23 of this embodiment is 1/2 of the main gear 13 so that it rotates at twice the angular velocity (ωrad/sec) relative to the main gear 13.
Therefore, the door 1 has a number of teeth of
The transmission gear 23 is set to rotate 180 degrees when rotating 90 degrees. Also, at this time, transmission gear 2
The first eccentric gear 24, which rotates integrally with the third eccentric gear, and the second eccentric gear 25, and third eccentric gear 26, to which this rotational force is transmitted, respectively, have the same number of teeth, so they both rotate 180 degrees. It turns out. Incidentally, the first to third eccentric gears 24, 25, and 26 are all configured to rotate with the rotation center point 0 at a position where the lengths of the long axis and short axis are 3r and 2r, respectively. , thereby achieving the ideal closing speed of the door 1, that is, the closing movement of the door 1 such that the closing speed v gradually decreases as the rotation angle θ of the door 1 decreases, as shown in FIG. The gears are shifted and adjusted. That is,
The rotational braking force of the damper mechanism 22 is applied to the rotation shaft 2 while gradually increasing so that the closing speed v gradually decreases as the rotation angle θ of the door 1 reaches from around 90° to around 0°. It is adjusted to

The damper mechanism 22 generates a braking force by the rotational force transmitted by the gear mechanism 21, transmits this braking force again to the rotation shaft 2 via the gear mechanism 21, and thereby The rotational movement of the rotational shaft 2 is braked against the elastic force applied to the rotational shaft 2. Therefore, the damper mechanism 22 of this embodiment includes a braking device already invented by this inventor (see Japanese Patent Application No. 2704205 of 1982).
is being applied. That is, this damper mechanism 22
has an outer cylindrical body 28 fixedly attached to the lid 27 of the casing 8, passes through this outer cylindrical body 28, and is rotatably attached to the outer cylindrical body 28 via a bearing 31, and A brake shaft 30 that is fixed to the third eccentric gear 26 and rotates integrally with the outer cylinder body 28
An upper cover 32 serving as a control member that can adjust the braking force is inserted into the inner cover and screwed onto the cover body 27, and the upper cover 32 is alternately stacked between the two and engages with the brake shaft 30 and the outer cylinder body 28, respectively. first and second brake pieces 33,
It is composed of 34. Then, inside the outer cylinder body 28 between the bottom cover 31 and the top cover 32, oil 3
5 is filled, and when the brake shaft 30 rotates, the first brake piece 3 receives the viscous force of this oil 35.
3 rotates between the second brake pieces 34. The upper lid 32 is provided with an adjustment hole 36, which allows the screwing position of the upper lid 32 to be displaced to adjust the gap between the first and second brake pieces 33, 34, thereby controlling the rotation. The power can be adjusted.

The casing 8 is housed inside a cement case 37 embedded in the floor 7 and is attached to the lid body 2 with screws or the like.
7 is fixed to the floor 7, and a decorative board 38 is attached to the top of the lid 27. The casing 8 can be easily removed from the cement case 37 in the event of a breakdown or repair.

Next, the speed change and eccentric action of the gear mechanism of this embodiment will be explained using FIGS. 5 and 6.

Incidentally, the radius of the speed change gear 23 in this embodiment is assumed to be r.

When the door 1 is opened to just before 90° and then the door 1 is to be closed, the rotation shaft 2 is rotated at an angular velocity ω1/2 by the elastic force of the compression spring 16. At this time, the main gear 13 also has the same angular velocity ω1/2 (peripheral velocity v)
Since the transmission gear 23 that meshes with this rotates at an angular velocity ω ₁ (circumferential velocity v), the following equation holds true.

ω ₁ =v/r...(a) At this time, the first eccentric gear 24 is also the transmission gear 2.
3 rotates at an angular velocity ω ₁ , but this first
The circumferential speed V ₁ at the short shaft side contact point A (hereinafter referred to as the short shaft point) of the eccentric gear 24 that meshes with the second eccentric gear 25 is V ₁ = 2r×ω ₁ = 2v (from (a)) Therefore, the long axis side contact point B (hereinafter referred to as the long axis point) of the second eccentric gear 25 that meshes with this also moves at the same circumferential speed of 2v. Therefore, the angular velocity W ₁ of the second eccentric gear 25 at this time is W ₁ =2v/3r =(2/3)ω ₁ . The peripheral speed V ₂ of the second eccentric gear 25 at the short axis point C is V ₂ =2r·(2/3)ω ₁ =(4/3)v. Therefore, the circumferential speed at the long axis point D of the third eccentric gear 26 that meshes with the short axis point C of the second eccentric gear 25 is also (4/3)v. Therefore, the angular velocity W ₂ of the third eccentric gear 26 is W ₂ =(4/3)v/3r =(4/9)ω ₁ .

On the other hand, when the door 1 is closed just before 0°, the angular velocity W' ₂ of the third eccentric gear 26 becomes W' ₂ =(9/4)ω ₂ . (However, the angular velocity of the transmission gear 23 at this time is ω _2. ) In this way, when the door 1 is opened at a rotation angle of around 90°, the rotation speed of the brake shaft 30 is slow, and therefore the rotation speed of the brake shaft 30 is slow. Since the amount of rotation per unit time of the first brake piece 33 that is locked to the brake shaft 30 and rotates integrally therewith is also small, the braking force is correspondingly weak. For this reason,
Almost no braking force is applied to the rotation shaft 2, and the door 1 is self-closing at a high speed.

On the other hand, when the door 1 is closed to nearly 0°, the brake shaft 30 rotates at a high speed, so the first
Since the amount of rotation of the brake piece 33 per unit time is large and therefore a large braking force is applied, the door 1 performs a self-closing operation at a low speed.

Therefore, according to the floor hinge device according to this embodiment, when the door 1 is opened by pressing with a hand or the like, the rotation shaft 2 rotates together with the rotation operation of the door 1. For example, when the door 1 is rotated clockwise, the engagement roller 11 is also rotated clockwise, so that the engagement roller 11 resists the elastic force of the compression spring 16 and presses the press plate 15.
Translate to the right. At this time, the compression spring 16
is compressed and a restoring force toward the left is accumulated.

Next, when the hand or the like that was pressing is released from the door 1, the engagement roller 11 is rotated counterclockwise via the pressing plate 15 due to the elastic force of the compression spring 16, and accordingly, the engagement roller 11 is rotated. Shaft 2 similarly rotates counterclockwise.
Due to this rotational movement, a rotational force acts on the third eccentric gear 26 and the brake shaft 30 via the gear train 5, but a braking force opposing this is generated in the first brake piece 33, and this braking force acts on the rotating shaft 2 via the gear train 5 to control the rotating operation. In this way,
As the rotation angle of the rotation shaft 2 decreases, a large braking force acts, and this braking force reaches its limit when the rotation angle reaches 0°, and the self-closing operation of the door is stopped.

As described above, by using the floor hinge device according to this embodiment, by changing the eccentric position of the eccentric gear, the rotation speed can be changed to non-uniform speeds, and thereby the self-closing operation can be freely performed. can be set and adjusted.

Furthermore, if the floor hinge device according to this embodiment is used, the rotation angle of the eccentric gear can be freely set and adjusted by changing the ratio of the number of teeth between the transmission gear 23 and the main gear 13. By increasing the ratio, the rotation speed of the eccentric gear can be set higher,
As a result, by increasing the braking force, it is possible to further reduce the thickness of the damper mechanism 22.

Further, if the floor hinge device according to this embodiment is used, when the door 1 is rotated by exactly 90 degrees, the engagement roller 11 engages with the engagement arc 20 of the arm 12 and is locked at that position. Because the system operates, it is suitable for cases such as when transporting items.

〔effect〕

As described above, the floor hinge device according to the present invention allows the closing force to be freely set and adjusted by rotating and displacing the adjustment shaft to adjust the amount of compression of the compression spring. The self-closing speed can be freely set and adjusted by rotating and shifting the gear mechanism that combines a speed change gear and an eccentric gear, and adjusting the rotational braking force of the damper mechanism. It is possible to gradually increase the power and gradually decrease the door closing speed, and control the door to the lowest closing speed immediately before closing.
This makes it possible to achieve the best possible door closing operation, which has great practical value.

Further, the floor hinge device according to the present invention can be used as a double door floor hinge device since the same effect can be obtained even if the door is rotated clockwise or counterclockwise.

Furthermore, the floor hinge device according to the present invention includes:
Instead of conventionally using pistons and cylinders, which occupy a large casing, increase the casing thickness, and require high precision parts machining, they are arranged in parallel on a plane with self-closing means such as compression springs. Since a damper mechanism is used, the casing thickness can be significantly reduced, and costs can be reduced.

[Brief explanation of the drawing]

1 is a schematic cross-sectional view showing a floor hinge device according to the present invention, FIG. 2 is a plan view taken along the - line in FIG. 1, FIG. 3 is a plan view taken along the - line in FIG. 1, and FIG. 5 and 6 are graphs showing the relationship between the rotation angle and self-closing speed of a door equipped with a floor hinge device according to the present invention, respectively. An explanatory diagram showing the angular velocity of the eccentric gear when it rotates to just before 0°, Fig. 7 is a schematic cross-sectional view showing a conventional floor hinge device, and Figs. 8 a and b are explanations showing the action of the crank rolling mechanism. It is a diagram. 1... Door, 2... Rotating shaft, 4... Self-closing means, 5
... Gear train, 6 ... Braking means, 7 ... Floor, 8 ...
Casing, 11... Engagement roller, 12... Arm, 13... Main gear, 14... Fixed plate, 15...
Pressing plate, 16... Compression spring, 17... Adjustment shaft, 2
0... Engagement arc, 21... Gear mechanism, 22... Damper mechanism, 23... Speed change gear, 24... First eccentric gear, 25... Second eccentric gear, 26... Third eccentric gear, 30 ...Brake shaft, 32...Top lid (control member),
33...first brake piece, 34...second brake piece.

Claims (1)

[Claims] 1. A rotation shaft 2 fixedly attached to the door 1 and rotating integrally with the door 1, a pair of compression springs 16 arranged in parallel, and an arrangement of the compression springs 16. A pressing plate 15 that performs a translational movement in a direction parallel to the installation direction, and an engagement roller 11 that presses against and rolls against the pressing plate 15 by the elastic force of a compression spring 16 are provided at both ends, and the pressing plate 15 moves forward and forward. It includes an arm 12 that rotates integrally with the rotation axis 2 according to the operation,
A self-closing means 4 that automatically closes the door 1 by the closing force generated by the compression spring 16 and a plurality of braking pieces 33 and 34 are laminated and pressed together to create a braking force that counters the elastic force of the compression spring 16. A damper mechanism 22 that generates the generated braking force, a gear mechanism 21 that has a transmission gear 23 and eccentric gears 24, 25, and 26 disposed in a plane and transmits the braking force to the rotating shaft 2, and a control member that adjusts the braking force. 32, a braking means that gradually increases the braking force and gradually decreases the door closing speed as the door 1 closes, and controls the rotational operation of the rotating shaft 2 so that the door closing speed reaches the lowest speed immediately before closing the door. 6, an adjustment shaft 17 for adjusting the amount of compression of the pair of compression springs 16 to adjust the closing force, and a thin and flat casing 8 for housing the self-closing means 4 and the braking means 6. A floor hinge device featuring: